Small Size Power Supply for High Voltage Application

In this paper, the guidelines to design a high voltage power converter based on the PRC-LCC resonant topology with a capacitor as output filter are established. The mathematical analysis employed uses an original equivalent circuit for the topology, marking its limits. As a consequence of the selection of this topology, transformer ratio, and therefore secondary volume, is reduced. A new way to construct high voltage transformers is also proposed, pointing out the advantages and establishing an original method to evaluate the stray components of the transformer before construction. The way to make compatible the characteristics of both, topology and transformer, is illustrated in the frame of a practical application. To demonstrate the feasibility of this solution, a high voltage, high power prototype is assembled and tested with good performance and similar behaviour to those predicted by the models. Experimental results are shown on this particular.