Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Calculation method of maximum magnetization intensity externally generated by magnetostrictive material

A technology of magnetostrictive materials and calculation methods, applied in magnetization measurement, calculation, computer-aided design, etc., can solve the problems that cannot be used to describe the nonlinear relationship of giant magnetostrictive materials, difficult to obtain accurate values, and low precision , to achieve the best magnetization performance, accurate provision, and the effect of precise important parameters

Inactive Publication Date: 2017-12-01
GUANGDONG UNIV OF TECH
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The linear constitutive relationship of materials currently established is used to analyze and describe the intrinsic conversion relationship between magnetism and machine in materials, and can only be used in engineering applications with low precision. The established model can only reflect the material in a specific linear region. Coupling relationship, which cannot be used to describe the nonlinear relationship of giant magnetostrictive materials
[0003] Since the establishment of the magnetostrictive material model in the prior art is too simple, it is difficult to accurately value the important parameters in the magnetostrictive material device, and it is impossible to obtain the best application performance of the magnetostrictive material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calculation method of maximum magnetization intensity externally generated by magnetostrictive material
  • Calculation method of maximum magnetization intensity externally generated by magnetostrictive material
  • Calculation method of maximum magnetization intensity externally generated by magnetostrictive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0155] Taking the giant magnetostrictive rod composed of Terfenol-D material as an example to calculate the maximum magnetization intensity produced by the magnetostrictive material, the length of the giant magnetostrictive rod is 40mm and the diameter is 5mm.

[0156] The free energy equation is established by taking a single magnetic domain in a magnetostrictive material as the research object:

[0157] E=E k +E σ +E H Formula 1

[0158] In formula 1, E is the free energy;

[0159] E. k is the anisotropic energy of the magnetocrystal;

[0160] E. σ is the stress anisotropy;

[0161] E. H is the magnetization energy.

[0162] Formula 1 is expressed in the X coordinate system, and the X coordinate system is as follows figure 1 As shown, take the [100] crystal axis direction as the x axis, take the [010] crystal axis direction as the y axis, take the [001] crystal axis direction as the z axis, and the direction of the applied magnetic field and stress as the [110] cr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a calculation method of maximum magnetization intensity externally generated by a magnetostrictive material. The method includes: using a single magnetic domain in the magnetostrictive material as a research object to establish a nonlinear free energy equation; bringing a preset value of an externally applied magnetic field and a preset value of externally applied stress to the nonlinear free energy equation for solving; analyzing laws of influences of the externally applied magnetic field and stress on deflection of the magnetic domain according to a solving result; obtaining best values of the externally applied magnetic field and stress; and calculating the maximum magnetization intensity externally generated by the magnetostrictive material. Compared with the prior art, the method researches laws of the angle deflection of the magnetic domain in the magnetostrictive material through extremum solving for the nonlinear free energy equation of a single domain particle in the material, and then describes magnetization and magnetic-mechanical coupling characteristics of the material, obtains the best values of the externally applied magnetic field and stress, thus calculates the magnetization intensity externally generated by the magnetostrictive material, is high in accuracy, and can more precisely provide important parameters for a magnetostrictive material device.

Description

technical field [0001] The invention relates to the technical field of magnetostrictive materials, in particular to a method for calculating the maximum magnetization generated by a magnetostrictive material. Background technique [0002] The establishment and improvement of the magnetic energy coupling model of the magnetostrictive material machine has always been a hot and difficult point of research by domestic and foreign scholars and experts, and it is also a prerequisite for the application of broadband and high-performance devices that directly affect and restrict magnetostrictive materials. When the actuator based on the magnetostrictive material is working, it will be subjected to the double load coupling effect of the excitation magnetic field and the mechanical stress. Superposition greatly increases the difficulty of establishing material theory models. In engineering applications, the approximate linear piezoelectric-magnetic relationship is generally used to s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01R33/12
CPCG01R33/1215G06F30/20G06F2119/06
Inventor 王亚文严柏平
Owner GUANGDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com