Energy harvesting with magneto-mechano-electric harvester for AC circular magnetic fields

Abstract

As the industry on Internet of Things continues to expand, the demand for sustainable energy solutions to power numerous sensors and devices increases. One promising approach is energy harvesting from stray magnetic fields. In this paper, we investigated an energy harvesting with a magneto-mechano-electric (MME) energy harvester, designed for circular magnetic fields. Magnetic simulation using 3D finite element method yields optimum design for the operation at a frequency, 60 Hz. Under the influence of a 5.39 G AC circular magnetic field, the energy harvester successfully harvested energy at a frequency of 60 Hz, and operating with a maximum power of 1.92 mW and a power density of 25.2 mW/cm3. Additionally, the performance has been enhanced by placing the magnetic flux concentrator parallel and even perpendicular to the piezoelectric sheet. This study underlines the necessity for further research on the structural design of MME harvesters in environments with various types of stray magnetic fields. © 2025