A Dual DC Link Novel Nine-Level Inverter (N9LI) With Reduced Components and On-State Switches Un nouvel onduleur à neuf niveaux à double liaison CC (N9LI) Avec des composants réduits et des commutateurs d’état

This article provides a novel nine-level inverter (N9LI) configuration with fewer components. The new multilevel inverter (MLI) generates nine levels with eight switches including two bidirectional switches and two asymmetric dc links. The trinary geometric dc links are used in the N9LI. In contrast to other sequences, it offers the maximum level of voltage output with the minimum dc links and switches. Furthermore, this configuration also provides a negative level without the utilization of additional circuitry including an H-bridge, so that switches experience less voltage stress. Compared to conventional H-bridge configuration, for each mode of operation, a maximum of three switches conduct with fewer switching transitions, providing reduced switching and conduction losses and better efficiency. The proposed structure’s cascade connections result in a reconfigurable configuration with more levels and higher voltages. In terms of switching devices, drivers, and dc voltage sources, comparison findings are provided with other recently reported designs in the literature. The suggested N9LI design uses fewer switches, driver circuits, and dc links than existing configurations. A multicarrier pulsewidth modulation approach is used to provide the switching pulses. The configuration was exhaustively simulated using MATLAB/SIMULINK, and its viability was proven experimentally for a nine-level inverter (9LI).