Alternator: Description and Operation

The generator (1) is belt-driven by the engine using a serpentine type accessory drive belt (2). It is serviced only as a complete assembly. If the generator fails for any reason, the entire assembly must be replaced. The only component that is replaceable is the voltage regulator.

As the energized rotor begins to rotate within the generator, the spinning magnetic field induces a current into the windings of the stator coil. Once the generator begins producing sufficient current, it also provides the current needed to energize the rotor.

The Y type stator winding connections deliver the induced AC current to 3 positive and 3 negative diodes for rectification. From the diodes, rectified DC current is delivered to the vehicle electrical system through the generator battery terminal.

Noise emitting from the generator may be caused by: worn, loose or defective bearings; a loose or defective drive pulley; incorrect, worn, damaged or misadjusted drive belt; loose mounting bolts; a misaligned drive pulley or a defective stator or diode.