A NEW FOUR-QUADRANT INVERTER BASED ON DUAL-WINDING ISOLATED CUK CONVERTERS FOR RAILWAY AND RENEWABLE ENERGY APPLICATIONS

Abstract

The paper presents a new four-quadrant converter based on dual-winding isolated Cuk converters. The proposed converter can operate as a DC/DC converter, DC/AC inverter or AC/DC rectifier. The new converter offers important merits such as losses reduction, voltage boosting, flexible output voltage range, passive element reduction and galvanic isolation with small-size high-frequency transformers. If the proposed converter output is applied to a DC motor, providing the possibility of motoring, braking and regenerative braking if required. In addition, the converter offers the possibility to generate AC voltages and currents if it is employed in renewable energy systems as a DC/AC inverter. The paper presents the description of the converter with the associated mathematical analysis. Simulation results are obtained using MATLAB/SIMULINK software while experimental results are obtained using a scaled down prototype, controlled by TMS320F28335DSP.