A two-degree-of-freedom string-driven rotor for efficient energy harvesting from ultra-low frequency excitations

Tan, Q; Fan, K; Tao, K; Zhao, L; Cai, M

A two-degree-of-freedom string-driven rotor for efficient energy harvesting from ultra-low frequency excitations

Tan, Q Fan, K Tao, K Zhao, L

Cai, M

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Energy, 2020, 196, pp. 117107-117107
Issue Date:: 2020-02

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Field	Value	Language
dc.contributor.author	Tan, Q
dc.contributor.author	Fan, K
dc.contributor.author	Tao, K
dc.contributor.author	Zhao, L https://orcid.org/0000-0002-6229-4871
dc.contributor.author	Cai, M
dc.date.accessioned	2020-10-26T03:37:48Z
dc.date.available	2020-10-26T03:37:48Z
dc.date.issued	2020-02
dc.identifier.citation	Energy, 2020, 196, pp. 117107-117107
dc.identifier.issn	0360-5442
dc.identifier.issn	1873-6785
dc.identifier.uri	http://hdl.handle.net/10453/143524
dc.description.abstract	© 2020 Elsevier Ltd The aim of this study is to report a two-degree-of-freedom (2-DOF) string-driven rotor to convert ultra-low frequency vibrations to high-speed rotation motion of a rotor, which enables the efficient exploitation of ultra-low frequency mechanical energy. The proposed rotor structure consists of a disk-shaped rotor, a spring and two pieces of string, featuring extremely simple configuration. Based on the proposed rotor, we designed an electromagnetic energy harvester (EMEH) to show the feasibility of utilizing the rotor to achieve improved energy harvesting performance. Experimental results showed that the fabricated harvester with various structural parameters could provide two peak power outputs and generate up to 9.4 mW power when actuated at 3 Hz by a displacement excitation with an amplitude of 8 mm. With the electric power converted from the treadmill vibration by the EMEH, a hygrothermograph could be continuously driven to work with full functionality. Under the manual operation, the harvester could also sustainably charge some portable electronic gadgets. The results of this study exhibit the promising potential of the proposed rotor in efficiently harvesting the ambient ultra-low frequency energy.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Energy
dc.relation.isbasedon	10.1016/j.energy.2020.117107
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0913 Mechanical Engineering, 0914 Resources Engineering and Extractive Metallurgy, 0915 Interdisciplinary Engineering
dc.subject.classification	Energy
dc.title	A two-degree-of-freedom string-driven rotor for efficient energy harvesting from ultra-low frequency excitations
dc.type	Journal Article
utslib.citation.volume	196
utslib.for	0913 Mechanical Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	true
dc.date.updated	2020-10-26T03:37:44Z
pubs.publication-status	Published
pubs.volume	196

Abstract:

© 2020 Elsevier Ltd The aim of this study is to report a two-degree-of-freedom (2-DOF) string-driven rotor to convert ultra-low frequency vibrations to high-speed rotation motion of a rotor, which enables the efficient exploitation of ultra-low frequency mechanical energy. The proposed rotor structure consists of a disk-shaped rotor, a spring and two pieces of string, featuring extremely simple configuration. Based on the proposed rotor, we designed an electromagnetic energy harvester (EMEH) to show the feasibility of utilizing the rotor to achieve improved energy harvesting performance. Experimental results showed that the fabricated harvester with various structural parameters could provide two peak power outputs and generate up to 9.4 mW power when actuated at 3 Hz by a displacement excitation with an amplitude of 8 mm. With the electric power converted from the treadmill vibration by the EMEH, a hygrothermograph could be continuously driven to work with full functionality. Under the manual operation, the harvester could also sustainably charge some portable electronic gadgets. The results of this study exhibit the promising potential of the proposed rotor in efficiently harvesting the ambient ultra-low frequency energy.

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http://hdl.handle.net/10453/143524