Achieving high electric outputs from low-frequency motions through a double-string-spun rotor

Fan，Kangqi1; Xia，Pengwei1; Zhang，Yiwei1; Qu，Hengheng1; Liang，Geng1; Wang，Fei2; Zuo，Lei3

2021-06-16

10.1016/j.ymssp.2021.107648

MECHANICAL SYSTEMS AND SIGNAL PROCESSING   影响因子和分区

0888-3270

1096-1216

The pervasive low-frequency mechanical energy is important for realizing self-powered electronics, but its efficient exploitation is still a highly challenging task due to the mismatch between the motion frequencies and the working frequencies of already reported energy harvesters. To tackle this issue, we propose in this paper a new motion-conversion mechanism (which we name ‘double-string-spun rotor’) to transform low-frequency motions (mechanical vibrations and irregular human body motions) to uni-directional and high-speed rotation. Consisting of a rotatable shaft and a ratchet, the rotor structure first converts low-frequency motions to bi-directional rotation of the shaft through two strings and then drives the ratchet to do uni-directional rotation via curved plectra. The promising application of the rotor in capturing low-frequency mechanical energy is examined through an electromagnetic generator (harvester) constructed with the rotor, which generates 46 mW power when actuated by a crank-slider mechanism at 7 Hz. The generator has also been utilized to scavenge irregular human body motions and low-frequency vibrations engendered by daily jogging, and the collected energy allows the continuous work of various commercial electronics. This study provides a new strategy for efficiently exploiting ambient low-frequency motions and exhibits the high probability of realizing self-sustained electronics with the captured low-frequency mechanical energy.

Generator Human motion Low frequency Mechanical vibration

SCI ; EI

英语

其他

WOS:000625388600005

20210509856769

Electric generators

Electric Generators:705.2 ; Mechanics:931.1

ENGINEERING

2-s2.0-85100010733

Scopus

1.School of Mechano-Electronic Engineering,Xidian University,Xi'an,710071,China
2.School of Microelectronics,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Mechanical Engineering,Virginia Tech,Blacksburg,24061,United States

Fan，Kangqi,Xia，Pengwei,Zhang，Yiwei,et al. Achieving high electric outputs from low-frequency motions through a double-string-spun rotor[J]. MECHANICAL SYSTEMS AND SIGNAL PROCESSING,2021,155.

Fan，Kangqi.,Xia，Pengwei.,Zhang，Yiwei.,Qu，Hengheng.,Liang，Geng.,...&Zuo，Lei.(2021).Achieving high electric outputs from low-frequency motions through a double-string-spun rotor.MECHANICAL SYSTEMS AND SIGNAL PROCESSING,155.

Fan，Kangqi,et al."Achieving high electric outputs from low-frequency motions through a double-string-spun rotor".MECHANICAL SYSTEMS AND SIGNAL PROCESSING 155(2021).