A string-suspended and driven rotor for efficient ultra-low frequency mechanical energy harvesting
Fan, Kangqi1; Cai, Meiling1; Wang, Fei2; Tang, Lihua3; Liang, Junrui4; Wu, Yipeng5; Qu, Hengheng1; Tan, Qinxue1
AbstractThe abundant mechanical energy distributed in ambient environments features ultra-low frequency. Implementation of self-sustained low-power electronic systems is largely dependent on the efficient exploitation of the ubiquitous ultra-low frequency mechanical energy. This paper reports a fundamentally different approach for constructing high-output rotational energy harvesters on the basis of a novel string-suspended and driven rotor, which uses only two strings to suspend and actuate a rotor. Distinguished from the conventional energy harvesters that convert various mechanical motions to vibrations of a mechanical oscillator with high resonant frequency, the proposed approach converts vibrations or linear reciprocating motions to either rapid rotation motion or high-frequency small twisting vibration of a rotor, making the harvester well suited for harnessing ultra-low frequency mechanical motions. We demonstrate the superior performance of this approach by applying it to electromagnetic energy harvesting from ultra-low frequency vibrations and human body motions. Under a periodical excitation with amplitude of 23 mm, the fabricated electromagnetic energy harvester achieves 12.3 mW power with a matched resistive load (25 Omega) at 2.6 Hz. With human body motion as the energy source, the harvester can sustainably drive as well as charge various small electronic devices, manifesting the promising potential of the proposed approach for capturing ultra-low frequency mechanical energy as a practical power source.
KeywordEnergy harvesting Human motion Electromagnetic energy harvester Ultra-low frequency
Indexed ByEI ; SCI
Funding ProjectNatural Science Foundation of Shaanxi Province[2018JM5030]
WOS Research AreaThermodynamics ; Energy & Fuels ; Mechanics
WOS SubjectThermodynamics ; Energy & Fuels ; Mechanics
WOS IDWOS:000491213400051
EI Accession Number20192907195979
EI KeywordsElectric excitation ; Electromagnetic waves ; Energy efficiency ; Energy harvesting ; Natural frequencies ; Oscillistors
EI Classification NumberEnergy Conservation:525.2 ; Energy Conversion Issues:525.5 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electromagnetic Waves:711 ; Oscillators:713.2 ; Mechanics:931.1
Original Document TypeArticle
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorFan, Kangqi; Tang, Lihua
Affiliation1.Xidian Univ, Sch Mechanoelect Engn, Xian 710071, Shaanxi, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Univ Auckland, Dept Mech Engn, Auckland 1010, New Zealand
4.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China
5.Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Fan, Kangqi,Cai, Meiling,Wang, Fei,et al. A string-suspended and driven rotor for efficient ultra-low frequency mechanical energy harvesting[J]. ENERGY CONVERSION AND MANAGEMENT,2019,198.
APA Fan, Kangqi.,Cai, Meiling.,Wang, Fei.,Tang, Lihua.,Liang, Junrui.,...&Tan, Qinxue.(2019).A string-suspended and driven rotor for efficient ultra-low frequency mechanical energy harvesting.ENERGY CONVERSION AND MANAGEMENT,198.
MLA Fan, Kangqi,et al."A string-suspended and driven rotor for efficient ultra-low frequency mechanical energy harvesting".ENERGY CONVERSION AND MANAGEMENT 198(2019).
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