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A Piezoelectric Motor Driven by Sawtooth Wave

A piezoelectric motor and sawtooth wave technology, applied in the field of precision drive and positioning, can solve the problems of high cost, low moving speed, difficult miniaturization, etc., and achieve the effect of high price, large working step distance and low cost

Active Publication Date: 2021-03-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex structure, low moving speed, and high cost of traditional piezoelectric motors used as positioning devices, the present invention provides a linear piezoelectric motor driven by a sawtooth wave

Method used

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  • A Piezoelectric Motor Driven by Sawtooth Wave
  • A Piezoelectric Motor Driven by Sawtooth Wave
  • A Piezoelectric Motor Driven by Sawtooth Wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] see figure 1 with figure 2 , a piezoelectric motor driven by a sawtooth wave includes a drive mechanism and a pretension mechanism.

[0032] see image 3 , the driving mechanism includes a body 1 , a piezoelectric stack 8 and a mass 7 . The body 1 is tubular, with an end cap 2 fixedly installed at one end and an open end at the other end. The piezoelectric stack 8 and the mass block 7 are columnar, and one end is connected to each other; the other end of the piezoelectric stack 8 is fixedly connected to the end cover 2 , and the piezoelectric stack 8 and the mass block 7 are located in the body 1 in a cantilever shape.

[0033] see figure 1 , The pre-tightening mechanism includes a clamping block 6 , a pre-tightening bolt 3 and a spring 5 . see Figure 4 , the clamping block 6 is a U-shaped clamping block; one side of the opening end of the clamping block 6 is provided with a through hole 61, and the other side is provided with a threaded hole 62, and the pre-tig...

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Abstract

The invention relates to a piezoelectric motor driven by sawtooth waves, and belongs to the technical field of precision driving and positioning. The piezoelectric motor comprises a driving mechanismand a pre-tightening mechanism, the driving mechanism comprises a body, a piezoelectric stack and a mass block; the pre-tightening mechanism comprises a clamping block, a pre-tightening bolt and a spring. The piezoelectric motor is low in cost and easy to manufacture, and continuous one-way linear movement of the piezoelectric motor can be achieved only through one sawtooth wave driving signal andone piezoelectric stack. According to the invention, the working frequency is 1.25 KHz, and the working voltage is 60 V; the horizontal axial movement stroke is 30 mm, the horizontal axial no-load speed is 5 mm / s, the working step pitch is 4 microns, micron-scale positioning and centimeter-scale stroke can be achieved, and the piezoelectric motor is very suitable for being used as a fine adjustment positioning device of precision machines such as a micro scanning probe microscope and an optical fiber scanning system.

Description

technical field [0001] The invention belongs to the technical field of precision driving and positioning, and in particular relates to a linear piezoelectric motor. Background technique [0002] Piezoelectric motor is a device that uses the piezoelectric inverse effect of piezoelectric body to convert electromechanical energy. It has the advantages of fast response, simple operation, and anti-electromagnetic interference. It has been widely studied and applied at home and abroad. At present, piezoelectric motors are often used as precision positioning devices in the fields of precision positioning systems and optical fiber scanning technology. Traditional piezoelectric motors generally have problems such as complex structure, difficulty in miniaturization, low moving speed, and high cost, and there are various inconveniences when used as a precision positioning device. [0003] An inertial nano-stepper motor based on piezoelectric stacks uses four silicon nitride balls and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02
CPCH02N2/021
Inventor 贺良国程子阳韩江王武葛新方张勇高广杰严毅
Owner HEFEI UNIV OF TECH
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