Patent ID: 7221117

Claim:
A method for controlling an electric motor (M) having a three phase supply, configured to be used in a speed variator configured to function according to a control law in which flux and current references (x ref ) are used for calculating a reference voltage (u ref ) to be applied to the motor (M), the method comprising: determining a correction value (x c ) for the flux and current references (x ref ) when the calculated reference voltage (u ref ) has a value greater than a limit value(u lim ); applying the correction value (x c ) to the flux and current references (x ref ); and calculating the correction value (x c ) of the flux and current references (x ref ) utilizing a dynamic system (MM) representing a model of the motor (M) to be controlled, provided with at least one integrator (Int), and having as input the difference between a limited value of a control voltage (u) to be applied to the motor (M) and the calculated reference voltage (u ref ).