基金项目:南京交通职业技术学院科研基金项目(编号:JZ2109)收稿日期:2022-06-15基于扰动观测器的永磁同步电机电流解耦及谐波抑制方法*刘小俊,黄体允,张洪满(南京交通职业技术学院运输管理学院,南京211100)摘要:在永磁同步电机电流环PI调节的矢量控制系统中,udref和uqref尚不能真正实现对d-q轴电流的解耦控制,且由于逆变器的非线性和电机参数的时变性,使得相电流通常存在多种干扰,其表征为电流的谐波。首先建立了永磁同步电机在逆变器的非线性和电机参数的时变性下的实际模型;其次,分析了逆变器非线性及参数时变性的具体扰动模型;最后,提出一种扰动观测器,根据电机d-q轴电压方程,观测耦合项和扰动项,并对其补偿,以实现电流解耦及谐波抑制。通过对提出的扰动观测器的分析,说明了该方法电流解耦及谐波抑制机理,同时也给出了观测器的参数选取和稳定性证明。结果表明加入扰动观测器,实现了d-q轴电流的解耦,并使得A相电流的THD减小了16%,5次和7次谐波分别减小了26%和17%,验证了所提扰动观测器的电流解耦及谐波抑制效果。关键词:永磁同步电机;扰动观测器;谐波抑制;电压补偿;电流解耦中图分类号:TM341文献标志码:A文章编号:1009-9492(2023)03-0168-05CurrentHarmonicSuppressionMethodofPermanentMagnetSynchronousMotorBasedonDisturbanceObserverLiuXiaojun,HungTiyun,ZhangHongman(CollegeofTransportManagement,NanjingVocationalInstituteofTransportTechnology,Nanjing211100,China)Abstract:InthevectorcontrolsystemofpermanentmagnetsynchronousmotorcurrentloopPIregulation,udrefanduqrefcannotreallyrealizethedecouplingcontrolofd-qaxiscurrent.Duetothenonlinearityofinverterandthetime-varyingofmotorparameters,thereareusuallymanykindsofdisturbancesinphasecurrent,whicharecharacterizedbycurrentharmonics.Firstly,thepracticalmodelofpermanentmagnetsynchronousmotorwasestablishedunderthenonlinearityofinverterandthetime-varyingofmotorparameters.Secondly,thespecificdisturbancemodelofinverternonlinearityandtime-varyingparameterswasanalyzed.Finally,adisturbanceobserverwasproposed.Accordingtothed-qaxisvoltageequationofthemotor,thevoltagedisturbancetermandcouplingtermwereobservedandcompensatedtosuppressallkindsofcurrentharmonics.Byanalyzingthepropose...