METHOD FOR SETTING DRIVE SIGNAL FREQUENCY OF ULTRASONIC MOTOR AND DRIVING DEVICE FOR ULTRASONIC MOTOR

摘要

PROBLEM TO BE SOLVED: To provide a method for setting a drive signal frequency of ultrasonic motor adapted to set a drive signal frequency of each ultrasonic vibrator in a simple manner in a short time in an ultrasonic motor having a plurality of ultrasonic vibrators.;SOLUTION: A driving device for ultrasonic motor includes a resonance frequency detecting portion 31 for detecting a resonance frequency of either one ultrasonic vibrator among a plurality of ultrasonic vibrators 10a to 10c, a resonance frequency computing portion 32 for computing resonance frequencies of the other ultrasonic vibrators, respectively, and a drive signal frequency setting portion 33 for setting drive signal frequencies of the ultrasonic vibrators 10a to 10c, respectively.;COPYRIGHT: (C)2007,JPO&INPIT