Sequential Predictive Duty Cycle Control for Induction Motor

In the field of model predictive torque control, the problem of weighting factor processing has always attracted attention. Sequential model predictive control which uses two sequential cost functions to select voltage vector shows many advantages in eliminating weighting factor and improving development efficiency. However, its artificially prescribed order of cost functions and the number of selected voltage vectors greatly affect control performance. While keeping the advantages of no weighting factor tuning, this paper proposes a sequential predictive duty cycle control (SPDCC) solution for induction motor drive. The sequential cost function with additional variable parameter is designed to balance better the weighting relationship between electromagnetic torque and stator flux. To improve the effect of the single voltage vector, the duty cycle control based on torque deadbeat is applied in a symmetric manner. The simulation results show the effectiveness of the proposed method.