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:
Feb. 23, 2010
Filed:
Dec. 30, 2005
Shigeru Kamio, Nagoya, JP;
Kenichi Fujiki, Kariya, JP;
Sumiko Amamiya, Okazaki, JP;
Yasushi Kobiki, Toyota, JP;
Yuji Inoue, Nisshin, JP;
Shigeru Kamio, Nagoya, JP;
Kenichi Fujiki, Kariya, JP;
Sumiko Amamiya, Okazaki, JP;
Yasushi Kobiki, Toyota, JP;
Yuji Inoue, Nisshin, JP;
Denso Corporation, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentially switching the motor current supply phase without feeding back encoder count information. The position count is incremented or decremented every time the current supply phase is switched. When the position count has reached a target count, it is determined that the rotor has reached a target position, whereupon the open-loop control is finished.