Equivalent circuit model of an impact-based piezoelectric energy harvester

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

物理学;能源学

Kim, S.H.^1 ; Ju, S.^1 ; Ji, C.H.^1 ; Lee, S.J.^1

Department of Electronics Engineering, Ewha Womans University, 52, Ewhayeodae- gil, Seodaemun-gu, Seoul, Korea, Republic of^1

关键词: Asymmetric structures;    Conversion circuits;    Equivalent circuit model;    High frequency components;    Low-frequency vibration;    Mechanical impacts;    Oscillating signal;    Piezoelectric energy harvesters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012094/pdf
DOI  :  10.1088/1742-6596/557/1/012094

来源: IOP

【 摘 要 】

This paper presents an equivalent circuit model of an impact-based piezoelectric energy harvester. The harvester alternately generates two different shapes of damped- oscillating signals due to the asymmetric structure of the device. Those signals have strong high frequency components through mechanical impact from low frequency vibration. Equivalent circuit model with dual voltage source is proposed to precisely describe the behaviour of the harvester. The simulation results of the harvester with typical conversion circuits were compared with measurement data to verify the correctness of proposed model.