A large bande frequencies AC/DC SSHIC Electrical Interface for Piezoelectric Sensors and Energy Harvesting

Abstract

The harvesting energy from the vibration of piezoelectric beam or membrane producing an alternating voltage, requires a passive AC/DC converter to avoid energy losses, and to adapt the electrical signal to the input parameters (voltage, current). The objective of this work is to demonstrate a complete AC/DC converter autonomous system which is powered by a piezoelectric energy harvester. Accordingly, the proposed rectifier has several advantages in terms of efficiency, compatibility, circuit simplicity, and integration into various systems. The AC-DC converter for piezoelectric energy harvesting applications presented in this paper is an improved version of the Synchronized Switch Harvesting on Inductor Corrected (SSHIC) Converter. This modified version provides better results of up to 56% for technology parallel SSHIC-p and 51% for technology series SSHIC-s compared to input power. In addition, it is better in terms of efficiency more than 220% compared to the bridge rectifier with relatively stable output despite varying conditions. In addition, the structures vibrating in sinusoidal or pseudo sinusoidal mode, thus being able to be modeled by a second order. This model is well suited to broadband stresses of multimodal structures.