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For a cascaded neutral-point-clamped (NPC) inverter applied to the medium-voltage high-power induction-motor (IM) drives, an effective control technique is proposed in this paper. The novel sinusoidal pulsewidth modulation (PWM) pulse-rotation-control approach, for a wide range of output voltage, provides a simple way to implement vector control for IM when the cascaded NPC inverter is employed. The...
An effective control solution for speed sensorless vector control of induction motor fed by a cascaded neutral point clamped (NPC) inverter is proposed, where the novel SPWM pulse rotation control approach provides a simple way to implement vector control for induction motor when the cascaded NPC inverter is employed. The single carrier is used in the novel pulse control, instead of the multi-carriers,...
A 1 MW/6000 V cascaded neutral point clamped (NPC) inverter is developed for medium voltage high power induction motor drives and an effective control technique is proposed in this paper. A pulse rotation method of SPWM is implemented for a wide range of output voltage. The output voltage and power, and series-capacitor DC voltage of each module are perfectly balanced with switching at a low frequency...
Cascaded neutral point clamped (NPC) inverter is more suitable for high voltage, high power applications, but the power and voltage balances are crucial in practical uses. This paper proposes an effective SPWM control scheme for a cascaded NPC inverter in which a pulse rotation is fulfilled for all modulation indices. The module voltage and power, and series- capacitor voltage of each module are perfectly...
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