Volume : 2, Issue : 5, May - 2013

Multicarrier PWM Technique for the Performance Improvement of Single Phase Five Level Inverter with Coupled Inductors

M. S. Sivagamasundari, Dr. P. Melba Mary

Abstract :

Multilevel inverter is a switching converter where the appropriate control of an arrangement of switching devices allows combining diverse input voltages to synthesize a sinusoidal output voltage waveform. In order to avoid the problems such as voltage balancing, higher total harmonic distortion and higher switching losses in conventional multilevel inverters, a new topology is proposed using coupled inductors. This paper deals with a single–phase five–level inverter using coupled inductors and the common three–arm power module. It improves the efficiency by avoiding voltage balancing, reducing total harmonic distortion and lower switching losses. Multicarrier pwm technique is being used in this proposed single phase five level inverter. The inverter can generate five voltage levels at its output terminals with only one dc source .The performance has been studied by the MATLAB/Simulink.