Design and Fabrication of Low Frequency Driven Energy Harvester Using Electromagnetic Conversion

Lee, Byung‐Chul; Chung, Gwiy‐Sang

doi:10.4313/teem.2013.14.3.143

Cited by 15 publications

(1 citation statement)

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“…To this end, scholars have proposed some different design schemes. The most common strategy is to adjust the system's resonant frequency, by tuning the equivalent mass or stiffness [6,7] of the resonant structure, to match the vibration source frequency. But some elastic elements have high rigidity due to the structure or material, resulting in much higher resonant frequency than that of the vibration source, such that it is difficult to match frequency by tuning.…”

Section: Introductionmentioning

confidence: 99%

Design and Research on a Nonlinear 2DOF Electromagnetic Energy Harvester With Velocity Amplification

Liu

Jin

et al. 2020

IEEE Access

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In order to power the microelectronic devices of the Internet of Things in the low-frequency broadband vibration environment, a novel nonlinear 2DOF electromagnetic energy harvester was proposed based on the magnetic levitation structure and velocity amplification mechanism. The electromechanical coupling model was established and numerically simulated to analyze the generating characteristics. A prototype was fabricated and tested to verify the theoretical model. The influences of the key parameters, including the gap between the suspended magnet and the lower spring, excitation acceleration, spring stiffness, mass of copper cylinder, on the generating characteristics were studied. When it was subjected to a harmonic excitation with acceleration amplitude of 0.8g, the measured open-circuit voltage reached peaks of 3.13 V at 8 Hz and 2.93 V at 13.5 Hz, respectively. The optimal output power at 8 Hz was 10.18 mW with the matched load resistance of 250 Ω. Both the experimental and theoretical results demonstrated that this novel electromagnetic energy harvester had obvious advantages in increasing the output power and widening the bandwidth. INDEX TERMS Electromagnetic energy harvester, low frequency, velocity amplification, broadband.

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Section: Introductionmentioning

confidence: 99%