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Self-sensing driver based on magnetostrictive material

A technology of magnetostrictive materials and magnetostrictive rods, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the single drive or sensing function, structure Not compact, no integration and other problems, to achieve the effect of improving driving accuracy and sensing efficiency, improving detection sensitivity, and improving compactness

Active Publication Date: 2019-03-19
伶机(上海)驱动技术中心(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the magnetostrictive drivers or sensors proposed in these patent applications can only realize a single driving or sensing function, without integrating these two functions, the structure is not compact, and often needs to occupy a larger space

Method used

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  • Self-sensing driver based on magnetostrictive material
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  • Self-sensing driver based on magnetostrictive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 As shown, the driving part is mainly composed of a driving body wound with a driving coil, wherein the driving body is mainly composed of a magnetostrictive rod; the sensing body of the sensing part is mainly made of a rectangular frame-shaped magnetostrictive material, Coils are wound on the left and right sides, one side is the excitation coil, and the other side is the induction coil. The end where the sensing body collides with the driving body is provided with a semicircular protrusion. The function of the semicircle protrusion is to ensure the driving The force exerted by the body on the sensing body is applied along the axial direction to avoid bending moment.

[0057] Input the exciting high-frequency small current Ie to the exciting coil, and the induction coil outputs the induced voltage V under the action of exciting high-frequency small current Ie 1 ; Input the driving current I to the driving coil D , the driving body elongates and hits t...

Embodiment 2

[0059] Such as figure 2 As shown, the driving part is mainly composed of a driving body wound with a driving coil, wherein the driving body is mainly composed of a magnetostrictive cylinder; the sensing body of the sensing part is mainly composed of a magnetostrictive rod, and the sensing body It is built in the cylinder of the driving body, wherein the induction coil is wound on the sensing body, and the driving coil of the driving part also constitutes the excitation coil of the sensing part.

[0060] Input the drive current I to the drive coil D The superimposed excitation high-frequency small current Ie, the induction coil outputs the induced voltage V under the action of the excitation current 1 , the driver is driving the current I D Under the action of elongation, it hits the sensing body, and the sensing body is subjected to stress to produce the Villari effect, and the magnetic field of the sensing body changes, so that the induced voltage output by the induction c...

Embodiment 3

[0063] Such as image 3 As shown, the driving body of the driving part and the sensing body of the sensing part include the same magnetostrictive rod, coils arranged radially inside and outside are wound on the magnetostrictive rod, the driving coil is wound on the outside, and the excitation coil is wound on one end of the inside. coil, and the other end of the inner side is wound with an induction coil.

[0064] Input the excitation high-frequency small current Ie to the induction excitation coil, and the induction coil outputs the induction voltage V under the action of the excitation current 1 , input the driving current I to the driving coil D , the magnetostrictive rod at the driving current I D Under the action of elongation, the Villari effect is generated after elongation, and the magnetic field changes, so that the induced voltage output by the induction coil becomes V 2 , by measuring V(δ)=V 1 -V 2 The displacement and force of the driving part are detected.

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Abstract

The invention provides a self-sensing driver based on a magnetostrictive material. The self-sensing driver comprises a driving part and a sensing part. The driving part comprises a driving coil and adriving body. The sensing part comprises an excitation coil, an induction coil and a sensing body. The driving body is mainly made of the magnetostrictive material. The driving body generates a magnetostrictive effect under the action of a driving signal. The driving body is elongated or shortened, so that the driving part outputs displacement and force. The sensing body is mainly made of the magnetostrictive material. The induction coil outputs an induction signal V1 under the action of an excitation signal. After the sensing part is subjected to the impact from the driving part, the magneticfield of the sensing body changes, and the induction signal output by the induction coil of the sensing part is changed to V2. The displacement and force of the driving part are detected by measuringthe signal change V output by the induction coil. According to the invention, the functions of the driver and a sensor can be realized at the same time, and the structure compactness, the driving precision and the sensing efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of drivers and sensors, in particular to a self-sensing driver based on magnetostrictive materials. Background technique [0002] The magnetostrictive effect refers to the reversible change of the geometric size of the magnetic material due to the change of the external magnetic field during the magnetization process. Magnetostrictive materials will produce physical strain under the action of an external magnetic field, and at the same time, their physical parameters such as piezoelectric coefficient, Young's modulus and magnetic permeability will change accordingly. When a magnetostrictive material is subjected to an external force, its magnetization curve will change with the stress. This phenomenon is called the Villari effect, also known as the magnetostrictive inverse effect. Designing drivers based on the magnetostrictive effect of magnetostrictive materials and designing sensors based on other effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00
CPCH02N2/001H02N2/0075
Inventor 杨斌堂刘鲁楠杨诣坤
Owner 伶机(上海)驱动技术中心(有限合伙)
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