双稳态磁致伸缩能量采集器的动态特性  

Dynamic Characteristics of Bistable Magnetostrictive Energy Harvester

作　　者：付美真 曹淑瑛[1] 瞿林飞 郑加驹[1] 王博文[1] FU Mei-zhen;CAO Shu-ying;QU Lin-fei;ZHENG Jia-ju;WANG Bo-wen(Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability,Hebei University of Technology, Tianjin 300130, China)

机构地区：[1]河北工业大学电磁场与电器可靠性省部共建重点实验室,天津300130

出　　处：《电工电气》2017年第2期13-17,26,共6页Electrotechnics Electric

基　　金：国家自然科学基金项目(51171057);河北省自然科学基金项目(E2016202034);河北省高等学校科学技术研究项目(ZD2016004);河北省高等学校创新团队领军人才培育计划资助项目(LJRC003)

摘　　要：介绍了利用非线性来提高磁致伸缩能量采集系统效率的原理,建立了双稳态磁致伸缩能量采集器的集中参数模型,给出了两磁体之间的磁力数学表达式并验证了其正确性。分析了磁体之间的距离对系统特性的影响,结果表明:在外部非线性磁力的作用以及合适的磁体间距下,磁致伸缩悬臂梁会构成一个双稳态系统;相同激励幅值下,通过改变激励频率和磁体间距形成双稳态特性,可提高能量的采集效率。Introduction was made to the principle using the nonlinear to improve the efficiency of the magnetostrictive energy harvesting system. This paper established a lumped parameter model of bi-stable magnetostrictive energy harvester, gave the magnetic force mathematical expressions between two magnetic bodies and verified their correctness. This paper analyzed the impacts of the distance between the magnets on the system characteristics. The results show that in the nonlinear effect of external magnetic and suitable magnet spacing, themagnetostrictive cantilever would constitute a bi-stable system, and under the same excitation amplitude, the excitation frequency and magnet spacing were changed to form bi-stable state characteristic, which could improve the efficiency of energy harvesting.

关 键 词：Galfenol悬臂梁 振动能量采集 磁力 磁机电耦合 

分 类 号：TM619[电气工程—电力系统及自动化]