UNINTERRUPTIBLE POWER SUPPLY SYSTEMS USING ELECTROHYDRAULIC ENERGY STORAGE
First Claim
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1. A power supply system comprising:
- an inverter configured to be coupled to a load;
an energy storage device coupled to a DC input of the inverter;
an electrohydraulic energy storage system configured to be coupled to the load and comprising a hydraulic accumulator, a generator, and a hydraulic motor mechanically coupling the generator and the hydraulic accumulator; and
a control circuit configured to control the electrohydraulic energy storage system responsive to a state of an AC power source coupled to the load.
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Abstract
A power supply system includes an inverter configured to be coupled to a load and an energy storage device, such as one or more capacitors, coupled to a DC input of the inverter. The power supply system further includes an electrohydraulic energy storage system configured to be coupled to the load and including a hydraulic accumulator, a generator, and a hydraulic motor mechanically coupling the generator and the hydraulic accumulator, along with a control circuit configured to control the electrohydraulic energy storage system responsive to a state of an AC power source coupled to the load.
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Citations
23 Claims
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1. A power supply system comprising:
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an inverter configured to be coupled to a load; an energy storage device coupled to a DC input of the inverter; an electrohydraulic energy storage system configured to be coupled to the load and comprising a hydraulic accumulator, a generator, and a hydraulic motor mechanically coupling the generator and the hydraulic accumulator; and a control circuit configured to control the electrohydraulic energy storage system responsive to a state of an AC power source coupled to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus:
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a generator configured to be coupled to a power input of an uninterruptible power supply (UPS); a hydraulic motor configured to drive the generator; a hydraulic accumulator; a valve coupling the hydraulic accumulator to the hydraulic motor; and a control circuit configured to control the valve. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of operating a UPS, the method comprising:
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providing energy to the load from an AC power source via the UPS; and providing energy to the load from a hydraulic accumulator via the UPS. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification