Study on Hollow Shaft Using Thermal Analysis to Improve Cooling of Asynchronous Motors

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@article{1709671,
      author = {Onyeji levi Chinaka, Vincent Chukwuemeka Ezechukwu, Kennedy Chinedu Owuama, Nnam Ikechukwu Onwuka},
      title = {Study on Hollow Shaft Using Thermal Analysis to Improve Cooling of Asynchronous Motors},
      journal = {Iconic Research And Engineering Journals},
      year = {2025},
      volume = {9},
      number = {1},
      pages = {641-653},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1709671.pdf},
      abstract = {This study presents a thermal analysis-based investigation into the use of a hollow shaft with integrated forced liquid convection as a heat recovery and rotor cooling enhancement mechanism in asynchronous motors. The research focuses on designing a hollow shaft system capable of maintaining key component temperatures below an average of 100??C across different motor power operating conditions. Three steady-state configurations of the hollow shaft were examined for their thermal efficiency and temperature distribution: A basic counter-flow channel, Counter-flow design with internal fins, and a Duct-based configuration. Among these, the duct-based design exhibited the most effective thermal performance while also offering manufacturing simplicity, making it a viable option for large-scale applications. This configuration recorded a 303% increase in the heat transfer coefficient compared to the standard counter-flow setup. Further thermal evaluation of the duct design under four distinct motor operation scenarios, continuous and peak load conditions at both rated and maximum speeds revealed that the system maintained average shaft surface temperatures below the boiling point of water in three of the four cases. The findings support the potential of thermally optimized hollow shaft designs in improving cooling efficiency and operational reliability in induction motors.},
      keywords = {Thermal, Analysis, Based Design, Hollow Shaft, Induction},
      month = {July},
  }