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Enhancement of Galloping-based Wind Energy Harvesting by Synchronized Switching Interface Circuits

机译：同步开关接口电路增强基于舞动的风能收集

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Galloping phenomenon has attracted extensive research attention for small-scale wind energy harvesting. In the reported literature, the dynamics and harvested power of a galloping-based energy harvesting system are usually evaluated with a resistive AC load; these characteristics might shift when a practical harvesting interface circuit is connected for extracting useful DC power. In the family of piezoelectric energy harvesting interface circuits, synchronized switching harvesting on inductor (SSHI) has demonstrated its advantage for enhancing the harvested power from existing base vibrations. This paper investigates the harvesting capability of a galloping-based wind energy harvester using SSHI interfaces, with a focus on comparing the performances of Series SSHI (S-SSHI) and Parallel SSHI (P-SSHI) with that of a standard DC interface, in terms of power at various wind speeds. The prototyped galloping-based piezoelectric energy harvester (GPEH) comprises a piezoelectric cantilever attached with a square-sectioned bluff body made of foam. Equivalent circuit model (ECM) of the GPEH is established and system-level circuit simulations with SSHI and standard interfaces are performed and validated with wind tunnel tests. The benefits of SSHI compared to standard circuit become more significant when the wind speed gets higher; while SSHI circuits lose the benefits at small wind speeds. In both experiment and simulation, the superiority of P-SSHI is confirmed while S-SSHI demands further investigation. The power output is increased by 43.75% with P-SSHI compared to the standard circuit at a wind speed of 6m/s.
机译：舞动现象引起了小型风能收集的广泛研究关注。在已报道的文献中，基于奔腾的能量采集系统的动力学和采集功率通常是通过电阻性交流负载进行评估的。当连接实用的采集接口电路以提取有用的DC电源时，这些特性可能会发生变化。在压电能量收集接口电路系列中，电感器上的同步开关收集（SSHI）已显示出其从现有基础振动中增强收​​集功率的优势。本文研究了使用SSHI接口的基于疾驰的风能采集器的采集能力，重点是将SSHI系列（S-SSHI）和并行SSHI（P-SSHI）与标准DC接口的性能进行比较。各种风速下的功率项。原型基于疾驰的压电能量收集器（GPEH）包括一个压电悬臂，该悬臂连接有一个由泡沫制成的方形截面的非流线形体。建立了GPEH的等效电路模型（ECM），并使用SSHI和标准接口进行了系统级电路仿真，并通过风洞测试进行了验证。当风速变高时，与标准电路相比，SSHI的优势变得更加明显。而SSHI电路在小风速下却失去了优势。在实验和仿真中，都证实了P-SSHI的优越性，而S-SSHI需要进一步研究。在风速为6m / s的情况下，与标准电路相比，P-SSHI的功率输出提高了43.75％。

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