Magnetic flux guides by material extrusion
File(s)
Author(s)
Cañada, Jorge
Wright, Steven W
Kiziroglou, Michail E
Yeatman, Eric M
Velásquez‐García, Luis F
Type
Journal Article
Abstract
Additive fabrication of active materials with sub-millimeter resolution can improve the performance and expand the functionality of sensing, actuation, and transduction in microsystems. In particular, the integration of soft magnetic materials of customized 3D geometries that guide and focus magnetic flux can increase inductive coupling and interaction forces. In this paper, a magnetic material extrusion method is used to fabricate flux concentration structures of arbitrary shapes. A magnetic permeability of 42 is experimentally demonstrated. Ring and H-shape structures are used to evaluate their performance as inductive, power-line energy harvesters. An output power density of 6.4 µW g−1 is demonstrated by open-loop coupling to a 10 A, 500 Hz power line emulating an aircraft use case. The results are compared with similar ferrite and moulded material devices, which yield 17.3 and 2.4 µW g−1, respectively. In line with a simulation analysis, the experimental results show that materials with moderate magnetic permeability can provide competitive transduction performance, while offering unique customisation, accessibility, and design-to-prototype speed benefits. The proposed customisable magnetic flux-concentration approach provides a simple, effective, and accessible method for enhancing the performance of magnetic and inductive sensing, actuating, and energy transduction devices.
Date Issued
2026-02-27
Date Acceptance
2025-12-01
Citation
Advanced Science, 2026, 13 (12)
ISSN
2198-3844
Publisher
Wiley
Journal / Book Title
Advanced Science
Volume
13
Issue
12
Copyright Statement
© 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Publication Status
Published
Article Number
e17310
Date Publish Online
2025-12-19