[1]王志华,吴丝竹,姚 涛,等.电磁式两自由度高效振动能量采集技术研究[J].燕山大学学报,2020,44(2):157-163.[doi:10.3969/j.issn.1007-791X.2020.02.007]
 WANG Zhihua,WU Sizhu,YAO Tao,et al.Research on two-degree-of-freedom electromagnetic high-efficiency vibration energy acquisition technology[J].Journal of YanShan University,2020,44(2):157-163.[doi:10.3969/j.issn.1007-791X.2020.02.007]
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电磁式两自由度高效振动能量采集技术研究
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《燕山大学学报》[ISSN:1007-791X/CN:13-1219/N]

卷:
44
期数:
2020年第2期
页码:
157-163
栏目:
电气工程
出版日期:
2020-03-31

文章信息/Info

Title:
Research on two-degree-of-freedom electromagnetic high-efficiency vibration energy acquisition technology
文章编号:
1007-791X(2020)02-0157-07
作者:
王志华12*吴丝竹12姚 涛3吕殿利12张惠娟12
1.河北工业大学 省部共建电工装备可靠性与智能化国家重点实验室,天津 300130;
2.河北工业大学 河北省电磁场与电器可靠性重点实验室,天津 300130;
3.河北工业大学 机械工程学院,天津 300130
Author(s):
WANG Zhihua12WU Sizhu12YAO Tao3LU Dianli12ZHANG Huijuan12
1.State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;
2.Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin 300130,China; 
3.School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,China
关键词:
振动能量采集两自由度磁场电动势
Keywords:
vibration energy harvesting two-degree-of-freedom magnetic field electromotive force
分类号:
TM313
DOI:
10.3969/j.issn.1007-791X.2020.02.007
文献标志码:
A
摘要:
振动能量广泛存在,将其收集起来可以为用电设备供电。为提高振动能量的采集效率,本文提出一种新型振动能量采集装置,利用弹簧和单摆的两自由度模型,可将外界的单向振动转换为摆的摆动,避免由往复式直线运动惯性而造成的机械能损失,其中摆上嵌入永磁体作为动子。基于拉格朗日方程建立该装置的两自由度振动模型,再根据摆的角度和电磁感应定律建立输出电动势模型,其中磁场利用有限元法计算。基于模型的仿真结果表明,在幅值20 mm、频率10 Hz的正弦振动激励下小车的水平位移放大了3倍,动子最大摆动角度接近80°。将该装置在振动台上进行测试,输入激励为斯柯达轿车的市区公路振动加速度谱,测得的电动势平均有效值为8.47 V,其平均输出功率约为594 mW,可满足手机等电子设备的供电需求。
Abstract:
It is meaningful to collect vibration energy which is widespread for powering electrical equipment.A novel twodegreeoffreedom vibration harvester is presented to improve the energy harvesting efficiency.The external oneway vibration excitation can be converted into a pendulum swing.Therefore,it can avoid the loss of mechanical energy caused by the inertia of the reciprocating linear motion.Here,magnets are embedded in the pendulum as a mover.The harvester can be modeled as a twodegreeoffreedom mechanical system on the basis of Lagrange Theorem.The output electromotive force (EMF) can be calculated by Faraday Law and the angular displacement of the pendulum.And the magnetic field is solved by finite element method.The simulation results under sinusoidal excitation with amplitude of 20 mm and frequency of 10 Hz indicate that the horizontal vibration displacement of the cart is amplified by 3 times and the maximum swing angle of the mover is close to 80°.A prototype is fabricated accordingly,and is tested on the vibration generator.The input excitation is the vibration acceleration spectrum of the urban road of the Skoda car.The test result is that the effective value of EMF is 8.47 V,and the average output power is 594 mW.And it can meet the power needs of mobile phones and other electronic devices.

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备注/Memo

备注/Memo:
收稿日期:2018-12-01        责任编辑:王建青
基金项目:国家自然科学基金资助项目(51775166);河北省引进留学人员资助项目(CL201708);天津市自然科学基金资助项目(18JCYBJC87100)
作者简介:*王志华(1982-),男,河南安阳人,博士,副教授,主要研究方向为新能源发电技术和柔性传感器技术,Email:wangzhihua@hebut.edu.cn
更新日期/Last Update: 2020-04-22