摘要
永磁容错电机因其良好的容错性能成为目前电动汽车电动助力转向系统转向电机发展的焦点之一,但因为永磁电机存在固有的齿槽转矩,会引起电机的转矩波动,影响电机控制精度和运行稳定性,因此采取有效方法削弱电机的齿槽转矩对提高汽车安全性具有重要意义。本文通过转子分段斜极的方法削弱了半内嵌式永磁容错转向电机的齿槽转矩谐波,同时选取所推导的转子分段斜极的最佳斜极角度,使采用转子分段斜极削弱齿槽转矩的效果达到最佳。本文使用Ansys Maxwell搭建仿真模型进行有限元分析并通过实验进行验证,结果表明采用转子分段斜极并选取最佳斜极角度后半内嵌式永磁容错转向电机的齿槽转矩大大削弱,同时电机的线反电势、电磁转矩等性能均得到改善。
Fault tolerant permanent magnet motor has become one of the focuses of the development of electric power steering system steering motor for electric vehicles because of its good fault-tolerant performance. However, due to the inherent cogging torque of permanent magnet motor, it will cause the torque ripple of the motor and affects the control accuracy and operation stability of the motor. Therefore, it is of great significance to take effective methods to reduce the cogging torque of the motor to improve the safety of the vehicle.The cogging torque harmonics of the semi-embedded fault tolerant permanent magnet steering motor are reduced by the method of step skewing of rotor. At the same time, select the optimal step skewing angle of the step skewing of rotor so that the effect of reducing the cogging torque by using the step skewing of rotor could achieve the best. Use Ansys Maxwell to build a simulation model for finite element analysis and verify it through experiments. The results show that the cogging torque of the semi-embedded fault tolerant permanent magnet steering motor is greatly reduced after step skewing of rotor and the optimal step skewing angle are selected. At the same time, the line back EMF, electromagnetic torque and other properties of motor have been improved.
作者
马凯
蒋雪峰
刘洪波
王思远
Ma Kai;Jiang Xuefeng;Liu Hongbo;Wang Siyuan(School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《科技通报》
2023年第2期49-56,共8页
Bulletin of Science and Technology
基金
江苏省研究生科研与实践创新计划项目(SJCX21_0131)
关键词
电动汽车
半内嵌式
永磁容错转向电机
齿槽转矩
转子分段斜极
斜极角度
electric vehicles
semi-embedded
fault tolerant permanent magnet steering motor
cogging torque
step skewing of rotor
step skewing angle
