Alternator

• 1, Casing
• 2, Rectifier cooler
• 3, Power diode
• 4, Exciter diode
• 5, Regulator
• 6, Stator
• 7, Rotor
• 8, Fan
• 9, Pulley
• 10, Support

The alternator should provide a sufficient current for the on-board network, at all operating speeds, for the battery to remained charged. The alternator produces an alternating current which is converted into a direct current by a special rectifier.

The alternator shaft (rotor) is turned by the crankshaft by means of a belt. When supplied with an excitation current, the rotor sets up a magnetic field that induces an alternating current in the fixed coil (stator). A diode rectifier bridge, at the

back of the alternator, transforms the alternating current into a direct current which is sent to recharge the battery. A voltage regulator maintains the current supply at a constant voltage of 14 V for all engine load and speed conditions.

A small radial fan, fixed to the pulley, cools the alternator.