Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1997-03-13
1998-06-09
Berhane, Adolf
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363132, H02M 3335
Patent
active
057644942
ABSTRACT:
A switching converter achieves improved regulation range by the use of a saturable reactor in series with a transformer primary. The saturable reactor uses a conventional magnetic pot core including a magnetic shell and center post. The location at which the post joins the shell is perforated to reduce the cross-section of magnetic material, so that, at low reactor currents, incremental inductance is established by the gap between post and lid, and at high reactor currents, the incremented inductance is established by saturation at the base of the post. Perforation at the base of the post also results in generation of heat at a location immediately adjacent the flat bottom of the pot core.
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"An Improved Full-Bridge Zero-Voltage-Switched PWM Converter Using A Saturable Inductor", by Hua et al, publ. in the IEEE Transactions on Power Electronics, vol. 8, No. 4, Oct. 1993. pp. 530-534.
Earls William George
Schutten Michael Joseph
Berhane Adolf
Lockheed Martin Corporation
Meise W. H.
Weinstein S. D.
Young S. A.
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