Application of an `electronic stator resistance´ in VSI fed field oriented synchronous machines

The authors describe the concept of the so called `electronic stator resistance´ and its applications. In the field orientation control circuit of a voltage source inverter (VSI) fed synchronous machine (SM), the estimated values of the resistance of both the stator and the damper winding are used. Detuning of any resistance value influences the performance of the system. Instead of the parameter identification technique, an `electronic stator resistance´, which in fact functions as a negative current feedback loop, can be used as a countermeasure to the stator resistance detuning. This method is simple, effective and easy to realize. The study also shows that, to ensure the stability, the stator resistance should be tuned according to the cold machine