微特电机 ›› 2021, Vol. 49 ›› Issue (3): 33-35.

• 设计分析 • 上一篇    下一篇

车载永磁同步电机系统偏磁问题及补偿

朱相军, 罗建武, 徐刚, 饶健, 许心一   

  1. 东风汽车集团股份有限公司技术中心,武汉 430000
  • 收稿日期:2020-04-23 出版日期:2021-03-28 发布日期:2021-04-02
  • 作者简介:朱相军(1994—),男,本科,责任工程师,主要从事新能源汽车电机控制算法方面的工作。

Magnetic Deviation and Compensation of Permanent Magnet Synchronous Motor System

ZHU Xiang-jun, LUO Jian-wu, XU Gang, RAO Jian, XU Xin-yi   

  1. Dongfeng Motor Corporation Technical Center, Wuhan 430000, China
  • Received:2020-04-23 Online:2021-03-28 Published:2021-04-02

摘要: 车载电驱动系统的偏磁问题严重影响到车辆EMC,NVH等性能。整改电动汽车EMC问题和提高整车驾驶体验都具有重要意义。分析了永磁同步电机系统偏磁产生的几种主要原因,并以系统电流传感器测量量为偏磁状态量进行提取,增加软件调制策略补偿量以改善系统偏磁。该偏磁算法有效降低系统局部发热和扭矩稳态波动,提高了电流利用率和电机系统效率。

关键词: 永磁同步电机, 非对称直流偏磁, 磁场耦合, 直流分量, PWM调制

Abstract: The magnetic bias of vehicle electric drive system seriously affects the performance of vehicle EMC and NVH. It is of great significance for the EMC problem rectification of electric vehicles and the improvement of vehicle driving experience. Several main reasons for the generation of magnetic deviation of permanent magnet synchronous motor (PMSM) system was analyzed, The magnetic bias was extracted from the measured quantity of the system current sensor, and the compensation quantity was added to the software modulation strategy to improve the system's magnetic bias. The magnetic bias algorithm can effectively reduce local heat and steady state fluctuation of torque, and improve current utilization and system efficiency.

Key words: permanent magnet synchronous machine(PMSM), asymmetric DC bias, magnetic coupling, DC component, PWM modulation

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