Synchronized Triple Bias-Flip Interface Circuit for Piezoelectric Energy Harvesting Enhancement
Synchronized Triple Bias-Flip Interface Circuit for Piezoelectric Energy Harvesting Enhancement
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DOI：
10.1109/tpel.2018.2815922
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发表时间：
2019-01-01
影响因子：
6.7
通讯作者：
Zhao, Kang
中科院分区：
文献类型：
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作者：
Liang, Junrui;Zhao, Yuheng;Zhao, Kang
功率调节接口电路在提高压电EH（PEH）系统的能量收集（EH）能力方面起着至关重要的作用。在同步多偏置翻转（SMBF）模型下，总结了现有同步开关电路增强PEH的原理。SMBF的最佳偏置翻转策略为未来的电路发展提供了有价值的见解。基于这样的理论基础，本文实现了一种新的接口电路，称为并行同步三重偏置翻转（P-S3 BF），以进一步提高收获能力超越国家的最先进的解决方案。通过反复分配更多的偏置翻转动作，它在更高的提取功率和更低的功率调节耗散功率之间做出了最佳折衷，以实现最大的净收获功率。此外，P-S3 BF中的偏置电压基准是独立的和自适应的。与其他现有的涉及有源电压操纵的解决方案相比，P-S3 BF带来的这两个便利是最重要和必要的特征，这有利于P-S3 BF在不同周期振动下的实际独立实施。实验结果表明，在使用的压电悬臂梁，在一个恒定的偏转幅度振动，P-S3 BF电路收获的功率比它的单偏置翻转对应的，广泛研究的并联同步开关收获电感多24.5%，比它的零偏置翻转对应的，标准的EH桥式整流器多287.6%的功率。
The power conditioning interface circuit plays a crucial role in the energy harvesting (EH) capability enhancement in piezoelectric EH (PEH) systems. The principle of most existing synchronized switch circuits for PEH enhancement was summarized under the recently introduced synchronized multiple bias-flip (SMBF) model. The optimal bias-flip strategy derived from SMBF provides valuable insights for future circuit development. Based on such theoretical foundation, this paper implements a new interface circuit called the parallel synchronized triple bias-flip (P-S3BF) for further boosting the harvesting capability beyond the state-of-the-art solutions. By sophisticatedly allocating more bias-flip actions, it makes the best compromise between higher extracted power and lower dissipated power for power conditioning, toward maximum net harvested power. Moreover, the bias voltage reference in P-S3BF is self-contained and self-adaptive. Compared to the other existing solutions involving active voltage manipulations, these two conveniences brought in by P-S3BF are the most significant and necessary features, which facilitate the practical stand-alone implementation of P-S3BF under different periodic vibrations. Experimental result shows that, with the piezoelectric cantilever in use, which vibrates at a constant deflection magnitude, the P-S3BF circuit harvests 24.5% more power than its single bias-flip counterpart, the extensively studied parallel synchronized switch harvesting on inductor; and 287.6% more power than its null bias-flip counterpart, the standard EH bridge rectifier.