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One-Step Modulation Predictive Current Control Method for the Asymmetrical Dual Three-Phase Induction Machine

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5 Author(s)
Federico Barrero ; Electron. Eng. Dept., Univ. of Seville, Seville ; Manuel R. Arahal ; RaÚl Gregor ; Sergio Toral
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Multiphase (more than three phases) drives exhibit interesting advantages over conventional three-phase drives. Over the last years, topics related to the extension of control schemes to these specific drives have been covered in depth in the literature. Direct torque control and predictive current control are normally used in conventional AC drives when fast electrical dynamic performance is required. In this paper, a one-step modulation predictive current control technique is proposed for asymmetrical dual three-phase AC drives. Based on the use of a predictive model including the motor and the inverter, the control algorithm determines the switching state which minimizes errors between predicted and reference state variables. The period of application of the selected switching state is then obtained, resulting in a submodulation method. The proposed predictive current control algorithm uses a prediction horizon of one sampling period; however, two switching states are applied during the sampling period. The switching states are the selected optimum active vector and a null voltage combination. Simulation and experimental results are provided to examine the features of the control method. Performances, advantages, and limitations are also discussed.

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IEEE Transactions on Industrial Electronics  (Volume:56 ,  Issue: 6 )