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Vibration Energy Harvester Based on Torsionally Oscillating Magnet

Most of the miniaturized electromagnetic vibrational energy harvesters (EVEHs) are based on oscillating proof mass suspended by several springs or a cantilever structure. Such structural feature limits the miniaturization of the device’s footprint. This paper presents an EVEH device based on a torsi...

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Autores principales: Wang, Xinyi, Li, Jiaxing, Zhou, Chenyuan, Tao, Kai, Qiao, Dayong, Li, Yunjia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8708768/
https://www.ncbi.nlm.nih.gov/pubmed/34945395
http://dx.doi.org/10.3390/mi12121545
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author Wang, Xinyi
Li, Jiaxing
Zhou, Chenyuan
Tao, Kai
Qiao, Dayong
Li, Yunjia
author_facet Wang, Xinyi
Li, Jiaxing
Zhou, Chenyuan
Tao, Kai
Qiao, Dayong
Li, Yunjia
author_sort Wang, Xinyi
collection PubMed
description Most of the miniaturized electromagnetic vibrational energy harvesters (EVEHs) are based on oscillating proof mass suspended by several springs or a cantilever structure. Such structural feature limits the miniaturization of the device’s footprint. This paper presents an EVEH device based on a torsional vibrating magnet over a stack of flexible planar coils. The torsional movement of the magnet is enabled by microfabricated silicon torsional springs, which effectively reduce the footprint of the device. With a size of 1 cm × 1 cm × 1.08 cm, the proposed EVEH is capable of generating an open-circuit peak-to-peak voltage of 169 mV and a power of 6.9 μW, under a sinusoidal excitation of ±0.5 g (g = 9.8 m/s(2)) and frequency of 96 Hz. At elevated acceleration levels, the maximum peak-to-peak output voltage is 222 mV under the acceleration of 7 g (±3.5 g).
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spelling pubmed-87087682021-12-25 Vibration Energy Harvester Based on Torsionally Oscillating Magnet Wang, Xinyi Li, Jiaxing Zhou, Chenyuan Tao, Kai Qiao, Dayong Li, Yunjia Micromachines (Basel) Article Most of the miniaturized electromagnetic vibrational energy harvesters (EVEHs) are based on oscillating proof mass suspended by several springs or a cantilever structure. Such structural feature limits the miniaturization of the device’s footprint. This paper presents an EVEH device based on a torsional vibrating magnet over a stack of flexible planar coils. The torsional movement of the magnet is enabled by microfabricated silicon torsional springs, which effectively reduce the footprint of the device. With a size of 1 cm × 1 cm × 1.08 cm, the proposed EVEH is capable of generating an open-circuit peak-to-peak voltage of 169 mV and a power of 6.9 μW, under a sinusoidal excitation of ±0.5 g (g = 9.8 m/s(2)) and frequency of 96 Hz. At elevated acceleration levels, the maximum peak-to-peak output voltage is 222 mV under the acceleration of 7 g (±3.5 g). MDPI 2021-12-12 /pmc/articles/PMC8708768/ /pubmed/34945395 http://dx.doi.org/10.3390/mi12121545 Text en © 2021 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
Wang, Xinyi
Li, Jiaxing
Zhou, Chenyuan
Tao, Kai
Qiao, Dayong
Li, Yunjia
Vibration Energy Harvester Based on Torsionally Oscillating Magnet
title Vibration Energy Harvester Based on Torsionally Oscillating Magnet
title_full Vibration Energy Harvester Based on Torsionally Oscillating Magnet
title_fullStr Vibration Energy Harvester Based on Torsionally Oscillating Magnet
title_full_unstemmed Vibration Energy Harvester Based on Torsionally Oscillating Magnet
title_short Vibration Energy Harvester Based on Torsionally Oscillating Magnet
title_sort vibration energy harvester based on torsionally oscillating magnet
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8708768/
https://www.ncbi.nlm.nih.gov/pubmed/34945395
http://dx.doi.org/10.3390/mi12121545
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