Title:
モータ駆動装置
Document Type and Number:
Japanese Patent JP5627340
Kind Code:
B2
Abstract:
A motor driving apparatus for constant-current control of a current of a coil of a motor includes a detector detecting the current, and a controller for controlling every first cycle to feed the coil until the current reaches a target value, and to decay the current after the current reaches the target value. The controller selects, every second cycle shorter than the first cycle, between decaying the current in a first mode and decaying the current in a second mode, in which a decay rate is lower than the first mode. In addition, the controller decays the current in the first mode when the current is equal to or higher than a predetermined threshold, and decays the current in the second mode when the current is lower than the predetermined threshold.
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Inventors:
須田 健之
Application Number:
JP2010188294A
Publication Date:
November 19, 2014
Filing Date:
August 25, 2010
Export Citation:
Assignee:
キヤノン株式会社
International Classes:
H02P8/12
Attorney, Agent or Firm:
Hiroyuki Niwa
Nakamura Eiko
Yoshiro Nishio
Nakamura Eiko
Yoshiro Nishio