Design and Simulation of Nested Multilevel Topologies

This project deals with design and simulation of multilevel topology based on the concept of nested arrangement. It has the advantages of reduced number of diodes and consequently gives higher efficiency as compared to the equivalent neutral point clamped inverter (NPC) topology. This method presents an optimized pulse width modulation strategy that provides synthesizing voltage waveforms with higher quality, and losses comparison with NPC topology. The simulation of Nested multilevel topology is to be done for 4, 5&6 levels and performance is to be compared in terms of total harmonic distortion (THD). Also, the PMSM motor is to be fed with this nested multilevel converter with different output voltage levels and performance comparison is to be accomplished in terms of torque ripples. The simulation is performed using MATLAB/Simulink software. KeywordsDC-AC power converters, multi-level inverters, power electronics, pulse width modulation technique, permanent magnet synchronous motor.