Comparative study of electrical and switch-skipping mechanical switch for self-powered SSHI in medium coupled piezoelectric vibration energy harvesters

Asanuma, H; Sakamoto, K; Komatsuzaki, T; Iwata, Y

Comparative study of electrical and switch-skipping mechanical switch for self-powered SSHI in medium coupled piezoelectric vibration energy harvesters

Asanuma, H Sakamoto, K Komatsuzaki, T Iwata, Y

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Publication Type:: Journal Article
Citation:: Smart Materials and Structures, 2018, 27 (7)
Issue Date:: 2018-06-08

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Field	Value	Language
dc.contributor.author	Asanuma, H	en_US
dc.contributor.author	Sakamoto, K	en_US
dc.contributor.author	Komatsuzaki, T	en_US
dc.contributor.author	Iwata, Y	en_US
dc.date.issued	2018-06-08	en_US
dc.identifier.citation	Smart Materials and Structures, 2018, 27 (7)	en_US
dc.identifier.issn	0964-1726	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131272
dc.description.abstract	© 2018 IOP Publishing Ltd. To increase output power for piezoelectric vibration energy harvesters, considerable attention has recently been focused on a self-powered synchronized switch harvesting on inductor (SSHI) technique employing an electrical and mechanical switch. However, there are two technical issues: in a medium or highly coupled harvester, the piezoelectric coupling force, which increases as the SSHI's voltage increases, will reduce the harvester's displacement and the resulting output power, and there are few reports comparing the performance of electrical switch SSHI (ESS) and mechanical switch SSHI (MSS) that include consideration of the piezoelectric coupling force. We developed a simulation technique that allows us to evaluate the output power considering the piezoelectric coupling force, and investigated the performance of stopper-based MSS and ESS, both numerically and experimentally. The numerical investigation predicted the following: (1) the output power for the ESS is lower than that for the MSS at acceleration lower than 3.5 m s-2; and (2) intriguingly, the output power for the MSS continues to increase, whereas the peak-peak displacement remains constant. The experimental results showed behaviour similar to that of the numerical predictions. The results are attributed to the different switching strategies: the MSS turns on only when the harvester's displacement exceeds the gap distance, while the ESS turns on at every maximum/minimum displacement.	en_US
dc.relation.ispartof	Smart Materials and Structures	en_US
dc.relation.isbasedon	10.1088/1361-665X/aac4cc	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Materials	en_US
dc.title	Comparative study of electrical and switch-skipping mechanical switch for self-powered SSHI in medium coupled piezoelectric vibration energy harvesters	en_US
dc.type	Journal Article
utslib.citation.volume	7	en_US
utslib.citation.volume	27	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	030102 Electroanalytical Chemistry	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
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
utslib.copyright.status	closed_access	*
pubs.issue	7	en_US
pubs.publication-status	Published	en_US
pubs.volume	27	en_US

Abstract:

© 2018 IOP Publishing Ltd. To increase output power for piezoelectric vibration energy harvesters, considerable attention has recently been focused on a self-powered synchronized switch harvesting on inductor (SSHI) technique employing an electrical and mechanical switch. However, there are two technical issues: in a medium or highly coupled harvester, the piezoelectric coupling force, which increases as the SSHI's voltage increases, will reduce the harvester's displacement and the resulting output power, and there are few reports comparing the performance of electrical switch SSHI (ESS) and mechanical switch SSHI (MSS) that include consideration of the piezoelectric coupling force. We developed a simulation technique that allows us to evaluate the output power considering the piezoelectric coupling force, and investigated the performance of stopper-based MSS and ESS, both numerically and experimentally. The numerical investigation predicted the following: (1) the output power for the ESS is lower than that for the MSS at acceleration lower than 3.5 m s-2; and (2) intriguingly, the output power for the MSS continues to increase, whereas the peak-peak displacement remains constant. The experimental results showed behaviour similar to that of the numerical predictions. The results are attributed to the different switching strategies: the MSS turns on only when the harvester's displacement exceeds the gap distance, while the ESS turns on at every maximum/minimum displacement.

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http://hdl.handle.net/10453/131272