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Novel zero-voltage and zero-current-switching (ZVZCS) full bridge PWM converter using transformer auxiliary winding

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5 Author(s)
Cho, J.G. ; Power Electron. Res. Div., Korea Electrotechnol. Res. Inst., Changwon, South Korea ; Baek, J.W. ; Yoo, D.W. ; Lee, H.S.
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A novel zero voltage and zero current switching (ZVZCS) full bridge (FB) PWM converter is proposed to improve the demerits of the previously presented ZVZCS-FB-PWM converters such as use of lossy components or additional active switches. A simple auxiliary circuit which includes neither lossy components nor active switches provides ZVZCS conditions to primary switches, ZVS for leading-leg switches and ZCS for lagging-leg switches. Many advantages including simple circuit topology, high efficiency, and low cost make the new converter attractive for high power (>1 kW) applications. The operation, analysis, features and design considerations are illustrated and verified on a 2.5 kW, 100 kHz IGBT based experimental circuit

Published in:

Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE  (Volume:1 )

Date of Conference:

22-27 Jun 1997