A drum-like piezoelectric rotational energy harvester via magnetic beating

In this Letter, an indirectly excited approach of introducing an air-filled separation chamber is proposed to develop a drum-like piezoelectric rotational energy harvester (DL-PREH) via magnetic beating. The harvester delivers the external excitation to the piezoelectric transducer via the intermedi...

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Veröffentlicht in:Applied physics letters 2023-09, Vol.123 (11)
Hauptverfasser: Kan, Junwu, Wu, Yaqi, Gu, Yiqun, Wang, Shuyun, Meng, Fanxu, Zhang, Zhonghua
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container_issue 11
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container_title Applied physics letters
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creator Kan, Junwu
Wu, Yaqi
Gu, Yiqun
Wang, Shuyun
Meng, Fanxu
Zhang, Zhonghua
description In this Letter, an indirectly excited approach of introducing an air-filled separation chamber is proposed to develop a drum-like piezoelectric rotational energy harvester (DL-PREH) via magnetic beating. The harvester delivers the external excitation to the piezoelectric transducer via the intermediate air chamber, and the electric output of transducer is induced by the air pressure inside the chamber. Thus, a high reliability can be guaranteed for the harvester under an unexpected excessive impact due to the air-filled separation zone. Moreover, the harvester can easily implement a resonant frequency tuning by altering the drum height to improve the rotation speed adaptability. Its potential applications as a sustainable power source to charge different capacitors and power commercial light-emitting diodes (LEDs) are demonstrated experimentally. The fabricated DL-PREH device can achieve a maximum output power of 10.63 mW with a drum height of 6 mm at the matching resistance of 24 kΩ. Also, it can light up at least 100 blue commercial LEDs in parallel. The designed harvester exhibits its good power generation capability and resonance frequency tunability.
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Air chambers
Applied physics
Energy harvesting
Light emitting diodes
Piezoelectric transducers
Power management
Power sources
Resonant frequencies
Separation
title A drum-like piezoelectric rotational energy harvester via magnetic beating
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