AN ACCEPTANCE TEST AND ANALYSIS
OF THE SPECIAL MOTOR GENERATOR
SET NO, M 24 AND ”M, (25.
mm: DIRECT CURRENT LABORATORY
OF THE MICHIGAN. STATE COLLEGE

”Thesis for the Degree of B. S.

G. N. Yerkes M. C. Hoffman
’ I .1928

 

EH 5515

5N ACCT“T0“CT TVQT AND ANALYSIS

OF TH?

SPECI'L HOTQ“ “VWVPITOR SET ma. M 2% sun u 25.

{N THE
pIpFCT CUPPFNT LA’flDRTOPY
0F TH?

uICHIG~N STA”F_COLLEGE

a THESIS
SUfifITvvn TO TH? FaCULTY
OF THE
MICHIGAN STBTE COLLEGE
BY
G? N. XERKES M. c; HOFVMAN
._._

CANDIDATEQ FOR DEGREE OF

PACHFLOR OT RCIFVCE

JUNE 1928

 

- ,, _ 1 - L
i 5': 32”,.1‘
, ‘5 r s I. . \ ..
r ' ' I .A ‘
"" ‘ 2' (Y'- " - ,2 " 0' t" é
L" '. :(fi";‘ 5-- C: “ .'.
:‘(g/ ' r I —
~- .. ¢;'>$(.’.vr".9"7' \ "a a: . '
. .‘I ’f". _ . ‘0’. ‘ ’ '
; .-i":..- ,,,.,. mi" ’ ’ ‘ f
.T". ' I r r '
i . .‘. '0 o" | 0

TH ES-ISI

 

 

man: or comm-s;

 

 

 

 

 

 

 

 

 

 

 

 

Profane ~ 5; - ~ A —!wg..‘3
Introdnathon v F W? = 4,
Theory of 3 direct current generator C ___-___ 7
floor! of: synchronous motor ———- w 2—: »-— 14
Hothod of procedure n h. —_ -_ wt- :w —33
eon-anon diagram w‘ 2:“ v. __—— “—31
Tall-ted data. -:——w..—~ —__,_ _:—35
fabulatod results -:- 7 -~_- *— #—__.—.-—_ .73
”10 mutation! : w A - _— —___:—_-3°
mmflmumn:r:= w, zrzgf;f:11‘zfl‘.
”Mandamus :1--: w ¢ .1
Biblioyaphy - +w-21 -_ .. __9‘

103.— 3:3

P R F F a C E

he the authors nre extreeely intere'ted in the nhrlico-
tion of electrical enerey to machinery, it W“3 thonWht to he on
excellent opportunitv to anplement the reeuler four year Eleo-
trical anineerinq Course at V. 3. C. with an extonied test
on the atecinl motor generator net ionntei to the engineer-
inz department by the Consueere Power Comrnny.

The characteristics of this set were entirelv unknown
to the enqinoerint department. Therefore the tc;te were con -
ducted qlong the eeme lines as q commercial acceptance test.
It is hOped that the tests taken will he sufficient and
accurate enoufih to answer most iueatione which qu "rise in
more experimental t13te which muv he conin“ted at some later
into on the set.

The authors toke this time to thank all thoee that had
contact With the tents, either iirectlv or in11rent1y and

wish it to he 1rho'm that all n11 ens qreatlv phvreciqtei.

I N T R 0 D U C T I 0 M

Prohthly a more clear conception mnv he ohteinei as to
the reescn for Conductiuw the texts on the sreciel venerqtor
set if one has n brief review of the history connected with
the set. The set had been oriqinnlly used as e pert of the
equipment of the Grnni Rerifls-Kslntezoo division of the
Michienn Electric Railways. at the heeinning of the oper-
ation of this line the Operatinq voltage was ZHOO d.c. This
rerticulor set hed been instellei at n noint where only 2&00
volt d.c. from a third rail was nveilehle to f‘urnis‘i e.o.

rover for a part of the sivnal svstem. At e later date the

Vonteith Substation was hailt with a 5000 volt e. 0. Circuit
to take c*re of the sifinal system throu‘h transformers qt the
Vnrious signal locations. Coneeiuently’the special wotor
senerntor set Woe no lonver neeiel.

The set consists of e 2&00 volt d.c. motor with cemrouni
and commutatinq field winiines, a double wound errature with
n douhle commutator, permitting series or multirle connection
end making it possible to operate ei‘her on 2300 volts or
1200 volts. The cenecity of the d.o. end is 7.U ewrs. at
ZHOOvolts or 19.76 Kw.

The a.c. eni of the unit conaiet of a 3 phase, 60
cycle, 35 ampere, 220 volt, 13.}? kva revolvinw field zen-
eretor, with en Operatinm sneei of 1200 B. P. M.

Both the d.o. and a.c. sole of the unit are equipped
with indiviiUnl exciters mechanicwlly connected to the one
main shaft of the unit, esch exciter heinq compouni wound,

althourh each has slightlv different characteristics.

It sh0n13 he borne in m‘sl that the 3.0. machine mns‘
designei ns s scner tor and the d.c. meshine W13 desienei as
e motor;tut at nrssent/eosditions ere reverssi; 1.6., the
1.0. seneretor is heinr run as e svnchronons wotor while the
2300 volt d.c. motor is neine rneratei es n cen~rqtor. The
above chanse is causei hv not havins 2&00 volt d.c.
ensilehle on the campus. For this rwsson)in all tests the
d.o. meshine is referred to as n sen~rntor nni the 9.0. machine
as n synchronous motor. The euthors are aware of the fact
that the unit prehshly is not as efficient runninq in this
asnner as it wouli be if operation was °s inteniei; also,
it mieht he inferrei end was rfifiiilv nroven, that the e.c.
ssnerqtor is not an iienl evnchronous motor-due to its
huntine characteristics ceusei hv no amortisaeur winiinv
being present.

Due to the fact thnt no amortisseur winiinv is present
in the svnchronous motor,its starting cepnbilities ere limit-
ed and the set is brought us to svnchronous speed hv the evcit-
or on the 3.6. end operating as a shunt motor. This suhjects
it to an overload of short iuretion which proves not to he
harmful.

All measurements were take. With considerable Case in
resorts to accuracy. all meters were Cslihreted eni when '
any sre~t iifference misht result from the relative position
of waters in the circuit, utmost Care was pltoed on this
factor. Pefore all tests the machine wws run for e short time

so that friction conditions w0nld become stehle.

ConsidernFIe care was exercised in eliwinntind fill danwer
of electrical shock, especiAIIy from the 2100 volt 1.0.
qenerntor. The frame of the unit snl one 1116 of the
4.0. line was groundei m¢?inm it roasihle, in rest tests,

for the orer~tor to keep free of all nnqrounied cirCnits.

TFEDPY OF A DIRECT CURRENT CENERfTOR

An electric generator is a machine for converting
machen1Ccl work into electrical enerry, while an electric
motor is n mechine for convertinf electrical energy into we—
chanicel work; Contrary to a connon belief, the electrical
Construction of the two machines are nearly identical and
the mechanical features mey be said to be exactly 30; however,
a machine designed strictly as a generator has characteristics
which rate it a core Geeirable nechine for its particular
work than a motor would heve when oneretine as a generator.

As all of the D. C. machines on the particular set tested were
run as generators, only the theory of the direct current
generator will be Ciecuseed.

.The fvtoerentel nrirciple involved in the construction
and orerstion of nny type of dynero electric machine is the
production of en electromotive force in one or more conduct-
ore by the relative motion of these conductors and a magnetic
field. Protehly tnie megrgore eeeily explained if reference

13 Uxade 130 Fig. 1-

.
O

-
-

"‘0
“050.,"

 

In the broadest eenee of the word, it is seen that
a dynnao C:neiste of two «ajor parts; that is, e roynetie
evoltixr conductors. Ass min: tne
rotation of the nrwetnre coniuctore is as shown, an elec-
troeotive force or voltage is induced it the co Factor
which causes a current to flow in tie cirectian e own,
according to Lenz‘e Lew. T“ie influeed volta"e Ceoenie,
with other t inre, on the rate at which the Iineaof force
are out, which is nronnrtionnl to the flux dennity and
the zeta at which the rrxnture is rotited.

Khan the‘CQnductore are unifornly enaced about the
are ture, it ie evijent tn't YJCQ one cidc of a coil is
on or a sooth 0018, the other side rill he under the north

.1,
i
‘

Dole, 9:15 the e. ect1'<)motive FOLCGS induced 171 the two can--
Sectors rill ea 6 uz1l nni anoeite.

JOE“? I, an inspection of Fir. 1 will Show tn t oc-
ttecn the t"o him-hes on one ei’e of the armature, the
EISCtIQ otive forces are all in the {“he 11 eci:i?n. Sir-
ilqzly the electromotive forces on the other side are :11
in the cane direction, both sides tenoirg to cause a rise
of pot:ntiel net e the two brushes. This plnne in w7ich
the brushes 3 ould be stationed in an ideal wvc ire is
known ~e the neutral plane.

As the Conductoret W3 33 from one side of the neutrrl

plane to the other the 6180' tromotive force chcn,ee riitin

them as they come under the influence of conceite fielfi

1

“\I

I";

polarity. Titfi Inapgot to the trustee the Girection o
the electrototiro force 1“ ttin oor¢nctor IGWCifiB unchang-
efl. At thin point tho com utntor olnys 9o itoortant role.

The Go rutrtov is o cylinfisr formed of motzl so manta

inoglatad from 9°33 3th?! eflCW 97W??pt heinw configctefl to

C.)
(lo
0
\J
'k
r-L

~ ‘-_-' I‘ ’~ f‘v.‘ . (w. -. . 1 « v -‘ - .ps . V ‘ ' . J‘ .
eg»111y 3,93 _ 93;.21.3 1‘ 12o ornatire Vihfiluj. Its

function, on way he itforrcd, is to rectify the electro-

fotive forces in the arnoture, kee in? the resultant force‘

‘ettoon too tr) trnotos in too pone diroction.
As a raver? 1 o- electromotivo force takes nicoo in

3301 orvttare coil o“??? tire the two 09"“n33tor so rotta

to WK 2' it 13 can'eztef ©“r3 xiCor a brush, iifiewiso they
.. _ A U 12- . . ' . : . - ‘ '~ . -: L -.-\ ‘ . Q -. 0‘ . ' l .‘ l —I
is 1 TWV35371 of 312(311. U11ezs cofiuoin oreoautiuns ,re

the 'ir film in iwtooiota CT“tTCt with the so: utotor

U)

A 1 oejvont 163v01 3 brush the difference of notcntir

7_.+'=.twe+?:?1 t7»: ‘-‘-r1m‘n 750:3. tits». oer-moot 1’? oft-‘3". to “.1“ Ior‘o

L- .L:
3303 (To) moroco tfio onr’uoe o? contoct. A? thio cottact
arse beooneq omoller uWG onwil r the rooisteuco hnoomcs
{re t3n"nri'flqe curtaifz'x):rawcncs zoro. fiFYE'?3fiI$3 o?
pi-rfsct c.:>‘-1:t.t“-tioi1 it: contro'iior‘: by three nonvor in 'v' is '1

the current difio flown in the short Circuitefl coil, and if

the Vfiila of this I R droo is 1333 than enon~h to break on?

-ne cottrct resictnnce, soorkinc will not occwr,
At t“is point it is well to point out the diffioxity

it obtaininf o relirtlo raidio: for the affective contact

.‘n

resistance of the bruebee while nae 190 199 is in Patien.
Even in the 9996 9991 re with the 9999 current nutfiut the
b rU9h tron m919u99L 9t dif”erent brush aITS 999 9t 61f 1ent
tires 99V Very 1001 or were. This 19 Gue,er 39 verf 1119-
1y to be increased bv high 9109, uneqnpl fliV1eiwn or the
current avonw the bruuhes 99d brush arrs, vibretion or
chattering of brushes, and,by far the woet imaortent, 9y
the co =utation and strength of the nn~netic fields in
which the short 011 edited nails are cemwutated. Sn tor
t.1e nur1o es of t 19 exreriment the r9919 t9n nee of hrnet99
39¢ cuntECtB were tpken 9t etgnéetill.

In a further discuegion of commutation it is Well to

berr in wind the effect of the self induced veltere eet

”J

uw in the armature 99119 93191 19 099996 996 tenfls t3
ovuoee the drinv out of the current in the 09119. W 1999
the self i9duced vwltave'ie neutralized the our ent in
the coil 9111 Chan 9 90 raeidly in the coil 9t the cnfi 99
the short Circuitinfl period that Sparkind at the hrvph
contacts Will result.

Various methods have been devised t0 nvercore the
self induced velter but in ell mechiees of fire9ent 699i 9,

the iUtPTDOIU i8 Du ivvrselly ueee. The intzrewle or convu-

a.
'-}J
\. )
l<

. - ,. ' ' .\ 19.. ‘
deutl p 991191

-m

we a m9fwetic

C?

titlflf polilas it i ,
field rhich is Cut L; the erwnture cathQtors as tfiey 9:9
01m9ut1ted. T018 iniuces a v lta e in the 01961“: :13 wyich

snould be of such a value tnet the current in the coniwct-

C

or will die Jown 9t such a rate so 99 t0 ohtein what is

kxovn an strniwht 11v? cwrwutrtlo* or rm

.~ F...“ 1.x-1
63 thé awarutlwn o» a .9u3* tar as thaw

m. ‘

fixld lain” out h? 33V5t3?0 C)W”:¢t9:3 it
in C?fi1"1ti“‘ t5: diff?rént vvvs *1 which

IQ“TT€C ta ex71t¢ti‘n; 1.9. 8'31?“ o‘nvt

9"-

.J-

The euries Wenerfitnr Hrs a fielfl “inflinfi "him“

satias with tLe srvature
th? ”F*”WBV?? 'l’fi £17”? 1' Tflx*‘fi“1d. A

3 eynl+fd b" 9 Vi“fi§“# ""581 Q fiW“n‘fifi

ifi £319 0??? Gal? 9 #7‘3117” 9 +"w 0v" 9%

~¢~ .— -. \. -n,.-~ .v

Tina M'Wm‘r ""TTQ-it <4~ an“

.\ 9'. A ’ .49-~ w 1. ' w‘ ‘ '1 ‘V ‘ a w. :,‘.: ._ I. .
vjfiwleu ‘939 crvpauwfl rhn r» 0?9. u .wnnnfl
“33 “US-511fif“35 ifiga cw;wflx*hiVé an *“Ua£.rt‘7

0 un‘. ”an? tuna E a “fit a ~=‘nt rm? w.-§n~
_ . , - . A A< ' _ a . - . ‘3 ~ .2 u -- ‘4

\o

- — ~‘- \ - :7 ..1 -. -.'.'- ~'- .2
093.7 nl- fixrwazo ‘191"“ t"”~ rwlx- 1'5? PLTTN3M

“it' 3”?”90t to c ch fielfl "i fli *. In a

' '3
4
I

pmwaxfi 1mt? H 91:13 9W3 CZ-if’".‘fi’§’:". 5.“ 1:4:

0+.9T mfi?vfl, hfi‘ 9‘? tfirflifi~ t¢ W??? 5??

- h" " " ~ ‘. .
4 ".'¢=r~:"-t1.',t_ (PW: 7132*».1 +1 6

v-o-fi
' l
r.)
\
J-
:1-
, .-d
N
O
.4
3
J
1
J1

e ch cine; rrfi the T?“Y1t””t 9*f90t-

f‘l.
4
1

’0

3fi

g-J

5‘.

IJ-

fielfi,io tfinfiidfi t? farce f1»? j? are ”irccuié",

i 5

other is téwfjrw to *orca flax 1% 1p? opposit

Prov 53 33:814rt1*n n? o F "“33 fi'flrtw

\

tions of a cannonnfi ven0r7tnr, it 1% IQP5

becove§ a diffnrnntihl watfir.

by réferrinF-tn thfi fallomirv fi"fir€.

(IF-.59 vrfv ‘1’;“,¢+

I
1 Fl '3
k“
. J .
‘ L V‘- 3
Iv: » J'
J. \ .

, that is, the ourxent fle"inr

-4

>JI
3

-9

1 r“ "
\ ‘1
.~
/\
v u
i‘)
“-I
O
1 ~' 1
J.- . ‘

a
1'. 'g
A .A

‘.

\

. \F.
‘_.' L'
‘ A
6 xi
..

‘1" ‘I‘

v- ‘

I \
awan that it

be €xp1"i Ed

”1

t. i)

 

? i ' a” i ?. -‘?" *
v":<(u* *’ 3 ~77 '7~ ‘t ‘¥:. ('7 “i<: 7 ,‘r) .1’ i w
10“1 D"‘To Vw0419 tHQ 01f"0tiCH
a» é vwn‘ o?'*'iwi Efirngxfi'u Ir” :3

xii (5- 1’11“ 015’ .. t*

(31-? 117,- iJ1.tTE: (3; rs $7711~wc’(r;% ;A :7-' L . ~ 11
ef u tl’ -le “ "t: n-t #3

1’3; '3.

howwnn-

« v"'.>"r'\:.‘;/\ fi't: (1

n r.

d 0 I"

.9.
(a
a
:_+

‘t19111y

. 4". __ ‘
TSlkhjh ”

‘ ‘1 o 3
v‘.a * Y;;c.7‘.'s

1 .. ‘ '1
.1’ " 1.1 1’1": 9:20 ’ . 11'.

. '1 _: s

:ULU‘; Lu'i.h LL one

.a . ~ .‘, J~ “ . .
; L1 - SLL:" 0 (NW .-

{1.31) diT'fE‘J ~. D1316}. A‘Hnd.

(3w!

r0vc;:ei.

br?w tin 0?: U‘ t ¢~‘v4 ffir syn: ID 123 -. the olff'r-
ertia1?;'(n_ ywurC ‘(rlnrt :Cde 1*lz’w ‘ .kh Jr ’1: CuiCevxite

00.x Ofrx t: J :r::;

11“?16 ts rtnrt U“ 1. tiy wrnrx firecbioq nae

«Q.-

influctwwce Cf *L? :‘wnt field Cinsafl b? m wvn;

'\"‘ “‘2‘ . I "13", ' .3.“ A o u .. ..'u'.< t'-_ L‘~ “ .v‘.
i“ ,’ 1-1.1“. 1-,1‘ T.‘ ,‘f' t,':r‘3'.'v ".‘" :fi_‘ 1' ."f’L‘IB I“. I': (.1517.'...

U

§lfit fifld tfivvt the cvzhiwrt 11 ffw? styles

.4-

o‘I

bail:

o 17 ‘. raw 'u‘f.
‘_‘ .. 1

’ u‘.

tuft currvrt, W57 nverwawar t3? #"fififitixifl~ o-

J
I!

shunt vindirvgrnvi 91 rDVfiTrfi the fwiUK'”T’ rarw

rotation. In the fifltnti*9 1h? 9 uflt Ilild cur

- - “ u - -o . .o ...: ..I . .5. . . ‘ .. ' . ., a ‘
huan h'ilvgn! n? f;fi ' E"1;Yj' F”‘tlf3 5l;~,1

- a. ‘I "1 K. . ‘— -‘ ,- . ‘5‘ ... ., . . .-. - - ‘g ‘ .~. .
020m? 0? 3{}”Jfifid tnr'ne, fl .(N‘57 -7;\ U Sm.-“r'

vb

' 3 ' ’ . I ‘ "7 ‘ ‘f‘ ' " f? 9- o '. >‘1 -5 - ~- 1‘ - p’. .' . .
113*? "" 7' ”3113373 "31 T‘DV“: ""3 .‘ 3 -" ,3 “1-317. E. 1:" :1;
.0. .1 1" any 7‘! P11. . -‘. ‘, ,. -‘1‘ 3." ..
v‘ 3 1 fl . a - . . ,- .
mm no m. w ..r . . . . - 1.: 3 1 L .L c «z.

