An arc-shaped piezoelectric generator for multi-directional wind energy harvesting

摘要: Abstract In this study, a piezoelectric wind energy harvester was demonstrated, which aimed at addressing the limitations of existing approaches including single-directional operation and narrow working speed range. harvester, an arc-shaped elastic beam, instead conventional thin cantilever beams, adopted to extract energy. Benefiting from beam’s characteristics structure elasticity, is capable scavenging without any extra accessory responding multi-directional excitations. An analytical model established investigate effects direction structural parameters on electrical output. test, worked efficiently with coming four directions in range 2–17 m/s produced maximum open-circuit voltage up 34 V. When connected external load 15  k Ω , showed peak output power 1.73 mW 17 m/s. addition, 18 serial-connected commercial light-emitting diodes (LEDs) were lit simultaneously 10.5 m/s, confirmed practicability harvester.