混合电动车用的功率模块在使用新技术后的功率循环性能

本文给出了联合研究项目"用于主变速器的电气部件"的一些研究结果。电力电子的冷却是由发动机的冷却电路来实现的。发动机的温度可以达到105℃,在极端情况下,可以达到125℃。因此,功率器件必须经受高于200℃的温度。其面对的挑战是功率循环周期的能力。通过改进封装技术,可以实现该要求。本文进行了系统的功率循环测试,说明了不同的失效模式,并对改进的性能做了评价。结果表明:采用新技术,使得功率循环寿命因子提高到100。

Power Cycling Capability of New Technologies in Power Modules for Hybrid Electric Vehicles

Some findings of the joint research project-- ＂Electrical Components Used for the Main Transmission＂ ai＇e presented in the paper. Cooling of power electronics is realized through engine＇ s cooling circuit. The temperature of engine can be up to 105℃, in extreme cases, even up to 125℃. Thus, the power device must be able to withstand temperature over 200℃. Its challenge is the ability of power cycle. Such requirement＇can be achieved through the improvement of packaging technology. With systematic power cycling test, this paper introduces different failure modes and evaluates the improved performance. It is found that the new technology can increase power cycling life factor to 100.