A Review Paper on Comparative Study of Different Level Shifted Multicarrier PWM Techniques Implemented on a 15 Level Asymmetric H-Bridge Multilevel Inverter
Keywords:
Alternative phase opposition disposition pulse width modulation (APOD-PWM), multilevel inverter (MLI), phase disposition pulse width modulation (PD-PWM), phase opposition disposition pulse width modulation (POD-PWM), IM (induction motor) load, total harmonic distortion (THD)Abstract
For medium voltage and high-power application generally, multilevel inverter is used as an
energy conversion device. Advantages of multilevel inverter are lower switching losses, total
harmonic distortion, less voltage stress on switches than conventional inverter. This review
paper presents a comparative study of performance parameters when different level shifted
multicarrier Pulse Width Modulation (PWM) techniques are implemented on a 15-level
asymmetric H-bridge multilevel inverter using a topology having less number of switches
with different loading conditions. Three modulation techniques have been used here. The
techniques used are PD-PWM, POD-PWM, and APOD-PWM. Here R, R-L and IM loads are
used. The operation is simulated in MATLAB SIMULINK. The FFT analysis of the three
modulation techniques used has been done when implemented on different loads and their
respective THD data has been tabulated.
