Design of Multi-Source Energy Collaborative Harvesting Circuit Based on Maximum Power Point Tracking Technology

A multi-source energy cooperative harvesting is proposed in with Maximum Power Point Tracking (MPPT) technology. It can effectively harvest photovoltaic (PV), piezoelectric (PZT), and Thermoelectric Generator (TEG). Photovoltaic and piezoelectric energy are used as the main energy sources, and thermoelectric energy is used as an auxiliary energy source to assist the energy harvesting of photovoltaic and piezoelectric. The circuit topology adopts a single inductor lifting and lowering structure, which is different from the time-division multiplexing, and the circuit operates in series resonance, allows the realization of three different kinds of single-source, dual-source, and multiple-source harvesting. The work mode can be selected automatically according to whether the energy source reaches the maximum power point as well as the main and auxiliary energy sources.