EPS用PMSM弱磁控制方法与实现

Research on PMSM Flux-Weakening Control and Its Application in EPS

针对汽车在紧急避障等工况下,驾驶员快速转方向盘时手感沉重问题,根据电动助力转向系统用永磁同步电机调速,设计超前角弱磁控制方法。电机转速在基速以下时采用id=0控制,电机在高转速下用弱磁控制,并用Matlab/Simulink进行了系统仿真验证。仿真结果表明,本弱磁控制方法能够有效地减少方向盘转矩,提高电机转速。

In view of the current flaw that drivers feel clumsy when turning the steering wheel quickly in case of emergency obstacle avoidance,the design method of lead angle flux weakening control has thus been designed,based on the permanent magnet synchronous motor(PMSM)speed regulation for electric power steering system(EPS).id=0control is to be adopted when the motor speed is below the base speed,with the motor controlled by flux weakening at high speed,followed by a system simulation verification of the results by using Matlab/Simulink.The simulation results show that the flux weakening control method can effectively reduce the steering wheel torque and improve the motor speed.