反凸极永磁同步电机的优化设计与分析

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关键词：反凸极永磁同步电机；转子设计；弧形磁障；结构优化；电感特性DOI：10.15938/j. emc.2025.06.008中图分类号：TM351 文献标志码：A 文章编号：1007-449X（2025）06-0071-09

Optimal design and analysis of negative-saliency permanent magnet synchronous motor

DENG Xianming， TIAN Yunfan， CHEN Chen， ZHANG Yu， DAI Jingui（School of Electrical Engineering，China University of Mining and Technology，Xuzhou 221116，China）

Abstract ： Aiming at the demagnetization problem of permanent magnets in interior permanent magnet synchronous motors，a new structure of negative-saliency pole permanent magnet synchronous motor was proposed.This design solves the problem of excessve magnetic flux density by increasing the angle of the permanent magnets. Meanwhile，arc-shaped magnetic bariers were set on the permanent magnet side and thequadrature axis side of the rotor to reduce the leakage flux between the two poles of the rotor and improve the electromagnetic performance of the motor. Through parametric analysis，the influence of the relevant parameters of the arc-shaped magnetic barriers on the electromagnetic performance of the motor was obtained，making the efect of structural optimization more obvious.Through simulation comparison，it is found that after the structure was optimized，the magnetic flux density between the permanent magnet angles of the motor is 1.2T ，which is less than 1.6 T before optimization； the fundamental no-load back electromotive force is higher than that of the motor before optimization，and all harmonics except the 7th harmonic are less than those of the motor before optimization； the torque ripple is significantly smaller than that of the motor before optimization，and it shows better negative-saliency pole characteristics. Finally，a 1.1kW prototype was built in the laboratory for experiments. The measured direct and quadrature axis inductances are 94.16mH and 80.94mH respectively，and the harmonic distortion rate of the no-load back electromotive force is 10.64% ，verifying its feasibility and superiority.

Keywords： negative-salient permanent magnet synchronous motor; rotor design； arc-shaped magneticbarriers； structural optimization； inductive characteristics

0引言

永磁同步电机较电励磁同步电机省去了电刷和集电环，因结构简单和运行可靠等优点受到广泛应用[1]。（剩余10152字）