Abstract— This study provides a T-type multilevel inverter-matrix converter topology that minimizes hardware complexity while providing additional levels of output voltages for three-phase converters. The T-type multilevel inverter (TMLI) configuration utilizes three asymmetric T-type multilevel inverters and a 3×3 matrix converter (3TMLIMC) for voltage sharing and additional output levels without increasing the count of active power components. A VSA is proposed to manage the switching states to guarantee proper voltage converter function. Two cases are examined: a configuration with three three-level TMLIs (3L-TMLI) for a seven-level (7L) converter and a configuration with three five-level TMLIs (5L-TMLI) for a thirteen-level (13L) converter. The proposed architecture and control strategy are verified through theoretical analysis and MATLAB/Simulink simulations. The design is confirmed to be feasible through an evaluation of its performance. A component count (CC) analysis of the proposed architecture and conventional multilevel inverter topologies demonstrates the proposed architecture’s reduced component count and overall improved efficiency. Therefore, the proposed 3TMLIMC topology stands out as very promising for innovative applications in medium to high-power electronics.
Keywords: Matrix converter; T-type multilevel inverter (TMLI); DC-AC converter; Multilevel voltage generation; Voltage selection algorithm (VSA); Total harmonic distortion (THD); Component count (CC); MATLAB/Simulink
DOI: https://doi.org/10.5455/jjee.204-1764342625

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