Operating Scheme of Six-Level Hybrid Inverters with Reduced Capacitor Count

In this paper, a novel structure of three-phase six-level hybrid flying-capacitor (6L-HFC) inverter is proposed. This topology provides the benefit of lower harmonic distortion compared to the predecessor topologies with reduced device count, where the THD of line voltage at unity modulation index is 14.53 %. The effectiveness of this topology, along with the proposed voltage vector control scheme for the split DC-link and flying capacitors, has been verified by simulation results.