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<p>To enhance the power density and heat dissipation efficiency of stator oil-immersed cooling high-speed permanent magnet generators (HSPMGs), the inside and outside parallel oil channels structure and the toroidal winding are studied using the lumped parameter thermal network (LPTN) method. First, based on the inside and outside parallel oil channels of the stator oil-immersed cooling system, an LPTN model of the HSPMG is established by combining the stator and oil channels submodules. On this basis, combined with the Computational Fluid Dynamics (CFD) method, the HSPMG temperature under different working conditions is compared and analyzed, and the heat characteristics of different working conditions are clarified. Secondly, by studying the HSPMG temperature and the flow rate of the cooling medium under different oil channel structural parameters, the effect of the oil channel structure on the thermal flow characteristics is elucidated. Finally, by analyzing the impact of coordinated changes in multiple oil channel structural parameters on the HSPMG temperature, the optimal oil channel configuration of the HSPMG is determined.</p>

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Investigation on Flow and Heat Characteristics of Oil-Immersed Cooling High-Speed Permanent Magnet Generator with Toroidal Windings Based on the LPTN Method

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • Jinyu Li,
  • Jianan Lu,
  • Cunxiang Yang,
  • Hongbo Qiu

摘要

To enhance the power density and heat dissipation efficiency of stator oil-immersed cooling high-speed permanent magnet generators (HSPMGs), the inside and outside parallel oil channels structure and the toroidal winding are studied using the lumped parameter thermal network (LPTN) method. First, based on the inside and outside parallel oil channels of the stator oil-immersed cooling system, an LPTN model of the HSPMG is established by combining the stator and oil channels submodules. On this basis, combined with the Computational Fluid Dynamics (CFD) method, the HSPMG temperature under different working conditions is compared and analyzed, and the heat characteristics of different working conditions are clarified. Secondly, by studying the HSPMG temperature and the flow rate of the cooling medium under different oil channel structural parameters, the effect of the oil channel structure on the thermal flow characteristics is elucidated. Finally, by analyzing the impact of coordinated changes in multiple oil channel structural parameters on the HSPMG temperature, the optimal oil channel configuration of the HSPMG is determined.