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Giant magnetostrictive material-based rocking head type micromotor

A giant magnetostrictive, shaking head type technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as low efficiency, achieve large output displacement, Easy miniaturization, low drive voltage effect

Active Publication Date: 2015-12-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetostrictive rods in the above drivers all work in a non-resonant state, so the efficiency is low

Method used

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  • Giant magnetostrictive material-based rocking head type micromotor
  • Giant magnetostrictive material-based rocking head type micromotor
  • Giant magnetostrictive material-based rocking head type micromotor

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The oscillating head micromotor based on giant magnetostrictive materials includes a stator, a rotor and a pre-pressure system, specifically as Figure 6 shown. The stator of the motor has a variety of structures, not limited to the structure in the figure. The magnetostrictive effect of the giant magnetostrictive material is mainly used to deform the giant magnetostrictive unit, thereby simultaneously exciting the two first-order bending vibration modes of the stator. state, so that the trajectory of the mass point on the driving end surface where the stator and the rotor are in contact is an ellipse, and the stator drives the rotor to rotate through friction.

[0049] figure 1 It is a kind of construction method of the stator, which is composed of a magnetostrictive body (giant magnetostrictive material) 2 and a metal base 1 (metal material). Among them, the magnetostrictive body 2 is magnetized along the axial direction. Under the action of an external magnetic fie...

Embodiment 2

[0058] The micromotor includes a stator, a rotor and a pre-pressure system, specifically as Figure 6 As shown, the stator structure is as figure 2 shown. figure 2 Among them, 3 is the piezoelectric material body (piezoelectric material), the arrow direction is the polarization direction of the piezoelectric material body, 1 is the metal matrix (metal material), 2 is the magnetostrictive body (giant magnetostrictive material), the arrow The direction is the magnetization direction of the magnetostrictive body. Under the action of an external magnetic field, due to the magnetostrictive effect of the giant magnetostrictive material, the stator deforms along the direction 1 ( image 3 shown), so that two first-order bending vibration modes of the stator along the x and y directions can be simultaneously excited. The superposition of the two vibrations forms the bending vibration of the stator cylinder, so that the movement track of the mass point on the driving end surface w...

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Abstract

The invention provides a giant magnetostrictive material-based rocking head type micromotor, which comprises a stator, a rotor and a precompression system, wherein the stator comprises a magnetic deformation body and a metal base body; a magnetostrictor body extends along the magnetization direction under the action of the applied magnetic field; two first-order bending vibration modes with a certain included angle in space are excited on the stator; the motion track of a mass point on a contact drive end surface of the stator and the rotor is an ellipse; the rotor runs through the hollow stator and is pressed on a drive end of the stator under the action of the precompression system; and the stator drives the rotor to rotate through friction. According to the giant magnetostrictive material-based rocking head type micromotor, wireless driving is achieved by external magnetic field excitation; microminiaturization is easy to achieve; and a piezoelectric material body is used for monitoring the running state of the motor in real time, and can also be used as a magnetoelectric conversion unit for achieving wireless energy supply and the like. The giant magnetostrictive material-based rocking head type micromotor is especially suitable for the occasions, such as the fields of medical diagnosis, robots and the like, which require accurate positioning.

Description

technical field [0001] The invention relates to a device in the application field of giant magnetostrictive materials, in particular to a shaking head external magnetically controlled micromotor based on giant magnetostrictive materials suitable for wireless driving. Background technique [0002] The oscillating head motor is an important type of piezoelectric motor. Generally, the oscillating head motor utilizes two symmetrical first-order bending vibration modes of the stator. The combination of these two vibrations makes the particle on the end face of the stator drive generate an elliptical motion trajectory, and then The rotor is driven to rotate by the friction between the stator and the rotor. Oscillating piezoelectric motors based on bending vibration modes have been a research hotspot in the field of micro-actuators in recent years due to their simple structure, convenient processing, low cost, light weight and small size. At present, some moving head micro-motors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00H02N2/02
CPCH02N2/003H02N2/0065H02N2/007H02N2/026
Inventor 鹿存跃李冲马艺馨
Owner SHANGHAI JIAO TONG UNIV
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