Electromagnetic Energy Harvester with Inertial Rotary Structure for Human Motion Application at Ultra-Low Frequency
Luo,Anxin1,2,3,4; Zhang,Yulong1; Xu,Weihan1; Lu,Yan3,4; Wang,Fei1
Source PublicationProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
AbstractThis paper reports a small-scale electromagnetic energy harvester with inertial rotary structure, which can convert linear motion to high-speed rotation and keeps rotating inertially. With a single compression, the rotation speed of rotor is estimated as high as 3500 rpm and it can rotate inertially as long as 50 s. The energy conversion efficiency (from rotor's kinetic energy to electric energy) during this process is 92.4%. Therefore, the device can efficiently harvest energy from ultra-low frequency (<1Hz) vibration. During the test, RMS output power of about 11 mW and 6.5 mW can be achieved under external vibration frequency of 0.84 Hz and 0.1 Hz, respectively. Finally, the energy harvester is mounted under shoes to harvest energy from human motion. Average power of 85 mW can be harvested from running at a speed of 9 km/h.
KeywordHuman Motion Rotational Energy Harvester Ultra-low-frequency
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Document TypeConference paper
CollectionUniversity of Macau
Corresponding AuthorWang,Fei
Affiliation1.School of Microelectronics,Southern University of Science and Technology (SUSTech),Shenzhen,China
2.Department of Electrical and Electronic Engineering,SUSTech,Shenzhen,China
3.State Key Laboratory of AMS-VLSI,Institute of Microelectronics,University of Macau (UM),Macao
4.Department of Electrical and Computer Engineering,FST,UM,Macao
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Luo,Anxin,Zhang,Yulong,Xu,Weihan,et al. Electromagnetic Energy Harvester with Inertial Rotary Structure for Human Motion Application at Ultra-Low Frequency[C],2020:536-539.
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