HARVESTING ELECTRICAL ENERGY FROM MECHANICAL VIBRATION BY PIEZOELECTRIC MATERIALS AND PERFORMANCE OPTIMIZATION

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2022-9-2

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Ogunjinmi, Festus

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The energy conversion performance of piezoelectric cantilever-beam energy harvesters (PCEH) is improved by developing and designing a novel. A rectangular hole is located in the middle of the metal substrate. Using the mathematical model of the PCEH, the mathematical expression of the following is derived as the eigenfrequency, displacement of the proof mass, and output voltage and power level achieved due to displacement of the cantilever carrying the piezoelectric material. We analyze the eigenfrequency and frequency domain of the model using NANOHUB to investigate the effects of frequency, load resistance, and acceleration on voltage and power. To further optimize the energy conversion of the piezoelectric using cantilever and boost converter an experimental verification was conducted. A novel PCEH has an optimal peak output power of 3451.55 μW and 5121 mV, at 0.01v diode voltage threshold of a rectifier circuit while the converter boost output yielded 15V from 5121 mV, which is 5 V input. Due to these advantages, the novel PCEH produces the output voltage and power at a higher level and a low frequency, as well as improved energy conversion efficiency.

Subject Keywords

Energy-conversion, Efficiency, Mathematical modelling, Piezoelectric, Cantilever-beam Energy harvesters (PCEH)

URI

https://hdl.handle.net/11511/101130

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Northern Cyprus Campus, Thesis

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Citation Formats

F. Ogunjinmi, “HARVESTING ELECTRICAL ENERGY FROM MECHANICAL VIBRATION BY PIEZOELECTRIC MATERIALS AND PERFORMANCE OPTIMIZATION,” M.S. - Master of Science, Middle East Technical University, 2022.