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Single-phase-excitation in-plane vibration ultrasonic motor and single-phase excitation method thereof

An ultrasonic motor, single-phase technology, used in generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. Integration, can not meet the application requirements and other problems, to achieve the effect of easy processing, low cost, simple pre-pressure mechanism

Inactive Publication Date: 2018-02-27
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plate-shaped configuration and linear drive mode of these motors make them unable to meet the actual application requirements in some occasions.
In addition, in order to form the vibration of the particles on the stator driving surface along two mutually perpendicular directions, and then superimpose into the elliptical motion of the driving mover, the ultrasonic motor usually uses voltage excitation with a phase difference of 90° between the two phases, which makes the drive control circuit of the motor complicated. Difficult to miniaturize and integrate motors

Method used

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  • Single-phase-excitation in-plane vibration ultrasonic motor and single-phase excitation method thereof
  • Single-phase-excitation in-plane vibration ultrasonic motor and single-phase excitation method thereof
  • Single-phase-excitation in-plane vibration ultrasonic motor and single-phase excitation method thereof

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Effect test

Embodiment 1

[0028] The single-phase excitation type in-plane vibration ultrasonic motor includes a stator, a rotor 2 and a pre-pressure mechanism. The rotor 2 runs through the hollow stator and the mating end 7 of the stator, and the rotor 2 is pressed against the driving surface of the stator through the pre-pressure mechanism; the stator drives the rotor 2 rotates, the motion and torque of the motor are output through the output shaft 4, and the output shaft 4 runs through the entire stator 1. The pre-pressure mechanism includes two sets of disc springs 6 and clamps 5. The upper and lower axial surfaces of the rotor 2 are respectively provided with a disc spring 6 interspersed in the output shaft, and each disc spring 6 is fastened to the output shaft. The clamp 5 on the 4 realizes compressing the rotor 2. Specific as Image 6 shown. The stator of the motor has various structures, not limited to the polygonal structure in the figure. It mainly uses the deformation direction of one or ...

Embodiment 2

[0036] figure 2 Another construction method for the stator. The stator is composed of an octagonal metal base 1 and pasted piezoelectric ceramic sheets a22, piezoelectric ceramic sheets b23, piezoelectric ceramic sheets c24, and piezoelectric ceramic sheets d25. The polarization direction of the piezoelectric ceramic sheet is along the outer normal direction of the stator body, specifically as figure 2 indicated by the arrow in . The selected working mode of the stator is two second-order in-plane bending vibration modes, specifically as Figure 4 with Figure 5 shown. Since the working mode of the selected stator is the in-plane vibration mode, the figure 2 The stator in the machine is processed into a thin sheet.

[0037] for figure 2 In terms of the stator structure in the stator assembly, when the piezoelectric ceramic sheet b23 or piezoelectric ceramic sheet c24 in the stator assembly inputs a phase drive voltage signal through the rectangular plate electrode, ...

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Abstract

The invention discloses a single-phase-excitation in-plane vibration ultrasonic motor. The single-phase-excitation in-plane vibration ultrasonic motor comprises a stator and a rotor, wherein the stator is of a hollow and symmetrical structure, and is compounded through a polygonal metallic matrix and at least two piezoelectric ceramic pieces stuck on the outer surface of the polygonal metallic matrix, and the surfaces of the piezoelectric ceramic pieces are coated with electrodes evenly distributed in the thickness direction; the stator works in the resonance state, and the working mode of thestator comprises two second-order in-plane bending vibration modes with the certain included angle in space. The single-phase-excitation in-plane vibration ultrasonic motor has the advantages that the thickness is thin, a pre-pressure mechanism is simple, piezoelectric ceramics are easily processed, the cost is low, the controllability is good, the output displacement is large, driving voltage islow, and whole miniaturization is easily achieved; the single-phase-excitation in-plane vibration ultrasonic motor is particularly suitable for thinned-and-miniaturized special usage occasions such as the biological field, the medical field, the micro-machine field, the automatic control field, the optical lens field, the robot field and the aerospace defense-related science and technology field.

Description

technical field [0001] The invention belongs to the field of ultrasonic motors, and in particular relates to a novel in-plane vibration ultrasonic motor and a single-phase excitation method thereof. Background technique [0002] Due to the characteristics of compact structure, easy processing, low cost, simple modal excitation, easy miniaturization and high energy density, in-plane vibration ultrasonic motors have been widely used in precision drives and semiconductor industries. However, most of the in-plane vibration motors are linear motors with a rectangular plate structure. Among them, the most typical in-plane vibration ultrasonic motor is the longitudinal bending composite motor developed by Nanomotion. So far, longitudinal bending compound motors have been successfully applied to precision drive platforms. Chinese invention patent, application number: 200410101574.4 also proposed a method for constructing an in-plane vibrating linear motor. However, the plate-shape...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12
CPCH02N2/10H02N2/12
Inventor 李冲徐世周林方丽
Owner HENAN NORMAL UNIV