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Magnetic force of piezoelectric cantilever energy harvesters with external magnetic field

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  • Piezoelectric Energy Harvesting
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Abstract

In piezoelectric cantilever energy harvesters with external magnetic field, one of the difficulties is the impact of the external magnetic field or magnetic force on vibration response and energy harvesting efficiency. Here we use the magnetizing current and magnetic dipoles approaches to analyze the magnetic force. The two calculation models are proposed for the energy harvesters. The calculation results of the two methods are compared with a set of experimental data. It has been proved that errors are produced with both methods while the magnet interval is sufficiently small. However, the calculation result achieved from magnetic dipoles approach is closer to experimental measurements than the one of magnetizing current approach. Consequently, the magnetic dipoles approach can be chosen preferably to calculate the magnetic force of piezoelectric cantilever energy harvesters with external magnetic field.

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Authors and Affiliations

  1. School of Mechanical Engineering, Tianjin University, Tianjin, 300072, China

    D. Tan, Y.G. Leng & Y.J. Gao

  2. Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, 300072, China

    Y.G. Leng

Authors
  1. D. Tan
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  2. Y.G. Leng
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  3. Y.J. Gao
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Correspondence to Y.G. Leng.

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Tan, D., Leng, Y. & Gao, Y. Magnetic force of piezoelectric cantilever energy harvesters with external magnetic field. Eur. Phys. J. Spec. Top. 224, 2839–2853 (2015). https://doi.org/10.1140/epjst/e2015-02592-6

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  • DOI: https://doi.org/10.1140/epjst/e2015-02592-6

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