Field-circuit coupling simulation-analysis and optimization on bus bar of switching power supply

According to the working principle of switching power supply, an external circuit model of bus bar was built. The simulation of field-circuit coupling with the model of bus bar was carried out, and the current density distribution and ohmic loss distribution under the conditions of the bus bar in the actual excitation were obtained, using the finite-element simulation. The concentrated areas of ohmic loss of the bus bar was analyzed, and the structure of the bus bar was optimized on the basis of the analysis, and the current density and the ohmic losses were decreased.