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A new calculation method for the number of radial slots of a Terfenol rod

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Abstract

Terfenol is an ideal choice for medium to high power low frequency sonar. It can offer the transducer designer higher strain, higher power density, but the designer must be aware of the eddy current. To enhance efficiency of the barrel-stave transducer powered by a Terfenol rod, radial slots rather than laminations were used to control eddy currents in the Terfenol drive rod, and the effectiveness and the number of these slots were studied experimentally and calculated by finite element modeling. Based on the characteristic of vortex path,a new simple geometrical method to calculate the number of the radial slots of a Terfenol rod at the operating frequency is put forward in this paper. Moreover, the calculated results are in good agreement with those of using the finite element method (FEM) for the slotted Terfenol rod given by the literature. The method will save much cost to design Terfenol rod transducers.

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Authors and Affiliations

  1. Applied Acoustics Institute, Shaanxi Normal University, Xi’an, 710062, China

    XiPing He

  2. School of Science, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Pin Zhang

Authors
  1. XiPing He
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  2. Pin Zhang
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Correspondence to XiPing He.

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He, X., Zhang, P. A new calculation method for the number of radial slots of a Terfenol rod. Sci. China Ser. E-Technol. Sci. 52, 336–338 (2009). https://doi.org/10.1007/s11431-008-0184-8

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  • DOI: https://doi.org/10.1007/s11431-008-0184-8

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