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Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester

With the rapid development of Internet of Things (IoT) and the popularity of wireless sensors, using internal permanent or rechargeable batteries as a power source will face a higher maintenance workload. Therefore, self-powered wireless sensors through environmental energy harvesting are becoming a...

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Autores principales: Sun, Feng, Dong, Runhong, Zhou, Ran, Xu, Fangchao, Mei, Xutao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9228856/
https://www.ncbi.nlm.nih.gov/pubmed/35744550
http://dx.doi.org/10.3390/mi13060936
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author Sun, Feng
Dong, Runhong
Zhou, Ran
Xu, Fangchao
Mei, Xutao
author_facet Sun, Feng
Dong, Runhong
Zhou, Ran
Xu, Fangchao
Mei, Xutao
author_sort Sun, Feng
collection PubMed
description With the rapid development of Internet of Things (IoT) and the popularity of wireless sensors, using internal permanent or rechargeable batteries as a power source will face a higher maintenance workload. Therefore, self-powered wireless sensors through environmental energy harvesting are becoming an important development trend. Among the many studies of energy harvesting, the research on rotational energy harvesting still has many shortcomings, such as rarely working effectively under low-frequency rotational motion or working in a narrow frequency band. In this article, a rotational magnetic couple piezoelectric energy harvester is proposed. Under the low-frequency excitation (<10 Hz) condition, the harvester can convert low-frequency rotational into high-frequency vibrational of the piezoelectric beam by frequency up-conversion, effectively increasing the working bandwidth (0.5–16 Hz) and improving the efficiency of low-speed rotational energy harvesting. In addition, when the excitation frequency is too high (>16 Hz), it can solve the condition that the piezoelectric beam cannot respond in time by frequency down-conversion. Therefore, the energy harvester still has a certain degree of energy harvesting ability (18–22 Hz and 29–31 Hz) under high-frequency conditions. Meanwhile, corresponding theoretical analyses and experimental verifications were carried out to investigate the dynamic characteristics of the harvester with different excitation and installation directions. The experimental results illustrate that the proposed energy harvester has a wider working bandwidth benefiting from the frequency up-conversion mechanism and frequency down-conversion mechanism. In addition, the forward beam will have a wider bandwidth than the inverse beam due to the softening effect. In addition, the maximum powers of the forward and inverse beams at 310 rpm (15.5 Hz) are 93.8 μW and 58.5 μW, respectively. The maximum powers of the two beams at 420 rpm (21 Hz) reached 177 μW and 85.2 μW, respectively. The self-powered requirement of micromechanical systems can be achieved. Furthermore, this study provides the theoretical and experimental basis for rotational energy harvesting.
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spelling pubmed-92288562022-06-25 Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester Sun, Feng Dong, Runhong Zhou, Ran Xu, Fangchao Mei, Xutao Micromachines (Basel) Article With the rapid development of Internet of Things (IoT) and the popularity of wireless sensors, using internal permanent or rechargeable batteries as a power source will face a higher maintenance workload. Therefore, self-powered wireless sensors through environmental energy harvesting are becoming an important development trend. Among the many studies of energy harvesting, the research on rotational energy harvesting still has many shortcomings, such as rarely working effectively under low-frequency rotational motion or working in a narrow frequency band. In this article, a rotational magnetic couple piezoelectric energy harvester is proposed. Under the low-frequency excitation (<10 Hz) condition, the harvester can convert low-frequency rotational into high-frequency vibrational of the piezoelectric beam by frequency up-conversion, effectively increasing the working bandwidth (0.5–16 Hz) and improving the efficiency of low-speed rotational energy harvesting. In addition, when the excitation frequency is too high (>16 Hz), it can solve the condition that the piezoelectric beam cannot respond in time by frequency down-conversion. Therefore, the energy harvester still has a certain degree of energy harvesting ability (18–22 Hz and 29–31 Hz) under high-frequency conditions. Meanwhile, corresponding theoretical analyses and experimental verifications were carried out to investigate the dynamic characteristics of the harvester with different excitation and installation directions. The experimental results illustrate that the proposed energy harvester has a wider working bandwidth benefiting from the frequency up-conversion mechanism and frequency down-conversion mechanism. In addition, the forward beam will have a wider bandwidth than the inverse beam due to the softening effect. In addition, the maximum powers of the forward and inverse beams at 310 rpm (15.5 Hz) are 93.8 μW and 58.5 μW, respectively. The maximum powers of the two beams at 420 rpm (21 Hz) reached 177 μW and 85.2 μW, respectively. The self-powered requirement of micromechanical systems can be achieved. Furthermore, this study provides the theoretical and experimental basis for rotational energy harvesting. MDPI 2022-06-12 /pmc/articles/PMC9228856/ /pubmed/35744550 http://dx.doi.org/10.3390/mi13060936 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sun, Feng
Dong, Runhong
Zhou, Ran
Xu, Fangchao
Mei, Xutao
Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester
title Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester
title_full Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester
title_fullStr Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester
title_full_unstemmed Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester
title_short Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester
title_sort theoretical and experimental investigation of a rotational magnetic couple piezoelectric energy harvester
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9228856/
https://www.ncbi.nlm.nih.gov/pubmed/35744550
http://dx.doi.org/10.3390/mi13060936
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