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Multicarrier PWM Based Cascaded H-Bridge Seven Level Inverter
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A Cascaded H-Bridge Multilevel Inverter is a power electronic converter built to synthesize a desired ac voltage from several levels of dc voltages with better harmonic spectrum. This paper analyzes the performance of a cascaded H-Bridge seven level inverter topology employing multicarrier pulse width modulation technique which magnifies the fundamental output voltage with reduction in total harmonic distortion to 24.64% when compared to the five level inverter. The inverter is capable of producing seven levels of output-voltage levels from the dc supply voltage. It can also be easily extended to any number of phases or levels. The performance has been studied by the MATLAB/Simulink. The output shows better performance results.
Keywords
Multilevel Inverter, Cascaded H-Bridge Multilevel Inverter, Multicarrier Pulse Width Modulation, Total Harmonic Distortion.
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