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:
Jun. 27, 2006
Filed:
Jul. 22, 2005
Yoshihiro Okumatsu, Kiryu, JP;
Yasuo Matsuda, Kiryu, JP;
Shoji Ohiwa, Kiryu, JP;
Japan Servo Co., Ltd., Tokyo, JP;
Abstract
A motor control system according to the present invention comprises a magnetic encoder including a magnetic drum fixed to an output shaft of a motor and a magnetic sensor provided against a periphery of the magnetic drum through a space, an angle calculating unit for calculating a rotational angle of the motor from an output of the magnetic encoder, an angle estimating unit for estimating the rotational angle, an error angle calculating unit for finding an error angle from an calculated angle calculated by the angle calculating unit and an estimated angle estimated by the angle estimating unit, an error-correction value calculating unit for calculating from the error angle an error-correction value that corresponds to the rotational angle, a correction calculating unit for calculating a correction angle or a correction speed from the calculated angle and the error-correction value, and a motor operation controlling unit for outputting to an inverter a voltage command value that corresponds to the correction angle or the correction speed.