Adaptive FOCV MPPT for Piezoelectric Energy Harvesting Circuit

This paper introduces a novel adaptive fractional open circuit voltage MPPT algorithm for maximizing power output of piezoelectric energy harvesting systems by adjusting the output voltage of the rectifier circuit. The algorithm measures the charge loss duration, enabling effective tracking only when excitation changes. The experimental results demonstrate that the proposed method outperforms state-of-the-art MPPT algorithms in terms of power efficiency, circuit simplicity, and sampling time, and confirms its effectiveness in enhancing the performance of piezoelectric energy harvesting systems.