Patent ID: 9136778
Filing Date: 2015-09-15
Classification: H01L,H02N

Abstract:
1. A piezoelectric motor comprising: a rotor with an outer working cylindrical surface set for rotation relative to a motor base; a piezoelectric actuator positioned relative to the rotor in such manner that a working end of the actuator is in linear, frictional, resilient and forced contact with the working surface of the rotor, the piezoelectric actuator including a piezoelectric resonator made in the shape of a longitudinal prism with a trapezoidal cross-section having longitudinal lateral surfaces and a base surface and the working end of the actuator is a flat pusher insert set at an angle to the plane of the resonator base; and an electronic generator connected to electrodes of the piezoelectric actuator to excite periodic mechanical oscillations in the actuator; wherein the electrodes are applied onto the longitudinal lateral trapezoidal surfaces of the resonator and the piezoelectric resonator is polarized across its width, parallel to the resonator base, and the electronic generator outputs an alternating electrical voltage signal at a frequency matching the frequency of the first-order natural longitudinal mode of mechanical oscillation along the length of the resonator.