| 摘要 |
<p>In a driving device for an ultrasonic motor which includes a stator for generating a travelling vibration wave in an elastic member by the excitation of a piezoelectric member and a rotor brought into contact with the stator by means of a pressurization means, the rotor being driven by the travelling vibration wave, a drive signal which drives the motor is supplied to the motor through an induction element. A phase difference between signals input to and output from the induction element is measured, and drive of the ultrasonic motor is controlled using the obtained value.</p> |
