抄録
We investigate a bending actuator based on unimorph, lamination of Galfenol (Iron-gallium alloy) and non-magnetic material. The Galfenol U-shape yoke bonded with stainless plates (lamination) is wound coils, and iscomposed close magnetic loop with connected an iron plate. The magnetostriction in longitude direction is constrained by the stainless, thus, the lamination yields bending deformation with the current induced. The advantage of the actuator is simple, compact and ease of assembling including winding coil, and high tolerance against bending, tensileand impact. We machined the yoke from a plate of 1mm thickness of Galfenol of Research grade using ultra highprecision cutting technique. The prototype with lamination thickness of 1mm was observed the displacement 13 μm and 1st resonance 1.6 kHz, and the high bending (tensile) tolerance withstanding suspended weight of 500g.
