DESIGN AND IMPLEMENTATION OF HYBRID SPWM CONTROL FOR CASCADED H-BRIDGE MULTI LEVEL INVERTER FOR MOTOR DRIVES

Year 2014, Volume: 14 Issue: 1, 1721 - 1727, 29.09.2014

N. Sujıtha , S. Satish Kumar M. Sasıkumar

Abstract

In this paper, present the performance of hybrid modulation technique for soft switched cascaded five level inverters. The proposed modulation schemes are hybrid alternative phase opposition, hybrid phase shift carrier, hybrid single carrier sinusoidal PWM schemes. It inherits the switching loss reduction along with reduced harmonic performance of cascaded multilevel inverter fed drive system. The inverter topology used here has recently suggested in the area of high power medium voltage applications. The performance of this cascaded inverter has been analysed and compared with the results obtained from theory and simulation. Simulation study of the inverter employing the proposed HAPOD, HPSCPWM, HSCSPWM strategy has been done in MATLAB/SIMULINK. Among these three modulation schemes the efficient strategy is employed in the hardware implementation of hybrid multilevel inverter.

Keywords

Cascaded multilevel inverter, Hybrid alternative phase opposition disposition (HAPOD), Hybrid phase shift carrier (HPSC), Hybrid single carrier sinusoidal PWM (HSCSPWM), switching loss

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• Ms.N.Sujitha has received the Bachelor degree in Elec- trical and Electronics En- gineering from Shri Andal Alagar College of Enginee- ringAnna University, India in 2008 and Master of Engi- neering in Power Electronics and Drives from Jeppiaar Engineering College,
• Anna University, India in 2013. Her area of inter- est are power electronics and inverters.
• Mr. S.Satish Kumar has re- ceived the Bachelor degree in Electrical and Electronics Engineering The Indian En- gineering College, Vada- kkangulam, Kanyakumari Tamilnadu, India in 2000.
• He completed Master of En- gineering in Power Electronics and Drives from Sathyabama University, India in 2007. Currently he is working as a Associate Professor in Jep- piaar Engineering College, Chennai Tamilnadu, India.
• Prof. Dr.M.Sasikumar has