Simulation Study of Uncoupled Electrical Equivalent Model of Piezoelectric Energy Harvesting Device Interfaced with Different Electrical Circuits

摘要

Piezoelectric energy harvester system has fascinated rigorous consideration in the area of self-powered wireless sensor networks. A piezoelectric energy harvesting system constitutes three components, namely, piezoelectric device, interfacing circuits, and storage element. In this paper, a simulation study of the coupled modeling of device equivalent uncoupled model has been carried out with four electrical circuits, namely, SBR, self-powered P-SSHI and S-SSHI, and modified PSSHI circuits. Here, modified PSSHI circuit is the recently developed interfacing circuit that has the advantage of less cost and reduced circuit complexity. From the simulated results, it has been observed that P-SSHI circuit provides maximum piezoelectric voltage (KV) and zero phase difference between piezoelectric voltage and input vibration current. Moreover, this technique provides maximum power (530 mW) and maximum output voltage (600 V) across optimal resistance (680 K).