Apparatus and method for monitoring and/or analysis of electrical machines during operation
First Claim
1. An apparatus for monitoring and/or analysis of electrical machines during operation, the electrical machine having at least one generator with a shaft and a drive element for driving the shaft, the apparatus comprising:
- a shaft grounding configured to ground the shaft at a first end of the generator;
a measurement unit disposed on the shaft at a second end of the generator and configured to measure at least one of a shaft voltage and a shaft current as a function of time so as to obtain at least one first signal; and
an analysis unit configured to receive the at least one first signal and to perform a combined and simultaneous analysis for at least two potential fault states in the electrical machine.
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Accused Products
Abstract
An apparatus and a method for monitoring and/or analysis of electrical machines during operation, wherein the electrical machine has at least one generator with a shaft and drive means for driving this shaft, wherein the shaft is grounded at the first end of the generator, and wherein a measurement unit for measurement of shaft voltage and/or shaft current as a function of time is provided on the shaft at the second end of the generator. An apparatus such as this allows the combined and simultaneous measurement of various fault states by supplying signals for the shaft voltage and/or the shaft current to an analysis unit, wherein the analysis unit allows combined and simultaneous analysis of at least two potential fault states of the electrical machine. Simultaneous cross-relationships between the individual measurement results of individual fault states may be provided so as to allow a clearer and more reliable diagnosis of critical states, not possible when individual phenomena are considered separately.
35 Citations
30 Claims
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1. An apparatus for monitoring and/or analysis of electrical machines during operation, the electrical machine having at least one generator with a shaft and a drive element for driving the shaft, the apparatus comprising:
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a shaft grounding configured to ground the shaft at a first end of the generator;
a measurement unit disposed on the shaft at a second end of the generator and configured to measure at least one of a shaft voltage and a shaft current as a function of time so as to obtain at least one first signal; and
an analysis unit configured to receive the at least one first signal and to perform a combined and simultaneous analysis for at least two potential fault states in the electrical machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for monitoring and/or analysis of electrical machines during operation, the electrical machine having at least one generator with a shaft and a drive element for driving the shaft, the method comprising:
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grounding the shaft at a first end of the generator;
measuring at least one of a shaft voltage and a shaft current as a function of time using a measurement unit disposed on the shaft at a second end of the generator;
providing at least one signal indicative of at least one of the shaft voltage and the shaft current to an analysis unit; and
performing a combined and simultaneous analysis for at least two potential fault states in the electrical machine using the analysis unit. - View Dependent Claims (30)
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Specification