Improvement in Switching Strategy Used for Even Loss Distribution in ANPC Multilevel Inverter

This paper discusses how the even loss distribution among semiconductor devices and DC link capacitor voltage balancing by using Active Neutral Point Clamped (ANPC) multilevel inverter switching states. The main drawbacks of the Neutral Point Clamped (NPC) inverter are the unequal loss distribution among semiconductor devices and DC link capacitor voltage unbalancing. To overcome these drawbacks, switching state redundancy is required to evenly distribute the losses and the DC link capacitor voltage balances naturally under those redundant switching states. The Three Level topology is taken as the reference for NPC and ANPC multilevel inverter. This analysis is represented with the simulation results. At last the switching gate pulses from dSPACE DS 1104 and hardware implementation and the results are represented.