Power supply device preventing inrush current

Details Power supply device preventing inrush current Power supply device preventing inrush current

2005-08-23

2005-08-23

Riley, Shawn (Department: 2838)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

C361S187000

Reexamination Certificate

active

06934141

ABSTRACT:
A power supply device3including: a current source31for supplying current to a load circuit4which operates on the supplied current, and a power switch unit32between the current source31and the load circuit4to control passage of current, wherein: the power switch unit32includes a switching element323connected in parallel with the open-close element321, a power supply controller33including an open-close element controller31which controls operation of the open-close element321and a switching element controller332which controls operation of the switching element323, and a voltage detector34which detects terminal voltage of the load circuit4; and the power switch unit32turns on the switching element before supplying current to the load circuit and closes the open-close element when the terminal voltage of the load circuit becomes almost equal to supply voltage.

REFERENCES:
patent: 4967100 (1990-10-01), Okutsu et al.
patent: 5926010 (1999-07-01), Hosokawa et al.
patent: 6631065 (2003-10-01), Sugiyama et al.
patent: 6-231664 (1994-08-01), None
patent: 10-243555 (1998-09-01), None
patent: 2000-253570 (2000-09-01), None
patent: 2001-282059 (2001-10-01), None

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