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Surface acoustic wave rotary motor

A technology of rotating motors and surface acoustic waves, applied in the direction of electrical components, piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, etc., can solve the problems that surface acoustic wave motors are difficult to achieve rotational motion, etc. Achieve the effect of simple structure, small size and high driving precision

Inactive Publication Date: 2017-02-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a surface acoustic wave rotary motor to solve the problem that the current surface acoustic wave motor is difficult to achieve rotary motion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment one: if figure 1 As shown, the plane formed by the contact line between the rotor (7) of the surface acoustic wave rotating motor and a certain piezoelectric substrate (4) and the axis of the rotor (7) is the plane between the rotor (7) and the surface acoustic wave device (2) symmetrical plane, apply a certain preload to the left and right push plates (5) and the upper baffle (6), then apply the same sinusoidal signal to the interdigital transducers (301, 303, 305, 307), and apply no signal to the interdigital transducers (302, 304, 306, 308), The counterclockwise rotation of the rotor (7) can be realized; the same sinusoidal signal is applied to the interdigital transducers (302, 304, 306, 308), and no signal is applied to the interdigital transducers (301, 303, 305, 307), the clockwise rotation of the rotor (7) can be realized. Under the condition of not changing other parameters, the clockwise rotation speed of the rotor is equal to the counterclockwise r...

Embodiment 2

[0027] Embodiment two: if Figure 4 As shown, the plane formed by the contact line between the rotor (7) of the surface acoustic wave rotary motor and any piezoelectric substrate (4) and the axis of the rotor (7) is not the plane formed by the rotor (7) and the surface acoustic wave device (2). ), apply a certain preload to the surface acoustic wave device (202, 203, 204), then apply the same sinusoidal signal to the interdigital transducer (301, 303, 305, 307), and apply no signal to the interdigital transducer (302, 304, 306, 308), so that the rotor ( 7) counterclockwise rotation; apply the same sinusoidal signal to the interdigital transducers (302, 304, 306, 308), and apply no signal to the interdigital transducers (301, 303, 305, 307), so that the clockwise rotation of the rotor (7) can be realized without changing other parameters The clockwise rotation speed of the rotor under the condition is not equal to the counterclockwise rotation speed of the rotor.

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Abstract

The invention relates to an ultrasonic rotary motor based on surface acoustic wave, mainly comprising a fixing shell, a surface acoustic wave device, push plates, an upper retaining plate and a rotor, wherein the surface acoustic wave device comprises two pairs of interdigital transducers and a piezoelectric substrate. The part of a rotor in contact with the piezoelectric substrate is positioned in an area between the two pairs of interdigital transducers, certain pressure is applied to the left and right push plates and the upper retaining plate, a high-frequency sinusoidal signal is applied to the specified interdigital transducer to excite the surface acoustic wave device to generate surface acoustic wave, and the rotor can be rotated clockwise and anticlockwise by the aid of frictional force between the rotor and the piezoelectric substrate. The ultrasonic rotary motor has the advantages of simple structure, small size, high drive precision, low control difficulty, low cost and the like.

Description

technical field [0001] The invention belongs to the field of ultrasonic motors, in particular to a surface acoustic wave rotary motor. Background technique [0002] With the rapid development of modern science and technology, the role of micro-machines in social production is becoming more and more prominent. Therefore, as the core component of micro-mechanical systems, micro-motors have attracted extensive attention from domestic and foreign researchers. Although the traditional electromagnetic motor has the advantages of fast speed, high power, and high energy utilization rate, its internal structure is relatively complicated, and because its driving principle is to use the electromagnetic force between the rotor magnet and the stator coil to drive the rotor to rotate, it is easily affected by the outside world. Electromagnetic interference, in addition, the traditional electromagnetic motor has a large size and low driving precision. [0003] Because traditional electrom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/10H02N2/12
CPCH02N2/10H02N2/12
Inventor 刘国君马祥张炎炎吴越赵心李新波刘建芳杨志刚
Owner JILIN UNIV
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