Permanent magnet biased magnetostrictive transducer

Details Permanent magnet biased magnetostrictive transducer Permanent magnet biased magnetostrictive transducer

H - Electricity

04

R

349/68

H04R 15/00 (2006.01) B06B 1/08 (2006.01)

Patent

CA 1277023

Abstract of the Disclosure A transducer which uses paramagnetic magnetostrictive rods or bars, e.g., compositions of the lanthanide series of elements such as Tb 0.3 DV0.7 Fe2, has the bars biased with a lengthwise flux by a permanent magnet, e.g. samarium-cobalt, of high resistance to demagnetization by the alternating field applied to the bars by alternating current in a coil surrounding the bar. The magnet is outside the coil to reduce the ac field to which it is subjected. Uniformity of flux density along the length of the bars is enhanced by having adjacent ends of the bars subjected to like-polarity poles of the permanent magnets associated with each bar.

508210

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