Fault-tolerant magnetic coupling topology for network parallel multilevel inverters

This paper presents a study of a fault-tolerant magnetic coupling topology for a network parallel multilevel inverter in aircraft applications. The modeling, the sizing, and the design of the Secondary Loop topology are developed for 15 kW/phase. Then, the experimental results are compared to the simulations in an open-loop study. For the closed-loop study, a linear dynamic model of the inverter is discussed to ensure the balancing of the leg currents. Finally, this topology is tested in terms of fault tolerance due to the loss of a leg, in open loop and in closed-loop control, showing promising results.