ABSTRACT
Induction Motor (IM) drives may be classified into two main control strategies. Scalar control, of the IM voltage magnitude and frequency, is one of ac drives which produces good steady-state performance but poor dynamic response. There is an inherent coupling effect using the scalar control because both torque and flux are the functions of voltage or current and frequency. This results in sluggish response and is prone to instability because of 5th order harmonics. However, vector control (VC) decouples these effects.
