Method of predicting condition during operation of an electrical machine
First Claim
1. A method of operating an electrical machine, wherein the operation of the machine is modeled by an electro-magnetic 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 by search coil means, by comparison of live measurements from said search coil means 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 electro-magnetic 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.
16 Citations
18 Claims
- 1. A method of operating an electrical machine, wherein the operation of the machine is modeled by an electro-magnetic 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 by search coil means, by comparison of live measurements from said search coil means 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 modeled by an electro-magnetic finite element analysis technique including an analysis based on model parameters corresponding with at least one fault condition wherein the machine is monitored by search coil means, the measurements of said search coil means being compared with the results of the finite element analysis in order to predict the at least one fault condition.
- 6. A machine condition monitoring means operable to monitor the condition of an electrical machine and including sensor means comprising search coils 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.
- 12. A machine condition monitoring means operable to monitor the condition of an electrical machine and including sensor means comprising search coils for recovering live measurements, the monitoring means being further operable to compare live measurements from said sensor means 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 wherein said machine being a transverse flux machine having a disc with a rim of alternating permanent magnets and pole pieces, and a ring of core pieces, operating with the rim and having an energizing coil arrangement associated therewith.
Specification