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Impact-Based Electromagnetic Energy Harvester with High Output Voltage under Low-Level Excitations

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  • Qian Luo

    (Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China)

  • Xuefeng He

    (Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China
    College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China)

  • Senlin Jiang

    (Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China
    College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China)

  • Xingchang Wang

    (Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing 400044, China)

Abstract

To expand the applications of vibrational energy harvesters (VEHs) as power sources of wireless sensor nodes, it is of significance to improve the scavenging efficiency for the broadband, low-frequency, and low-level vibrational energy. The output voltages of electromagnetic vibrational energy harvesters (EMVEHs) are usually low, which complicates the power management circuit by an indispensable voltage boosting element. To this end, an impact-based non-resonant EMVEH mainly composed of an outer frame and an inner frame on rollers is proposed. Numerical simulations based on a mathematical model of the harvester are conducted to analyze the effects of structural parameters on the output performance. Under base excitation of 0.1 and 0.3 (where g is the gravitational acceleration, 1 g = 9.8 m · s − 2 ), the experimental maximum root mean square voltages of a harvester prototype across a resistor of 11 kΩ are as high as 7.6 and 16.5 V at 6.0 and 8.5 Hz, respectively, with the maximum output powers of 5.3 and 24.8 mW, or the power densities of 54.6 and 256 μW cm −3 . By using a management circuit without a voltage boosting element, a wireless sensor node driven by the prototype can measure and transmit the temperature and humidity every 20 s under base excitation of 0.1 g at 5.4 Hz.

Suggested Citation

  • Qian Luo & Xuefeng He & Senlin Jiang & Xingchang Wang, 2017. "Impact-Based Electromagnetic Energy Harvester with High Output Voltage under Low-Level Excitations," Energies, MDPI, vol. 10(11), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1848-:d:118783
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    References listed on IDEAS

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    1. Yao-Yun Feng & Shih-Jui Chen & You-Lin Tu, 2017. "Development of a Vibration-Based Electromagnetic Energy Harvester by a Conductive Direct-Write Process," Energies, MDPI, vol. 10(3), pages 1-8, March.
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    Cited by:

    1. Tao Wang & Yunce Zhang, 2018. "Design, Analysis, and Evaluation of a Compact Electromagnetic Energy Harvester from Water Flow for Remote Sensors," Energies, MDPI, vol. 11(6), pages 1-14, June.
    2. Li, Zhongjie & Jiang, Xiaomeng & Xu, Wanqing & Gong, Ying & Peng, Yan & Zhong, Songyi & Xie, Shaorong, 2022. "Performance comparison of electromagnetic generators based on different circular magnet arrangements," Energy, Elsevier, vol. 258(C).

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