基于PR控制的永磁同步电机SVPWM仿真研究

Research on SVPWM Simulation of Permanent Magnet Synchronous Motor Based on PR Control

针对传统PI控制对交流信号跟踪能力差的问题,研究了一种改进型比例谐振(PR)控制算法,并将其引入到永磁同步电机控制系统中。用改进型PR控制器替代传统的PI控制器,可以减少一次Park坐标变换,并能实现对交流信号的无静差跟踪。在Matlab/Simulink中搭建基于PR控制的永磁同步电机SVPWM仿真模型,仿真结果表明:引入改进型PR控制器后的永磁同步电机系统不但能够实现对交流输入信号的无静差跟踪,而且可以有效地对特定低次谐波进行抑制,对改善输出电流畸变率和降低转矩脉动具有明显效果。

Aiming at the problem of poor tracking ability of traditional PI control for AC signals, an improved proportional resonant (PR) control algorithm is studied and introduced into permanent magnet synchronous motor control system. With the improved PR controller instead of the traditional PI controller, the Park coordinate transformation can be reduced and the static error tracking of the AC signal can be realized. The simulation model of SVPWM based on PR control is built in Matlab/ Simulink. The simulation results show that the permanent magnet synchronous motor system based on PR controller can not only realize no-static tracking for AC input signal, but also can suppress certain low-order harmonics effectively, to improve the output current distortion rate and reduce the torque ripple has obvious effect.