| 摘要 |
PURPOSE:To perform high efficiency of a piezoelectric motor and to enable to drive at a low voltage by reducing the thickness of one piezoelectric element, and superposing many layers one upon another. CONSTITUTION:Signals Asinomegat and Acosomegat are respectively applied from oscil- lators 11a, 11b to a piezoelectric element respectively. The element is constructed by superposing a plurality of piezoelectric element 12a, 12b or 12c, 12d per one block through electrodes 13a-13c or 13d-13f. Assuming that piezoelectric motors having the same volume and the same applied voltage are provided, the thickness of one piezoelectric element is reduced, the number of the elements is increased, thereby improving the output torque. |
