Low frequency vibration energy harvester using spherical permanent magnet with non-uniform mass distribution

Y. Choi, S. Ju, S. H. Chae, S. Jun, S. M. Park, S. Lee, H. W. Lee, C. H. Ji

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

We present a non-resonant vibration energy harvesting device using springless spherical permanent magnet with non-uniform mass distribution as a proof mass. The magnet has its center-of-mass below the geometrical center, which generates a roly-poly-like motion in response to external vibrations. Two different types of magnet assemblies with different center-of-mass position have been fabricated and tested. Using the roly-poly-like magnets, proof-of-concept electromagnetic energy harvesters have been fabricated and tested. Moreover, effect of ferrofluid as a lubricant has been tested with the fabricated energy harvester. Maximum open-circuit voltage of 154.4mV and output power of 4.53μW have been obtained at 3g vibration at 12Hz with the fabricated device.

Original languageEnglish
Article number012123
JournalJournal of Physics: Conference Series
Volume476
Issue number1
DOIs
StatePublished - 2013
Event13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, PowerMEMS 2013 - London, United Kingdom
Duration: 3 Dec 20136 Dec 2013

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