UNINTERRUPTIBLE COOLING SYSTEM AND APPARATUS
First Claim
1. A cooling system comprising a compressor motor and a compressor operated by the compressor motor and a fan motor and fan operated by the fan motor, the cooling system comprising:
- a first port configured for coupling with a primary AC power supply;
a second port configured for coupling with a DC secondary power supply, wherein the DC secondary power supply is a backup power source that allows the cooling system to operate when the AC primary power supply exceeds predetermined operating conditions;
a power circuit including a DC bus coupled to the first port and the second port via a boost input current shaping circuit, the power circuit configured to deliver power from the first port and the second port to the DC bus, the power circuit further including two pluralities of switches, the first plurality of switches configured to receive power from the DC bus and provide a first AC voltage to power the compressor motor, the second plurality of switches configured to receive power from the DC bus and provide a second AC voltage to power the fan motor.a DC/DC converter configured to galvanically isolate the DC secondary power supply at the second port from the primary AC power supply at the first port and convert the voltage at the second port to a level suitable for input to the boost input current shaping circuitat least one control circuit configured to control the first plurality of switches such that the voltage and frequency of the first AC voltage provided controls the speed of the compressor motor, the at least one control circuit further configured to control the second plurality of switches such that the voltage and frequency of the second AC voltage provided controls the speed of the fan motor, the at least one control circuit further configured to control power flow from the first port and power flow from the second port to the DC bus, the at least one control circuit further configured to control the boost input current shaping circuit to maintain input current proportional to input voltage and control the DC bus voltage.
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Accused Products
Abstract
A cooling system and power control apparatus provides an uninterruptible power supply. In one embodiment, the uninterruptible power supply provides power to an air conditioning system for cooling telecommunications equipment in the case of an AC power failure. Embodiments of the present invention include a first port configured for coupling with a primary power supply; a second port configured for coupling with a secondary power supply, wherein the secondary power supply is a backup power source that allows the cooling system to operate when the primary power supply exceeds predetermined operating conditions. A power circuit including a DC bus delivers power from the first port and the second port to a plurality of switches for controlling cooling equipment. A control circuit is configured to control power flow from the first port and power flow from the second port to the DC bus and the first plurality of switches.
21 Citations
20 Claims
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1. A cooling system comprising a compressor motor and a compressor operated by the compressor motor and a fan motor and fan operated by the fan motor, the cooling system comprising:
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a first port configured for coupling with a primary AC power supply; a second port configured for coupling with a DC secondary power supply, wherein the DC secondary power supply is a backup power source that allows the cooling system to operate when the AC primary power supply exceeds predetermined operating conditions; a power circuit including a DC bus coupled to the first port and the second port via a boost input current shaping circuit, the power circuit configured to deliver power from the first port and the second port to the DC bus, the power circuit further including two pluralities of switches, the first plurality of switches configured to receive power from the DC bus and provide a first AC voltage to power the compressor motor, the second plurality of switches configured to receive power from the DC bus and provide a second AC voltage to power the fan motor. a DC/DC converter configured to galvanically isolate the DC secondary power supply at the second port from the primary AC power supply at the first port and convert the voltage at the second port to a level suitable for input to the boost input current shaping circuit at least one control circuit configured to control the first plurality of switches such that the voltage and frequency of the first AC voltage provided controls the speed of the compressor motor, the at least one control circuit further configured to control the second plurality of switches such that the voltage and frequency of the second AC voltage provided controls the speed of the fan motor, the at least one control circuit further configured to control power flow from the first port and power flow from the second port to the DC bus, the at least one control circuit further configured to control the boost input current shaping circuit to maintain input current proportional to input voltage and control the DC bus voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A power control apparatus for delivering electrical power from a first power supply and a second power supply to an air conditioning system including a compressor and a fan, the power control apparatus comprising:
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a first input port to receive power from the first power supply; a second input port to receive power from the second power supply; a DC/DC converter to provide power from the second power supply while providing galvanic isolation of the second power supply from the first power supply and voltage transformation of the second power supply; a boost input current shaping circuit coupled to the first input port and the second input port, the boost input current shaping circuit having a DC bus; a plurality of switches coupled to the first port and the second port by the boost input current shaping circuit, the plurality of switches configured to operate one or more cooling system devices; and a control circuit configured to monitor power received from the first input, the control circuit further configured to monitor power received from the second input and selectively deliver power from either the first input or the second input based on predetermined operating conditions. - View Dependent Claims (17, 18, 19, 20)
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Specification