Method and apparatus for testing the magnetic properties of roto

Details Method and apparatus for testing the magnetic properties of roto Method and apparatus for testing the magnetic properties of roto

1976-11-23

1979-05-22

Blum, Theodore M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

G01R 1900

Patent

active

041561880

ABSTRACT:
A method and apparatus test the characteristics of rotors for hysteresis motors. A rotor to be tested is placed in predetermined spaced relation adjacent a testing stator having a stator winding. Predetermined voltage at predetermined frequency is applied to the testing stator winding while the rotor is maintained at standstill. Preferably, such voltage and frequency are the rated voltage and frequency of the motor into which it is intended that the rotor being tested will be assembled. The current thereby produced in the stator winding is measured, and the measured current is compared with a predetermined reference. The reference is preferably the current measured in the testing stator winding under the same conditions using a reference rotor that has been tested in a running motor.

REFERENCES:
patent: 1479284 (1924-01-01), Cullin
patent: 2217843 (1940-10-01), Langer
patent: 2504395 (1958-04-01), Cross

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