Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2005-09-27
2009-06-30
Vo, Tuyet (Department: 2821)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S021080, C363S017000, C363S016000, C363S015000, C361S764000, C361S761000, C361S748000, C361S709000
Reexamination Certificate
active
07554822
ABSTRACT:
Power converter for receiving an input current at an input voltage and for providing an output current at an output voltage. The power converter comprises a transformer (133) having a primary (136) and at least one secondary (138) side, wherein the transformer shows a mutual inductivity Ls. The power converter further comprises at least one switching device (124a, 124b) being operated at an operating frequency fopat the primary side of said transformer, and a capacitor CSat the primary side of the transformer. The capacitor forms a resonant circuit with the leakage inductivity LSof said transformer, wherein said operating frequency, said capacitor Cs, said mutual inductivity Lmand said leakage inductivity LSare matched such that the effective value of the output current is substantially constant with respect to variations of a load being traversed by said output current by using resonance principles and operating the power converter in a current source mode.
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Neubert Tom
Waffenschmidt Eberhard
Koninklijke Philips Electronics , N.V.
Vo Tuyet
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