Magnetostrictive bending micro-actuator using iron-gallium alloy

Toshiyuki Ueno; Toshiro Higuchi

doi:10.1117/12.715878

20 April 2007 Magnetostrictive bending micro-actuator using iron gallium-alloy

Toshiyuki Ueno, Toshiro Higuchi

Proceedings Volume 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007; 65262J (2007) https://doi.org/10.1117/12.715878
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

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 (Fe_81.4Ga_18.6 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.

Citation Download Citation

Toshiyuki Ueno and Toshiro Higuchi "Magnetostrictive bending micro-actuator using iron gallium-alloy", Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65262J (20 April 2007); https://doi.org/10.1117/12.715878

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