| 摘要 |
PURPOSE:To obtain a low speed rotation with a simple configuration by rotating the center of a movable unit around the output shaft of a rotor, thereby rotating the rotor around its own axis. CONSTITUTION:A bearing 2 for supporting the output shaft 10 of a rotor 12 is secured to the center on the bottom of a cylindrical stationary frame 1 having the bottom, and stretchable units 5A-7A, 5B-7B which are made of piezoelectric elements provided with buffer rubbers 4 on both side surfaces are secured to the inner peripheral wall 3 of the frame 1. When sinusoidal AC voltages which are displaced at 120 deg. of phase are respectively applied to the units 5A and 5B, 6A and 6B, 7A and 7B, the center of a movable element 1 rotates around the center of a rotor 12, and the rotor 12 starts rotating at a low speed around its own axis by the rotation of the element 1. |
