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首页> 外文期刊>Energy Conversion & Management >Scavenging power from ultra-low frequency and large amplitude vibration source through a new non-resonant electromagnetic energy harvester
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Scavenging power from ultra-low frequency and large amplitude vibration source through a new non-resonant electromagnetic energy harvester

机译：通过新的非谐振电磁能量收割机从超低频率和大振幅振动源清除功率

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摘要

In this paper, a new non-resonant, free motion based electromagnetic energy harvester is proposed for harvesting energy from low-frequency vibration sources. In this design, steel frame is beneficially utilized to enhance the flux and consequently the power density of the harvester. The steel frame can also function as a magnetic shield to protect the harvester from external magnetic field interferences. Prototype of this harvester is constructed and characterized experimentally. A dedicated model and simulation method including non-linear contact characteristics is presented in this paper for predicting the dynamic response of this harvester at different vibration frequencies and amplitudes, and different operation modes are characterized. The measured results have well validated the behaviors predicted by the proposed model. In particular, the developed prototype of this harvester can generate a power density 748 mu W/cm(3) at a low-frequency of 4.5 Hz and 40 mm vibration amplitude. Compared to recently reported low-frequency energy harvesters summarized in Table 3, this new harvester has the superiority of high-power density. It is a non-resonant harvester so it can harvest energy for a wide frequency band.
机译：本文提出了一种新的非共振自由运动的电磁能量收割机，用于从低频振动源收集能量。在这种设计中，钢制框架有利地利用以增强通量，从而提高收割机的功率密度。钢框架还可以用作磁屏蔽以保护收割机免受外部磁场干扰。这种收割机的原型是通过实验构建和特征的。本文提出了一种专用模型和模拟方法，包括非线性接触特性，用于预测该收割机在不同振动频率和幅度下的动态响应，以及不同的操作模式。测量结果很好地验证了所提出的模型预测的行为。特别地，该收割机的开发原型可以以4.5Hz和40mm振动幅度的低频产生功率密度748μW/ cm（3）。与最近报告的低频能量收割机相比，表3总结了，这款新的收割机具有高功率密度的优越性。它是一个非谐振的收割机，因此它可以为宽频带收获能量。

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