• H.Vijayalaxmi
• S.Papa Rao

Dc-based distributions and dc-based micro grids are recognized as the promising solutions for future smart-grid systems due to their clear advantages of flexibility for photovoltaic and fuel cells interface, without frequency stability, high conversion efficiency, and easy system control. The Modular Multilevel Converter (MMC) represents an emerging topology with a scalable technology making high voltage and power capability possible. The MMC is built up by identical, but individually controllable sub modules. A control scheme with a new sub module capacitor voltage balancing method is also proposed in this paper. Modular multilevel converters, based on cascading of half bridge converter cells, can combine low switching frequency with low harmonic interference. They can be designed for high operating voltages without direct series connection of semiconductor element. The high switch voltage stress in the primary side is effectively reduced by the full bridge modules in series. In this paper by investigating by investigating the topology derivation principle of the phase-shift-controlled three-level dc/dc converters, the modular multilevel dc/dc converters, by integrating the full bridge converters and three-level flying capacitor circuit, the proposed concept is implemented to control of DC motor using modular dc-dc converter with MATLAB/SIMULINK software.

Input Voltage Auto Balance, Modular Multilevel DC/DC Converter, Phase-Shift Control Scheme, Zero-Voltage Switching (ZVS).DC Motor

"Phase-Shift Control for High-Voltage DC-Based System with Modular Multi-Level DC/DC Converter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.3, Issue 10, page no.81-89, October-2016, Available :http://www.jetir.org/papers/JETIR1610009.pdf

"Phase-Shift Control for High-Voltage DC-Based System with Modular Multi-Level DC/DC Converter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.3, Issue 10, page no. pp81-89, October-2016, Available at : http://www.jetir.org/papers/JETIR1610009.pdf