Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Restarting Method for EEMF Based Sensorless Permanent Magnet Synchronous Motor Drive Systems
Authors Young-Jae Lee ; Yeongsu Bak ; Kyo-Beum Lee
Page pp.127-133
ISSN 1229-2214
Keywords PMSM(Permanent Magnet Synchronous Motor) ; Restarting method ; Sensorless control ; Rotor speed estimation ; Rotor angle estimation
Abstract This paper proposes a restarting method for extended electromotive force (EEMF)-based sensorless permanent magnet synchronous motor (PMSM) drive systems. The sensorless PMSM drive systems generally estimate the rotor speed and angle based on EEMF. However, if the inverter is stopped while the PMSM is rotating, the initial rotor speed and angle are required for restart. Therefore, the proposed restarting method estimates the initial rotor speed and angle using the short-circuit current generated by applying zero voltage vector from the inverter. The validity of the proposed method is verified by simulation and experimental results.