期刊
SMART MATERIALS AND STRUCTURES
卷 24, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/24/6/065029
关键词
vibration energy harvester; roly-poly; electromagnetic power generation
资金
- Ewha Global Top 5 Grant of Ewha Womans University
- Converging Research Center Program - Ministry of Science, ICT and Future Planning, Korea [2013K000355]
- Pioneer Research Center Program through the National Research Foundation of Korea - Ministry of Science, ICT & Future Planning [2010-0019313]
- National Research Foundation of Korea [2010-0019453] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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(rms) and an output power of 9.03 mu W have been obtained in response to a 20 Hz sinusoidal vibration at 3 g acceleration.
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