An Efficient AC-DC Step-Up Converter for Low-Voltage Piezoelectric Micro Power Genrator Energy Harvesting

This project presents an efficient ac to-dc power converter that avoids the bridge rectification and directly converts the low ac input voltage to the required high dc output voltage at a higher efficiency. The proposed converter consists of a sepic converter and a cuk converter, which are operated in the positive half cycle and negative half cycle, respectively. Based on the control schemes are proposed to operate the converter. Simulation results are presented to validate the proposed converter topology and control schemes.