逆变器供电系统下扁线电机绕组交流损耗计算

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DOI：10. 15938/j. emc.2025.05.010

中图分类号：TM351 文献标志码：A 文章编号：1007-449X（2025）05-0099-09

Calculation of AC losses in winding of flat wire motor under inverter power supply system

BIAN Xu'， ZHANG Guoguo¹， LI Xue²， LIANG Yanping' （1.School ofElectricalandElectronic Enginering，Harbin Universityof ScienceandTechnology，Harbin15O080，China; 2.InstituteforAdvanced Materialsand Technology，Universityof Scienceand TechnologyBeijing，Beijing 10o083，China）

Abstract：Concerning the calculation of AC loss in the motor winding with harmonic current within the inverter power supply system，a 60kW permanent magnet synchronous motor（PMSM） was taken as an example and a harmonic current method for calculating the AC loss of the motor winding in the inverter power supply system was put forward. Firstly，the motor stator current under the inverter power supply system was decomposed by means of the harmonic analysis method as the external circuit excitation of the motor finite element model，and the AC loss of the motor winding was computed by adopting the 2D finite element model coupled with the external circuit method. Secondly，a joint simulation was caried out on the finite element model of the PMSM and the inverter drive system controlld by the maximum torque per ampere （MTPA）. The winding currents under three typical working conditions，namely low speed，rated speed，and peak speed of the motor，were acquired through the simulation. Finally，based on the winding currents obtained from the simulation，the AC losses of the three working conditions were calculated using the harmonic current method. The maximum relative error between the calculation results of this calculation method and those of the input method with harmonic current sources is 2.9% ，and the calculation speed is increased by 4 times.Eventually，the validity of the joint simulation and the accuracy of the loss calculation results were verified through the prototype experiment.

Keywords：inverter power supply system； maximum torque per ampere control; permanent magnet synchronous motor；co-simulation；winding AC loss

0引言

近年来，随着双碳目标逐渐成为国际共识，电动汽车已成为新能源发展和应用的重要技术载体[1]永磁同步电机（PMSM）以其高效率、高功率密度，较低制造成本等优点被广泛应用于电动汽车中[2]汽车中的PMSM由电压源逆变器驱动[3]，并通过脉宽调制（PWM）技术进行控制，这使得电机绕组电流中含有一定量的谐波[4]，谐波会使电机绕组产生额外损耗。（剩余9813字）