Patent ID: 7202629

Claim:
Method for adjusting motor parameters in a variable speed drive intended to control an electric induction motor (M), wherein the method comprises: a step for determining a first difference (ΔI Q ) between a motor torque current reference (I Qref ) and a motor torque current measurement (I Qm ), and a second difference (ΔI D ) between a motor flux current reference (I Dref ) and a motor flux current measurement (I Dm ), a step for calculating a correction value (ΔR R ) of the motor's rotor resistance and a correction value (ΔL R ) of the motor's rotor inductance from the integral term of said first difference (ΔI Q ) and from the integral term of said second difference (ΔI D ), a step for adjusting values of parameters of the motor model based on said correction values (ΔL R , ΔR R ) of the rotor inductance and the rotor resistance, a step for generating control voltages (U D , U Q ) to be applied to the motor (M), using said adjusted motor parameter values.