Generator And Regulator

The generator comprises the following major components:

• Stator
• Rotor
• Rectifier pack
• Regulator.

The stator consists of a flat core pack into which the stator wires are pressed.

The rotor comprises a field winding, wound around an iron core and mounted on a shaft. The rotor is housed within the stator and mounted on bearings to provide smooth running and support, due to the side loading applied by the drive belt tension.

The rectifier contains 6 pairs of diodes (six on the positive plate and six on the negative plate) mounted on a heat sink. The heat sink dissipates the resultant heat created in the electrical conversion process. The rectifier converts the AC produced in the stator coils into DC that is required by the vehicle electrical system.

The regulator provides a controlled variable voltage output from the generator. Two electrical terminals are provided on the outer casing of the generator. B+ terminal supplies the rectified and regulated DC from the generator via a large diameter cable to the battery positive terminal. The second terminal provides the Local Interconnect Network (LIN) bus connection between the regulator and the Body Control Module/Gateway Module (BCM/GWM) assembly.

The generator pulley incorporates a one-way clutch that reduces Noise, Vibration and Harshness (NVH), and improves the life of the Accessory drive belt. The one-way clutch allows the belt to drive the pulley without slip occurring, but prevents the generator from driving the belt during transients in engine speed ('belt whip') due to the high rotational inertia of the generator internal components.