2021
DOI: 10.1063/5.0067141
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A micro-electromagnetic vibration energy harvester with higher power density and wider bandwidth utilizing 3D MEMS coils

Abstract: In this study, the performance of an electromagnetic vibration energy harvester (EM-VEH) based on micro-electro-mechanical systems 3D coils was presented theoretically and experimentally. The VEH employs two 3D coils and E-shape iron cores inserted into the coils to reduce the magnetic leakage and to improve the output power. In this structure, the planar spring stiffness and the attraction between the iron core and magnet are nonlinear, which can broad the bandwidth. In the theoretical work, a magnetic dipole… Show more

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Cited by 3 publications
(1 citation statement)
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“…Machines and equipment with relatively high frequencies (above 70 Hz), such as washing machine, blender, automobile engine, and household electrical generator, have associated acceleration levels of 0.05 to 4 g. With respect to harvesting energy from different vibration sources, one of the main challenges is to develop effective miniaturized energy harvesters that cover a wide range of operating frequencies while stabilizing their output power at the milliwatt level. The electromagnetic, piezoelectric, and triboelectric based vibrational generators are the commonly deployed technologies to convert ambient vibration energy into substantial electricity for powering up the sensor nodes . An electromagnetic generator (EMG) based on Faraday’s law has the merits of low cost, easy maintenance, high current, and long-lasting durability, which is well-suited for the engineering field .…”
Section: Introductionmentioning
confidence: 99%
“…Machines and equipment with relatively high frequencies (above 70 Hz), such as washing machine, blender, automobile engine, and household electrical generator, have associated acceleration levels of 0.05 to 4 g. With respect to harvesting energy from different vibration sources, one of the main challenges is to develop effective miniaturized energy harvesters that cover a wide range of operating frequencies while stabilizing their output power at the milliwatt level. The electromagnetic, piezoelectric, and triboelectric based vibrational generators are the commonly deployed technologies to convert ambient vibration energy into substantial electricity for powering up the sensor nodes . An electromagnetic generator (EMG) based on Faraday’s law has the merits of low cost, easy maintenance, high current, and long-lasting durability, which is well-suited for the engineering field .…”
Section: Introductionmentioning
confidence: 99%