Abstract: The proposed motor comprises a stator and a rotor frictionally interacting with said stator, either said stator and rotor including at least one piezoelectric oscillator. Said oscillator includes a piezoelectric element and electrodes located on the opposite surfaces of the piezoelectric element and connected to a supply source for exciting in this oscillator a resonant mode of longitudinal acoustic vibrations. The motor further includes at least two pushers, each having one end secured on said oscillator and the other end urged against a surface of frictional interaction of the rotor and stator. The piezoelectirc element used in this motor is polarized in the direction perpendicular to the surfaces of the electrodes and is positioned so that the propagation direction of the resonant mode of the longitudinal vibrations is perpedicular to the surface of frictional interaction.

Abstract: A piezoelectric motor of the invention comprises a stator and a rotor one of which includes at least one first piezoelectric oscillator. The rotor consists of a first and a second parts one of which parts includes a second piezoelectric oscillator. Said parts of the rotor are mounted for relative rotation about the axis of rotation. The first part is in contact with the stator along the first surface of frictional interaction and with the second part along the second surface of frictional interaction. Each surface of frictional interaction is formed by rotation of at least one straight line length about the axis of rotation of the rotor.