METHOD AND APPARATUS FOR PROVIDING UNINTERRUPTIBLE POWER
First Claim
1. An uninterruptible power supply comprising:
- a battery;
a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source;
a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation;
a first connection circuit to couple the first input to the boost circuit in the line mode of operation; and
a second connection circuit to couple the battery to the boost circuit in the backup mode of operation;
wherein the uninterruptible power supply is constructed and arranged to isolate the battery from the input neutral connection in the line mode of operation and wherein the uninterruptible power supply is configured to operate with an AC voltage source at the first input having a peak AC voltage that is less than the positive output DC voltage, and wherein the battery has a battery voltage that is less than the positive output DC voltage and greater than the peak AC voltage.
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Accused Products
Abstract
At least one aspect is directed to an uninterruptible power supply that includes a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation. The power supply also includes a first connection circuit to couple the first input to the boost circuit in the line mode of operation, and a second connection circuit to couple the second input to the boost circuit in the backup mode of operation, the second connection circuit being configured to isolate the second voltage source from the input neutral connection in the line mode of operation.
36 Citations
42 Claims
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1. An uninterruptible power supply comprising:
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a battery; a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source; a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation; a first connection circuit to couple the first input to the boost circuit in the line mode of operation; and a second connection circuit to couple the battery to the boost circuit in the backup mode of operation; wherein the uninterruptible power supply is constructed and arranged to isolate the battery from the input neutral connection in the line mode of operation and wherein the uninterruptible power supply is configured to operate with an AC voltage source at the first input having a peak AC voltage that is less than the positive output DC voltage, and wherein the battery has a battery voltage that is less than the positive output DC voltage and greater than the peak AC voltage. - View Dependent Claims (5, 6, 7, 10, 11, 12)
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- 2. (canceled)
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8-9. -9. (canceled)
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13-32. -32. (canceled)
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33. A power system comprising:
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a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source; a second voltage source; a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a first mode of operation and a second mode of operation; a first connection circuit to couple the first input to the boost circuit in the first mode of operation; and a second connection circuit to couple the second voltage source to the boost circuit in the second mode of operation; wherein the power supply is constructed and arranged to isolate the second voltage source from the input neutral connection in the first mode of operation and wherein the power supply is configured to operate with an AC voltage source at the first input having a peak AC voltage that is less than the positive output DC voltage, and wherein the second voltage source has an output voltage that is less than the positive output DC voltage and greater than the peak AC voltage. - View Dependent Claims (34, 35, 36, 37, 38)
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39. A method of providing power to a load, the method comprising:
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receiving input AC power at a line connection and a neutral connection from a first voltage source, the input AC power having a peak AC voltage; rectifying the input power to produce a first rectified voltage at a first node during a positive portion of an input voltage wave and a second rectified voltage at a second node during a negative portion of the input voltage wave; in a first mode of operation, producing a positive DC voltage with respect to the neutral connection from the first rectified voltage and a negative DC voltage with respect to the neutral connection from the second rectified voltage, wherein the peak AC voltage is less than the positive DC voltage; and coupling a second voltage source having a DC voltage to the first node and the second node using a connection circuit that is configured to isolate the second voltage source from the neutral connection in the first mode of operation, wherein coupling a second voltage source includes coupling a first isolation device between the second voltage source and the first node and coupling a second isolation device between the second voltage source and the second node, wherein the DC voltage of the second DC voltage source is less than the positive DC voltage and greater than the peak AC voltage. - View Dependent Claims (40, 41, 42)
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Specification