Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2007-07-24
2007-07-24
Patel, Rajnikant B. (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S037000, C363S089000
Reexamination Certificate
active
10499233
ABSTRACT:
The circuit arrangement has a mains connection, a mains switch and a switched-mode power supply which contains a power factor coil for power factor correction. In this case, the mains switch has two switching contacts, one of which is arranged in a supply line between the mains connection and the switched-mode power supply, and in this way switches the phase or neutral conductor of the 50 Hz line network off and on. The connections of the second switching contact are located in a voltage supply for the driver circuit of the switched-mode power supply, and the second switching contact switches the switching transistor in the switched-mode power supply off when the circuit arrangement is switched off, by its control voltage being switched off directly or indirectly. The switching contact of a relay is arranged in parallel with the first switching contact of the mains switch, and the control coil of this relay is connected to an output voltage of the switched-mode power supply. Since the output voltages of the switched-mode power supply are each buffered by a capacitor, the relay is thus still open for a certain time after the arrangement has been switched off. The energy which is stored in the power factor coil is thus dissipated by the relay, by the coil drawing the current which is required to dissipate the energy from the mains via the relay.
REFERENCES:
patent: 4855890 (1989-08-01), Kammiller
patent: 6069800 (2000-05-01), Cross et al.
patent: 6330175 (2001-12-01), Shirato et al.
patent: 913915 (1999-05-01), None
patent: 1122872 (2001-08-01), None
Search Report Dated Oct. 1, 2003.
Hermann Wolfgang
Louvel Jean-Paul
Meitzner Michael
Fried Harvey D.
Henig Sammy S.
Laks Joseph J.
Patel Rajnikant B.
Thomson Licensing
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