中文摘要：

以绝缘栅双极型晶体管（insulated gate bipolar transistor,IGBT）可靠性寿命预测研究为背景,该文针对IGBT模块的功率循环提出了一种考虑实时结温反馈的散热器优化设计的数值算法。通过建立功率循环综合热网络模型,将每个功率循环周期等效为全响应和零输入响应,分析结温与热网络参数的数值计算关系,建立实时结温反馈数值算法得到功率循环曲线,从而寻找到功率循环与散热器动态热响应特性的关系,并提出优化方法。最后,以功率循环老化系统的设计为例,优化了老化系统所用散热器,通过实验测试对文中提出的数值仿真模型的有效性和精度进行了验证。

英文摘要：

On the background of insulated gate bipolar transistor（IGBT） reliability and life prediction research, an optimal design method of heat sinks based on the numerical algorithm which considers IGBT real-time junction temperature feedback in power cycling is proposed. Based on the thermal network of power cycling, each power cycle is equivalent to a complete response and a zero-input response. Then the numerical algorithm considering real-time junction temperature feedback is used to calculate the curves of the power cycle. And to derive an optimization method, the numerical function between junction temperature and dynamic response performances of heat sinks is also analyzed. Through experiments, the validity and precision of the numerical simulation model are testified. And based on this method, a heat sink for power cycling aging system is optimally designed.