Single-Phase Nine-Level Inverter with Novel Pulse Width Modulation Scheme for Resistive-Inductive Load
Journal Title: American journal of Engineering Research - Year 2016, Vol 5, Issue 2
Abstract
A single-phase nine-level inverter with a novel pulse width modulation (PWM) scheme for R-L load is presented in this paper. Four triangular carrier signals that are identical to each other with an offset that is equivalent to the amplitude of the sinusoidal reference signal were used to generate the PWM signals. The inverter is capable of producing nine levels of output-voltage levels (Vdc, Vdc/4, Vdc/2, 3Vdc/4, 0,−Vdc,−Vdc/4,−Vdc/2, 3Vdc/4) from the dc supply voltage. In this paper the dc supply is obtained from ac supply which is boosted to a higher amplitude of dc voltage using dc to dc converter. In this paper, Matlab/ Simulink software is used for the system simulation. Hence, the output load voltage, current and FFT plots are obtained. This paper is focused on minimizing the number of semiconductors devices, weights, and costs for a higher number of output voltage levels. Index Terms: Boost converter, modulation index, multilevel inverter, pulse width-modulation (PWM), total harmonic distortion (THD).
Authors and Affiliations
Gerald C. Diyoke, 1, I. K. Onwuka
Keywords
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