One of the core concepts of vector control is to replace the three-phase sinusoidal quantities with two DC
quantities so that the control strategies effectively used on DC machine could now be applied to induction
machines. To achieve this aim, a series of coordinate transformations, flux estimation, decoupling and regulating
will be done. The procedure of vector control design is introduced in detail in this chapter. Firstly,
an overview of vector control design is exhibited as