Title: Analysis and optimisation of a new Septal coil in-wheel switched reluctance motor

Authors: Dongyu Yang; Zhenjie Zhang; Yanyan Ding

Addresses: Department of Mechanical Engineering, Harbin University of Science and Technology, Rongcheng, 264300, China ' Department of Mechanical Engineering, Harbin University of Science and Technology, Rongcheng, 264300, China ' Department of Mechanical Engineering, Harbin University of Science and Technology, Rongcheng, 264300, China

Abstract: To enhance the average torque and torque density of in-wheel switched reluctance motors (IWSRM) for electric vehicles, a novel four-phase 16/18 IWSRM with the segmented coil is proposed. The basic structure and electromagnetic characteristics of the new IWSRM are analysed. Based on finite element analysis, the magnetic flux linkage, magnetic co-energy, inductance, and torque characteristics are studied and compared with the typical four-phase 16/18 IWSRM and 16/20 IWSRM with traditional winding structure. The results show the new IWSRM has higher average torque under medium/low current conditions. A multi-objective optimisation function based on average torque and torque density is established. The stator pole arc and rotor pole arc are selected for optimising the new IWSRM. The results without and with optimisation indicate the average torque and torque density of the motor can respectively be improved by 21.6% and 16.7% under a current of 100 A.

Keywords: IWSRM; in-wheel switched reluctance motor; Septal coil; finite element analysis; multi-objective optimisation.

DOI: 10.1504/IJVD.2025.148153

International Journal of Vehicle Design, 2025 Vol.97 No.2/3/4, pp.296 - 313

Received: 29 Jul 2024
Accepted: 10 Jan 2025
Published online: 27 Aug 2025 *

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