A wideband electromagnetic vibration energy harvester with coupled resonance and compact structural design

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-09-24 DOI:10.1016/j.sna.2025.117093

Qinghong Zhang , Zhifei Wang , Weitao Dou , Shudong Wang , Dan Zhou , Shuo Jiang , Linglong Cai , Yunjia Li

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Abstract

In this work, a novel electromagnetic vibration energy harvester with wide bandwidth and compact structure is designed, fabricated, and tested. Both the magnet and coil are integrated onto a single hybrid rigid-flexible planar spring, while the anchor structure is located at the device’s internal area, thereby reducing the harvester’s overall footprint. Furthermore, the magnet-coil assembly forms a two-degree-of-freedom coupled resonant system, enabling multiple vibration modes and consequently wider bandwidth of the device. Experimental results demonstrate that the device achieves an operational bandwidth of 36–64 Hz under 0.1 g acceleration, with a peak-to-peak output voltage of 1.94 V at 56 Hz. Additionally, the maximum output power reaches 165.4 μW under an optimal matching resistance of 575 Ω, highlighting its capability to efficiently harvest energy from frequency-varying ambient vibrations. At higher accelerations of 0.25 g and 0.5 g, the corresponding maximum output powers reach 1.92 mW and 4.14 mW, respectively, with the operating bandwidths broadened to 33 Hz (32–65 Hz) and 48 Hz (22–70 Hz) due to nonlinear effects.

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一种结构紧凑、耦合共振的宽带电磁振动能量采集器

本文设计、制作并测试了一种新型的宽带宽、结构紧凑的电磁振动能量采集器。磁铁和线圈都集成在一个刚柔混合平面弹簧上，而锚定结构位于设备的内部区域，从而减少了收割机的整体占地面积。此外，磁体-线圈组件形成了一个两自由度耦合谐振系统，实现了多种振动模式，从而使设备的带宽更宽。实验结果表明，该器件在0.1 g加速度下的工作带宽为36-64 Hz，在56 Hz时的峰对峰输出电压为1.94 V。此外，在最佳匹配电阻575 Ω下，最大输出功率达到165.4 μW，突出了其从频率变化的环境振动中有效收集能量的能力。在较高的加速度为0.25 g和0.5 g时，相应的最大输出功率分别达到1.92 mW和4.14 mW，由于非线性效应，工作带宽扩大到33 Hz（32-65 Hz）和48 Hz（22-70 Hz）。

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...