Comparative analysis of inverter topologies for 400Hz Ground Power Unit

Abstract

This paper presents a survey research, analysis, and comparison of the performance of three three-phase inverter circuit topologies applied to GPU ground power supplies in the aviation industry. One of the prominent characteristics of aircraft load systems is their unbalance; therefore, evaluating the operational performance and output voltage quality of the power supply under unbalanced load conditions for these three inverter circuit topologies is the main focus of this research. Additionally, several other parameters such as DC voltage and the input DC filter capacitance utilization are also analyzed and compared. The simulation results using Matlab software demonstrate that the three-single-phase H-bridge topology provides the highest efficiency, maintaining the best output voltage quality, especially under conditions of unbalanced load, thus opening up a new design direction for GPU power supplies for aircraft.