Piezoelectric drive and piezoelectric motor

Abstract

The invention provides a piezoelectric drive and a piezoelectric motor. The piezoelectric drive comprises a piezoelectric body, wherein the piezoelectric body has a square plate structure, and is polarized along the thickness direction; a first electrode layer is arranged on a first end main plane in the thickness direction of the piezoelectric body, a second electrode layer is arranged on a second end main plane in the thickness direction of the piezoelectric body; and the first electrode layer comprises a plurality of electrode areas which are electrically isolated with one another, so that under the action of a preset driving voltage applied to each electrode layer, the piezoelectric drive is excited to generate two mutually orthogonal first-order bending vibrations at the same time, and the two mutually orthogonal first-order bending vibrations are synthesized with each other to generate elliptical orbit movements. The piezoelectric drive is simple in structure and convenient to manufacture, and can work in a first-order bending vibration mode under the preset driving voltage, so that the driving circuit power consumption can be effectively reduced.

Description

technical field [0001] The invention relates to piezoelectric motor technology, in particular to a piezoelectric driver and a piezoelectric motor. Background technique [0002] The piezoelectric motor uses the inverse piezoelectric effect of the piezoelectric element and the ultrasonic vibration of the elastic body to convert the micro-vibration of the elastic body into a macroscopic linear motion of the moving body through the friction between the stator and the moving body (mover). , to directly push the load, and the piezoelectric motor has the advantages of compact structure and small volume, and has been widely used. Among them, the piezoelectric motor mainly includes a piezoelectric driver and a sliding component. The piezoelectric driver is a stator, and the sliding component is a mover. The driving voltage is provided for the piezoelectric driver through the drive circuit, so that the piezoelectric driver can produce a certain movement, and then push Slide component...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a piezoelectric driver and a piezoelectric motor, which can effectively overcome the problems of complex manufacturing process, high power consumption and easy interference from the outside existing in the piezoelectric driver using two working modes. The piezoelectric driver has a simple structure and is easy to manufacture. Convenience, and can work in the first order bending vibration mode

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