Stacked Bend Piezo Actuator

Abstract

The invention discloses a laminated bending-type piezoelectric ceramic driver and belongs to the technical field of piezoelectric driving. The laminated bending-type piezoelectric ceramic driver is used for enriching the current variety of piezoelectric elements and extending the application scope of the piezoelectric elements. Piezoelectric ceramic sheets of the laminated bending-type piezoelectric ceramic driver are divided evenly into four independent polarized sectors. A ground electrode includes ground electrode sheets and a ground extraction electrode; and an excitation electrode includes excitation electrode sheets and excitation extraction electrodes. Both the ground electrode and the excitation electrode are in a comb-teeth-shaped configuration. According to the invention, excitation is carried out by using a piezoelectric ceramic d33 mode and adopting a four-divided-polarized-sector configuration form of the piezoelectric ceramic sheets, so that a bending deformation in a certain direction or in an orthogonal direction of two spaces can be achieved by the laminated bending-type piezoelectric ceramic driver. The ground electrode and the excitation electrode which are in a comb-teeth-shaped configuration are adopted and it can be effectively guaranteed that the multi-layer piezoelectric ceramic sheets are connected mechanically in series and electrically in parallel; the laminated bending-type piezoelectric ceramic driver has a good overall structure; and the laminated bending-type piezoelectric ceramic driver serves as a supplement to the existing piezoelectric elements, and the application scope of the piezoelectric elements will be extended and the development of the piezoelectric driving technical field will be advanced.

Description

technical field [0001] The invention relates to a piezoelectric ceramic driver and belongs to the technical field of piezoelectric driving. Background technique [0002] As a new type of precision drive and micro-positioning technology, piezoelectric drive mainly uses the inverse piezoelectric effect of piezoelectric materials to convert electrical energy into mechanical energy. Due to its unique structural design, flexible design, no electromagnetic interference and no Features such as electromagnetic interference, millisecond-level fast response, and power-off self-locking have attracted widespread attention in recent years, and have been successfully applied in precision optical instruments, biomedical equipment, aerospace and other technical fields. [0003] Piezoelectric ceramics are one of the most important components in piezoelectric actuators, and play a key role in the process of converting electrical energy input into mechanical energy output. In order to obtain ...

AI Technical Summary

Problems solved by technology

[0004] Most of the current multilayer piezoelectric ceramic actuators are longitudinally stretchable and deformable drivers, that is, when an excitation electrical signal is applied, the entire actuator will produce stretching deformation along the thickness direction of the piezoelectric ceramic sheet, and the multilayer piezoelectric ceramics that can produce bending deformation as a whole Drive, there is no organization or company to design and develop at present, and bending deformation is an actuation method often used in the design of piezoelectric actuators, so a bending multilayer piezoelectric ceramic actuator is designed as the basis of piezoelectric actuators Components will have a profound impact on expanding the application range of piezoelectric elements and promoting the development of piezoelectric drive technology

Images