Patent Number: 8,823,221

Title: Optimized galfenol-type magnetostrictive actuator

Abstract: An apparatus and a method for optimizing a Galfenol-type magnetostriction actuator. The method and apparatus includes an elongated Galfenol-type magnetostrictive bar, first coil and a second coil, orthogonal to the first coil, with the coils arranged and activated to optimize expansion and contraction in the bar. According to the apparatus and the method, the first coil pre-aligns the magnetic moments of the bar into a desired crystallographic orientation that allows for maximum expansion or contraction when under the influence of the magnetic field of the second coil.

Inventors: Teter; Joseph P (Darnestown, MD)

Assignee: The United States of America as represented by the Secretary of the Navy

International Classification: H02N 2/00 (20060101)

Expiration Date: 9/02/12018