Three phase Nine Level Inverter with Minimum Number of Power Electronic Components

This paper presents a new configuration of a three-phase nine-level multilevel voltage-source inverter. This topology constitutes three-phase two-level bridge with three bidirectional switches. A multilevel dc link using fixed dc voltage supply and cascaded half-bridge is connected in such a way that the proposed inverter outputs the required output voltage levels. This topology has the advantage of increasing the number of voltage levels with reduced number of power electronic components. For the purpose of increasing the number of voltage levels with fewer number of power electronic components, the extended structure suggests different methods to determine the magnitudes of utilized dc voltage supplies. The proposed multi-level inverter is designed and implemented in MATLAB/SIMULINK, and required number of voltage levels are obtained.