Enervate carrier LS-PWM for reducing harmonic distortions in SCHB-MLI

Abstract

Among the different modulation techniques, pulse width modulation is one of the major renowned modulation strategies, because the pulses are generated based on reference signal and the reference signal is sinusoidal. Many modifications are made in this strategy since the PWM era starts in the area of power electronics; the modifications are related with the reference or carrier. This paper also discusses about the analysis with performance parameters when the carrier is modified with the impact of hysteresis band structures. The modified carrier is abridged towards the zero line of actual carrier; this type of carrier supports the reduction of the switching losses at the edge of pulse train and also reduces the total harmonic distortions from the converter output signal. The lower switching losses and better harmonic profile elevate the inverter performance; in this paper, Symmetrical Cascaded H-Bridge Multilevel Inverter is analysed with the proposed enervate carrier associated to level shift pulse width modulation.