Sensorless Control of Permanent Magnet Synchronous Motor Based on super-twisting sliding mode observer and Active Disturbance Rejection Controlle

This paper proposes a sensorless control method for Permanent Magnet Synchronous Motors (PMSM) based on the Second-Order Super-Twisting Sliding Mode Observer (STSMO) and Active Disturbance Rejection Controller (ADRC). The study examines the principles and shortcomings of traditional PMSM control and introduces a second-order ADRC control system, which includes the Tracking Differentiator (TD), Extended State Observer (ESO), and Nonlinear Error State Feedback (NLESF). Simulation experiments compare the performance of traditional control methods with the improved ADRC method under various operating conditions. The results show that the ADRC control system based on STSMO significantly outperforms traditional control methods. Specifically, the ADRC method reduces overshoot by approximately 65.52 % and improves steady-state error by about 93.33%. These improvements highlight the potential of ADRC with STSMO for enhancing PMSM performance in practical applications.

I. Introduction

The PMSM has found widespread application in modern industrial control and electric vehicles due to its high efficiency, reliability, and excellent dynamic response. However, traditional PMSM control systems typically rely on position sensors such as encoders or resolvers to acquire rotor position information [1]. This not only increases system costs and complexity but also decreases system reliability and adaptability. Therefore, research on sensorless control techniques, aimed at estimating or observing rotor position information to replace physical sensors, has become one of the current research hotspots [2].