Research on an Improved Sliding Mode Sensorless Six-Phase PMSM Control Strategy Based on ESO

• DOI: 10.3390/electronics10111292
• Publication Date: 2021-05-28T15:33:20Z
• Authors: Hanying Gao; Guoqiang Zhang; Wenxue Wang; Xuechen Liu
• Keywords: Counter-electromotive force; Torque ripple; Observer (physics); Synchronous motor

The six-phase motor control system has low torque ripple, harmonic content, and high reliability; therefore, it is suitable for electric vehicles, aerospace, other applications requiring power output reliability. This study presents a superior sensorless permanent magnet synchronous (PMSM). mathematical model of PMSM in stationary coordinate presented. information speed position obtained by using sliding mode observer (SMO). As ripple components affect the back electromotive force (BEMF) estimated value through traditional SMO, function frequency-variable tracker stator current (FVTSC) used instead switching function. By improving SMO method, BEMF independently, its precision maintained under startup or variable-speed states. In order to improve estimation accuracy resistance ability observer, rotor error was taken as disturbance term, third-order extended state (ESO) constructed estimate rotational mechanical motion equation. Finally, effectiveness method verified simulation experiment results. proposed strategy can effectively dynamic static performance PMSM.