Stabilization of Position Sensor-less Control for Low-Inductance and High-Speed PMSM with Reduced Order Flux Observer

This paper presents position sensor-less control of low-inductance and high-speed permanent magnet synchronous motor (PMSM) drives. The proposed method estimates flux from a reduced order observer and estimates pole position with estimated flux. For low-inductance PMSM, current detection is difficult, because the current varies rapidly. Therefore, pole position estimation with the measured current is difficult. This paper proposes a sensor-less method with the reference current instead of the measured current.