Abstract
AbstractModel predictive current control (MPCC) is widely concerned because of its simple principle and multivariable constraint control. The traditional MPCC adopts rotor flux orientation, and its performance is easily affected by the rotor side parameters which are hard to observe. In this paper, the MPCC based on stator flux orientation is researched. Firstly, the discrete models of induction motor and the MPCC system based on stator field orientation are established. Then, the principle of MPCC and its control system topology are analyzed, the current decoupler, stator flux observer and cost function are constructed respectively. The simulation results show that the MPCC based on stator flux orientation has good steady-state and dynamic performance, the output electromagnetic torque can respond quickly, and the electromagnetic torque and stator flux are fully decoupled. At the same time, the switching frequency of the three-phase inverter is reduced by introducing switching frequency constraint into the cost function.KeywordsInduction motorModel predictive current controlStator flux orientation
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