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In high-power applications, current-source rectifiers are still popular due to their simple topology, robustness and nearly sinusoidal grid current. They can be also operated with unity or variable power factor. In this way, the rectifier can serve as a power factor compensator. Beside this, they directly control load current which makes them sufficient for direct supply of DC motor. However, the...
A new space vector modulation method for common-mode voltage reduction in four-level nested neutral point clamped (NNPC) inverter is proposed in this paper. The proposed method employs switching states with minimal absolute common-mode voltages to synthesize given reference vectors. A variety of virtual vectors are constructed to facilitate the synthesis. The effect of dead time on common-mode voltage...
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