【摘要】 针对永磁同步电机(PMSM)矢量控制系统的速度环采用PI调节器不能很好地适应电机参数变化而导致控制效果不理想的问题,在电流预测控制(CPC)增强抗干扰能力、提高鲁棒性的基础上,提出了一种滑模控制方法.该滑模与电流预测相结合的控制方法改善了永磁同步电机矢量控制系统的动态性能,实现了负载扰动时调速响应快且无超调控制,提高了系统对内部电阻变化的容忍度.仿真结果表明,采用该方法,系统的响应速度和稳定性均得到改善,转速响应从启动到稳定所用时间减小60%.更多还原

【Abstract】 Aiming at the problem that the speed loop of the permanent magnet synchronous motor vector control system adopts the PI regulator cannot adapt to the change of the motor parameters well,the control effect is not ideal.On the basis of the current predictive control( CPC) heightening the anti-interference ability and improving robustness,a sliding mode control method is proposed. The control method combining sliding mode and current prediction improves the dynamic performance of the permanent magnet synchronous motor vector control system,realizes fast speed regulation response when the load is disturbed and no overshoot control; and improves the system’s tolerance to internal resistance changes. The model of the permanent magnet synchronous motor vector control system is built in Simulink. The simulation results show that under the control of the method in this paper,the response speed and stability of the system are improved,and the time taken for the speed response from starting to stable is reduced by60%.更多还原