Harnessing Rotating Heat Pipes for Passive Electric Motor Cooling: Enhancing Electric Vehicle Efficiency

Yasmine Karenita Siregar; Khairu Rezqi; Gerardo Janitra Puriadi Putra; Andhy M Fathoni; Nandy Putra; Hairul  Abral

doi:10.5614/j.eng.technol.sci.2028.58.1.7

Authors

Yasmine Karenita Siregar Applied Heat Transfer Research Group (AHTRG), Department of Mechanical Engineering, Universitas Indonesia, Jalan Prof. Dr. Sumitro Djojohadikusumo, Kampus UI, Depok 16424, Indonesia
Khairu Rezqi Applied Heat Transfer Research Group (AHTRG), Department of Mechanical Engineering, Universitas Indonesia, Jalan Prof. Dr. Sumitro Djojohadikusumo, Kampus UI, Depok 16424, Indonesia
Gerardo Janitra Puriadi Putra Applied Heat Transfer Research Group (AHTRG), Department of Mechanical Engineering, Universitas Indonesia, Jalan Prof. Dr. Sumitro Djojohadikusumo, Kampus UI, Depok 16424, Indonesia
Andhy M Fathoni Applied Heat Transfer Research Group (AHTRG), Department of Mechanical Engineering, Universitas Indonesia, Jalan Prof. Dr. Sumitro Djojohadikusumo, Kampus UI, Depok 16424, , Indonesia
Nandy Putra
nandyputra@eng.ui.ac.id
Applied Heat Transfer Research Group (AHTRG), Department of Mechanical Engineering, Universitas Indonesia, Jalan Prof. Dr. Sumitro Djojohadikusumo, Kampus UI, Depok 16424, , Indonesia https://orcid.org/0000-0003-3010-599X
Hairul Abral Laboratory of Nanoscience and Technology, Department of Mechanical Engineering Universitas Andalas Padang, Jalan Limau Manis, Padang 25163, Indonesia

Vol. 58 No. 1 (2026): Vol. 58 No. 1(2026): February

Articles

Accepted October 28, 2025

Published December 12, 2025

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Electric vehicles are equipped with electric motors that convert electrical energy into mechanical energy to propel the vehicle. The motor experiences an increase in temperature during operation due to various losses that cause the motor temperature to rise. The performance of the electric motor will be reduced or even damaged if the heat continues to increase and the temperature exceeds 60°C. Therefore, there is a need for a cooling system that can maintain the electric motor's temperature within its working range. This study aims to investigate and test the rotating heat pipe (RHP) as a passive cooling system for electric motors. The objective of this research is to examine the performance of the RHP. The study employs a RHP with installed thermocouples on its surface. Additionally, a slip ring is utilized to serve as interface between the data acquisition module and the thermocouple sensor. In this investigation, the Rotating Heat Pipe was equipped with two slip rings to measure temperature in rotary conditions. This study proves that using RHP can reduce thermal resistance by 30-66% compared to stationary heat pipes.

Siregar, Y. K., Rezqi, K., Putra, G. J. P., Fathoni, A. M., Putra, N., & Abral, H. . (2025). Harnessing Rotating Heat Pipes for Passive Electric Motor Cooling: Enhancing Electric Vehicle Efficiency. Journal of Engineering and Technological Sciences, 58(1), 86–100. https://doi.org/10.5614/j.eng.technol.sci.2028.58.1.7

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