Induction Motor Speed Control Through Vector Control Approach

The technique of vector control, often stated to as Field-Oriented Control (FOC), is frequently utilized in factory made applications to regulate speed and torque of IM drives. Vector control enables precise control of motor speed and torque by segmenting the stator current into components that produce torque and flux. The 3-phase Alternating Current (AC) voltage & current signals are altered into a rotating reference frame, where the stator currents are divided into their torque and flux components, to achieve this. A PI controller uses the converted signals to produce the reference values for the torque $(T_{c})$ & flux components of the stator’s current. The inverse Park transform is then used to turn these values back into three-phase signals, which creates the control signals for the motor drive.