In high power converter design, low-inductance busbar connecting DC capacitors and power devices is the
main concern to improve the quality of the whole power electronics system. This paper analyzes the impact of layernumber
on the stray inductance of busbar taking a subway traction converter as example. The method of partial element
equivalent circuit and the Q3D software are used to extract the stray inductance. The simulation and experimental results
show that the stray inductance of three-layer busbar is lower than two-layer busbar with other same conditions.