Studying permanent magnet synchronous motor sensorless control technology

Abstract

Because the traditional sensors in PMSM may result in abnormal operation of the entire system, which may affect its reliability, safety, and stability. In this paper, we present the technology for controlling a three-phase PMSM position sensorless system, based on research and analysis. The dq-shaft PMSM mathematical model is first constructed. The fundamental ideas behind SVPWM and vector control are explained. The technique of injecting pulsed high-frequency voltage is investigated, and the response current of PMSM in the high-frequency injection process is calculated. The pulse vibration high-frequency voltage injection-based PMSM sensorless control system block diagram is constructed, and simulation study is conducted. The experimental findings confirm the viability of the control technique in this study since the system has a quick reaction time, high anti-interference ability, and stable operation.

Research on speed sensorless control strategy of permanent magnet synchronous motor based on fuzzy super-twisting sliding mode observer

“…In the process of constructing the surface-mounted PMSM model under ideal conditions, References 38,39 show that the following assumptions are usually made: the saturation of the motor core is neglected; the magnetic circuit is linear, and the inductance parameters remain unchanged; ignoring the hysteresis loss in the motor; the rotor magnetic field distribution is sine wave; the current is symmetrical three-phase sinusoidal current, and there is no damping winding on the rotor.…”