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Title:
DRIVING DEVICE, IMAGE FORMING APPARATUS INCLUDING THE SAME, AND IMAGE FORMING SYSTEM
Document Type and Number:
Japanese Patent JP2018050358
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a driving device that can control the drive of a stepping motor with one A/D converter.SOLUTION: A driving device included in an image forming apparatus 301 comprises: a motor 167a that includes two or more phase windings 401a to 401d; a motor drive control part 157a; and a common A/D converter 153a that detects a current flowing in at least two phases of windings of the phase windings of the motor and detects the current in a plurality of phases of the motor in a time-division manner. The image forming apparatus further includes a system controller 151 that controls the order of the timing of transition to generate two or more phases of PWM signals 171a to 171c for the drive control part to apply a desired driving voltage to the windings of the motor and in a triangular wave comparison system using a triangular wave as a carrier and a motor drive voltage as a modulation wave, and the timing of detection to detect the current. The system controller generates the two or more phases of PWM signals at the same or common cycle, and changes the order and timing according to two PWM duty ratios.SELECTED DRAWING: Figure 2

Inventors:
YAMAZAKI KATSUYUKI
Application Number:
JP2016182633A
Publication Date:
March 29, 2018
Filing Date:
September 20, 2016
Export Citation:
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Assignee:
CANON KK
International Classes:
H02P8/14; B41J29/38; H02P21/26
Attorney, Agent or Firm:
Masatake Suzuki



 
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