并联交错临界连续PFC变换器的单周期控制  

One-cycle controller for parallel-connected interleaving critical continous conduction mode PFC converter

作　　者：蒋志宏[1] 黄立培[2] 朱纪洪[1] 

机构地区：[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

出　　处：《清华大学学报（自然科学版）》2007年第7期1197-1200,共4页Journal of Tsinghua University(Science and Technology)

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。This paper proposes a one-cycle controller for a critical conduction mode （CRM） power factor correction （PFC） converter, and with variable switching-frequency 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.

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 

分 类 号：TN86[电子电信—信息与通信工程]