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ID:5296917
大小:1.02 MB
页数:5页
时间:2017-12-07
《自起动永磁同步电机起动过程电枢反应退磁分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第16卷第7期电机与控制学报Vol.16No.72012年7月ELECTRICMACHINESANDCONTROLJuly2012自起动永磁同步电机起动过程电枢反应退磁分析卢伟甫,罗应立,赵海森(华北电力大学电气与电子工程学院,北京102206)摘要:为了研究自起动永磁同步电机起动过程中电枢反应引起的永磁体退磁,采用场-路-运动耦合的时步有限元法,分析了自起动永磁同步电机起动过程中,电枢同步旋转磁场和转子永磁磁场的相对空间位置角δ与电枢电流幅值对永磁体工作点磁密的影响,得到了不同负载条件下的电枢反应退磁特点。结果表明:当相对位置角δ=π时,电枢磁场对永磁磁场的去磁作用较
2、大,永磁体平均工作点磁密较低,且负载系数越大,永磁体经历δ=π时刻的次数越多,永磁体磁密多次出现较低点,永磁体退磁几率变大;起动过程中随着转速升高,电枢电流幅值减小,在接近同步速的δ=π时刻,永磁体磁密出现最低点,电枢反应退磁较严重。关键词:电枢退磁磁场;永磁体工作点磁密;相对位置角δ;电枢电流幅值;时步有限元法中图分类号:TM351文献标志码:A文章编号:1007-449X(2012)07-0029-05Armaturereactiondemagnetizationanalysisforline-startpermanentmagnetsynchronousmotor
3、duringstartprocessLUWei-fu,LUOYing-li,ZHAOHai-sen(SchoolofElectricalandElectronicEngineering,NorthChinaElectricPowerUniversity,Beijing102206,China)Abstract:Toresearchthedemagnetizationofpermanentmagnetcausedbythearmaturereactionduringthestartprocessofline-startpermanentmagnetsynchronousm
4、otor(LSPMSM),thefield-circuit-motioncoupledtime-steppingfiniteelementmethodwasadoptedtoanalyzetheinfluenceofδandthecurrentam-plitudeonthepermanentmagnetworkingpointfluxdensityduringthestartprocessofLSPMSM,whereδwastherelativespacepositionanglebetweentherotorpermanentmagneticfieldandthear
5、maturesyn-chronousrotatingmagneticfield.Thearmaturereactiondemagnetizationcharacteristicsunderdifferentloadconditionsweregained.Resultsshowthatatthemomentofδ=π,thedemagnetizationeffectofthearmaturemagneticfieldonthepermanentmagneticfieldissignificant,andtheaverageworkingpointfluxdensityo
6、fpermanentmagnetislow.However,thepermanentmagnetsuffersmoremomentsofδ=πdur-ingthestartwithheavierload,andthelowerpermanentmagnetfluxdensityappearsmoretimes,whichmakethemagnetdemagnetizationmoreliable.Moreover,thearmaturecurrentamplitudedecreaseswithspeedrising,andthepermanentmagnetfluxde
7、nsityreachesthelowestpointatthemomentofδ=πclosetothesynchronousspeed,wherethearmaturereactiondemagnetizationismoreserious.Keywords:armaturedemagnetizationfield;permanentmagnetworkingpointfluxdensity;relativeposi-tionangleδ;armaturecurrentamplitude;time-steppingfiniteeleme
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