Rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor and composite excitation method thereof

A linear motor, driving technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problem of zigzag-like uneven motion output and the difficulty of comprehensive control of friction , limited mechanical output characteristics, etc., to achieve the effect of improving mechanical output characteristics, reducing displacement back-off rate, and improving output efficiency

CN105827143AActive Publication Date: 2016-08-03CHANGCHUN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-08-03

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Abstract

The invention provides a rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor and a composite excitation method thereof to solve the problem that in an existing piezoelectric stick-slip linear motor, the mechanical output property is limited due to the fact that comprehensive regulation on friction force is difficult. The rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor is composed of an oblique-wedge stator, a preloading device, a mounting support and a rotor; the oblique-wedge stator adopts asymmetrical hinges of a wedged structure, lateral displacement is generated through an oblique-wedge rhombus motion converter and the ununiform axial rigidity distribution characteristic of a stator drive foot, the friction drive force is increased, and the friction resistance is decreased; meanwhile, friction regulation waves are overlapped into sawtooth drive waves in the rapid deformation stage of the stator, comprehensive regulation on the friction force is achieved, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is significantly promoted. The rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor has the advantages of being simple in structure, high in precision, large in stroke and the like and has the good application prospect in the fields of micro-nano precise driving and positioning such as machining of precise medical instruments, optical precise instruments and semiconductors.
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Description

technical field

[0001] The invention relates to a rhombus oblique wedge type orthogonal drive piezoelectric stick-slip linear motor and a compound excitation method thereof, belonging to the technical field of micro-nano precision drive and positioning. Background technique

[0002] Piezoelectric stick-slip linear motor is a kind of piezoelectric stick-slip linear motor that uses the inverse piezoelectric effect of piezoelectric elements to excite the vibrator (or stator) to generate micro-vibration under the excitation of an asymmetric electrical signal, and realizes mechanical energy output through the frictional coupling between the vibrator and the mover. precision micro-nano actuators. According to different driving working 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 wi...

Examples

specific Embodiment approach 1

[0023] Specific implementation mode one: combine Figure 1~Figure 9 This embodiment will be described. This embodiment provides a specific implementation of a diamond-shaped wedge-type orthogonal drive piezoelectric stick-slip linear motor. The rhomboid wedge-shaped orthogonal drive piezoelectric stick-slip linear motor consists of a wedge-shaped stator 1 , a preloading device 2 , a mounting support 3 and a mover 4 .

[0024] The wedge-shaped stator 1 includes a wedge-shaped rhombic motion converter 1-1, a piezoelectric stack 1-2, a preload bolt 1-3 and an adjusting gasket 1-4; the wedge-shaped rhombic motion converter 1- 1 An asymmetrical hinge with a wedge-shaped structure, the wedge-shaped rhombic motion converter 1-1 can be made of 5052, 6061 or 7075 aluminum alloy, and the wedge-shaped rhombic motion converter 1-1 is provided with light holes for fixed installation 1-1-1, the wedge type rhombic motion converter 1-1 is fastened to the upper surface of the upper rectangul...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination Figure 10 The figures illustrate the present embodiment. This implementation mode provides a specific implementation scheme of a compound excitation method for a diamond-shaped wedge-type orthogonally driven piezoelectric stick-slip linear motor. The composite excitation method of the diamond wedge type orthogonal drive type piezoelectric stick-slip linear motor is as follows.

[0029] The composite excitation electrical signal used in the composite excitation method is compositely superimposed on the sawtooth drive wave in the rapid deformation stage of the stator by the friction control wave, the drive wave is a sawtooth wave, and the friction control wave is a sine wave. Specifically, the composite excitation electrical signal used in the composite excitation method is compositely superimposed on the sawtooth drive wave in the rapid deformation stage of the stator by the micro-amplitude friction sine control wave and th...