Self-biased modular magnetostrictive driver and transducer

Details Self-biased modular magnetostrictive driver and transducer Self-biased modular magnetostrictive driver and transducer

H - Electricity

01

L

310/12, 349/68

H01L 41/12 (2006.01) B06B 1/06 (2006.01) B06B 1/08 (2006.01) H01L 41/20 (2006.01)

Patent

CA 1273672

Abstract of the Disclosure The drive modules of a magnetostrictive transducer are fabricated from interleaved permanent magnet disks (samarium cobalt) and high-strain, low-permeability magnetostrictive lanthanide alloy (Terfenol-D) disks to form a stack of such interleaved materials of substantially uniform magnetic field distribution in the stack. Two such stacks in side-by- side relationship provide a series-aiding magnetic circuit completed through high-permeability flux return pole pieces at their ends thereby providing a substantially uniform magnetic field distribution in the stack. Each stack has longitudinally-extending and electrically-insulated planar cuts and each flux return pole piece is a laminate of thin sheets of high-permeability electrically-insulated steel to reduce eddy current losses resulting from the AC field. The steel sheets are constrained by a nonmagnetic end-block into which the steel sheets are inserted and bonded.

537863

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