In an electric vehicle, the battery acts as an energy reservoir. The motor allows the use of this electrical energy for propulsion of the vehicle.
The electric grid supplies alternating current; the battery stores that energy that returns in the form of direct current; the motor runs on alternating current power but with different frequency and voltage from that of the network. The components of the engine are partly responsible for these changes: they manage the flows and control the various stages of the process.
In the first step, from the wall socket to the battery, the alternating current must be converted to direct current load required by the battery.
The second step, from the battery to the engine, is to convert again the current into alternating current to power the stator.
Once on the road, the electric vehicle moves without jolts and without noise. It provides linear accelerations, never wedge and has no clutch. Reversing is possible by simply rotating the rotor in reverse.
One final tip: the electric engine uses energy, but can also recover it! If the driver’s foot is off the accelerator the engine should generate and recharge the battery –the so called energy recovery by deceleration.