A novel parameter identification of vector controlled induction motor using a phase lag current control

This paper presents a novel identification of stator and rotor resistances for the vector controlled induction motor system. A current controller that has a phase lag element instead of conventional PI controller is used for the parameter identification without losing current control property. Both stator and rotor resistances are tuned by driving the errors between the references of d- and q-axis currents and their actual values to zero. Therefore, the proposed system is simpler than the conventional MRAS based parameter identification. In the motoring and regenerating modes, the system stability is guaranteed by computing the trajectories of poles from a linear model. The effectiveness of proposed system is verified by digital simulation and experimentation. The improved steady-state torque characteristics are demonstrated.