基于Lyapunov函数的永磁同步电机速度控制器设计

传统的PI速度控制器具有速度超调、动态时间长、跟踪精度低、抗负载转矩扰动能力和恢复能力差等缺点。提出了利用永磁同步电机(PMSM)的运动方程和转矩方程推导出控制系统q轴电流给定量,基于Lyapunov稳定性条件设计出的一种PMSM速度控制器。相比于传统的PI速度控制器,该控制器没有速度超调量、动态时间短、跟踪精度高,抗负载扰动能力和恢复能力有一定的提高。利用MATLAB/Simulink仿真软件,搭建控制系统模型并进行仿真分析。仿真验证了提出的PMSM速度控制器的有效性,获得了很好的速度控制性能。

Design of Permanent Magnet Synchronous Motor Speed ControllerBased on Lyapunov Function

The traditional PI speed controller of has the disadvantages of speed overshoot, long dynamic time, low tracking precision, poor ability of load torque disturbance and recovery. A speed controller was proposed. It was based on the motion equation and the torque equation of the permanent magnet synchronous motor to derive the qaxis current of the control system. A speed controller of permanent magnet synchronous motor was designed according to the Lyapunov stability condition. Compared with the traditional PI speed controller, the controller had no speed overshoot, short dynamic time and high tracking precision, and improved ability of load torque disturbance and recovery. By using MATLAB/Simulink simulation software, the control system model was built and the simulation analysis was carried out. Simulation results showed that the speed controller of PMSM was effective, and it could get a good speed control performance.