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A Single-Phase 5-Level Inverter Topology with Reduced Semiconductor Switches
V. Janaki Ramaiah,
Published in Institute of Electrical and Electronics Engineers Inc.
2018
Abstract
For any switching frequency, multilevel inverters produce better harmonic profile compared to basic 2-level inverters. Among the available multilevel inverters topologies in the literature, some of the topologies like neutral point clamped (NPC) or diode clamped, flying capacitor (FC) or capacitor clamped, and H-bridge are conventionally used. However, the NPC and FC type inverter topologies comprises the capacitor voltage balancing issue, and the H-bridge requires more number of isolated DC voltage sources and semiconductor switches. To overcome the issues encountered with the conventional topologies, a new single-phase 5-level inverter topology by excluding the capacitor components and with a reduced number of semiconductor switches is proposed in this paper. A reduced number of levels is also achieved with the proposed topology under certain fault conditions. © 2018 IEEE.