Smart Structures and Systems

  • 제25권4호
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  • Pages.393-399
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  • 2020
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Design method for the 2DOF electromagnetic vibrational energy harvester

  • Park, Shi-Baek (Department of Mechanical Engineering, Yonsei University) ;
  • Jang, Seon-Jun (School of Mechanical Engineering, Hoseo University)
  • 투고 : 2019.05.17
  • 심사 : 2019.07.31
  • 발행 : 2020.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, the design method and experimental validation for the two-degree-of-freedom (2DOF) electromagnetic energy harvester are presented. The harvester consists of the rigid body suspended by four tension springs and electromagnetic transducers. Once the two resonant frequencies and the mass properties are specified, both the constant and the positions for the springs can be determined in the closed form. The designed harvester can locate two resonant peaks close to each other and forms the extended frequency bandwidth for power harvesting. Halbach magnet array is also introduced to enhance the output power. In the experiment, two resonant frequencies are measured at 34.9 and 37.6 Hz and the frequency bandwidth improves to 5 Hz at the voltage level of 207.9 mV. The normalized peak power of 4.587 mW/G2 is obtained at the optimal load resistor of 367 Ω.

키워드

과제정보

연구 과제 주관 기관 : Hoseo University

This research was supported by the Academic Research fund of Hoseo University in 2015(2015-0120).

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