Abstract：Power response delay and dc-bus voltage fluctuations are analyzed, and then a novel integrated control scheme for three-level NPC based dual-PWM converter is proposed. The direct power control with space vector modulation(DPC_SVM)for front-end rectifier and indirect rotor field oriented control(IFOC)for back-end inverter-fed induction motor are adopted respectively. A power feed-forward control loop from inverter to rectifier side is introduced to obtain better dynamic performance for DC link. Experimental results show that the system exhibits excellent dynamic performance, which can minimize dc bus voltage fluctuations with low size of capacitors.
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2011, Vol. 26 
