Surge Simulation in Pulse Transformer Model by Numerical Electromagnetic Field Computation

Abstract

In this paper we present transient analysis of transformer models by the moment method in frequency domain. The results show that the secondary voltage has the peak which is higher than the voltage calculated by the primary voltage and the winding ratio. The inductance of the winding and the capacitance between windings have an influence on a surge in the transformer winding. In addition to the transient analysis we calculate the inductance from time responses and the impedance in low frequency, and compare them with the analytical equation which is based on Nagaoka factor.