Title:
シート搬送装置及び画像形成装置
Document Type and Number:
Japanese Patent JP6498227
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve a problem that switching between a constant current control and a vector control may occur repeatedly when switching control of a motor.SOLUTION: Two threshold values for switching between a constant current control and a vector control are provided. To be specific, when a rotational speed ω of a rotor 402 becomes larger than a threshold value ω1 by acceleration during constant current control, control of a motor is switched from the constant current control to the vector control. During the vector control, even if the rotational speed ω of the rotor 402 comes to be less than the threshold value ω1 by deceleration, switching to the constant current control is not performed, and when the rotational speed of the rotor further decreases to be less than a threshold value ω2, the control of the motor is switched from the vector control to the constant current control. As a result, repeated switching between the constant current control and the vector control is suppressed.SELECTED DRAWING: Figure 6
Inventors:
Yudai Nito
Application Number:
JP2017035390A
Publication Date:
April 10, 2019
Filing Date:
February 27, 2017
Export Citation:
Assignee:
Canon Inc
International Classes:
H02P8/38; G03G15/00; G03G21/14; H02P21/34
Domestic Patent References:
| JP2005039955A | ||||
| JP2004320847A | ||||
| JP2003221161A | ||||
| JP2006081230A | ||||
| JP2014075931A | ||||
| JP2008278595A | ||||
| JP2008252583A |
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa