一种无动态调整过程的新型DC/DC变换技术

A Novel DC/DC Converter and Control Technique without Regulation Process

介绍了一种新型的DC/DC变换器拓扑结构和控制技术。基于能量变换的控制技术在得到要求的输出电压同时有着低的输出纹波,不需要变压器且去除了传统闭环控制系统的动态调整过程。仿真和实验结果显示,采用功率因数校正的方法消除输入电流的畸变,可使该变换器具有正弦输入电流和单位输入功率因数。

The paper introduces a novel DC/DC converter and its control technique. The important feature of this con-verter is that its output voltage can be regulated to a desired step-down value with a low output voltage ripple by control-ling charge transfer between two capacitors, so that the needs for a step-down transformer and dynamic regulation process are eliminated. To decrease the harmonic distortion in source current, a commercially available boost preregulator is used for power factor correction. The results of simulation and experiment shown that the converter exhibits a near sinusoidal source current with low harmonic distortion and a high input power factor.