On-line estimation of the stator resistance of induction machinesbased on zero-sequence model

摘要

This paper proposes a technique to estimate the stator resistancenof induction machines. The stator resistance is obtained by solving anleast squares minimization problem, a solution which also provides thenvalue of the leakage inductance. The technique exploits the machinenbehavior with respect to zero-sequence quantities. It is conceived to benused online with the drive strategy without disturbing the angular shaftnspeed. Experimental results are used to demonstrate the feasibility ofnthe proposed technique