电动车用永磁同步电机矢量控制策略

Vector Control Strategy of Permanent Magnet Synchronous Motor in Electric Vehicle

为了提高电机控制系统的性能,该文选择高性能的矢量控制技术,并针对电动车驱动电机在基速以下的恒转矩和基速以上的恒功率输出特性,分别采用定子电流在d轴的分量为0和弱磁控制2种方式,运用MATLAB/Simulink软件对其矢量控制系统进行仿真分析。仿真结果表明:控制系统的鲁棒性好且动态响应迅速,弱磁控制电机调速范围提升明显,速度响应快,满足电动汽车的超车需求。该矢量控制系统对电动车整个电控系统的开发具有一定的理论指导意义。

In order to improve the motor control system performance, the vector control will be used. Based on the output characteristic of drive motor on a electric vehicle, which requires constant torque control while the speed is below the base speed and constant power control while the speed is above the base speed, control strategy and flux-weaken control strategy will be used respectively. The model of the vector control system has been constructed with Matlab/Simulink. The simulation result shows that the control system has good robustness and quick dynamic response, the adjustable rang of the speed is obviously increased and the speed reaction is very quick with this flux-weaken control strategy, meeting the overtaking requirements of the electric vehicle. The vector strategy will give some guideline on the development of permanent magnet synchronous motor control system.