Bidirectional Thermoelectric Assisted Synchronous Charge Extraction Circuit Based on Buck Structure for Piezoelectric Energy Harvesting

Abstract Energy harvesting technology is currently a research hotspot, which can effectively solve energy supply problems in fields such as wireless sensor networks, wearable devices, and smart homes. An system using thermoelectric generator (TEG) for assistance of piezoelectric transducer (PZT) proposed. It employs synchronous charge extraction circuit based on buck structure (BUCK-SECE), uses to inject into the element both directions boost initial voltage BUCK-SECE, increasing its output power. The experimental results demonstrate that utilization increase power BUCK-SECE by factor 3.3 under low-vibration conditions 0.8 high-vibration conditions. Therefore, proposed this article enhance transducers yield desirable performance real-world applications.