Online diagnostic system for rotating electrical apparatus
First Claim
1. An online system for diagnosing operability of a rotating electrical power conversion apparatus, said system comprising:
- sensing means for sensing at least one operating condition of said rotating electrical power conversion apparatus and producing a corresponding at least one electrical variable;
data conversion means for converting the at least one electrical variable to a corresponding at least one value;
comparison means for comparing the at least one value to a corresponding at least one predetermined baseline value of said rotating electrical power conversion apparatus and producing a corresponding at least one comparison value; and
signalling means for outputting at least one signal related to a period of predicted operability of said rotating electrical power conversion apparatus whenever the at least one comparison value exceeds a corresponding at least one predetermined deadband value.
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Accused Products
Abstract
An online system for diagnosing operability of a rotating electrical apparatus includes sensors producing electrical variables corresponding to operating conditions of the apparatus, data converters for converting the electrical variables to digital values, a comparator for comparing the values to corresponding predetermined baseline values of the apparatus and producing a corresponding comparison value, and a signalling mechanism for outputting signals related to a period of predicted operability of the apparatus whenever the comparison value exceeds a corresponding predetermined deadband value. The operating conditions may be non-electrical operating conditions, such as a condition of a lubrication system or a bearing of the apparatus. Alternatively, the sensors may sense electrical insulation non-thermal parameters during operation of the apparatus, in order to produce signals related to the operability of an insulator of the apparatus. The system may have a local processor for performing the comparisons and signaling. Alternatively, the system may include an intermediate data storage and communication mechanism for storing and communicating the sensed values to a remote processor. The processor may also trend the values with respect to time and determine a derivative of a sensed value. The apparatus may be a motor operating in a hazardous environment, such as a reactor coolant pump (RCP) motor operating in a nuclear containment vessel.
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Citations
33 Claims
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1. An online system for diagnosing operability of a rotating electrical power conversion apparatus, said system comprising:
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sensing means for sensing at least one operating condition of said rotating electrical power conversion apparatus and producing a corresponding at least one electrical variable; data conversion means for converting the at least one electrical variable to a corresponding at least one value; comparison means for comparing the at least one value to a corresponding at least one predetermined baseline value of said rotating electrical power conversion apparatus and producing a corresponding at least one comparison value; and signalling means for outputting at least one signal related to a period of predicted operability of said rotating electrical power conversion apparatus whenever the at least one comparison value exceeds a corresponding at least one predetermined deadband value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An online system for diagnosing operability of a rotating electrical power conversion apparatus, said system comprising:
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sensing means for sensing at least one electrical insulation non-thermal parameter of said rotating electrical power conversion apparatus during operation thereof and producing a corresponding at least one electrical variable; data conversion means for converting the at least one electrical variable to a corresponding at least one value; comparison means for comparing the at least one value to a corresponding at least one predetermined baseline value of said rotating electrical power conversion apparatus and producing a corresponding at least one comparison value; and signalling means for outputting at least one signal related to a period of predicted operability of said rotating electrical power conversion apparatus whenever the at least one comparison value exceeds a corresponding at least one predetermined deadband value. - View Dependent Claims (21, 22, 23, 24)
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25. An online system for diagnosing operability of a motor operating in a hazardous environment, said system comprising:
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sensing means for sensing an operating condition of said motor and producing an electrical variable; data conversion means for converting the electrical variable to a sensed value; data processing means for processing the sensed value, said data processing means including comparison means for comparing the sensed value to a predetermined baseline value of said motor and producing a comparison value, and signalling means for outputting a signal related to a period of predicted operability of said motor in response to the comparison value. - View Dependent Claims (26, 27, 28)
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29. An online system for diagnosing operability of a reactor coolant pump (RCP) motor operating in a nuclear containment vessel, said system comprising:
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sensing means for sensing an operating condition of said RCP motor and producing a corresponding electrical variable; dam conversion means for converting the electrical variable to a corresponding value; comparison means for comparing the value to a predetermined baseline value of said RCP motor and producing a corresponding comparison value; and signalling means for outputting a signal related to a period of predicted operability of said RCP motor in response to the comparison value.
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30. A method for diagnosing operability of a rotating electrical power conversion apparatus, said method comprising:
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sensing an operating condition of said rotating electrical power conversion apparatus and producing a corresponding electrical variable; convening the electrical variable to a corresponding value; comparing the value to a predetermined baseline value of said rotating electrical power conversion apparatus and producing a corresponding comparison value; and outputting a signal related to a period of predicted operability of said rotating electrical power conversion apparatus in response to the comparison value.
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31. An online system for diagnosing operability of a motor with a bearing insulator operating in a hazardous environment, said system comprising:
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sensing means for sensing an electrical parameter of the bearing insulator during operation of said motor and producing a corresponding electrical variable; data conversion means for converting the electrical variable to a corresponding value; comparison means for comparing the value to a predetermined baseline value of said motor and producing a corresponding comparison value; and signalling means for outputting a signal related to a period of predicted operability of said motor in response to the comparison value.
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32. An online system for diagnosing operability of a reactor coolant pump (RCP) motor with a bearing insulator operating in a nuclear containment vessel, said system comprising:
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sensing means for sensing an electrical parameter of the bearing insulator during operation of said RCP motor and producing a corresponding electrical variable; data conversion means for converting the electrical variable to a corresponding value; comparison means for comparing the value to a predetermined baseline value of said RCP motor and producing a corresponding comparison value; and signalling means for outputting a signal related to a period of predicted operability of said RCP motor in response to the comparison value.
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33. A method for diagnosing operability of a rotating electrical power conversion apparatus having a bearing insulator, said method comprising:
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sensing an electrical parameter of the bearing insulator during operation of said rotating electrical power conversion apparatus and producing a corresponding electrical variable; converting the electrical variable to a corresponding value; comparing the value to a predetermined baseline value of said rotating electrical power conversion apparatus and producing a corresponding comparison value; and outputting a signal related to a period of predicted operability of said rotating electrical power conversion apparatus in response to the comparison value.
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Specification