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ZHOU Di,BEN Hongqi,HUANG Yiyi.Research on Secondary-side Parasitic Oscillation Reductionin in ZVZCS Full-Bridge Converter Using Active Clamp[J].JOURNAL OF POWER SUPPLY,2019,17(1):10-20
Research on Secondary-side Parasitic Oscillation Reductionin in ZVZCS Full-Bridge Converter Using Active Clamp
Received:February 18, 2017  Revised:July 18, 2018
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DOI:10.13234/j.issn.2095-2805.2019.1.10
Keywords:active clamp  zero-voltage zero-current switching(ZVZCS)  full-bridge converter  parasitic oscillation
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AuthorInstitutionEmail
ZHOU Di School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin , China skytian2014@163.com
BEN Hongqi School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin , China
HUANG Yiyi School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin , China
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Abstract:
      To realize zero-current switching for switches on a lagging leg, an active clamp circuit was added to the secondary side of a power transformer in a phase-shift full-bridge converter. Meanwhile, the parasitic oscillation at the output rectifier diode was effectively reduced by the introduced active clamp circuit. To analyze the reduction effect of the active clamp circuit and the influence of its relevant parameters, the process of parasitic oscillation reduction was divided into two stages, which were further analyzed in depth. In addition, the influence of two key parameters on the reduction effect was discussed in detail, together with the corresponding design principle. Finally, the above analysis and the reduction effect were verified by experimental results from a 4.8 kW/300 V, 20 kHz prototype.
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