一个频率向上转换的压电能量收割机转向同步电荷提取电路
Xuzhang Peng1, Hao Tang1, Zhongjie Li2
1Internet of Things Thrust, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511400, China.
Micromachines
|July 27, 2024
概括
本研究介绍了一种频率向上转换的压电能量收割机 (FUC-PEH) 模型. 该模型展示了高效的低频到高频能量转换,通过振幅切断和同步电荷提取来提高性能.
科学领域:
- 收集能源 收集能源
- 压电材料 压电材料
- 振动能量转换方法 振动能量转换方法
背景情况:
- 频率向上转换的压电能量收获器 (FUC-PEHs) 使用机械元件来放大和转换低频振动为高频电能.
- 现有的FUC-PEH设计需要详细的建模来优化性能和了解底层机制.
研究的目的:
- 开发和验证频率向上转换压电能量收割机 (FUC-PEH) 的简化一次性参数模型.
- 使用开发的模型,研究关键系统参数对FUC-PEH性能的影响.
- 探索同步电荷提取 (SECE) 电路的整合,以提高能源采集效率.
主要方法:
- 基于压电构成方程和结构动力学,开发了FUC-PEH的一次性参数模型.
- 创建了一个等效电路模型 (ECM),使用机电学类比来模拟FUC-PEH行为.
- 对诸如弹刚度和质量等参数进行了参数研究.
- 将同步电荷提取 (SECE) 电路集成到ECM中进行系统级分析.
主要成果:
- 相当的电路模型准确地表示FUC-PEH,显示低频输入转换为高频输出.
- 碰撞引起的振幅缩短 (AT) 被确定为扩大操作带宽的机制.
- 模拟证实通过频率上升转换提高了能源转换效率.
- SECE电路集成显示了进一步提高性能的潜力.
结论:
- 简化ECM为FUC-PEH运行和设计提供了宝贵的见解.
- 振幅切断和SECE电路是提高压电能收获性能的有效策略.
- 该研究为优化FUC-PEH用于实际应用提供了设计指南.
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