基于自适应模糊PI的PMSM定子电流最优控制

根据永磁同步电动机(Permanent Magnet Synchronous Motor,简称PMSM)的数学模型和转子磁场定向控制策略,建立了采用定子电流最优控制的PMSM驱动系统。利用模糊控制构建自适应模糊PI控制器,实现转速和电流双闭环控制,提高了系统的动态和稳态性能。为使电动机在整个运行速度范围内能输出最大功率,采用交轴电流参考由模糊PI环节给出,直轴电流参考分段,即恒转矩、弱磁扩速及恒功率段,计算给出定子电流最优算法。实验结果表明,基于模糊PI控制的系统模型具有动态响应快、稳态精度高及抗干扰能力强等优点。

The Optimum Current Vector Control of Permanent Magnet Synchronous Motor Based on Self-adaptive Fuzzy PI

This paper establishes a permanent magnet synchronous motor(PMSM) drive system,which based on the mathematical model of PMSM in the magnetic field oriented control strategy.Using adaptive PI controller constructed by fuzzy control in achieving speed and current double closed-loop,the dynamic and static performance of this system has been improved.In order to keep the output power maximum in the whole speed range,the optimal stator current vector control is adopted,which the d-axis current reference is calculated by constant torque,flux-weaken and constant power in paragraph and the q-axis current reference is provided by the fuzzy PI.The experimental results show that the system model based on self-adaptive fuzzy PI control has fast response,high accuracy and good anti-jamming capability and so on.