Method and apparatus for providing uninterruptible power
First Claim
1. An uninterruptible power supply for providing power to a load, the uninterruptible power supply comprising:
- a first input to receive input power from an input power source;
an output to provide output power;
a bypass input to receive bypass power from a bypass power source, wherein the bypass input is selectively coupled to the output to provide output power from the bypass power source;
an input power circuit coupled to the first input and having a DC output that provides DC power having a first DC voltage level;
a back-up power source coupled to the input power circuit to provide DC power at the DC output in a back-up mode of operation; and
an inverter circuit having an input coupled to the DC output of the input power circuit and an output coupled to the output of the uninterruptible power supply to provide the output power derived from at least one of the input power source and the back-up power source;
wherein the uninterruptible power supply is constructed and arranged in a bypass mode of operation to control the inverter circuit to convert AC power from the bypass power source at the output of the inverter circuit to DC power at the input of the inverter circuit.
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Accused Products
Abstract
Methods and apparatus for providing uninterruptible power are provided by aspects of the invention. One aspect is more particularly directed to an uninterruptible power supply for providing power to a load. The uninterruptible power supply includes a first input to receive input power from an input power source, an output to provide output power, a bypass input to receive bypass power from a bypass power source, wherein the bypass input is selectively coupled to the output to provide output power from the bypass power source, an input power circuit coupled to the first input and having a DC output that provides DC power having a first DC voltage level, a back-up power source coupled to the input power circuit to provide DC power at the DC output in a back-up mode of operation, and an inverter circuit having an output coupled to the DC output of the input power circuit and having an output coupled to the output of the uninterruptible power supply to provide the output power derived from at least one of the input power source and the back-up power source. The uninterruptible power supply is constructed and arranged in a bypass mode of operation to control the inverter circuit to convert AC power from the bypass power source at the output of the inverter circuit to DC power at the input of the inverter circuit.
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Citations
32 Claims
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1. An uninterruptible power supply for providing power to a load, the uninterruptible power supply comprising:
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a first input to receive input power from an input power source;
an output to provide output power;
a bypass input to receive bypass power from a bypass power source, wherein the bypass input is selectively coupled to the output to provide output power from the bypass power source;
an input power circuit coupled to the first input and having a DC output that provides DC power having a first DC voltage level;
a back-up power source coupled to the input power circuit to provide DC power at the DC output in a back-up mode of operation; and
an inverter circuit having an input coupled to the DC output of the input power circuit and an output coupled to the output of the uninterruptible power supply to provide the output power derived from at least one of the input power source and the back-up power source;
wherein the uninterruptible power supply is constructed and arranged in a bypass mode of operation to control the inverter circuit to convert AC power from the bypass power source at the output of the inverter circuit to DC power at the input of the inverter circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An uninterruptible power supply for providing power to a load, the uninterruptible power supply comprising:
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a first input to receive input power;
an output to provide output power;
a bypass input to receive bypass power, wherein the bypass input is selectively coupled to the output to provide output power from the bypass power;
an input power circuit coupled to the first input and having a DC output that provides DC power having a first DC voltage level;
a back-up power source coupled to the input power circuit to provide DC power at the DC output in a back-up mode of operation;
an inverter circuit having an input coupled to the DC output of the input power circuit and an output coupled to the output of the uninterruptible power supply to provide the output power derived from at least one of the input power and power from the back-up power source;
means for controlling the inverter circuit in a bypass mode of operation to convert AC power from the bypass power source at the output of the inverter circuit to DC power at the input of the inverter circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for providing uninterrupted power from a power supply having a first input, a bypass input and an output from which power is provided, the power supply further including a source of back-up power and an inverter that converts DC power to AC power for use at the output of the power supply, the method comprising:
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operating the power supply in a first mode of operation with power at the output being supplied from the inverter and derived from power at the first input;
operating in a bypass mode with power at the output being supplied from power at the bypass input; and
in the bypass mode, operating the inverter to provide DC power at an input of the inverter from AC power at an output of the inverter. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification