Apparatus for measuring motor rotation position and speed
AssigneeKonica Corporation
InventorNobuo Katsumura
Life of this patent
Estimating the term…
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.
Claims6
An apparatus for detecting the speed and position of a rotating shaft of an electrical motor comprising:
- a commutator associated with said shaft having three or more poles;
- first and second brushes in sliding contact with said commutator for supplying electrical power to said poles of said commutator;
- at least one of said poles being in electrical communication with said shaft;
- and
- rotation detection means for measuring the electrical potential difference between said shaft and ground and generating a rotation information signal in response thereto.
Dependencies are inferred from the claim text.