Interfacing circuit for two galloping-based piezoelectric energy harveter

In this paper a nonlinear interfacing circuit is examined to increase the power efficiency of multi galloping-based piezoelectric energy harvester. In the multiple flag structure application, the structure may be composed of many piezoelectric patches and the interfacing circuit becomes more complicated and important. An optimized synchronous electric charge extraction (OSECE) nonlinear technique is introduced to optimize the interfacing circuit. The equivalent circuit of the fluttering flags is introduced and simulated with the interface by using the Matlab and PSIM software. The experiment results show the good agreement with the theoretical analysis. The interfacing circuit design concept can be further used in the multi-piezoelectric patches energy harvesting system.