Thermal Model Approach to the YASA Machine for In-Wheel Traction Applications

Guangchen Wang, Yingjie Wang, Yuan Gao, Wei Hua, Qinan Ni and Hengliang Zhang
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Guangchen Wang: Taizhou Liangsu Technology Co., Ltd., Taizhou 318016, China
Yingjie Wang: Tangshan Power Supply Company, State Grid Jibei Power Co., Ltd., Tangshan 063000, China
Yuan Gao: Department of Aerospace Engineering, Faculty of Engineering, University of Bristol, Queens Road, Bristol BS8 1QU, UK
Wei Hua: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Qinan Ni: Jiangsu Yueda Group, Yancheng 224007, China
Hengliang Zhang: School of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2022, vol. 15, issue 15, 1-18

Abstract: The axial-flux permanent magnet (AFPM) machines with yokeless and segmented armature (YASA) topology are suitable for in-wheel traction systems due to the high power density and efficiency. To guarantee the reliable operation of the YASA machines, an accurate thermal analysis should be undertaken in detail during the electrical machine design phase. The technical contribution of this paper is to establish a detailed thermal analysis model of the YASA machine by the lumped parameter thermal network (LPTN) method. Compared with the computational fluid dynamics (CFD) method and the finite element (FE) method, the LPTN method can obtain an accurate temperature distribution with low time consumption. Firstly, the LPTN model of each component of the YASA machine is constructed with technical details. Secondly, the losses of the YASA machine are obtained by the electromagnetic FE analysis. Then, the temperature distribution of the machine can be calculated by the LPTN model and loss information. Finally, a prototype of the YASA machine is manufactured and its temperature distribution under different operating conditions is tested by TT-K-30 thermocouple temperature sensors. The experimental data matches the LPTN results well.

Keywords: lumped parameter thermal network (LPTN); losses; temperature distribution; yokeless and segmented armature (YASA) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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