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This paper presents a novel micro VEH based on 1:2 internal resonance with electromagnetic effect. The system having a volume of 2.31 cm3 is made of copper, including outer circular mass, inner circular mass, base support, and spiral beams connecting them. The outer mass introduces nonlinear magnetic force into the system to achieve 1:2 internal resonance with a circular magnetic plate opposed to another on the base support, which achieves the coupling of the first two resonant modes. The inner mass is equipped with a permanent magnet to convert energy based on electromagnetic effect. This structure is combined with multi-modal mechanism nonlinearity. Energy method is used to describe dynamic behavior, and two modes’ coordinates and corresponding natural frequencies are calculated by matrix calculation. Then the equations are simplified to the standard form using the orthogonality of the modes, which are solved with the multi-scale method. Theoretical and numerical simulation results demonstrate the proposed system is capable of improving energy harvesting efficiency by frequency up-conversion, as well as broadening the 3 dB frequency bandwidth by an order of magnitude via the split resonance peak. This VEH with a new mechanism could be an alternative source of wearable electronics devices and other applications.

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Multi-modal Microvibration Energy Harvester Based on Internal Resonance

  • 会议论文

  • 发表日期：

    2025年

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  • Han Gao,
  • Haiyang Zhao,
  • Zhujie Zhao,
  • Lijia Zhang,
  • Wei Zhang,
  • Jiajia Xiang,
  • Xiaohe Liu,
  • Sheng Qi,
  • Hongyang Xiao,
  • Siyuan Quan,
  • Maogang Li,
  • Gang Xiao,
  • Yuanlin Xia,
  • Cao Xia,
  • Zhuqing Wang

摘要

This paper presents a novel micro VEH based on 1:2 internal resonance with electromagnetic effect. The system having a volume of 2.31 cm3 is made of copper, including outer circular mass, inner circular mass, base support, and spiral beams connecting them. The outer mass introduces nonlinear magnetic force into the system to achieve 1:2 internal resonance with a circular magnetic plate opposed to another on the base support, which achieves the coupling of the first two resonant modes. The inner mass is equipped with a permanent magnet to convert energy based on electromagnetic effect. This structure is combined with multi-modal mechanism nonlinearity. Energy method is used to describe dynamic behavior, and two modes’ coordinates and corresponding natural frequencies are calculated by matrix calculation. Then the equations are simplified to the standard form using the orthogonality of the modes, which are solved with the multi-scale method. Theoretical and numerical simulation results demonstrate the proposed system is capable of improving energy harvesting efficiency by frequency up-conversion, as well as broadening the 3 dB frequency bandwidth by an order of magnitude via the split resonance peak. This VEH with a new mechanism could be an alternative source of wearable electronics devices and other applications.