Adaptive observers for self commissioning of induction motor drives: Theory and experiment

A new identification procedure to identify unknown parameters of induction motors for self-commissioning of vector controlled electrical drives is developed, substantiated and experimentally verified. Our algorithm uses a full-order adaptive observer to estimate stator fluxes and currents and motor parameters: rotor resistance, stator (rotor) inductances, and, magnetizing inductance. Two observers are designed under condition that stator resistance is obtained during preliminary test applying Ohm law. Experiments demonstrate that the adaptive observer provides accuracy of identified parameters and fast asymptotic convergence of estimation errors to zero. The proposed solution is of a particular importance in high-performance electromechanical systems with speed measurements as well as sensorless vector controls.