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Stator of a thin-plate frame structure linear ultrasonic motor with fins and its excitation method

A technology of linear ultrasonic motor and frame structure, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motor, generator/motor, electrical components, etc., can solve the limitation of length or width direction, and the vibrator structure is not easy to miniaturize , bending vibration node bending deformation and other problems, to achieve the effect of large driving force and driving speed, simple fixing method, and degeneracy of frequency

Active Publication Date: 2021-10-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Ultrasonic motors are suitable for miniaturization. In summary, the stators (oscillators) of the above-mentioned linear ultrasonic motors have some difficulties in miniaturization. , are limited in the length or width direction; second, there are certain difficulties in fixing the vibrator. Generally, the fixed position is selected at the node of the first-order longitudinal vibration and the second-order bending vibration. However, the bending vibration node has bending deformation, which weakens the bending vibration

Method used

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  • Stator of a thin-plate frame structure linear ultrasonic motor with fins and its excitation method
  • Stator of a thin-plate frame structure linear ultrasonic motor with fins and its excitation method
  • Stator of a thin-plate frame structure linear ultrasonic motor with fins and its excitation method

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Embodiment 1

[0060] Embodiment 1, the quantity of the thin-plate empennage 2 of the present embodiment is 4, and two thin-plate empennages 2 are respectively arranged on both sides 1-2 of the V-shaped frame 1, as Image 6 As shown, the side length L=11.5mm of the V-shaped frame 1, the width B=2mm, and the included angle θ=60°. The mounting hole 4 is circular, located at the junction of the V-shaped side and the empennage, and fixed with a pin. The thin-plate empennage 2 is located at the end of the V-shaped side, and the structural size of the thin-plate empennage is completely symmetrical, and the two thin-plate empennages 2 are arranged symmetrically with the center line of the mounting hole. The length H=5.7mm of single thin-plate tail 2, width b=2mm, the thickness of both sides 1-2 of V-shaped frame 1 and thin-plate tail 2 are 0.5-2mm, the thin-plate tail 2 of the outside and V-shaped frame side angle 150 °, the angle between the inner tail fin and the V-shaped side is 150°, and two pi...

Embodiment 2

[0061] Embodiment 2. In this embodiment, on the basis of the V-shaped frame 1 described in Embodiment 1, the arrangement position and included angle of the thin-plate empennage 2 are adjusted. The difference from Embodiment 1 is that α=180°, β=90°, θ=90°, get as Figure 9 As shown in the stator structure, designing a circular drive at the driving point 1-1 is sufficient to increase the amplitude, and the symmetrical mode is as Figure 10 As shown, the antisymmetric mode is as Figure 11 As shown, the two modes are orthogonally superimposed at the driving point to form an elliptical motion and drive the guide rail to move.

Embodiment 3

[0062] Embodiment 3, on the basis of the V-shaped frame described in Embodiment 1, the arrangement position and the included angle of the thin plate empennage 2 are adjusted. The difference from Embodiment 1 is that α=90°, β=180°, and θ=90 °, get as Figure 12 As shown in the stator structure, designing a circular drive at the driving point 1-1 is sufficient to increase the amplitude, and the symmetrical mode is as Figure 13 As shown, the antisymmetric mode is as Figure 14 As shown, the two modes are orthogonally superimposed at the driving point to form an elliptical motion and drive the guide rail to move.

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Abstract

A thin-plate frame structure linear ultrasonic motor stator with tail fins and its excitation method. The main body of the stator is V-shaped, and the main body is a frame composed of thin plates. Both tails of the V-shaped frame are provided with thin-plate tail fins, and the V-shaped frame is connected to the thin-plate tail fins. A mounting hole is opened at the place, and the piezoelectric ceramic sheet is installed on the thick side of the V-shaped frame or the thick side of the thin plate empennage. The excitation method is: install the piezoelectric ceramic sheet on the thick sides of the V-shaped A piezoelectric ceramic sheet is installed on the thick side of the empennage, and an alternating current signal with a phase difference of 90 degrees is applied to the piezoelectric ceramic sheet on the V-shaped frame or thin plate empennage, which can excite a phase difference of 90 degrees along the Y-axis direction at the driving point. The vibration of the vibration and the vibration of the X-axis direction, so that the elliptical motion is synthesized at the driving point. If the phase difference of the excitation signals of the corresponding two piezoelectric ceramic sheets is changed, the elliptical motion of the driving point can be turned in the opposite direction, so that the stator can be driven in both directions. The stator of the invention has compact structure and reliable vibration effect.

Description

technical field [0001] The invention relates to an ultrasonic motor stator, in particular to a thin plate frame structure linear ultrasonic motor stator with tail fins and an excitation method thereof. Background technique [0002] The ultrasonic motor is a motor that uses the inverse piezoelectric effect of piezoelectric materials to convert electrical energy into mechanical energy of the stator, excites an elliptical motion at the drive foot end of the stator, and then converts the motor into rotation or linear motion of the moving parts through contact friction. Compared with traditional electromagnetic motors, ultrasonic motors have many unique advantages such as low-speed high-power output, no noise, flexible and compact structure, high energy density, and easy miniaturization. [0003] The stator is the core component of the ultrasonic motor. For a linear ultrasonic motor, the stator structure is mainly flat, and there are also a few slender cylindrical structures. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/12H02N2/14
CPCH02N2/003H02N2/12H02N2/14
Inventor 曲建俊刘晨东曲华杰张磊
Owner HARBIN INST OF TECH
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