A frequency up-converted electromagnetic energy harvester using human hand-shaking

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

物理学;能源学

Halim, M.A.^1 ; Park, J.Y.^1

Micro/Nano Devices and Packaging Lab., Department of Electronic Engineering, Kwangwoon University, 447-1 Wolgye-dong, Nowon-gu, Seoul 139-701, Korea, Republic of^1

关键词: Energy Harvester;    Human hands;    Low-frequency;    Matched load;    Peak power;    Portable device;    Relative motion;    Top surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012119/pdf
DOI  :  10.1088/1742-6596/476/1/012119

来源: IOP

【 摘 要 】

We present a frequency up-converted electromagnetic (EM) energy harvester that is capable of powering various portable devices and systems by hand-shaking. It consists of a freely movable ball to impact periodically (at low frequency) on the parabolic top surface of a mass of a cantilever beam allowing it to vibrate at higher (resonant) frequency. Relative motion between a magnet attached to the cantilever and a coil induces voltage. A prototype of the energy harvester has been fabricated and characterized by applying vibration from handshaking. The frequency and acceleration of the applied hand-shaking vibration has been experimentally found to be 4.6 Hz and 2g, respectively. With an optimum distance between magnet and coil, a maximum 672 mV peak-peak open circuit voltage of 370 Hz frequency and a maximum 413μW peak power delivered to an 85Ω matched load resistance have been obtained, respectively.