The electric induction motor has several losses and for that reason is that the main mechanisms that generate heat can be divided into five groups considered key and that has to do with where they occur. The electric motor may Joule losses, hysteresis losses, eddy current losses, the scattered losses and mechanical losses.
Joule losses that reaches the electric motor is related to the conversion of electrical energy into thermal energy hum through electrically conductive. This type of loss in the electric motor is directly related to the electrical resistance of the motor and it changes proportionally to the square of the current. The generation of heat that are the losses in the electric motor by Joule effect occurs in the stator in the copper coil and the rotor cage in its aluminum bars.
The iron losses occur in the electric motor due to the conversion of electric energy into heat energy in the magnetic core of the electric motor rotor and the rotor.