Uninterruptible power supply

Details Uninterruptible power supply Uninterruptible power supply

1994-07-18

1995-01-24

Atkinson, Charles E.

Excavating

307 64, G06F 1100, H03M 1300

Patent

active

053847920

ABSTRACT:
An uninterruptible power supply which is down-sized and lightened is provided. A utility line 1 is connected with a switch 8 and the switch 8 is connected with a rectifying circuit 2 and DC power from the rectifying circuit 2 inputs to a first inverter 3-1 and charges a battery 6 by a charger 7 connected with a node between the utility line 1 and the switch 8 and the DC power from the battery 6 is converted to AC power by a second inverter 3-2 to input to the rectifying circuit 2. When the utility line 1 is interrupted, AC power from the second inverter 3-2 is supplied to the rectifying circuit 2 to continuously supply power to a load 4. As a result, the number of cells in a battery may be reduced, the cost and man-day of the unit may be reduced, the reliability of the unit may be improved and the supply may be down-sized and lightened.

REFERENCES:
patent: 4313060 (1982-01-01), Fickenscher et al.
patent: 4673825 (1987-06-01), Raddi et al.
patent: 4707618 (1987-11-01), Hass
patent: 4719550 (1988-06-01), Powell et al.
patent: 4782241 (1988-11-01), Baker
patent: 4827150 (1989-05-01), Reynal
patent: 4868832 (1989-09-01), Marrington et al.
patent: 5045989 (1991-09-01), Higaki et al.

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