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. 22, 2019
Filed:
May. 07, 2018
Alps Alpine Co., Ltd., Tokyo, JP;
Ikuyasu Miyako, Miyagi, JP;
Wataru Kimura, Miyagi, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
When a rotation start position of a rotation shaftis a middle start position(i.e., when rotation of the rotation shaftis stopped in the middle and the rotation is restarted), target rotational speed (relative target rotational speed) is defined using a relative patternthat uses the middle start positionas a reference, without using an absolute patternthat is defined using a normal rotation start positionas a reference. Upon detecting that a condition that absolute target rotational speed corresponding to an angular position detected by a rotation sensoris greater than the relative target rotational speed is not satisfied, motor control is switched so that the absolute patternis used.