Energy harvesting with magneto-mechano-electric harvester for AC circular magnetic fields
Dongpyo Seo, Byungro Kim, Minjeong Ha, Seung Ho Han, Seungha Yoon, B. K. Cho
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/cm 3 . 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. Potential application of MME harvesters for circular magnetic fields in military drones. Experimental setup for the MME harvester under circular AC magnetic field (Left) and 3D FEM simulation results for circular magnetic field distribution produced by the coil (Right). • Innovative Energy Harvesting Design for circular magnetic field from power cable: Introduction of a magneto-mechano-electric (MME) harvester specifically optimized for AC circular magnetic fields. • Sustainable IoT Power Solution : Utilization of ambient AC magnetic fields from power cables for powering IoT devices, advancing sustainable energy technologies. • Superior Performance Metrics : Achieves a power density of 25.2 mW/cm³ under a 5.39 G magnetic field at 60 Hz, on par with or exceeding magnetic field unidirectional designs. • Efficiency Improvements by concentrating magnetic flux: Demonstrates over 20% efficiency enhancement through the use of magnetic flux concentrators. • Versatility in Application : Highlights the harvester's adaptability and potential in diverse operational environments.