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. 23, 2026
Filed:
Jul. 30, 2021
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Shinichi Akimoto, Fukuoka, JP;
Kazuhiko Hiramatsu, Fukuoka, JP;
KABUSHIKI KAISHA YASKAWA DENKI, Fukuoka, JP;
Abstract
A motor control device that can use a sensor input circuit that has a low response speed. The motor control device comprises a first magnetic pole position detection unit, a second magnetic pole position detection unit, and a control unit. The first magnetic pole position detection unit detects the pre-rotation position of a magnetic pole of a rotor based on detection results from a magnetic pole sensor. The second magnetic pole position detection unit detects the position of the magnetic pole of the rotor based on the current flowing in a plurality of drive windings that drive the rotor. The control unit performs control that makes the rotor start rotating based on detection results from the first magnetic pole position detection unit and control that makes the rotating rotor rotate based on detection results from the second magnetic pole position detection unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile