Low Frequency Vibration Energy Harvester Using Spherical Permanent Magnet with Non-uniform Mass Distribution

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Choi, Y.^1 ; Ju, S.^1 ; Chae, S.H.^1 ; Jun, S.^1 ; Park, S.M.^1 ; Lee, S.^1 ; Lee, H.W.^2 ; Ji, C.-H.^1

Department of Electronics Engineering, Ewha Womans University, Seoul, Korea, Republic of^1

Department of Neurology, Ewha Womans University School of Medicine, Seoul, Korea, Republic of^2

关键词: Center of mass;    Energy Harvester;    External vibrations;    Fabricated device;    Low-frequency vibration;    Magnet assembly;    Mass distribution;    Proof of concept;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012123/pdf
DOI  :  10.1088/1742-6596/476/1/012123

来源: IOP

【 摘 要 】

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.