A PROCESS AND AN APPARATUS FOR CONTROLLING AN ELECTRIC MOTOR

A process for controlling an electric motor (2) includes providing a functional relationship, which associates a first and a second quantity (T, Vdc), indicative of a torque delivered by the electric motor (2) and of the supply voltage respectively, with a speed parameter (ωlim) of the electric motor (2), determining a pair of values of the first and of the second quantity (T, Vdc), determining (101) a value of a third quantity (ω) indicative of an output speed of the electric motor (2), determining (102) a value of the speed parameter (ωlim) corresponding to the pair of values determined through the functional relationship, determining (103) a value of a fourth quantity (Δω) indicative of a difference between the value of the speed parameter (ωlim) and the value of the third quantity (ω), determining (104) a target value (Ttgt) for the first quantity (T) as a function of the value of the fourth quantity (Δω), and controlling the electric motor (2) according to the determined target value (Ttgt).