Uninterruptible power supply system and method
First Claim
1. A system for providing power to a load, the system comprising:
- a first input to receive AC power from a first AC power source;
a second input to receive AC power from a second AC power source;
a third input to receive DC power from a first DC power source;
an output that provides output AC power to the load; and
converter circuitry, coupled to the first, second and third inputs and the output, adapted to provide the output AC power derived from at least one of the first AC power source, the second AC power source and the first DC power source.
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Abstract
Methods and apparatus for delivering uninterruptible power to loads are provided. One aspect on the invention is directed to a system for providing power to a load. The system includes a first input to receive AC power from a first AC power source, a second input to receive AC power from a second AC power source, a third input to receive DC power from a first DC power source, an output that provides output AC power to the load, and converter circuitry, coupled to the first, second and third inputs, adapted to provide the output power derived from at least one of the first AC power source, the second AC power source and the first DC power source.
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Citations
42 Claims
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1. A system for providing power to a load, the system comprising:
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a first input to receive AC power from a first AC power source;
a second input to receive AC power from a second AC power source;
a third input to receive DC power from a first DC power source;
an output that provides output AC power to the load; and
converter circuitry, coupled to the first, second and third inputs and the output, adapted to provide the output AC power derived from at least one of the first AC power source, the second AC power source and the first DC power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for providing power to a load, the system comprising:
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a first input to receive AC power from a first AC power source;
a second input to receive AC power from a second AC power source;
a third input to receive DC power from a first DC power source;
an output that provides output AC power to the load; and
converter means, coupled to the first, second and third inputs, for providing output power derived from at least one of the first AC power source, the second AC power source and the first DC power source. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method of providing power to a load using an uninterruptible power supply (UPS) having a first input that can be selectively coupled to a first AC source, a second AC source, and a first DC source;
- the method comprising;
coupling the first input of the UPS to the first AC source and providing output power to a load based on AC power from the first AC source;
detecting a loss of the first AC source;
coupling the first input of the UPS to the first DC source and providing output power from the UPS based on DC power from the first DC source; and
transitioning a draw of input current at the first input from the first DC source to the second AC source by alternately coupling the first DC source and the second AC source to the first input of the UPS. - View Dependent Claims (40, 41, 42)
- the method comprising;
Specification