Self-tuning and compensating turn fault detector

Details Self-tuning and compensating turn fault detector Self-tuning and compensating turn fault detector

1996-04-01

1998-07-28

Karlsen, Ernest F.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324545, 364576, G01R 3134

Patent

active

057867089

ABSTRACT:
A method for detecting turn faults in an induction motor includes obtaining motor current and voltage waveforms and converting the motor current and voltage waveforms to digitized current and voltage waveforms. Fundamental phasors of the digitized current and voltage waveforms are extracted and, a symmetrical component transform is applied to the fundamental phasors to obtain symmetrical component current and voltage phasors including a negative sequence voltage phasor (V.sub.-) and negative sequence current phasor (I.sub.-). A fault injected negative sequence current (Ii.sub.-) is estimated according to the following equation:

REFERENCES:
patent: 4258302 (1981-03-01), Plunkett
patent: 4547726 (1985-10-01), Premerlani
patent: 4585985 (1986-04-01), Bose
patent: 4715000 (1987-12-01), Premerlani
patent: 5252915 (1993-10-01), Sedding et al.
patent: 5270640 (1993-12-01), Kohler et al.
patent: 5345158 (1994-09-01), Kliman et al.
patent: 5477163 (1995-12-01), Kliman
patent: 5514978 (1996-05-01), Koegl et al.
patent: 5629870 (1997-05-01), Farag et al.
"Alternatives for Assessing the Electrical Integrity of Induction Motors" by Kohler, et al, IEEE Transactions on Industry Applications, vol. 28, No. 5, Sep./Oct. 1992, pp. 1109-1117.
"Torque Equation in Arbitrary Reference-Frame Variables" by PC Krause, Analysis of Electric Machinery, 1986, p. 178. (month unavailable).
"An On-Line Method to Detect Incipient Failure of Turn Insulations in Random-Wound Motors" by Sottile, et al, Presented at the IEEE/PES Winter (month unavailable).

Affiliated with

Also associated with

Rating

Self-tuning and compensating turn fault detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-tuning and compensating turn fault detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-tuning and compensating turn fault detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-25781