Equivalent circuit analysis of the galloping-based piezoelectric energy harvester with a passive turbulence control cylinder

被引：0
|
作者：
Jin Z. [1 ]
Li G. [1 ]
Geng L. [1 ]
Wang J. [1 ]
机构：
[1] School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 09期
关键词：
Equivalent circuit; Galloping; Piezoelectric energy harvesting;
D O I：
10.13465/j.cnki.jvs.2020.09.029
中图分类号：
学科分类号：
摘要：
In order to better predict the performance of the galloping piezoelectric energy harvester, an equivalent circuit simulation model (ECM) was established and verified by experiments, with a maximum discrepancy of less than 10%, by which the cylindrical galloping piezoelectric energy collection under passive turbulence control (PTC) was analyzed. The parameters of the mass-spring-damping (M-C-K) galloping control equation for the energy conversion system were expressed by the corresponding equivalent circuit electronic elements. Thus, this makes it possible to analyze the DC circuit coupling that cannot be solved by the past simulation means. The variation of the critical wind (Ucr) along with the external connected load and the output voltage and power at different wind speeds and under different external load were analyzed from the perspective of energy harvesting efficiency in AC-DC equivalent circuit. The results show that Ucr increases and then decreases with the increase of load in the AC circuit, and Ucr decreases with the increase of load in the DC circuit. When the wind speed reaches the maximum value of Ucr, the galloping occurs under any resistance. When U≥Ucr, the galloping phenomenon occurs, and the output voltage and power increase with the increase of the wind speed. The growth rate has a decreasing trend at high wind speeds. With the increase of the resistance, the output voltage increases, and the power first increases and then decreases. Comparing to AC circuits, the optimum load of the DC circuit is increased from 1.1 to 2.0 MΩ, while the power peak is reduced from 0.08 to 0.04 mW. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：207 / 213
页数：6
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