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A fan-shaped linear ultrasonic motor based on the principle of continuous horn

A linear ultrasonic motor and horn technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems of low utilization of stator space and achieve structural Simple, clear blessing point, high-efficiency effect

Inactive Publication Date: 2016-05-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stator of the above-mentioned motor is only composed of two Langevin oscillators, and the space utilization rate of the stator is low

Method used

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  • A fan-shaped linear ultrasonic motor based on the principle of continuous horn
  • A fan-shaped linear ultrasonic motor based on the principle of continuous horn
  • A fan-shaped linear ultrasonic motor based on the principle of continuous horn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A fan-shaped linear ultrasonic motor based on the principle of continuous horn in this embodiment is as follows: figure 2 , 4 As shown, the linear ultrasonic motor of this embodiment, because its Langevin vibrator is bonded by the vibrator substrate and the piezoelectric ceramic sheet, it is called a chip-type sector motor, and the stator of the motor is composed of 2n(n> 1) Two Langevin oscillators intersect at a certain angle to form a fan-shaped structure. Considering the principles of simple design and easy processing, four Langevin oscillators are used in the design of this embodiment, and the Langevin oscillators are spaced at the same angle. Open; the Langevin vibrator includes a vibrator base and two piezoelectric ceramic sheets, the vibrator base includes a rear end as a straight rod and a front end as a continuously variable cross-section rod, and the rear end and front end The interface of the vibrator base is a continuous section, the front end is in a sta...

Embodiment 2

[0028] The excitation signal loading method of this embodiment is the same as that of this embodiment 1, and the difference between this embodiment and embodiment 1 lies in that the piezoelectric ceramic polarization effect on which the operating mechanism of the motor depends is different. Option 1 utilizes piezoceramic d 31 effect, Scheme 2 utilizes piezoelectric ceramic d 33 effect. Therefore, the difference in its structure is: figure 1 ,3 As shown, the Langevin vibrator includes a vibrator base, four piezoelectric ceramic sheets and two electrode metal sheets, and each two piezoelectric ceramic sheets and one electrode metal sheet form a group, respectively placed on the vibrator base. On both sides of the clamping piece, and each electrode metal sheet is sandwiched between two piezoelectric ceramic sheets; the front end of the Langevin vibrator is connected to the electrode metal sheet, piezoelectric ceramic sheet, and flexible clamping piece through bolts It is assem...

Embodiment 3

[0031] The difference between this embodiment and Embodiments 1 and 2 is that the excitation signal loading method of this embodiment is different from that of Embodiments 1 and 2, and its structure adopts the structure of Embodiment 1, such as figure 2 , 4 As shown, the piezoelectric vibrators of the stator are divided into two groups, the two Langevin vibrators on the outside are divided into one group, and the two Langevin vibrators on the inner side are divided into one group. For the two outer Langevin vibrators, the polarization direction of the piezoelectric ceramic sheet of one of the Langevin oscillators is opposite to the polarization direction of the piezoelectric ceramic sheet of the other Langevin oscillator. Simultaneously excite the two outer Langevin vibrators with the same sinusoidal signal, so that the mass point on the driving foot makes horizontal reciprocating motion. Use a certain phase difference with the above sinusoidal signal ( ) The other sinusoi...

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Abstract

The invention relates to a sector linear ultrasonic motor based on a continuous amplitude-change pole principle and belongs to the technical field of ultrasonic motors. A stator of the motor is in a fan-shaped structure which is formed by crossing of 2n(n>1) Lanvgein vibrators in a certain angle, each of the Lanvgein vibrators comprises a vibrator matrix and a piezoelectric ceramic piece, front end portions of Lanvgein vibrators are flexibly hinged into a whole to form a driving foot, rear end portions of Lanvgein vibrators are separated in a fan shape and are connected through flexible arced segments, and rear end portions of two Lanvgein vibrators on the outer side are connected with a fixed end with a round through-hole through flexible arced segments. The sector linear ultrasonic motor is high in space utilization rate and capable of increasing the energy density and the output force of the stator.

Description

technical field [0001] The invention relates to a fan-shaped linear ultrasonic motor based on the principle of a continuous horn, and belongs to the technical field of ultrasonic motors. Background technique [0002] The linear ultrasonic motor is a new type of micro motor developed rapidly in the 1980s. It uses the inverse piezoelectric effect of the piezoelectric element and the ultrasonic vibration of the elastic body. Through the friction between the stator and the mover, the elastic The micro-vibration of the body is converted into the macroscopic linear (rotational) motion of the mover, which directly pushes the load. It has the advantages of compact structure, high torque at low speed, fast response, high positioning accuracy and electromagnetic compatibility. It has broad application prospects in aerospace, weapon equipment and precision drive fields. At present, the development of domestic linear ultrasonic motor is very fast. On the China Patent Network, there a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 姚志远江超
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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