Title:
ステップモータ駆動装置
Document Type and Number:
Japanese Patent JP7126315
Kind Code:
B2
Abstract:
To reliably rotate a step motor while reducing power consumption, a step motor driving device includes a step motor (20) that includes a rotor (22), stator, coil (21), driver circuit (7) that outputs a measurement drive signal to the coil, phase detecting circuit (42) that detects a counter-electromotive current that is generated in the coil after the output of the measurement drive signal and determines whether a phase of the rotor is a desired phase based on the detected counter-electromotive current, and a control unit (43) that, if the phase is the desired phase, controls the step motor by a first driving method in which the drive circuit outputs a first drive signal for rotating the rotor by one step, and, if not, controls the step motor by a second driving method different from the first driving method so as to restrict the rotation of the rotor.
Inventors:
Takyo Yu
Application Number:
JP2018126055A
Publication Date:
August 26, 2022
Filing Date:
July 02, 2018
Export Citation:
Assignee:
CITIZEN WATCH CO.,LTD.
International Classes:
H02P8/02; G04C3/14
Domestic Patent References:
| JP20163877A | ||||
| JP2009213221A | ||||
| JP2016170019A |
Attorney, Agent or Firm:
Patent Attorney Corporation Haruka International Patent Office
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