Analysis and performance evaluation of Hysteresis based Modified Carrier LS-PWM modulated SCHB-MLI

Abstract

Over the different Modulation Techniques, Pulse Width Modulation is one of the major renowned modulation strategy, because the pulses are generated based on reference signal and the reference signal is sinusoidal. So many modifications are made in this strategy since PWM era starts in the area of Power Electronics, the modifications are like with the reference or carrier. This paper also discussed about the analysis with performance parameters when the carrier is modified with the impact of Hysteresis Band structures. The Hysteresis based Modified Carrier is abridged towards the origin of actual carrier, this type of carrier is supports to reduce the switching losses in trail and bad edges of pulse train and also reduce the total harmonic distortions from the converter output signal. The lower switching losses and better harmonic profile elevates the inverter performance, in this paper Symmetrical Cascaded H-Bridge Multilevel Inverter is analyzed with the proposed Hysteresis based Modified Carrier associated to Level Shift Pulse Width Modulation.