电动汽车变流器用igbt水冷散热器热仿真分析-中南大学学报.pdf

第 48 卷第 2 期 中南大学学报( 自然科学版) Vol.48 No.2 2017 年 2 月 Journal of Central South University (Science and Technology) Feb. 2017 DOI: 10.11817/j.issn.1672−7207.2017.02.033 电动汽车变流器用IGBT 水冷散热器热仿真分析 丁杰1, 2，张平1 (1. 湘潭大学 土木工程与力学学院，湖南 湘潭，411105； 2. 南车株洲电力机车研究所有限公司 南车电气技术与材料工程研究院，湖南 株洲，412001) 摘要：以某电动汽车变流器用IGBT 水冷散热器为研究对象，考虑到 IGBT 水冷散热器内部各槽道平均雷诺数(Re) 处于过渡区，利用 FLUENT 软件分别采用层流、标准 k−ε湍流模型和 6 种低 Re 数湍流模型计算 IGBT 水冷散热 器的稳态结果。运用自主开发的模型降阶计算程序对 IGBT 水冷散热器进行瞬态问题快速计算，在验证模型降阶 方法准确性的基础上，对基于中国典型城市道路工况的瞬态热仿真进行快速计算，得到 IGBT 元件各芯片在不同 时刻的温度变化曲线。研究结果表明：该水冷散热器的散热性能满足中国典型城市道路工况的需求。 关键词：电动汽车；变流器；IGBT ；水冷散热器；模型降阶；瞬态计算 中图分类号：U464.138 文献标志码：A 文章编号：1672−7207(2017)02−0525−08 Thermal analysis of IGBT water-cooling radiator for electric vehicle converter DING Jie1, 2, ZHANG Ping1 (1. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China; 2. CSR Research of Electrical Technology Material Engineering, CSR Zhuzhou Institute Co. Ltd., Zhuzhou 412001, China) Abstract: An IGBT water cooling radiator used in an electric vehicle converter was studied. Considering that the average Reynolds number of each channel was in the transition region, steady state temperature of the radiator was calculated by using the laminar model, the standard k-ε turbulence model and six kinds of different low Reynolds number turbulence models with FLUENT software, respectively. Transient problem of the radiator was calculated by using self-developed model order reduction calculation program. Through verifying the accu