基于多物理场耦合分析的压接型IGBT散热器多目标优化

Multi-objective Optimization of a Press Pack IGBT Heatsink Based on Multi-physical Field Coupling Simulation Analysis

为研究处于电磁场、温度场和应力场相互耦合的多物理场环境下的压接型IGBT水冷散热器热阻、流阻及表面压力分布特性,结合ANSYS软件,提出一种在电磁-热-应力多物理场耦合环境下水冷散热器多目标优化方法。在满足表面压力的前提下,以水冷散热器热阻、流阻最小化为优化目标。采用Kriging方法构建响应面模型,利用AMGA优化算法对水冷散热器内部流道结构进行多目标优化设计,计算出了最优方案。搭建试验平台对仿真分析结果进行试验验证,证明文中对压接型IGBT水冷散热器的多物理场耦合分析方法可以指导多物理场下的水冷散热器的设计。

In order to research the distribution characteristics of thermal resistance,flow resistance and surface pressure of a press pack IGBT water-cooled heatsink under the environment of multi-physical fields coupled with electromagnetic field,temperature field and stress field,a multiobjective optimization method for water-cooled heatsink under the electromagnetic-thermal-force multi-physical fields coupling environment was carried out by ANSYS software.On the premise of meeting the surface pressure,taking the minimization of the thermal resistance,flow resistance of the water-cooled heatsink as the optimization objective.Based on the Kriging method,the response surface model was constructed.Based on the AMGA optimization algorithm the multi-objective optimization about the water-cooled heatsink internal channel structure was carried out,and the optimal scheme was calculated.An experimental platform was built up to verify the simulation results,proving that the multi-physical fields coupling analysis method of press pack IGBT water-cooled heatsink can guide the design of water cooling radiator under multi-physical fields.