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针对改进型倍流整流电路零电压开关PWM全桥变换器 (CDRZVSPWMFB变换器 ) ,讨论了超前管和滞后管各自实现ZVS的特点 ,对滤波电感的电感值和阻断电容的电容值进行了优化选择 ,使变换器在很宽的负载和输入电压范围内实现开关管的ZVS ,输出整流二极管实现自然换流 ,没有电压尖峰 ,同时对变压器的漏感没有严格要求 .通过一个 5 40W的原理样机验证改进型变换器的工作原理和设计的正确性 ,最后给出了实验结果 .
Aiming at the zero voltage switching PWM full bridge converter (CDRZVSPWMFB converter) of the improved double current rectifier circuit, the characteristics of the ZVS in the lead tube and the hysteresis tube were discussed, and the inductance of the filter inductor and the capacitance of the blocking capacitor were optimized Choose to enable the converter in a wide range of load and input voltage to achieve switching ZVS, the output rectifier diode to achieve natural commutation, no voltage spikes, while the transformer leakage inductance is not strictly required by a 5 40W prototype Verify the working principle of the improved converter and the correctness of the design, and finally give the experimental results.