东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (10): 1456-1460.DOI: -

• 机械工程 • 上一篇    下一篇

考虑介电常数影响的GMA内部磁场特性分析

李东1，袁惠群1，李智军2，李莹3   

  1. (1.东北大学理学院，辽宁沈阳110819；2.东北大学机械工程与自动化学院，辽宁沈阳110819；3.辽宁营口职业技术学院，辽宁营口115000)
  • 收稿日期:2013-04-03 修回日期:2013-04-03 出版日期:2013-10-15 发布日期:2013-05-24
  • 通讯作者: 李东
  • 作者简介:李东(1982-)，男，辽宁葫芦岛人，东北大学讲师，博士；袁惠群(1954-)，男，河北石家庄人，东北大学教授，博士生导师.
  • 基金资助:
    教育部高等学校博士学科点专项科研基金资助项目(20120042120031)；中央高校基本科研业务费专项资金资助项目(N120305001)；国家自然科学基金资助项目(11304033).

Inner Magnetic Field Characteristics of Giant Magnetostrictive Actuator Considering Permittivity Effects

LI Dong1， YUAN Huiqun1， LI Zhijun2， LI Ying3   

  1. 1. School of Sciences， Northeastern University， Shenyang 110819， China; 2. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 3. Yingkou College of Vocational Techniology， Yingkou 115000， China.
  • Received:2013-04-03 Revised:2013-04-03 Online:2013-10-15 Published:2013-05-24
  • Contact: YUAN Huiqun
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摘要： 以Maxwell’s方程为基础，结合超磁致伸缩材料压磁方程，建立了考虑介电常数、预压应力等参数的超磁致伸缩材料内部磁场径向分布模型，并对其进行了理论分析和数值仿真.讨论了介电常数、预压应力、激励频率等参数对材料内部磁场分布及滞回特性的影响.结果表明，超磁致伸缩材料径向内部磁场分布具有明显的集肤效应和滞回特性；受电导率与介电常数共同影响，材料的磁场分布出现了双峰现象；沿磁致伸缩材料半径增大方向，外激励磁场与材料内部磁场的滞回特性逐渐减弱，磁场损耗随之降低；随着预压应力的增大，材料内部的集肤效应逐渐减小.

关键词: 超磁致伸缩微致动器, 介电常数, 双峰, 内部磁场, 集肤效应, 滞回

Abstract: Based on the Maxwell’s equation， the inner magnetic field radial distribution model of giant magnetostrictive actuator was built by combining with piezomagnetic equations， in which the permittivity， compressive prestress of the material were introduced. The theoretical analysis and numerical simulation of the model were done， and the influences of the material characteristic parameters on the material inner magnetic field and hysteresis characteristics were discussed. The results showed that the inner magnetic field radial distribution of giant magnetostrictive material (GMM) has obvious skin effect and hysteresis characteristics. Under the effects of conductivity and permittivity， the phenomenon of dualpeak is found in magnetic field distribution of GMM. Along with the radius direction of GMM， the hysteresis characteristics between excitation magnetic field and inner magnetic field gradually become weak， and the magnetic loss decreases. The skin effect of GMM decreases with the increase of compressive prestress.

Key words: giant magnetostrictive actuator, permittivity, dualpeak, inner magnetic field, skin effect, hysteresis

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