Patent ID: 9705425
Date: 2017-07-11
CPC Classifications: H01L,H02N

Claim:
1. A piezoelectric motor, comprising: a base; at least two frictionally engaged components that can move relative to each other, mounted within the base, for converting electric current into motion; one of the two frictionally engaged components comprises a piezoelectric element in the form of a rectangular plate having a length to width ratio of 1.0 to 1.2, with metal coatings on its opposing main planar surfaces that define one or more electrodes, at least one having one or more leads for connection to a source of an alternating current; said piezoelectric element pressed against a cylindrical or planar surface of the other frictionally engaged component whereby a contact area of the piezoelectric element frictionally engages the cylindrical or planar surface; wherein the shape of the piezoelectric element, an arrangement and a number of the electrodes, and the source of the alternating current, are configured to satisfy a condition of resonant excitation in the piezoelectric element, wherein: