Patent ID: 11959978
Assignee: NATIONAL UNIVERSITY OF SINGAPORE
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 11:
12. A method of estimating an additional operating expenditure due to one or more mechanical anomalies in an electrical machine, the method comprising,
acquiring a set of online signals from the electrical machine over a period, said set of signals comprising at least one vibration signal, at least one magnetic flux signal and at least one current signal;
extracting an online anomaly indicator value from the set of online signals;
comparing the online anomaly indicator value with a baseline anomaly indicator value of a corresponding loading condition;
determining presence of mechanical anomaly when the online anomaly indicator value deviates from the baseline anomaly indicator value by a threshold; and
computing the additional operating expenditure over a time frame, said time frame starting from an instance when the mechanical anomaly is determined until an instance when an overall vibration velocity of the electrical machine is projected to reach a defined unacceptable range.