发明名称 |
MAGNETOSTRICTIVE ACTUATOR |
摘要 |
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.
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申请公布号 |
US2005029878(A1) |
申请公布日期 |
2005.02.10 |
申请号 |
US20040913582 |
申请日期 |
2004.08.06 |
申请人 |
FLANAGAN GRAHAM;METHERINGHAM WILLIAM JOHN;JOHNSON DAVID;SMITH BRIAN DOUGLAS |
发明人 |
FLANAGAN GRAHAM;METHERINGHAM WILLIAM JOHN;JOHNSON DAVID;SMITH BRIAN DOUGLAS |
分类号 |
H04R15/00;H04R23/00;(IPC1-7):H02N2/00 |
主分类号 |
H04R15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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