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A tunable helmholtz resonator for electromagnetic energy harvesting

Askari Farsangi, M. A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/ICRoM.2018.8657492
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. In this paper, acoustic energy harvesting using a tunable Helmholtz Resonator (HR) is investigated. The frequency of resonator can be changed by varying the radial force in a membrane which is used in one of its face. Applying acoustic pressure, vibrates the air inside HR neck and therefore changes pressure in HR chamber which results in membrane vibration. Attached magnet to the membrane will vibrate and its relative motion to a fixed coil generates voltage on the basis of Faraday's law of induction. Modeling approach is developed considering equivalent nonlinear membrane stiffness and coupling of electrical circuit and mechanical device. At the end, system behavior is studied numerically and effects of several factors such as radial force, electrical resistance and geometric parameters has been taken into account. © 2018 IEEE
  6. Keywords:
  7. Electromagnet ; Electromagnetic waves ; Electromagnets ; Resonators ; Robotics ; Acoustic energy harvesting ; Acoustic excitation ; Acoustic pressures ; Electrical circuit ; Electrical resistances ; Membrane vibrations ; Nonlinear membrane ; Tunable Helmholtz resonator ; Energy harvesting
  8. Source: Proceedings of the 6th RSI International Conference on Robotics and Mechatronics, IcRoM 2018, 23 October 2018 through 25 October 2018 ; 2019 , Pages 322-325 ; 9781728101279 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/8657492