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US 5,646,458 AGranted
Uninterruptible power system with a flywheel-driven source of standby power
AssigneeAtlas Energy Systems, Inc.
InventorsRichard N. Bowyer, Geoffrey West
Life of this patent
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AssigneeAtlas Energy Systems, Inc.
InventorsRichard N. Bowyer, Geoffrey West
Estimating the term…
An UPS (uninterruptible power system) includes an UPS power conditioning unit that provides conditioned AC power to a critical load. The UPS power conditioning unit includes a variable speed drive that operates in response to AC utility power or to a standby DC input by providing a motor drive signal. The UPS power conditioning unit further includes a motor-generator that operates in response to the motor drive output by providing the conditioned AC power to the critical load. In response to an outage in the utility AC power, standby DC power is provided by a standby DC power source that includes a variable speed drive and a flywheel motor-generator connected to the variable speed drive. Both the UPS power conditioning unit and the standby DC power source are initially operated in response to the utility AC power, the flywheel motor-generator storing kinetic energy in a rotating flywheel. When an outage occurs, the rotating flywheel continues to operate the flywheel motor-generator of the standby DC power source, causing the production of AC power which is rectified and provided as standby DC power to operate the variable speed drive of the UPS power conditioning unit until either the utility AC power outage is over or a standby emergency generator is brought on line.
An uninterruptible power system, including:
A standby DC power source for a system that provides power to a critical load, the system having an input for receiving standby DC power when a utility AC power signal is interrupted, the standby DC power source including:
A method of providing uninterruptible power in an UPS (uninterruptible power system) that includes a first variable speed drive responsive to utility AC power, or to standby DC power for producing a motor drive signal, and an AC motor generator responsive to the motor drive signal for producing conditioned AC power for a critical load, the method including the steps of:
Dependencies are inferred from the claim text.