| 摘要 |
PURPOSE:To obtain a piezoelectric motor which has excellent electromechanical conversion efficiency and bidirectional mobility by coating both side surfaces of a piezoelectric element formed in an endless shape with elastic units by polarizing a plurality of poles in the circumferential direction and providing a movable element to hold both sides of the elastic units. CONSTITUTION:Piezoelectric ceramic ring 25 formed in an endless shape and polarized in a plurality of poles in the circumferential direction is interposed between elastic units 23 and 24 to form an endless annular stator 21. A movable element 22 having a pressure regulator 27 is mounted to hold the stator 21 from both sides to form a piezoelectric motor. In order to drive the motor, a voltage is applied to the ceramic ring 25 to generate traveling waves on both side surfaces of the stator 21 to move the element 22 in the prescribed direction. Thus, the sliding frictional force to act on the element can be increased, and the electromechanical conversion efficiency can be improved with excellent response property. |
