开关磁阻电机直接转矩控制系统与故障诊断研究.pdfVIP

Abstract

Basedontheadvantagesofsimplestructure,largespeedregulationrange,flexible

andconvenientcontrolmodeandgoodeconomy,themultiphaseswitchedreluctance

motors(SRM)arewidelyusedinhouseholdappliances,aviationandelectricvehicles.Itis

preciselybecausetheeconomyofSRMsystemishigherthanothermotorssotheSRM

hasbecomethefirstchoiceofelectricvehicledrivemotor.SRMsystemhasavarietyof

controlmethods,includingthetraditionalcontrolmethodsandadvancedcontrol

developedinrecentyears.Thispaperfocusesonthestudyofdirecttorquecontrol(DTC),

theadvancedcontrolmethodofSRMsystem.Inthissystem,theswitchingdeviceusedin

thepowerconverterisIGBT.WhentheIGBTfails,itwillaffecttheoperationoftheentire

system.Therefore,theresearchonthefailureoftheswitchingdeviceIGBTofthepower

converteralsohascertainpracticalsignificance.Theinnovationandmainworkofthis

paperincludethefollowingaspects:

(1)ThemathematicalmodelofmultiphaseSRMisestablished,andthethree-phase

6/4SRMmodelisestablishedbyusingANSOFTfiniteelementsimulationsoftware.By

analyzingthemodeldata,theflux-position-currentcharacteristiccurveofthemotoris

obtained,whichprovidesdetaileddatasupportforthenonlinearmodelofSRM.

(2)Theapplicationoftwomethodsofmulti-phaseSRMsystemisanalyzedand

verified:traditionalcontrolmethod-currentchoppercontrol(CCC)andadvancedcontrol

method-DTC.Thechangesofspeedandtorqueinthestartingprocessandthesteadystate

processunderdifferentcontrolmodesareobtained.Theresultsshowthattheeffectof

reachingth