A RMRAC parameter identification algorithm for induction motors

This paper presents a discrete time algorithm able to identify all electrical parameters of three phase induction motors. This technique can be also applied to identification of other machines such as permanent magnet synchronous motor (PMSM), single-phase induction motors (SPIM), and others systems, that will be described opportunely. The identification algorithm is based on robust model reference adaptive controller (RMRAC) applied to electric machine model. The identification uses only measurements of stator currents with standstill rotor. From the correct parameters it is possible to design high performance controllers and sensorless drives for the induction motor. Furthermore, the correct parameters of induction motor allow a better representation of dynamic simulation behavior of machine. Experimental results are presented to provide the effectiveness of the method.