一种用于压电振动能量收集器的负载阻抗模拟主动接口
A Load Impedance Emulation Active Interface for Piezoelectric Vibration Energy Harvesters
AI总结：
本文提出了一种无需复杂控制的压电振动能量收集器主动接口，通过模拟最佳负载阻抗实现稳态和动态条件下的最大功率点工作。
摘要：
本文提出了一种单级主动交流/直流接口，能够模拟谐振压电振动能量收集器（RPVEH）的最佳负载阻抗。理论上表明，与模拟最佳负载发生器的电子接口不同，模拟最佳负载阻抗的接口不需要适应输入振动的加速度。这允许使用非常简单的控制，避免实现需要有损耗微控制器的最大功率点跟踪（MPPT）算法。因此，所提出的接口配备了简单的模拟控制器，使RPVEH能够在稳态和振动变化条件下均在其最大功率点（MPP）工作，而无需采用多变量扰动方法，这在文献中大多数单级AC/DC接口中是常见的。没有扰动技术的存在使静态和动态性能都得到了显著提升。所提出接口原型的实验测试证实了理论发现和预测行为。
英文摘要：
A single stage active AC/DC interface able to emulate the optimal load impedance of a Resonant Piezoelectric Vibration Energy Harvester (RPVEH) is proposed. As theoretically shown, unlike an electronic interface that emulates an optimal load generator, an interface that emulates an optimal load impedance does not require adaptation to the acceleration of input vibrations. This allows the use of a very simple control, avoiding the implementation of Maximum Power Point Tracking (MPPT) algorithms that require lossy microcontrollers. Thus, the proposed interface is equipped with a simple analog controller allowing the RPVEH to work in its Maximum Power Point (MPP) in both steady-state and variable conditions of vibrations, without recurring to multivariable perturbative approaches, as it happens for the most of single stage AC/DC interfaces proposed in the literature. The absence of perturbative techniques allows a significant improvement of both stationary and dynamic performances. Experimental tests of a prototype of the proposed interface confirm the theoretical findings and the predicted behavior.
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