A wideband magnetic energy harvester

Abstract

A wideband magnetic energy harvester is proposed by using a number of multiferroic composite fibers of different lengths which are connected in parallel or series. The structural theory is employed to characterize the magnetoelectroelastic behavior of the fibers. A global circuit analysis is then performed. It is shown that such a structure of energy harvester is capable of collecting the ambient magnetic energy over a wide frequency range.

A magneto-mechano-electric coupling equivalent circuit of piezoelectric bimorph/magnets composite cantilever

“…Magnetoelectric (ME) effect is known as a polarization response to an applied magnetic field H or, conversely, a magnetization response to an applied electric field E. 1-4 ME composites, i.e., composite materials with ME effect, have recently attracted growing attention due to their giant ME effect and potential applications as multifunctional devices such as sensors, 5-7 energy harvester, [8][9][10][11] and tunable inductors. [12][13][14] Traditionally, the ME effect in composite materials of magnetostrictive and piezoelectric phases results from the strainmediated coupling interaction between the magnetostrictive effect in the magnetic phase and the piezoelectric effect in the piezoelectric one.…”

Wideband Electromagnetic Energy Harvesting from a Rotating Wheel

“…Possible disadvantages of this approach are that the maximum power is too small to power a TPMS, and the suitable vibration frequency is too high for a rotating wheel. Other researchers have attempted to develop wide-band structures to achieve high-efficiency energy-scavenging devices (Marinkovic & Koser, 2009;Zhang & Chen, 2010). (Stanton et al, 2009) validated a nonlinear energy harvester capable of bidirectional hysteresis.…”

Magnetic levitation-based electromagnetic energy harvesting: a semi-analytical non-linear model for energy transduction

“…When dominant excitations are known a priori in a constrained range, the harvesters’ characteristics can be optimized prior to fabrication using accurate models. For unknown, broadband and time-varying vibration spectra, new tunable mechanisms and broadband harvesting designs have been proposed 8 9 10 11 12 13 14 . However, these harvesters are usually complex and their use is often impractical due to dimensional constraints.…”