Horizontally Assembled Trapezoidal Piezoelectric Cantilevers Driven by Magnetic Coupling for Rotational Energy Harvester Applications

Yonghyeon Na, Min-Seon Lee, Jung Woo Lee and Young Hun Jeong
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Yonghyeon Na: Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology, Jinju 52851, Korea
Min-Seon Lee: Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology, Jinju 52851, Korea
Jung Woo Lee: Department of Materials Science and Engineering, Pusan National University, Busan 46241, Korea
Young Hun Jeong: Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology, Jinju 52851, Korea

Energies, 2021, vol. 14, issue 2, 1-16

Abstract: Horizontally assembled trapezoidal piezoelectric cantilevers driven by magnetic coupling were fabricated for rotational energy harvester applications. A dodecagonal rigid frame with an attached array of six trapezoidal cantilevers served as a stator for electrical power generation. A rotor disk with six permanent magnets (PMs) interacted magnetically with the counterpart cantilever’s tip-mass PMs of the stator by rotational motion. Each trapezoidal piezoelectric cantilever beam was designed to operate in a transverse mode that utilizes a planar Ag/Pd electrode printed onto lead zirconate titanate (PZT) piezoelectric thick film. The optimized distance between a pair of PMs of the rotor and the stator was evaluated as approximately 10 mm along the same vertical direction to make the piezoelectric cantilever beam most deflectable without the occurrence of cracks. The theoretically calculated resistance torque was maximized at 46 mN·m for the optimized trapezoidal piezoelectric cantilever. The proposed energy harvester was also demonstrated for wind energy harvester applications. Its harvested output power reached a maximum of approximately 22 mW at a wind speed of 10 m/s under a resistive load of 30 kΩ. The output performance of the proposed energy harvester makes it possible to power numerous low-power applications such as smart sensor systems.

Keywords: trapezoidal cantilever; magnetic coupling; piezoelectric bimorph; magneto-piezo-elastic; energy harvesting (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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