Smart Materials and Structures, Journal Year: 2024, Volume and Issue: 33(10), P. 105020 - 105020

Published: Sept. 3, 2024

Abstract With the continuous advancement of ultra-low-power electronic devices, capturing energy from surrounding environment to power these smart devices has emerged as a new direction. However, most mechanical available for harvesting in exhibits ultra-low frequencies. Therefore, feasibility self-powering low-power largely depends on effective utilization this ultra-low-frequency energy. Consequently, work proposes an enhanced electromagnetic harvester based dual ratchet structure with secondary recovery. It converts frequency vibrations into fast rotational movements by means rack and pinion mechanism, thus achieving high output while maintaining simple structure. Experimental tests demonstrate that proposed excellent under external excitation. Under excitation 1.5 Hz amplitude 22 mm, optimal load matched at 20 Ω, maximum reaches 598 mW, density 1572.65 μ W cm −3 . The recovery accounts 34.4%, resulting 52.56% enhancement harvester’s performance. Additionally, hand-cranking indicate fabricated prototype can some common including smartphones, showcasing significant application potential.

Language: Английский