Performance and Evaluation of Three Phase Bridge Module Type Diode Clamped Multilevel Inverter

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2012 by IJETT Journal
Volume-3 Issue-3                          
Year of Publication : 2012
Authors :  C.R. Balamurugan , S. P. Natarajan , R.Bensraj


C.R. Balamurugan , S. P. Natarajan , R.Bensraj. "Performance and Evaluation of Three Phase Bridge Module Type Diode Clamped Multilevel Inverter". International Journal of Engineering Trends and Technology (IJETT). V3(3):380-389 May-Jun 2012. ISSN:2231-5381. published by seventh sense research group


This work proposes three phase five level Bridge module type Diode Clamped Multilevel Inverter (D CMLI) using various modulating techniques for induction motor load. These Pulse Width Modulat ing (PWM) techniques include Carrier Overlapping (CO) strategy, Variable Frequency ( VF) strategy, Phase Shift (PS ) strategy and Sub - Harmonic Pulse Width Modulation (SHPWM) i.e. Phase Disposition (PD) strategy, Phase Opposition Disposition (POD) strategy an d Alternate Phase Opposition Disposition (APOD) strategy. The Total Harmonic Distortion (THD), V RMS (fundamental), crest factor, form factor and distortion factor are evaluated for various modulation indices. Simulation is performed using MAT LAB - SIMULINK. It is observed that PODPWM /PSPWM method s provide output with relatively low distortion for R Load. It is also observed that PS PWM method provides output with relatively low distortion for IM load. COPWM is also found to perform better since i t provides relatively higher fundamental RMS output voltage for Induction Motor (IM) load and R load.


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