| 摘要 |
<P>PROBLEM TO BE SOLVED: To sustain a stabilized torque even when deflection has occurred in contact between a rotor and a stator. <P>SOLUTION: In an ultrasonic motor where a rotor is driven by vibrating the oscillation piece of a stator touching the rotor by means of a piezoelectric element, each phase of the stator for generating a traveling wave is arranged on the inner circumference and the outer circumference of the piezoelectric element. <P>COPYRIGHT: (C)2007,JPO&INPIT |
