Design and analysis of slotted cantilever structure for piezoelectric energy harvesting

A micro electro-mechanical system based energy harvester is designed for conversion of mechanical vibration energy via piezoelectric effect. This paper describes vibration based piezoelectric energy harvester in side clamped and slotted form. The cantilever structures are designed in COMSOL Multiphysics tool. A resonant frequency analysis for the cantilever structure has been carried out. The cantilever structures are compared under identical condition of 1 g acceleration. Slotted cantilever structures has a better resonant frequency compared to the side clamped structure, but the peak power density of the system is quite low as compared to the side clamped structure.