基于BOOSt结构下不连续导电模式的PFC电路

采用现代高频功率变换技术的有源功率因数校正（Power Factor Corrector,PFC)技术是解决高频开关变换器谐波污染的有效手段。与传统的PFC电路相比，有源PFC电路的输入电流接近正弦波且与输与电压同相位，能有效抑制电流波形畸变和谐波，因此避免了对同一电网设施的干扰。在PFC电路中，Boost变换器是研究和应用得最多的一种变换器。本文着重分析了Boost电路在不连续导电模式状态下，PFC电路的临界条件，对实际电路结构的设计有很好的指导意义。

Discontinuous Conducting Mode PFC Circuit on the Basis of Boost Constructure

It is effect to solve the harmonic pullution in the high frequency switching mode converter with the active power factor corrector(PFC)of the modern high frequency power conversion technology. Comparing with the traditional PFC circuit, the waveform of input current in the active PFC circuit is similar to the sine wave and in the same phase position, which can effectively restrict the distortion of the current waveform and harmonic to avoid the disturbance to the equipment in same electric network. In the PFC circuit, boost converter is the converter which is researched and used widestly. The article analyzes the critical conditions of PFC circuit when the boost circuit is under the discontinuous current mode, which is significantly instructive to the design of the practive circuit scheme.