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OPERATION OF MAGNETOSTRICTIVE APPARATUS

  • US 3,753,058 A
  • Filed: 12/16/1971
  • Issued: 08/14/1973
  • Est. Priority Date: 06/22/1970
  • Status: Expired due to Term
First Claim
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1. A process for magnetostrictively converting electrical power to vibratory mechanical power exerted along a desired longitudinal axis of mechanical power output in a magnetostrictive core and for altering the resonant frequency of the core comprising applying two mutually transverse electromagnetic fields to a core containing bilinear magnetostrictive material characterized by a substantial delta-E effect and cyclically fluctuating the flux density of at least one of the two electromagnetic fields to magnetize the core with a cyclically varying resultant magnetic field having an angularly oscillating axis of magnetization oscillating within an angular range of up to 90* from, and not crossing, the axis of desired power output and characterizing the core with a first resonant frequency, to thereby magnetostrictively vibrate the core longitudinally, and then electrically changing the flux density of at least one of the two applied fields to change the average intensity of the cyclically varying resultant magnetic field and thereby alter the resonant frequency of the core and characterize the core with a second resonant frequency.

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