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For the three-level neutral-point-clamped inverters, neutral point voltage balancing control is necessary for proper operation. This paper presents a balancing control strategy of the neutral-point voltage with a closed-loop dc-link mid-point capacitor voltage control. Instead of the adjustable pulse-width switching sequence of the small voltage vector with the space-vector-based concept, it is only...
In this paper, the conventional space vector modulation (SVM) and the unipolar carrier-based space vector pulse width modulation (CB-SVPWM) for three-level neutral-point-clamped (NPC) inverters are analyzed based on the continuous scheme. Essentially, the switching commutations of dual methods are obviously investigated and compared for all the operating of conditions along with their corresponding...
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