A-Permanent-magnet-Hybrid-In-wheel-Motor-Drive-for-Electric-Vehicles.pdf

IEEE Vehicle Power and Propulsion Conference (VPPC), September 3-5, 2008, Harbin, China A Permanent-magnet Hybrid In-wheel Motor Drive for Electric Vehicles 1 1 2 Chunhua Liu , K. T. Chau , Senior Member, IEEE, and J. Z. Jiang 1 Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China. Email: chualiu@eee.hku.hk and ktchau@eee.hku.hk 2 Department of Automation, Shanghai University, Shanghai, China. Email: jzhjiang@mail.shu.edu.cn Abstract—This paper proposes and implements a new outer- to analyze the steady-state and transient performances of rotor permanent-magnet (PM) hybrid in-wheel motor drive the proposed in-wheel motor drive. Also, a 36/24-pole 2- for electric vehicles. Since the proposed PM hybrid motor kW prototype will be constructed for verification, which is drive artfully integrates two excitations (PMs and DC field particularly suitable for a battery-powered electric windings) to produce magnetic field, it achieves the ability of motorcycle. a wide rang of flux control, which can offer a very high Section II will describe the in-wheel motor drive system starting torque for electric vehicles cranking and extend the and its configuration. In Section III, the proposed PMHB speed range with constant-power operation, as well as keep machine design and analysis will be introduced. Section high efficiency at a wide speed range. Moreover, its outer- IV will give the