Analytical Modeling of Pulse Transformers for Power Modulators

The parasitic capacitances of transformers significantly influence the resulting pulse shape of a power modulator system. In order to predict the pulse shape and optimize the geometry of the pulse transformer before building the transformer, an equivalent circuit and analytic expressions relating the geometry with the parasitic elements are needed. Therefore, a model consisting of 6 equivalent capacitors and a simplified circuit, as well as the belonging equations, are presented. The equations are verified by measurement results for a pulse transformer and a solid-state modulator designed for linear accelerators