The principle of vector control of electrical drives is based on the control of
both the magnitude and the phase of each phase current and voltage. For
as long as this type of control considers the three phase system as three
independent systems the control will remain analog and thus present
several drawbacks. Since high computational power silicon devices, such as
the TMS320F240 from TI, came to market it has been possible to realize far
more precise digital vector control algorithms. The most common of these
accurate vector controls is presented in this document: the Field Orientated
Control, a digital implementation which demonstrates the capability of
performing direct torque control, of handling system limitations and of
achieving higher power conversion efficiency.