Numerical simulation of 3D stray field and short circuit impedance for a phase-shifting rectifier transformer

The simplified 3D FEM model coupling with the equivalent electric-circuit (EEC) is well established for a phase-shifting rectifier transformer (PSRT). The 3D stray fields, the parallel branch currents and the short-circuit impedances are calculated by the field-circuit coupling method(FCCM). The validity of the proposed analysis method is verified based on real product, which proved to be more efficient for the design of the PSRT.