新型调制齿结构内置式轮毂电机设计分析与转矩脉动优化

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Design analysis and torque ripple optimization of novel modulated tooth structure internal hub motor

XIE Ying'， XIAO Zhibo'， CAI Wei¹， ZHANG Zeyang² （1.School ofElectricalandElectronic Enginering，Harbin Universityof Sienceand Technology，Harbin15O08o，China; 2.Dongfeng Motor Group Corporation Limited R&D Institute，Wuhan 43Oo58，China）

Abstract：The wheel hub motor has become a research hotspot in the drive system of new energy vehicles due to its advantages of high power density and space utilization. However， its wheel hub integration characteristics put forward higher requirements for the suppression of torque ripple during motor operation. A built-in permanent magnet synchronous wheel hub motor with a rated power of 46kW and a peak power of 114kW were designed. Aiming at the problem of large torque ripple，the influence of the statorrotor topology on the motor torque ripple was first analyzed and preliminarily optimized. On this basis，a new non-uniform magnetic field modulating tooth topology was proposed based on the air-gap magnetic field modulation principle，and the size parameters of the modulating teeth are optimized using a modern particle swarm optimization algorithm to further reduce the motor torque ripple. The electromagnetic performance of the motor was analyzed by the finite element method. The results show that the optimized motor not only meets the index requirements，but also underthe same excitation conditions，the rated torque is increased from the original 161.00N⋅m to 172.11N⋅m ，and the torque ripple is reduced from 5.16% to 1.76% ，significantly improving the motor performance.

Keywords：permanent magnet synchronous hub motor； taguchi method； magnetic field modulation tooth ;particle swarm optimization algorithm； torque ripple

0引言

如今，社会对能源与环境问题的关注日益增加，国家正在大力推动新能源汽车产业发展，这已成为战略规划的重要组成部分[1]。（剩余11882字）