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:
Sep. 15, 2026
Filed:
Oct. 27, 2022
Minebea Mitsumi Inc., Nagano, JP;
Naoyuki Wada, Nagano, JP;
MINEBEA MITSUMI INC., Nagano, JP;
Abstract
To increase the stability of an operation when the driving of a stepping motor is started. A motor drive control device includes a control unit configured to generate a control signal (Sd) for controlling driving of a two-phase stepping motor, and a drive unit configured to drive coils of two phases of the two-phase stepping motor based on the control signal (Sd). The control unit has, as control modes, a first commutation control mode for commutating the coils according to a target energization time based on a preset commutation condition, and a second commutation control mode for commutating the coils based on a detection result of a zero crossing point of a back electromotive voltage of the coils, and the control unit generates the control signal (Sd) in the first commutation control mode at the start of activation of the two-phase stepping motor, and generates the control signal (Sd) in the second commutation control mode when the detection result of the zero crossing point satisfies a predetermined condition.