Spectral analysis of induction motor current to detect rotor fau

Details Spectral analysis of induction motor current to detect rotor fau Spectral analysis of induction motor current to detect rotor fau

1990-08-27

1991-09-17

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 77B, 324545, G01R 3102, G01R 2316

Patent

active

050498150

ABSTRACT:
Pursuant to detecting rotor faults in an induction motor by analysis of a frequency spectrum of the current drawn by the motor under test, wherein success of the fault analysis requires an accurate determination of the fundamental frequency of the motor current and the motor slip frequency, method and apparatus are disclosed for determining the fundamental and slip frequency values solely from analysis of the motor current spectra.

REFERENCES:
patent: 2640100 (1953-05-01), Packer et al.
patent: 4156846 (1979-05-01), Harrold et al.
patent: 4377784 (1983-03-01), Saito et al.
patent: 4678990 (1987-07-01), Bicknell et al.
patent: 4761703 (1988-08-01), Kliman et al.
patent: 4808932 (1989-02-01), Schulz, Jr. et al.
patent: 4853818 (1989-08-01), Emery et al.
patent: 4978909 (1990-12-01), Hendrix et al.

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