Study on busbar-structure for prototype of the high-speed railway traction converter

As modern power devices involve decreasing switching time and increasing current level, the stray inductance of the busbar connecting DC capacitors and power devices becomes one very important design of a high-power converter. This paper analyzes and designs a busbar structure in detail for prototype of the high-speed railway traction converter. The method of partial element equivalent circuit (PEEC) and the Q3D software were used to extract the stray inductance. A hollow-shape structure is presented with lower inductance than the initial U-shape structure. The simulation results are given to illustrate the effectiveness.