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In the field of permanent magnet synchronous motors (PMSM) cooling, turbulent kinetic energy (TKE), and turbulent dissipation are used for the first time to numerically evaluate the heat transfer performance of axial water jackets, in order to investigate the influence of the water jackets structural parameters on the water-cooled system of high-power-density PMSM (HPD-PMSM). In the present work, the temperature distribution and fluid-flow pattern of a 40 kW HPD-PMSM were calculated using the finite element method, and temperature testing of the HPD-PMSM at different speeds using a built test platform. In addition, the effects of the bend shape of cooling channels (BSCC) on the axial water jackets performance for heat transfer are examined, and a detailed analysis of the mechanism underlying the development and evolution of high vorticity vortex is provided. The findings demonstrate that the TKE is attenuated by the positive vortex development, which is harmful to the TKE normal function in axial water jackets heat transfer. Furthermore, the maximum stator winding temperature was reduced to 93.49°C and the maximum flow velocity within the water jackets could be increased by 14.34% owing to the BSCC improvement.
PAPER REVISED: 2023-05-16
PAPER ACCEPTED: 2023-05-18
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THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 1, PAGES [465 - 477]
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© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence