An Efficient Full-wave and Switched-capacitor-based AC-DC-DC Converter Configuration; Applicable for High Voltage Gain Industrial Utilizations

Abstract

Power electronics circuits are one of the vital and important parts of the industrial applications, where different levels of the DC and AC voltages and currents are necessary to be applied to the different electronic and electrical devices and machines including the test approaches or working under industrial voltages. Meanwhile, many of these devices are designed to work under a certain and fixed industrial level of voltages like 48VDC, 24VDC, 12VDC or 5VDC, but sometimes, another levels of the voltage for a special device can be an issue. Therefore, the converting an AC voltage to a fixed, controllable and robust DC voltage under different level of the load values is necessary. Furthermore, the variation of the input AC voltage also should be considered and the load DC voltages should be hold fixed. This paper uses a Full-wave rectifier circuit to convert the AC voltage to the DC voltage and in the next step this voltage is enhanced and fixed by using a DC-DC step-up converter. Both rectifier and boost converters are high gain since sometimes it is necessary to convert the grid 220VAC to a small DC voltage or enhance a small DC to a higher DC voltage. The proposed converter can be used separately as a high gain AC-DC rectifier or a high gain DC-DC converter, or the combination of the proposed converters can be used to reach a desired DC voltage through an input AC voltage. It can be considered depending on the area where the converter is used. Theoretical analysis is presented and simulation results confirm the correctness of the topology under different working conditions.