同步電荷提取自動電路設計及其在轉動式壓電振能擷取之應用

Application of Synchronized Electric Charge Extraction Circuit to Rotational Piezoelectric Energy Harvesting

張軒嘉(Hsuan-Chia Chang)

指導教授 ： 舒貽忠

國立臺灣大學/工學院/應用力學研究所/碩士(2018年)

https://doi.org/10.6342/NTU201803819

摘要

本論文旨在探討同步電荷提取開關的自動切換電路設計，因為過往團隊以外加控制訊號來決定電路開關開啟的時機，然而該方法若應用於陣列架構，會有因必須同時監控多根振子導致無法精確判斷開關開啟時機。故藉由自動切換電路的運行，除可改善外加控制訊號操作困難等問題，並可延伸至非單一弦波週期性振盪狀態的旋轉式磁激振模型實驗，來進行同步電荷提取能量擷取之研究。根據設計，該自動切換電路覆蓋本團隊實驗所需的頻率區間。而實驗結果顯示，由同步電荷提取自動切換電路操控的發電功率與理論預測是相符合的。另外該切換電路對於開關開啟的時間誤差，也低於原先以外加控制訊號操控的誤差，證實了所開發的自動切換電路足以取代傳統由外加控制訊號開啟電路開關的操作方式。

關鍵字

控制電路 ； 壓電振動能量擷取 ； 同步電荷提取介面開關切換 ； 旋轉式磁激振 ； 發電功率

並列摘要

The present thesis is focus on the auto circuit design for controlling the synchronized electric charge extraction (SECE) switch. The conventional approach for the SECE switch control is to use the external signal to monitor it. However, such an approach may not be applied to the case of multiple oscillators due to the difficulty in monitoring the electric response of each oscillator. Thus, the circuit development of switch control can not only resolve such a difficulty but also can be extended to the cases of periodic excitations of multiple signals. This includes the case of implementing an SECE interface circuit to extract energy from rotatory magnetic plucking. Our design shows the working frequency of the proposed circuit covers the resonant frequencies of the cantilever bimorphs used in our laboratory. Next, the measured harvested power output based on the proposed controller circuit agrees quite well with the theoretical predictions. In addition, the error for controlling the switching period is less than that based on the external monitoring, confirming the feasibility of the proposed controller circuit.

並列關鍵字

controller circuit ； piezoelectric energy harvesting ； SECE (synchronized electric charge extraction) switch control ； rotatory magnetic plucking ； power output

參考文獻

[1]Li, B. and You, J. H. (2015). Experimental Study on Self-Powered Synchronized Switch Harvesting on Inductor Circuits for Multiple Piezoelectric Plates in Acoustic Energy Harvesting. Journal of Intelligent Material Systems and Structures, 26, 1646–1655.

[2] Cao, J. Y., Ren, X. L., Zhou, S. X. and Cao, B. G. (2012). Vibration Energy Harvesting Based on Synchronized Switch Control of Parallel Inductor. Journal of Vibration and Shock 31:17.

[3] Zhao, L., Tang, L., Wu, H. and Yang, Y. (2014) Synchronized Charge Extraction for Aeroelastic Energy Harvesting. Proc. of SPIE ,Vol. 9057 90570N-1

[4] Zhao, L., Tang, L. and Yang, Y. (2016). Synchronized Charge Extraction in Galloping Piezoelectric Energy Harvesting. Journal of Intelligent Material Systems and Structures, 27: 453-468.

[5] Leland, E. S. and Wright, P. K. (2006). Resonance Tuning of Piezoelectric Vibration Energy Scavenging Generators Using Compressive Axial Preload. Smart Materials and Structures. 15, 1413-1420.