‘ .' 3 ., .. '. "p. . -" 4.? .9 J. .3 ‘ . .. ,. ~.' ."'I
rlrfit 9*; CLLQ“ ;ut i -90 ;ni!.:l Ct runs 1-.

0', + ' . ‘ or} ' r l‘l 1 - "0 .vs' - u . o“ u '- s. .3 J'- V . ~ . .. T. : '.
(.’ .i. (1“. :_. “.1? ‘ .9. +3. ;‘. L; ’ I. 7' ‘ {? t ‘ - .:. 1 l r C‘- a _' '..J L . 2. j. r‘ X“ r 7" ‘7' It; ,_ _~ _ .
on- ... ' ‘ - ,_ ...- ". . I
I ‘7‘ ‘ ' ,) J‘L ‘1' L15)?“ 0 ‘t . ' - r‘ ‘ t.‘$ W I‘ [S 1")“. L‘

’3
"D
..J
5.
H.
J
...)
Ԥ
3‘
4-
4
r- '-
I4
24
a q
.1}
‘3
t
.71-
r'"
4.
.. a
’2
I:
+

09 "five wur;rnt fine t7 th? rifizc&i :9 817: i.

rm «. . m ‘ ‘ I ». '. Q ' 1’ "I “ "" \ fi’ ’. ‘ ’1‘ ‘-
r 111*! Kerr. *9 0- 'u': an” 'L :‘t~

ci'L11=t‘i.01‘a of C‘..‘1I‘T€:?1'b ""111 Cfi.”-’Cii"-.L‘23 until 1i. ”cc

. ‘..'1 . ‘.. ‘l' - . '..‘-
09361ve "s in rmvner the 3 Jaime 0””? "fiaiv_3\

L".

r.
'—-'(

no

'9!

‘ .
r;

-1

4'.

hi

t‘ .i 7".
l ‘ “
,,. --vi
(3 .v1
- ..L
l_ 3 .13..
,a-gr
{‘0‘—

" "' u-
.l'__‘\) l
-._V.‘ ..‘(9
4‘v~l JO

T‘TEOFJ‘Y 0" A ST:"’CT¥‘-.~LC’T("NE‘) T’C‘TGR

An alt rnotin? current rotor comprises, like any dynamo-
electric nechine, an inducing warnetic field 3nd its induced
circuit, the one turning with respect to‘fie other. P:ut while
the field of D. C. notere is constant, th‘t of A. C. rotirs
may be eith r constant, tltcrn'tinn, or revolvidr, deurnCinp
on whether it iv produced by direct Currect, alternotinfi
cu: ent, or a syster of polyphree currents. The class of
interest,in this erticle, ie th-t u chine nhich hoe n cwnetont
field and 18 known 28 e synchronous rotor.

Constant fieid voters crn 1e characterized by the fact
thrt the erm"ture roteti n C“n he *aintnin-d ‘t a sin 1e
speed 0=1y, which is synchronous With th alternction of
the current supplied. It is the ehove wentioned character-
istic which gives this Dottie ler cachine the nere”eynchron—
one rotor".

Sync?ronous rotors hove the e~me construction 99 alter—
natore with the possible exoeotion thot nynchronous motors
ale always built with solient poles. However, on; eltrrrntor,
or synchronous generotor will run as o synchronous rotor;
likewise, any synctronoue 'otor Will run or o eynchronoue
2onerotor, but, as n rule a syvc“ronoue wen rrtor will not
h ve an effective druninc device to prevent huntinr and will
not onernte satisfactorily_as a motor.

Probably the ex lanation of a synchronous rotor may
best he introfiuced bv first expleininv it fror e physicol

point of View. In the ordin'ry fnrr of polyphase eitern tore,

the rotor will Cunsiet of a crown of iron cores with

salient poles excited by coih receiving”? direct current

from a separate cxciter. The stator will consiwt of a
circular core of laminrted iron bovine some induced windings
placed in slots in such a manner that the wires in success-
ive slots shall hove alternating current of different phase
passing through them. If a four pols six ntase finchine is
considered, with three slots per pole, the rirss in the six
slots which cover two poles of the stator, as re follow
along the periphery of the latter, will heve passive .hrough
them, six currents which are out of phase with respect to

each other by one sixth of a neriod.

INDUCED

 

It will be seen that at every one sixth of a period
the currents in the stator resume the eewe values, but the
later are displaced one sixth of the r*idth of a double
field (3 poles) in the direction in which the currents
succeed each other alone the stator. Therefore, the axes
radiating from the mannetic field produced by the windinps
of the stator displace themselves around this stator with
an angular velocity.

CK =29, =___.—-—°277
P PT
Where T 8 tine of alternetiwn of current, P 2 No. of poles.
lThe magnetic strength of theme fields Can he considered
practiCelly constant inasmuch as it also resumes the save
value every one sixth of a period. Therefore even though
the st tor is stationary, the result is the sane as if it
had revolving poles which attract or repel the poles of the
field, and we may reason as if we were dealing with the
attraction of two systems of magnets presenting the same

number of poles whic? are alternately north and south in

polarity.

 

The poles of unlike polarity attract each other; the
othen repel each other. If the external K‘svrnete herein to
rotate slowly they will drafi the armature TWith them due to
the fact thrt poles will tend to remain Opposite of poles of
unlike polarity. This same effect may be obtained by supuly—
ing alternating current to the etetor minding; however, it
must be understood thvt the or eture rust cove up to Speed
or he locked into step with the revolvine field supnlied by
A. C.

This at once briefs up the question of stability of
synchronous r"otors. flkr 7(5/4f‘5 10'2'1

As with many other technical subjects, one way be able
to explain the physical action of a machine yet heve a very
incomplete knowledge of its analytiCnl theory and fundnhent-
al equations which enter into calculations connected with
the solvinr of problems concerning that particular rachi e.
With this in mind 3 few of the were sinnle and fundeeentrl
f cts of a synchronous motor will he analized.

From the following figure, enpnose RA and ER are said

to be in synchronism.

 

From an external standpoint E; and EB are in exact
synchronism and may be represented by a sine save, both
curves falling on the s~re points. But if the circuit
is opened and viewed internally, 3A and EB would be found
to be opoosite end micht then be represented by two sine
waves, one displaced with respect to the other, by 180°.
Nov take the prime mover off of B and its voltage vector

rotates in a clockwise direction.as shown in the following

figure.

 

The amount of load on EB determines how far the vector
will rotate and may best he explained by referring to a
direct current motor.

It is common knowledge that current taken by a direct

current motor is equal to V" EA : I; where v.3 impressed

ra *
voltage, EA 3 induced armature voltage or back E. V. F.,
and r313 armature resistance. If a load is ap lied the

rotor slows down and decreases E‘. It will continue to de-

crease in speed until the current Yes incrensed sufficiently
to celry the load. The theoretiC*1 llTit of load own be
readily s‘own to he reached when EA - Ia r9 = % v. Thus
it is seen that a ditect current motor adjusts itself to
a change in load by chenrins its speed, that is, with con-
stant excitation.

A sync ronous rotor rust run at synch wnous speed; it
cannot c snee its averure speed to accomodste itself to a
change in losd or excitation. ‘The current t ken by e syn-

- o
chronous “otor is equal to Ia - V" Ea . Where 3 is

2s
the synchronous inoednnce V = the impressed voltace. 3A0:

8

the renersted voltafie.

For n yiven escitation Ea' is fixed in maflnitude, but
its phase relfitian with rosnect to V ray change and alter
the cur ent as may be eexn by reference to the vector dia-
gram. Therefore, a syncnronous rotor accosted tee itself
to 3 Chan e in lard by Chen ice the ntsse of its_~ener2tor
veltefi vith respect to the vnltnge i pressed across its
ter inn 3. Its over: e Speed does not chairs, but its
instantanec 9 speed cfinnyes lon" evou h to pervit the
re mired change in these to take plnce.

Referring back to the vector diprrnm it ray be assured
th.t EA is const’nt and ufi" Le t ken as the reference vector.
Then E: = EA e 30.

Supfiose Eb 18 Cenrtznt in eftective vrlue but 3 13

0

variable. Then EB :'EB (-cos B + j sin n).

The resultant veltege cetsi.w the current is the vector sum

between the irnressed volts 9 EA and the induced voltage

EB .

Therefore go 3 EA 4 En

(EA 4 30) 4 EB (-0063 4 3 sin B)

3 E0 (cos ¢ + 3 sin f)

 

0
E0 - E0 4 3E5 .

So now the our ent flovinv in the loan and ~otor 18

To 3 Bo : EA - EB cos B { 3BR sin R

8100:)

 

r10”? * ixloop.

9° 3 1 § 31' '3 meter Current.

As in any Circuit the ‘otor mower 19 equal to the Droflhct

of th, real parts of the current and the voltage plus the

pr duct of the imaginrry prrts of the o rrent and the voltage.
Therefore in this case the notor voeer

Pp a -1EB COBB f i'ER sin B.

Likewiee the generator POW¢T Pr 3 13A + O.
' 0
Therefore the losses 3 P5 - P?

ITU"TI"G-
In port of t’ie éiscnesion reference has been node to
the instantaneous chants of speed viich takes niece in a
rotor when the phase relntion between the venerated 3nd im-
pressed volts 6 chanves so thrt the voter may assuwe wore
load. When this action takes place, the rotor way over-

run and r'evelOTJe too Fuch power. It will then sweed Up and

may again over-run, thus derelooirr too little t0*er.

his phenovena is Colled huntinn end ell nnchinvs in
which a char 8 of Iced is nccovnenied by a clan e in phase
are subject to this action. It is due lfrrely to the feet
that the Motor tries to assure rore load hy a change in
speed and the inertia of_the revolvinr o rts do not respond
to the chenee in electrical inmut. Nevertheless s stall
auount of huntinr sust sl eye ale “lace when a load on
a synchronous rotor is chanted,hut, with a pronerly desivned
motor onerating unfler hood conflitiens,'it should he s ~11
end not noticeable.

DA’PIPG
Two of the most com on rays of -irinishinv lustinw is

1..

by increasing- he noment of irertia of the rotor r sodinn
a flywheel, and h' usinw e s'ort circuited 10w resietrnce
winding placed in the sole fees. Such s "indies is ‘no n
as a carping or anortiseeur windinw.

T‘is windin~ hes no effect on the oner’tion of the
machine as lonw 's the enchine is not tuntins rno the rrwe-

Q

ture reaction is fixed in space nhase "itr ressect t3 ihe

u}

poles. When, however, huntinr starts, the srm'tnre resction
sweeps back and Forth across the pole fsce end ”a ping wind-
ing. The f1”x.CUtt1“W the fleesine winfiinh influoes n volt-

rge which nroduces a current in such a eirsction "c to opnose

the chonwe in anrulsr velocity. thus its sctiwn is si“ilsr

to the fiction a viscous fluid has on n penaulnm.
”9r"crc or swin?*"n

Besides heins of VFIUC for its ds'nine chrrvctoristics

 

alone, an a ortisseur viufiini is of r'lve in starting a

syn Tronous wotor. When the avertisecur ”indin? is arse use
of in st-rtino, the i nressed volts e should he re some
throufih a cohpenswtor or from tr nsforwer connections.

Sonetiwes the effiy current and hysteresis levees in
the pole faces caused by the revol"inq field set us by the
armature reaction of a polyphnse rotor will nroenee s
stcrting torque ”his? may cause the rotor to st rt without
the a“ortisseur ninfiint. Homev r, the torque produced
withwut the windinf wonle be small and excesrive current
would he required.

Also high volts 8 would be induced in the field rinfline
daring stsrtiny due to the firm ture reactiin flux sweep-
inr across the mole faces. This effect is s FaXlKU' ct
zero sored ens zero rhea s notronous speed is r*sohed,
but, in any case extra field i.sulfti n ehvuld he gratified
on all self stertinm sync ronous rotors. Short circuiting
the fielfl siniinfi rill rofiuce the volts e 'ndueefl in it
during starting fnfi rill slirfitly increase the startle?
torque.

Both of the stove methods re uire soecial chersot r-
istics vhich a e very seldom present in a nocs'ne desirned
for a synoTIQnous ~en4retor, end run as a svnclronous ‘otor.

Thus vh re 3. C. is svsilnhle, the motor nay be bronyht
up to synchronous sosed 1y its exciter. Or, in sore eases

special auxiliary rotors rry he used.

023

1-v-nr*-*\fin rat?! 7§-*-,'-"s"’~.”~~ ....
‘ a; . -L) 'v1' 1. - u: .. 1:

As tee Leen st ted, toie wotor xefieretor set hoe

p—J

been in the loboretorr ovly a efort tine 3*“ no terte To
been taken an to the tine tbie tent "we etrrtefl. Uofier
the- e Ciro stances the nest logic 1 test 8e e ed to 5e one
of det r inine the wirinw eie¢rnv of the set. This “is
accoerliehed by the are of 3 tell in connection with a
tale 3‘31 :51 1'18 91' 83310 to 0

After deter initr the on? n: cti~n die row of the set,
a static test woe mafia by the use of a negohver. Tests
ezre wefle hetmeew all e rte of the w chine W'ich nge suppos-

ed and should be ineul ted from each other. (A hrr to her
but c~re 're telen in uuttior half volta e on the vr‘ooure

The 18?t to t unze: when “we re iqt..eo rc;:u e eats
of all circuits 3&3 pfrts O- Cireoi*3 tl.t were co t ed
ithin the set. At this stage CifTioultiee were coconut red
in getting consistent raeults and one 13 1W-eéiwtely i:oreee—
ed by the fact th2t re eietfioo as spoken of in the class—

reom, is not elroye Cosy to obtain.

The first trials wo_e tgken by the "drop of potential
:«etuod" Due t3 rater defects all rexéi nfe were ceire :oted
from a Calibrati'n curve but consistentr reou 1t: could not

be obtained on t 098 reeiotenoe regentetents wfiope values

"ere very small. The ”:Vegtct:n3 bridge met'oo" was finally

 

used and matisfpctory rewnltc more chiminel. It v03 found
that fihe small vnluagt ken hy the fron of motenfipl rrf‘od
were in eTTOI hy 2537 to 430”)aho“irfi That thin vct‘ofl a? uld
not be used when re"1rTle r cults :re éésired. C?re “rs
taken to Luke @035 contacts With all cite its or ” Its of
circuits Peiar rcrsured. The iwpartnnce of t‘is vrecrntifln
V23 ewphrsized wlen rficifitaficc fawnurCVQnts were 1-59 an the
siip Tifi'E. Wit7~ut Céfiéin" tfie C r‘nn fill: C‘ the con-
1 ctin? rurfno: CT ffae of the rln‘ thw rfini t roe w:s
found to ny*rosch 1vf1“ity. fifter 9 “din“ the surf? 9 "nd
Ifiichilfi a rot‘lic surfaCO, the res ¢tnvce v“s found to be

'1 ' f‘

BCfDLG any fart? r fiesta cowl? Fe ‘vda 3 ratios Ox

H-
“ 3
H-
‘
I
‘
{'4'
Q)
t)
0

eyficlren C. rotor with thé ‘2’ volt C"fi US RUD‘ly
had t3 he Betarvinn&. The D. G. orcit r “0. .fTPSO ”“8
driven rs h rain: to Frifi" the set Ufi t2 Cd"¢@

switchifi? or Cnvtrol e; irrent “59 “rag nt in th? léfinrftmry,

p . 5 a. D p
a iour point face pflatg fiyfig gtrftigy r-

l.
p+
t.)
c+
l 1‘
\ J
O
C+
C)
H
O
f‘ 3
:5
.J

3?
3
c+
C)
H

%
[D

‘J

I
"I
G}
:1

in the l’fie convcote,
in the lire so Bare iflcn of t*e lccfi ca 15 1we nktr‘mefi. It
“”8 founfl th"t the eyeit r E;3 re vsry unst231e 9t tFe 1536

118088

(0

-ry to “rive the Git uw t3 pnéed. T“is instability
mas due to the f at thwt t%c CH”‘U1ft1VQ wa*ound rearratnr

:‘1 .‘ "- . " ' t ‘- 4 ‘p P 3‘ F \-. ' . ’ ~-\ A Q—- ,, _‘, - ’- ’.
as fvtllfi 39 a LL4lcrgnti.l C¢r_nunfl tutor «a» = 9 rJ.J-u

C”? ent th€03¥. In $11 Cnses 1t W nlfl firs" a Our? fit which

fluxuntefl tn thfi ax Sit tfi fl“?fi tfifi cit‘nit brfé’cr° in the

line. It one case the otor start‘d in are Piractign :nfl

 

then reversofi, it tho rocntiro C: find an excoeeive current

and ooenihv the 01:0 it Brockors lo the line.

"D
r *-
Ha
‘
I
. ..J
7)
,4
”‘6
4-1)
1
4.
7.!
..M
- J
(‘3
N
'. |
:m
-‘-"i
"‘5
Ho
3".
H"
....»
(3
03

In orérr to fi¥?TCh*
the line to the votér v-s connoc:;5 bet~een the 391193 field
{no arfiwture t‘un ooerotitfi it as 3 o5ufit rotor. Vith this
convecti\o soeod “os readily obtained Ev oooratinr t”e 'otor

fit)

at 3““roziwately 3fiv anfl e warts with tho 9ynu*rnoous
rotor “enfiratifif n vojtfige 9uit7518 for syno3roniriwv.

The synchronvus “otor "we soparately exoitaé on start-
inq but P701tagifio v53 o‘toinofi fro" tho ?.C. exciter Po.
*Cfifi50 thyonrh the mafium 0’ a t"0 pole d able throw switch
vGoon the A. C. rotor h‘fl been sy“c r :ized. Synchro”1:inp
“we aocorpliekod “y the use of two 532 Tolt raters Con ecté

1

ad in stroirht hntwern the 770 volt anions rho the A. C.
rotor. Co*e '"Q exoroieod io k'vin' too phone rot tion
such as to be fovorere to tho fisoctiia of rot tion naused
by the D. C. exoitwr or r~ti“? as a s not rotor.

Imro61*tely uvon rynsfirtnizing, tho line 5 itok to the
D. C. Exciter no. 433950 V-S ooeova to: thB flow lo LhIOT,
double pole switcfi in tho ficlfl cilcuit 01 the A. C. syn—
chraoaus rotor "“s'ooor-tcd so t“:t tflo E. C. :xoitor so.
433850 was now functioninr as 3 cu‘ ulwtive coryouufl oner-
otnr. Core "19 noofi ot t‘is point in rakiru sure that the
polarity of the D. C. excitsr No. 443239 was tie erwe as
that of tho aeravotc excitttian to the a. C. motor. The
excitatioo of the A. C. motwr “we on tyollcd from tyis stage,
by yorvio¢ the voltt'e no tFe 2. C. exciter by iooertinr

resftgnce in the fislfl of that r:chine.

