Review and Prospect of Low-Speed High-Torque Permanent Magnet Machines
Bao Xiaohua1, Liu Jiwei1, Sun Yue2, Wu Changjiang1
1. School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China; 2. Anhui Wannan Electric Machine Co. Ltd Xuancheng 242500 China
Abstract Compared with the traditional induction motor with mechanical deceleration, low-speed high-torque permanent magnet direct drive machine has distinct advantages, which has drawn more and more attention. Torque density is one of the key indicators to measure low-speed high-torque permanent magnet direct drive machine. In this paper, from the aspects of structure characteristics, application status and scientific research progress, several kinds of low-speed high-torque permanent magnet direct drive machine are introduced, such as proper fraction-slot concentrated winding PM machine, PM vernier machine, PM disc machine, transverse-flux machine and dual-stator/ dual-rotor machine. The necessity and methods of torque ripple, air-gap eccentricity, mechanical strength and temperature field are summarized. Based on the research status, the future development direction is prospected, which provides a reference for the realization of low-speed high-torque permanent magnet direct drive machine.
Bao Xiaohua,Liu Jiwei,Sun Yue等. Review and Prospect of Low-Speed High-Torque Permanent Magnet Machines[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1148-1160.
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2019, Vol. 34 
