A Carrier Overlapping PWM Technique for Seven Level Asymmetrical Multilevel Inverter with various References

Johnson Uthayakumar R
2012 IOSR Journal of Engineering  
This paper presents the use of Control Freedom Degree (CFD) combination to evaluate the performance of single phase seven level Asymmetrical MultiLevel Inverter (AMLI) fed with resistive load. The effectiveness of the Pulse Width Modulation (PWM) strategies developed using CFD are demonstrated by simulation. The results are compared for sine, trapezoidal and Trapezoidal Amalgamated Reference (TAR) references in the Carrier Over Lapping (COPWM) strategy. By the different pattern of overlapping
more » ... rn of overlapping it is classified as carrier overlapping, Type-A, Type-B and Type-C. The Total Harmonic Distortion (THD) the Root Mean Square (RMS) value and Form Factor (FF) of output voltage are analyzed for modulation indices 0.7-1. The simulation results indicate that the use of CFD combination is an important clue to rea lize high performance multilevel inverters.
doi:10.9790/3021-026113011307 fatcat:z6mziso5hfep5nty3klvglufpq