Input impedance analysis of single-phase PFC converters
Input impedance analysis of single-phase PFC converters
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DOI：
10.1109/apec.2003.1179239
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发表时间：
2005
影响因子：
6.7
通讯作者：
Jian Sun
中科院分区：
文献类型：
--
作者：
Jian Sun
本文对单相升压功率因数校正 (PFC) AC-DC 转换器的输入阻抗进行了建模和分析。提出了输入阻抗的大信号模型，克服了传统分段线性化模型的局限性。该模型在从输出电压环路的交叉频率到转换器开关频率一半的频率范围内有效。提供升压单相 PFC 转换器的实验结果来验证模型。利用该模型研究了典型升压 PFC 转换器的输入特性，例如输入阻抗下降、输入电流的超前相位以及对失真输入电压的响应。还提出了一种简单的补偿技术，可减少输入阻抗的下降，从而提高转换器性能并最大限度地减少与输入滤波器或交流电源发生不良相互作用的可能性。
The input impedance of single-phase boost power factor corrected (PFC) AC-DC converters is modeled and analyzed in this paper. A large-signal model is presented for the input impedance which overcomes the limitations of traditional piece-wise linearized models. The model is valid at frequencies ranging from the crossover frequency of the output voltage loop to half the switching frequency of the converter. Experimental results from a boost single-phase PFC converter are provided to validate the model. Input characteristics of typical boost PFC converters, such as input impedance dipping, leading phase of the input current, and responses to distorted input voltages are studied by using the model. A simple compensation technique to reduce the dipping in the input impedance, thereby improving converter performance and minimizing the potential for undesirable interactions with the input filter or the ac source, is also presented.