Magnetostrictive actuator

Details Magnetostrictive actuator Magnetostrictive actuator

2005-05-10

2005-05-10

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Reciprocating

C310S012060, C381S117000

Reexamination Certificate

active

06891286

ABSTRACT:
A magnetostrictive actuator comprises a rod of giant magnetostrictive material, biasing permanent magnets arranged at each end thereof and coaxially therewith so as to pass a magnetic field through the rod. An energizing electromagnetic coil is connected to an energizer so as to superimpose on the magnetic field passing through the rod an alternating magnetic field to cause variation in the length of the rod in response thereto. The permanent magnets are each in the form of a disc having a cross-sectional area substantially greater than that of the rod and are spaced from the ends of the rods by material of low magnetic permeability. The magnetic field in the rod is thereby substantially linear along the length thereof.

REFERENCES:
patent: 2437270 (1948-03-01), Peek, Jr.
patent: 5451821 (1995-09-01), Teter et al.
patent: 5739601 (1998-04-01), Tsodikov
patent: 6294849 (2001-09-01), Teter

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