As the core device of energy transformation and transmission,IGBT with excellent current carrying capacity and high voltage resistance has been widely used in rail transportation,power system and other industries.In order to improve the safety and stability of power device system,it is of great significance to obtain the actual operating status and performance of the surge voltage by modeling,simulation and deep investigation.In this paper,an accurate single leg circuit model is established with the finite element method to calculate the quasi-static electromagnetic field and extract the parasitic parameters of each circuit in the single leg circuit,fully considering the static and dynamic characteristics of IGBT and the influence of parasitic parameters of each circuit.By comparison modeling tests with different accuracy,it is demonstrated that the parasitic parameters have great influence on the amplitude and oscillation of surge voltage,which should be paid more attention in the circuit optimization design.The simulation model is accurate and adjustable,whose results have great reference value for the loss calculation,EMC design and risk assessment of IGBT power devices.
维普
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