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Theoretical analysis of novel weak current sensor using FeCuNbSiB single nanocrystalline toroidal core and double-winding

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Abstract

An Fe73.5Cu1Nb3Si13.5B9 nanocrystalline toroidal core made by isothermal furnace annealing shows good thermal stability of magnetic properties and excellent soft magnetic properties due to the full release of the internal stresses of the core during the annealing process. Based on the feature of the magnetic core, a novel non-contact type weak current sensor adopting single nanocrystalline core and double-winding excited by multivibrator bridge is proposed. The measuring principles for static current are given in theory by an established mathematical model of the sensor. The theory is in good agreement with the experimental results and it indicated clearly the key factors affecting performance parameters for the sensor. The multivibrator bridge output signal was analyzed by Fourier transform. Furthermore, according to the theoretical results, the method to design the signal conditioning circuit was introduced.

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Authors and Affiliations

  1. Department of Measurement and Control, School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China

    Bao Bing-hao, Zhu Da-qi, Ding Jian-ning & Li Chang-sheng

Authors
  1. Bao Bing-hao
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  2. Zhu Da-qi
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  3. Ding Jian-ning
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  4. Li Chang-sheng
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Corresponding author

Correspondence to Bao Bing-hao.

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Translated from Chinese Journal of Scientific Instrument, 2005, 26(12) (in Chinese)

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Bao, Bh., Zhu, Dq., Ding, Jn. et al. Theoretical analysis of novel weak current sensor using FeCuNbSiB single nanocrystalline toroidal core and double-winding. Front. Mech. Eng. China 1, 439–442 (2006). https://doi.org/10.1007/s11465-006-0054-7

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  • DOI: https://doi.org/10.1007/s11465-006-0054-7

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