Piezoelectric actuator and piezoelectric motor

Abstract

The invention provides a piezoelectric actuator and a piezoelectric motor. The piezoelectric actuator comprises a piezoelectric body which is of a square platy structure and is polarized in the thickness direction. A first electrode layer is arranged on a main plane of a first end of the piezoelectric body in the thickness direction, a second electrode layer is arranged on a main plane of a second end of the piezoelectric body in the thickness direction, the first electrode layer comprises a plurality of electrode areas, and the second electrode layer comprises at least one electrode area. The piezoelectric actuator can work in a simple first-order bending vibration mode, generates reciprocating straight-line trajectory movement or elliptical orbit movement, is simple in structure and convenient to manufacture, and can solve problems which exist in a traditional piezoelectric actuator.

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 mover, thereby directly driving load movement. Due to the advantages of compact structure and small volume, piezoelectric motors have been widely used. 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 to the piezoelectric driver through the drive circuit, so that the piezoelectric driver can produce a specific microscopic motion, and then push Sliding components generat...

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, large power consumption and easy interference from the outside in the traditional piezoelectric driver using two coupling modes, so that the structure of the piezoelectric driver is simple , is easy to make and can work in the simplest bending vibration mode

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