Variable wattage control system
First Claim
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1. A control system that limits the wattage provided to a heat-producing element to a value less than that produced at full line voltage, the system comprising:
- at least one heat-producing element;
a power controller operatively associated with the heat-producing element;
a temperature controller operably associated with the power controller and generating a signal representing a percentage power output required to reach a set point temperature based on a comparison between a temperature reading and the set point temperature; and
a power limiting function that limits the wattage provided to the heat-producing element to multiple wattage values less than that produced at a full line voltage through the use of a scaling function when the control system is operating at full line voltage, the scaling function being a ratio between a desired wattage and the wattage at full line voltage,wherein the power controller provides a scaled power output by multiplying the percentage power output by the scaling function.
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Abstract
A control system and methods are provided that limit power provided to a power receiving device to a value less that that produced at full line voltage. The system includes at least one power receiving device and a power controller operatively associated with the power receiving device, the power controller comprising a power limiting function that limits the power provided to the power receiving device to a value less than that produced at a full line voltage through the use of a scaling function.
50 Citations
15 Claims
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1. A control system that limits the wattage provided to a heat-producing element to a value less than that produced at full line voltage, the system comprising:
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at least one heat-producing element; a power controller operatively associated with the heat-producing element; a temperature controller operably associated with the power controller and generating a signal representing a percentage power output required to reach a set point temperature based on a comparison between a temperature reading and the set point temperature; and a power limiting function that limits the wattage provided to the heat-producing element to multiple wattage values less than that produced at a full line voltage through the use of a scaling function when the control system is operating at full line voltage, the scaling function being a ratio between a desired wattage and the wattage at full line voltage, wherein the power controller provides a scaled power output by multiplying the percentage power output by the scaling function. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control system that limits power provided to a power receiving device to a value less that that produced at full line voltage, the system comprising:
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at least one power receiving device; a power controller operatively associated with the power receiving device, the power controller comprising a power limiting function that limits the power provided to the power receiving device to a value less than that produced at a full line voltage through the use of a scaling function when the control system is operating at full line voltage, the scaling function being a ratio between a desired power and the power at full line voltage; and a temperature controller operably associated with the power controller and generating a signal representing a percentage power output required to reach a set point temperature based on a comparison between a temperature reading and the set point temperature, wherein the power controller provides a scaled power output by multiplying the percentage power output by the scaling function. - View Dependent Claims (9, 10, 11)
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12. A control system that limits power provided to a power receiving device to a value less that that produced at full line voltage, the system comprising:
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at least one power receiving device; a power controller operatively associated with the power receiving device; a temperature controller operably associated with the power controller and generating a signal representing a percentage power output required to reach a set point temperature based on a comparison between a temperature reading and the set point temperature; and a module operatively associated with the power controller, the module comprising a power limiting function that limits the power provided to the power receiving device to a value less than that produced at a full line voltage through the use of a scaling function when the control system is operating at full line voltage, the scaling function being a ratio between a desired power and the power at full line voltage, wherein the power controller provides a scaled power output by multiplying the percentage power output by the scaling function. - View Dependent Claims (13, 14, 15)
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Specification
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Current AssigneeWatlow Electric Manufacturing Company
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Original AssigneeWatlow Electric Manufacturing Company
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InventorsFennewald, Kenneth J., Steinhauser, Louis P.
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Primary Examiner(s)KASENGE, CHARLES R
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Application NumberUS11/773,910Publication NumberTime in Patent Office2,112 DaysField of Search700/275, 700/276, 700/278, 700/286, 700/287, 700/291, 700/295, 700/297, 700/299, 700/300, 219/494, 219/497, 219/501, 219/504, 236/68.C, 236/68.R, 374/109US Class Current700/278CPC Class CodesG05D 23/1917 using digital means
