逆变器外文文献资料翻译.doc

《逆变器外文文献资料翻译.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Inverter1IntroductionAninverterisanelectricaldevicethatconvertsdirectcurrent(DC)toalternatingcurrent(AC);theconvertedACcanbeatanyrequiredvoltageandfrequencywiththeuseofappropriatetransformers,switching,andcontrolcircuits.Solid-stateinvertershavenomovingpartsandareusedinawiderangeofa

2、pplications,fromsmallswitchingpowersuppliesincomputers,tolargeelectricutilityhigh-voltagedirectcurrentapplicationsthattransportbulkpower.InvertersarecommonlyusedtosupplyACpowerfromDCsourcessuchassolarpanelsorbatteries.Therearetwomaintypesofinverter.Theoutputofamodifiedsinewaveinvert

3、erissimilartoasquarewaveoutputexceptthattheoutputgoestozerovoltsforatimebeforeswitchingpositiveornegative.Itissimpleandlowcostandiscompatiblewithmostelectronicdevices,exceptforsensitiveorspecializedequipment,forexamplecertainlaserprinters.Apuresinewaveinverterproducesanearlyperfects

4、inewaveoutput(<3%totalharmonicdistortion)thatisessentiallythesameasutility-suppliedgridpower.ThusitiscompatiblewithallACelectronicdevices.Thisisthetypeusedingrid-tieinverters.Itsdesignismorecomplex,andcosts5or10timesmoreperunitpowerTheelectricalinverterisahigh-powerelectronicoscilla

5、tor.ItissonamedbecauseearlymechanicalACtoDCconvertersweremadetoworkinreverse,andthuswere"inverted",toconvertDCtoAC.Theinverterperformstheoppositefunctionofarectifier.2Applications2.1DCpowersourceutilizationAninverterconvertstheDCelectricityfromsourcessuchasbatteries,solarpanels,orfu

6、elcellstoACelectricity.Theelectricitycanbeatanyrequiredvoltage;inparticularitcanoperateACequipmentdesignedformainsoperation,orrectifiedtoproduceDCatanydesiredvoltageGridtieinverterscanfeedenergybackintothedistributionnetworkbecausetheyproducealternatingcurrentwiththesamewaveshapeand

7、frequencyassuppliedbythedistributionsystem.Theycanalsoswitchoffautomaticallyintheeventofa10blackout.Micro-invertersconvertdirectcurrentfromindividualsolarpanelsintoalternatingcurrentfortheelectricgrid.Theyaregridtiedesignsbydefault.2.2UninterruptiblepowersuppliesAnuninterruptiblepow

8、ersupply(UPS)usesba