This method uses the stator current
in the feedforward control loop to estimate the rotor flux.
The adverse phenomena which is caused due to the
parameter variations ofthe I.M. in this work is cured by the
proposed control technique .This technique includes the new
error system with nominal reference values which are the
rotor angular velocity and the optimal two - components of
the rotor flux linkage current. The preview feedforward steps
of the desired reference values are introduced in the control
law to improve the transient response,