Purpose

The purpose of this research paper is to explore the possibility to enhance the power transfer from piezoelectric energy harvester (PEH) source to the load. As the proposed gyrator-induced voltage flip technique (GIVFT) does not require bulky components such as physical inductors, it is easily realizable in small integrated circuits (IC) package thereby offering performance benefits, reducing area overhead and providing cost benefits for constrained self-powered autonomous Internet-of-Things (IoT) applications.

Design/methodology/approach

This paper presents an inductorless interface circuit for PEH. The proposed technique is called GIVFT and is demonstrated using active elements. The authors use gyrator to induce voltage flip at the output side of PEH to enhance the charge extraction from PEH. The proposed technique uses the current-voltage (I-V) relationship of gyrator to get appropriate phasor response necessary to induce the voltage flip at the output of PEH to gain power transfer enhancement at the load.

Findings

The experimental results show the efficacy of the GIVFT realization for enhanced power extraction. The authors have compared their proposed design with popular earlier reported interface circuits. Experimentally measured performance improvement is 1.86×higher than the baseline comparison of full-wave bridge rectifier circuit. The authors demonstrated a voltage flip using GIVFT to gain power transfer improvement in piezoelectric energy harvesting.

Originality/value

To the best of the authors’ knowledge, pertaining to the field of PEH, this is the first reported GIVFT based on the I-V relationship of the gyrator. The proposed approach could be useful for constrained self-powered autonomous IoT applications, and it could be of importance in guiding the design of new interface circuits for PEH.

中文翻译：

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使用回转器感应电压翻转技术的无电感压电能量收集接口电路

目的

本研究论文的目的是探索增强从压电能量收集器 (PEH) 源到负载的功率传输的可能性。由于所提出的回转器感应电压翻转技术 (GIVFT) 不需要物理电感器等体积庞大的元件，因此它可以很容易地在小型集成电路 (IC) 封装中实现，从而提供性能优势、减少面积开销并为受限的自我提供成本优势供电的自主物联网 (IoT) 应用程序。

设计/方法/途径

本文介绍了一种用于 PEH 的无电感器接口电路。所提议的技术称为 GIVFT，并使用有源元素进行了演示。作者使用回转器在 PEH 的输出侧感应电压翻转，以增强从 PEH 的电荷提取。所提出的技术使用回转器的电流-电压 (IV) 关系来获得必要的适当相量响应，以在 PEH 的输出端引起电压翻转，从而增强负载处的功率传输。

发现

实验结果显示了 GIVFT 实现增强功率提取的功效。作者将他们提出的设计与流行的早期报告的接口电路进行了比较。实验测得的性能提升比全波桥式整流电路的基线比较高1.86倍。作者展示了使用 GIVFT 的电压翻转，以获得压电能量收集中的功率传输改进。

原创性/价值

据作者所知，在 PEH 领域，这是首次报道基于回转器 IV 关系的 GIVFT。所提出的方法可能对受约束的自供电自主物联网应用有用，并且对于指导 PEH 的新接口电路设计可能具有重要意义。