電動汽車用內(nèi)嵌式不等厚磁極永磁驅(qū)動電機的優(yōu)化與分析

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中圖分類號：TM351 文獻標識碼：A DOI：10.7535/hbkd.2025yx04003

Optimization and analysis of interior permanent magnet drive motor with unequal thickness magnetic poles for electric vehicle

MA Shilun1'2，WU Yongyi1，LI Changwei1，CHEN Keqi （1.SchoolofAutomobileandTransportation，Tianjin UniversityofTechnologyandEducation，Tianjin300222，China; 2.Tianjin ZhengHan Technology Company Limited，Tianjin 3ool31，China）

Abstract：To enhance theoutput torque of permanent magnet drive motors for electric vehicles，while simultaneously reducingcogging torqueandtorque ripple，an interiorpermanent magnet motor with auxiliary slotsin unequal thickness magnetic poles wasproposed.Firstly，byanalyzing thegeometricrelationshipsof unequal thickness magnetic poles，a mathematical modelrelating theradialairgap magnetic flux densityof therotortothe magneticpoleparameters was established.Secondly，usingtheenergymethodandFourieranalysismethod，therelationshipexpresionbetweenrotor magneticpolesandcoging torquewasformulated，deriving theinfluencingfactorsof unequal thicknessmagneticpolesand rotorauxiliary slotsoncogging torque.Additionall，ananalytical expression forthe motor's quadratureanddirect-axis inductance wasestablishedthroughtheequivalent magneticcircuitmethod，obtainingparametersthatindicatetheffectsof unequalthickness magnetic poles androtorauxiliaryslots onoutput torque.Finally，with torqueripple，cogging torque，and outputtorqueasoptimization objectives，the particle swarmoptimization algorithm was used toperform multi-objective optimizationonthe maximum magneticpolethickness，minimum magneticpole thickness，thewidthof magnetic pole，the depth and widthof therotorauxiliaryslots，inordertodeterminetheoptimalparameters，andaprototype wasthendeveloped for experimental testing. The results indicate that the optimized motor has reduced torque ripple by 13.76% ，decreased cogging torque by 51.7% ，and increased output torque by 14.2% ，validating the correctness of the theoretical calculations and simulation analysis.Theproposed novel topology structureand itsoptimization designmethodcanefectivelyenhance the output characteristics，providing certain theoretical references for the drive motor used in electric vehicles.

Keywords：electrical machinery； electric vehicles；permanent magnet drive motor;unequal thicknessmagnetic poles；rotor slotting；multi-objective optimization

隨著汽車工業(yè)的快速發(fā)展，環(huán)境污染和能源短缺兩大全球性問題日益嚴重。（剩余12384字）