Liquid Metal Magnetohydrodynamic Pump for Junction Temperature Control of Power Modules
Liquid Metal Magnetohydrodynamic Pump for Junction Temperature Control of Power Modules
复制标题
DOI：
10.1109/tpel.2018.2806622
复制
发表时间：
2018-02
影响因子：
6.7
通讯作者：
Y. Yerasimou;V. Pickert;B. Ji;Xueguan Song
中科院分区：
文献类型：
--
作者：
Y. Yerasimou;V. Pickert;B. Ji;Xueguan Song
电源模块是公共交通系统中使用的电源转换器中最常见的故障部件，从而导致高的不定期维护成本。在操作时，发生高结温摆动，这导致功率模块的结构内的高热机械应力，从而缩短模块的寿命。作为冷却介质的液态金属在功率半导体冷却领域迄今为止很少受到关注，尽管它能够去除高的热通量。本文首次展示了如何使用液态金属来积极减少结温摆动。磁流体动力学（MHD）泵已被设计用于此目的，允许对撞击模块基板的液体金属的流速进行主动控制。该泵已被3D打印，并直接连接到电源模块。实现了一个闭环温度控制系统，能够估计绝缘栅双极晶体管的结温，从而控制MHD功率。本文介绍的模拟和实验结果显示，在满负荷循环的温度摆动减少12 °C作为最高观察到的减少率。本文还详细介绍了磁流体泵和控制器的硬件设计。
Power modules are the most common components to fail in power converters that are employed in mass transportation systems, thus leading to high unscheduled maintenance cost. While operating, high junction temperature swings occur that result in high thermomechanical stress within the structure of the power module, reducing the lifetime of the module. Liquid metals as a cooling medium received so far little attention in the area of power semiconductor cooling, despite being able to remove high heat fluxes. This paper shows for the first time how liquid metal is used to reduce actively the junction temperature swing. A magnetohydrodynamic (MHD) pump has been designed for this purpose allowing active control of the flow rate of the liquid metal that impinges against the baseplate of the module. The pump has been 3-D printed and is attached directly to the power module. A closed-loop temperature control system is implemented, able to estimate the insulated-gate bipolar transistor's junction temperature, and thus, controls the MHD power. This paper presents simulation and experimental results showing reductions in the temperature swing over the full load cycle with 12 °C as the highest observed reduction rate. This paper also shows detailed designs of the MHD pump and the controller hardware.