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Proceedings Paper

Magnetostrictive bending micro-actuator using iron-gallium alloy
Author(s): Toshiyuki Ueno; Toshiro Higuchi
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Paper Abstract

We investigate a micro bending actuator based on unimorph, lamination of Galfenol (Iron-gallium alloy) and non-magnetic material. Galfenol C-shape yoke bonded with stainless plates (lamination) is wound coils, and is composed close magnetic loop with connected an iron plate. The magnetostriction in longitude direction is constrained by the stainless, thus, the laminations yield bending deformation with the current flowing. The advantage of the actuator is simple, compact and ease of assembling including winding coil, and high tolerance against bending, tensile and impact. We machined the yoke from a plate of 1mm thickness of polycrystalline Galfenol (Fe81.4Ga18.6 Research grade) using ultra high precision cutting technique. The prototype, thickness of 1mm and length of 10mm, was observed the displacement 13&mgr;m and 1st resonance at 1.6 kHz, and the high bending (tensile) tolerance withstanding suspended weight of 500g.

Paper Details

Date Published: 20 April 2007
PDF: 8 pages
Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65262J (20 April 2007); doi: 10.1117/12.715878
Show Author Affiliations
Toshiyuki Ueno, The Univ. of Tokyo (Japan)
Toshiro Higuchi, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 6526:
Behavior and Mechanics of Multifunctional and Composite Materials 2007
Marcelo J. Dapino, Editor(s)

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