Stator resistance voltage-drop compensation for open-loop AC drives

The paper presents two simple stator resistance voltage-drop compensation methods that maintain the stator flux linkage constant in the steady state and achieve approximately constant flux linkage during transient conditions. These methods are based on an induction motor model in a rotating reference frame. A mathematical analysis of the two possible alternatives is shown, indicating the stability limits for each. Practical results are then compared with the traditional volts/hertz (V/f) configuration and the stability limits verified