A Study on Analysis Method of Torque and Torque Ripple according to Load Angle for Permanent Magnet Motor

영구자석 전동기의 부하각에 따른 토크 및 토크리플 분석을 위한 해석법 연구

This paper presents an efficient calculation method for torque and torque ripple of a permanent magnet synchronous motor by using superposing method of load angle torque curves from finite element method. The load angle range having minimum torque ripple as well as average torque according to load angle can be induced by proposed method. We selected a permanent magnet assisted synchronous reluctance motor (PMa-SynRM) as a study model because of its high torque ripple. We performed experiment of torque ripple and average torque according to load angle for the verification of proposed method in the paper.