Compressor protection and grid fault detection device
First Claim
1. A method comprising:
- operating at least one component of an air conditioning system in a first state;
detecting an electrical grid fault in response to a comparison of (i) a first average of current drawn by the at least one component and (ii) a second average of the current drawn by the at least one component; and
in response to the detecting of the electrical grid fault,switching the at least one component from the first state to a second state, wherein the at least one component consumes less power in the second state than in the first state; and
switching the at least one component from the second state to the first state after a predetermined period of time following the detecting of the electrical grid fault.
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Accused Products
Abstract
A compressor monitoring system includes current and voltage monitors, current and voltage averaging modules, a control module, and a switch. The current monitor measures a current drawn by a motor of a compressor. The current averaging module generates first and second average current values based on the current measured by the current monitor. The voltage monitor measures a utility power voltage. The voltage averaging module generates first and second average voltage values based on the voltage measured by the voltage monitor. The control module selectively generates a fault signal when a first ratio is greater than a first predetermined threshold and a second ratio is less than a second predetermined threshold. The first ratio is based on the first and second average current values. The second ratio is based on the first and second average voltage values. The switch deactivates the motor when the fault signal is generated.
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Citations
20 Claims
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1. A method comprising:
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operating at least one component of an air conditioning system in a first state; detecting an electrical grid fault in response to a comparison of (i) a first average of current drawn by the at least one component and (ii) a second average of the current drawn by the at least one component; and in response to the detecting of the electrical grid fault, switching the at least one component from the first state to a second state, wherein the at least one component consumes less power in the second state than in the first state; and switching the at least one component from the second state to the first state after a predetermined period of time following the detecting of the electrical grid fault. - View Dependent Claims (11, 12, 13, 14, 15)
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2. A method comprising:
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operating at least one component of an air conditioning system in an ON state; detecting an electrical grid fault in response to a comparison of (i) a first average of current drawn by the at least one component and (ii) a second average of the current drawn by the at least one component; and in response to the detecting of the electrical grid fault, switching the at least one component from the ON state to an OFF state; and switching the at least one component from the OFF state to the ON state after a predetermined period of time following the detecting of the electrical grid fault. - View Dependent Claims (16, 17, 18, 19, 20)
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3. A method of operating a component of an air conditioning system, the method comprising:
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monitoring an electrical parameter of the component, wherein the electrical parameter is a current drawn by the component; determining an occurrence of an electrical grid fault based on a comparison of a first average of the current and a second average of the current; and in response to the occurrence of the electrical grid fault, actuating a switch to interrupt the current to the component; and a predetermined period of time after the current is interrupted, actuating the switch to re-supply the current to the component. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification