Design and fabrication of a new micro-power scaled electromagnetic harvester

Year 2019, Volume: 3 Issue: 2, 51 - 66, 30.06.2019

Busra Mutlu Erol Kurt , Nicu Bizon , Jose Manuel Lopez Guede

https://doi.org/10.30521/jes.554900

Cited By: 2

Abstract

In the present study,
a new micro-power scaled electromagnetic (EM) harvester is designed and fabricated.
The device has an innovative magnetic flux varying mechanism with two
cylindrical Nb magnets and a central core moving inside the magnets back and
forth. The system harvest electricity from the linear oscillations by the help
of a spring attached at the bottom part of the core. The device requires only
one spring and a second linear-laminated core closes the flux outside of the
magnets in order to lower the reluctance of the system. The device is 6 cm in
length and 2.4 cm in width in cylindrical geometry as a compact and stable
geometry. The experimental verifications have proven that it can generate up to
U = 7.76 mV output voltage depending
on the oscillation frequency. The maximal output power has been measured as P= 32 mW for 44 Hz frequency with the resistive load RL
= 0.2 Ohm. The power density p = 1.17
mW/cm3 has been obtained,
experimentally.

Keywords

Electromagnetic harvester, Power, Flux, Core

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