Abstract—Power electronic devices are finding increased applications in the transformation of electrical energy into useful forms, especially at higher power levels. The recent trend in power electronic converters is to switch the power semiconductor devices in power modulators at increased frequencies with a view to minimize harmonics, enhance power quality and regulate the output voltage. This paper is aimed to present the design of high power inverter topology capable of producing a near sinusoidal ac voltage with minimal harmonic distortion which enables its use in high power applications. The analytical expressions for the proposed inverter output voltages using Fourier analysis have been obtained. Vector diagrams are drawn to clearly illustrate the mechanism of harmonic cancellation in the proposed multipulse-multilevel inverter topology. The complete digital simulation of the proposed VSI is performed using MATLAB/Simulink and the simulation results closely agreed with the analytical results.

Index Terms—Multi-pulse inverter, Multi-level inverter, Phase shifting transformer, Total Harmonic Distortion, Voltage source inverter.

B.Geethalakshmi is with the Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Pondicherry, India (e-mail: bgeethalakshmi_pec@yahoo.co.in).
P.Dananjayan is with the Department of Electronics and Communication Engineering, Pondicherry Engineering College, Pondicherry, India. (Corresponding Author – Phone:9443768716; fax:04132655101; email-pdananjayan@rediffmail.com).

Cite: B. Geethalakshmi and P. Dananjayan, "A Combined Multipulse-Multilevel Inverter Suitable For High Power Applications," International Journal of Computer and Electrical Engineering vol. 2, no. 2, pp. 257-261, 2010.