Stator parameters influence on the field-oriented control tuning

High performance drives can be achieved by applying indirect field oriented control to induction motors. To perform the field orientation and to obtain a fast and accurate torque control, a suitable model of the motor must be employed. A parametric model with only four electrical parameters is presented. This model is optimal for motor identification and controller implementation. Only two parameters of the model (the rotor parameters) are involved in the indirect field-oriented control when the motor is fed by a current regulated inverter. Several schemes can be employed to estimate these parameters; an extended Kalman filter is proposed because of its advantages and performance. However, the Kalman filter, like most motor identification schemes uses stator voltage and current measurements and relies on the stator parameters values, so errors in the stator parameters can alter the rotor parameter estimations. The stator parameters influence (during the estimation of the rotor parameters) is analyzed for steady-state and transient operating conditions