Work

Unbalanced magnetic force analysis and harmonic optimization of flux switching machine based on stator axial partition

Year: 2026

Type: article

Abstract: Flux switching permanent magnet (FSPM) machines with odd rotor teeth exhibits significant vibration caused by the unbalanced magnetic force (UMF). This paper proposes a stator axial partitioned FSPM (SAP-FSPM) machine, which can effectively eliminate the UMF, and introduces the UMF suppression principle for the first time. Moreover, the harmonic characteristics of the SAP-FSPM are utilized to achieve rapid optimization. Initially, the UMF suppression mechanism in SAP-FSPM is investigated using magnetic field modulation theory. Subsequently, by analyzing the harmonic components of air gap flux density, cogging torque, and back electromotive force (EMF) of both the SAP-FSPM machine and its two modular parts, we show that these harmonic components either cancel out or superimpose. Based on the above analysis, a method of harmonic optimization for one of the modular parts is proposed to optimize the SAP-FSPM, which transforms the 3D optimization problem into 2D, overcoming the time-consuming nature of traditional 3D optimization. The finite element (FE) simulation shows the effectiveness of the proposed optimization method. Finally, a prototype was fabricated for comparison and validation with the conventional FSPM machine.

Source: Mechatronics

Authors: Jiahao Li, Shiwei Zhao, Jianghua Cao, Xiangyu Yang, Zhongyi Li

Institution: South China University of Technology

Language: English

Topic: Electric Motor Design and Analysis

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,940

Funders: Key Technologies Research and Development Program, National Key Research and Development Program of China

Award: G999341744