 

'Eurin' tin? tavting 07‘1?N3 3; it was iinnt?‘tn't the
SF 0%: fivns "otor huntod to tie oxtent thot it T"."'.az,"Il.:‘ not
stay "in ft33" who} th3 Vqu‘niC l u)umli*w be? a n tho
A. C. synunr mile “otor anf th: L. 3. 2133? genor'tor ”'8

:21". " '1 . " ‘ "I. f ' t . 1 J ~" .' ’ '~" ... I. . .f'v ‘ .' . ‘ ' V... " "u i, .1
(.1934‘31151‘3K) “6‘1. LL33 3Y1.T]' I X?! 1,111. Li’r)-1 .1119. SOL;::' ‘ 1"-..‘r‘ 5‘15..." 6

q
I

i? tlst the refucefl EfiSG compel by fiisc:nnwctiof tho
Izac‘ni_n-"-:': {I‘fzr'r 21-73301 other, reii’zmi’ed the irfirtia of 'tl'm‘refiolv-
1&9 part 53 thrt too lantinfi tenfiéncy F38 not GQWEGG out.
fi-?ouo tho o ova ret oi of gyncbrooizin* ”-s atte oted
the bot "39 st Itod 1y ut low 110 volts A. C. on the syn-
chronous motor. To: field 193 short circ<itcd rod the out

stfirtafi flit? ho A. C. :otor onurrti‘j as an infinutian notor.

.,
W
‘.

3’6 0-313? 117.8 ‘

...“
'1'.
y.
r a
’L

a nsximnr Sp??d of $33 3. P. F. aye A. a,
'yronoua notwr ”~s tfon 'ncr aged to 32
volt: but the soicfl stayoo constant at 600 R. P. T. vfiile
tle our cat Gofiilud. To an oters YUIG plane} 1. tha u. G.
ane but 20 a 32:3 fun; wire v-o blown on tho CSOQ Volt aide
of tho ‘t:-.-x.~'~.:r'?‘or:fl ‘3. It r:3 69:31:”; that the synoizronms

note: 61? not hrvc Load at Itinw thra4t3ristics so tTis

LEE-t 0d '7" f 3 aha? 21-.‘?i31?t’3d o

F“)

a § (3 " - . .. 9‘ 'l‘..- 3“ ('-:'.-g"‘, |"_~~a alt.‘ -“"{ ‘1’".‘1'. ~p,»-n~‘- if: "-
£38 UJJAI . 4-,. yum 0";L'..J-&4'. .Al IRAS L- oi. .LsJJ. J. m

”'0

the set, the no 1649 saturation uni load voltm e tost 0'
:32. Care “48 titan t) adjust the ex-
citatioo o? the Sync rousus rotor 50 Lh t the power factor
would be most unity. All *ruawes were seated ¢nJ rowed

so tb-t black computzti n M's ooorosonod.

At this tiro it was noted tkrt Dflc fie rirg TPS ha ting'

 

and more attectivo ”"9 “’13 to wot+io“ the Vnchine cxnctly
level; This "we cccowolichd hv nwttirr a “c“doo voflre
un‘er one carrot of tho fr" 0.

Inriv' the lc~a tart o? cxoi' r ”o. 3375 , it '58
foun‘ th*t the rfit‘d current of 18 avoercs "as too hi fi,pnd
from the evooriccce 0‘ run in“ the tents it hos bcon flocidod
tiart vro‘aw‘f-ly a current ofe r» mores is rore n'-r-rlv the
octusl Cocrcity.

”tile run 1r“ tkc ho 10:6 estorrtion toot, the fiald
cox-ert "'9 roflnned fro" a waxirwr to a minirnm value and
Core "29 takcn not to normit the current to rice o ove its
lc“ect "clwe at cry tire; the reason heinv to elirir re

rrehrlnrities in tho carve due to hyetoreois ohcnoocno.

A'lo d voltq e toot anfi no lccd saturation toot ““9
elqo rcfc on the 240? volt fircct cnr'cnt vnnorntar ”o. 43
701. Pofore birh voltfife W09 wcnorctod tto frawe of tro
rackinc “rd ore ciao of the line ”99 “roundod as c rrcocution.
t cinst 9*ook.

The lo~d ncccnowrv for tho lord volts e tact r"9 ob-
tained h" conhe’ inr to o'votor corral” rrcostrt. Tho
rheogtat concictofl of a 15 V911“n carthcn crock tilllrw1 with
cle I too "fitcr. The olcotrnfleo completed of iron r048 of
.3/16” dioncter cod wore hcld in n rihid oooitinn by brim"
ECChIVI? f stone? to 3 fl" hoard rt tho too. The nioctrcflcs
"wre pl ccfl 11" ccnrt. ”o artificial moans rare 9 plovnd to
Cool the rotor as tho 109% was rot on for cry 'rfi't lor‘th

Of ti“e. F3? ”“7 91trnflnfl covr"tiwn the ”her cl" P‘ohlfl be

larger and 1&3 c}Cc:rnCcs 31303; frIth»: anurt. This is
633 9C recess: ; due 13 {:3 3313. LorrcC abcut the che of
via/onf arcing which

’c‘aac (313311 0:65 “MAW PW 1.353313533. 3111: 3131 3
$130 accorpauicd by t’raring of *‘ter r ich 3:1-3 ‘ske 93:3
kini of a cover very ans~t :t*e:1uc.

Voltage #23 Hezsurcé rit' a 153 voit volt cter it
Connficti n wit~ ; Lultlzglle3*r 11039 wultiplying f ctwr 3:8
23. it 1113 1110 it '13 noted th"t tha «cnarntcr “-3

ovsrh:3tixfi "hen "3:13:33 ratefi cur1cnt of 7.4 a-p3r33. It

'1‘
..-
f.)
(D
(9
4
..J
r‘
O
....

13t 3332311" 0 ““vcrc° ”1'16 we vary HO"?

the truc capacity.

C)

13:13 33 t21e sy1ch1onzusrnotor cansist of a no load
saturation test, V curve test, 333 3 c o1t circuit t-?. st.
The no 1035 33tur3tlou tast r33 run usiwv excitcr T3. 433‘;.I
as otive pcvcr em; 6111913 v cxc iti * the Lynch~omous rotor.

Due to 1‘3 E13 mi 1 char 3 eristi 30f the rotor, it 333
very hg'1r5 to obtain accurate reaflirxs for the load V31t? 8
test. The 0413 ray 3 Current reafiiny Conld be obtained “as
by mp r321: ting a ream value of thxt pwrt 0: t3: scale
traversed by the rater needle. In tTis test tke 3ynchronous
uctor * 3 133633 Ly the D. 3. generator U3. 431701 rzicu in
turn =33 larded on the ”Watcr barrel" rheostat.

The D. C. excitsr 33. 459850 oner'tiAg as a SLULt ctcr
1:3 3:31 for native pawgr for the afort circuit be t. 133
phas33 wcra sunrtcd throu h 33 am etcr 32C the field cwrrent
r33 rai3ed to 33cm 3 v;1uc so 33 to 513‘ a sfiort circuit

current sliqxtly a CV: t..t of 1“; full loam rztlna. Th3

ficli current 3-3 gradually decreased to zero.

“he tests wLio; cgurux.f tho wort tine of any oth er
iuCiViCu“1 tc*t “38 :La ratarf tint run to Cetfir‘ine the
losses of the oft. Roz r‘l thtofis o” Cct'rpjgiu‘ tho losses
of the set “3 e c no‘c-.od ms t 33rzrvl wa‘ors 1333 the

l

Iet;rdttion yet 0Q 3113 scat fe3sible. Eurinn this tovt,

w
fl
3
3
3

different trfi ucs op ciunt field cur;ent wer-
39;3C "‘3 run above 1233 R. F. :. rowcr “as take: of 'the
sct,'w it r38 allowcfi to “J c to a stzo 31113 irstnntrncoua
Byted "*8 road 3 cry 5 £30. In 3313 33363 it ”‘c 13333
sufficient to tflzc rcgdisgs only CVLry 10 £33. With this

'13 fislfl on; on; the power inuut 3t 3118 83383 Below 1900

C“?

11'. P. “., 11:2.8 Lil-7:181}.

The ruove tee oula ~ive the core loss due to that
field ou;.ent 3133 tuo in m1 8 and friction of the totrl
sot. The £1313 co; eat 1:3 re ucei in 31338 t1 zero rith
a c;mulete set of Valu 9 being t ken for each new current.
1116 111-31; hat on 3307‘: 1: 331-1138 (3 'oais'taiz-C of raisizgsx tho
Lrushos Tltn a zero fioLI cgrrcnt xvi t Linc re: 13 3 38
Bu; ested. ihc :IOVC procegore r33 Ca;iied out itu LTCh
it1z‘ividu'11 1230221113 31111 t‘.1-‘ data 01.11331 :33 rakes 1t pos lilo
to sex) I t3 the core loss and brush friction of each rochine.
E0 tart “as mace to 33 érflté the windxg° frim thfi beariz
loss.

'13 oiéar to rcaeure the instafitaneous speed 3 D. C.

an electric fvn rotor. Pre-

*‘3
91'

thrd

(3

tactowetar <us c fist;
li$1lafj runs were Hflie to deter 1:3 the value of field

culleht rud voltage best suit ior the “articulor 3123 of

motor we were usiwv as a vnnvrctor. It ““9 found can-
venient to wake the field current of the oriwiwal fvn rotor,
of such a v:lne so t¥bt the Urltn e renvr ted Would re-d
directly 3 l/lOOof tfrze actual awed of the set. Incieent-
ally this rrve nFnrly full serlc deflection on a 15 vvlt

voltwetfir.

comm-non: 9136mm.

 

 

 

   
 

!

' Qatm'c'rxon DIAGRAM FOP. n.c. cmmyron 3:0. 434701.

J .

 

 

X. Shunt Field. I '

 

 

    

 

 

 

 

Intsrpole <' ,:,
*W
80?. I ' . .

 

 

 

. ' ‘.
 W
3. .
. . .
.‘l E.
(arm:

.754h
!

 

 

 

 

 

. 3" Excited by D.C. excite: NO. 435851.
'(S;F,- Series field.

9
.u= .A’Ea— 24©O volts Doc-

 

f_.

P
1""
t

' ‘

     
      

.
9m.

mmrm DIA RAT FOR mo. *xétm no. 43.3951.

 

 

 

 

 

to

 

 

 

 

 

 

 

5. §.- Series field.
| c

”‘1‘“‘312. - Shunt field.
. .

.

Laad --F191d of D.C. generator NO. 434701.

   

"UQHEPTIOH “IAZR A” FOR D.C.TXCITER YO. 433850.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

‘ $9.5" air 1-- 8 f1 91d. 0.. St. —‘..=-- CE?) ‘ ‘3..n:§.’1‘lj‘§ a
‘hm. ..— qh'd‘nt f1 l\\i' .

Plaid of fifinchrbhflfia mdtqi 00233

TABULATED DATA.

(“‘3‘
‘\.\

D. C.

D. 0.

‘OC.

D.C.

¢?é

Name Flare Data
Generator No. n33¢5o.
Tvne H? ..h - 2} - 1200 Form n.
Vslta no load 125. } Full 105d 125.
Amperea 18. P.P.fi. 1200.

Generator No. #33351.
Type HP - h - 2% - 1200 Form P.
Volta no 10a1 1?". Full load 125.

'lmheres 1?. 9.”.V. 1200.

Motor No. 68H627.

Tvpo lTB - 6 - 13.3 - 1200 'Fovfi 6.

K.W. 12 R.P.E. - 1200 P.F. - .9
Amperes 35. Volts full load 220.

Genarntor No. 434701.

DLC - h Form A COFPOHni winiing.
*lmperea 7.H Volts 2100.
H.P. 19 R.P.V. 1200.

‘ Note the chwnfia rBCOmmenia* 1n the discussion.

All machines wanufacturei by General Electric Cfiwpany.

Static Tests.(insulation resistance)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13.0.. Excite-r Re. 263851. Rgaiatanog.
Between shunt field and frame A — — A—Infinity.
Between series field and frame—A _ : s
Between brush and frame ;: _~_ — . s
Entrees brush and. armature eoreM _- I
Between.series and shunt field w— A s

0.0. Exciter No. 433850.

Between shunt field and frame =- w A :—__ I
Between series field and frame - A _; I
Between brush and frame - — — I
Between brush nni armature core * — I
Between series and shunt fields - —— I
A.C. Motor No. 684627.
Between phase 1 and frame -- ~ w I
Petween phase 2 and frsre - ——_ _ I
Between phase 3 anl frame -* AA_* I
Between slip rines -: _- I
'Either slip rinr to frame --—~ —‘~: I
Between fieli uni “rnme - -—-= I
D.C. Generator M3E701.
Between series nnd shunt field -— — —— I
' Petween er#fiture winiine and armature core
Petween brush and frame - —_—+ -1 — —
Petween interrole windine enfl frame ---~
Between armature windinws —— — ~
Between either field winding and frame ---

 

 

¢?7

Circuit resistances.

Temperature at time of toet,70° F.

v.0. Generator No. ”33250.

 

 

 

 

 

 

 

 

 

 

 

§ Gircuit. Ohms resistance.
Stunt field.---—--------~---- ~~~~~~~~~~~~~~ $5.?
Series field.- ----- ------- --------------- .1w1
Connoundinq shunt.----------—---~-----—--- 1.12
Series field in parallel with shunt.---- '.109
Armature alone.~-~---~’—-----—é- ------ ’.517
Armature,brnshes‘&piq tails.:= *‘x— ~ -~: 1.365
Prushes & pig'tnils n10ne.-----—------- .ERS
D.C. generator No. #33551. '
Shunt field.—j——=:*-==-:=:— ~—**:= 2 -- 61.5
Series [1014.2 :-* ==* “— =2 ~** :-‘ .265
Armature elem»:w —-——- ;_, —«--~ = .52
Brushes a. pig: tails 8: len.is.--'------- . 92
D.C. Generator No. h3h70l.
Shunt £1.1e. _ -=;:*_—_ :_= A : 29.35
Ber ies field. —*-—-——~— 2 -==-- 79-)
Armature neer A.O. motor.— —- —~=—:~—=“‘ = 3.73
armature near generator No. h33£51.---~ 3.71
Brushes & Leads—~A.C. motor end.--------— ._
Brushes & leads o-exciter end. ------- --.-- .76
Interpcles-=- . —~— ~=~=- " =-—=— ~— 1.3%
8.0. Synchronous motor No. 63h627.
Rotating field— - —*=-— — -- : — 12.2
Brushes, pig tails & 1eads.- — -—= : - 2.3
Statoro- per phese.—£jfil——- *’ —-“~— * —- .063

Circuit resistances.

Temperature qt'tice of tost,70° F.

D.C. Generator Ho. M3330.

 

 

 

 

 

 

 

 

 

 

c...

\x xi:

Oircuit. Ohms resistance.
Shunt field.---------—~~-——--—--~~«-----~- #5.?
series field.-—-—-----~--- --------------- .171
ccmroundine shunt.----- ------------------- 1.1g
Series field in Parallel with shunt.-—-- '.159
Armature alone.—-~---~'-----~ --------- .517
Armature,brushes,&pir toils.-~------ 1.365
Drushes & pig'tn ls alone.~--~-—------- .538
n.0. Generator No. £33551.
Shunt field.:.lw :-—:- :w‘:———A:—: ~:-- 81.)
Series Iield.=- :-- —=:— ‘— ——-~~-:‘**——== .265
Armature alone.w — -—:—- —- —— w:-:—-- A: .52
Brushes a. pig tails e 1en_;3.s.--—------ . 92
D.O. Generator Ho. u3u701.
Shunt field. e =—-=;—: -— ~~= =—~— ~ 29.35
Ber ies field. —=——-— :_ 2 ~ =—== 79.3
Armature neer A.C. motor. _ ~=~==——-* 3.7“
Armature near generator No. u33251.--—- 3.71
Brushes & Leeis-A.C. rotor end.------~-4 .2
Brushes & leads --exciter end. ------- --- .76
Interpcles“: . w __=_=_ _W:__i_ 1.3%
1.0. Synchronous motor No. 62%627.
Rotating field----=-— — ————— — —*~— 12.2
Brushes. pig tails & 1esds.=-:* = = A M 2.3
Btetor- per phase.—£gfil‘~- — *:—-*— *-:-~ .063

son

an
127

117

"1

so Loafl Saturation Tests.

D. C. Exciter 9.09 Exoiter..

ID. 435850. “0.. 433851.
terminal 11816 Terminnl Field
Vclte. ' Current ‘ Volts. current.
138 1..91 1:4. 5 1. 75
137 1..56 lFG 1.54
117 1..3e 110 1. es
104. 5 1. 24 105 1.24

9? 1..16 95.5 1.13
91 ‘
91 1..08 85 1.01
80 ..91 71.5 . 76
ea ..73 ea . ee
55 ..e 51 . re
‘0 ..53 4 . . .8
4.0 . 40 '1? . 30
35 . £34 2"") .313
31 . 19 1'} . '3
a . co 4 . no

D.C. Generator No. 434701.

Terri. in“ 1 Field 'Ierrr. final Field

Volts. Current. Volta. current.
275/: ’ :- .1 1 >90 47. h
2570 ' 1.3 11.c 1.9
Base 5.8 sec 1.57
2023 3.3 sec 1.;
1760“ 2.85 330 .7

d??

 

 

 

m . . . ~
1 _ . .- .. _
. , 0
. _ , H . . . ,. . - . .
"...55 .u .u . .. .us (1.. .wil .01.'1II...2 0.... e .A .. l . . . . . . . D—
. — .
. . ¢ v
. u 1 .
.. , . . 1 1. . ---? .. .... .. : .. - . . . r .
w . . .“ ... .. 0 ”~x _.q... ' . . _ _ .. .«
~ .” .... _. . .. W .. ..- _ . . -
. i
n .1 . o .w . p m . . . . . /0 w
. . . u. . . .. . e
r o I ... ._ a...l.' . v 'ulvfi i -A.F. . 0.15 \elin: ..IL, ...\."|.ll . ...... e'1.1.. . 4. o e t 4 I 1 ..e ..' n 1.. I. I.-I.
. . . _. . . 1.
. m. .. . L . w
m . .1 .0 1 , . .5.
. 13).. _ 5 . . .. N
”U 3 E _ . M
7 . .13 3 7- . - .... _
. _ n “1/. 1.. . .u w
. . 0: ...u. h... _ . . .. _ .
. i _ . u . .
- ., . .. . . .. . .. ..
_ t _. . _ f L... n
. . I .1}, 1.-...nVoE0i... .. “I :1.-. t? 9-3.31-3: . b
r .Nsm N4 . .1 up .
. VJ _ . _ .k ... . .
.3 . . . ... “. .M
q t Mr I . . ._. _. _.M. ..
M. . ,3 1.0 O w H_..J. _ .
. .. .. . .3 T...» t ... . .011-.1.. _
. .31 a M .m .
... 4%. “r ,I ” .....,. .M
.. .0“ 04 ~ . 1. ,_
_. . .. fl. .
...: 3:0.”n n. k: ““1
3.12.9.1 4.0 the? 1 ..- -. I»-.- 1.1.- . x
H n—v :U G .H. 1, ~ .
.... . . . . . ._ .
I . n , . . o . . .
.-v ... ... H N O O H . ... ”MT .
7 ., o s. M , . 4H. 2.1
“ Hm ._ M ..
a. . . . M
_ . . w. .M
. .
..

 

 

 

O 0 0 0
a». K? Lu. 9.

120
100

o .n... HUM. HirenhfiHHHDU

 

.IHIGAW STATE COLLEGE

 

 

   
  
 

.- r- . - --.- T — r' '
. _ ALLZ_4 :1 LLLll'I- ‘I 13'
cot-.... ‘4 A‘VA 5.4 H
7‘, v .-. v ~ V. r
- .v _ ..4...,.-.;. -' 'TIfi‘ ."_ _. o. k. . .—.—.JbJ-o{,~tgL. ‘¢!.¢‘,. . .LT‘-‘
r» - . .7. 1- ‘wu'o. ‘ 0 ..- ‘go. _.; o _ ‘ “

- # - - < -‘ ’Hf—OHMP w. "opquL.-
.. . 1._---‘ .. _.-.«;;I'y- H—aq-o— w-fi‘yo
..-.o l ... ---. ... wo—I-o-u-y—o“-c—4

. - .-. ...:‘d -‘~-J %— 0...qu

| ---.._.-.M.._. ‘ ‘ ‘
. ....-.”
9 A--.—..L-__--- > ME
—v A‘

 

 

 

 
    
   
     
     
      

 

 

 

 

 

 

 

 

 

 

 

 

    
 
 

 

 

 

 

a
u
‘t
1
1
-U
T77
i.
,0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   

 

 

  

 

 

       
   
  

      

 

 
 

 

 

 

 

 

 

-O ’4‘. -‘
. m II I -..-i? o ..O— “ -... - _
- - _A A?! L’.“ tau-4 .. 9. -
- I ..-—‘H~ F4 ..L—O" 0-. . .—
..,r-2‘.......:._...,..- -- - 17‘ mad». L. LI ‘H .
. J-A Me‘L ' - A y—v-r ‘- —-4— w. .". I -. -
'1‘ 5"- ' . --".-; _-:«* m ._"9‘N-. ’ ‘V L. .HQ‘: «9“! -... .-.. n. 5
1., Jtum ‘ ' - a I ‘.--."'“""V" ‘03. >MH,_L——_-I 1:7 ; If A “ 1 '—‘f“.’ .4 - .-. _
' a d 0.0"r—V 6?: -4- ' ‘70'04 -o-'oa V‘ a :1- ‘ A) - ‘ '- - V. " ‘ " ' ‘ ‘
wk- *‘ L. 1 ,__. ".2" 1"?" ’ "1‘ ’
. o "‘ ‘ '
2800 3"“ - . . -..-.uzc .- . .. '
va—I‘ vflz‘r - - .
. o ...—o .. .7 _
......h -.‘fi.-. . ..t.’ .. .7- -
‘é -yflq'uw . v
- “ML oi—H- v - --
, 3:. ~21} ...v . 1 ,. -
:4 ‘ ‘fi ‘17. - I ‘OOO D... u
_ ,. " . v ’0 .-. - .... t.._.
r._. I.- I -0 -... -
i J . 1-|o~l .1 ’ '
Afi - . 0—- 9. - -.-
1 _ ‘v .5 ‘-5 ‘ _
IVYLAH Yno-‘v‘ ~0—
L‘A‘Y ‘ w‘?‘ -' ¢ --
A T >'¢-—.~ v -‘~o? ~
. .-..‘g .-- ..
‘ff’ ..- ,La ‘. <0-.
_L “4““ Qwfi ¢ 4 -
’ H W. ;; !-’-9 u I.
2 ”.....-L- .J ._ - . .1
. . A .7 7 <0..'\- * . - .
C' -Q - ’ o
‘Q‘l ' --- ’ y.
5.; §—* «tub-4 ., ‘.n - - .
A‘ - 6c -_ A ‘
:L% {3.1.2- ...... 1” ..
_ . ”4—5 9-.— — - V. 7 -
_. . . -b—:> v 0—. .
_ * Q .4 »- ‘ .- . _
_ I: ON I..— ,» —>¢~ at. v. o- o .
. l. "1 ... “mo-1‘1 w, ,-z- . .1.- .c
‘ fig .44 ' w-”-- .. .....-
. . ..+.% h;‘~: «otc'wof Of-o- ... .- ' - ‘ ‘
. o. .. ‘H 31’ n .2 "" ‘
-- -. - . .‘ 44lL‘...A r ‘ " I
o u - ..- .-...- [AVIYA -.. o—.- .
o :— - . : ,‘7. t ' 4-»- - . l
~ I -- .. -u u ' | -
9 1 1 1" M1? ,:-.. ._
O ._ w .1. c. r.-¢‘.—.,J. ! '-
— _-,_~~f“ ._7 1 .A ~46 -‘-.—s-: . o..
. - ‘QP m-‘g-.|~cs o>—~
c— - o .«u..,... ,‘fl ‘_‘ ‘ “' ' ‘ "‘
‘_ *o-~ . 9.9 A -
_ , 7 4 L1- .'. . ‘
I pr'.: ... ~‘ .
-o o ‘
..5... u
«- . A
‘-.~— ~ 0 o.
v-—‘ -
-..-
o-A -.
- 0 o l
r- '
1600 1 ' .
o i ,
{7 J . _
fl 1200 . 4
C '
t: ‘
Dc ‘
H '
«oy‘fluiofi’. 7.. o- ’1 .1-..’ ‘c‘. _‘. _.. ' ‘ § ‘ -—;-.‘- ‘ ‘ ‘-
_._‘~.‘_ » . L .'-\ 1 _. ° -‘ N "- ‘-Ov+—~o— -'O-.-A.¢—o.-... - .
a) . -....1441....;..v' - - ~-'- - -— ~J~ -. «- ~~ —'
E‘ - . -59}..- --»-b.---‘ .‘ . ‘ _ ‘ .I ‘ v ‘
. .. ..---wyfl.-_ . '
—-‘ A.-!-o.$..‘..-‘.‘.ul
. .. . c ...“.- 4— '..S
l"... Lt—V- '- o. c -1
a, 9. :”.~.‘_.... .5 -.Ic0
- -- o -. -'.‘.§.: L, '..
>4 .Y‘"- - . , . .‘J... . _ - "'
8 O ‘ “mu-.-..“ .. . , .- -1 *
- Mbflfi ~‘odu—br‘q'r afi-qu- 1*, Q‘- - A ‘ V ' '
.I. . - 2...--." ' ~o -
o . .- ;-- !.. 9 ‘ , I ' ' |
. -.- A-- ---...IJL. .
- -- 4 -- . ..A-L J O
—- v-.- _ iOLJ o '
- ~; . -Lp .
< ‘-- - o. *9 1 '
- . .Q‘- 3-.--
...: .o' .5 --
. , '1'.-.~‘O..-Ih -
-bo-;-——< "-‘ng .
- .... r-‘
...“ ~.‘~--.
J. . If]- .- “... ”...?
V -‘ 4‘-~ -w _ ~ - ‘
'00 """"' "353’ 0-»- .-
"- -' V—: .0 . -
-0 ‘. I o '
I
—. . -- -. I
. _. A.
_ I- -
_ 3
- ‘-
0

 

--. I
_.-‘ -
.- -.. U
.. .4 2
o‘ .
~—.—.. - o . o
5 .u‘ . .
-.- ‘ ---
-._ -!.» '
- o . l
.. . . I
._ ‘ -
... . .1 _
.-o'. . .-

 

 

 

Yo lnfii quwvw’finn

of s"ncbr050ns rota? N0.

Tarr1rn1

Q‘ort clrcnit tfiat 0’ q nc‘ronnwa motor “0.

Line

cur*ent.

h5.2
#2.5
38.7 .
3hu5
28.8
23.“
15.h
10.
5-75

Fifili

C" fiflcyrlt.
1

5.g4

h 7”

'0

”.3

1.1

0.09

V1011

nn’“r‘“L.

1.75
1.65
1.1.9
1.3
1.09
.85
..55
.35
.2

fi”EC¢7.

65u627.

 

 

 

 

 

   

 

 

" \—"~V;i‘ W'A '. L‘DLLETCE
o
" - - w ‘1' '- vvv ' ‘ Www p—o-‘ W W * ~v~
‘ - —.-o#v "" I . - ..¢ . . . . .}-. I. .4“ 9- .oo
-.-: . . I . . . -. , r... . . -..,”
. ..-J. . ‘ - . . . . . .. . , .....d. . . ..
. .- ...... ..-. -. » - . x ' - -- -.-.. -. 0 >0
l
A -.-.- 9 to. A .4 .1 s. . . . . . . , , .
..--.. t .-wu-.o. . 3 .. , 1 0 . It.
‘-. < » - i '91. -o o .. Q - , ; at. .- . .
. ...- .- s - - - . § ' o.
. -... -. .z . , . , .
- —-_. ' - - *—< 5‘- .--“-.. ~—. . . —___. — . - .4 _ . — -- ‘o..— 1 -..—o 7 — > — v- ...-..-
. . - ..-.~. .. . .. . . . I . . .
. - .-.-A ., » o . . 5 . ....
. - 7... .... o . . , -
- 3.. .- t. - .. '1 . . -
k . . . . . . -
.-. ... . .- ‘I . .
. . . . * . .. ,
. fimtiom ..-..__._. -..--¢- ...“..- -. -7..- .. ..-..-
. l .
. . , . .--, .. _._- . .. ...'. -. . I . .
.. -, - . - H4 .1 . . , .
5-. - . -. . . . - -- - .- - ' -
.. - t . l . i . I .-- ... . -
. .- - o 7 » -- .- . . >1 . _- ~.’ .
; . . . . .. i . .. 5 ..--I
I -- . - . I - .I .-.
l
. ... I . . .- ...
- , .- .... .. ---- - .- -+....I-—-..- .-‘uu-.-A~_,..,..-. .-
. ‘ _ .‘ . - .fi . . - . . - . i . -. . - .' ». - r’ u... . - t’ - b
...—o- I .I .-....‘.J . . ' .. o .. .- .. .. . .~.. . ‘ g I
[,1 I.. ..i -.- . -... .
».-. or —c ran . a .‘ .~ .-
'. .1... --.. ‘ . 1,.
to. .. .. » l. - .'. ‘ . ‘l ...- ..¢., . u
I . -7... -- .. -
, .
v o a» a—c—“m.. -.. ----
...-..a -. . ,
, . .
..¢.._,..L.._. . .A .
-.¢.~. '5'.» .L -P
1 - ., .. -. ..
.‘ ..1, , _
. p-“+o I c'qo 4
.Q- ...t kW-o¢.,
. .... -.....n- ...-
. .I -- | .
o ... .- v 7.
C' ...... ...-‘
. .. 1
... ‘
.... ..J..
.-..1.-- - 1. .-.
9 G ‘ * ..-, ,- .
, g--- -‘ ‘ +.~< .—
~J4 1F . u”: - .. ....
. .1... 1.4.-. - 15—"""““'
< ‘ I ..- c-6--~o onv ~
' t .- 7 -Q‘r~o¢-< ’n-¥> .
I. . . .. . .. ... .-..
. - '.- -... .. . , ,.+.-_- -
I - ' ‘- . .. . .... .. .oa ---
I" IV '1
- . . -... ...< . ..
‘ ; _ L; . .q .-‘..'-‘-oo.. -.. ,
A . — h—‘-v- .. oaou — 0 0 ~ ....- .4.‘ I-» 0-... .
a '."1 . .... ...-. ..--.H.1’Y .' -.
. -I-.. .. I. - --. 1-.. . .— .
, ’1.,,. . ..L .--...» ..-‘?...,.". -
... .L ”...--I. ...... ..I .-. I»
I ... - ... ..- .-. ..- . . ....
. ‘1 q 4. I..La. ... . v‘°' , . ...
I .
. - .. .. .. :° I y ,
I-..-.,.,..:a*1+1+o «I .... ...L , ~.
- . - 1.... - .. - . . -..-.' ..-, .~
0 300 . - M..- -111 mm ..
\ .< ,. . ..l ....‘4, ..‘y u . ..-
I -._ w .I.‘.._ . .. .---
A». ~ I I . 41I- . .. ~ -
. - .i... .. . .. _. . .. .
.- . .. p. ‘? .— .
- " 0.7 . . .3. r a b.
4 . _ l . -.. . . .. I .1...
-~ ...»- .— ’--. v 'Y‘ .1,
- I a». .1 . .. .. .¢
- - ...- .o — 7—.-.-.I‘ -A ... . v-- »‘_a— J — - c H . —« .
r V o -9 1‘
o— ; . . . .
Y 0 ~ . t‘ ”'- rq
- .. -.. - § . k . .t .4
., - ¢ ., . .. . O ' ' n
I A . - 1, , _..
I
... .. f . . . , . . .. ...,
‘ . - -. _. j ....I_ _ . , a, t‘
v - o~A—~ .c . ‘ ¢ .
4h 1% -.. .. ...... 1...”--- . ..-- ....L ..-- - “-..... -...
x} - . I . . .. . ... ...
5 < - ~ I . . . - .-- ... -
V ._ 1 . L. 9. .. .
' o o. . -| .—. 1‘ O o o
..1 1 .. . o . --
?. l ' .. .y I ... . - " o o .
- 2... . ,. — .t. 9 —Lo- — - o - o--. o .. -
. 9 1d,. -‘ » ..A.-. . - . o ~—
.' ...; . . .I.. .. . . . .‘. .I l. . .
._ - ~ -».. . +dh - ... --.-..- . -_ -.....V .—\---—o~— . - l - - ”.4 ‘4 A - T' - . -I . - w». .
g . I . - r . . .1 ...- . .- . . ~
I. .- . . 6:.- ¢ . - t -o . I m. -i-.. --.. L . o
Q" ' ‘Y , --.. . . _ . . ....n. 9. -—
. - . ; . .3 4 I. - 9- ’ . . ‘ v - .& .~
I . a . -. .- . _ . . ‘ § . .. ' . - .-
_ ‘P . . .t , - 1 I. . 2 _. ,.
7. fl . _ a _ . I . . ' I ._ . I .
, . ... .. - - . I . . -.
1 . a -..} . _ . . .. -.1_,
j/\ — BO . -.-- ..- flung”... ...». ..-... -... . .- -1 “...”. _.,..- ..--..... .. --.
(—0 I “I l A 4.. .., . .- - o .
. . 6.>- -~ . . A .
I . .5 . .. .. | _. q . .' .
. . -« o. ' o - I -- l 9.. , .-
. I
' - . . L -.p . . V - c 9'
._ ... o , . . -.' ._,- L t . . .
L. _ ..J. , . .I I . ‘
' . .. 1‘- a I -. . . . - - ,. -
a ‘: . I . .. . . , . 7 . ‘ — I .
. - ”-.-“- - ......» , - 1 - -.-- . - .- . _- w . ~. --. -- .
a
0
.\
P

, - (1. . . s . ,.-.. . . .
.30 80 . .....~ ..- . 1 .-.. . .... .... -....- ,. .-- 1..---.“ .....- ...-.....- --. -- ...-
\ .. - . . .. .. . .
I ‘I: ’ l ‘ ‘ ‘ 7 '*
" ,1. . I,t".‘. .' ' ‘ ..'I ' , .-
u- '. ... 9 o T - ‘ .... - -
. ftp . .‘ I“; 9 . ' .1 .' ' . .
. O -_ I. .. -... . 1 1 .. -.z -_
. . _ _ -- . . . . .
* ‘ ”‘Q' ' . ‘ . '“ 9'2““: 1’ “if?" "“"Z+T".’ “T‘f’T” “i “ ' ' ; _ -1
$4 . 3‘ .. ,4. .! .... I .. '. -- .' . ‘ » . ,
. o ‘Au ’. , . . .. . . ._ .. 4.. . .. ‘.‘ o
. .. .- . ._ . .. . ..., .... I -- - ...
. ~ . .. ‘ - br- } b..- - ‘ ~ ~ *- --
o .... -...,.‘.. - —— '— —.—4 0-. -.o - a {
é .- " .. .2.-T. .--. ... I ...- ,’ . o -
. , . - L . .-.. ..
10' 401 » ~ -~ ‘- - ..-". »-n.—-' - —L~.— mo. ..- .-.--.s-.———r-o~c'§ . —. -L——~.* ...—- .—
\ — - u v ->
a c , ' I o- .
... I . l ‘ L..... ,
. _ a . o 1». -.. - I o .i r '
' fi l I O
H I ' ' .. .

 

 

 

. . 7 I .
' -,.1 ..11 - ' ;:1; :. 1 . . - . - .
. I '
I_. I
. - .
V I
o 1 1 ' e a I. -
r V 4 I
' I ' Field amperaa, -
. § ' I""' _ I
’ f'. '- " "i "I 1' ' " T"‘ .
I ‘ O
. . T
l.-
. . .. ’
- - . ' ~ . \ 54. -— -.n—-. A A. . ‘ -- ...-o... ‘J—0 owoL-v — -- -... -

 

 

Load voltage tast.
D. C. Generator N0. M33950.

Series field shunted by entire shunt.

Terwinal ' Field LOnd
Volts. Current. Current.
122.5 1.63 22.2
123.5 1.6a 20.
125. 1.6h5 19.
126. 1.65 12.
126.5 1.65 17.1
127. 1.66~ 16.
129. 1.68 1k.
130. 1.69 13.2
130.05 1.7 11.9
131. 1.7 10.9
132. 1.71 9.5
133. 1.72 7.9
13%. 1.73 5.3
13u.5 1.7n 2.9.
13u.5 1.74 1-6
13u.5 1.7a 0.00

Load voltage test.

D. C. Generator NO. ”333500

Series field shunt tanned at center.

Terminal Field L02d
Volts. Current. Current.
122. 1.7 22.5
12h. 1.725 - 20.75
127. 1.605 18.
129. 1.79 17.
131.5 - 1.2.15 15.
13h. 1.85 13.2
137. 1.885 10.n5
138. 1.91 7.95
1H2. 1.95 5.7
lhu. 1.96 3.

1H6. 2.00 00 00

Loni voltase test.
D. C. Generator No. #33850.

Series field shunt removed.

Terminal Field
Volts. Current.
122.5 1M1
122.5 1.h1
122.5 1.h1
122.5 1.u1
122. 1.1
121. 1.39
118. 1.35
116. 1.32
109. ' 1.26
101. 1.13“

57-5

1.5

‘73?

Load
Curront.
2h.25
20.5
18.
16.1
13.6
11.6
8.8
6.8
h.2
2.
0.00

Terminal
varnn .

137
131
12k
103

93
3s
12

5

Load.v01taga tests.

