Invention Grant
- Patent Title: Method of controlling vibration motor
- Patent Title (中): 控制振动电机的方法
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Application No.: US13107121Application Date: 2011-05-13
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Publication No.: US09000691B2Publication Date: 2015-04-07
- Inventor: Akio Atsuta
- Applicant: Akio Atsuta
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2010-124793 20100531; JP2011-091077 20110415
- Main IPC: H02K33/00
- IPC: H02K33/00 ; H02P25/02

Abstract:
Provided is a method of controlling a vibration motor, in which there are provided: a unit that generates a drive signal for generating elliptic motion; a unit that switches the drive signal with a voltage from a power supply, and changes a pulse width of the drive signal; a unit that detects a current flowing in an electromechanical energy conversion element through the switching unit; a unit that detects a position and a velocity of an object to be driven; and a control unit that controls the respective units, and sets the velocity of the object to be driven. The control unit controls a frequency and the pulse width of the drive signal so as to exercise a maximum output characteristic with respect to a target velocity within a range in which the current detected by the current detection unit does not exceed a given limit value.
Public/Granted literature
- US08957609B2 Method of controlling vibration motor Public/Granted day:2015-02-17
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