摘要
介绍了采用单一电流传感器检测功率因数校正主电路中电感电流信号的控制方法.该方法可同时控制输入电流波形和输出电压,不需要分别检测输入电压和输出电压.被检测的电感电流主要用在2个方面:一是用于与锯齿波信号相比较去控制输入电流的波形;另一是用于当主开关处于开通或关断状态时,通过对电感电流变化率的处理得出输入和输出电压信号.同传统的APFC相比较,该方法具有以下优点:(1)不再使用耗能的分压电阻器采集信号;(2)自然实现了功率转换级同控制级的电气隔离;(3)不必进行复杂的数字采样和大量计算.
This paper presents the realization of a boost-type active power factor corrector (APFC) using a single current sensor to sense the inductor current for input current shaping and output voltage regulation. Neither input voltage nor output voltage sensing is needed. The first one is for comparing with a sawtooth signal in order to shape the input current waveform. The second one is for determining the input and output voltages by processing the rates of change of the inductor current when the main switch is in on and off states, respectively. Compared to conventional APFCs, the proposed technique has several advantages. First, no dissipative voltage divider is required. Second, electrical isolation between the power conversion stage and the control stage can be achieved inherently. Third, no computations are needed.
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2003年第4期535-539,共5页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
