Abstract
ABSTRACT An adaptive predictive current controller (APCC) for a direct field-oriented controlled (DFOC) three-phase asynchronous motor (AM) drive is implemented in this paper. Firstly, DFOC is implemented with conventional hysteresis current controller (HCC) and performance of HCC is being compared to that of the APCC. Stator current of induction motor (IM) is controlled using APCC according to the reference stator current produced by DFOC. An objective function defined in APCC is utilized to reduce the stator current error. The switching vector, which yields the least value of the objective function is opted and applied to the VSI. This controller does not need any linear regulators and modulation stage. Moreover, a stator resistance observer is also implemented to adapt to the change in the stator resistance. The dynamic performance of the machine under load torque, speed variations, and speed reversal are compared and analysed in MATLAB/Simulink and laboratory. The validation simulation results are made experimental results with dS1104. The fast dynamics response with respect to speed and torque, effective decoupling of flux and torque, robust operation of drive, and fast speed tracking are the benefits of the proposed APCC over classical HCC.
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