The improved current-doubler-rectifier zero-voltage-switching PWM full-bridge converter (CDR ZVS PWM FB converter) achieves ZVS for the switches in a wide load range with the use of the energy stored in the output fil...The improved current-doubler-rectifier zero-voltage-switching PWM full-bridge converter (CDR ZVS PWM FB converter) achieves ZVS for the switches in a wide load range with the use of the energy stored in the output filter inductances, and the rectifier diodes commute naturally, therefore no oscillation and voltage spike occurs. The transformer needs no special manufacture method to limit the leakage inductance. The ZVS achievement and the design considerations for the output filter inductances and the blocking capacitor are discussed for the improved CDR ZVS PWM FB converter. A 540 W prototype converter is built in the lab to verify the operational principle and design considerations for the improved converter, the experimental results are also included.展开更多
为了使开关电源达到高功率密度和易于便携的要求,采用高频PWM(Pulse Width Modulation)软开关控制方式,不但利于减小开关电源的体积,而且还能有效降低开关器件损耗和噪音。详细分析了零电压变换ZVS(Zero Voltage Switch)PWM脉宽调制Boos...为了使开关电源达到高功率密度和易于便携的要求,采用高频PWM(Pulse Width Modulation)软开关控制方式,不但利于减小开关电源的体积,而且还能有效降低开关器件损耗和噪音。详细分析了零电压变换ZVS(Zero Voltage Switch)PWM脉宽调制Boost变换器的软开关过程及实现软开关的条件,利用Saber软件对Boost电路在硬、软开关条件下进行了仿真验证。仿真结果表明ZVS PWM软开关变换技术具有开关损耗小、恒频控制和变换效率高等优点。展开更多
文摘The improved current-doubler-rectifier zero-voltage-switching PWM full-bridge converter (CDR ZVS PWM FB converter) achieves ZVS for the switches in a wide load range with the use of the energy stored in the output filter inductances, and the rectifier diodes commute naturally, therefore no oscillation and voltage spike occurs. The transformer needs no special manufacture method to limit the leakage inductance. The ZVS achievement and the design considerations for the output filter inductances and the blocking capacitor are discussed for the improved CDR ZVS PWM FB converter. A 540 W prototype converter is built in the lab to verify the operational principle and design considerations for the improved converter, the experimental results are also included.
