Short Circuit Synchronous Electric Charge Extraction (SC-SECE) Strategy for Wideband Vibration Energy Harvesting

A. Morel, P. Gasnier, Y. Wanderoild, G. Pillonnet, A. Badel
2018 2018 IEEE International Symposium on Circuits and Systems (ISCAS)  
This paper presents an energy harvesting strategy called Short Circuit Synchronous Electric Charge Extraction (SC-SECE), which is an improvement of the SECE strategy for highly coupled piezoelectric generators. The SC-SECE strategy is based on the control of a short-circuit through two tuning parameters. The first one, , represents the phase between the displacement extrema and the energy harvesting event. The second, , is the angle difference between the beginning and end of the short-circuit
more » ... hase. The performance of this strategy has been compared to other interfaces such as the SECE and the capacitance tuning approach. However, with the SC-SECE strategy, both the power and bandwidth are greatly improved. Experimental measurements have been performed on a highly-coupled piezoelectric harvester (k m 2 =0.48) which provides a maximal harvestable power P lim of 6µW under an extremely low vibration amplitude (0.03G). We have been able to harvest more than 50% of this P lim over a large frequency band, from 90Hz to 140Hz. These results demonstrate the excellent potential of this strategy for extending the bandwidth of piezoelectric vibration energy harvesters.
doi:10.1109/iscas.2018.8351559 dblp:conf/iscas/MorelGWPB18 fatcat:afwufqdezfa7tk7zzeg6pngggu