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SMD square ultrasonic motor vibrator and driving method thereof

An ultrasonic motor, patch type technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of weakening vibration, complex overall structure, ultrasonic motor vibrator electrode The effective area of ​​the surface is small and other problems, and the effect of large effective area and simple composition structure is achieved

Inactive Publication Date: 2015-08-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the existing ultrasonic motor vibrator has a small effective area on the electrode surface, the overall structure is complex, and the cross support beam interferes with the vibration track and weakens the vibration in the existing similar motor structure, a patch type square ultrasonic motor vibrator and its drive method

Method used

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  • SMD square ultrasonic motor vibrator and driving method thereof
  • SMD square ultrasonic motor vibrator and driving method thereof
  • SMD square ultrasonic motor vibrator and driving method thereof

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specific Embodiment approach 1

[0024] Specific Embodiments 1. The chip-type square ultrasonic motor vibrator described in this embodiment includes a vibrating body 1 and four sets of piezoelectric ceramic elements 3,

[0025] The vibrating body 1 is a center-symmetrical structure. The vibrating body 1 is composed of two pairs of semi-circular curved beams and four V-shaped beams. The two curved beams belonging to the same pair of curved beams are opposite to each other. Between the two curved beams, the two pairs of curved beams and the four V-shaped beams form a square sheet-shaped cross vibration body, and the sharp points of the four V-shaped beams form four driving feet, and the outer arcs of each pair of curved beams are opposite to each other. set up;

[0026] Each group of piezoelectric ceramic elements 3 is composed of two piezoelectric ceramic units, each piezoelectric ceramic unit is a semi-annular thin plate, and the radius of curvature of the semi-annular thin plate is the same as that of the cu...

specific Embodiment approach 2

[0030] Specific Embodiment 2. The difference between this embodiment and the chip-type square ultrasonic motor vibrator described in Specific Embodiment 1 is that the polarization directions of the two piezoelectric ceramic units located in the same group of piezoelectric ceramic elements 3 are opposite, and each The polarization direction of one piezoelectric ceramic unit among the two adjacent piezoelectric ceramic units along the circumferential direction is the same as that of the other piezoelectric ceramic unit, and opposite to that of the other piezoelectric ceramic unit.

[0031] The so-called circumferential direction means that in the vibrator, a circle is made with the center of the symmetrical cross center line of this structure as the origin, and the tangential direction on the circumference is the "circumferential direction".

specific Embodiment approach 3

[0032] Embodiment 3. The difference between this embodiment and the patch-type square ultrasonic motor vibrator described in Embodiment 1 is that each piece of piezoelectric ceramic unit is composed of a piezoelectric body and a pair of electrode sheets, forming a pair of electrodes The two electrode sheets of the sheet are respectively located on the upper surface and the lower surface of the piezoelectric body.

[0033]The piezoelectric body described in this embodiment is formed of lead zirconate titanate piezoelectric ceramics, but is not limited to lead zirconate titanate piezoelectric ceramics, and may also be formed of other piezoelectric materials such as polyvinylidene fluoride and aluminum nitride. Piezoelectric body. The electrode sheet is realized by coating of appropriate metal materials such as Al, Cu, Ag, Ag-Pd alloy and the like arranged on the surface of the piezoelectric ceramic element.

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Abstract

The invention provides an SMD (Surface Mounted Device) square ultrasonic motor vibrator and a driving method thereof, relates to an ultrasonic motor vibrator formed by symmetrically arranging a plurality of piezoelectric components on both sides of a vibrating body, and solves the problems of an existing ultrasonic motor vibrator that the effective surface of the electrode surface is small and the over-all structure is complicated. The vibrator comprises a vibrating body and four groups of piezoceramic components, wherein the vibrating body adopts a center-symmetrical structure; the vibrating body consists of two pairs of semi-circular curved beams and four V-shaped beams; the positions of every two semi-circular curved beams which belong to one pair of the curved beams are opposite to each other; each V-shaped beam is located between every two curved beams; four cusps of the V-shaped beams form four driving feet; the outer arcs of each pair of the curved beams are arranged relatively; each piezoceramic component in each group includes two pieces of piezoceramic sheets; each piece of the piezoceramic sheet is a semi-circular lamella; the curvature radius of each semi-circular lamella is same as that of each curved beam; and all the piezoceramic sheets are polarized in the thickness direction. The invention can be applied to the aspects of national defense-related science and technology, micro machine, medical and the like.

Description

technical field [0001] The present invention relates to a square patch type ultrasonic motor vibrator, and more specifically, relates to a plurality of piezoelectric components symmetrically arranged on both sides of a vibrating body to form an ultrasonic motor vibrator. Background technique [0002] Ultrasonic motor is a drive device with a new concept that has appeared in the past 30 years. Compared with traditional electromagnetic motors, it has small inertia, is not affected by magnetic fields, runs quietly, has high torque at low speed, can directly drive loads, and is self-locking when power is off. The form is flexible and diverse. The ultrasonic motor uses the inverse piezoelectric effect of the piezoelectric material to convert the electrical energy into the vibration energy of the stator of the ultrasonic motor, which is converted into the rotation or linear motion of the moving parts through friction. It is generally mainly composed of functional components such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/12
Inventor 陈维山周详宇刘军考刘英想石胜军
Owner HARBIN INST OF TECH
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