Study on reducing cogging torque and core loss of in-wheel motor for electric vehicle based on stator full-slot offset Online publication date: Fri, 03-Feb-2023
by Qiping Chen; Xuanjun Huang; Hao Shao; Hui Chen; Chagen Luo
International Journal of Vehicle Design (IJVD), Vol. 89, No. 3/4, 2022
Abstract: In order to reduce cogging torque and core loss of in-wheel motor for electric vehicle, the paper proposes a full-slot offset method to analyse the above problems. Firstly, the calculation formulas of cogging torque and the core loss are deduced. Secondly, the models with different offset angles are imported into the finite element simulation model, the cogging torque and core loss are calculated respectively, and the correctness of the model is verified. The study results show that the full-slot offset angle is 3 degrees, the reduction of cogging torque and core loss is about 98% and 8% respectively, and the reduction of the first harmonic is about 96%. Therefore, the full-slot offset method can obviously restrain the cogging torque, core loss and the first harmonic, and provide a certain reference value for the optimisation design of cogging torque and core loss of in-wheel motor for electric vehicle.
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