Apparatus for measuring motor rotation position and speed

Details Apparatus for measuring motor rotation position and speed Apparatus for measuring motor rotation position and speed

1987-02-10

1988-11-29

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including motor current or voltage sensor

73518, 324158MG, 324160, G01P 346

Patent

active

047884975

ABSTRACT:
An apparatus for detecting the speed and position of a rotating shaft of an electrical motor. A commutator is provided having three or more poles. First and second brushes are provided in sliding contact with the commutator for supplying electrical power to the poles of the commutator. At least one of the poles is in electrical communication with the shaft. Rotation detection means measure the electrical potential difference between the shaft and ground and generate a rotation information signal in response to the changes in the electrical potential difference as the shaft rotates.

REFERENCES:
patent: 3675126 (1972-07-01), Chilton
patent: 4684858 (1987-08-01), Ma et al.

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