engleski

Power Losses Analysis of a Three-phase Quasi-Z- Source Inverter

This paper presents the power losses analysis of a three-phase quasi-Z-source inverter. The analysis is based on experimental measurements. For that purpose, the laboratory setup of the considered inverter operating in a stand-alone mode was built. The total inverter power losses have been obtained as a difference between the measured input and output powers of the inverter. The power losses of the inductors in the impedance network were determined based on the measured respective currents and parasitic resistances, switching frequency, and available inductor core data. On the other hand, the power losses of the capacitors in the impedance network were neglected due to low equivalent series resistance of the utilized polypropylene capacitors. The remaining losses were ascribed to semiconductor losses. Following these assumptions, the power losses distribution and the efficiency of the considered inverter were determined over wide ranges of switching frequency, input voltage, shoot-through duty cycle, and phase current RMS value.

experimental measurements ; losses distribution ; quasi-Z-source inverter ; semiconductor losses

Ovaj je rad financirala Hrvatska zaklada za znanost projektom (IP-2016-06-3319)