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:
Oct. 21, 2014
Filed:
Oct. 23, 2012
Tomohiko Kamatani, Hyogo, JP;
Haruyuki Suzuki, Kanagawa, JP;
Fumihiro Shimizu, Kanagawa, JP;
Katsuhisa Furuse, Hyogo, JP;
Tomohiko Kamatani, Hyogo, JP;
Haruyuki Suzuki, Kanagawa, JP;
Fumihiro Shimizu, Kanagawa, JP;
Katsuhisa Furuse, Hyogo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A motor drive controller to drive a motor, based on multiple sensors that generates multiple sensor signals corresponding to different positions of the rotor; including a first phase detector to compare a respective one of the multiple sensor signals with a paired sensor signal from the same sensor to detect phases of the rotor, and output a first phase information signal representing a first detected phase; a phase divider to divide the phases, detected by the first phase detector into multiple predetermined phase intervals; a signal selector to select one of the respective multiple sensor signals from the multiple sensors in the multiple predetermined phase interval; and a second phase detector to detect whether the signal selected by the signal selector reaches a predetermined threshold level corresponding to a predetermined phase of the rotor, and output a second phase information signal representing a second detected phase.