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Conventional vibrational energy harvesters (VEHs) are generally based on a linear mass-spring oscillator model that features narrow bandwidth and high resonant frequencies at small scales. To overcome these limitations, a two-degree-of-freedom (2-Dof) velocity-amplified VEH was developed. The harvester comprises two masses, relatively oscillating one inside the other, between four sets of magnetic...
A 2DOF velocity amplified electromagnetic vibrational energy harvester is analyzed. The system consists of two masses, one larger than the other, oscillating relative to each other in response to external excitation. The large mass is designed with a centrally located cavity into which a second smaller mass is placed. This configuration allows the larger mass to impart momentum to the smaller mass...
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