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ID:34154058
大小:72.40 KB
页数:13页
时间:2019-03-04
《毕业论文外文翻译-逆变器》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、Inverter1IntroductionAninverterisanelectricaldevicethatconvertsdirectcurrent(DC)toalternatingcurrent(AC);theconvertedACcanbeatanyrequiredvoltageandfrequencywiththeuseofappropriatetransformers,switching,andcontrolcircuits.Solid-stateinvertershavenomovingpartsandareusedinawiderangeofa
2、pplications,fromsmallswitchingpowersuppliesincomputers,tolargeelectricutilityhigh-voltagedirectcurrentapplicationsthattransportbulkpowe匚InvertersarecommonlyusedtosupplyACpowerfromDCsourcessuchassolarpanelsorbatteries.Therearetwomaintypesofinverte匸Theoutputofamodifiedsinewaveinverter
3、issimilartoasquarewaveoutputexceptthattheoutputgoestozerovoltsforatimebeforeswitchingpositiveornegative.Itissimpleandlowcostandiscompatiblewithmostelectronicdevices,exceptforsensitiveorspecializedequipment,forexamplecertainlaserprinters.Apuresinewaveinverterproducesanearlyperfectsin
4、ewaveoutput(<3%totalharmonicdistortion)thatisessentiallythesameasutility-suppliedgridpower.ThusitiscompatiblewithallACelectronicdevices.Thisisthetypeusedingrid-tieinverters.Itsdesignismorecomplex,andcosts5or10timesmoreperunitpowerTheelectricalinverterisahigh-powerelectronicoscillato
5、r.ItissonamedbecauseearlymechanicalACtoDCconvertersweremadetoworkinreverse,andthuswereHinverted,toconvertDCtoAC.Theinverterperformstheoppositefunctionofarectifie匚2Applications2.1DCpowersourceutilizationAninverterconvertstheDCelectricityfromsourcessuchasbatteries,solarpanels,orfuelc
6、ellstoACelectricity.Theelectricitycanbeatanyrequiredvoltage;inparticularitcanoperateACequipmentdesignedformainsoperation,orrectifiedtoproduceDCatanydesiredvoltageGridtieinverterscanfeedenergybackintothedistributionnetworkbecausetheyproducealternatingcurrentwiththesamewaveshapeandfre
7、quencyassuppliedbythedistributionsystem.Theycanalsoswitchoffautomaticallyintheeventofablackout.Micro-invertersconvertdirectcurrentfromindividualsolarpanelsintoalternatingcurrentfortheelectricgrid.Theyaregridtiedesignsbydefault.1.1UninterruptiblepowersuppliesAnuninterruptiblepowersup
8、ply(UPS)usesbatteri
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