Effective space-vector modulation algorithm for multilevel converters

This paper presents an effective modulation algorithm for voltage source multilevel converters. This method permits the on-line computation of the switching sequence and the on-state durations of the respective switching state vectors corresponding to the modulation of multilevel inverter drastically reducing the computational load. Therefore a stored information from a memory or a table is not necessary in this algorithm. This modulation technique permits an economic and simply electronic implementation. The simulation results show an excellent performance of the proposed modulation technique. It has been developed to be programmed in very low-cost microcontrollers and it could be implemented as a hardware module inside the microcontroller in order to increase its efficiency and performance.