Title :
Elimination of transformer magnetizing current offset for digitally controlled phase-shift full-bridge converter
Author :
Cho, Je-Hyung ; Park, Ki-Bum ; Park, Jin-Sik ; Moon, Gun-Woo ; Youn, Myung-Joong
Author_Institution :
Dept. of Electr. Eng., KAIST, Daejeon, South Korea
fDate :
May 30 2011-June 3 2011
Abstract :
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.
Keywords :
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; Circuit faults; Leg; Magnetic switching; Resistance; Saturation magnetization; Switches; Voltage control; digital control; magnetizing current offset; phase-shift full-bridge converter; transformer saturation;
Conference_Titel :
Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on
Conference_Location :
Jeju
Print_ISBN :
978-1-61284-958-4
Electronic_ISBN :
2150-6078
DOI :
10.1109/ICPE.2011.5944379
