文章编号：1009−444X（2022）04−0369−09基于分层优化策略的永磁同步电机转子结构多目标优化杨尚明，马其华（上海工程技术大学机械与汽车工程学院,上海201620）摘要：永磁同步电机对转矩输出的平滑性有较高要求.内置式永磁同步电机受齿槽转矩、磁阻转矩脉动、电磁转矩脉动等因素影响，输出转矩脉动相对较大，增加了电磁噪声和输出的不稳定性.基于一台20kW永磁同步电机建立有限元模型，验证模型的准确性.以电机最大输出转矩、最小转矩脉动、最小齿槽转矩为优化目标，对电机转子结构参数进行灵敏度分析，并综合NSGA−Ⅱ算法和单变量参数法进行分层优化.与单层优化相比，分层优化对易受变量影响的目标提升效果更好.声学仿真验证了优化后的转子结构对电磁噪声改善效果显著.关键词：内置式永磁同步电机；多目标优化；参数灵敏度分层；NSGA−Ⅱ算法中图分类号：TM351文献标志码：AMulti-objectiveoptimizationofPMSMrotorstructurebasedonstratifiedoptimizationstrategyYANGShangming，MAQihua（SchoolofMechanicalandAutomotiveEngineering,ShanghaiUniversityofEngineeringScience,Shanghai201620,China）Abstract：Thepermanentmagnetsynchronousmotor(PMSM)hasahighrequirementonthesmoothnessoftorqueoutput.Duetoinfluencesofgroovetorque,reluctancetorquepulsation,electromagnetictorquepulsationandotherfactors,theoutputtorquepulsationoftheinteriorPMSMisrelativelylarge,whichincreaseselectromagneticnoiseandoutputinstability.Afiniteelementmodelwasestablishedbasedona20kWPMSM,andtheaccuracyofthemodelwasverified.Takingthemaximumoutputtorque,theminimumtorquepulsationandtheminimumslottorqueasoptimizationobjectives,thesensitivityanalysisofrotorstructureparameterswascarriedout,andthestratifiedoptimizationwascarriedoutbycombiningNSGA−Ⅱalgorithmandsinglevariableparametermethod.Comparedwithsingle-layeroptimization,stratifiedoptimizationhasabettereffectonthetargetwhichissusceptibletovariables.Theacousticsimulationshowsthattheoptimizedrotorstructurecanimproveelectromagneticnoisesignificantly.Keywords：interiorpermanentmagnetsynchronousmotor(PMSM)；multi-objectiveoptimization；parametersensitivestratification；NSGA−Ⅱalgorithm收稿日期：2022−01−12基金项目：国家自然科学...
