Carrier-based methods have been used widely for the switching of multilevel inverters due to their simplicity, flexibility and reduced computational requirements compared to Space Vector Modulation (SVM). Several multi-carrier modulation methods with miscellaneous properties have been already known. The paper proposes three novel multi-carrier techniques being more efficient for high-power inverter applications. While evaluating and comparing these new with all classical methods through measures like THD,WTHD, WTHD0, switching losses and DC bus utilization, the paper shows their advantges for applications of Diode-clamped and Cascade multi-level topologies by simulation results. The validity of obtained results is approved by experimental results.
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