Single phase redundant power supply systems for reducing phase current imbalances
First Claim
1. A system comprising:
- a first AC/DC power supply having an input coupled to a first phase voltage in a polyphase power distribution system, and an output coupled to a load for supplying an amount of DC power to the load;
a second AC/DC power supply having an input for coupling to a second phase voltage in the polyphase power distribution system, and an output coupled to the load for supplying an amount of DC power to the load; and
a controller for controlling one of the first AC/DC power supply and the second AC/DC power supply;
wherein the output of the first AC/DC power supply is coupled in parallel with the output of the second AC/DC power supply; and
wherein the controller is configured to reduce phase current imbalances in the polyphase power distribution system by adjusting the amount of DC power supplied to the load by the first AC/DC power supply and the amount of DC power supplied to the load by the second AC/DC power supply so the amount of DC power supplied to the load by the first AC/DC power supply is different than the amount of DC power supplied to the load by the second AC/DC power supply when the number of power supplies per phase of the polyphase power distribution system is the same.
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Accused Products
Abstract
A single phase redundant power supply system may include a first power supply having an input coupled to a first phase voltage in a polyphase power distribution system and an output coupled to a load for supplying an amount of DC power to the load, and a second power supply having an input for coupling to a second phase voltage in the polyphase power distribution system and an output coupled to the load for supplying an amount of DC power to the load. At least the first power supply is configured to reduce phase current imbalances in the polyphase power distribution system by adjusting the amount of DC power supplied to the load by the first power supply and the amount of DC power supplied to the load by the second power supply.
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Citations
32 Claims
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1. A system comprising:
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a first AC/DC power supply having an input coupled to a first phase voltage in a polyphase power distribution system, and an output coupled to a load for supplying an amount of DC power to the load; a second AC/DC power supply having an input for coupling to a second phase voltage in the polyphase power distribution system, and an output coupled to the load for supplying an amount of DC power to the load; and a controller for controlling one of the first AC/DC power supply and the second AC/DC power supply; wherein the output of the first AC/DC power supply is coupled in parallel with the output of the second AC/DC power supply; and wherein the controller is configured to reduce phase current imbalances in the polyphase power distribution system by adjusting the amount of DC power supplied to the load by the first AC/DC power supply and the amount of DC power supplied to the load by the second AC/DC power supply so the amount of DC power supplied to the load by the first AC/DC power supply is different than the amount of DC power supplied to the load by the second AC/DC power supply when the number of power supplies per phase of the polyphase power distribution system is the same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 32)
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24. A system comprising:
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a first plurality of AC/DC power supplies fed by a first phase voltage in a three phase power distribution system; a second plurality of AC/DC power supplies fed by a second phase voltage in the three phase power distribution system; a third plurality of AC/DC power supplies fed by a third phase voltage in the three phase power distribution system; each power supply having an output coupled in parallel with at least one other power supply fed by a different phase voltage; and a controller configured to generate control signals for adjusting a DC output of one or more of the power supplies to reduce phase current imbalances in the three phase power distribution system so a DC output of at least one power supply of the power supplies is different than a DC output of at least another power supply of the power supplies when the number of power supplies per phase of the three phase power distribution system is the same. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification