| Abstract |
In this paper we present a SPICE2 high frequency transformer model, which can be used for the analysis and the design of dc-to-dc converters. For the evaluation of the transistor switching losses and the dimensioning of the
converter components, a model of high precision is required. Furthermore, due to the transformer leakage inductance and parasitic capacitances, voltage spikes can occur across the semiconductors and noise voltages appear in the output. The general purpose circuit simulation package SPICE2 can be used as a tool to analyse dc-dc converters. Neverthenless, the built-in transformer model is inaccurate and when we use it, iteration procedure fails to converge to a solution. Therefore, the study of a more accurate model is needed. A SPICE2 model for soft-recovery power diodes is also presented. These SPICE2 models are compared with previously published experimental results, on a flyback converter and on a forward one with power MOSFETs transistors. |
