Design, realization and comparison of compact size resonant converters for low stored-energy high voltage application

摘要

High performance compact high voltage power converters for stored energy limited application calls for stringent measures for limiting power delivery to load under abnormal working conditions. The choice of power converters for such application is limited due to high efficiency requirement and compactness at the same time. Choosing a high switching frequency allows designer to compact the volume by shrinking the magnetics. However the switching losses encountered in the power switching devices and the magnetics play a limiting role. Employing a series load resonant converter (SRC) or a parallel resonant converter (PRC) or a combination of both yields promising features for simultaneous addressing of improving the efficiency and reducing the size requirements. This paper brings out an effort made in comparing two converters working on SRC and PRC principles for delivering approximately 100W at 2500V output, which represents a generic requirement for powering a travelling wave tube (TWT).