Abstract—This paper proposes an analytical procedure for computation of all pairs of valid switching angles used in pattern generation in nine-level H-bridge cascaded inverters. The proposed procedure eliminates harmonic components from inverter output voltage and, for each harmonic, returns the exact boundaries of all valid modulation index intervals. Due to its simple mathematical formulation, it can be easily implemented in real time using a digital signal processor or a fieldprogrammable gate array. In this paper, after a detailed description of the method, simulation and experimental results demonstrate the high quality of achievable results.

Index Terms—Cascaded multilevel inverters, Chebyshev polynomials, High-power converters, Modulation, Selective Harmonic Elimination (SHE), Total Harmonic Distortion (THD), Waring formulas

Cite: Shaik Mastanbi and Praveen Kumar, "ANALYTICAL METHOD FOR PATTERN GENERATION IN NINE-LEVEL CASCADED H-BRIDGE INVERTER USING SELECTIVE HARMONIC ELIMINATION," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 5, No. 2, pp. 33-46, April 2016.