LGEF, INSA-Lyon, Lyon, France.
IEEE Trans Ultrason Ferroelectr Freq Control. 2010;57(2):281-91. doi: 10.1109/TUFFC.2010.1408.
The purpose of this paper is to propose a new scheme for piezoelectric energy harvesting optimization. The proposed enhancement relies on a new topology for inverting the voltage across a single capacitor with reduced losses. The increase of the inversion quality allows a much more effective energy harvesting process using the so-called synchronized switch harvesting on inductor (SSHI) nonlinear technique. It is shown that the proposed architecture, based on a 2-step inversion, increases the harvested power by a theoretical factor up to square root of 2 (i.e., 40% gain) compared with classical SSHI, allowing an increase of the harvested power by a factor greater than 1000% compared with the standard energy harvesting technique for realistic values of inversion components. The proposed circuit, using only 4 digital switches and an intermediate capacitor, is also ultra-low power, because the inversion circuit does not require any external energy and the command signals are very simple.
本文旨在提出一种新的压电能量采集优化方案。所提出的增强方案依赖于一种新的拓扑结构，通过减少损耗来反转单个电容器上的电压。反转质量的提高允许使用所谓的同步开关电感采集（SSHI）非线性技术进行更有效的能量采集过程。结果表明，基于 2 步反转的所提出的架构与经典的 SSHI 相比，通过理论因子将采集的功率提高了平方根 2（即 40%的增益），与标准的能量采集技术相比，对于实际的反转组件值，允许采集的功率增加超过 1000%。所提出的电路仅使用 4 个数字开关和一个中间电容器，也超低功耗，因为反转电路不需要任何外部能量，并且命令信号非常简单。
