The Research Of Continuous-Adjustable Output Converter Based On Soft-switching

In recent years, with the rapid progress of power electronics, DC power supply has been applied to field of computer, communication, electrical systems, aeronautics and so on. According with the miniaturization, high frequency and high efficiency requirements of electronic equipment, soft-switching technique has become the hottest research direction of power electronics, and also has been widely applied.This dissertation has researched the continuous-adjustable output converter based on soft-switching. Several kind of DC/DC resonant converters have been systemically analyzed and compared.The feasibility of continuous-adjustable output converter based on soft-switching has been analyzed by AC analytical method and EDF technique and proved by simulation and experimental results at last.The beginning of the dissertation has introduced the background, meaning, work and innovation of the research;The principles of different DC/DC resonant converters, especially SPRC, the combination of SRC and PRC, have been introduced in Chapter two;Chapter three, DC/DC resonant converters have been analyzed by AC analytical method, the feasibility of continuous-adjustable based on soft-switching is proved in theory. EDF technique has been used to analyze a multi-element resonant converter, and also the small-signal model was acquired to analyze its characters at last;Chapter 4, simulation and experiment have been made on half-bridge SPRC resonant converter. The simulation and experimental results prove that the continuous-adjustable output resonant converter is realized.The last part of the dissertation shows the future of continuous-adjustable output resonant converters and some questions unfinished.