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piezoelectric motor

A technology of piezoelectric motors and piezoelectric elements, which is applied to electrical elements, piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, etc., can solve the problem that the motor is difficult to achieve low cost, and the vibration part does not Fixed issues with specific node positions etc.

Active Publication Date: 2020-12-08
PHYSIK INSTR PI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the very precise machining of the vibrating beam elements and the very close tolerances in which the motors are manufactured makes it difficult to achieve low cost
Also, the vibrating part of the motor does not have a specific nodal position to be fixed during operation

Method used

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Embodiment Construction

[0037] figure 1 A possible embodiment of the piezoelectric motor according to the invention is shown in front view. The piezoelectric motor 1 comprises two piezoelectric actuators 2 spaced apart from each other, thus defining a space or gap 8 between them. The two piezoelectric actuators 2 have the same structure and form in the form of a rectangular plate with two oppositely arranged main surfaces 5 and four side surfaces 6, said main surface 5 being the largest surface of the rectangular plate , the side surface 6 connects the two main surfaces. Each piezoelectric actuator includes two piezoelectric elements 3 arranged oppositely, and a metal connector is arranged between them so that the metal connector is sandwiched between the piezoelectric elements. The two piezoelectric elements of the piezoelectric actuator are polarized such that the corresponding polarization vector of one piezoelectric element is arranged in an opposite direction relative to the corresponding pola...

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Abstract

A piezoelectric motor (1) is proposed which comprises at least two piezoelectric actuators (2), each piezoelectric actuator comprising at least two piezoelectric elements (3) arranged at opposite sides of a coupling element (4, 11) and having two oppositely arranged large main surfaces (5) connected to each other by at least four side surfaces (6). The piezoelectric actuators are spaced from each other but coupled via at least one elastic element (7) intended for direct or indirect frictional contact with an element to be driven. The at least one elastic element (7) is attached to at least a part of a side surface (6) of the piezoelectric actuators thus bridging the space (8) between them. The piezoelectric actuators deform in a direction substantially perpendicular to a plane (9) defined by the side surface to which the elastic element (7) is attached by using the longitudinal piezoelectric effect of the elements.

Description

technical field [0001] The present invention relates to piezoelectric motors. Background technique [0002] US Patent 6,984,920 B2 describes piezoelectric motors connected in longitudinal mode. Here, two sets of piezoelectric plates are placed between two specially designed elastic elements (one constituting the vibrating beam element and the other constituting the backrest element). When two sets of piezoelectric elements are excited by two sinusoidal signals with a specified phase difference, the resulting vibration is amplified by the vibrating beam element and transmitted to the sliding element through frictional contact. However, the very precise machining and very close tolerance manufacturing of the vibrating beam elements makes it difficult to achieve low cost motors. Furthermore, the vibrating part of the motor does not have a specific node position to be fixed during operation. It is also impossible to make the motor have a thin body, while the elastic vibrating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04
CPCH02N2/02H02N2/04H02N2/0025H02N2/026H02N2/103
Inventor 布尔汉埃廷·科克
Owner PHYSIK INSTR PI