Water Jacket and Slot Optimization of a Water-Cooling Permanent Magnet Synchronous In-Wheel Motor

This article investigates the water jacket and slot optimization of a water-cooling permanent magnet synchronous in-wheel motor. The optimization consists of the improvements of the water jacket heat dissipation and slot heat dissipation. In order to reduce the temperature difference between the water and water jacket wall, the impact of the water jacket configuration parameters and shapes are theoretically studied. According to the researches, the method for the water jacket optimization is proposed. A slot thermal model is established to optimize the thermal behavior in slots. The variations of the thermal performances with impregnation materials and slot configuration parameters are analyzed. On the basis of the analysis, this article presents a method for the thermal optimization. The validity of the method is supported by the finite element analysis, computational fluid dynamics and experiments.