Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2005-08-30
2005-08-30
Laxton, Gary L. (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
Reexamination Certificate
active
06937483
ABSTRACT:
A device and method of commutation control for an isolated boost converter provides a unique commutation logic to limit voltage spikes by utilizing switches on the secondary side to minimize a mismatch between current in the inductor and current in the leakage inductance of the transformer when commutation takes places. To minimize this mismatch, the current in the leakage inductance is preset at a certain level that approaches the current in the inductor prior to the commutation, thus significantly reducing the power rating for a clamp circuit and enabling use of a simple passive clamp circuit. In addition, through unique timing of the turn-on of the secondary switches, soft switching conditions are created that eliminate turn-on losses and the reverse recovery problems of free-wheeling diodes.
REFERENCES:
patent: 3582758 (1971-06-01), Gunn
patent: 4953068 (1990-08-01), Henze
patent: 5027264 (1991-06-01), DeDoncker et al.
patent: 5157592 (1992-10-01), Walters
patent: 5198969 (1993-03-01), Redl et al.
patent: 5208740 (1993-05-01), Ehsani
patent: 5329439 (1994-07-01), Borojevic et al.
patent: 5353212 (1994-10-01), Loftus, Jr.
patent: 5418704 (1995-05-01), Hua et al.
patent: 5539630 (1996-07-01), Pietkiewicz et al.
patent: 5550450 (1996-08-01), Palko et al.
patent: 5559685 (1996-09-01), Lauw et al.
patent: 5574636 (1996-11-01), Lee et al.
patent: 5590032 (1996-12-01), Bowman et al.
patent: 5594634 (1997-01-01), Rajashekara et al.
patent: 5684683 (1997-11-01), Divan et al.
patent: 5742495 (1998-04-01), Barone
patent: 5781419 (1998-07-01), Kutkut et al.
patent: 5838558 (1998-11-01), Tan et al.
patent: 5872705 (1999-02-01), Loftus, Jr., et al.
patent: 5886884 (1999-03-01), Baek et al.
patent: 5946200 (1999-08-01), Kim et al.
patent: 5986899 (1999-11-01), Xia et al.
patent: 5999417 (1999-12-01), Schlecht
patent: 6016258 (2000-01-01), Jain et al.
patent: 6038142 (2000-03-01), Fraidlin et al.
patent: 6118678 (2000-09-01), Limpaecher et al.
patent: 6452815 (2002-09-01), Zhu et al.
Watson, R. et al., “A Soft-Switched, Full-Bridge Boost Converter Employing an Active-Clamp Circuit,”IEEE PESC Rec., pp. 61-68, 1996.
Wang, K. et al., “Bi-Directional Full-Bridge DC/DC Converter with Unified Soft-Switching Scheme, Part I: Principles of Operation,” inProceedings of the VPEC Annual Seminar, 1998, pp. 143-149.
Wang, K. et al., “Bi-Directional Full-Bridge DC/DC Converter with Unified Soft-Switching Scheme, Part II: Design, Implementation, and Experimental Results,” inProceedings of the VPEC Annual Seminar, 1998, pp. 151-157.
Xu Xingyi
Zhu Lizhi
Ballard Power Systems Corporation
Laxton Gary L.
Seed IP Law Group PLLC
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