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A novel high-power density, low-frequency electromagnetic vibration energy harvester based on anti-phase motion
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2021-04-28 , DOI: 10.1016/j.enconman.2021.114175
Faruq Muhammad Foong , Chung Ket Thein , Daniil Yurchenko

The paper proposes a novel electromagnetic vibration energy harvester based on the concept of anti-phase vibration. Anti-phase motion is desirable in electromagnetic vibration energy harvesting applications as it results in a higher power output due to the increase in the relative velocity between the coil and the magnet components. The proposed device achieves anti-phase motion at any driving frequency due to a developed new design. The harvester was experimentally tested under a base input of 0.49 g, 0.38 g and 0.36 g, recording a power density of 765.3 Wm−3, 420.8 Wm−3 and 587.2 Wm−3 respectively under a resonant frequency of 11.8 Hz. Although the device has not yet been optimised, these values obtained are already comparable, if not higher than the recent previous works on vibration energy harvesting. In addition, the observed experimental results have well agreed with the results obtained through the mathematical model, derived in this study. The original design was then optimised to determine the optimum load resistance, mechanical arm length and component dimensions that would result in the maximum power output. Considering a base input of 0.36 g and the same friction and damping forces as obtained from the experiment, a power density of 1708.5 Wm−3 could theoretically be achieved under the same natural frequency.



中文翻译:

基于反相运动的新型高功率密度低频电磁振动能量采集器

本文提出了一种基于反相振动概念的新型电磁振动能量采集器。反相运动在电磁振动能量收集应用中是理想的,因为由于线圈和磁体组件之间相对速度的增加,它会导致更高的功率输出。由于开发了新的设计,因此所提出的设备可在任何驱动频率下实现反相运动。收割机进行了实验的0.49基极输入端下测试 ,0.38 和0.36 ,记录765.3了Wm的功率密度-3,420.8了Wm -3和587.2了Wm -3分别在11.8 Hz的谐振频率下 尽管尚未对设备进行优化,但获得的这些值已经相当,即使不高于最近关于振动能量收集的先前工作。此外,观察到的实验结果与通过本研究得出的数学模型获得的结果非常吻合。然后对原始设计进行了优化,以确定可以产生最大功率输出的最佳负载电阻,机械臂长度和组件尺寸。假设基本输入为0.36  g,并且具有与实验相同的摩擦力和阻尼力,则在相同的固有频率下,理论上可以实现1708.5 Wm -3的功率密度。

更新日期:2021-04-29
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