Vector control of induction motor by a spiral vector theory

In this paper the authors propose a vector control of induction machine by the spiral vector theory. This method permits to establish the performance equations of the induction machine in function only one phase variables of the stator and rotor. The equations obtained are basically used in the field oriented control. The simulation results give a good decoupling between the air gap flux and electromagnetic torque and it is sufficient to track one voltage (or current) quantity to make the regulation in the case of direct vector control of induction machines.