Review and Prospect of Low-Speed High-Torque Permanent Magnet Machines

作者：Bao, Xiaohua^*; Liu, Jiwei; Sun, Yue; Wu, Changjiang

来源：Transactions of China Electrotechnical Society, 2019, 34(6): 1148-1160.

DOI：10.19595/j.cnki.1000-6753.tces.171743

• Development directions
• Dual-stator
• Fractional slot concentrated windings
• High torque
• Permanent-magnet machine
• Structure characteristic
• Torque density
• Transverse flux machines

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.

• 出版日期2019
• 单位合肥工业大学