Low-frequency vibration energy harvester using a spherical permanent magnet with controlled mass distribution
- 주제(키워드) electromagnetic power generation , roly-poly , vibration energy harvester
- 등재 SCIE, SCOPUS
- 발행기관 Institute of Physics Publishing
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000115848
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/0964-1726/24/6/065029
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
This paper presents a vibration energy harvester using a springless spherical permanent magnet with a non-uniform mass distribution as a proof mass. The magnet has been designed to have the center of mass below the geometrical center, which generates a roly-poly-like motion in response to external vibrations and maintains the upright position. Utilizing this roly-poly-like magnet, proof-of-concept electromagnetic energy harvesters have been fabricated, tested and analyzed. An analytical model which explains the motion of the magnet assembly and resulting output voltage has been developed by finite element analysis of the magnetic field distribution and motion analysis of the magnet assembly. With the fabricated device, a maximum open-circuit voltage of 48.85 mV<inf>rms</inf> and an output power of 9.03 μW have been obtained in response to a 20 Hz sinusoidal vibration at 3 g acceleration. © 2015 IOP Publishing Ltd.
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