Uninterruptible power supply
First Claim
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1. An uninterruptible power supply (UPS) system comprising:
- an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source;
a DC power source;
an output circuit including a power output;
a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit;
a processor coupled and configured to receive an input signal that indicates a single-phase AC mode or a multi-phase AC mode and provide an output signal that affects operation of the UPS depending upon which of the single-phase AC mode and the multi-phase AC mode is indicated; and
a phase imbalance monitor coupled to the processor and to at least two AC input lines of the AC power input for receiving at least two corresponding voltage signals from the multi-phase AC power source, the imbalance monitor configured to provide an imbalance indication of imbalance of the at least two corresponding voltage signals,wherein the processor is configured to determine from the imbalance indication whether multi-phase operation of the UPS is applicable.
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Abstract
An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an output circuit including a power output, a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit, and a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated.
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Citations
34 Claims
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1. An uninterruptible power supply (UPS) system comprising:
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an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source; a DC power source; an output circuit including a power output; a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit; a processor coupled and configured to receive an input signal that indicates a single-phase AC mode or a multi-phase AC mode and provide an output signal that affects operation of the UPS depending upon which of the single-phase AC mode and the multi-phase AC mode is indicated; and a phase imbalance monitor coupled to the processor and to at least two AC input lines of the AC power input for receiving at least two corresponding voltage signals from the multi-phase AC power source, the imbalance monitor configured to provide an imbalance indication of imbalance of the at least two corresponding voltage signals, wherein the processor is configured to determine from the imbalance indication whether multi-phase operation of the UPS is applicable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
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11. A method of supplying power to an electrical load with a UPS, the method comprising acts of:
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configuring an AC input of an uninterruptible power supply to receive AC power from either of a single-phase AC power source or a multi-phase AC power source; coupling, in a first mode of operation, the AC input to output circuitry of the uninterruptible power supply; coupling, in a second mode of operation, a DC input to the output circuitry; providing a first signal indicative of whether the UPS should operate in a single-phase AC mode or a multi-phase AC mode; generating a second signal, in response to the first signal, to adjust an operation of the UPS depending upon whether the single-phase operation or the multi-phase operation is indicated; detecting a first voltage signal from a first phase of the AC input; detecting a second voltage signal from a second phase of the AC input; determining an imbalance between the first voltage signal and the second voltage signal; generating an imbalance indication; and determining, from the imbalance indication, whether the multiphase mode of the uninterruptible power supply is applicable. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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21. An uninterruptible power supply (UPS) system comprising:
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an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source; a DC power source; an output circuit including a power output; a controllable switch configured to selectively couple at least one of the AC power input and the DC power source to the output circuit; a processor coupled and configured to affect operation of the output circuit depending upon which of single-phase and multi-phase operation of the UPS is indicated; and a phase imbalance monitor coupled to the processor and to at least two AC input lines of the AC power input for receiving at least two corresponding voltage signals from the multi-phase AC power source, the imbalance monitor configured to provide an imbalance indication of imbalance of the at least two corresponding voltage signals, wherein the processor is configured to determine from the imbalance indication whether multi-phase operation of the UPS is applicable. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A method of supplying power to an electrical load, the method comprising acts of:
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configuring an AC input of an uninterruptible power supply to receive AC power from either of a single-phase AC power source or a multi-phase AC power source; coupling, in a first mode of operation, the AC input to output circuitry of the uninterruptible power supply; coupling, in a second mode of operation, a DC input to the output circuitry; adjusting an operation of the output circuitry in response to an indication of whether a single-phase operation or a multi-phase operation is selected; detecting a first voltage signal from a first phase of the AC input; detecting a second voltage signal from a second phase of the AC input; determining an imbalance between the first voltage signal and the second voltage signal; generating an imbalance indication; and determining, from the imbalance indication, whether the multiphase mode of the uninterruptible power supply is applicable. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification