步行能量采集器中磁致伸缩材料的机–磁耦合特性研究  

Magneto-Magnetic Coupling Characteristics of Magnetostrictive Materials in Walking Energy Collector

作　　者：王亚文[1] 谷爱昱[1] 严柏平 雒浪 Wang Ya-wen;Gu Ai-yu;Yan Bai-ping;Luo Lang(School of Automation,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《广东工业大学学报》2018年第4期25-31,共7页Journal of Guangdong University of Technology

基　　金：国家自然科学基金资助项目(220413156)

摘　　要：针对步行能量采集器中磁致伸缩材料的机–磁耦合特性,提出了一种磁致伸缩材料机–磁耦合特性的研究方法,通过观察磁畴角度偏转的规律,研究应力和磁场载荷同时作用下的超磁致伸缩材料的机–磁耦合特性.发现外加磁场增加有利于磁畴的偏转和跃迁,而应力各向异性能不利于超磁致伸缩材料磁化的进行,使超磁致伸缩材料的磁化更加困难.依据以上结论选择最佳的外加磁场和应力的取值,并且计算磁致伸缩材料对外产生的磁化强度,该磁化强度具有更高的效率.In order to provide the parameter basis for the design of the walking energy collector, a method is proposed to study the coupling characteristics of the magnetic actuator of the magnetostrictive material. By observing the law of the angle deflection of the magnetic field, the magnetic coupling characteristics of the magnetostrictive material is studied, the best external magnetic field and the value of stress selected, and the external magnetization produced by the magnetostrictive material calculated. It is found that the increase of external magnetic field is beneficial to the deflection and transition of magnetic domain. However, the stress anisotropy can be detrimental to the magnetization of the giant magnetostrictive material, making the magnetization of the magnetostrictive material more difficult.

关 键 词：磁致伸缩 磁畴 磁场 应力 磁化强度 

分 类 号：TM619[电气工程—电力系统及自动化]