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10 November 2022 A magnetic coupled piezoelectric energy harvester for ultra-low frequency vibrations
Yuanhua Li, Minglei Han, Miao Yang, Li Li
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Proceedings Volume 12331, International Conference on Mechanisms and Robotics (ICMAR 2022); 1233114 (2022) https://doi.org/10.1117/12.2652424
Event: International Conference on Mechanisms and Robotics (ICMAR 2022), 2022, Zhuhai, China
Abstract
Harvesting human motion energy to power intelligent wearable devices is a research hotspot in the field of energy harvesting. Due to the characteristics of ultra-low frequency of the vibration generated by human motion, the conventional piezoelectric energy harvester cannot work efficiently. This paper proposes a magnetic coupled piezoelectric energy harvester which is composed of two piezoelectric cantilever beams, two endmost magnets, a center magnet, and a tube. The ultra-low frequency vibration of human motion is sensed by the center magnet in the tube and coupled to the piezoelectric cantilever beams by the repulsive force between the endmost magnet and the center magnet. The mathematical model of the harvester is established, and the influence of various parameters on energy harvesting efficiency is analyzed in detail. Through simulation analysis, the proposed harvester can effectively harvest ultra-low frequency vibration energy of human motion.
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Yuanhua Li, Minglei Han, Miao Yang, and Li Li "A magnetic coupled piezoelectric energy harvester for ultra-low frequency vibrations", Proc. SPIE 12331, International Conference on Mechanisms and Robotics (ICMAR 2022), 1233114 (10 November 2022); https://doi.org/10.1117/12.2652424
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KEYWORDS
Magnetism
Energy harvesting
Electrical engineering
Energy efficiency
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