Piezoelectric actuator and piezoelectric motor

A piezoelectric driver and driving voltage technology, which is applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve complex manufacturing processes, external interference, and large power consumption and other issues, to achieve the effect of convenient production, avoiding failure problems, and low power consumption

Active Publication Date: 2013-08-21
PEKING UNIV
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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

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  • Piezoelectric actuator and piezoelectric motor
  • Piezoelectric actuator and piezoelectric motor
  • Piezoelectric actuator and piezoelectric motor

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Embodiment Construction

[0029] In view of the traditional piezoelectric L1-B2 dual-vibration mode piezoelectric motor, the piezoelectric driver has complex structures and manufacturing processes, and the cost of large-scale production of the piezoelectric driver is relatively high. The present invention provides a piezoelectric driver that can work in the first The single working mode of the bending vibration along the diagonal in the step plane effectively simplifies the structure of the piezoelectric actuator. The single working mode and simple square plate structure can effectively reduce the manufacturing cost of the piezoelectric driver; at the same time, it can also simplify the design of the driving circuit and avoid the problem of driving failure caused by external interference when working in two modes.

[0030] Specifically, the driver provided by the present invention may include a piezoelectric body, the piezoelectric body is a square plate-shaped structure, and the piezoelectric body is p...

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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...

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Application Information

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IPC IPC(8): H02N2/02H02N2/04H02N2/06H02N2/10H02N2/12H02N2/14
Inventor 董蜀湘慈鹏弘陈治江
Owner PEKING UNIV
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