MATLAB simulation based analysis of eleven-level diode clamped inverter with sinusoidal PWM

This paper deals with study of 3-Φ Eleven Level inverter feeding Three-Phase Balanced Loads at different carrier frequencies. Eleven level Inverter is realized by Diode-Clamped Multi-level topology. We can select of topology and control schemes according to power demands of inverter. A multilevel inverter can be used for multipurpose applications i.e. an active power filter, a static VAR compensator and a machine drive for sinusoidal and trapezoidal current applications. As the No. of levels increases the quality of the output voltage waveform increases and there is reduction in EMI/RFI generation. The Multilevel inverter is used to reduce the harmonics and can generate high quality voltage waveforms. The control signals for the IGBT's are generated by the Phase Disposition scheme of Sinusoidal PWM technique. The FFT spectrums for the output voltage and current are analyzed to study the reduction in the harmonics