Multilevel multiphase space vector PWM algorithm with switching state redundancy applied to three-phase converters

This paper presents the particularization of a recent multilevel multiphase space vector pulse-width modulation algorithm for three-phase converters. This modulation technique takes advantage of the switching state redundancy, which permits to achieve different goals like extending the modulation index range and reducing the number of switchings. The particularized algorithm is then compared with an existing multilevel space vector modulation technique showing many similarities. Finally, the algorithm is implemented in a low cost FPGA and it is tested in laboratory with a real prototype by using a neutral point clamped inverter.