Space vector alpha-beta sliding mode current controllers for three-phase multilevel inverters

Robust sliding mode on-line space vector controllers, designed for output current control in multilevel three-phase power inverters are described. Capacitor voltage divider equalisation is included using the same approach. Using two four-level comparators, simulation and experimental results show no steady state-errors, very fast dynamics and robustness against power supply variations and load unbalances.

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