Method and apparatus for testing electric motor rotors

Details Method and apparatus for testing electric motor rotors Method and apparatus for testing electric motor rotors

1993-02-25

1995-04-04

Regan, Maura K.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324772, 318490, 73116, G01R 3102, G01L 326

Patent

active

054041082

ABSTRACT:
A testing apparatus for rotors of electric motors comprising a test fixture including a fixture shaft on which a rotor is temporarily attached to a known inertial load. A stator creates a rotating magnetic field to cause rotation of the rotor, and an encoder senses the amount of angular rotation of the rotor in short time intervals, which is recorded in a memory and later used to calculate torque. An index mark from the encoder indicates each complete revolution of the rotor and may be used to determine the location of a defective rotor segment by reference to a start point mark placed on the rotor prior to the test. An electronic control circuit initially applies a low value electric current to the stator to create a rotating magnetic field to cause the rotor to rotate at a slower than normal rate to improve the resolution of the torque measurement. After the rotor has accelerated to a predetermined value, the stator voltage may be increased. The amount of actual rotation of the rotor at multiple, known time intervals as the rotor accelerates to a predetermined speed is used to calculate actual torque.

REFERENCES:
patent: 3068385 (1962-12-01), Galbraith
patent: 3898560 (1975-08-01), Farreras et al.
patent: 4099163 (1978-07-01), Seeger et al.
patent: 4743848 (1988-05-01), Krimm et al.
patent: 4777446 (1988-10-01), Santandrea et al.
patent: 4991429 (1991-02-01), Stacey et al.
patent: 5030917 (1991-07-01), Kliman
patent: 5032826 (1991-07-01), Miller et al.
patent: 5059878 (1991-10-01), Bardelang et al.
patent: 5218860 (1993-06-01), Storar

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