Double synchronized switch harvesting (DSSH): a new energy harvesting scheme for efficient energy extraction

Nonlinear Conversion Enhancement for Efficient Piezoelectric Electrical Generators

“…Such a process therefore limits the voltage increase process (as no inversion is performed), hence limiting the conversion enhancement and therefore the harvested energy. (Lallart et al, 2008c):…”

“…Hence, thanks to its ability to control the amount of extracted energy through the intermediate electrostatic energy tank (intermediate capacitor), the DSSH technique is able to let mechanical energy entering into the system, contrary to fixed system, which, in spite of increasing the conversion abilities of materials, drastically limit the mechanical energy in the system, leading to moderate harvested energy. In this case, the harvested energy may be expressed as (Lallart et al, 2008c):…”

Self-Powered and Low-Power Piezoelectric Vibration Control Using Nonlinear Approaches

“…Many applications may benefit from this conversion ability increase, the most significative being energy harvesting from mechanical solicitations Lefeuvre et al, 2006a;Lallart & Guyomar, 2008b;Lallart et al, 2008c) and vibration control (e.g., for anechoic purposes ).…”

Ferroelectric Materials for Small-Scale Energy Harvesting Devices and Green Energy Products

“…Nevertheless, the SECE techniques does not allow controlling the trade-off between extracted energy and conversion improvement, as all the energy on the active material is extracted. The principles of the technique may be enhanced by combining the series SSHI approach with the SECE, leading to the DSSH technique (Lallart et al, 2008a). This scheme, depicted in Figure 10, consists in first extracting a part of the electrostatic energy on the piezoelectric or pyroelectric material on an intermediate capacitor C int , while the remaining energy is used to perform the voltage inversion leading to the conversion magnification.…”