School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China.
Institute of Precision Machinery, Zhejiang Normal University, Jinhua, China.
Rev Sci Instrum. 2023 Mar 1;94(3):035004. doi: 10.1063/5.0131504.
In this paper, a piezoelectric electromagnetic composite energy harvester is studied. The device consists of a mechanical spring, upper and lower base, magnet coil, etc. The upper and lower bases are connected by struts and mechanical springs and secured by end caps. The device moves up and down under the vibration of the external environment. As the upper base moves downward, the circular excitation magnet moves downward, and the piezoelectric magnet is deformed under a non-contact magnetic force. Traditional energy harvesters have the problems of a single form of power generation and inefficient energy collection. This paper proposes a piezoelectric electromagnetic composite energy harvester to improve energy efficiency. Through theoretical analysis, the power generation trends of rectangular, circular, and electric coils are obtained. Simulation analysis yields the maximum displacement of the rectangular and circular piezoelectric sheets. The device uses piezoelectric power generation and electromagnetic power generation to achieve compound power generation, improve the output voltage and output power, and can provide power supply to more electronic components. By introducing the nonlinear magnetic action, the mechanical collision and wear of the piezoelectric elements during the work are avoided, so that the service life and service life of the equipment is extended. The experimental results show that the highest output voltage of the device is 13.28 V when the circular magnets mutually repel rectangular mass magnets and the tip magnet of the piezoelectric element is 0.6 mm from the sleeve. The external resistance is 1000 Ω, and the maximum power output of the device is 5.5 mW.
本文研究了一种压电电磁复合能量收集器。该装置由机械弹簧、上底座、下底座、磁线圈等组成。上底座和下底座通过支柱和机械弹簧连接，并由端盖固定。该装置在外环境振动下上下移动。当下底座向上移动时，圆形激励磁铁向下移动，在非接触磁力作用下，压电磁铁发生变形。传统的能量收集器存在发电形式单一、能量收集效率低的问题。本文提出了一种压电电磁复合能量收集器，以提高能量效率。通过理论分析，得到了矩形、圆形和电线圈的发电趋势。通过仿真分析，得到了矩形和圆形压电片的最大位移。该装置采用压电发电和电磁发电实现复合发电，提高了输出电压和输出功率，可为更多的电子元件提供电源。通过引入非线性磁作用，可以避免压电元件在工作过程中的机械碰撞和磨损，从而延长设备的使用寿命和寿命。实验结果表明，当圆形磁铁相互排斥矩形质量磁铁且压电元件的尖端磁铁距套管 0.6mm 时，该装置的最高输出电压为 13.28V，外部电阻为 1000Ω，该装置的最大输出功率为 5.5mW。
