Electrostatic vibration energy harvester using an electret-charged mems transducer with an unstable auto-synchronous conditioning circuit

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Karami, Armine^1 ; Basset, Philippe^2 ; Galayko, Dimitri^1

Sorbonne Universités, UPMC Univ Paris 06, CNRS, LIP6, Paris, France^1

ESIEE-Paris, Université Paris-Est Marne-la-Vallée, Noisy-le-Grand, France^2

关键词: Autosynchronous;    Charge voltage;    Conditioning circuit;    Doublers;    Low voltages;    Pre-charge;    Vibration energy harvesters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012025/pdf
DOI  :  10.1088/1742-6596/660/1/012025

来源: IOP

【 摘 要 】

This paper reports for the first time experiments using an electrostatic vibration energy harvester comprised of a low voltage electret-charged MEMS transducer joined to an unstable autosynchronous conditioning circuit with rectangular charge-voltage characteristic, also known as the Bennet's doubler conditioning circuit. The experimental results show that the electret voltage, even if of low value, can be used as the necessary pre-charge for these type of electrostatic vibration energy harvesters. Also, the use of such a conditioning circuit with a low-voltage electret capacitive MEMS tranducer instead of the previously-reported conditioning circuits with direct connection to load or through a rectifier, can be advantageous in terms of maximal harvested power for a low-voltage electret, showing up to 95% higher converted power.