TAG 0045568 - Caterpillar

Illustration 1 g03237336
Alternator Components (1) Fan (2) Front frame assembly (3) Stator (4) Rotor (5) Rectifier (6) Slip ring (7) Brushes (8) Regulator (9) Rear frame assemblyThe major components of the alternator are stator (3), rotor (4), rectifier (5), regulator assembly (8), brushes (7) and a capacitor (if equipped).
Illustration 2 g03237356
Stator (3) StatorStator (3) consists of a stator core and coils. As the rotor (4) turns, the varying magnetic field causes the stator coil to produce three phase alternating current (AC).
Illustration 3 g03237357
Rotor (4) RotorRotor (4) consists of a core, coils, and slip ring (6). The rotor (4) provides the magnetic field between the rotor field winding and the stator (3). Slip ring (6) provides the surfaces for brush contact.
Illustration 4 g03237359
Brushes (7) BrushesThere are two brushes (7) that contacts the two rotating slip rings (6) on the rotor (4). Current flows to the rotor coil through the brushes and slip rings. There is one positive (+) and one negative (-) brush. The brush material is copper graphite.
Illustration 5 g03237360
Rectifier (5) Rectifier (10) Positive (+) diodes (11) Negative (-) diodesRectifier (5) contains three positive (+) diodes (10) and three negative (-) diodes (11) that forms the full wave rectifier which is connected to the stator. Rectifier (5) changes or rectifies three phase AC to DC. The rectifier also provides excitation current through three exciter diodes (not shown).
Illustration 6 g03237376
Regulator (8) RegulatorRegulator (8) controls alternator output. The regulator is mounted on the alternator rear frame assembly (9).
Illustration 7 g03237377
Capacitor (12) CapacitorCapacitor (12) smooths alternator DC voltage. The capacitor is mounted on the back of the alternator.