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. 09, 2021
Filed:
Jul. 12, 2019
Minebea Mitsumi Inc., Nagano, JP;
Xiao Zhou, Kitasaku-gun, JP;
Hiroyuki Kaidu, Kakegawa, JP;
Masato Aoki, Iwata, JP;
Mitsunari Terada, Mito, JP;
MINEBEA MITSUMI INC., Nagano, JP;
Abstract
A motor driving control device has a motor driving unit configured to selectively energize coils with a plurality of phases of a motor, a control circuit unit configured to control an operation of the motor driving unit by outputting a driving control signal to the motor driving unit, and a position detector configured to output a position signal which corresponds to any one phase of the plurality of phases and a phase of which changes depending on a position of a rotor of the motor. the control circuit unit detects a transition of values of a back electromotive force induced in the one phase in a detection period corresponding to a change timing of the position signal when beginning to start up the motor, and determines a rotational state of the motor including a rotational direction of the motor based on a detection result of the transition of the values of the back electromotive force.