新型有源钳位正激软开关变换器的研究

针对模块电源的发展趋势和有源钳位电路的工作原理,研究了一种采用磁放大技术和固定伏特秒控制技术的有源钳位正激软开关电路,并对该电路的工作过程进行了详细的理论分析.在此基础上,设计了一款25 W的电源样机.经过测试,验证了该理论分析的正确性,在整个负载范围内完全实现了主开关管和钳位开关管的软开关变换,软开关实现的条件不依赖...

Research on a new active clamp forward converter with soft switching

According to the development trend of the module power supplies and the working principle of active clamping circuit, the paper studied a kind of active clamp forward soft switching circuit which employs magnetic amplification technology and fixed volts seconds control technology,and detailed theoretical analysis of the working process of the electric circuit is made in the paper.On the basis of theoretical analysis,a 25 W power prototype was designed.After tests,the theoretical analysis was verified correct.In the whole load range,soft switch transform between the main switch tube and clamp switch tube was completely realized, and soft switch realization conditions was not dependent on transformer parameters.In using the schottky diodes rectifier,the conversion efficiency in full load was 89%above.