Hammer Impact-Driven Power Generator Using Buzzer-Type Piezoelectric Energy Converter for Wind Power Generator Applications

Yonghyeon Na, Sahn Nahm and Young Hun Jeong ()
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Yonghyeon Na: Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju-si 52851, Korea
Sahn Nahm: Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea
Young Hun Jeong: Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju-si 52851, Korea

Energies, 2022, vol. 15, issue 21, 1-16

Abstract: A novel hammer-impact-driven power generator that uses a buzzer-type piezoelectric energy converter (BPEC) for wind-power-generator applications was designed, and the dynamic motions and output characteristics were analyzed. As the active material, Sm 0.025 -Pb 0.9625 [(Mg 1/3 Nb 2/3 ) 0.71 Ti 0.29 ]O 3 (Sm-PMN-PT)ceramic was used; this material has a high piezoelectric charge constant of 1100 pC/N and an electromechanical coupling factor of 58%. A rotational impeller triggered an impact between one end of the bar-type hammer, and, thereby, impact energy transferred to the BPECs. The manufactured power generator was tested from 50 RPM to 250 RPM, using the handmade evaluation system; it was able to operate with small impact force and greatly improved output performance as rotation speed increased. The maximum output of the generator was 10.4 W at a load resistance of 500 Ω and rotation speed of 250 RPM. For improvement of the output characteristics, the generators were arranged such that they could operate simultaneously. Moreover, the proposed model was applied to a Savonius–Darrieus turbine, and the output performance was evaluated at various wind conditions in a wind tunnel.

Keywords: piezoelectric; energy harvesting; wind power; piezoelectric buzzer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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