电动汽车电机驱动系统零转矩充电复用技术简介

Introduction of Integrated Motor Drive-Charger Technologies for Electric Vehicle with Zero Torque

在电动汽车应用中,车载储能电池的充电一般通过充电桩或者车载充电机实现。利用电动汽车的驱动电机及逆变器与电网连接,实现从电网交流电到直流电的电能变换,最终完成对车载储能电池进行充电,可以有效节省硬件和装置建设成本,还能有效提升车载充电容量。但相关策略在实现时,存在的最大挑战是如何抑制由绕组交流电流引起的电机转矩和振动。该文着眼于并网过程中电机的转矩问题,对实现驱动电机逆变器与电网之间可靠电能变换的方法进行了介绍。该文介绍的零转矩并网方法,其核心是结合电机绕组的型式和逆变器的电流控制来调整定子磁动势,从而合理布控电枢反应磁场与永磁磁场的空间关系使其满足零转矩条件。相关工作旨在为电动汽车传导式车载充电提供一种可行的硬件复用方案。

For application in electric vehicle, the high-voltage battery is charged through off-board or on-board battery charger. Utilization of existing traction motor and the inverter to construct AC-DC rectifier can save the hardware effectively and improve the charging power. The challenge of this strategy is how to eliminate the torque and vibration by the winding AC current during connecting to grid. This paper introduces effective methods to eliminate the torque and to make this strategy reliable and practical.The essence of the proposed methods is controlling the magneto-motive force(MMF) and regulating the spatial relationship between armature magnetic field and permanent magnetic field. These works aim to provide practical and effective solutions for on-board charging.