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access icon free Reduced switch count pulse width modulated multilevel inverter

The study develops a new topology for a single phase cascaded H-bridge multilevel inverter (CHBMLI) with a focus to reduce the number of power switching devices in the path for the flow of current. The philosophy combines an array of series connected voltage sources on either side of an H-bridge inverter to derive the new configuration for the MLI. It allows a multicarrier pulse width modulation approach to the process of generating the pulses for synthesising the PWM output voltage. The use of a smaller number of switches to reach the output voltage show cases the ability of the modular architecture to expand the scope of the CHBMLI. The architecture of a field programmable gate array fosters to realise its implementation and validate the simulated results over a range of modulation indices. The performance draws a new directive in the choice of a particular topology for the MLI to suit applications in the real world.

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-pel.2015.0720
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