Anti-Integral Saturation-based Control Technology in PMSM High Frequency Injection

Abstract

In sensorless low-speed control of built-in permanent magnet synchronous motor (IPMSM) based on the traditional high-frequency injection method, the current regulation process has integral saturation, leading to slow desaturation and overcharge acceleration. In order to solve this problem, the mechanism of its occurrence is analyzed and studied in detail. An anti-saturation control algorithm is proposed herein to integrate the control input saturation error and add it to the integral term of PI through an adaptive system. The simulation experiment results show that the method can effectively reduce the overshoot of the speed control system, shorten the system stability time, and at the same time increase the system robustness to the load disturbance.