应用CFD流固耦合热分析车用高功率密度电机的水冷系统

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Abstract The focus of the paper consist in the design and analysis of the water cooling system applied in HEVs high power density motor.To make sure of the heating transfer of high-power-density motor,it's the key to choose the suitable cooling structure.The paper uses computational fluid dynamics (CFD) and the coupling of solid and liquid thermal analysis to analyze three cooling methods,i.e.axial,radial,and spiral channels.The aim of the paper is to find the optimal cooling structure through the comparison of the velocity distribution,heating transfer,the consumption of water pump,the temperature distribution,and the processing technic.Finally,the spiral channel is adopted for high power density motor as the frame cooling structure.Thus,the design target of 10.0 A/mm² is achieved with optimized magnetic circuit and special material.With the same temperature rise,the current density of the proposed high-power density motor is about 2 times higher than that (5.0 A/mm²) in normal motor.At last,the testing of temperature by the infrared equipment is done to verify the results by CFD and hot spot of thermal field in FEA.

Key words： CFD water cooling system thermal analysis high power density current density

Received: 01 December 2014 Published: 22 May 2015

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TM315

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	Wang Xiaoyuan
	Du Jingjuan

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Wang Xiaoyuan,Du Jingjuan. Design and Analysis of Water Cooling System for HEVs High-Power-Density Motor Using CFD and Thermal Technology[J]. Transactions of China Electrotechnical Society, 2015, 30(9): 30-38.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I9/30

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