0.0. Gonarator No. 131701.

Terminal
Volts.
2320
2360
2220
2h80
2520
2590
2500
2h20
2n60
2320

Load
Current.
7.1
5.9
“.95
3.9 5
2.95
1.95
1.5
1.00
.6
0.00

0.0. Ganerator No. #33851.

Field

Current.

.22
.20
.19
.16
.11
.06
.01
.005

Load

Current
7.95
6.5
5.6
n.55
3-15
1.20

.2

0.00

675’

l_)v‘ . 1 1' ‘L;

 

 

- “‘ “*3' .7“ ' ".‘IT‘f’fi‘fl"? """"‘.“.""_”""“""“.' ’ """.
Load-Volta? .ourvea. * ' '
0.0. Generate?“26.‘&33550:-
, _ V . i ‘
160 .1.and. 111 .1 .1-1111.111 -1
D.C. Ganérator No. 333851 -
' A . t 1 i '
1 9 ‘ ; 1, .f
1110 _- .- A , . 111...... -11, 1;. 111-11-- 1 1:11 -.1 V
v ‘ 2 f 7“ . 3 1 0 ‘
v I ‘ t ‘ ' .
... \\
120 2 « - : 1 -' 1‘“. 2-3 1 14 -

1.30   . 1 1.1. 1:111-.. 1.11.1.1..- .1 1- 1 .1. 1‘ . 1-1; .11.: .1- - -1 .
._ ‘19:“:33650' .Sarieajf1éli shunt tapped.
. - w {6 "24*u33350’* _Seriesflf1elfils$untéi by

:0 1... - . 1..1h.~antire.8hnnt..h

Q'\

I I l ’ i I v
+» . 3— #33850 Ser1es field not shun tsi.
0 . 1 ’ . . . ’ ' ‘ L ' 1 .
tk33g51“

- 1 .—

2- . 1‘4.
9’ I. : . 1......1. .
fl :0 ; 2 - , . — ~ L-~' -

Q ‘7 .

Q\
[-4

.90

 

 

(D4
#1:
m
H
Ix)
.111
U
u)

 

 

o
3

Loai—voltggs .62...

-. —..-.. 2- 1...

r

\

’ “can a

(C.

U

.562”N6:7232701.

. . 1.
1 1. .
u .

1 . d. 1 . 1
. . . . 1 .
1 . .1 * . . .8
.50. . I I I ..I.‘ . .I v
_ . .. 1 1
. . .
. . .
1 . 1 1 1
. 1 . . .
. . , . . .
. . . . 1 . . _ 1. .
. u. . _ .. . . F
o I». . I . $.9I» L . . II!
. 1 . 1. 1 . . . ..
. . 1 1 k 1
a .. — w .‘.
1 .. 1 .. 1
. 1 .. . .
. a 1 .. 1 1. . 1 1.
1 1 . . . 1 . 1
_ . 1 — u _ _ .1
. .1 1 1 _
. _~. 3*. 'o’.‘ t 1.0 9*. ..Is . 1 | m *. . la 111.6-
. s .. 1. .1 1 _ . . ..
.1 .. .1 . 1 . . 1. 1 .. .
. . . a. 1. . .
~ — _. ~ “ s V o .
. . .1"
1 _ . 1 1
. . fl .1 .— J. — .... .
a 1. . .. .. ,. - - I.
.. . _ . . h .
. . .u . 0 . u
. . 1 .. _ 1 u
1 1 1 . 1 . . . 1
n . . .. .. 1
. u , . a .
_. 1 1
. . a 1 _ . a .
1 . .1 . 1 1 _. 1 1 . .
t.» . .n b ~-r'., -Dv. :Oav‘l 10-! lb’ . o. .79 IA: . 0 it 4
1 ..
. .1 _ . . 1 . .
. 1 1 . .... . . . 1 .
1 .1 .. . . . 1 . 1 1
_ 1 .. 1 A. _ . 1 .
. 1 .1 1. .. ._
. ._ . . 1 .1 1 1
1 1 ..w. .. 1 . .
1 . .
.1 .. .-. .... p. - 1 1 -
1. . 1 ._ 1. .
. 1 . . . .. . _
. n a . .v 1 1 .
. . . . u .n. . 1 .
n . .. . c .
.. . _ t 1
. . . . .... .
.. 1 .. . 1
o nvfill Q‘A: l IIOI ....... .F. v. s! I;
. M . . .
. 1 h 1 ., ..
. . 1
. c. . . ..
1 1 . . 1 . _
. 11
o u
n ._ 1
. .1
¢
1

 

 

 

 

2000

1500

O
nu
2
....

.mpHo> Hmcfisnmu

n
V

Imo

amperos.

— 19
L024

 

 

VéCnrvaa for nvfichronrum motor No. 67W527.

Land No. 1. Low! No. 2. Lear! No. 3.
Lin. ‘ F1911 Line F1311 Lino Field
Current. Currant. current. current. current. current.
1&7. 3.9 Mm Luz lune 3.7
an. u.o u3.o 5.0 u2.5 3.8
h2.o u.1 “1.0. 6.2 1 31.0 M.h
35.0 h.) Mac 6.8 6.0 5.7
30.0 “.9 “7.0 7.h 13.5 6.5
25.0 6.u 22.0 7.1
30.0 7.0 35.0 8.0
39.0 7.5 h3.o s.h

. hh.o 7.9

fl«~»uw»~7ig— ~»-m~»u -._, -., u~
.V-Curveé£ _ f -
Synchronauastéotor .130. 5&u627.é-_~~ 7 -
14No load
Z-nie-iium load. {
”.‘“”3#6Vefload.'7“ " 'g“,.‘ff9ML7ffTi-f'
' —‘i -’ ‘5“ 9‘. .J-’: :QQ‘~1 §-?;  ?u. ;
”‘- :1’ ‘i‘ ;‘ ""“ ' “" ‘ '- ' --' 9“
‘ l ; : f};
‘ f ; '"if-f ’“‘ " "“.:T" ’ ‘ "
9 W “3::

. ...
o
l

A

 

W
O
V 1

I

I

1

$

I

current.

Line
to
(3

 

 

o ..2 '1 _ >_6 8 10
F1011 ourzqnt. '

. - . . O
..- --- -..—.-.._- uL‘-- -—--~--.-.-.-Q«r- -.--.1 m"W"

 

0. r. “w r« * ~. 1 ‘0.
F1611 1:0 F1911 1-0 Field I - 1.7
Prusheq 4 Mn Prushes n“ Drnqbes flown
Pewcrcz €25" Power - 670w Power - 850w
P.P.M. : €20 R.P.w. : 970 F.P.H. - 990
Time D.P.v. n. p. u. 5.P.M.
Q06.
0 1260 1285 1365
5 1205 1210 1320
10 1160 1200 1270
15 1115 1159 1215
20 1070 1110 1165
25 1025 1070 1120
30 980 1030 1065
35 930 . 990 1020
no _ 890 955 970
A5 810 915 925
50 goo . 330 330
55 760 Su5 she
60 720 310 700
65 680 775 750
70 5&5 7&0 710
75 610 1 705 680
80 575 680 6&0
55 510 ‘ 6H5 605
90 505 620 565

95 470 590 530

petnrinticn on No. U33950. Cont.

Time P. '7. if. P. 7-“. "I. P.
388' uho 530
105 M10 535
110 375 510
115 350 ago
120 315 R55
125 290 LL30
130 260 uoo
135 230 375
110 205 350
1H5 180 325
150 150 305
15“ 195 250
160 100 255
165 75 235
170 215
175 195
180’ 175
135 150
190 130
195 110
200 90

Time

890.

100
105
110

 

Retardation on 10. 135350. Cont.

Field. 1-10 5
Brushes down.
Power-8600
R. P. MH-IOIO

R0 P0”.

1300
1245
1200
1150
1100
1050
1005
960
915
270
830

_705

745
700
670
630
595
560
525
490
M50
120
390

F‘i 11-i 1’1. 3
nrushes down.
Power «9000
P.P.M.-

R. P. ’g.

1275
1220
1170
1125
1030
1035
990
950
900
860

810‘

770
730
690
655
620

010
390

Field I~1.1
“ru3hes down.
Power ~690w
P. P.‘J.-9OO
‘R.P.M.

1330

1230

1035
990
950
905
860
810
770
730
700
665
630
590

550

515

#80

#20

Prushes down.
I--'"01.sw(-3r ~820w
R.P.M.-962

D. P. 'fl‘.

1235
1235
1185
11h0
1095
1055
995
950
910
865
825
780
7&0
705
670
635
600
560
530
LL95
A60
A30
Moo

Retnrl-fitfi. :1 o: No. 'Lfii'jf). Coat.

Time

800. R.P.m. R.P.H. D.P.Y. P.P.M.
115 355 350 335 370
120 320 390 355 3&0
125 300 290 325 310
130 265 ‘ 255 300 250
135 235 230 270 250
110 _ 210 205 210 220
1M5 175 210 195
150 155 150 . 125 165
155 130 125 160 110
160 100 95 130 110
155 75 105 25
170 ' 80 . 50
175

150

155

 

Retard0t1“n on Ho. "33950. Cort.

Field I-.7 Field I ~.5 Field I-.25 F1011 I-.1
Prushes down. Brushes down. Prushes flown. ”rushes d05n.
Power ~3102 Power -€5¢ Power - 735w. Power - 590w.
2.2.2.- 990 5.2.5. -210 5.2.7.-880 R.P.M.- 515

30:? 3.P.M. 5.2.5.. R.P.”. R.P.“.

0 1250 1320 1275 1250

5 1200 1270 1225 1235

10 1150 1225 1180 1160

15 1110 1150 1135 1115

20 1060 1130 1090 1070

25 1015 1035 1040 102°

30 970 1030 995 975

33 925 955 950 930

no 830 910 905 890

M5 8&0 295 865 835

50 800 850 225 795

55 765 515 720 760

60 725 770 710 ' 715

65 690 735 700 675

70 655 695 665 6&0

75 620 655 630 600

80 555 625 600 570'

25 550 590 550 530

90 515 550 525 500

95 as w 520 #90 h65

had 460 430

100 M50

 

Pet4fiwtion on We. 033S50. Cont.

Time
300. 5.2.5. 5.2.5. P.P.M. R.P.v.
105 M20 550 930 400
_‘110 390 120 Moo 370
115 360 395 370 350
120 330 365 310 310
125 300 335 310 220
130 270 . 305 220 250
135 2 M5 2 75 250 220
190 215 355 2 30 200
155 190 220 200 170
150 160 190 175 110
155 _135 165 150 120
150 100 190 12° 90
165 so 115 95 65

170 ' 9O

 

 

or No. R

etariation curves.

1'?

. 333‘59' 7’.

'at.

anar

G

~fi

   

MICHIGAN 5

"ATE COLLEGE

 

 

‘.- ~~F~9w~n o .

:..._‘—.

g y . . .-.. ...,lTLo-VJ-WQ “c ;“lE‘" »

|-‘—4 ‘4 -- o—o ....

v—-.‘.-O.-t¢ o

......I.
l I-O-'

90+-

  

D4

«o Il¢.,—I-_
L .-o—o

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

‘ H Hv
u~~wv

+9-v—‘wb-l 14-1

 

'1

 

:zr.-oo\.— -5. Lo.

‘-\».~-0L .

2.. ... ...,

.. A... -.

- ~0-Lo-‘4‘;
J

3

..
A.
.
at:
I
v— ‘.
. .

1'

*—
,c.

..’"‘

 

 

...:r-

9“

,_..__- .‘... .
AL

  

   
    
 
      
   
   

 

 

31199119

  

 
   

*- -—---I:--b J
3 ~ 1].. "4
WM

 

 

 
 
  

 

 

 

   

 

 

 

 

 

J
2. .
.l
1”
’v

"‘- o o“- fi-w‘ — 0
~ ' — A V ’ .
- I -—-- " n O U n‘ . » .
- -. _. _+_. -.q - -—o
.. .. .1_.L‘ .-- ...,..' ..r. ,.-[ ..-.
~ . . . .. -..- .7 +.‘ ..-. A4. ... ._.
o 0 ¢ .—. u- ¢ 0.»? . 9 . 9» Y
o‘ t~ - -.-- ... . . 4 >4» y¢ .- .
> ~ ~ - - : . M u .
1...- ‘ _ I... . .
_- ’ '- ‘-§—v.~‘ . ' I» ‘ hi.-- .‘~
' -b—¢1~ --- {-4 !- -
-* - ‘fl‘fl‘ .44’ r» 4. - o
‘. ’ ... 9......L. O~ I“ 0 ~. ' y,n ... '
O ‘ I .--. - g . u v 6
- . —-| A .. ..._~ _ 1 _.,.¢..'-.. .. . . .
r l.- 1"...f_"-._. - . - -:.i.4 . H- , ‘..
. . o .L.,. -.. __ .. . ..

 

 

 

 

    

I !
I

..

db.

p -'39003
. .9 .1
{80

t

69.

 

 

 

 

 

 

 

“—~—-— o no‘ - - , a
3-tk‘- ... .. n
‘_¢_...- -49. .. .‘ . '.
_,._.;-. ._ . ... .
‘ . h
_ l . .- _ ‘ . .
- .. .1. -..—a»... g — ~<
. ...}- .... : 7 .9 -
.— --.-.‘.._A -.-- - . - _. . -. . . - .4
--.“ a - 1 - -
A — —-_-.o—o._ . - A - — .
---b-. ... - [A . -
. - . .--. i A -
4 —~<~ y.-. . _- o . v -
.« ~‘ -. —- 5 . .-. ,- - v D -
—. .rp‘- .-<o t o.» .. .4
-o — v k t . o. ——¢.¢ . o
...-.- ; - - . "Y. . .
' m M-.- .o— -whs .{
on ..— - . . ..5 .. . a
-. . . .- . --.A..‘ -
. ' .. ...I
---—. . . . L ~- 9
- ~7M‘T- ~ . .‘~
.. 'l .— . .. . -- ‘. .1
“.- . , g . _ .
Y' ' ' " " ' ' ""
..-- _. -..- - - .-.J
-‘ . ... l -... , .
-4- .-[-‘ . , A“ _ , . . .
.u - —’—‘ . n u I.
- —o-o»-r --— ' .|
- -‘ , o~ . .... .-.-. . A. . . -
. .-.L . .9, .- ‘1 . -
-.. - ...
.. - .
- 4 ... . ( . .-
.—— . .-J-“.N. -
- . - ‘ . .
. .. - .I .
->‘ ’r —" ‘ C ‘ “
-L - ,_ - _. . -
. . -...L- _ .
O . ‘ q .
. —‘ . - -..—
- .‘.“ > 1'
--. — — -+~¢~ - -< v- - -» '
-—-¢ ~ooDr-n
- -. . .
-.L - - .0
_._. -
- .- . '
-.-.. V ' _ -
g -
3' §
fiY v
.—.. .--Q. . , . .
\ o.——L-. . . u
-
w 1 ' c)!
:t .. 9 -. . .
- .. . .. . . .. . .
H - ,-. , .
-- . |-. -—. . o
-. ""5 ~ . I - ‘ '
--.l_ -‘_ ~.-‘ . !
-....-M..._. - -9...
....n -:.+.—- ' . -‘
. .- ' ‘
- ‘«.,, ‘ . - .
--.--. Ari . ‘1 o
.- .. . g
--. .
-Hu 3 ;
._._ - -- ..-
_, A o‘o-V.--p-or ¢ - ..._ -— . '— 0 .
_A L A. .....-u'
unnuvwn n:— u. r. '."'

 

de_ . C:H . GNa won” om JJ 0: do
.. .mucooom Ian: thfih.

-...
T.
r
c
I
x

u.... ... ....-...: . x. . -_ ; - w cam- .

.---.. o

' “-..—row-
.,. . . . . 9 t- .
. .».
.. *-
.

VOIOV

. T."
.. . v .
.. ..
. .
. ..‘. ...
.... .
. .
..-
.—
J
c
- -
---—....
O
--fl..__
.
...-..5—4
I...
1-
‘—
. ‘
u
~A
\
.
4
-—
'-
s
.. -
v
--.--..
....
--
l
n
b

,-
_. A.-.

re...

I
a
O
I
.
0
I
fi
1
I
O
0
-5
I
D
0
L
I
l
t
I
O
1
l
I
V
A
A
I
V
O
V
I
t
l
l
u
1
t
' _' ' é
' ' l
. A
O
I
I

“Moo- “No-W..- .—

——T~O-——
t
I
1
O
|
9
I

--uoo-d
|
I
,.
I
I
A
3
O.
f.
'. .Y'f I..’
0
A
x
,L
6
1
0
.d
O
l
I
I
!
‘
0
l
O
I

 

 

...
1 u I . 4 . _ . L. .
.. ...“ 0.. ... .. . .. _ .nu .
. . M. ;. _ . . 1 .
o _ . a .. . . v . .— . _. _
_,_ . . n L“ . _ h _ . . . . . a
. .. . .
. . - . - ...N 1 .. .. .1 z. , . t 1
r . . . . . . . .
.. . .. P . . _ n _ .. _ ~
. . o ... ._ . w. . ._ . ‘ .
. . . . .~ . ._ ... . . .
v. # ~ . * . .fi . . . . H . .‘ . n
.. . O _ Q ~ . n .. - ‘.. u.
’ ~ “ . _ . . . _ _
.II ‘ s _ . a n- n O
. . a l I a . J. u. ' ti 1 u n 40 : ...dn 1. a .. ¢ 4 I l Ib'li. a. . m..v. .. . ‘04
M ... . .. m . . . ,
. . . . . . 1 4 . ..... .. A
pl .N . . . h n . . . . .
, ...,ov. . m _ ...._. . _ . _ . _ fl N.¢‘
I. , . H .H . . . . . . . . * _
1 . . , . _ . . . . . /.. . w . ..k
v ... . o I.‘ . to “t O \‘t. O . 4‘ n
. n — W C _ I . r
. . 5 o. . o . . ck
. . . . o.
. . ‘ b _ u§ . . r . _ _ . .
.. . . . . . o .. , u . . , .
. , _ . . _ . _ _ . , . . _ , _ . .. _ . H . 1 . ¢
. . .. o. . . . , .. . . . , . 4.. . . . . 4.
_ . .. . O H ' . . O ' N . . . . _ .
. . . . , . ,
. . I: . ., - . . ,.--. .. - .. o, r .. H H” 4” Y . Nu. “H1 .... - . . ... . : v - .1 .. . ..- . . -...-.   ...-.l:
. . . . . . _ ~ . . A . ., . _ . ». .d
. . . . . . . . . fl . . . U
. . . . . .. . . _. . . . , . .
_ . . . In .. a ..:H . . . H : ..,. _... _ . .
" II . . . . . . w
. . m _ .. _ . _ . . . . .7.
r _ . 7.4...

.5232... _ . 4
.ommmm: .oz.go«¢uecoaw.o.m. . . , . coma

.mobnso coapmtnwpem

 

¥001H

 

III-LI, Iv ll

 

 

AA

p

COLLF“

'AIE

 

O
\O
9f
3
r1
0
N
r-i

. . _ . ., cod om om 0: cm 0
_. .W . . . .mucooomuosfla . ._ .

