Condition monitoring
First Claim
1. A method of operating an electrical machine, wherein the operation of the machine is modelled by an electromagnetic finite element analysis technique prior to operation, the analysis including an analysis based on model parameters corresponding with at least one fault condition, so that at least one effect of the fault condition is predicted, and in which operation of the machine is monitored during use, by comparison of live measurements with the results of the finite element analysis, thereby allowing the occurrence of the fault condition to be diagnosed.
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Abstract
Condition monitoring of an electrical machine is achieved by using electromagnetic finite element analysis to analyse the machine based on model parameters corresponding with at least one fault condition. This allows the effect of the fault condition to be predicted. Metrology is used to recover live measurements for comparison with the predictions from the electro-magnetic finite element analysis to identify any fault signatures within the live measurements, in principle allowing those faults to be detected or diagnosed before they become catastrophic.
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Citations
18 Claims
- 1. A method of operating an electrical machine, wherein the operation of the machine is modelled by an electromagnetic finite element analysis technique prior to operation, the analysis including an analysis based on model parameters corresponding with at least one fault condition, so that at least one effect of the fault condition is predicted, and in which operation of the machine is monitored during use, by comparison of live measurements with the results of the finite element analysis, thereby allowing the occurrence of the fault condition to be diagnosed.
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2. A method of predicting condition during operation of an electrical machine, wherein the operation of the machine is modelled by an electromagnetic finite element analysis technique including an analysis based on model parameters corresponding with at least one fault condition so that at least one effect of the fault condition is predicted.
- 6. A machine condition monitoring means operable to monitor the condition of an electrical machine and including sensor means for recovering live measurements, the monitoring means being further operable to compare live measurements with the results of an electro-magnetic finite element analysis, the finite element analysis serving to model the operation of the machine and including an analysis based on model parameters corresponding with at least one fault condition, so that at least one effect of the fault condition is predicted by the model.
Specification