Alternator: Description and Operation

GENERATOR

The charging system has several models available, including the 0114D (ValeoMando) or the CS-121D (Delphi). The number denotes the outer diameter, in millimeters of the stator lamination.

CS generators are equipped with internal regulators. The Y connection (ValeoMando) or Delta (Delphi) stator, a rectifier bridge, and a rotor with slip rings and brushes are electrically similar to earlier generators. A conventional pulley and fan are used. There is no test hole.

Unlike three-wire generators, the 0114D (ValeoMando) or CS-121D (Delphi) may be used with only two connections; battery positive and an L terminal to the charge indicator lamp. Use of the "P", "I", and "S" terminals is optional. The "P" terminal is connected to the stator and may be connected externally to a tachometer or other device.

As with other charging systems, the charge indicator lamp lights when the ignition switch is turned to ON, and goes out when the engine is running. If the charge indicator is on with the engine running, a charging system defect is indicated. This indicator light will glow at full brilliance for several kinds of defects, as well as when the system voltage is too low.

The regulator voltage setting varies with temperature and limits the system voltage by controlling the rotor field current. The mono regulator having 2-3 pins in the terminal can be applied for generator. The regulator maintains the system voltage by controlling field current on-off without typically fixed frequency.