 

 

 

 

. . h .
_ // ‘ . .
. . . . . . .. . .
. A V l: . ’ . u . 4 A
.. w r . , . _ . 1.5., ...r- -- .z. -.-.- 2-1.:- ---; CON
...--.-- - - ... --.... . ....-. (....-. ,- ... .1 . .. --. ..-- . . . .. ... .
.A c . :/ .. .. . . . . .. . A . .
A , .0 n . A . . .
. .. .. .J/ r . . . . .
.. . . / .. .. . . . .
/ A . . .
. ‘ . .I/ I.. A . ” . . H o .- . .
.. . . a . . [I]. o. o 0 .w .. .
. .. . ; ... . . _ /.-.. .. . .
. r o./ (.0! .1 I. . L I 6 ll Ol- . u n t . I. - A .- f 1
Y. ' . . . A v1--| A; o:- .l' I! \V A A .‘ . .. . A _ _ . ..
.. . A .. .4 . .... A u a / . M... . . _ . ._ . _ ..
. . . ... l . A .
_ . . . . _ A. . ... A . A . ll. . .. . _. . . . . .
g o . . HI. A . I A . . . u A _ .»
~ . ~ 9 _ . .. . / .V F... . . .. .AA . A . . .
. . F .A* 4 . A . .A .«A . I! . *r . . . _. A - _ A
.. . . A . . . ...u . .A.. . A.“ . . . . . w . M
h “n, . Q AHV-a . k . _ A O .‘ A. a
. .. . .... . M .. . . .
A . . . h“ ...—n » ... - ll". . . v1.9 .l.. .-. .l‘l I. ...l...f.-v\l\.“!\». H 0.1.r
1 0. "‘~ ‘- --...-l 0': ‘ .l‘ .-‘| ‘ "ll I l l‘. u u — _ —
. A a . . ~ .. o .. . . . ...
¢ .. . . . A . .— . . . . A A . .m. . _. .
.g. . u . :...;. _ __ _ . . . .;: g. . 9
M A O H. . A At A I“ w. 4 —. 0.. .L W.” .-
. v. — A. o a. _ _ .. .... .
A . . .A _ .A. A . . _. m A . A. _
.. . .. . s . ... . . .
. A 01 '1 |. I . I: A l' OIO’ '5 c
. vu.-.. .. .oIA.. ._“A_0.4._ -A..?“ a 1 . . .. ..q .. 5. ..
. . .- A w . 4' . .u to . A._ a... .A .o A . ._ m A. A H ._A
h. _. A _ . c .. ... u o A _ .H A
...I. . . _ . H; . .. .... w T. “L. T _. i .T ..
.H A n ._ - ..~_ . .A. A.“ . ... . .m. A * ...w. _ _ u. N... ..
. . w.. .~ hv.. A ... . _ A _ .... . .
... .. v. __ ., ...: ...... .. . .
.. . . .. . . _ .. .... _._. .. ...... .
A . A _ ... . . .
:A G olvl o b. 0.0 n A- * . o o ‘ a » It tl... I .Q .'t| .fi v I. III P . . ‘9 A- v.5\_l IN Autl .M‘T".4 ' ”lc‘wq. ll...:‘.‘o. . .0 JWIIA 1!...16. 0.. o
.A. a .. A .. . fl * . . m. . A . . .A . . . ..
I A u A - .
.. . . F . .m . ._ . . N. . ... .A. . .... .. ..
. . . . ._ . . . . . . . . A. . .
. .*_h _ _ p .. m. .~ .* . “A. .A a a.“ . . . ... . A. .
. v- A . . . . g . . o . A. . u A. . A. . . A . . . 1
7.. _ M . o . . A o. A h .. .. . a
M. .. A. . . . A . u . .A . A .. . A ...... . . . . .a
0 >0... ~. ... A o. A. . O 1" I .o.. . u- o o - 6.0 . ....IA :45 ..oIoIo-fl' I I0 .‘ 1’ V.
A ... .. . _ . . . .A . _ . A
. m A _ u . ~ . .
... ...... . . . . .. .. . _ .
W....~ .... -*.'... a . _ 1 - .H .. . A “T . 5.». . m4
0 . A.. Ay.... ... . — _ A . . n _ .
.. .. a .w.... A . . u A. N _ .. . . ~ "w... ... .. . .
. .. +.. . . . __ _. . . .. ._ .... ... .. . . A .
Yv A. .A.. I . . . ... . A .... . . . —
.. A. . _ A .. . .. . .
. .. . ... . .m . . .. m A ...n . _ .
vii..- . .OOII... 3 ft... .10- -7. 0.0? t» 0 -0»! ...q «I. n.0- ..I. - A.. ~ .(I |l. \ d r
$ . A . . . A . fl _ _ . . . .. .. . A .. . _ _
...... . ... L . . _ . t . . u. _ .” . .. . .
0‘ .H . . _ . . A ~ A .. uA. .
.. .. . . . . .. .4.
o .. A . . ..~ . A . . . A .
. .. . * A p. — ...b. A m... . ‘ .w. A. _
.v . _ . c. _. .. AV.A o . h m A. . A A A. .o A. A g . . . .
. _ . A
a n .010 .l . ‘ A - . I o (I, I1 ' 1.-.! ' A. '8 I |
. .. . . .. . . . . . . .. . -
_ . .A. W. h._ . . . .. . A . . . . . . . _
. . . . A
. .. . . . . . .. HA . . “ o _ . . o . o . . A A
. . . w W . I . . o .. . .. . . 7. v. .. fl .A ._ .
o . . .. . . - A .m . . . . . . . . A . . . . A
... . A . . .... . . . .. .. . _ . .. . .
... .. _ _ — . . ..w . . . .. ... . . .. . . . o. _ . v. .
A. . . o. . . . . . ..A . A - .. .
w: . . . A . . n _. . . . . - . . . ... ... ..... .
. | i ll . -. o .t‘l. l."a kl»! .l ..f O.\fl‘l‘§1.|‘il .0 n.07- ...-5-4'.‘ -.’.OL. tlv lol . >0 9. £0-11 A I a.| I u .l. 7‘ O. 4 ...-Ag”!
A A . ... . A .. . A. . A . . ...A A A .AA. . .A.
A — + . t w . — o. A - . .o.~ .- . ..A A A A . A
a _ . . . . . u _ . . A A _” A. , . .A ._ . a. . .
. . . A . A A g . . _ .
A. _ A . ,. . . .. A ~
. _ . . . _ _ .m.auH a m .. . . ,. _ _ . _
.. . o . . A
A . .. . A m. A o
. . _ . . A v . ._ A
. . l . . .- A .. xiv
A _ . . .. . .
_ M . m.HuH : a . .
. A _ _ . .
A . A . g

g .omwmm: .02 novmhoWWu .o.m _ .--: _ .... . . . OONH

.mmbumo noflpmunmpam

 

 

 

'L—F-‘x

A”.

 

A???

Retfir'ntion tefit “n ”0. ”333510

Field I-o Fiela I-o rimli I-.25 P1211 I-1.9
PrvePes Uh. “Tug“es flown. frnshns ficwv. V“*w“03 Ro‘n.
Fo“7?-QIOW. Po Ir ~70?.5W. Po 9T-7“ W. “a % ~7591.
P.P.W.-1$ o R.?.V.-E e P.P.”.-10}O F.“.".-19?5
Tiflo
Sec. B.P.m., p.P. . _ P.P. . p.P. .
0 1355 13ho 12§o 1275
10 1265 . lone . 1190 1175
20 11E0 11MB 1095 1065
30 1095 - 1050 9§O 970
1to 1010 960 930 870
50 935 230 5C5 730
60 650 790 730 690
70 790 715 6“ 620
’0 7°C 6%5 573 5&5
°° 5‘0 570 ’9” M65
100 595 500 £30 390
110 510 #30 355 390
190 ufo 365 290 250
130 Mao 305 220 130
Inc 370 210 155 100
150 310 175 50
160 255 110
170 205
180 15“

190 105

9

At. A

" CF'C‘A‘N

 

 

- L I 4 4.. Q .1 - 01.
m. .cua. 33am. cma aafi aw ax c3 0
.H U .

A . .mdnoomm I oede

... A

. .v. _ 1 u
A .. __ .

. . A .
. A
H a. .. .
4. .1 ALL- ....1 115-. o I A. n . , - - . “.1
. .. _ . . . .
._ n . .

A _ . _.

a A. _. A a” A A A o . . m... .

A . . . . A A .

PI". .1 I ._ A . . I.. . 1 0“: o .u ~00 a. F.’ 0.1.!!! | . _

.A.... .14 A .A.. H. . - A. a. . H m . .A.. w A .

.A 3. .. . A ..

_ .. A — Aw . u A A A .

A. . . _ .
w. A . . A .. ... .. . . A A .u._ .. . . A . A .
. . _. .A A» . . _ « . .. I . ...“. . ... .

. w A .A‘ a . o -.I . t! oil: I .1 '00: ..--v 'pni"- . OO‘A It- (A 1.9.. '1 . 111A ‘ O 1...: In
.. -- .1”; ....x.- ..-..- -2 7 - . .... - .. .... - . . A . ..- . .r . _
_ .4 A 3 .. . .. .. .... d . ._. _. .
.AM . A .... . “I ..A .. u . T A ..
. ... A . A . . A A . k . .A . .. A .

_. . w A A .A _ .A __. o A A ...A‘

.. .A . c . . A .A. A. .

A . A AAO u .

I..!OO ' ’4 I ...*1 A . . o A _ 1A O: I . 101A

f .. . .. .. A . u . : .

. . . . ...A _. .A. ... . A _. .

H, . . .p .... a; . n A ,

A A
A A .A. A. ..H . . AA. . A A . .
§.0II ‘II .....- I. |. n A- $1 . . 0 i .4...- 1.701 wall I. :lv' .A A
W. . . 177.. .w . ... a. .... 1. A _ .
Ao A ”A. .. .., u .n A. A A . A .
. _._...V.1. . , _ _ L . .HA. A . . ... .. .
_.. ......IT 4;- n . I . ..... . 1 1
117...... h ”A _ . . .3 ... H h .. A. h. . .
... A ._ A.. . .. . . .. ... ,. A ... .A H . .
A--”. |.D.:.1A.¢.A”a“ .11.“ o 1|. A. L .A 1‘1. “IAIJv‘ .A.. My. If .. fl. .QA A .f' .1
“M.H.A. Afi. «A.A“... AA m. y w u.. . . ..A.. A_A.. .A. . A. A

..A. ..AAALAA. . A . ..Aw A _ .A. A . A .. —

......IHTF. . H.__ r ”T . H : . ._ - _
..A A“. .AA... A..“ . w. .... ... .. . A__.. AA . A. u _
H40. ”A. A .. .o h A .. A A m. . t . __. ".A.. M
JD...- .‘ t V .-.“. A V 1 It to- 3“ {to 7" ’11. *0 AIOIIIA.Lt' l I \OOI ..- t .
i333... . . .. ... _ H. .....g M. A .
A1...” .. .. ..-: .-.:t: ... . ... . .
. "A A .. _. _ ... . .. .. ... . A
KAAMM .A... M m .m...... .A. _ ..A A. ... a... . ”
AAA—IWA‘ALn .A A ‘w l . HL—A ”A” .A-. I .*.mW ..A A..... .M _ m
.... . . . , ..., . ... 1:. ..-
2. _ .A.... . .. .m. Ana... 3_.-_ .
A A . A .

"A... . . . . _ .. g H . . . ‘

“A. .A._ . . . A A m .. .. A . ... . _

.. - . .... . -- .- ......T y. . . . ..- .--.........r..a-..- . ... .-..-- . i .WAN rd“...- M. ---- -
. . _ _. ...: . ..+ .. I _; G ‘ . ..
w M . . .. . ... . .
. . . . . ogov mflfiwgm 03H 8 N.
A A . .. .
_ o . - ..
A .

A

. _ . .2. 8335 cup 4 A .

A A

. . A

 

 

 

Hmwmm3. .02 “383...... .u ..m

.mmhuso nowpmdnduom

 
 

   

00m

00w

oooa

00m H

 

0
.
- "-‘VC‘- -A~

 

 

Tiwo
Sec.

0
10
20
30
no
50
6o
70
so
90

100
110
120
.130
1&0
150
160
170
180
190
200

210
220

Field I-O

Brushes up.
Power-”53w.
R.P.M.—1005

R.P.M.

1315
1270
1190
1120
1050
950
910
845
780
715
660
600
550
500
#50
M10
365
320
280
235
1&0

1&0
100

Field I-O
“rushes down.
Powor-670w.
R. P. 550-965

R.P.M.

1355
1250
1115
1010
950
850
760
630
600
525
RSO
335
320
255
195
135
70

Retardwti n on No. u3u701.
Wruahes down;
Power-EBFW.
R.P.m.-1Q6o.
R,P.H,

1310

1200
1100
990
900
$05
720
635

F1611 I-l
Prughna down.
Power-9 ‘7'9'4-151.
W. P. 1.11:.-10280

9.13.711.

1250
11h5

1035

930
£25
725
630
5h5
M60
385
310
235
165
100

é/

Tim
So

10
20
30
MO
50
60
70
SO
90
100
110
120
130

Rruehes down.
Power-IOOOV.
R.F.M,—1012
6
Co ROPOMO
0 12%0
1115
,1000
390
775
675
580
MES
MOO
320
2&0
165

90

Retardati n on No. u3m7o1.

Field 1-2
Utmsh94 down.
Forget-121%“,
R.P.¥.-1025
é. PO "0
1400
125
1110
930
9:55
730

F1211 I-2.5
“rushes down.
Power—IZSSV.
P.P.M. 992
R.”.‘!.
1390
1250

1100

960

820

690

575

#60

35“

260

170

75

Cont.

F1311 I-3
Dru-.531 '23 do In.
P0”ar—1”E5w.
R.P.M.-9vb.
3.13.2.

1360

1200

1030

E70

730

590

h65

3’45

235

130

57,2

Tine
Sec.

0
10
20
30
ho

60

70
80

Fetnrifltion on we. R31731.

pr?.18“3$ 307110
Power-ISBOW.
R.P.?I£.
1310 ’

1160

Field I---1L
ershes down.
Po've r-1W3OW.
p, pug—1010
R. P. "’1'.
1250
Ions
850
670
505
306
230

110

cont.

Prumhea down.
Power-207OW.
R.P.M.-10?O
P.P.“.

12MO

1020

£15

630

Q60

310

175
no

 

14C

 

 

 

 

 

 

 

 

 

 

