英文文献
1
f附录1：外文资料翻译A12原文
TRANSFORMER1INTRODUCTION
Thehighvoltagetra
smissio
was
eedforthecaseelectricalpoweristobeprovidedatco
siderabledista
cefromage
erati
gstatio
Atsomepoi
tthishighvoltagemustbereducedbecauseultimatelyismustsupplyaloadThetra
sformermakesitpossibleforvariouspartsofapowersystemtooperateatdiffere
tvoltagelevelsI
thispaperwediscusspowertra
sformerpri
ciplesa
dapplicatio
s
2TOWWINDINGTRANSFORMERSAtra
sformeri
itssimplestformco
sistsoftwostatio
arycoilscoupledbya
mutualmag
eticfluxThecoilsaresaidtobemutuallycoupledbecausetheyli
kacommo
flux
I
powerapplicatio
slami
atedsteelcoretra
sformerstowhichthispaperisrestrictedareusedTra
sformersareefficie
tbecausetherotatio
allosses
ormallyassociatedwithrotati
gmachi
eareabse
tsorelativelylittlepowerislostwhe
tra
sformi
gpowerfromo
evoltageleveltoa
otherTypicalefficie
ciesarei
thera
ge92to99thehighervaluesapplyi
gtothelargerpowertra
sformers
Thecurre
tflowi
gi
thecoilco
ectedtotheacsourceiscalledtheprimarywi
di
gorsimplytheprimaryItsetsupthefluxφi
thecorewhichvariesperiodicallybothi
mag
itudea
ddirectio
Thefluxli
kstheseco
dcoilcalledtheseco
darywi
di
gorsimplyseco
daryThefluxischa
gi
gthereforeiti
ducesavoltagei
theseco
darybyelectromag
etici
ductio
i
accorda
cewithLe
z’slawThustheprimaryreceivesitspowerfromthesourcewhiletheseco
darysuppliesthispowertotheloadThisactio
isk
ow
astra
sformeractio
3TRANSFORMERPRINCIPLESWhe
asi
usoidalvoltageVpisappliedtotheprimarywiththeseco
dary
ope
circuitedtherewillbe
oe
ergytra
sferTheimpressedvoltagecausesasmallcurre
tIθtoflowi
theprimarywi
di
gThis
oloadcurre
thastwofu
ctio
s1itproducesthemag
eticfluxi
thecorewhichvariessi
usoidallybetwee
zeroa
dφmwhereφmisthemaximumvalueofthecorefluxa
d2itprovidesacompo
e
ttoaccou
tforthehysteresisa
deddycurre
tlossesi
thecoreTherecombi
edlossesare
2
f
ormallyreferredtoasthecorelossesThe
oloadcurre
tIθisusuallyfewperce
toftheratedfullloadcurre
tofthe
tra
sformerabout2to5Si
ceat
oloadtheprimarywi
di
gactsasalargereacta
ceduetotheiro
corethe
oloadcurre
twilllagtheprimaryvoltageby
early90Itisreadilysee
thatthecurre
tcompo
e
tImI0si
θ0calledthemag
etizi
gcurre
tis90i
phasebehi
dtheprimaryvoltageVPItisthiscompo
e
tthatsetsupthefluxi
thecoreφisthereforei
phasewithIm
Theseco
dcompo
e
tIeI0si
θ0isi
phasewiththeprimaryvoltageItisthecurre
tcompo
e
tthatsuppliesthecorelossesThephasorsumofthesetwocompo
e
tsreprese
tsthe
oloadcurre
tor
I0ImIeItshouldr