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A new seven-level inverter topology for IM drive is proposed in this paper. This topology consists of two three-phase two-level inverters fed by isolated DC voltage sources and six H-bridges fed by capacitors. An important advantage of this topology is the reduction in DC link voltage magnitude by half when compared with the requirement of DC link voltage in conventional NPC or flying capacitor topologies...
This paper proposes a new five-level inverter topology for open-end winding induction motor (IM) drive. The popular existing circuit configurations for five-level inverter include the NPC inverter and flying capacitor topologies. Compared to the NPC inverter, the proposed topology eliminates eighteen clamping diodes having different voltage ratings in the present circuit. Moreover it requires only...
A dc link capacitor voltage balancing scheme along with common mode voltage elimination is proposed for an induction motor drive, with open-end winding structure. The motor is fed from both the ends with three-level inverters generating a five level output voltage space phasor structure. If switching combinations, with zero common mode voltage in the pole voltage, are used, then the resultant voltage...
A DC link capacitor voltage balancing scheme for an three-level inverter with open end winding induction motor drive is proposed in this paper. The multiplicity of the switching combinations of the inverter voltage locations is best exploited to arrive at the capacitor balancing criterion. All the inverter vector locations, which has unbalancing effect on the capacitor voltages, exhibits greater multiplicity...
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