Analysis of Boost PFC Converters Operating in the Discontinuous Conduction Mode
Analysis of Boost PFC Converters Operating in the Discontinuous Conduction Mode
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DOI：
10.1109/tpel.2011.2160206
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发表时间：
2011-06
影响因子：
6.7
通讯作者：
Xiaotian Zhang;Joseph W. Spencer
中科院分区：
文献类型：
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作者：
Xiaotian Zhang;Joseph W. Spencer
低功率应用中的功率因数校正(PFC)转换器通常工作在不连续导通模式(DCM)，在连续导通模式(CCM)下工作会产生输入电流失真。这种失真可以在一个线路周期的几个开关周期中观察到。推导了异步开关映射图，得到了输入电流和输出电压的时域波形。可以看出，产生失真的原因是电流导通模式的改变。建立了开关频率和占空比固定的PFC变流器工作在DCM模式下的数学模型，该模型可以预测实际情况下PFC变流器的工作模式。基于所提出的模型，分析了输出电压和功率限制。仿真和实验结果验证了该方法的有效性。
As power factor correction (PFC) converters for low-power applications usually operate in the discontinuous conduction mode (DCM), operating in continuous conduction mode (CCM) will produce input current distortion. This distortion can be observed in a few switching cycles of one line cycle. Asynchronous switching maps are derived to obtain the time-domain waveforms of input current and output voltage. It can be seen that the cause of the distortion is the change in the current conduction mode. A model for PFC converters operating in DCM with fixed switching frequency and duty-ratio is developed, which can predict the converter operation mode under practical circumstances. Analysis of the output voltage and power limitations is provided based on the proposed model. Simulation and experimental results are presented to verify the proposed method.