Dual-Source Energy Harvester with MPPT Technology based on Double Stack Resonance

Abstract

This paper proposed a single-inductor dual-source energy harvesting circuit with maximum power point tracking (MPPT) technology based on double stack resonance. It employs the buck-boost interface circuit to convert energy from a photovoltaic (PV) cell and a thermoelectric generator (TEG). The proposed circuit includes three operating modes called single thermoelectric mode (STM), single photoelectric mode (SPM) and dual-source mode (DM). The three modes are automatically selected according to whether the two sources reach their maximum power point. According to the simulation results. The peak conversion efficiency of the interface circuit is 86.3% and the MPPT efficiencies of the two sources are 98.75% and 99.1 % respectively.