Impedance-Source DC-to-AC/DC Converter

Abstract

This article presents a novel impedance-source-based direct current (DC)-to-alternating current (AC)/DC converter (Z-Source DAD Converter). The Z-Source DAD converter converts the input DC voltage into AC or DC with buck or boost in the load voltage. This Z-Source DAD conversion circuit is a single-stage power conversion system. This converter circuit converts the input DC voltage into variable-magnitude output DC voltage or converts the DC voltage into a variable-magnitude output AC voltage. The higher voltage magnitude in boost mode can be controlled by controlling the shoot-through (ST) state timing of the converter. MATLAB-Simulink simulation and microcontroller-based hardware circuit results are presented to demonstrate power conversion with the buck and boost features of the Z-Source DAD converter for both types of output voltages. The simulation and experimental results show that the Z-Source DAD converter converts the given DC supply into AC or DC with buck or boost in the output load voltage.

Maximum Power Point Technique Integrated Impedance Source DC to AC/DC Converter

“…The Z-source inverter (ZSI) output AC voltage will be either more than or less than the given DC input [10]. Also, the ZSI output will always be AC voltage, whereas the Z-source DAD converter load voltage will be either AC voltage or DC voltage with increase or decrease in the load voltage [11]. This provides the flexibility to integrate the MPPT directly with this converter.…”