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A piezoelectric self-powered active interface for AC/DC power conversion improvement of electromagnetic energy harvesting
Smart Materials and Structures ( IF 4.1 ) Pub Date : 2020-09-29 , DOI: 10.1088/1361-665x/abadd3
G Lombardi 1 , M Lallart 1 , M Kiziroglou 2 , E M Yeatman 2
Affiliation  

In the framework of hybrid energy harvesting for scavenging ambient motion, this paper proposes a cooperative piezoelectricelectromagnetic energy harvesting system to harvest rotational energy. In particular, while the actual process of harvesting energy is accomplished by the electromagnetic device, the piezoelectric element is used for improving the AC/DC conversion efficiency of the former. To do so, a half wave voltage doubler using MOSFETs driven by the piezoelement is employed. The low voltage output (order of magnitude of mV) of the electromagnetic system and the low conversion abilities of the piezoelectric transducer in the proposed mechanical structure justifies the motivation behind this work. Simulations followed by experimental validations are exposed and discussed, highlighting the improvement of energy conversion efficiency of an electromagnetic transducer, giving a power gain of 27 with respect to the DC power obtained with standard silicon diodes.

中文翻译:

压电自供电有源接口,用于改善AC / DC功率转换的电磁能量收集

在混合能量收集的框架下,本文提出了一种协同压电电磁能量收集系统来收集旋转能量。特别地,虽然通过电磁装置完成能量的实际收集过程,但是压电元件用于提高前者的AC / DC转换效率。为此,采用了使用由压电元件驱动的MOSFET的半波电压倍增器。电磁系统的低电压输出(mV量级)和所提出的机械结构中压电换能器的低转换能力证明了这项工作的动机。进行了模拟和实验验证,并进行了讨论,
更新日期:2020-09-30
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