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<p>Effective protection against the invasion of vacuum and high temperature in dual extreme environments is the foundation to ensure the reliable operation of permanent magnet synchronous&#xa0;motor (PMSM). This paper proposes a thermal defense device based on nanomaterials for PMSM, providing an innovative solution for thermal management of motors in extreme environments. Due to the complexity of the microstructure and scale effects of nanomaterials, they exhibit thermal conduction properties significantly different from conventional macroscopic materials. Based on interfacial thermal resistance between nanoparticles, quantum effects, and radiative coupling effects, this paper establishes a multi-scale thermal model. First, a phonon heat transport model within nanomaterials is developed using the lattice Boltzmann method (LBM), and the equivalent thermal conductivity between nanoparticles is derived. Subsequently, a nanoscale thermal radiation model between particles is established, and the equivalent emissivity of the nanoparticles is calculated. Simultaneously, a macroscopic scale thermal radiation model is constructed for the heat exchange between the outer aluminum foil surface of thermal defense device based on nanomaterials and the heat source, as well as between the inner aluminum foil surface and the PMSM outer surface. Additionally, a thermal conduction model is developed for heat transfer between different components of the PMSM, enabling coupling between the thermal radiation and thermal conduction models. By integrating both nanoscale and macroscale thermal radiation and conduction models, this work aims to precisely predict the temperature distributions and characteristics of various PMSM components within the thermal protection device. Finally, an experimental system for the thermal defense device based on nanomaterials is constructed. The thermal protection performance of the PMSM in terms of insulation and demagnetization resistance is tested, while the accuracy and validity of the multi-scale thermal analysis model developed in this paper are validated.</p>

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Research on the thermal protection capability of nano-thermal insulation materials for permanent magnet motors in high-temperature vacuum environments

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Hui An,
  • Ruilin Pei,
  • Wenyu Deng,
  • Ming Li,
  • Qiang Hou,
  • Yuejun An

摘要

Effective protection against the invasion of vacuum and high temperature in dual extreme environments is the foundation to ensure the reliable operation of permanent magnet synchronous motor (PMSM). This paper proposes a thermal defense device based on nanomaterials for PMSM, providing an innovative solution for thermal management of motors in extreme environments. Due to the complexity of the microstructure and scale effects of nanomaterials, they exhibit thermal conduction properties significantly different from conventional macroscopic materials. Based on interfacial thermal resistance between nanoparticles, quantum effects, and radiative coupling effects, this paper establishes a multi-scale thermal model. First, a phonon heat transport model within nanomaterials is developed using the lattice Boltzmann method (LBM), and the equivalent thermal conductivity between nanoparticles is derived. Subsequently, a nanoscale thermal radiation model between particles is established, and the equivalent emissivity of the nanoparticles is calculated. Simultaneously, a macroscopic scale thermal radiation model is constructed for the heat exchange between the outer aluminum foil surface of thermal defense device based on nanomaterials and the heat source, as well as between the inner aluminum foil surface and the PMSM outer surface. Additionally, a thermal conduction model is developed for heat transfer between different components of the PMSM, enabling coupling between the thermal radiation and thermal conduction models. By integrating both nanoscale and macroscale thermal radiation and conduction models, this work aims to precisely predict the temperature distributions and characteristics of various PMSM components within the thermal protection device. Finally, an experimental system for the thermal defense device based on nanomaterials is constructed. The thermal protection performance of the PMSM in terms of insulation and demagnetization resistance is tested, while the accuracy and validity of the multi-scale thermal analysis model developed in this paper are validated.