改进的脉振高频注入永磁同步电动机无传感器控制

Improved sensorless control for pulsating high frequency signal injection of permanent magnet synchronous motor

针对脉振高频注入法中滤波器相位滞后影响系统动态性能的问题,本文从控制器角度入手,将模型预测控制(MPC)引入速度环替代比例积分(PI)控制,利用其滚动优化和反馈校正的特点提高系统的动态性能,同时对常用的MPC进行改进以获得更好的控制性能。为了获取更好的抗负载扰动能力,采取负载转矩补偿策略,分析传统的q轴参考电流前馈补偿在MPC下存在的问题,提出一种基于q轴参考电压的新补偿法,获得了更好的补偿效果。

In view of the problem that the phase lag of the filter affects the dynamic performance of the system in the pulsating high frequency signal injection method,this paper starts from the controller point of view,and introduces the model predictive control(MPC) into the velocity loop instead of proportional integral(PI) control,using its rolling optimization and feedback correction characteristics to improve the dynamic performance of the system.At the same time,the commonly used MPC is improved to obtain better control performance.In order to obtain better anti-load disturbance capability,the load torque compensation strategy is adopted to analyze the existing problems of the traditional q-axis reference current feedforward compensation under MPC,and a new compensation method based on the q-axis reference voltage is proposed to obtain better compensation effect.