【作者】 李宾绪；

【导师】 甘克启；

【作者基本信息】 华北电力大学 ， 电力系统及其自动化， 2001， 硕士

【摘要】 全桥变换器通常采用的两种典型的控制方式是PWM控制及移相控制。传统的PWM控制方式中，功率管工作在硬开关状态，功率管承受的应力大，开关损耗大；采用移相控制时，滞后管的零电压开关（ZVS）受多种因素影响，实现比较困难。因此，本文在传统PWM控制方式的基础上，使其中两只功率管的关断适当延时，从而使这两只功率管实现零电流开关（ZCS）。 本文首先对该变换电路的运行模式和工作原理进行了分析，确定了电源的初步方案；然后使用仿真软件对电路的运行情况进行了仿真测试，在此基础上，针对该电路的缺点，对电源变换器的结构进行了改进和完善；最后，对电源电路进行了安装和调试，试制了一台样机，对样机进行了实验，并对样机的实验结果和电路的仿真结果进行了比较分析。更多还原

【Abstract】 PWM control mode and phase-shift control mode are typically used in full bridge PWM converter. In the traditional PWM control mode, power components work in the hard-switching mode, sustain great stress, and the switching loss is very large; As phase-shift control mode is used, zero- voltage-switching (ZVS) is very difficult to realize because of many factors. So that, based on the traditional PWM control mode, the turn-off of the two power components in the full bridge PWM converter are delayed, consequently, zero-current-switching (ZCS) is realized. First, this thesis analyzes operation mode and operation mechanism of the converter circuit, based on this, primary project of the power supply have been designed. And then, the paper simulates the operation principle of the power supply using simulation software, basing the result of simulation analysis, the topology of the converter is improved and perfected to supply the gap. At last, the circuits are installed and debugged, a example machine is developed and experimented. Then, we compare and analyze the experiment result and the simulation result.更多还原