变压器--毕业论文外文翻译

《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.Itconsistsoftwoormorecoilswirewrappedaroundacommonferrom

2、agneticcore.Thesecoilsare(usually)notdirectlyconnected.Theonlyconnectionbetweenthecoilsisthecommonmagnecticfluxpresenwithinthecore.Oneofthetransformerwindingsisconnectedtoasourceofacelectricpower,andthesecond(andperhapsthird)transformerwindingsupplieselectricpowertoloads.

3、thetransformerwindingconnectedtothepowersouceiscalledtheprimarywindingorinputwinding.andthewindingconnectedtotheloadsiscalledthesecondarywindingorinputwinding.Ifthereisathirdwindingonthetransformer,itiscalledthetertiarywinding.Powertransformerareconstructedononeoftwotypes

4、ofcores.onetypeofconstructionconsistsofasimplerectangularlaminatedpieceofsteelwiththetransformerwindingswrappedaroundtwosidesoftherectangle.Thistypeofconstructionisknowascoreform.Theothertypeconsistsofthree-leggedlaminatedcorewiththewindingswrappedaroundthecenterleg.Thist

5、ypeofconstructionisknowasshellform.Ineithercase,thecoreisconstructedofthinlaminationselectricallyisolatedformeachotherinorderinordertoreduceeddycurrentstoaminimum.Theprimaryandsecondarywindingsinaphysicaltransformerarewrappedoneontopoftheotherwiththelow-voltagewindinginne

6、rmost.Suchanarrangementseverstwopurposes:1.Itsimplifiestheproblemofinsulatingthehigh-voltagewindingfromthecore.2.Itresultsinmuchlessleakagefluxthanwouldbethetwowindingswereseparatedbyadistanceonthecore.Powertransformeraregivenavarietyofdifferentnames,dependingontheirusein

7、powersystems.Atransformerconnectedtotheoutputofageneratorandusedtostepitsvoltageuptotransformerlevelsissometimescalledunittransformer.Thetransformeraitheotherendofthetransformerline,whichstepsthevoltagedownfromtransmissionlevelstodistributionlevels,iscalledasubstationtran

8、sformer.Finally,thetransformerthattakesthedistributionvoltageandstepsisdowntothefinalvoltageaiwh