【作者】 吴俊昭；

【导师】 石季英；

【作者基本信息】 天津大学 ， 电工理论与新技术， 2004， 硕士

【摘要】 近年来电力电子技术迅猛发展，直流开关电源广泛应用于计算机、邮电通讯、电力系统和航空航天等领域。软开关技术顺应电子设备的日益小型化、高频化、高效率的要求，成为了电力电子领域中极热门的研究方向并且得到了广泛的应用。本文对软开关条件下直流开关电源输出连续可调节进行了研究，系统的分析了各种DC/DC谐振变换器的电路拓扑结构以及工作原理，并通过交流分析法以及EDF小信号技术，从理论上研究了基于各种谐振变换器实现输出连续可调节的可行性。最后对串并联谐振变换器进行了仿真和试验，结果表明实现了软开关条件下变换器输出的连续可调节。第一章介绍了论文的相关研究背景，选题意义，以及论文的主要工作及创新点。第二章主要介绍了各种DC/DC谐振变换器的电路拓扑结构以及工作原理，特别分析了串并联谐振变换器，它是串联谐振变换器和并联谐振变换器的结合；第三章通过交流分析法对各种谐振变换器进行了分析，从理论上得出各种谐振变换器实现软开关条件下输出连续可调节的可行性。同时运用EDF小信号分析法对一种多元件谐振变换器－级联型谐振变换器进行了建模分析，分析了其实现软开关条件下输出连续可调节的可行性以及特性；第四章对半桥式串并联谐振变换器进行了仿真和实验，仿真和实验结果表明，串并联谐振变换器实现软开关条件下输出电压较大范围内的连续可调节；最后对本论文所做的工作进行了总结，说明了软开关条件下输出连续可调节变换器的应用前景以及一些待解决的问题。更多还原

【Abstract】 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.更多还原