DRIVE CONTROL DEVICE AND ULTRASONIC MOTOR SYSTEM
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United States of America Patent
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Issued Date -
Oct 12, 2023
app pub date -
Jun 16, 2023
filing date -
Feb 12, 2021
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Abstract
A drive control device is provided that drives an ultrasonic motor element including a vibrating body and piezoelectric elements provided on the vibrating body. The drive control device includes a speed detector that detects a driving speed of the ultrasonic motor element, a controller that sets drive conditions of the ultrasonic motor element, and a drive circuit unit that applies a drive voltage to the piezoelectric elements based on the drive conditions set by the controller. Moreover, the controller sets the drive conditions of the ultrasonic motor element based on the accumulated operation time for each driving speed of the ultrasonic motor element.
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