临界连续模式功率因数校正器的高频数字控制研究  

The Study of High-frequency Digital Control on Critical-Conduction-Mode Power Factor Correction

作　　者：蒋志宏[1] 黄立培[1] 蔡宣三[1] 

机构地区：[1]清华大学

出　　处：《电力电子》2007年第2期7-10,共4页Power Electronics

摘　　要：本文提出了一种无需检测电感电流及其过零点的简单数字控制方案,实现了临界连续模式功率因数校正器的控制。取得了功率开关管的ZVZCS,消除了整流二极管和快恢复二极管的反向恢复带来的损耗,提高了变换器的效率和可靠性;另外,数字控制器克服了模拟IC控制器的开关频率限制问题,消除了输入电流的低频畸变,提高了功率因数;同时,也降低了输入电感的值,降低了成本的同时提高了功率密度。为实现中小功率数字控制功率因数校正器的产品化提供了一个良好的解决方案。This paper presents a simple method to control critical-conduction-mode （CRM） PFC with DSP, and it need not detect inductor current and its zero-cross with circuits. It achieves high efficiency and reliability with ZVZCS and no loss of diode reverse-recovery. In addition, the low-frequency distortion of input current is removed with the digital controller instead of analog controller, the high-power-factor is achieved, and the high power density and low cost are achieved with small inductor. A desirable digital solution is presented for CRM PFC in small and middle power circumstance.

关 键 词：功率因数校正器 临界连续模式 高频数字控制 

分 类 号：TM714.1[电气工程—电力系统及自动化]