The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 1997
Filed:
Apr. 13, 1995
Ken Mizuta, Miyagi-ken, JP;
Toshihiko Kawata, Sendai, JP;
Ken Shibazaki, Furukawa, JP;
Yukio Miura, Furukawa, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
An apparatus for detecting and controlling the rotational position of a motor without using a high-priced component and without requiring special software processing. The apparatus includes a motor rotation control section for selectively connecting a power source to the motor to rotate the motor into a predetermined position, a potentiometer mechanically linked to a shaft of the motor to read the absolute rotational position of the motor, an astable multivibrator for generating output pulses having a duty ratio corresponding to the position read by the potentiometer, and a control signal generation section for supplying a control signal corresponding to the duty ratio of the output pulses to the motor rotation control section to control the rotational position of the motor.