Power Generation Characteristics of Single Electrode Output Circuit in Electret Energy Harvester

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Bu, L.^1 ; Xu, H.Y.^1 ; Xu, B.J.^1 ; Song, L.^2

School of Information Engineering, China University of Geosciences, Beijing, China^1

State Grid Jibei Electric Power Co., Ltd., Beijing, China^2

关键词: 3-D numerical modeling;    Current sources;    Energy Harvester;    Output circuits;    Output power;    Single electrodes;    Sinusoidal vibration;    Two electrodes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012110/pdf
DOI  :  10.1088/1742-6596/557/1/012110

来源: IOP

【 摘 要 】

This paper reports the new output circuit using a single electrode in electret energy harvester, and proves that the single electrode is able to generate output power on grounded load. 3D numerical model of gap-closing type electret energy harvester is presented, and power generation characteristics are analysed and verified. Results show that the two electrodes are actually two independent current sources. Single electrode output circuit has two merits: when only one electrode is connected, it reduces wiring difficulty; when both electrodes are connected to grounded load respectively, it doubles output power compared with traditional output circuit. Using proposed circuit, maximal total power of 30mm×20mm prototype reaches 154.5μW@10Hz, 1.8mm sinusoidal vibration, and an LED has been successfully lighted up.