Magnetic-Field Analysis on Winding Disposition of Transformer for Distributed High-Speed Train Applications

In a high-speed train application, the modularized traction converter produces the significant harmonic currents caused from the switching behavior of a power converter. These harmonic currents bring the interference among the traction equipment. One way to minimize the interference is to design the secondary windings of a power transformer decoupled magnetically as possible. This paper presents a magnetic-field analysis on a winding disposition to clarify an impact on magnetic decoupling between secondary windings, under a limited height of a train. Two winding dispositions for a single-phase shell-type transformer are constructed and simulated by a three-dimensional finite-elements method (FEM) model. The simulation results with two different winding dispositions are provided and the experiments show good agreement with the simulation results.