" ‘ "' C~~“° * -'0~»‘M 7” o-v- d-v-I-fiq- w
. .- . .l .. .. 7 - . ,._1- a . . ... ... n 1
.1 .. _ _ , .1 .. ' _ ._ ..
. . - 1 1 -.-1. . 1 . .
,. . __ 1 . , ._ .1-
x , ' ‘
t . . ., . .
_ ‘ _
. . .-. . ‘ -‘..——- - -. ._ .. - 7
' .-. . ,
. ‘. - .
o
1 i .
. - _- Q. .- 1 . -- . -
. . _ . ..-! . 1 . . .- g . .1. 1. 1
- -1 7 7 ~7- -- -7¢ - . .. -
l - . 7 ... n.— so .1- 1 .7 q I t
- 7 — - o 7-— -~ -w—1 . -.....- -.—-—L—~~ C.- -‘.—o- h-. o *—-‘v~~—.‘o—o~u——-Ov --—-- -..- — - -7 . . - . ~
. -7 7t - --7— 'r — - f 7 - - . '
7 a .o - - -7 - -.. 1.77 . a- . . . .
( - . _ - . . . .-- 1. . . . I . . . ~7 .
3 >71; 7 7-. —- -~ 7 a . ,-. - ‘ . . . -
.. . -l . . . . . . . ._ - 7 .
. t . . . .. . .- . .v . . .. - .. - 1 : _.
. l .. . t 1 1 . . . . _ .1
. ..1. _ x 1 . -....f 1 . . . . .
. . 1. 1 ~ . . .. . . 1‘ . |
---— ”-w7ow‘~‘-c-—-7- --A--7~0—o'~~-7—¢~7o.~77- -...+.- .- .— O7~-~.—--‘c— .7-1 — .§—.,.- r 7 7 .
. .... . '. - .-. ' . - . - ....I- . _ ,. . ,
.. r“. 7 Q ~ 7, 7-. 7— 7 -. F . .— ‘ . _ . . . A . ..-.
. . t... . ‘- . . . 1 - 1 1- - . ‘1. 1.. . . ‘ - .
77— - . - 7 Q . 7..---o. ..-. ~ 7 —- ~1 7 u 7 - ~- 7 u 0
I . - -- I.-. . .. .. - - ‘ ....-7 ‘ ... ¢ . ‘, . 1 , l
1 . . .. .. l 1 - .. -....-. ;. . .1 ' -... -..'. o . .
. 1.-- .. ‘ .- ... ..1, - .o_. -‘_ — ‘ ‘ ‘_T o
_ _ 1‘-1_.-- -..-1 .- ...,o .. . 1 ..._. . ’ v - 7 . ' o - v. 7 - v o
- -.. .- . .. ..... .. _ . 1...... - 7 o - - 7~ 00' . 7
. . .... .. {N.. - "o— a 5 ¥ 1. 7 t ”-m—‘ ~«.L.1 _. fi- - ~ 0 - .- ... o . <1. .-
.7. 7. ‘. - -~o+- ~ I. o ,1 -. - . 4.... , . -l . . - . a
- - »-'7o .- '51q--4 . o r 1— .. -.... - . . .... b .17 x.-. .- . . . ..
.. - --11...-,-... 1.. . . .... . 1. . . L .1 . . fl
. -'v—‘ ._._. 1.... a. - .—.. t . .._, . . .-1, .. .... ‘0... . '. . ..L .-
.. _ .. 1 ..-.1 1 . . .-. . . .1 . ,- . 1.}.. . ...... - . .1- -........ . .. . 1 -. .
‘ ' o - . '7 t- -- p.J—¢-o~-- --v* ...- - - ... 7 ....-—..V . 7 7'» '7- n 7 a. -
..-.. . . --1r-..¢a.. . ... .7.. .7 - s. - 7- . . - L. . 1 1
. . 1. 7 j -7 -. . .7. _' ..-7-7—§ n-L -, .7. - .7 t .
,1 -1 ..-. . - .. 1... 111-11,. .11. 1. 1
. I .- - — 4M----,.-—~7.-.-.- —- —..-—o.T—-——-o.-—o-7o -.7-—»»— -.—~—. --.7—o—7 -1 a- -- . .
.1 .. . -. 1 . . ..-- t _. . , .. ,, . .
H Y . . ‘7-‘,._-_. 0., - . .— o—-— -1 p. _ - 97 -1 o .l .1. .1 . .4 . 1 1.. . .74 .- . - g I . '
.< .. . . 1 4 . L ..--.7. 1 _.-1-7. . -1 H 1..- - . «-7- — ' .7 - 0| — 7 q
o 1 . .......4<.L.. -'. - -« - -.. — .0 - o-.- .- 7-77 — ~.- - . ~, . .. - -
. . ..- -.-.. £- . . -. - . -.. ..77 .-.;--..- .1 -1 - .-g 1 -5 .
b” . .1 . ‘_- . .. .. . -1 -. ....111 1 -.-- .1 . .. -1 .‘1 o
. ‘. .. .1 1. .. V ., -- . - . .1.-. y ,4......... H-v . 7 7‘
O # . ......h, .- . .‘.. .-...1t . .1.-. _- k..r- ._ .1 v. . -. . . .
' . -.-.. 1. ... 4-... - . . 1 ..., . . 1..-. 1..A .. . ..1. V . I N
m. m--. . 4 «-..-m. y-L— «or-mun .. ‘Om co -..”?‘o -. --sv.-o-'-—~vo-r~~«r 7 .. Ho -O' ~‘- - -
1 -1. ... . - .- V ,_ -1.-‘. -__.- -,. . .. . 1 - . . . - . H
m d . ‘7 . ~4-n -' ..oL-1 ... _ ‘. . »o—-n.n— a 1 o ‘ ‘v \ 7 . -
‘.1 ‘ . . .. '.. ¢ . ‘ . -. ..7 P“ ..7 l — .7 ‘ |. . 1 1 c
b .. E .- , ... -... . .—.: . , 7 -..-_.—-. . . . . .. _ . .
. 1 . v‘ . ... 1.. . ._.. -1 .. . .. . . . 1 ..
H o p; O .-.. I ”3.. ..L 1.. ..111. . .. 1.. _ -
... . 1.' .-. .... 7 t. . -.. ......1.- 1 .J . - o .
d o 5 1” .yl ...-1. . ... Q -. .. .. . ..-. ....1 a .. -..- . . . ‘ ‘ .
-.. .I -.... . .-. '61. . 1.- --,. 1... _. . . . ...- .. ..
o z: . ......11 111.111,. 1.1.1--.-11.-.__. 1. 11....... . ...-11, .1. -. . -. -.
. . . . .1 .11 . - -1, . . q ‘ 1
C. - 7..-4.|- - 7 -. - ) .--- .7. _. - - . 1
g H o 770.- ~91<¢~ ‘ r -°~rp—ALL —>o— “"r*'*-*" .' -o ..- ~4- . 4y '- 7
. - .7 n . - ‘ - - «7. «07‘ A 1 -~ - - - - . >o7— Q; .« - —- 1 7 ‘ - <-‘ . 1 4
o o n n ..a,... . . ;. t-o . ! -.. .. _—;. ..... .a \.—.~ .. . . . . .
,. ..- - . .A.... . --. . . - - -... -..- .... - .-
..4 43 a ‘13 ..:_.1-.. -.l . 1.1‘.-- .1 3.. y. . . ; .
u 7 fl - r p“. v .9:- OA----..—o‘¢.‘-—..u--a—cs-o-—~ ~-. .4'... a -.‘Q-h‘ -~ r we 0. 0' - 9" ~~ - -
- . 71- 7 'P"--.-h .. ..- . - - . ---. 7 t . - t , ‘ . "‘
as n n .f—. 11 . ..-. .-.» ..
u an m ~- o "U‘V'" " ‘ ‘ ‘ -. H
. . .- .— I . , . - ...1.. I.. . a 1. . .. .
I -. 4-. .... .- ... ..- 1 , 4.. .- . . .. ' . - . l
H g ‘ ' . , ‘ . “'—“ ‘ ‘ “"“ """"'"'*“* ‘ °* ‘! ‘ ' ’ ‘ ‘ .
.- . 1. . . .. It —_ .. - ......” . ‘ 7. --. A - -
GS - O - - HMHw - 7 m
. o- 1.. \ - o . - - I
43 .1“-. .. .. 1-.-...1'..- .. , 1 - - W'd
. . .7. 4' H.- .g .- ‘, . . . u
- -- 2 "' x 7 -*~ '1 ‘ y '
a: :0 ..1 . .. .1- . .. 1.- 1 | . . 1 . o
. 1 1 . .. ..-1.._f . . . 1 .. .
-~ . . . . .
7 O 1:17 - -- 7 . - - >~ ” o
.. . . _. - .
a: 147N777m» ,1» 7491777. - 7 —- - 7 7 m w
. . 1 _. g . 1 1.. ,
1' - a ;:{.‘. .-. 7 7 . - ‘
.7 . 1- 7. . , —- - .. 1
. .1 . 4 .¢-. .- _ . '
, 1 ..r. 1. - .s . . .
. . . . , - . . .-. O. ' -. .
-- .-.---- . ..1
. «I 1. g- 1 . . , 1... . , -. . . '
1. . - 7. . . ,
- .7- .-‘ —4 -.—"—- ’7—07545——7 --.71— - -7— -- - - ~ 0 o
. 1 .. v ¢ 1 - —— - - >7 . v - ' -
- 1 . - ‘ 1...1 -,_.. ..- - .. . . _ - .1 .- . : ,. ’ g
' 1 ..1 ‘. . . 1. .. - . . 1 . ¢
. . A. - . .. . t o .— , .0 - . . _
. ..1.. . .- .. ,. .... .. . .. 'fl
.‘ - . 1. . .7. .— —— ~ 7, .. 1 . , ,
' 1 . r i- 71¢ o _. - ,. . 1. . o- B
. . . .. .‘ . .- | . ,1. k 7 L. . _ .
- -. _.-.1 —-.— .7—- +~b~ -o—-—o--1--- - —- .o-o .—-7..-_.—— —-- -m‘b.‘ .. ~- . - - 7
. I .1 .. , Y""‘ _ _ . \o
. o < .--. ‘
' . .-1 -. o . . . . l
1 . . . . _ 1. .
. _ . g _ '.. .1 z a .
. . .. . 4
. O .1 ... I ’ ~
v .1 — . - -v — '
. '1 ' --. l . . I .
1 -... . . _ .- 7- 1 ._ - .. 1 . _1 _ 1 , - _ -
" ., l 1 ., . .' ' .
; ' . 1 . - . . .
.. ‘ b .. 1, .
-. . . o - .
. . .. o . ‘ A 1 .. . -
u _ , . . .. -
. ....- o- ,. -«\«-—-- l-cu -o~ . -~ .— o.-. - —-.--- .>-7 --— . 1--.—.. .-..|. -.- .-7.~ -
. a- 1 1 ;
7 q - . 1 .
0‘ F-- I I v . -
.. . . . . - , .
I ~ ~ 0 - .. .
’ - I O . ' .. n
. , 7 . . . . . . . .
\ . . 0 1. . 1
.
. — - -.. . -.4 . . .- .. .‘7- - ,- p...~— . o. -.- 1. . _ -
. . 1 - ‘ --. U - . I
r ‘4 ° . ' K v - ,
; , . . _ . t .. . .
' . J ..-.. . - .. ..- . I
o. n ' ,.- . . . I
. . t .. n . ' . - 1
' - - ' ~ 5 7 9 . u
. 1 . .1. -< -- 7- ! -F‘ ‘ --~c. o -~~o-—*——.—-> - --—-—--.¢A ~r-- — -1-
‘ . . . , .
_ ‘ .1, . .
.. . 1 . -.. . , _
. . .- . g . .
,1 1. . . -1 .-
l_. - .4 ~- 7 . . l - . .
n
. ' O - v I O
, - 7 1.5 - .
7 . o - .- . . . 1
o 7 -— 4- - 7-7—77 -- .77 -—-.- -7- - - - - —
_ : ¢ g - . 7 ‘ ' I '
-. . .. 1 1. 1 .1
. 1 .
. ‘ . _ _ 1 , r
-.. 7 - ’\a<‘& a ‘l ~ 7 - O
. . _ - - - . 1
.I— . 1A - -{ .- . . . .7 I .1 _
11 u . . . . . ,, ~ . ,
. - ..J. . - _ 1. . .
. .- . .1
N .. o 1 .1 . . . \p :t
.. I. ... . 1 . . .1. .
, _ . . 7 :4 . 1-- . ‘. --o-o .. -—. 1 .,
- - ‘ - - y .A- - .... 9- - ..1
- ~ 0- ' --- - O — 1. 79.. 5- —4~o v' - - in... 47-0-— -- -- . - ~- 7.“.— - 7 7 . ‘
. .. .-- .. ..-. . ,1 .1 ,0 '.. ‘ - I.. __ , .
~ . %‘-- I § ....5 r1. ..— . t -..! '
» ‘ - - ‘ ~ u -- 7—-~.-7 .1 — - --7 ‘. ... -
- .: 7 ’ - .. .. a..-“¢~. . ;. .- -‘ - ~ - o - .-
‘ - . 1,.7 - . .‘ ...-...’ ... . . ... .. _. . . . . . .
...« ...» ' -..1..».§... . ‘, ,- 00-0 4 .-. 7. . 1
1 . .-... ......1 -..--. --. .7 .-1 _ .11-. I.- .
- 4- - --u '-- ...-4“»¢7 ..- 11 ... ‘fl"‘“‘ I “~. -71..»... .- 1 .
74 - Q- ”7‘” { f-‘-~" 4¢¢ooduo .-. lo- .. ‘~- ...4 4A.--7-. , -- 1 Q . 1 . ..-.-. a
- ‘c -- ---0“‘ ‘M ‘ ‘ *‘m~~*.‘-0~ 7 - 7 7 -- '
1 1‘» |. . I \. ‘ . pl!

 

W"
'.
,1

V

. t .
$

7- w—-"p
ow! . .,.o.

,.1...
777.3

“WOW-Own.
7 .

7..

1 —mT.W"——‘—.~'~‘fi--
. ‘1. ..- 1. ol
0
a

?
'1
{.
f

o

-1191».

I

'- --7”

...—

i

.. —-.——--_‘--M.1.
7 o
'

>7.

 

 

O#H

C)
(U
H

ooa om om 0: cm as
.mficooom mgam

.7-- .1 .- . 1 . w , ,.- . _ , - oom‘

7....
---

u
o.

.
.
o
‘

-

-..—.... -.
-
o
.-
- --a’v ’~*-o.~“ -—-

_ 1.

.
.,_‘_‘..‘__-- -- 0‘ ... -.-- -a- ¢
' 1

.o . .
.. .
. _ . 1 1 .
u .1
. 1 . .1 . 1 . 1 1
. .v . 0 . . .
1 11 . 1 1 .1 ,
1 . .1 1 .. 1 1 ., .
.. 1 5 > . v a
1 1 1 . 1 . 1 .1
o. -. DDI..§ . ' M
. M . . o.
_ 1. . .... 1 . .1 . 1. ..
. . n .

o
O
9
I
‘
I
o
'1
O
I
K
D
I
v

‘ .

.1 . .. .11_.

. 1 1
1.u:79:.mw:um.ipm1»
. _. g m
1. .auH1w m.»1

..A

...

_

.HJ pwrmuHmfl1:

...1_,,1...

1 - .. . 1
. .. .-
r..-7¢.. -..-H ‘.
L .
v
. . - .
¢
9.-

. 1 .
c
. . . _
v. u . . ¢ .
... 1 v1 ... . . .
. ... . 1. . ... . .....
k v ..-.. ,. . . . 1.
O. V 6' II- ' Y O 9‘ l . lI/.TV. b . q :lvv..l'vc .ll.|.I‘ I .0 “I
1 1 1. o .. 1. .1huH.+$
1 I . 1 . . . ¢. .. ... — .
.1 . 1 .. .a .1 1 .
. . v .

-..- y.—-- ...——
Q
9
.1
J
O
s
C.
!
a
‘
1
A
. -- .7 1 .
. . 1 . . .
« -0 v v 7 I
... 1 . . , .1 l .1 _ ._ ,. .1 .
' “...-‘oo‘. M— ‘70“.o—‘o. -k”“nm—..~QW7

!
i1
1"
,‘7
8
..fi 1 >
i

1. ... mwmuH «u

.A—
I

..Eovmmfiamafl a H. - . ./. 1 w ._

’

1 18:1? .31., 113.828 .311. . / 82

gmmbnno nofivwvnwpmm

 

‘l.

|!F‘

Retarintion test on No. 659627.

F1011 1-0 F1211 I-o r1a11 1-1 F1211 1-2
anahns um. Prnuhn: flown. Prushjs down. hrvahmd down.
Power-5331. Power—”55%. Povnr-G75%._ Fewer-QBPW.
F.F.H.-920 R.F.M.89O R.P.H.-950 W.F.M.-910
T120
Sec. 2.2.2. 2.2.2. 2.2.2. R.P.m.
O 1325 1295 1230 1250
10 1230 1200 1120 1150
20 1195 1110 1025 1050
30 1060 1025 1000 950
no 920 915 910 255
50 905 270 330 765
60 230 790 750 630
70 755 715 5 675 . 605
50 690 650 '“ 605 525
90 630 520 510 #55
100 570 520 M70 385
110 510 M60 hos 390
120 150 hoo 315 250
130 uoo 310 220 185
1&0 315 285 220 120
150 295 230 160
160 2&5 . 170 95
170 190 110
180 115

190 95

Petnrintion teat on V0. 6¢H627. Cont.

\‘J\

 

Field 1-3 F1e11 1-1 21311 1-5 21011 1-5
Brushes do n. Proahea down. Fruwhea flown. Pruahad io n.
P°“er-91"- Power-995w. Power-IBODW. Pommr-119Cw.
R. PQI‘I‘.-10:J‘O Ro}fiduv‘1.-$'63 R.P. ::. -1015 P.P.?!.-=)}':\
Time
Sec. R.P:M. ‘R.P.u. 2.2.2. 2.2.2.
0 1230 1210 1260 1210
10 1110 1085 1125 1090
20 1000 965 905 9&5
30 900 850 200 005
”0 £00 710 710 675
50 700 690 630 555
60 615 5M5 525 140
70 525 ”50 “30 335
”0 “”5 370 338 210
90 365 290 230 1&0
100 290 200 150
110 215 120
1?0 1&0
130 55

Petarintion t2 t 01 *0. 622627. Coat.

F1311 1-7 F1211 I-E F1211 I-9
Prn-s‘nes Elem. Prob-him down. T’I‘Ths‘flefi r‘Joz'r11.
Power-1415W. Powerc1360w. Ponar-lflfiw.
R.P.V.-930 fi.P.£.-9CS E.P.H.-1015
Time
300. F.?.M. R. .1. R.P.H.
O 1220 1220 1200
10 1050 1050 1030
20 900 890 865
30 755 730 705
#0 625 590 560
50 500 ”55 h25
60 380 335 295
70 270 220 175
ED 165 100
90 50

100

 

ow 3H

   

om”. .90” on
. . . ouvcooocloaap

,_ :3flH I. w“ 1141......14-
.12.“... m. .
- 1 -442»: -

fl

.3... a _. ..

..apou monushm ova r m.
.22 monmsnm.onh I_Hw.
.wm ,nw .oz hopes amonomnuaym.

.um>pfln aofipwvnfiuom

Om

 

om

coma

 

0311 v. 1131!

1 .
.

 

oo- --.-— ...

MlCHILaAN STAY C.

 

 

'00.

 

 

r... Ov-v ...-4
c ..d
A A A 14

um

v
A- ‘..-‘_A‘ A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C
O
a . 4
,, -.-o§-‘ovool.t ..
‘CP w—t-o no - t.
o 4-«t‘a’a ,1. r-“ ‘.J . o
t 0.0-H0f"°"‘ ‘
1 .. _ ”tn“.
H
P 0'4--¢-5H:
. 't - 1
H 2.1.,“
d “‘5-
..- 0- V ‘ -... -..
H O - O <~‘ O y-Cvc-O
0“ ... ~o o 70sm¢p~
-L, , .- 3-. < 0
Q. 0" -.‘.- LY.
. -H'fir'
r -.r}-.-& 0”.
>5» 4»T4.-J - .&»--
4M2: ~‘ -~
I
I. , _‘ ‘ —L.. .. -IWV p.‘
" ' ...-.... ...-Q..-
. ' 1 ...; 71H..- ...: --_.b-
‘ . A ...‘.I¢45.. .‘-—a ,
v o - “L -
.. cut .
r.-—-.~.-d'_.:‘-
. ‘4‘.
O

5 _ ....
. o”.-C~—<.-J
. .. , —.

. -5 1.>r-bvo-

- . ‘ u-- ..- _ ._ -
1P0-§--.-_. ‘4.)4—L‘ ...—o —“r~<‘--O-‘o-— ~50H“
...-' --.'n+. o-u-—.. «A. ..-?0’90h-s‘“ <
.— -.Ja -J.“ ... -‘o ...-

9-Oo-uy-~>~ . .- —-‘--
1...-7‘-3~t1..---t‘n"ozoo<-
. 1‘ s1».._. -'

 

b 0&040‘¢‘«~o---
t:

0...- 16.-9.3-o.‘

~ . . . — . - - ...“A..- o
WHWAAA “‘2

 

F‘f"AUYHI'.7 It |.(A|Nt'!I“|

 

“Baum RESULTS.

PERCEHL VOLTAGE REGULATION.

<3
5
c:
I
O

.gnerator 30. 434701.
Full Load (7.4) a -3.3

d = -2.93
LO":d : -?.3

Cu 2. C. 2xcitur Y0. 433231.

Full L026 (Burns): -€G.4'

F011 Load (lir we) a -?3.3

3 .-.

u 1.09.9.1 = -1-4803
1 L A: 6- 0
2. 011‘s; - -;-g_).‘J

1'3 )

‘ ‘

. 01th coxpoun"i1« qhunt ta,uei ‘0 mifipoiut.

F011 Load

M
H
i
O
\l
L!

& Load . 8.05

«i and — 3.04
3. 71th cornuuniinv shunt

Full Load a 9-34

é Load z.rs

% Load

H
pa
0
.5

CALCULATI‘IQ‘“? CF SY‘.‘.'131?{1"7‘30113 RT‘IACTA’TCE

From tho curve sheet showing the no—load saturation
curve and the short circuit curve of the synchronous motor,
tafe the short circuit current and the open circuit voitare
corxeopo-dinp to the lar est field excitation used on e ort
circuit.

Since this is a Y conaected machine the ph2se volte 0
equals the terminal voita“e divided by VC?‘““1‘ The lgrfiegt
field excitation‘ueed is 1.75. “1th this excitation the
short circuit current is 46.5 2nd the phase voltage 18
ԤZ_ = 50.4. Then Z8 or snychronous reactanco

”0 : 50.4 g. 1.085 per phase.

 

(: . AA 4'3 E
Ulnce ’3 8 V Zé " re

‘

 

 

“W- Xs- 1171.035): . (.0693
:' 1.084

 

.uylw’}

Leases of D.C. Gonnrator No. 133350.

Serifis field Shunt tappei.

Series field

Armature

Bindago & bearing

Brush
Shunt field
Core 1033

Total

18
1.53
127
Watts
39.2
167.5

90.

11k
210

790.7

13-5
1.72

133
Watts
22.2

95.3

90.
1&0.
135
290
772.5

Seriea field shuntei by entire shunt.

Series field

armature

Winders & bearing

Brush
Shunt £1211
Core 1013

Total

13
1.5“
125.5
Wfitts
" 9.2
157.5
1&0

90

108.5

230
77%. 2

13.5
1.62
129
Watts
22.2
95.3
190
90
120

260
727.5

1.36

139
Watt!
9.8
#2.
90.

110.
152

1.68

132
Watts
9.5

12

79’

LOSSBQ of D. C. Genorwtor No. ”33550-

Serfios field not shunted.

