Title:
DRIVE CONTROL DEVICE AND ULTRASONIC MOTOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/172731
Kind Code:
A1
Abstract:
Provided is a drive control device capable of extending the life of an ultrasonic motor element. A drive control device 1 drives an ultrasonic motor element 2 having a vibrating body and a piezoelectric element provided above the vibrating body. The drive control device 1 comprises: a speed detection unit 15 for detecting the driving speed of the ultrasonic motor element 2; a control unit 16 for setting drive conditions for the ultrasonic motor element 2; and a drive circuit unit 17 for applying a drive voltage to the piezoelectric element on the basis of the drive conditions set by the control unit 16. The control unit 16 sets the drive conditions for the ultrasonic motor element 2 on the basis of the cumulative uptime of the ultrasonic motor element 2 for each driving speed.
Inventors:
TERASAWA MITSUSHIRO (JP)
TAKATA MASAAKI (JP)
KUSHIMA TAKAHITO (JP)
MIZUSHIMA YUZO (JP)
HIGASHIYAMA KATSUHISA (JP)
TAKATA MASAAKI (JP)
KUSHIMA TAKAHITO (JP)
MIZUSHIMA YUZO (JP)
HIGASHIYAMA KATSUHISA (JP)
Application Number:
PCT/JP2022/002229
Publication Date:
August 18, 2022
Filing Date:
January 21, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02K11/21; H02N2/14
Foreign References:
| JP2020182328A | 2020-11-05 | |||
| JP2006101579A | 2006-04-13 | |||
| JP2003339175A | 2003-11-28 |
Attorney, Agent or Firm:
OSAKA FRONT (JP)
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