Power-supply device

Details Power-supply device Power-supply device

2007-06-19

2007-06-19

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Load current control

C307S087000, C307S103000, C307S105000

Reexamination Certificate

active

10939479

ABSTRACT:
A power-supply device suppresses high harmonic waves, controls the flow of AC power, and minimizes adverse effects on a load that might otherwise be caused by a large surge of current into the load during the startup or stopping of the power-supply device. The power supply device includes a voltage supply unit2disposed in series between input and output terminals. This voltage supply unit functions to gradually lower the output-voltage level from a state of canceling the voltage across input terminals of the power supply device at the time of starting up the power-supply device, so that a gradual rise in the output voltage from the power-supply device is achieved. When the power-supply device is stopped, a gradual lowering of the output voltage from the power-supply device is obtained by gradually increasing the output voltage of the voltage supply unit so as to cancel the input voltage.

REFERENCES:
patent: 5659463 (1997-08-01), Lee
patent: 6522119 (2003-02-01), Hernandez
patent: 62-203560 (1987-09-01), None
patent: 2000-287447 (2000-10-01), None
patent: 2001-008462 (2001-01-01), None
patent: 2001-128390 (2001-05-01), None
patent: 2002-325465 (2002-11-01), None
patent: 2003-079161 (2003-03-01), None

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