基于基酸盐的宽带压电微发电机的电机特性和建模
Namanu Panayanthatta1, Giacomo Clementi2, Merieme Ouhabaz2
1Centre for Radiofrequencies, Optics and Micro-Nanoelectronics in the Alps, University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP, CROMA, 38000 Grenoble, France.
Sensors (Basel, Switzerland)
|May 11, 2024
概括
这项研究介绍了一种使用酸的无压电能收割机. 该设备通过收集环境振动来有效地为物联网节点提供动力,为电池提供可持续的替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 收集能源 收集能源
- 微电子机械系统 (MEMS) 是一种微电子机械系统.
背景情况:
- 零电能收获为无线传感器节点 (WSN) 提供了可持续的电源,但局限性包括狭窄的带宽和以为基础的材料.
- 限制危险物质 (RoHS) 立法要求逐步淘汰以为基础的压电材料.
研究的目的:
- 研究酸 (LiNbO3) 作为一种无材料,用于高性能,宽带的压电能量收割机 (PEH).
- 设计,微型制造和评估基于悬臂光束的PEH,用于为物联网设备供电.
主要方法:
- 设计和微型制造一个单张紧,悬臂梁压电微型发电机的设计和微型制造,其足迹为1平方厘米.
- 性能评估包括输出功率,电压和在不同加速度下运行带宽.
- 导出梅森电机等效电路,并使用SPICE模型与实验结果进行比较.
主要成果:
- LiNbO3 PEH在1g加速时实现了近35μW/cm2的最大输出RMS功率.
- 在共振时记录了6V的峰值电压,具有最佳的负载电阻.
- 该设备显示宽带工作频率范围超过中央频率的10%,这是由于高的压电电机电联系数 (k2) 导致的.
结论:
- 开发的LiNbO3 PEH有效地收集振动能量,为物联网节点供电提供了一个可行的无替代方案.
- 收割机的输出被纠正和调节,以在0.5g的加速下为物联网节点提供动力.
- 这项工作解决了RoHS的合规性,并扩大了压电能收获的适用性.
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