Novel zero-voltage and zero-current-switching full bridge PWMconverter using transformer auxiliary winding |
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| Authors: | Jung-Goo Cho Ju-Won Baek Chang-Yong Jeong Dong-Wook Yoo Kee-Yeon Joe |
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| Affiliation: | Power Electron. Res. Group, Korea Electrotechnol. Res. Inst., Changwon; |
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| Abstract: | A novel zero voltage and zero current switching (ZVZCS) full bridge (FB) pulse width modulation (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 (>2 kW) applications. The operation, analysis, features and design considerations are illustrated and verified on a 2.5 kW, 100 kHz insulated gate bipolar transistor (IGBT) based experimental circuit |
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