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Piezoelectric stick-slip linear motor with asymmetric rhombic amplifying mechanism and its excitation method

An amplifying mechanism, linear motor technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. problems such as the limitation of friction, the difficulty of comprehensive control of friction, etc., to achieve the effect of compact structure, improved mechanical output characteristics, and convenient control.

Active Publication Date: 2017-09-22
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems of the existing piezoelectric stick-slip linear motors due to the difficulty in comprehensive regulation of the friction between the stator and the mover, the mechanical output characteristics are limited, the sawtooth-like uneven motion output is generated, and the output performance is deteriorated, etc., the present invention discloses a Piezoelectric stick-slip linear motor with asymmetric rhombic amplifying mechanism and excitation method thereof

Method used

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  • Piezoelectric stick-slip linear motor with asymmetric rhombic amplifying mechanism and its excitation method
  • Piezoelectric stick-slip linear motor with asymmetric rhombic amplifying mechanism and its excitation method
  • Piezoelectric stick-slip linear motor with asymmetric rhombic amplifying mechanism and its excitation method

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine Figure 1~Figure 10 This embodiment will be described. This implementation mode provides a specific implementation scheme of a piezoelectric stick-slip linear motor with an asymmetric rhombic amplifying mechanism. The piezoelectric stick-slip linear motor with an asymmetric rhombic amplifying mechanism includes a pre-pressure adjusting device 1 , a stator 2 and a mover 3 .

[0025]The pre-pressure adjusting device 1 is composed of a lower supporting platform 1-1, a pre-compressing sliding platform 1-2 and a manual adjustment bolt 1-3, and the lower supporting platform 1-1 and the pre-compressing sliding platform 1- 2 can use No. 45 steel material. The lower supporting platform 1-1 is provided with a fixing screw 1-1-1, a fixing cage 1-1-2 and a locking screw 1-1-3, and by adjusting the locking screw 1-1-3, the The fixing of the preload slide table 1-2 prevents the preload slide table 1-2 from moving after loading. The lower ...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination Figure 11 This embodiment will be described. This implementation mode provides a specific implementation scheme of an excitation method for a piezoelectric stick-slip linear motor with an asymmetric rhombic amplifying mechanism. The excitation method of the piezoelectric stick-slip linear motor with an asymmetric rhombic amplifying mechanism is as follows.

[0029] The composite excitation electric signal used in the excitation method is compounded and superimposed on the sawtooth wave in the stator rapid deformation driving stage by the friction regulation wave, the friction regulation wave can be a sine wave, and the driving wave can be a sawtooth wave. Among them, the period of the sawtooth driving wave is T 1 , the excitation voltage amplitude is V 1 , the symmetry is D, and the period of the slight friction sinusoidal control wave is T 2 , the excitation voltage amplitude is V 2 , the period ratio of the sawtooth ...

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Abstract

The invention discloses a piezoelectric stick-slip linear motor equipped with an asymmetric rhombic amplifying mechanism and an excitation method for the piezoelectric stick-slip linear motor, and solves the problem that the output mechanical performance of the current piezoelectric stick-slip linear motor is limited caused by difficulty in comprehensive regulation and control on the friction force. The piezoelectric stick-slip linear motor comprises three parts: a pre-pressure regulating apparatus, a stator and a mover, wherein the asymmetric rhombic amplifying conversion mechanism of the stator has a micro-displacement amplifying function; side displacement can be generated by the asymmetric structure; meanwhile, the friction driving force is increased while the friction resistance is decreased; the friction regulation and control wave is coupled and overlapped to the sawtooth driving wave in the rapid deformation driving stage of the stator so as to reduce the friction resistance between the stator and the mover in the rapid deformation driving stage; and therefore, the comprehensive regulation and control on the friction force is realized, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is remarkably improved. The piezoelectric stick-slip linear motor has the characteristics of simple and compact structure, easy assembling, high precision, long journey and the like, and can be widely applied to the fields of precision optical instrument, semiconductor processing and other micro-nano precision driving and positioning technologies.

Description

technical field [0001] The invention relates to a piezoelectric stick-slip linear motor with an asymmetric diamond-shaped amplifying mechanism and an excitation method thereof, belonging to the technical field of micro-nano precision driving and positioning. Background technique [0002] Piezoelectric stick-slip linear motor is a kind of inverse piezoelectric effect based on piezoelectric elements. The stator (or vibrator) is excited by an asymmetrical electric signal to generate a small amplitude high-frequency vibration, which is realized by friction coupling between the stator and the mover. A micro-nano precision piezoelectric stick-slip linear motor with mechanical energy output. According to different driving principles, piezoelectric stick-slip linear motors are mainly divided into two categories: resonant piezoelectric motors (also called ultrasonic motors) and non-resonant piezoelectric motors (also called piezoelectric stick-slip motors). Compared with the resonan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/04H02N2/06
CPCH02N2/04H02N2/06
Inventor 程廷海林洁琼李恒禹王拓田丽雅
Owner CHANGCHUN UNIV OF TECH
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