An ultralow-frequency high-efficiency rotational energy harvester with bistability principle and magnetic plucking mechanism

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2024-11-11 DOI:10.1063/5.0235392

Xiaobo Rui, Hang Li, Yu Zhang, Zhou Sha, Hao Feng, Zhoumo Zeng

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Abstract

In this paper, we propose an energy harvester that overcomes the bottleneck problem under ultralow-frequency rotational motion. The harvester consists of bistable dual piezoelectric energy harvesters (BD-PEH) with the magnetic plucking mechanism. The driving magnet is introduced to provide the magnetic plucking to BD-PEH. Therefore, the BD-PEH can operate at high-frequency vibrations across the potential well under ultralow-frequency rotation, which enhances energy harvesting efficiency. A numerical model of the harvester is developed, and the model results are in agreement with the experimental results. The effect of the depth of the potential well on the performance of the harvester is analyzed. The deeper the potential well, the higher the energy output, but it will reduce the bandwidth of the harvester. The experimental results show that the highest average power output is 0.81 mW at 1.2 Hz. In conclusion, the energy harvester proposed in this paper can generate enough energy to drive low-power electronic devices under ultralow-frequency rotational motion.

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采用双稳态原理和磁拨机制的超低频高效旋转能量收集器

本文提出的能量收集器克服了超低频旋转运动下的瓶颈问题。该能量收集器由双稳态双压电能量收集器（BD-PEH）和磁拨机制组成。驱动磁铁的引入为 BD-PEH 提供了磁拨动。因此，BD-PEH 可在超低频旋转下跨势阱高频振动运行，从而提高能量收集效率。研究人员建立了能量收集器的数值模型，模型结果与实验结果一致。分析了势阱深度对能量收集器性能的影响。势阱越深，能量输出越高，但会降低收割机的带宽。实验结果表明，1.2 Hz 时的平均功率输出最高，为 0.81 mW。总之，本文提出的能量收集器可以产生足够的能量，在超低频旋转运动下驱动低功率电子设备。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.