Silicon carbide inverter with two series Z-networks

The paper presents a concept of the three-phase DC/AC inverter with two impedance networks connected in series (2×Z) built with only Silicon Carbide power devices. Authors describe features of the novel inverter with special attention on serious reduction of voltages on applied Z-network capacitors. Benefits from application of SiC devices: JFETs and Schottky diodes are also discussed. Design and construction of the 2kVA/3×400V RMS laboratory model is shown. Finally, authors prove concept by simulation and experimental tests at 100kHz switching frequency.