Gruppo 1: An electrical generator transforms mechanical energy into electrical energy., Gruppo 2:  The generator uses the same basic equipment as the electric motor: an armature, a coil, a permanent magnet and a commutator., Gruppo 3: In this arrangement the electromagnetic induction principle works in an opposite way: the mechanical rotation of the drive shaft makes the armature rotate between the poles of the permanent magnet;, as the magnetic field varies due to the rotation of the coil, an electric current is induced within it., Gruppo 4: The rotational movement of the armature would naturally produce alternating current in the form of a sine wave., Gruppo 5:  However, the introduction of a commutator which reverses the connection every half-turn provides a pulsed positive output., Gruppo 6: With additional smoothing circuitry, the pulsed output can provide a steady DC voltage (for use with battery chargers, etc.), whereas AC generators are used to power the electric grid.,

The generator

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