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并联交错临界连续PFC变换器的单周期控制
引用本文:蒋志宏,黄立培,朱纪洪.并联交错临界连续PFC变换器的单周期控制[J].清华大学学报(自然科学版),2007,47(7):1197-1200.
作者姓名:蒋志宏  黄立培  朱纪洪
作者单位:1. 清华大学,计算机科学与技术系,北京,100084
2. 清华大学,电机工程与应用电子技术系,北京,100084
摘    要:为了利用临界连续导电模式功率因数校正器(PFC)高效的优点,将其应用到较大功率场合,提出一种用于临界连续PFC的单周期控制策略。采用开关频率和采样频率可变的方法,利用单数字信号处理器实现了3个临界连续PFC变换器的并联交错运行。提出的针对临界连续PFC变换器的单周期控制器无需对开关的高频峰值电流、电感电流过零点进行检测与判断,简化了临界连续PFC变换器的控制。实验结果表明:该方案可实现临界连续PFC变换器输入电流和输出电压的有效控制,可在保证高的输入功率因数同时,获得稳定的直流输出电压。

关 键 词:电源  临界连续导电模式  功率因数校正器  单周期  并联交错  数字控制
文章编号:1000-0054(2007)07-1197-04
修稿时间:2006年1月10日

One-cycle controller for parallel-connected interleaving critical continous conduction mode PFC converter
JIANG Zhihong,HUANG Lipei,ZHU Jihong.One-cycle controller for parallel-connected interleaving critical continous conduction mode PFC converter[J].Journal of Tsinghua University(Science and Technology),2007,47(7):1197-1200.
Authors:JIANG Zhihong  HUANG Lipei  ZHU Jihong
Abstract:This paper proposes a one-cycle controller for a critical conduction mode(CRM) power factor correction(PFC) converter,and with variable switchingfrequency and variable sampling-frequency used to have three CRM PFC modules operating in paralleling and interleaving mode with a single digital signal processor(DSP).The one-cycle controller for the CRM PFC needs not detect the peak switching current and judge the zero-cross of the inductor current,so it can simplify control of the CRM PFC converter at a great extent.Experiments show that the controller provides very effective control of the current input and the voltage output,so it can achieve stable output voltage with high input power factor.
Keywords:power supply  critical conduction mode  power factor correction  one-cycle  paralleling and interleaving  digital control
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