Micro-power design of a fully autonomous energy harvesting circuit for arrays of piezoelectric transducers

Piezoelectric energy harvesting is a promising technology due to its ability to convert vibrations into electricity with a simple design and adaptable sizing. This technology allows us to capture energy from everyday movements and power devices. The size of the harvester significantly impacts its weight, how it’s made, the amount of power it generates, and where it can be used.While a single piezoelectric element can harvest energy, an array of them combined with a vibration source can produce more power. However, the material properties of commonly used piezoelectrics, like Lead Zirconate Titanate (PZT), can limit efficiency. To improve this, additional circuits with rectifier bridges and capacitors are used.