Insulation tester for squirrel cage rotors

Details Insulation tester for squirrel cage rotors Insulation tester for squirrel cage rotors

1999-02-17

2000-12-19

Metjahic, Safet

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324772, G01R 3112

Patent

active

061631574

ABSTRACT:
A method and apparatus are provided for measuring a quality of insulation surrounding rotor bars of a rotor of a squirrel cage motor. The method includes the steps of applying an alternating magnetic flux to opposing ends of the rotor measuring a power level absorbed by the rotor as a result of the applied alternating magnetic flux. The method further includes the step of using the measured power level as a relative measure of the quality of the insulation of the rotor bars.

REFERENCES:
patent: 4097794 (1978-06-01), Burrus
patent: 5134378 (1992-07-01), Twerdochild
patent: 5468066 (1995-11-01), Ito et al.
patent: 5712572 (1998-01-01), Tamechika et al.

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