Synchronous Inductor Switched Energy Extraction Circuits for Triboelectric Nanogenerator

Triboelectric nanogenerator (TENG), a class of mechanical to electrical energy transducers, has emerged as promising solution self-power Internet Things (IoT) sensors, wearable electronics, etc. The use synchronous switched extraction circuits (EECs) an interface between TENG and battery load can deliver multi-fold gain over simple-minded Full Wave Rectification (FWR). This paper presents detailed analysis Parallel Series Synchronous Switched Harvesting on Inductor (P-SSHI S-SSHI) EECs derive the delivered compare it with standard FWR (a 3rd circuit) in common analytical framework, under both realistic conditions, also ideal conditions. Further, optimal value maximize output upper bound beyond which charging is not feasible are derived for all three considered circuits. These closed-form results general parameters first-order circuit non-idealities shed light physics modeling guide choice design any given TENG. verified against PSpice based simulation well experimentally measured values. In our experiments, P-SSHI S-SSHI found provide 1.18 8.59 fold per-cycle at 15 V load, respectively.