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Design and Analysis of a Linear Electric Generator for Harvesting Vibration Energy

Author

Listed:
  • Joshua Then

    (School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW 2522, Australia)

  • Ashish P. Agalgaonkar

    (School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW 2522, Australia)

  • Farzad Safaei

    (School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW 2522, Australia)

  • Kashem M. Muttaqi

    (School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW 2522, Australia)

Abstract

This paper provides a proof of concept for a linear electric generator that can be used to harvest energy from various sources of linear motion, such as vibrations, free-piston engines and wave energy. The generator can be used to power small electronic devices, such as sensors, or charge household batteries. The literature was reviewed to develop an understanding about the applications, control methods, excitation methods and mechanics of rotating and linear electric machines. A bidirectional, two-sided linear machine was designed with two stator cores and a single mover core. The stator windings and mover winding can be independently excited, allowing for three modes: no mover excitation, a DC excited mover, and an AC excited mover. Simulation results showed that the magnetic flux generated by DC excited stator cores were concentrated in the centre of the mover core. The use of two stator cores eliminates lateral flux in the mover core when it is not excited, minimising attraction and repulsion forces. Parametric analysis showed that flux cutting occurred in all operation modes, verifying that the generator will produce power when operating. Hardware tests produced an output current when the machine was electrically and mechanically excited, verifying the proposed design.

Suggested Citation

  • Joshua Then & Ashish P. Agalgaonkar & Farzad Safaei & Kashem M. Muttaqi, 2024. "Design and Analysis of a Linear Electric Generator for Harvesting Vibration Energy," Energies, MDPI, vol. 17(7), pages 1-12, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:7:p:1715-:d:1369539
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    References listed on IDEAS

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    4. Zhao, Lin-Chuan & Zou, Hong-Xiang & Zhao, Ying-Jie & Wu, Zhi-Yuan & Liu, Feng-Rui & Wei, Ke-Xiang & Zhang, Wen-Ming, 2022. "Hybrid energy harvesting for self-powered rotor condition monitoring using maximal utilization strategy in structural space and operation process," Applied Energy, Elsevier, vol. 314(C).
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