Elimination of transformer magnetizing current offset for digitally controlled phase-shift full-bridge converter

Cho Jh Cho Je Hyung,Park Kb Park Ki Bum,Park Js Park Jin Sik, Moon Gw Moon Gunwoo,Youn Mj Youn Myung Joong

Power Electronics and ECCE Asia（2011）

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摘要

A transformer magnetizing current offset for a phase-shift full-bridge (PSFB) converter is dealt in this paper. A model of this current offset is derived and it is presented as a first order system having a pole at a low frequency when the effects from the parasitic components and the switching transition are considered. A digital offset compensator eliminating this current offset is proposed and designed considering the interference in an output voltage regulation. The performances of the proposed compensator are verified by experiments with a 1.2kW PSFB converter. The saturation of the transformer is prevented by this compensator.

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关键词

bridge circuits,digital control,magnetisation,switching convertors,transformers,voltage control,psfb converter,digital offset compensator,digitally controlled phase-shift full-bridge converter,output voltage regulation,parasitic components,power 1.2 kw,switching transition,transformer magnetizing current offset elimination,magnetizing current offset,phase-shift full-bridge converter,transformer saturation,phase shift,digital controller

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