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No.3(pp.73-106)

Home > Issues > Volume 4 (1999) > No.3(pp.73-106)

Under Water Sonar Transducer Using Terfenol-D Magnetostrictive Material

Journal of Magnetics, Volume 4, Number 3, 30 Sep 1999, Pages 98-101

Derac Son(Department of Physics, Han Nam University), Yuk Cho(Department of Physics, Han Nam University)

Abstract

In this work we htave constructed an under water sonar transducer using Terfenol-D rod employing open magnetic circuit. Normally Sonar transducer using Terfenol-D was designed under closed magnetic flux return path, and permanent magnet for dc bias marnetic field, but high magnetic field should be applied to the transducer coil for high sound power and it brings temperature increase inside of the transducer. To improve this heat dissipation problem, we have designed an open magnetic circuit type transducer and we can get 200 dB (re. 1 µPa @ 1m) sound power for the input power of 650 VA.

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