Affiliations: [a] Automotive Engineering Research Institute, Hefei University of Technology, Anhui, China | [b] Intelligent Manufacturing Institute, Hefei University of Technology, Anhui, China
Correspondence:
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Corresponding author: Jiujian Chang, Hefei University of Technology, Anhui, Hefei, 230088, China. E-mail: changjiujian@hfut.edu.cn
Abstract: This paper takes the demand of high power density motor for new energy vehicles as the application background. In order to solve the problem of low power density of radial flux motor, a novel direct cooling yokeless and segmented armature axial flux machine (YASA) is proposed. The thermal-fluid multi-physical coupling field of YASA motor has been studied by combining numerical analysis and computational fluid dynamics (CFD). On this basis, the internal relationship among the output power, flow resistance and structural parameters of the cooling system has been studied, and then the parameters of cooling system has been multi-objectives optimized. On the premise of meeting the pressure loss of the cooling system, the heat transfer efficiency has been improved, and then the output power of the motor has been increased.
Keywords: YASA, cooling system, power density, CFD, pressure loss
