METHOD AND APPARATUS FOR PREDICTING LIFETIME OF A SOLENOID COIL
First Claim
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1. A method for estimating a remaining lifetime of a solenoid coil of a valve controller operating in a process control system, the method comprising:
- maintaining, by a processor, a record of a duration of activation of the solenoid coil;
determining, with the processor, an operating temperature of the solenoid coil; and
generating, with the processor, an estimate of the remaining lifetime of the solenoid coil based on the duration of activation of the solenoid coil and on the operating temperature of the solenoid coil.
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Abstract
In a method for estimating a remaining lifetime of a solenoid coil of a valve controller operating in a process control system, a record of a duration of activation of the solenoid coil is maintained during operation of the solenoid coil. An operating temperature of the solenoid coil is determined. An estimate of the remaining lifetime of the solenoid coil is generated based on the duration of activation of the solenoid coil and the operating temperature of the solenoid coil.
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20 Claims
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1. A method for estimating a remaining lifetime of a solenoid coil of a valve controller operating in a process control system, the method comprising:
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maintaining, by a processor, a record of a duration of activation of the solenoid coil; determining, with the processor, an operating temperature of the solenoid coil; and generating, with the processor, an estimate of the remaining lifetime of the solenoid coil based on the duration of activation of the solenoid coil and on the operating temperature of the solenoid coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 19, 20)
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11. A valve controller coupled to a control valve operating in a process control system, the valve position controller comprising:
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a solenoid valve having a solenoid coil; and an electronic module configured to; maintain a record of a duration of activation of the solenoid coil; determine an operating temperature of the solenoid coil; and generate an estimate of a remaining lifetime of the solenoid coil based on the duration of activation of the solenoid coil and the operating temperature of the solenoid coil. - View Dependent Claims (12)
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Specification