Vectorial torque control: A novel approach to torque and flux control of induction motor drives

A general approach to torque and flux control of an induction motor fed by a voltage-source inverter is described in this paper. It is independent of whether rotor or stator flux is controlled, Based on this, an algorithm can be set up which allows the generation of the inverter switching patterns a s a function of the reference values, both of the electromagnetic torque an d of the controlled flux. Experimental comparisons with traditional direct torque control and field-oriented control techniques confirm the possibilit y of achieving very high dynamic performance with the proposed strategy.