Eliminating Common-Mode Voltage Spikes in Three-Phase Inverters Through 12-Section Space-Vector Modulation

In three-phase inverters, some modulation methods are used to reduce the high output common-mode voltage (CMV), which will bring many negative effects. However, the inverter with some reduced CMV (RCMV) methods may still have high spikes in some cases. This article proposes a new space-vector modulation (SVM), which is named 12-section SVM (12SSVM). The 12SSVM redivides the vector space into 12 sections to avoid the simultaneous switching of two legs in the areas of cross-section. This method can be used to eliminate the CMV spikes and be applicable in most modulation index ranges. The 12SSVM has a lower total harmonic distortion than other RCMV SVMs. The feasibility and effectiveness of the 12SSVM are verified by the simulations and experiments in a three-phase inverter.