Vibration Energy Harvester Using Piezoelectric with Truncated Cone Rectangular Beam Structure for Low-Power Applications

The proposed energy harvester presents a new structure in the geometry of piezo-based vibration energy harvesters employing cantilever beams in order to harvest high electric power from the ambient environment’s low vibration range. This  piezo harvester is ideally suited for  less-power applications such as Internet of things devices, sensor nodes, and medical implants. The natural frequencies and associated comprehensive parameters, as well as the stress distribution throughout the piezo patch, are investigated using COMSOL Multiphysics. Also, the truncated cone's tapering radius ratio is examined for its ideal value. It is demonstrated that the TCRCB-type piezoelectric vibration energy harvester with the best taper radius ratio outperforms the uniform and trapezoidal cantilever beams in terms of power. The obtained simulation findings are confirming the usefulness of the suggested harvester.