Analysis and control of the 3- and 5-phase voltage source inverters using the averaged output voltage method

A systematic analysis for the multi-phase voltage source inverter (VSI) is illustrated in this paper. By applying the singular value decomposition, the instantaneous output voltage of VSI can be categorized into two complementary groups with the same magnitude and different sign to each other. The switching strategy for minimum conduction time which yields the maximum linear modulation index is proposed. The comparison of SVPWM and the proposed method for 3-phase VSI are shown to be equivalent but the implementation of thus algorithm that needs only comparators and adders is simpler.