Cantilever-based electret energy harvesters
Cantilever-based electret energy harvesters
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DOI：
10.1088/0964-1726/20/10/105013
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发表时间：
2011-10-01
影响因子：
4.1
通讯作者：
Sylvestre, A.
中科院分区：
文献类型：
--
作者：
Boisseau, S.;Despesse, G.;Sylvestre, A.
结构和功能的集成使得传感器、致动器和电子设备的电力消耗得以减少。因此，现在可以想象能够从周围环境中收集能量的低功耗设备。一种方法是开发能够将机械能（如振动）转化为电能的转换器：本文重点介绍使用驻极体的静电转换器。我们开发了一个准确的分析模型，一个简单而有效的基于双极的驻极体能量采集器。我们证明，振动0.1克（类似于1米秒（-2）），理论上是可能的收获高达30亩W每克的移动的质量。该功率对应于根据William和Yates的模型的谐振能量采集器的最大输出功率。仿真结果得到了实验测量的验证，同时提出了寄生电容对输出功率的较大影响。因此，我们“仅”设法获得每克移动的质量10 μ W，但根据我们的优点因素，这是迄今为止取得的最好结果之一。
Integration of structures and functions has permitted the electricity consumption of sensors, actuators and electronic devices to be reduced. Therefore, it is now possible to imagine low-consumption devices able to harvest energy from their surrounding environment. One way to proceed is to develop converters able to turn mechanical energy, such as vibrations, into electricity: this paper focuses on electrostatic converters using electrets. We develop an accurate analytical model of a simple but efficient cantilever-based electret energy harvester. We prove that with vibrations of 0.1 g (similar to 1 m s(-2)), it is theoretically possible to harvest up to 30 mu W per gram of mobile mass. This power corresponds to the maximum output power of a resonant energy harvester according to the model of William and Yates. Simulation results are validated by experimental measurements, raising at the same time the large impact of parasitic capacitances on the output power. Therefore, we 'only' managed to harvest 10 mu W per gram of mobile mass, but according to our factor of merit, this is among the best results so far achieved.