Testing limits of speed variations in motors

Details Testing limits of speed variations in motors Testing limits of speed variations in motors

1985-05-28

1986-12-16

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

340670, 318317, G01P 348

Patent

active

046299807

ABSTRACT:
Motor test circuit for supplying an error indication signal if the speed variations of a motor under test exceed predetermined limits. The circuit includes a frequency-to-voltage converter or other source of voltage proportional to the motor speed and a reference source derived from the converter's output signal so that the test results are independent from errors due to drift in the converter's parameters caused by time, temperature, or other effects.

REFERENCES:
patent: 3767972 (1973-10-01), Noddings et al.
patent: 3997869 (1976-12-01), Mayer
patent: 4218879 (1980-08-01), Hagrman et al.
patent: 4471735 (1984-09-01), Collonia
patent: 4473783 (1984-09-01), Vermesse

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