Challenges in printing and shaping soft magnetic flux guides
File(s)
Accepted version
Author(s)
Wright, Steven W
Kiziroglou, Michail E
Yeatman, Eric M
Type
Conference Paper
Abstract
Coupling to sufficient magnetic flux is challenging for sensing, actuating and energy microsystems, due to scaling limitations. Soft magnetic materials can provide flux density concentration by their magnetization as well as by their geometry. High relative permeability (μr) ferrites can be challenging to integrate into microsystems and microfabrication processes, but materials of moderate μr may have similar performance in geometrical flux concentrators. In this paper, the flux concentration performance of commercial ferrite, custom moulded and 3D printing soft magnetic materials is characterized. Magnetization loop measurements at 300 Hz to 1 kHz demonstrate μr of 2.2, 36 and 520 for the printed, moulded and commercial materials respectively. In closed-loop inductive power line energy harvesting they demonstrate impedance matched average output power of 0.25 mW, 15 mW and 1.4 W respectively, at 24 A RMS, 1 kHz power line current. In open magnetic loop harvesting using H shaped flux guiding cores, an average harvesting power of 6μ W,0.12 mW and 0.16 mW was demonstrated respectively from a 10 A RMS, 800 Hz power line current. The results indicate that moderate μr materials can provide effective geometrical flux concentration for miniature magnetic sensors, actuators and energy harvesters.
Date Issued
2024-12-30
Date Acceptance
2024-11-01
Citation
2024 IEEE 23rd International Conference on Micro and Miniature Power Systems, Self-Powered Sensors and Energy Autonomous Devices (PowerMEMS), 2024, pp.243-246
Publisher
IEEE
Start Page
243
End Page
246
Journal / Book Title
2024 IEEE 23rd International Conference on Micro and Miniature Power Systems, Self-Powered Sensors and Energy Autonomous Devices (PowerMEMS)
Copyright Statement
© 2024 IEEE. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
License URL
Identifier
https://doi.org/10.1109/powermems63147.2024.10814325
Source
2024 IEEE 23rd International Conference on Micro and Miniature Power Systems, Self-Powered Sensors and Energy Autonomous Devices (PowerMEMS)
Publication Status
Published
Start Date
2024-11-18
Finish Date
2024-11-21
Coverage Spatial
Tonsberg, Norway