一种变占空比控制电流断续模式Boost功率因数校正变换器的仿真研究

Simulation research on variable duty ratio control based Boost power factor correction converter with discontinuous current mode

电感电流断续模式Boost功率因数校正变换器已广泛应用于各类电力电子装置中。为进一步提高变换器的输入功率因数、减小谐波污染,设计了一种基于平均电流的变占空比控制的电流断续模式Boost功率因数变换器。通过研究恒定占空比控制的变换器基本原理,推导出一种变占空比控制的方式,设计了合理的电路参数并搭建了仿真电路模型。仿真结果证明,该变占空比控制的方法能提高变换器的输入功率因数,减小谐波畸变。

The Boost power factor correction converter with discontinuous current mode has been widely used in various power electronic devices.In order to improve the input power factor and reduce the harmonic pollution of the converter,a Boost power factor converter with discontinuous current mode was designed,which is based on variable duty ratio control and average current control.By studying the basic principle of the converter based on constant duty ratio control,a variable duty ratio control mode is deduced,the reasonable circuit parameters are designed,and the simulation circuit model is established.The simulation results show that the variable duty ratio control method can improve the input power factor and reduce the harmonic distortion of the converter.