摘要
研究了断续电流模式(DCM)下单相Buck电路作为功率因数校正器的拓扑电路和工作原理,给出了实现功率因数校正的临界条件和临界电感的计算公式;分析了输入电流产生畸变的原因和影响畸变程度的主要因素;分别用功率匹配法和等效电流源法对该电路的输出电压纹波进行了分析,总结了输入电流畸变与输出电压纹波的定性关系。仿真结果验证了理论分析的正确性,表明单相Buck功率因数校正器(即单相Buck PFC)可以满足通信电源对功率因数的要求。
The topology circuit configuration and operation principle are researched when single-phase Buck converter works as PFC in DCM condition, and the critical condition of the topology circuit as PFC and the formula of critical inductor are introduced, then these research provide engineering design with technical support. The reason why input current becomes abnormal and the main fac- tor that influences the abnormality degree are analyzed. The output voltage ripple is analyzed respectively by power matching method and equivalent current source circuit method, and the quality relation between input current abnormality and output voltage ripple is summarized. At last, the simulation results confirm the validity of the analysis, which indicate that the single - phase Buck PFC could satisfy the high power factor demand of modem communication source.
出处
《电力系统通信》
2006年第4期63-67,共5页
Telecommunications for Electric Power System
