Effects of Axial Gap Length Between Disc Windings on Magnetic Fields and Power Losses of Evaporative Cooling Traction Transformers

摘要

The rapid development of electric multiple units (EMUs) requires the high efficiency and high-power density traction systems. For this demand, a practical solution is upgrading the heat dissipation capacity of the conventional line frequency transformer (LFT) by introducing the evaporative cooling technology. To apply this innovative technology in the prototype of evaporative cooling traction transformer, the disc windings are introduced. In this paper, the Field-Circuit Coupling method was selected to simulate the magnetic fields and the power losses of the prototype for evaluating its performance. And the effects of axial gap length between adjacent disc coils on the magnetic fields and the power losses were analyzed for further optimization of the evaporative cooling traction transformer.