Rotational electromagnetic energy harvester for human motion application at low frequency

被引：124

作者：

Zhang, Yulong ^{[1
]}

Luo, Anxin ^{[1
,2
,3
]}

Wang, Yifan ^{[1
]}

Dai, Xiangtian ^{[1
]}

Lu, Yan ^{[2
,3
]}

Wang, Fei ^{[1
]}

机构：

[1] Southern Univ Sci & Technol, Sch Microelect, Shenzhen 518055, Peoples R China

[2] Univ Macau, Inst Microelect, State Key Lab AMS VLSI, Macau 999078, Peoples R China

[3] UM, FST, Dept Elect & Comp Engn, Macau 999078, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2020年 / 116卷 / 05期

关键词：

Energy harvesting - Microelectronics;

D O I：

10.1063/1.5142575

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A rotational electromagnetic energy harvester is designed to collect the mechanical energy of human motion at a low frequency. Linear motion can be converted to high speed rotation with an inertial system, which is mainly composed of a twist driving structure and a ratchet-clutch structure. When the twist rod is compressed by a footstep, the ratchet can keep rotating for about 20 s inertially, and an overall energy of 85.2 mJ can be harvested. The peak power output can reach 32.2 mW and a root mean square power of 7.7 mW is achieved. The maximum speed of the ratchet would be as high as 3700 revolutions per minute. When driven by the human footstep at a frequency of 1 Hz, an electronic hygrothermograph and 70 light-emitting diodes (LEDs) could be easily powered, which demonstrates the promising application of self-powered microelectronic devices.

引用

页数：5

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