Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2006-12-05
2006-12-05
Riley, Shawn (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S069000
Reexamination Certificate
active
07145785
ABSTRACT:
A power supply circuit is disclosed which performs constant voltage control by switching frequency control and is ready for a wide range while the necessary control range of the switching frequency control is reduced. The circuit includes a primary side series resonance circuit forming a current resonance type converter, and a secondary side series resonance circuit formed from secondary windings and secondary side series resonance capacitors while a coupling type resonance circuit by electromagnetic coupling of an insulating converter transformer is formed. To obtain a single-humped characteristic from the coupling type resonance circuit, a gap of approximately 1.6 mm is formed in the core of the insulating converter transformer so as to achieve a coupling coefficient of 0.65 or less. A secondary side DC output voltage is produced from outputs of the secondary windings so as to cope with a heavy load condition.
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Lerner David Littenberg Krumholz & Mentlik LLP
Riley Shawn
Sony Corporation
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