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

Claim 24:
25. A non-transitory computer readable storage medium having stored thereon instructions for instructing a processing unit of a system to execute a method of estimating an additional operating expenditure due to one or more mechanical anomalies in an electrical machine, said 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 detected until an instance when an overall vibration velocity of the electrical machine reaches a defined unacceptable range.