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。

中图分类号： TN86
文献标识码： A
DOI：10.16157/j.issn.0258-7998.200247
中文引用格式： 崔俊国. 一种高效无感AC/DC开关电源拓扑结构[J].电子技术应用，2020，46(9)：114-117.
英文引用格式： Cui Junguo. A high efficiency AC/DC switching mode power supply topology without inductor[J]. Application of Electronic Technique，2020，46(9)：114-117.

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

Abstract： 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.

Key words : high efficiency；switching mode power supply；non-inductor