Develop parasitic inductance model for the planar busbar of an IGBT H bridge in a power inverter

This paper first analyzes the current paths on a planar busbar based on IGBT bridge switching states and DC-link capacitor configurations. The busbar´s circuit models which include both self and mutual inductances are developed based on the identified current paths. The inductance circuit models are analyzed and reduced for different switching states, transition states and DC-link capacitor configurations. Inductance and current sharing are analyzed based on circuit theory. Both simulations and experiments are conducted to verify the developed technique.