Inductance Measurement Method of an IPMSM

매입형 영구자석 동기전동기의 인덕턴스 계측

An interior permanent magnet synchronous motor (IPMSM) is receiving increased attention for many industrial applications because of its high torque to inertia ratio, superior power density, and high efficiency. IPMSM is necessary to use the accurate information of the inductance for the precise torque control owing to the reluctance torque. This paper presents two method to measure the each-axis Inductance. The first method uses the peak current that is measured by applying the pulsewise voltage on the each position of IPMSM. The second uses the hysteresis loop of the flux and current measured by applying the positive and negative pulsewise voltage alternately on the each-axis.