大功率逆变器散热设计

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摘要本文研究了大功率逆变器中IGBT模块的散热设计。大功率IGBT模块在功率变换系统、无功补偿系统等领域有着广泛的应用,随着系统尺寸重量向着轻小化方向发展,IGBT模块单位体积内的散热量越来越高,严重危害了系统的稳定运行,因而对IGBT模块的热分析、热管理成为大容量IGBT技术发展的重要研究方向。本文提供了一整套的散热设计方法：首先对IGBT模块在实际工作电压电流下的损耗进行了分析计算,接下来提出了一种考虑IGBT模块内NTC热敏电阻的新型等效热路图,通过该等效热路图可较快速准确地进行结温以及热阻的计算,最后利用ANSYS的DesignXplorer模块对影响散热器热阻的关键参数进行了定量分析,并对散热系统的散热效果进行了仿真和试验分析,证明散热设计的准确性。

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	赵红璐
	朱永元
	张银

关键词 ：逆变器, IGBT模块, 散热设计, 等效热路图

Abstract：This paper focuses on the thermal design of High-power inverter. IGBT modules have been widely used in power systems, as well as in reactive power compensation systems. With the trend of smaller size and lighter weight of the system, the heat dissipation within unit volume is consequently becoming higher, endangering the operation of the system. This paper provides a full set of thermal design: first, the loss of IGBT module in real working condition is analyzed; Then, a new type of thermal impedance network of NTC thermistor is put forward, with the help of the circuit, the junction temperature and thermal resistance could be calculated more quickly and accurately; finally, we use the DesignXplorer module of ANSYS to analyze the key parameters that influence the thermal resistance quantitatively. The cooling effect of the cooling system has been simulated and experimented to prove the accuracy of the thermal design.

Key words： inverter IGBT module thermal design thermal impedance network

收稿日期: 2018-01-25 出版日期: 2018-08-31

作者简介: 赵红璐（1994-）,女,中国矿业大学硕士研究生,研究方向为大功率电力电子器件散热设计。

引用本文:

赵红璐, 朱永元, 张银. 大功率逆变器散热设计[J]. 电气技术, 2018, 19(8): 149-156. Zhao Honglu, Zhu Yongyuan, Zhang Yin. Thermal design of high-power inverter. Electrical Engineering, 2018, 19(8): 149-156.

链接本文:

http://dqjs.cesmedia.cn/CN/Y2018/V19/I8/149

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