Design of a Magnetic-Geared Outer-Rotor Permanent-Magnet Brushless Motor for Electric Vehicles

• Published in: IEEE transactions on magnetics Vol. 43; no. 6; pp. 2504 - 2506
• Main Authors: Chau, K.T., Dong Zhang, Jiang, J.Z., Chunhua Liu, Yuejin Zhang
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-06-2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Brushless DC motors; Brushless motors; Cross-disciplinary physics: materials science; rheology; DC motors; Electric vehicle; Electric vehicles; Exact sciences and technology; Gears; Magnetic flux; magnetic gear; Magnetism; Magnetosphere; Materials science; Other topics in materials science; outer rotor; Permanent magnet motors; permanent-magnet motor; Physics; Rotors; Topology; Design; permanent-magnet motor; Gears; Rotors; Permanent magnets; Magnetic materials; Electric vehicle; outer rotor; Electric-powered vehicles; Engines; magnetic gear; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2007.893714

This paper proposes a novel in-wheel motor, which artfully integrates a magnetic gear into a permanent-magnet brushless (PMBL) DC motor so that they can share a common PM rotor, hence offering both high efficiency and high power density. Moreover, the low-speed requirement for direct driving and the high-speed requirement for compact motor design can be achieved simultaneously. A 2-kW 600/4400-rpm magnetic-geared outer-rotor PMBL DC motor is designed and analyzed, which is particularly suitable for battery-powered electric motorcycles