Induction motor control using torque and rotor flux oriented presentation

An approach resembling the Direct Torque and Flux Control is presented in the paper. To achieve this, the motor is first presented with the applied torque, rotor speed, rotor flux, and its derivative as states of the system. Then, using this presentation, a control algorithm is developed and evaluated. The main contribution of the work is the direct connection of the torque and flux with the applied stator voltage, which was established with the calculation of the torque and rotor flux derivatives dependant solely on the torque, rotor flux and speed. The difference between the presented method and the classical DTC algorithms is the use of the PWM voltages instead of basic voltage vectors, which results in the reduced torque and flux ripple. The performance is investigated and verified with simulations and experiments.