Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1997-10-27
2000-03-28
Do, Diep N.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324772, 361 48, G01R 3106, G01R 3134
Patent
active
060436646
ABSTRACT:
A method for turn fault detection in a multi-phase alternating current machine includes obtaining instantaneous line-to-neutral voltages from each phase of the machine, calculating the sum of the line-to-neutral voltages, and using the sum to determine whether a turn fault exists. The line-to-neutral voltages can be filtered to reduce harmonics. In one embodiment, deviations in a time-averaged function of the sum are examined. The time-averaged function can be exponentially weighted. Each of the line-to-neutral voltages can be calibrated to remove inherent machine phase impedance imbalance prior to calculating the sum of the line-to-neutral voltages.
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Cash Marcus Alex
Habetler Thomas Gerard
Kliman Gerald Burt
Agosti Ann M.
Breedlove Jill M.
Do Diep N.
General Electric Company
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