Title:
駆動装置
Document Type and Number:
Japanese Patent JP5355029
Kind Code:
B2
Abstract:
A drive apparatus includes a magnet rotor having a plurality of magnetic poles that are magnetized, a stator having a magnetic pole portion that opposes each pole of the magnet rotor, a coil configured to excite the magnetic pole portion, a position detector configured to detect a position of the magnet rotor, a first driver configured to switch an electrification state of the coil in accordance with a preset time interval, a second driver configured to switch an electrification state of the coil in accordance with an output of the position detector, and a controller configured to select the first driver when the output of the position detector is less than a first threshold, and to select the second driver when the output of the position detector is equal to or larger than the first threshold.
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Inventors:
Kosuke Kiyamura
Yu Yasuda
Qingdao Lieutenant
Yu Yasuda
Qingdao Lieutenant
Application Number:
JP2008270273A
Publication Date:
November 27, 2013
Filing Date:
October 20, 2008
Export Citation:
Assignee:
Canon Inc
International Classes:
H02P6/06; H02P6/08; H02P6/15; H02P6/24; H02P7/06
Domestic Patent References:
| JP2004056856A | ||||
| JP10062679A | ||||
| JP2002199768A | ||||
| JP2005282877A | ||||
| JP10094286A | ||||
| JP9261990A | ||||
| JP2008035688A |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Atsushi Mizumoto
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