Jeong Min Kim, "매입형 영구자석 동기전동기 센서리스 구동 방식의 성능 비교," 아주대학교 공학석사 학위 논문, 2020. > Paper

This paper compares and analyzes the estimation performance for IPMSM (Interior Permanent Magnet Synchronous Motor) by

sensorless control methods. In general, the sensorless drive system of IPMSM estimates the speed and phase angle of the rotor

using different methods depending on the rotational speed. There are two methods, one is injecting high frequency voltage and the

other is extended electromotive force (EEMF) based sensorless control method. In the stationary and low speed regions of the 

IPMSM, a sensorless control method using high frequency voltage injection is used. And in the high speed region, EEMF based

sensorless control method is used. In this paper, compares and analyzes the rotor speed and phase angle estimation performance

of each sensorless control method according to the rotational speed of IPMEM through simulations performed under the same

conditions.