Electrical Interfacing Circuit Discussion of Galloping-based Piezoelectric Energy Harvester

The equivalent circuit and electrical interfacing circuit of a galloping-based piezoelectric flag energy harvester is discussed and the nonlinear synchronized switching technique is used to increase the power. Energy harvesting from ambient is highly focused and by using a cantilever beam to convert the vibration energy is the most popular topics. Except using cantilever beam, piezoelectric flag or plate converted the flow energy has been widely invested. As the interfacing circuit is the important design part to increase the power output, in this paper, several interfacing circuit including standard DC approach, SSHI technique and transformer-based SSHI technique are proposed and compared. Simulations and experimental results show the optimal interfacing circuit in piezoelectric flow energy harvester