Electricity: power supply or regulation systems – Inrush current limiters
Patent
1997-05-14
1999-07-06
Wong, Peter S.
Electricity: power supply or regulation systems
Inrush current limiters
323901, 363 49, H02M 704
Patent
active
059201860
ABSTRACT:
A power supply inrush current control circuit includes a current-limiting resistor connected in series with a first relay, a second relay connected in parallel with the current-limiting resistor and first relay, a power factor correction stage connected in series with the parallel combination of first relay and current-limiting resistor, and second relay, a holdup capacitor connected to an output of the power factor correction stage and a DC/DC converter connected to the output of the power factor correction stage. A first timer is connected to the second relay, a second timer is serially connected to the first timer and to the power factor correction stage, and a third timer is serially connected to the second timer and to the DC/DC converter. Upon energization of the power supply by an AC voltage source, the first relay is activated so as to connect the current-limiting resistor to the AC voltage source, and after a predetermined period of time, the second relay is activated by the first timer so as to short out the current-limiting resistor.
REFERENCES:
patent: 4328459 (1982-05-01), McLeod, Jr.
patent: 4504898 (1985-03-01), Pilukaitis et al.
patent: 4678984 (1987-07-01), Henze
patent: 5619127 (1997-04-01), Warizaya
patent: 5715154 (1998-02-01), Rault
Ferguson Bruce Robert
Ishida Roy Isam
Ninh Loi Quang
Jardieu Derek J.
Miller Jerry A.
Siegel Jaime A.
Sony Corporation
Sony Trans Com Inc.
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