基于有限元方法的逆变器层叠母排优化设计

Optimal design of inverter laminated busbar based on finite element method

以逆变器功率模块中的层叠母排为研究对象,论述了层叠母排杂感计算分析的本质;分析了在工业运用中提取母排杂散电感的各种方法的优劣;运用有限元方法分析了层叠母排杂散电感分布对尖峰电压的影响;运用有限元分析法对该层叠母排的杂散电感进行仿真,并依据杂散电感数值,对层叠母排进行优化设计。最终通过斩波试验验证结构优化的有效性,提出了降低母排杂感设计原则。

Taking the laminated busbar in the inverter power module as the research object,the essence of the calculation and analysis of the stray inductance of the laminated busbar is discussed;the merits and demerits of various methods for extracting the busbar stray inductance in industrial applications are analyzed;the influence of the stray inductance distribution of the laminated busbar on the peak voltage is analyzed;the stray inductance of the laminated busbar is simulated by the finite element analysis method,and the laminated busbar is designed optimally based on the stray inductance value.Finally,the effectiveness of the structural optimization design is verified by chopper experiments,and the design principle of reducing busbar stray inductance is proposed.