Apparatus for detecting revolution counts of an electric motor o

Details Apparatus for detecting revolution counts of an electric motor o Apparatus for detecting revolution counts of an electric motor o

1991-10-21

1993-03-23

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including motor current or voltage sensor

318490, G01P 346, G01R 3102, H02H 304, H02K 1100

Patent

active

051967901

ABSTRACT:
A revolution counts detection apparatus comprises a detector for detecting the induced voltage of an electric motor, a capacitor for storing charges, and a charging means for charging the capacitor on the basis of the detected induced voltage. Further, a generator for generating a voltage corresponding to the revolution velocity of a revolving body can be used instead of the electric motor. Whereby, the revolution counts of the motor or the generator can be detected as a voltage across the capacitor.

REFERENCES:
patent: 2654860 (1953-10-01), Lewis

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