Electromagnetic performance and thermal analysis of a novel permanent magnet fluxed-switching coupler

Article type: Research Article

Authors: Ye, Lezhi^a; | Zhang, Yulong^a | Cao, Mingguang^a

Affiliations: [a] Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China

Correspondence: [*] Corresponding author: Lezhi Ye, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China. E-mail: [email protected]

Abstract: To solve the problem of complex operating device and permanent magnets (PMs) demagnetization at high temperature, a new type of permanent magnet fluxed-switching coupler (PMC) with synchronous rotating adjuster is proposed. Its torque can be adjusted by rotating a switched flux angle between the adjuster and PMs along the circumferential direction. The structural feature and working principle of the PMC are introduced. The analytical model of the novel PMC was established. The torque curves are calculated in transient field by using the three-dimensional finite element method (3-D FEM). The temperature distribution of the novel PMC under rated condition is calculated by 3-D FEM, and the temperature distribution of the PM is compared with that of the conventional PMC. The simulation and test results show that the maximum temperature of copper disc and PM of the novel PMC are 100 °C and 48 °C respectively. The novel PMC can work stably for a long time under the maximum load condition.

Keywords: Permanent magnet coupler, switched flux, torque prediction, thermal analysis, transmission efficiency

DOI: 10.3233/JAE-210127

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 68, no. 1, pp. 123-140, 2022