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Quadratic Boost PFC Converter with Fast Dynamic Response and Low Output Voltage Ripple |
Zhou Qun1, Dong Zheng2, Yang Ping2, Shu Lisan2 |
1. Sichuan University Chengdu 610065 China; 2. Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education, Southwest Jiaotong University Chengdu 610031 China |
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Abstract In order to improve load transient response and to reduce the second-order line frequency ripple in the output voltage of power factor correction(PFC) converter, quadratic boost converter as a PFC converter is studied in this paper. The operation modes of quadratic boost converter are discussed. According to the operation modes of inductor current, quadratic boost PFC converter can be divided into four different operation modes: CCM-CCM, CCM-DCM, DCM-CCM and DCM-DCM. This paper focus on the study of dynamic performance and output voltage ripple of quadratic DCM-DCM boost PFC converter. Compared with traditional DCM boost PFC converter, quadratic DCM-DCM boost PFC converter can obviously reduce the second-order line frequency ripple of output voltage and the peak current of input inductor. It can also decrease output voltage overshoot/undershoot and dynamic response speed during transient. Experimental results are given to verify the analysis results.
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Received: 20 May 2013
Published: 29 June 2015
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