Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester
Wave energy is one of the most reliable and promising renewable energy sources that has attracted lots of attention, including piezoelectric wave energy harvesting devices. One of the challenges for piezoelectric wave power generation is the relatively low-frequency wave environments in the ocean. M...
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MDPI AG
2025-02-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/16/3/252 |
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| author | Wuwei Feng Xiang Luo Shujie Yang Qingping Zou |
| author_facet | Wuwei Feng Xiang Luo Shujie Yang Qingping Zou |
| author_sort | Wuwei Feng |
| collection | DOAJ |
| description | Wave energy is one of the most reliable and promising renewable energy sources that has attracted lots of attention, including piezoelectric wave energy harvesting devices. One of the challenges for piezoelectric wave power generation is the relatively low-frequency wave environments in the ocean. Magnetic excitations are one of the techniques used to overcome this issue. However, there is a lack of understanding of the mechanisms to maximize the electric power output of piezoelectric wave energy harvesters through magnetic excitations. In the present study, magnetic excitation experiments were conducted to investigate the power generation of a coupled spring pendulum piezoelectric energy harvester under various magnetic field conditions. Firstly, the mass of the load magnet that can induce the resonance phenomenon in piezoelectric elements was experimentally determined. Then, the power generation of piezoelectric elements was tested under different excitation magnetic spacings. Finally, the influence of different distribution patterns of excitation magnets on the performance of piezoelectric elements was tested. It was found that under the conditions of a load magnet mass of 2 g, excitation magnet spacing of 4 mm, and two excitation magnets stacked on the inner pendulum, optimum power generation of the piezoelectric wave harvester was achieved with a peak-to-peak output voltage of 39 V. The outcome of this study provides new insight for magnetic excitation devices for piezoelectric wave energy harvesting to increase the feasibility and efficiency of wave energy conversion to electrical energy. |
| format | Article |
| id | doaj-art-43f1e1569dab413a9db6be13a0294e12 |
| institution | OA Journals |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj-art-43f1e1569dab413a9db6be13a0294e122025-08-20T01:48:57ZengMDPI AGMicromachines2072-666X2025-02-0116325210.3390/mi16030252Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy HarvesterWuwei Feng0Xiang Luo1Shujie Yang2Qingping Zou3College of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan 316004, ChinaCollege of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan 316004, ChinaCollege of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan 316004, ChinaThe Lyell Centre for Earth and Marine Science and Technology, Institute for Infrastructure and Environment, Heriot-Watt University, Edinburgh EH14 4AS, UKWave energy is one of the most reliable and promising renewable energy sources that has attracted lots of attention, including piezoelectric wave energy harvesting devices. One of the challenges for piezoelectric wave power generation is the relatively low-frequency wave environments in the ocean. Magnetic excitations are one of the techniques used to overcome this issue. However, there is a lack of understanding of the mechanisms to maximize the electric power output of piezoelectric wave energy harvesters through magnetic excitations. In the present study, magnetic excitation experiments were conducted to investigate the power generation of a coupled spring pendulum piezoelectric energy harvester under various magnetic field conditions. Firstly, the mass of the load magnet that can induce the resonance phenomenon in piezoelectric elements was experimentally determined. Then, the power generation of piezoelectric elements was tested under different excitation magnetic spacings. Finally, the influence of different distribution patterns of excitation magnets on the performance of piezoelectric elements was tested. It was found that under the conditions of a load magnet mass of 2 g, excitation magnet spacing of 4 mm, and two excitation magnets stacked on the inner pendulum, optimum power generation of the piezoelectric wave harvester was achieved with a peak-to-peak output voltage of 39 V. The outcome of this study provides new insight for magnetic excitation devices for piezoelectric wave energy harvesting to increase the feasibility and efficiency of wave energy conversion to electrical energy.https://www.mdpi.com/2072-666X/16/3/252wave energypiezoelectric energy harvestingmagnetic excitationspring pendulumPWECpiezoelectric wave energy converter |
| spellingShingle | Wuwei Feng Xiang Luo Shujie Yang Qingping Zou Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester Micromachines wave energy piezoelectric energy harvesting magnetic excitation spring pendulum PWEC piezoelectric wave energy converter |
| title | Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester |
| title_full | Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester |
| title_fullStr | Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester |
| title_full_unstemmed | Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester |
| title_short | Magnetic Excitation for Coupled Pendulum and Piezoelectric Wave Energy Harvester |
| title_sort | magnetic excitation for coupled pendulum and piezoelectric wave energy harvester |
| topic | wave energy piezoelectric energy harvesting magnetic excitation spring pendulum PWEC piezoelectric wave energy converter |
| url | https://www.mdpi.com/2072-666X/16/3/252 |
| work_keys_str_mv | AT wuweifeng magneticexcitationforcoupledpendulumandpiezoelectricwaveenergyharvester AT xiangluo magneticexcitationforcoupledpendulumandpiezoelectricwaveenergyharvester AT shujieyang magneticexcitationforcoupledpendulumandpiezoelectricwaveenergyharvester AT qingpingzou magneticexcitationforcoupledpendulumandpiezoelectricwaveenergyharvester |