辅助开关零电流关断的零电压过渡PWM正激电路  

Zero Voltage Transition PWM Forward Converter with Zero current Turnoff Auxiliary Switch

作　　者：杨旭[1] 王兆安[1] 

机构地区：[1]西安交通大学

出　　处：《电力电子技术》1999年第3期20-22,共3页Power Electronics

摘　　要：针对正激型电路分析了零电压过渡ＰＷＭ软开关拓扑存在的辅助开关是硬开关的问题，提出了一种新的辅助开关零电流关断的拓扑，新的拓扑具有效率高、电路简单、易于实现和变压器磁心利用率高的优点。在输出功率为１００Ｗ的装置上进行了实验，同硬开关电路相比，新电路的效率提高３％～４％。Aimed at the forward converter,the shortcomings of auxiliary switch at hard switching condition in ZVT PWM soft switching topology are analyzed,and a new topology with zero current turnoff auxiliary switch is introduced,which has the merits of simplicity,high efficiency,easy to realize and high utilization of magnetic core.Experiments are carried out on a 100 walts prototype.The efficiency of the new circuit is 3%～4% higher than the hard switched one.

关 键 词：软开关 零电流关断 零电压过渡 电源装置 PWM 

分 类 号：TM91[电气工程—电力电子与电力传动] TN86[电子电信—信息与通信工程]