11 16 13.5 9
I, 1.5 1.M8 1.42
2. 125.5 129 132
Watts watta Patta
Shunt field 102 100 92.2
Series field ' 39.3 22.2 9.8
Armature - 167.5 95. “2
Windage & bear 90 7 ' 90 90
Brushes 1&0 110 110
Core 1003 220‘ 210 200
16.61 '758.7 657.5 57u.o

L09 as of D. C. Generator NO. ”33751.

Series field not shuntad.

11 s 6 u
If 1.3 1.55 1.2
Et 157. 127 105

_ *atts “atts “atta
snuht field 261 , ' 205 ' 119
Series fioli 17 , 0 9.55 H.21
Armature go. ‘ 18.7 6.32
Wininqe % Pear 9O 9O 9O
Brushes 130 ’ 130 . 130
Core L083 390 300 130

Total , 9%1.’ . 633.25 - 531.56

Loaaea of D.

Shunt £1811
Series fiolfi
firwqturs

Tiniqfa & heuring
5ru3h

Cora 1033

Total

Losses do

Et

I1

I:

F1011 /3
Armature /¢
ginlq"a /3
Bruah /3
Core 1033 /3

Tohfl/¢

H .., . .
C. nonrrstor 1

7.1+
11.1

100

ft)

1:73. t 133
555

1027

103.5

210
675
3100

5730-5

Synchronous Rotor No. 624627.

220
.35

5-65

Totta
112

77
70

:1. 15335701 .

210
675
3600

7626

220

26.2
5.6
Watts

131
11

727

220
17.5
5.75
Entts

13}
19.2
70
27

t..-
PHI
U]

0\
«4
4:

Percent efficiencies.
Generator No. 423850. Pcricc ficl& not shunted.
Efficiency at full load--------—-- 74.6
Efficiency at

r a
p
r)

1
.2.
I
l
1
(I
I
I
r
q

H
0
lb

 

 

Efficiency at { load-- -—-«-— 64.8
Series field tapped at center.
Efficiency at full ioad-------4- 74.5

 

Efficiency at 2 load‘— :— ——___—2_ 70.5

 

Efficiency at g load- =—-;—-—~ %: 63.3
Scricc ficld chuntcd by entire shunt.

 

Efficiency at full load- *————- r- 74.5
Efficiency at % load-2“;—w ~; 70.0

 

Efficiency at 5 inad--------- 59.6
Generator No. 433851.

Efficiency at full ioad----—--- 53.8

Efficiency ct % load--- --‘2~.5‘.5

Efficiency at 5 load <_— ~:-: - 45.0
Gonorctor No. 434701.

Efficicncy at full loud-—------ 64.0

 

 

 

 

 

 

Efficiency ct é load—-v—-— -+—-63.3

Efficiency at 5 load ‘ - <;-:— 61.5
Synchronous motor NO. 684637.

Efficiency at full load- “ — “—‘83.0

Efficiency at 1 10ad‘=~~‘cv—“*—~- 78.8

 

Q
Efficiency at 1 1020 -*~-— ~-— 2: 69.6

SAMPLE
COHPUTATIOHS.

64/

SAVPL? CC“$'T£TI N FCR FEW CEYT V?LTA?E nanULATI N

Per cent valtage regulation a 100 Voi- V there
"‘TF'—'
V is the thtape of the lcefl at “‘ich the regvlatifin 196b—
sired w?ile V0 is the terminal volts at no load.

In ccnputlng the per cent voltage re ulaticn for erch
nachinc the load volta 6 curve for that reswcctive nachine
is referred to. For exactle take the var cent re: 1 ticq
far the D. C. Generator no. 434701. vat the loafi vcltcie
curve the voltage at no lozd is 2320. At full 1055 it is
3400.

3

Th refore 7:Rem. . £320 - 2400 X 130 u -3.
-.OO

R~”“L“ 00"“UMATIAV THW 4 FFTICIFVCY
Generator V0. 333351.

Frcm thc 10nd voltnqc curve for this machine find the volt-
age (137 volts) at full 10nd (S amwu.). Refer to the no-
10”% acturation curvc an] fini the field current nccesznry
to give thia voltntc (1.8 nnpn.). Refer to the loss-field
current mirvc ant dctcrmine tho core lone, brush lass, wind-
cme ani hearing loss, as follows:

Distincc A is core 103: of nachina c3 statci on curve.

Distance B is the brush 1023 of machine as ctqtci on curve.

Distance C is the swm of the brush 108 cc on the other
thrcc finchinea.

Dictnnce D. is tha winicce and hearinc friction on the
entire set.

Since it qu impossihlc to ccnatctc the c cachincs
Fcchcniqulv and determine the 105393 it Will he assumei that
the winincc ani hearinr loss on No.3 #33351 and “33550 is
each 15? of the total, and thnt the winicwc and hearinw 1038

on 1'0; 1#33701 an-i 683627 is nnah 3517.» of the to‘nl. Refer

.-

to the sheet of tatulntefl lease; on machinc Wo. UBBSSI.
Shunt field lose - I? Rf . 1.82 x 51.5 a 26” watts.
Scricc field loss 3'1: RS 3 52 x .265 c 17 watts.
I a line Our cut 4 shunt field current a 13 # If .
IA 3 S 4 1.8 a 9.8
Armctnre loses-1A3A g 9.8 x.52 . 50 watts.

Brush friction loss, from curve sheet a 130 watts.

finiagc on entire set as dcecrihci whovc is 600 watts.

£33

"ovc circle

P!
:f
(9
\9
m
0
*1
D
1'!
He
3
a
....J
C:
:1;
be
3
‘~ I
r-
\H
‘._ 31
H
in
(.2
3
Q
J
p.

a ”row curve sheet 3 393 ratta.

C")
U
"i
{5'
pl
{ ‘1
U}

Total 1383 is thc avw cf the atovc or 9“1 matte.

i efficiency I outhut x 130

outnut ¥ 08393

1 x 8 x 100 g 1905 x 130 _
X 205

: 53.8%

9"”‘L? 09"“UTRTIO? FOP FvVICITVCY
Synchronous Voter Fe. 6?¥627.

From V- curves for synchronous wotcr deterwine the field

current for full 10ai at unity rcwar factor.
Proccei 93 tor the D. C. wcchinc dcccrihei.nh0vc cui
determine the lcszrs. Determine all 103963 par phase Vy
dividing the curve rcaiinr hv three.

Then fl efficiency - in“ut - lcscec x 100
inrut

22.93.35 - 766
: 3 ”w x 100

 

  

n11
ul'A

t

T133".

Loss—-field cu

rvea.

l.

to. 333

ctcr

- Genet

5’97.
L

erOt’O

1200

033...: _.

    
   

 

 

 

         
      

[rhup J.

 

 

 

 

 

“avg

 

 

 

   

   

|
.n
a.
e
v
. ,‘
A
v

      

‘

          

.t
.h n I e m.
it. . . .
v Mal... . _,
KAT... . . In
W! .... . s r.
.. .1
pi... v0. ‘.
....... .. _ 3
.3... H. t
can}. .... 11
tend. . .

.. .....mu .o. l.

.....fuv. . .e.,

.! t.._. ,

.zr. . -4i
...... 4... f
...
1m.. .... -
q. _
i’ . ..
- . 3
.e. a)
a. . .,

~..> . x- . 0

.....w Tu

   

IL.
t-“
”I

Q‘s

.-

ona r"-

b' "
0| .‘n“'.‘

‘.
c

     

‘
' ‘
a

'0'
-r

' .
Pal"

  

'

azfifi‘

‘
.
U

9

".12?" ‘33 o}.

ync

us mctcr N0.

0310'

hr

3

t.

O.

'“OjIJ'

in:

 

, LID

 

eumhshe

fl

 

 

.“W “"m.".".. v..

 

 

 

.

.. 6:3».

18“"!!-
fil, «at

(am.

ii

Sis

 

 

 

 

 

Tatts 1035.

Loss curves.

VGencratcr No. h33fi50.
at
1200 r.p.m.

 
   

 

 

 

 

 

 

2000
g h’
I l
1600 I I;
‘____££2§2£§ UD- "I=O : t
- 1
l
l
1200 I
I c
I
I
I
am I
vi.
1
uco 1‘ £1
_ l D
|
3
i l
.5 1 11‘ P

Ficld,gmpercs.

-u----- -- --

0
cwrrefit cnrve.

Loss--?ieli

701.

'0};
\-6-
/

1

Generator No.

at

I'.l".mo

1200

   
      

. . . .. .. .
. Y's]..0-lt ll
_ ..

.
1"

1 I o i: ,. . . ‘ oi O .. n: u I!
. n . _ V

‘

 

lc.lltlri#Triil.t

Pruihog

 

 

 

 

 

6000

5000

#000

3000

'31
(i

('4

2000

')
4.)

I
J

1000

‘ 0'..-

‘-o—--‘.

G 0.? C L U S I 0 N

One of the objects of this tcet was to determine the
feasibility of accectinm it if this same machine were hcinz
delivered to en incustricl plant. Before unkin~ any con-
clusions or recowuendetio a, the fact thct the wechine is not
being oocrnted in the way for which it was deeivnofi, must
he considered. As mentioned before, the large B. 0. motor
is u n being over ted as a veneretcr thile the oltwrn tor is
.hcins oncrcted as n svncfroncus rotor.

From the acts run nnfi the data token the gut ore are

I

of the Opinion that this wacnine foes not pose a satisfact-

oased on the follow—

1

cry acceptance te t. This corclueion is
inz facts:

1. The efficiency of the infiivicunl maChiBWR are ex-
ceedingly 10w.

2. The rynchronous rotor hoe decieed huntinr chorectcr-
istice.

3. The current ratio? of the 2400 volt D. C. Cenorotor
ie exceegive.

4. The current retina of the D. C. Exciter No. [33851
is excessive.

5. Excitcr Ho. 433851 does not fulfil etnnfierfie of the
Generul Electric Co.

6. 'The synchronous rotor does not hove euitrhle ch rector—

iatice for strrtinr the set.

A Lore co plate discussion of ench of the above
facts vill aid in the understendinw of them.,

Fran an era in tlflfi of the efficiencies obtained from

he C;ICclation it is seen that they are unusually low.

The synchronous 'otor is the best nhchine in this rcscect,
h Vin; maximum efficiency of 83$ at full locd. Kowev r,
the other machines have efficiencies which are lower. For
exanele, the 2430 volt D. C. Generator has a rsximum effi-
ciency of 64.4fi. The D. C. Exciter No. 433850 has an
efficiency of 74.6fl at full 10cc with the co onunfin, shunt
on the series field disconnected and hes on efficiency of
74.5; at full lo-d with the about connected,end tith the
shunt teppeJ at the mid point. Evcitcr No. 433851 has the
loteet efficiency of any other mochine of the set. Its
mezimu. efficiency if 54.5% at g load. This is n rtly flue
to the techine being of very smell 0 incity cue it wo.13
inherently have a lcwer efficiency.

During the te ts the synchronous :otor w~s found to
h~ve an exceedingly bed huntine characteristic. At ti cs
when the rec ine res heavily loaded, tbie cherecierietic
wee so pronounced that it grectly effected the obtaining
of accurate readinvs on other p'rts of the test.

As the set is now being Operated the current rating of
7.4 s:peree on the 3400 D. C. Generator is excessive r=e
causes the enchine to onernte at a tevnernture which w uld
prove harmful in a very short tire. If 7.4 armores is

carried by the series filed of the rectine it till over heat

(/A
i .

to the extent tJ“t the impregnating cornnund will boil out
of the insulction. ihis current does not effect the inter-
pole vinfiin: or the rrmrture but does hnve a deciécd e feet
on the field clrcait as mentioned.

The prement r ting of the D. C. exciter No. 433851
ounces 3 rise in tc“pbrsture Which wealfi be detriwental to

the inenlctiow 1f the full lO’d current of 18 n garce Vere

carried icr "ore tien 4 minutes. lviflzntly this cecfine fine

II'
3.5

rewcuné, to a curtwin extent, enfi the ori~insl nxve
ulcte tag never been Che fifid.
foeever, the exclt tlcn for the 2400 volt D. C. ycnerator
ie of scan a Vgluc that the outrut of the D. C. erciter to.
4L3.5l need be only a Small pe. cent of its prevent iull
load retinr. Luckily this outuut is of such a v-lue tL:t
the t mverature rise of the exciter is normal end the rachine
vculfl be satisfactory, as far as retin“ is concerneé, if
the ncie plate rated current was 05: fed from 1% to 8 cvwcres.
Lne of the General Electric standards for exciters 13
that all 25 velt exclters ehoulfi fleliver 185 volts at norm-
al field current at no—load. Free an exerin ti n of the no-
load saturation curve on the D. C. exciter No. 431351, it
is seen at normal field current (1.535) that only l?3 v lts
are encrzted. From an examinetioc of the no-lcwd satvrep
tion curve for exciter H0. 4?3850 it n1 ht be c neludefi that
the vulture Tom 6 be very near 133 volts et 3 mar 31 field
current of 3.76 nrnercs. An accurate canc‘ueioc cannot be

made since the field current “#8 not carried to norvrl con-

(//

diticne in the ho-lo d t“ t.

Possibly one of the greatest dif‘iculties can ectzd
Vith the op’rgtiov of this aachine in to trihfi the set no
t1 F} c rinjue so ed so th.t the eynchrorous ‘otor he? ?ick
no the 1.35:}. Crcl'ieirrirf :1 cet c7 tf'is tywe 9’- o- lc’ Le

- J- K t". " . ' '. ' van. ."1- "a, 9-. Cs ~- . - . . I" -“ '
startufi y valor the gruuiiouoce Dior :8 on intaction

rotor. Lince tfiie 'ctor has no ’ reflux Winfiuw it has

it :-

C‘I
..-
C l‘
P. o
,3
C."
-’.J
H
7'
CB

practic:lly zero a"; chi rill run st 606 n,e,r.
a3 a Faximu” ep'cd aufl draw a current of 309 ctv roe. 1h"re-
for: it appe rs to he im30~sible to start the sync roroue

motor am ~u induction rotor.

R E C O V P E N D A T I O N 5

After running teote on the motor wen r tor rct th re
ere ccrthin chcn es in the rotinv of some of the units of
the pet r"nich should he race before the set way be owereted
Pt the actual nnre olate ratinw of each unit. In the Chaos
of the D. C. excitcr ho. 438851 and the 2400 volt D. C. Cou-
er tor the current rations were fownd to he too l~r e. Due
to the fact thet tire ”$8 limited, a heat run was not t ten
of nny unit of the net; therefore, an accurate calculrti n
of the correct rated current for a stenfiard tcrnerature rise
cwu ot be wade. However, the rewidity of the tevoergture
rise ”‘ith the present nawe olate retina end the orturc of
the circuit factors of each unchine wakes it seem nrohchle

that the following rotinrs would be satisfactory.

,flchiqg fig. Cur ent rfltlwf.
454731 8.00

851 8.00
zete ere many other terts #1 oh ray he rvn Oh the
5.31:1; "117'? the :1_U.t"flr:1’.e err-3 o: the 1333-111111- thrvt thr'r'e is r‘n
ofifile fier ”or were extefitoi t“”t8 v31"= hi ht be 1Q or—

Jr‘tvq in other theses Si 11a“ to this. Teets 1‘10h giould

prove v Ty irt~rer11n3 "Wfilfl he the investig-tioe of the

‘;"M" r - '-‘\ -~ No v 1. l' 1 ‘ -a = “'| ‘r- ’2 '. P~' ‘7‘ .- 1» A ' "- - “ ‘.
0119Ct 01 3 dr ping inaln, Cm the st~1t1r, ch1r.ot rlet1ca
(\ 3"". n1” 1h71-‘r' r» ‘1 ‘8‘} 1 “r? '7 '- 3 - 9 in - --v - ’ --.‘ \
c: Lu V11 rn2e motor. 116 eu11t10n 01 a c 1 i1t v1nainq

~e.1fl correct the huntin: charzc t riatic to go extent;
Lavev;r, it totlfi be of inter st to deterrine the effect of
ine aofi i ventiyeti“¢ t’vir
a??oct on the Montirg ch rocteriatic. PJQE 1 y th_ root

1:;urtent tefit yet to be taken is 2 heat rjn of each unit of

CO.
Fy.
b I
\U
Q
J

t. *ith a com lete heat run, the ratinme of each archine
C -ld be ac; W?t61y flet 311lxefi.

rn. . , .1 n - .. - . . \ I ‘ ‘. 4' .‘V
L20 13y n J8 UCanifl- uJ run

5

.0
\J
H.
d-
x)
t I
f‘}
I“ I
«1
O
(a
d’
\J
(-0-
O
0'

similor teete on other use inee in re :rde to Jetursiaing the

H
x.)
t
1
,P
L
'3
O
f“)
C'P'
y—‘J
“.21
Lu
(3
.- I
p
“q
, ,
(J
.4.
cf-
p.
U}
:1
1.’
P
f
H
t
(3
cs.
O—v
p—l
.J
cf
0
d-
...—J
..J
L.
*‘i
N
2'"
1.
CG

rathnr th”o the reta fution wethoc, mi ht he more fleeir+h1e
for findino and eeperetioo the lceees. In text bo1ks, one

is eerie? th‘t the retardetion nethofl shoulo not he usefi on
Machines of 3m:11 in rtin; but one RhOnlé not nee it no any

rec iwe ”Foes loeeee 2.6 smrll. Th re is a fire t c‘ntoe for

on

.1

error in an ec~urete deter i~otioo of the instantaneous Speeds,

but i'e were not hard 101--poor? 111 13.118 “‘12:; since the ire-1141.3 of

II .Llot'Er‘

 

the set was sufficient to keen the smell nachinen running
long enough so that reliable Speeds could he tnken.

The greatest trouble encountered in this particnlsr test
was to note the change in the core loss of the excitnme vhen
the field current was changed slirttly. It was found, upon
Workin0.uu the data, that sa~e curves were of no v lue ther
caneieerahle time had been snent nekinfl the test. A3 a
check it would be of interest to determine the efficiency

of the exciters by sure other independent methofl.

BIBLIOGRAPHY.

 

stunned an» end. Practical -= w weetmgheuoo,
mmumznomuu Wing.Vo1.1-z.-m§pohrfl
Direct current luum.-----O- Ponder.
Rimiplon of no. Hum.” st; —Lawronooo
Handbook For Electrical Engineers.
Boner-.1 11001310 m mum-Gourd that!“ 00.
Menu: Motors sad MmoflCI.---Blom011.

Ham). of nautical touting. ‘ Em Electric 00.
Electrical Hoamuontr L w; ‘ amt.

 

 

P011633 .

 

 

, . ,. Fx‘n‘.» . “a. his ‘l‘lwfil Entxzflgblnkm ...bfa .01.! 00

fr um

..o»~ ‘J‘ln

. fan:

 

.. xi... ‘2'... Sr’u. I-..‘-.

 

 

 

 

,*“‘3AH STATE UNIVFRSRT"

'1. = 901+ PS
2' . " t I ‘ i
Hill M I” H. H l
3 3175 2425

1293 0;