Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2006-04-04
2006-04-04
Riley, Shawn (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
Reexamination Certificate
active
07023711
ABSTRACT:
The object of the present invention is to improve the power factor and at the same time to obtain a high efficient operation. It is constituted such that one terminal of a DC power supply12from which a pulsating flow is obtained is connected to a connection mid point of one terminal of a primary winding15aand the other terminal of an auxiliary winding15cwound in phase on a converter transformer15by means of a series circuit of a choke coil13and a first diode14;one terminal of the auxiliary winding15cof the converter transformer15is connected to the other terminal of the DC power supply12through a first capacitor16and at the same time the other terminal of the primary winding15ais connected to the other terminal of the DC power supply12through a switching device17;a secondary winding15bwound in counter phase with the primary winding15afor the converter transformer15is connected to a DC voltage output terminal19a,19bthrough a rectifying circuit18;the DC voltage output terminal19ais connected to an input side of a pulse width modulation control circuit20;and an output terminal of the pulse width modulation circuit20is connected to a control electrode of the switching device17.
REFERENCES:
patent: 6005780 (1999-12-01), Hua
patent: 6088242 (2000-07-01), Koegel et al.
patent: 6496389 (2002-12-01), Yasumura
patent: 0673106 (1995-09-01), None
patent: 2000-351250 (2000-12-01), None
Kananen Ronald P.
Rader & Fishman & Grauer, PLLC
Riley Shawn
Sony Corporation
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