A Vibration-Based Electromagnetic Energy Harvester Using Mechanical Frequency Up-Conversion Method

Date

2011-02-01

Author

Zorlu, Ozge
Topal, Emre Tan
Külah, Haluk

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This paper presents a new vibration-based electromagnetic energy harvester using a mechanical frequency up-conversion method for harvesting energy from external low-frequency vibrations within a range of 1-10 Hz. The structure consists of a magnet placed on a diaphragm, a polystyrene cantilever carrying a pick-up coil, and a mechanical barrier which converts low-frequency vibrations to a higher frequency, hence increasing the efficiency of the system. The tested structure proved to generate 88.6 mV and 544.7 mu W rms power output by up-converting 10-Hz external vibration to 394 Hz. The obtained power density is 184 mu W/cm(3), with a device volume of 2.96 cm(3). An analytical model is developed to analyze the behavior of the energy harvester prototypes with various dimensions. The model predicts the performance parameters of the structures within 5% error range. The effect of scaling down the device dimensions is investigated through the developed model and fabricated prototypes. It is shown that the power density of the energy harvester is increased as its dimensions are scaled down, proving that the proposed structure is a good candidate to be used in low-power wireless microsystems operating at low-frequency vibrations.

Subject Keywords

Electromagnetic energy generation, Energy harvesting, Low-frequency vibrations, Power density

URI

https://hdl.handle.net/11511/37914

Journal

IEEE SENSORS JOURNAL

DOI

https://doi.org/10.1109/jsen.2010.2059007

Collections

Department of Electrical and Electronics Engineering, Article

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Citation Formats

O. Zorlu, E. T. Topal, and H. Külah, “A Vibration-Based Electromagnetic Energy Harvester Using Mechanical Frequency Up-Conversion Method,” IEEE SENSORS JOURNAL, pp. 481–488, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37914.