Symmetrical double-feet driving offresonance piezoelectric linear motor

Abstract

The invention discloses a symmetrical double-feet driving offresonance piezoelectric linear motor, comprising a stator, a casing of the stator, a mover guide rail, guiding adjusting mechanisms, a precompression apparatus and a base. The stator is fixedly connected in the casing to form an integrity; the front end of the casing is provided with the mover guide rail, the rear end is in connection with the precompression apparatus, and left and right ends are respectively in connection with the guiding adjusting mechanisms; the precompression apparatus is internally provided with a precompression spring; under the restoring force effect generated by the deformation of the precompression spring, the front end of the casing keeps contact with the mover guide rail; the mover guide rail, the precompression apparatus, and the guiding adjusting mechanisms are all arranged on the base; the stator is composed of a stator supporting board, and two symmetrical driving feet, lamination electroceramics, cushion blocks, long hinges, and pre-tightening screws. The symmetrical motor has a structure simple, is convenient to install, and effectively guarantees the bidirectional actuation performance consistency of a piezoelectric motor; certain electric signals are respectively applied to four sets of lamination electroceramics to realize the bidirectional rectilinear motion of the piezoelectric motor.

Description

technical field [0001] The invention relates to a non-resonant piezoelectric linear motor, belonging to the technical field of piezoelectric precision actuation. Background technique [0002] The inverse piezoelectric effect of piezoelectric ceramics has the characteristics of high precision and fast response when applied to actuators, and has been favored by many researchers this year. In order to make the piezoelectric material produce sufficient deformation output, it is often necessary to apply a high voltage on the piezoelectric sheet, and the resonance of the structure is also used to amplify the micro-deformation of the piezoelectric material, which increases the complexity of the driving circuit. At the same time, the structure There is a strong nonlinearity in the resonance of the actuator with the frequency of the input electrical signal, which brings many technical difficulties to the control of the actuator. [0003] Multilayer piezoceramic is a new type of piez...

AI Technical Summary

Problems solved by technology

[0004] The main problem of the current non-resonant piezoelectric motor is the hysteresis effect of laminated piezoelectric ceramics, which leads to a certain difference in the bidirectional performance of the piezoelectric linear motor; it is difficult for the two driving legs of the bipedal stator to contact the mover guide rail at the same time And maintain a similar contact state, resulting in unstable performance of the motor; the stator drive foot and the mover adopt a point contact form, which limits the thrust of the motor to a certain extent

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