Abstract
Recently introduced topologies achieve higher number of output voltage with less number of semiconductor devices, dc sources. Reduction of switch count and DC voltage sources reduces the size, cost, complexity and enhances overall performance. Enhanced topology is capable of producing 7, 9 and 11 levels of output voltage with seven switches only. Moreover, significant reduction in voltage stress across the switches can be achieved. A comparative analysis of enhanced topology with the conventional topology and recently published topologies has been made in terms of controlled switches, power diodes, driver circuit requirement, DC voltage sources and blocking voltage. Multi-carrier pulse-width modulation strategy is adopted for generating the switching pulses. Simulation study of the enhanced topology has been carried out using Matlab/Simulink.
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