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ID:40893616
大小:2.71 MB
页数:9页
时间:2019-08-10
《Design Analysis of Multiphase DC》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、136IEEETRANSACTIONSONINDUSTRYAPPLICATIONS,VOL.IA-8,NO.2,MARCH/APRIL1972DesignAnalysisofMultiphaseDCChopperMotorDriveEBERHARTREIMERSAbstract-DCchopperpropulsionspeedcontrolisattainedbyasolid-stateswitchwhosevariableon-offdutycycletransfersaproportionalquantityofpulsedenergyintoamoto
2、r.Thepulsedbatterycurrentisalternatelystoredandexpendedwithinthedcmotoranditsseriesconnecteddcchokeduringeachperiodofconductionandsucceedingfreewheelingoperatingmode.Henceanenergytransferismaintainedtransformingahighvoltagelowdcsupplyintoalowervoltagehigherdcdemandingload.Thetrans-
3、formationratioisconsideredacontrolledvariablebysimplycon-trollingtheon-offconductiondutycycleofitssolid-stateswitch.Thissimplisticapproach,however,failstorecognizethatthein-stantaneousbatterycurrentamplitudeequalsthemotorcurrentdemandduringtheswitch"on"periodresultinginpotentiallyv
4、erylargepeakpowerdemands[1].Propulsionsystempowerdesignrequiresanefficientpowertransferfromthesourcetotheloadunderallspeedconditionstoattainmaximumperformanceatlowestsystemweightandcost.Thisrequirementcloselyinterrelateswithtotalsourcepowerconversionefficiencyindependentlyofthesour
5、cewhichmaybeabattery,afuelcell,orahybridsystem,suchasaturbinedrivengeneratorandabattery.Poorfueleconomyfornormaloperationorf()=G21s+2_s(n8W)cosnwc6-.)anexcessivewattlosswithinthebatterywhenoperatingunder"silentpower"vehiclemissions,severelyinhibitstheusefulnessn=1oftheconventionald
6、cchoppermotordriveintermsofoptimized01--'-SECONDSoverallperformance.AchangeofcircuitconfigurationandexpansionofthedriveFig.1.Basicdcchoppercircuitwaveform.conceptwithoutincreasingcost,resultsintrueinstantaneouscurrenttransformationandgreatlyenhancesperformanceoftheproposeddrive.Thi
7、smaybeaccomplishedintwoways:1)withanenergyINTRODUCTIONstoragefilterbetweenbatterysourceanddcchopper,and2)withasequentiallyswitchedmultiphasechoppercontainingindividualATTHEINSTANTofclosingswitchSi(Fig.1)fordcreactorsandfreewheelingdiodecurrentpaths.Mostlikely,athefirsttime,theentir
8、echoppersupplyvoltagecombi
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