Invention Grant
- Patent Title: Vibration-type motor controller and optical apparatus
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Application No.: US14024122Application Date: 2013-09-11
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Publication No.: US09276502B2Publication Date: 2016-03-01
- Inventor: Junichi Murakami
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2009-216607 20090918
- Main IPC: H02K33/00
- IPC: H02K33/00 ; H02N2/00 ; H02N2/14 ; G02B7/04

Abstract:
A vibration-type motor controller controls a driving speed of a vibration-type motor relatively moving a vibrating body in which a vibration is excited by an electromechanical energy conversion element 20 to which a first frequency signal and a second frequency signal having a phase difference are applied, and a contacting body which contacts the vibrating body. The vibration-type motor controller includes a speed controller 1 configured to alternately switch a frequency control which changes frequencies of the first and second frequency signals while fixing the phase difference and a phase difference control which changes the phase difference while fixing the frequency so that at least one of a plurality of frequency controls or a plurality of phase difference controls are included to increase and decrease the driving speed of the vibration-type motor.
Public/Granted literature
- US20140009846A1 VIBRATION-TYPE MOTOR CONTROLLER AND OPTICAL APPARATUS Public/Granted day:2014-01-09
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