Laminated busbar is used as the main connecting component in large-capacity power electronic devices

which can effectively reduce the stray inductance of the current commutation loop. However

multilayer busbars used in complex multilevel converters demonstrate distinctive features compared with the double layer counterparts. The middle conductor in current commutation loop will influence the stray inductance especially under high excitation frequency. In order to precisely express the characteristics of the multilayer laminated busbar

we performed modeling process and analysis. The effect of eddy current is taken into account in the proposed method

which guarantee the accuracy of calculation. Based on the electromagnetic field analysis

the frequency characteristics of stray inductance are investigated.Finally

the analysis result is proved by three-dimensional finite element analysis（FEA） simulations.