一种高效无感AC/DC开关电源拓扑结构  

A high efficiency AC/DC switching mode power supply topology without inductor

作　　者：崔俊国 Cui Junguo(Wuhu Risingchip Electronic Technology,Co.,Ltd,Shanghai 201209,China)

机构地区：[1]芜湖锐芯电子科技有限公司,上海201199

出　　处：《电子技术应用》2020年第9期114-117,共4页Application of Electronic Technique

摘　　要：提出一种高效率无电感的AC/DC开关电源拓扑结构。通过对中间储能电容放电电压(放电时间)最终值的控制,实现对该储能电容充电电压(充电时间)的控制,进而实现AC周期内的输出端稳压恒流。在中间储能电容充放电过程中,AC输入能量通过中间储能电容直接传输给负载端;同时中间储能电容充电阶段存储的能量在中间储能电容放电阶段也全部传输给负载端,从而提高了AC能量传输效率,进而提高了整个电路的效率。在中间储能电容充放电过程中,AC输入电压的时间变化率决定中间储能电容的充放电电流瞬时值,进而决定了输入电流瞬时值。This paper presents a high efficiency AC/DC switching power supply topology without inductor.Through the control of the final discharging voltage(discharge time)of the energy-storage capacitor,the initial charging voltage of the capacitor is controlled.So the output load can get the constant voltage or constant current.In the charging and discharging process of the energy-storage capacitor,the AC input energy is directly transmitted to the load terminal through the energy-storage capacitor.At the same time,the energy stored in the energy-storage capacitor is fully transferred to the load terminal.So this topology transition efficiency is high.In the charging and discharging process of the energy-storage capacitor,the rate of the AC input voltage determines the instantaneous value of the charging and discharging current of the energy-storage capacitor,and then determines the instantaneous value of the input current.

关 键 词：高效率 开关电源 无电感 

分 类 号：TN86[电子电信—信息与通信工程]