Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Circuit Model Based Analysis of a Wireless Energy Transfer System via Coupled Magnetic Resonances
Authors Sang-Hoon Cheon ; 李Yong-Hae Kim ; Myung-Lae Lee ; 烈Seung-Youl Kang ;
DOI 10.6113/TKPE/2011.16.2.130
Page pp.130-136
ISSN 1229-2214
Keywords Electric Scooter; MRAS; Speed observer; In-wheel; PMSM
Abstract This paper presents the torque control algorithm of a permanent magnet synchronous motor(PMSM) for an electric scooter. The volume of the in-wheel type motor is restricted due to the complicated mechanical structure in wheel of an electric scooter, so the hall sensors instead of resolver and encoder for the rotor position sensors are installed. In this paper, the rotor speed and position are estimated from the speed estimator for vector control of a PMSM with hall sensors. The motor starts to rotate at standstill in BLDC mode with 120 degree conduction. After start up, the operating mode is changed to the vector control with maximum torque per ampere(MTPA) operation at low speeds and flux weakening control at high speeds. The performance of the proposed control algorithm is verified through the experiment in the electric scooter.