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Multi-objective optimization algorithm for optimizing NVH performance of electric vehicle permanent agnet synchronous motors

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Abstract

The NVH (noise, vibration, harshness) performance of a motor is one of the main problems affecting the comfort, safety, and reliability of electric vehicles. Electromagnetic force is the main cause of motor noise. Most of the existing research focuses on the overall noise level, and does not consider the impact of specific orders of electromagnetic force on noise, which results in a lack of applicability of noise reduction techniques. In this paper, a rotor with an auxiliary slot was used to weaken the electromagnetic force. A multi-objective optimization algorithm combining finite-element simulation with a response surface method was proposed. To determine the relationship between specific orders of electromagnetic force and the auxiliary slot parameters, simulation experiments were carried out with a large range and a large step size in finite-element analysis software. Then, the parameter range with a low value of electromagnetic force was selected. In this new range, the response surface method was used to establish the parameter and electromagnetic force expressions. Then, the linear weighting method in the multi-objective optimization algorithm was selected to determine the objective function of the multi-order electromagnetic force optimization. The weight of each order of electromagnetic force was set according to its contribution to the noise. Finally, the effectiveness of the proposed method was verified by simulations. Simulation results show that this method can quickly and effectively determine the optimal size of the auxiliary slot. In addition, the maximum value of the noise was reduced from 107.6 to 103.2 dB.

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Funding

Major research program integration project of National Natural Science Foundation of China, U2013601, Jianzhong Sun.

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Authors and Affiliations

  1. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, China

    Yidi Zhu, Fengxian Bai & Jianzhong Sun

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  1. Yidi Zhu
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  2. Fengxian Bai
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Correspondence to Yidi Zhu.

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Zhu, Y., Bai, F. & Sun, J. Multi-objective optimization algorithm for optimizing NVH performance of electric vehicle permanent agnet synchronous motors. J. Power Electron. 22, 2039–2047 (2022). https://doi.org/10.1007/s43236-022-00519-6

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  • DOI: https://doi.org/10.1007/s43236-022-00519-6

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