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Volume 38 Issue 12
Dec.  2012
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Journal of Beijing University of Aeronautics and Astronautics  > 2012  >  38(12): 1682-1685.
Yang Yuanfei, Zhang Tianli, Jiang Chengbaoet al. Novel closed magnetic circuit with permanent magnet biased for giant magnetostrictive actuator[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(12): 1682-1685. (in Chinese)
Citation: Yang Yuanfei, Zhang Tianli, Jiang Chengbaoet al. Novel closed magnetic circuit with permanent magnet biased for giant magnetostrictive actuator[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(12): 1682-1685. (in Chinese)
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Novel closed magnetic circuit with permanent magnet biased for giant magnetostrictive actuator

  • School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 30 Sep 2011
  • Publish Date: 30 Dec 2012
    Abstract
  • The magnetic circuit of giant magnetostrictive actuator (GMA) was analysed and optimized with finite element software ANSYS. According to the design goals of high homogeneity of magnetic field and low magnetic flux leakage, a novel magnetic circuit biased by the combination of built-in permanent magnets was proposed in the base of compensation principle of dual-permanent magnets with contrary polarity. Magnetic field along the direction of the length of giant magnetostrictive rod was homogeneous, while well-closed magnetic circuits were informed in both biased magnetic field and driving magnetic field. According to the results from ANSYS analysis, the unevenness of the bias magnetic field and driving magnetic field is 3.51% and 8.73% respectively, which are less than 10%. The total magnetic leakage in the specified location (7 cm from the GMA) is 30.4 A/m , meeting the standard of practical application(<80 A/m).

     

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