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ID:240411
大小:36.50 KB
页数:4页
时间:2017-07-12
《变压器 毕业论文外文翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、英文资料及其翻译TransformerTypesandConstructionofTransformerAtransformerisadevicethatalternatingcurrentelectricenergyatonevoltagelevelintoalternatingcurrentelectricenergyatanothervoltagelevelthroughtheactionofamagneticfield.Itconsistsoftwoormorecoilswirewrappedaroundacommonferromagneticcore.Thesecoilsare(
2、usually)notdirectlyconnected.Theonlyconnectionbetweenthecoilsisthecommonmagnecticfluxpresenwithinthecore.Oneofthetransformerwindingsisconnectedtoasourceofacelectricpower,andthesecond(andperhapsthird)transformerwindingsupplieselectricpowertoloads.thetransformerwindingconnectedtothepowersouceiscalle
3、dtheprimarywindingorinputwinding.andthewindingconnectedtotheloadsiscalledthesecondarywindingorinputwinding.Ifthereisathirdwindingonthetransformer,itiscalledthetertiarywinding.Powertransformerareconstructedononeoftwotypesofcores.onetypeofconstructionconsistsofasimplerectangularlaminatedpieceofsteel
4、withthetransformerwindingswrappedaroundtwosidesoftherectangle.Thistypeofconstructionisknowascoreform.Theothertypeconsistsofthree-leggedlaminatedcorewiththewindingswrappedaroundthecenterleg.Thistypeofconstructionisknowasshellform.Ineithercase,thecoreisconstructedofthinlaminationselectricallyisolate
5、dformeachotherinorderinordertoreduceeddycurrentstoaminimum.Theprimaryandsecondarywindingsinaphysicaltransformerarewrappedoneontopoftheotherwiththelow-voltagewindinginnermost.Suchanarrangementseverstwopurposes:1.Itsimplifiestheproblemofinsulatingthehigh-voltagewindingfromthecore.2.Itresultsinmuchle
6、ssleakagefluxthanwouldbethetwowindingswereseparatedbyadistanceonthecore.Powertransformeraregivenavarietyofdifferentnames,dependingontheiruseinpowersystems.Atransformerconnectedtotheoutputofageneratorandusedtostepitsvoltageuptotransformerlevelsissometimescalledunittransformer.Thetransformeraitheoth
7、erendofthetransformerline,whichstepsthevoltagedownfromtransmissionlevelstodistributionlevels,iscalledasubstationtransformer.Finally,thetransformerthattakesthedistributionvoltageandstepsisdowntothefinalvoltageaiwh
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