Efficiency Evaluation on Cooling Behavior of Water-Cooling Jacket for Synchronous Reluctance Motor

Main Article Content

K.H. Nguyen
M. Masomtob
B. Kerdsup
S. Karukanan
P. Champa
T.D. Pham
S. Hirai
C.T. Vo
P. Kummool
C. Charoenphonphanich


This study presents the cooling efficiency after installing a water-cooling jacket for a 3-kW synchronous reluctance motor of an electric motorcycle and the factors influencing its thermal behavior by experimental and simulation approaches. The testing process was conducted as a method to collect input parameters and validate the results of the computing simulation. The simulation procedure used the step running technique to evaluate two different water-path models. The findings indicated that the maximum temperature of the stator winding and jacket cover decreased by 19.12 °C and 16.07 °C, respectively, following the installation of the water jacket and operation at a low flow rate with a current supply of 200 A. Furthermore, increasing the water flow rate leads to a substantial decrease in maximum temperature before a certain flow rate; 2 liters per minute (LPM) was chosen as the optimal rate. Temperature fluctuations exhibit an upward trend up to 1.85 °C with the higher supplied currents but drop with a higher flow rate. In addition, the motor maximum temperature in the long water-path jacket (LWJ) model was lower than in the short water-path jacket (SWJ) model due to the higher heat transfer coefficient (HTC).

Article Details

How to Cite
Nguyen, K., Masomtob, M., Kerdsup, B., Karukanan, S., Champa, P., Pham, T. ., Hirai, S., Vo, C., P. Kummool, & Charoenphonphanich, C. (2024). Efficiency Evaluation on Cooling Behavior of Water-Cooling Jacket for Synchronous Reluctance Motor. Journal of Research and Applications in Mechanical Engineering, 12(1), JRAME–24. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/253967


La Rocca A, La Rocca S, Zou T, Liu C, Moslemin M, Gerada C, et al. Performance assessment of standard cooling strategies for hairpin windings. 2022 International Conference on Electrical Machines (ICEM); 2022 Sep 5-8; Valencia, Spain. USA: IEEE; 2022. p. 1163-1169.

Cavazzuti M, Gaspari G, Pasquale S, Stalio E. Thermal management of a formula E electric motor: analysis and optimization. Appl Therm Eng. 2019;157:113733.

Liang P, Chai F, Shen K, Liu W. Thermal design and optimization of a water-cooling permanent magnet synchronous in-wheel motor. The 22nd International Conference on Electrical Machines and Systems (ICEMS); 2019 Aug 11-14; Harbin, China. USa: IEEE; 2019. p. 1-6.

Raj EFI, Appadurai M, Darwin S, Thanu MC. Detailed study of efficient water jacket cooling system for induction motor drive used in electric vehicle. Int J Interact Des Manuf. 2023;17:1277-1288.

Wang X, Li B, Gerada D, Huang K, Stone I, Worrall S, et al. A critical review on thermal management technologies for motors in electric cars. Appl Therm Eng. 2022;201:117758.

Kim C, Lee KS, Yook SJ. Effect of air-gap fans on cooling of windings in a large-capacity, high-speed induction motor. Appl Therm Eng. 2016;100:658-667.

Prieto B, Satrústegui M, Elósegui I, Gil-Negrete N. Multidisciplinary analysis of a 750 kW PMSM for marine propulsion including shock loading response. IET Electr Power Appl. 2020;14(10):1974-1983.

Marcolini F, De Donato G, Capponi FG, Caricchi F. Direct oil cooling of end-windings in torus-type axial-flux permanent-magnet machines. IEEE Trans Ind Appl. 2021;57(3):2378-2386.

Gundabattini E, Mystkowski A, Raja Singh R, Gnanaraj SD. Water cooling, PSG, PCM, Cryogenic cooling strategies and thermal analysis (experimental and analytical) of a Permanent Magnet Synchronous Motor: a review. Sadhana. 2021;46(3):124.

Wu PS, Hsieh MF, Cai WL, Liu JH, Huang YT, Caceres JF, et al. Heat transfer and thermal management of interior permanent magnet synchronous electric motor. Inventions. 2019;4(4):69.

Chen W, Ju Y, Yan D, Guo L, Geng Q, Shi T. Design and optimization of dual-cycled cooling structure for fully-enclosed permanent magnet motor. Appl Therm Eng. 2019;152:338-349.

Chuan H, Burke R, Wu Z. A comparative study on different cooling topologies for axial flux permanent magnet machine. 2019 IEEE Vehicle Power and Propulsion Conference (VPPC); 2019 Oct 14-17; Hanoi, Vietnam. USA: IEEE; 2019. p. 1-6.

Yang X, Fatemi A, Nehl T, Hao L, Zeng W, Parrish S. Comparative study of three stator cooling jackets for electric machine of mild hybrid vehicle. 2019 IEEE International Electric Machines and Drives Conference (IEMDC); 2019 May 12-15; San Diego, USA. USA: IEEE; 2019. p. 1202-1209.

Nategh S, Wallmark O, Leksell M. Thermal analysis of permanent-magnet synchronous reluctance machines. Proceedings of the 2011 14th European Conference on Power Electronics and Applications; 2011 Aug 30 - 2011 Sep 1; Birmingham, United Kingdom. USA: IEEE; 2011. p. 1-10.

Herrera DB, Galvan E, Carrasco JM. Synchronous reluctance motor design based EV powertrain with inverter integrated with redundant topology. IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society; 2015 Nov 9-12; Yokohama, Japan. USA: IEEE; 2015. p. 003851-003856.

Kerdsup B, Karukanan S. Design of motor characteristic testbed for permanent-magnet assisted synchronous reluctance motor. 2022 25th International Conference on Electrical Machines and Systems (ICEMS); 2022 Nov 29 - 2022 Dec 02; Chiang Mai, Thailand. USA: IEEE; 2022. p. 1-4.

Liang P, Chai F, Shen K, Liu W. Water jacket and slot optimization of a water-cooling permanent magnet synchronous in-wheel motor. IEEE Trans Ind Appl. 2021;57(3):2431-2439.

Wan Y, Li Q, Guo J, Cui S. Thermal analysis of a Gramme-ring-winding high-speed permanent-magnet motor for pulsed alternator using CFD. IET Electr Power Appl. 2020;14(11):2202-2211.

Wang H, Tao T, Xu J, Mei X, Liu X, Gou P. Cooling capacity of a novel modular liquid-cooled battery thermal management system for cylindrical lithium ion batteries. Appl Therm Eng. 2020;178:115591.

Hirasawa S, Kawanami T, Shirai K. Efficient cooling system using electrocaloric effect. J Electron Cool Therm Control. 2016;6(2):78-87.

Braslavsky IY, Metelkov VP, Esaulkova DV, Kostylev AV. Simplified method of taking into account temperature fluctuations influence on durability of induction motors stator winding insulation. 2018 17th International Ural Conference on AC Electric Drives (ACED); 2018 Mar 26-30; Ekaterinburg, Russia. USA: IEEE; 2018. p. 1-4.

Silwal B, Mohamed AH, Nonneman J, De Paepe M, Sergeant P. Assessment of different cooling techniques for reduced mechanical stress in the windings of electrical machines. Energies. 2019;12(10):1967.