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中文摘要：
分析工作于伪连续导电模式（PCCM）的Boost功率因数校正（PFC）变换器，设计电压环与电流环并行的控制环路。针对传统连续导电模式（CCM）和不连续导电模式（DCM）Boost PFC变换器负载功率范围受限的问题，研究以负载电流为基准量实时调整参考电流的控制策略，给出其网侧输入电流和功率因数的表达式。为了在宽输入电压范围内提高正弦参考电流控制三态PCCM Boost PFC变换器的功率因数（PF），提出非正弦参考电流控制算法。此外建立小信号模型给出其频域分析结果。最后通过实验结果验证了理论分析的正确性。
英文摘要：
A Boost power factor correction （PFC） converter operating in pseudo continuous conduction mode （PCCM） is analyzed and side-by-side voltage and current control loops is proposed. In order to extend the load power range of the conventional Boost PFC converter operating in continuous conduction mode （CCM） and discontinuous conduction mode （DCM）, a control strategy to adjust the reference current with respect to the load is designed. The input current and PF expression of the tri-state PCCM Boost PFC converter is also derived. To improve the input power factor （PF） of the tri-state PCCM Boost PFC converter with sinusoidal reference current control strategy over whole input voltage range, the non-sinusoidal reference current control strategy is proposed. Besides, the frequency domain analysis based on small-signal mode is given. Finally, the tri-state PCCM Boost PFC converter prototype is built and the experimental results verify the analysis results.
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