A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy

In this paper, a magnetically coupled electromagnetic energy harvester (MCEEH) is proposed for harvesting human body kinetic energy. The proposed MCEEH mainly consists of a pair of spring-connected magnets, coils, and a free-moving magnet. Specifically, the interaction force between the magnets is r...

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Autores principales:	Xiang Li, Jinpeng Meng, Chongqiu Yang, Huirong Zhang, Leian Zhang, Rujun Song
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	vibration energy harvesting electromagnetic energy harvester magnetic coupling human body kinetic energy Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/04f2845cd0354b55a9983f01a4ba2e6e
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spelling	oai:doaj.org-article:04f2845cd0354b55a9983f01a4ba2e6e2021-11-25T18:22:55ZA Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy10.3390/mi121113002072-666Xhttps://doaj.org/article/04f2845cd0354b55a9983f01a4ba2e6e2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1300https://doaj.org/toc/2072-666XIn this paper, a magnetically coupled electromagnetic energy harvester (MCEEH) is proposed for harvesting human body kinetic energy. The proposed MCEEH mainly consists of a pair of spring-connected magnets, coils, and a free-moving magnet. Specifically, the interaction force between the magnets is repulsive. The main feature of this structure is the use of a magnetic-spring structure to weaken the hardening response caused by the repulsive force. The magnetic coupling method enables the energy harvester system to harvest energy efficiently at low frequency. The MCEEH is experimentally investigated for improving energy harvesting efficiency. Under harmonic excitation with an acceleration of 0.5 g, the MCEEH reaches resonance frequency at 8.8 Hz and the maximum output power of the three coils are 5.2 mW, 2.8 mW, and 2.5 mW, respectively. In the case of hand-shaking excitation, the generator can obtain the maximum voltage of 0.6 V under the excitation acceleration of 0.2 g and the excitation frequency of 3.4 Hz. Additionally, a maximum instantaneous power can be obtained of about 26 mW from the human body’s kinetic energy.Xiang LiJinpeng MengChongqiu YangHuirong ZhangLeian ZhangRujun SongMDPI AGarticlevibration energy harvestingelectromagnetic energy harvestermagnetic couplinghuman body kinetic energyMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1300, p 1300 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	vibration energy harvesting electromagnetic energy harvester magnetic coupling human body kinetic energy Mechanical engineering and machinery TJ1-1570
spellingShingle	vibration energy harvesting electromagnetic energy harvester magnetic coupling human body kinetic energy Mechanical engineering and machinery TJ1-1570 Xiang Li Jinpeng Meng Chongqiu Yang Huirong Zhang Leian Zhang Rujun Song A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy
description	In this paper, a magnetically coupled electromagnetic energy harvester (MCEEH) is proposed for harvesting human body kinetic energy. The proposed MCEEH mainly consists of a pair of spring-connected magnets, coils, and a free-moving magnet. Specifically, the interaction force between the magnets is repulsive. The main feature of this structure is the use of a magnetic-spring structure to weaken the hardening response caused by the repulsive force. The magnetic coupling method enables the energy harvester system to harvest energy efficiently at low frequency. The MCEEH is experimentally investigated for improving energy harvesting efficiency. Under harmonic excitation with an acceleration of 0.5 g, the MCEEH reaches resonance frequency at 8.8 Hz and the maximum output power of the three coils are 5.2 mW, 2.8 mW, and 2.5 mW, respectively. In the case of hand-shaking excitation, the generator can obtain the maximum voltage of 0.6 V under the excitation acceleration of 0.2 g and the excitation frequency of 3.4 Hz. Additionally, a maximum instantaneous power can be obtained of about 26 mW from the human body’s kinetic energy.
format	article
author	Xiang Li Jinpeng Meng Chongqiu Yang Huirong Zhang Leian Zhang Rujun Song
author_facet	Xiang Li Jinpeng Meng Chongqiu Yang Huirong Zhang Leian Zhang Rujun Song
author_sort	Xiang Li
title	A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy
title_short	A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy
title_full	A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy
title_fullStr	A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy
title_full_unstemmed	A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy
title_sort	magnetically coupled electromagnetic energy harvester with low operating frequency for human body kinetic energy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/04f2845cd0354b55a9983f01a4ba2e6e
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A Magnetically Coupled Electromagnetic Energy Harvester with Low Operating Frequency for Human Body Kinetic Energy

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