Patents by Inventor Subash Chandar ATHIKESSAVAN

Subash Chandar ATHIKESSAVAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of detecting a rotor bar fault and a method of estimating an additional operating expenditure due to one or more mechanical anomalies in an electrical machine
    Patent number: 11959978
    Abstract: A method of detecting a rotor bar fault of an electrical machine, said method comprising, acquiring a set of online signals from the electrical machine over a period, said set of online signals comprising at least one vibration signal, and a summed signal of magnetic flux signals, each magnetic flux signal obtained from a respective flux sensor positioned on an external surface of the electrical machine; 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; and determining presence of the broken or cracked rotor when the online anomaly indicator value deviates from the baseline anomaly indicator value by a threshold.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: April 16, 2024
    Assignees: Sembcorp Industries Ltd, National University of Singapore
    Inventors: Subash Chandar Athikessavan, Sanjib Kumar Panda, Shiva Shankaranarayanan Muthuraj
  • Method and a system of detecting winding fault under online operation of an electrical machine
    Patent number: 11500037
    Abstract: A method and a system of detecting winding fault during online operation of an electrical machine, said method comprising, acquiring a set of signals from the machine over a period, said set of signals comprising two or more magnetic flux signals, each flux signal obtained from a respective flux sensor positioned on the external surface of the machine; extracting an internal winding fault indicator from the set of signals; comparing the internal winding fault indicator with a baseline indicator; and determining the internal winding fault when the internal winding fault indicator deviates from the baseline indicator by a threshold.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: November 15, 2022
    Assignees: Sembcorp Industries Ltd, National University of Singapore
    Inventors: Subash Chandar Athikessavan, Shiva Shankaranarayanan Muthuraj, Sanjib Kumar Panda, Elango Jeyasankar, Sai Srinivas Manohar
  • A METHOD OF DETECTING A ROTOR BAR FAULT AND A METHOD OF ESTIMATING AN ADDITIONAL OPERATING EXPENDITURE DUE TO ONE OR MORE MECHANICAL ANOMALIES IN AN ELECTRICAL MACHINE
    Publication number: 20220276307
    Abstract: A method of detecting a rotor bar fault of an electrical machine, said method comprising, acquiring a set of online signals from the electrical machine over a period, said set of online signals comprising at least one vibration signal, and a summed signal of magnetic flux signals, each magnetic flux signal obtained from a respective flux sensor positioned on an external surface of the electrical machine; 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; and determining presence of the broken or cracked rotor when the online anomaly indicator value deviates from the baseline anomaly indicator value by a threshold.
    Type: Application
    Filed: August 4, 2020
    Publication date: September 1, 2022
    Inventors: Subash Chandar ATHIKESSAVAN, Sanjib Kumar PANDA, Shiva SHANKARANARAYANAN MUTHURAJ
  • A METHOD AND A SYSTEM OF DETECTING WINDING FAULT UNDER ONLINE OPERATION OF AN ELECTRICAL MACHINE
    Publication number: 20220155386
    Abstract: A method and a system of detecting winding fault during online operation of an electrical machine, said method comprising, acquiring a set of signals from the machine over a period, said set of signals comprising two or more magnetic flux signals, each flux signal obtained from a respective flux sensor positioned on the external surface of the machine; extracting an internal winding fault indicator from the set of signals; comparing the internal winding fault indicator with a baseline indicator; and determining the internal winding fault when the internal winding fault indicator deviates from the baseline indicator by a threshold.
    Type: Application
    Filed: August 5, 2019
    Publication date: May 19, 2022
    Inventors: Subash Chandar ATHIKESSAVAN, Shiva Shankaranarayanan MUTHURAJ, Sanjib Kumar PANDA, Elango JEYASANKAR, Sai Srinivas MANOHAR
  • FAULT DETECTION AND DIAGNOSIS IN AN INDUCTION MOTOR
    Publication number: 20160266208
    Abstract: A method of detecting rotor and/or stator side faults in an induction motor. Signals indicative of three-phase stator currents of the induction motor are acquired (10) and converted (16) into three-phase current phasors. The three-phase current phasors are combined (16) to obtain a quantity having a DC component and an AC component.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 15, 2016
    Applicant: ROLLS-ROYCE plc
    Inventors: Subash Chandar ATHIKESSAVAN, Sivakumar NADARAJAN, Amit Kumar GUPTA, Sanjib Kumar PANDA, Chandana Jayampathi GAJANAYAKE