Title: Less-rare-earth permanent magnet synchronous motor: a novel structure and its vibration analysis

Authors: Aiyu Gu; Mingjie Yang; Jianan Dong; Yongkang Ren

Addresses: Institute of Automation, Guangdong University of Technology, Guangzhou, Guangdong Province, China ' Institute of Automation, Guangdong University of Technology, Guangzhou, Guangdong Province, China ' Institute of Automation, Guangdong University of Technology, Guangzhou, Guangdong Province, China ' Institute of Automation, Guangdong University of Technology, Guangzhou, Guangdong Province, China

Abstract: Limited by the high price and scarcity of rare-earth materials, the less-rare-earth permanent magnet synchronous motor (LRE-PMSM) is emerging as a promising candidate. To solve the irreversible demagnetisation of non-rare-earth permanent magnets in LRE-PMSM, a novel reverse salient less-rare-earth permanent magnet synchronous motor (RS-LRE-PMSM) is proposed in this paper, which is obtained by changing the structure of the rotor based on a certain widely used electric vehicles (baseline motor). Firstly, the deduction process of the RS-LRE-PMSM and its electromagnetic performances are given. Then, the analytical method and finite element method (FEM) are used to find the electromagnetic force waves that have a great influence on the vibration and noise of both motors. The vibration performance of the baseline motor and the RS-LRE-PMSM is also investigated by the comparative study method, and then a method to improve the vibration performance of the RS-LRE-PMSM is used.

Keywords: less-rare-earth; permanent magnet synchronous motor; reverse salient; vibration and noise; resonance.

DOI: 10.1504/IJPELEC.2024.135702

International Journal of Power Electronics, 2024 Vol.19 No.1, pp.99 - 114

Received: 12 Aug 2022
Accepted: 01 Apr 2023
Published online: 23 Dec 2023 *