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This technology uses a piezo-magneto-elastic device for substantial performance enhancement in broadband vibration energy harvesting. The prototype tested in our lab exhibits large-amplitude periodic (limit cycle) oscillations for excitations over a frequency range. The piezo-magneto-elastic generator results in a 200% increase in the open-circuit voltage amplitude (hence promising ...

Self-charging composite structures are used as vibration-based energy harvesting devices that are capable of both generating and storing energy in a single unit. The self-charging devices generate electrical energy when subjected to vibration excitation causing strain in the piezoelectric layers due to the direct piezoelectric effect. Energy is ...