대한전기학회논문지:전기기기및에너지변환시스템부문B (The Transactions of the Korean Institute of Electrical Engineers B)

대한전기학회 (The Korean Institute of Electrical Engineers)
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단일 스위칭소자를 이용하여 환류다이오드의 전압스트레스를 강하시킨 소프트-스위칭 벅 컨버터

Soft-Switching Buck Converter Dropped Voltage Stress of a free-Wheeling Diode Using a Single Switching Device

  • 발행 : 2004.09.01
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초록

This paper presents a buck circuit topology of high-frequency with a single switching device. It solved the problem which arised from hard-switching in high-frequency using a resonant snubber and operating under the principle of ZCS turn-on and ZVS turn-off commutation schemes. In the existing circuit, it has the voltage stress that is almost twice of input voltage in a free-wheeling diode. In the proposed circuit, it has the voltage stress that is lower than input voltage with modifing a location of free -wheeling diode. In this paper, it expained the circuit operation of each mode and analyzed feedback-loop stabilization. Also it confirmed the waveform of each mode with simulation result. The experiment result verified the simulation waveform and compared the voltage stress of a free -wheeling diode in the exsiting circuit with the voltage stress of that in the proposed circuit. Moreover, it compares and analyzes the proposed circuit's efficiency with the hard-switching circuit's efficiency according to the change of load current.

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참고문헌

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  3. Xuezhi WU, Xinmin JIN, Lipei HUANG and Guang FENG, 'A Lossless Snubber for DC-DC Converter and Its Application in PFC', Proceeding of IPEMC 2000, Vol. 3, pp. 1144-1149, 2000
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