An Electromagnetic Micro Power Generator for Low-Frequency Environmental Vibrations Based on the Frequency Upconversion Technique
By I. Sari, Tuna Balkan, Haluk Kulah. Journal of microelectromechanical systems, 2009
149 citations recorded by the source corpus.
This paper presents a microelectromechanical-system-based electromagnetic vibration-to-electrical power generator that can harvest energy from low-frequency external vibrations. The efficiency of vibration-based harvesters is proportional to excitation frequency, so the proposed generator is designed to convert low-frequency environmental vibrations to a higher frequency by employing the frequency upconversion (FupC) technique. It has been shown that the generator can effectively harvest energy from environmental vibrations of 70-150 Hz and generates 0.57-mV voltage with 0.25-nW power from a single cantilever by upconverting the input vibration frequency of 95 Hz-2 kHz. The fabricated generator size is 8.5×7×2.5 mm3, and a total of 20 serially connected cantilevers have been used to multiply the generated voltage and power. The generator demonstrated in this paper is designed for the proof of concept, and the power and voltage levels can further be increased by increasing the number of cantilevers or coil turns. The performance of the generator is also compared with that of a same sized custom-made traditional magnet-coil-type generator and with that of a traditional generator from the literature to prove its effectiveness.
Subfields: Electrical and Electronic Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/ae6547a0b310d28c49cc4cb2cd9aaf3375c08edf
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Citations in the corpus
- Investigation of a MEMS piezoelectric energy harvester system with a frequency-widened-bandwidth mechanism introduced by mechanical stoppers (2012, unknown): “A microfabricated version of this device was also reported by Sari et al [19].”
- Plucked piezoelectric bimorphs for knee-joint energy harvesting: modelling and experimental validation (2011, background): “Sari et al [9] have applied the principle of frequency up-conversion via plucking to the microscale and prototyped an electromagnetic generator where the low-frequency vibration of a suspended magnet excites the high-frequency vibration of a number of coilcarrying cantilevers placed around it.”