不对称半桥变换器的研究  

Research on Asymmetrical Half-bridge Converters

作　　者：陈丹江[1] 张仲超[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《电源技术应用》2003年第9期6-9,共4页Power Supply Technologles and Applications

摘　　要：介绍了一种利用互补的PWM控制的不对称半桥DC/DC变换器分析了电路的稳态过程和开关的ZVS过程,同时对开关达到ZVS的条件进行了分析实验结果表明了这种电路对提高效率的有效性。为了进一步改进电路,针对电路输出二极管的电压应_上的不平衡,提出了一种副边绕组不相等的拓扑。An asymmetrical half-bridge converter which can operated in ZVS is introduced. The basic operation principle and the condition of ZVS are analyzed. A prototype ol 72W, 12V converter was built to verify theoretical analysis of asymmetrical half-bridge. To improve the characteristic, another converter was proposed and analyzed as a solution, which uses asymmetric turn-ratios in the secondary side of the transformer.

关 键 词：不对称半桥 零电压开关 效率 

分 类 号：TM46[电气工程—电器]