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A Dual Resonance Electromagnetic Vibration Energy Harvester for Wide Harvested Frequency Range with Enhanced Output Power

Author

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  • Zhijie Feng

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Han Peng

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Yong Chen

    (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

A dual resonance vibration electromagnetic energy harvester (EMEH) is proposed in this paper to extend frequency range. Compared with the conventional dual resonance harvester, the proposed system realizes an enhanced “band-pass” harvesting characteristic by increasing the relative displacement between magnet and coil among two resonance frequencies with a significant improvement in the average harvested power. Furthermore, two resonant frequencies are decoupled in the proposed system, which leads to a more straightforward design. The proposed dual resonance EMEH is constructed with a tubular dual spring-mass structure. It is designed with a serpentine planar spring and the coil position is optimized for higher power density with an overall size of 53.9 cm 3 for the dual resonance EMEH. It realizes an output power of 11 mW at the first resonant frequency of 58 Hz, 14.9 mW at the second resonant frequency of 74.5 Hz, and 0.52 mW at 65 Hz, which is in the middle of the two resonance frequencies. The frequency range of output power above 0.5 mW is from 55.8 Hz to 79.1 Hz. The maximum normalized power density (NPD) reaches up to 2.77 mW/(cm 3 ·g 2 ). Compared with a single resonance harvester design under the same topology and outer dimension at a resonant frequency of 74.5 Hz, the frequency range in the proposed EMEH achieves more than a 2× times extension. The proposed dual resonance EMEH also has more than 2 times wider frequency range than other state-of-art wideband EMEHs. Therefore, the proposed dual resonance EMEH is demonstrated in this paper for a high maximum NPD and higher NPD over a wide frequency range.

Suggested Citation

  • Zhijie Feng & Han Peng & Yong Chen, 2021. "A Dual Resonance Electromagnetic Vibration Energy Harvester for Wide Harvested Frequency Range with Enhanced Output Power," Energies, MDPI, vol. 14(22), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7675-:d:680582
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    References listed on IDEAS

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    1. Gu, Yuhan & Liu, Weiqun & Zhao, Caiyou & Wang, Ping, 2020. "A goblet-like non-linear electromagnetic generator for planar multi-directional vibration energy harvesting," Applied Energy, Elsevier, vol. 266(C).
    2. Fan, Kangqi & Cai, Meiling & Liu, Haiyan & Zhang, Yiwei, 2019. "Capturing energy from ultra-low frequency vibrations and human motion through a monostable electromagnetic energy harvester," Energy, Elsevier, vol. 169(C), pages 356-368.
    3. Zhou, Ning & Hou, Zehao & Zhang, Ying & Cao, Junyi & Bowen, Chris R., 2021. "Enhanced swing electromagnetic energy harvesting from human motion," Energy, Elsevier, vol. 228(C).
    4. Fan, Kangqi & Zhang, Yiwei & Liu, Haiyan & Cai, Meiling & Tan, Qinxue, 2019. "A nonlinear two-degree-of-freedom electromagnetic energy harvester for ultra-low frequency vibrations and human body motions," Renewable Energy, Elsevier, vol. 138(C), pages 292-302.
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    Cited by:

    1. Dibin Zhu, 2022. "Advance Energy Harvesting Technologies," Energies, MDPI, vol. 15(7), pages 1-3, March.

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