Invention Grant
- Patent Title: Driving apparatus
- Patent Title (中): 驱动装置
-
Application No.: US12538415Application Date: 2009-08-10
-
Publication No.: US08084899B2Publication Date: 2011-12-27
- Inventor: Hiromu Yasuda
- Applicant: Hiromu Yasuda
- Applicant Address: JP
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2005-218968 20050728
- Main IPC: H02K37/00
- IPC: H02K37/00

Abstract:
A driving apparatus includes a first magnet, second magnet, stator, first coil, second coil, first bearing, second bearing and rotor. The first and second magnets respectively have a magnetized portion in which S pole and N pole are alternately magnetized. The rotor has a magnetic pole portion opposite to each magnetized portion. The stator fixes the first magnet and second magnet to the same axis to rotatably support the rotor. The first coil magnetically excites a portion where the magnetic pole portion of the rotor faces the first magnet. The second coil magnetically excites a portion where the magnetic pole portion of the rotor faces the second magnet. Thereby, a driving apparatus is provided which stabilizes the quality by simplifying the configuration of a rotor and makes it possible to realize high speed of rotation and improvement of response speed by decreasing the moment of inertia of a rotor.
Public/Granted literature
- US20090295238A1 DRIVING APPARATUS Public/Granted day:2009-12-03
Information query