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时间:2020-04-20
《永磁同步电机不对称运行负序分量特性分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第51卷第l6期电测与仪表V01.51No.162014生8月25日ElectricalMeasurement&InstrumentationAug.25.2O14永磁同步电机不对称运行负序分量特性分析木张志艳,马宏忠1钟钦,赵利军。,(1.河海大学能源与电气学院,南京211100;2.郑州轻工业学院电气信息工程学院,郑州450002;3.国家电网平高集团有限公司科技部,河南平顶山467001)摘要:定子故障、转子故障以及其它原因均有可能引起永磁同步电机定子不对称运行,以往文献更多关注于常规电机某种故障下的负序电流分量,并未
2、对负序分量进行全面的分析。以电动汽车驱动用永磁同步电机作为研究对象,建立了其仿真模型和实验平台,对定子绕组三相不平衡故障引起的不对称运行状态下的负序电流和负序阻抗进行了较为深入的研究。实验和仿真分析结果表明,随着故障不平衡度的增加,非故障相之间的夹角越来越偏离120。;故障状态下的负序电流远大于正常运行时的负序电流;故障状态下的负序阻抗远小于正常运行时的负序阻抗,且具有一定的鲁棒性。这些结论的获得为基于负序分量的永磁同步电机故障下的诊断提供了研究基础。关键词:永磁同步电机;负序电流;负序阻抗;故障;不对称中图分类号:TM35
3、1文献标识码:A文章编号:1001—1390(2014)16—0046—05NegativeSequenceComponentCharacteristicsAnalysisofPMSMunderAsymmetryOperationConditionZHANGZhi—y,MAHong-zh。ng,ZHONGQin,ZHAOLi-jun。(1.CollegeofEnergyandElectricalEngineering,HohaiUniversity,Nanjing210098,China.2.CollegeofElectri
4、calInformationEngineering,ZhengzhouUniversityofLightIndustry,Zhengzhou450002,China.3.StateGridPinggaoGroupCo.Ltd.MinistryofScienceandTechnology,Pingdingshan467001,Henan,China)Abstract:Statorfault,rotorfaultandotherfaultsarelikelytocausepermanentmagnetsynchronousmot
5、or(PMSM)asymmetricoperation,whichresultsnegativesequencecomponent.Intheexistingliteratures,theyfocusmoreonnegativesequencecurrentresultingfromacertainfaultoftheconventionalmotorfault,andfocuslittleonacomprehensiveanalysisofthenegativesequencecomponent.Inthispaper,t
6、hesimulationmodelandexperimentalplatformoftheelectricvehicledrivemotorisestablishedastheresearchobject,inordertofurtherstudynegativesequencecurentandnegativesequenceimpedanceunderasymmetryoperationconditioncausedbythestatorwindingsofthreephaseunbalanced.Theexperime
7、ntalandsimulationresultsshowthattheanglebetweennon-faultphasedeviatesmorefrom120。alongwiththeincreaseofPMSMunbalanceddegree;thenegativesequencecurrentunderfaultconditionisfargreaterthanthenegativesequencecurrentduringnormaloperation;thenegativesequenceimpedanceunde
8、rfaultconditionisfarlessthanthenormaloperationandhavemorerobustness.Theseconclusionsprovidethebasisforthestudyofpermanentmagnetsynchronousmotorfa
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