According to Lenz’s law, the induced currents oppose the variations of the original field and for these reasons, the induced currents that circulate in the conductors form a magnetic field of opposition to the rotating field. The difference between the magnetic field velocities of the rotor and that of the field of the stator that drives the rotor and this difference is called the slip. When the engine 3/4hp 56c motor load is increased, the electric motor tends to slow down and increase slippage. Thus, the induced current increases in the bars of the squirrel cage and the motor torque.

In this way, the motor torque is indicated by the difference between the speed of the rotating field and that of the rotor. As the rotor is suspended by bearings in the center of the stator, it will rotate along with the rotating field and will tend to accompany it with the same speed, but this does not happen because the rotor remains at a slower speed than that of the rotating field. If the rotor reaches the speed of the magnetic field of the stator, there would be no induced voltage on it, which would cause it to stop.