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| Interleaved Critical Conduction Mode Boost PFC Converter with Coupled Inductor |
| Yang Fei1, Ruan Xinbo1, Yang Yang1, Ji Qing1, Ye Zhihong2 |
1. Nanjing University of Aeronautics and Astronautics Nanjing 210016 China;
2. Lite-On Technology Corp. Nanjing 210019 China |
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Abstract Boost power factor correction (PFC) converter operating in critical conduction mode (CRM) features high input power factor, zero-current turn-on for power switch, and zero-current turn-off for diode. Employing interleaving technique can reduce the input current ripple and the output capacitor RMS current. This paper discusses the two-phase interleaved CRM Boost PFC converter with the inversely coupled inductor. The coupling effect on switching frequency is analyzed, and the design procedures including inductance, turns number and air gap are introduced step by step under the conditions that the minimum switching frequency is larger than 20kHz and the core is not saturated. The inversely coupling can reduce the inductors’ turns number. The experimental results are presented at last.
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Received: 29 March 2011
Published: 27 November 2013
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2013, Vol. 28 
