Design of high-efficiency electromagnetic energy harvester based on a rolling magnet

Ambient vibrations resulted from mechanical motions and body movements are ubiquitous in daily life, which contain substantial amount of energy that can be converted into electricity by electromagnetic conversion. However, most existing electromagnetic energy harvesters utilize sliding or rotating m...

Full description

Saved in:
Bibliographic Details
Main Authors: Zhang, L. B., Dai, H. L., Yang, Yaowen, Wang, L.
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Online Access:https://hdl.handle.net/10356/151534
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-151534
record_format dspace
spelling sg-ntu-dr.10356-1515342021-06-29T09:15:43Z Design of high-efficiency electromagnetic energy harvester based on a rolling magnet Zhang, L. B. Dai, H. L. Yang, Yaowen Wang, L. School of Civil and Environmental Engineering Engineering::Civil engineering Energy Harvesting Electromagnetic Ambient vibrations resulted from mechanical motions and body movements are ubiquitous in daily life, which contain substantial amount of energy that can be converted into electricity by electromagnetic conversion. However, most existing electromagnetic energy harvesters utilize sliding or rotating magnets cutting the coil to produce electric current. Here an energy harvester using a rolling magnet is designed and fabricated, which can significantly increase the magnetic flux rate when cutting the coil compared to that using a sliding magnet. Importantly, a friction effect is introduced to improve the energy harvesting performance for this design, the output average power has been further increased by 50%. Experimental results show that under a walking speed of 4 km/h, an average power of 0.5 mW can be produced. While in the experiments of hand shaking with a frequency of 3.1 Hz, an average power of 1.02 mW can be captured. It is observed that the electric energy harvested from one-minute hand shaking is able to operate a sensor with 1.1 V working voltage for about two minutes. The conducted experiments of energy harvesting from walking/running, hand shaking and cycling demonstrate great potential of the developed harvester in building up self-powered wearable sensing systems. The authors acknowledge the support provided by Fundamental Research Funds for the Central Universities, HUST (2017KFYXJJ135), Natural Science Foundation of Hubei Province (2017CFB429), and National Natural Science Foundation of China (No. 11602090). 2021-06-29T09:15:43Z 2021-06-29T09:15:43Z 2019 Journal Article Zhang, L. B., Dai, H. L., Yang, Y. & Wang, L. (2019). Design of high-efficiency electromagnetic energy harvester based on a rolling magnet. Energy Conversion and Management, 185, 202-210. https://dx.doi.org/10.1016/j.enconman.2019.01.089 0196-8904 https://hdl.handle.net/10356/151534 10.1016/j.enconman.2019.01.089 2-s2.0-85061536528 185 202 210 en Energy Conversion and Management © 2019 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Energy Harvesting
Electromagnetic
spellingShingle Engineering::Civil engineering
Energy Harvesting
Electromagnetic
Zhang, L. B.
Dai, H. L.
Yang, Yaowen
Wang, L.
Design of high-efficiency electromagnetic energy harvester based on a rolling magnet
description Ambient vibrations resulted from mechanical motions and body movements are ubiquitous in daily life, which contain substantial amount of energy that can be converted into electricity by electromagnetic conversion. However, most existing electromagnetic energy harvesters utilize sliding or rotating magnets cutting the coil to produce electric current. Here an energy harvester using a rolling magnet is designed and fabricated, which can significantly increase the magnetic flux rate when cutting the coil compared to that using a sliding magnet. Importantly, a friction effect is introduced to improve the energy harvesting performance for this design, the output average power has been further increased by 50%. Experimental results show that under a walking speed of 4 km/h, an average power of 0.5 mW can be produced. While in the experiments of hand shaking with a frequency of 3.1 Hz, an average power of 1.02 mW can be captured. It is observed that the electric energy harvested from one-minute hand shaking is able to operate a sensor with 1.1 V working voltage for about two minutes. The conducted experiments of energy harvesting from walking/running, hand shaking and cycling demonstrate great potential of the developed harvester in building up self-powered wearable sensing systems.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Zhang, L. B.
Dai, H. L.
Yang, Yaowen
Wang, L.
format Article
author Zhang, L. B.
Dai, H. L.
Yang, Yaowen
Wang, L.
author_sort Zhang, L. B.
title Design of high-efficiency electromagnetic energy harvester based on a rolling magnet
title_short Design of high-efficiency electromagnetic energy harvester based on a rolling magnet
title_full Design of high-efficiency electromagnetic energy harvester based on a rolling magnet
title_fullStr Design of high-efficiency electromagnetic energy harvester based on a rolling magnet
title_full_unstemmed Design of high-efficiency electromagnetic energy harvester based on a rolling magnet
title_sort design of high-efficiency electromagnetic energy harvester based on a rolling magnet
publishDate 2021
url https://hdl.handle.net/10356/151534
_version_ 1705151323989606400