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Waterway design of an external rotor permanent magnet synchronous generator

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Abstract

An external rotor permanent magnet synchronous generator (ERPMSG) model for Range-Extended Electric Vehicles is developed. The temperature field simulation model of the ERPMSG is established. Experimental test of the winding temperature shows that the simulation model is believable and then it is used to optimize the structural parameters of the cooling water channel. It is found that the pressure loss increases with the number of layers of the cooling water channel increasing and the width of the water channel decreasing. In order to obtain a large turbulent effect and a minimum pressure loss simultaneously, the number of layers of the cooling water channel is set to be 3 and the width of the waterway 8 mm. The corner of the water channel is designed round with an optimum radius of 20 mm. After optimization, the cooling performance of the ERPMSG is obviously improved. Compared with the ERPMSG before optimization, the temperature of the ERPMSG with optimum structure parameters of the cooling water channel is lower. The maximum temperatures of the winding, the stator core and the rotor of the ERPMSG with optimum structure parameters of the cooling water channel decrease 8.19 °C, 5 °C and 7.42 °C respectively. Temperature distribution is more uniform in the permanent magnet of the ERPMSM with waterway structure optimization.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51375176), Research and Development Program in Key Areas of Guangdong Province (No. 2019B090914001), Foshan science and technology innovation project (No. 2016AG101773).

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Authors and Affiliations

  1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640, China

    Zhenping Wan, Bo Sun, Wanyu Wen & Yong Tang

  2. Department of Applied Physics, School of Science, South China University of Technology, Guangzhou, 510640, China

    Xiaowu Wang

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  1. Zhenping Wan
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  2. Bo Sun
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  3. Xiaowu Wang
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  4. Wanyu Wen
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  5. Yong Tang
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Correspondence to Xiaowu Wang.

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Wan, Z., Sun, B., Wang, X. et al. Waterway design of an external rotor permanent magnet synchronous generator. Heat Mass Transfer 56, 1249–1261 (2020). https://doi.org/10.1007/s00231-019-02762-3

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