Uninterruptable power supply device for a motor

Details Uninterruptable power supply device for a motor Uninterruptable power supply device for a motor

1997-02-28

1998-09-29

Elms, Richard T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

H02J 700

Patent

active

058148981

ABSTRACT:
An uninterruptable power supply device for a motor is disclosed. The uninterruptable power supply device includes: a power storing device, connected to a utility AC power source, for storing an electrical charge; a DC/AC convertor, connected to the power storing device, for converting DC power outputted from the power storing device into AC power to be used by the motor; a first switch, connected to the utility AC power source, the DC/AC convertor, and the motor, for performing a switching operation in response to a status condition of the utility AC power source; a detecting/control circuit, connected to the motor, for detecting a loading status of the motor and outputting a control signal indicative of the loading status; and a second switch, connected to the detecting/control circuit, the power storing device, and the DC/AC convertor, for performing a switching operation in response to the control signal, wherein the second switch disconnects the power storing device from the DC/AC convertor if the control signal indicates that the motor is not loading the power storing device.

REFERENCES:
patent: 4506766 (1985-03-01), Watanabe
patent: 5612580 (1997-03-01), Janonis et al.

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