Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Journal of Engineering and Technological Sciences Prosiding SNTTM
Rezqi, Khairu
Unknown Affiliation
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Harnessing Rotating Heat Pipes for Passive Electric Motor Cooling: Enhancing Electric Vehicle Efficiency Siregar, Yasmine Karenita; Rezqi, Khairu; Putra, Gerardo Janitra Puriadi; Fathoni, Andhy M; Putra, Nandy; Abral, Hairul
Journal of Engineering and Technological Sciences Vol. 58 No. 1 (2026): Vol. 58 No. 1(2026): February
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2028.58.1.7

Abstract

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.
Thermal performance enhancement in electric motor rotors: Evaluating the impact of rotating heat pipes Rezqi, Khairu; Putra, Nandy; Sholahudin, Sholahudin; Kiswanto, Gandjar
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/hdn06j82

Abstract

Effective thermal management is essential in high-performance electric motors, where rotor overheating accelerates demagnetization and reduces operational lifespan. This study investigates a horizontally mounted, wick based rotating heat pipe (RHP) as a passive cooling solution for an induction motor rotor. The system was subjected to stepped heat loads 20, 25, 30, and 35 W, also and speeds 0, 250, 500, 750 RPM, with time resolved measurements acquired to evaluate steady state thermal resistance (Rth) and transient response. The results reveal a non monotonic relationship between rotational speed and thermal performance. Contrary to initial assumptions, the RHP achieved its lowest Rth of 0.164 °C/W not at standstill, but at a moderate speed of 250 RPM. This performance peak is attributed to a balanced interplay where gentle centrifugal force enhances capillary-driven liquid distribution, maximizing effective evaporation without inducing flow instability. Compared to the solid rotor baseline, the RHP consistently reduced rotor temperatures by up to 6 °C and lowered thermal resistance by more than 70%. Additionally, the RHP halved the thermal time constant following each power step, indicating superior transient regulation. The identification of an optimal rotational speed window, distinct from any transitional instability zone, offers critical design insight for embedding RHPs in next-generation electric machines where spatial constraints and thermal reliability are paramount.
Co-Authors Abral, Hairul Fathoni, Andhy M Nandy Putra Putra, Gerardo Janitra Puriadi Sholahudin, Sholahudin Siregar, Yasmine Karenita