Alero L4-144 2.4L DOHC VIN T SFI (2000)
Alternator: Description and Operation
GENERATOR
The CS130D generator is non-repairable. They are electrically similar to earlier models. The generator features the following major components:
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The delta stator
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The rectifier bridge
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The rotor with slip rings and brushes
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A conventional pulley
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Dual internal fans
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A voltage regulator
The pulley and the fan cool the slip ring and the frame.
The AD stands for Air-cooled Dual internal fan; the 2 is an electrical design designator; the 30 denotes the outside diameter of the stator laminations
in millimeters, over 100 millimeters. The generator (K60) is rated at 100 amperes, the (K68) is rated at 105 amperes. The generator features
permanently lubricated bearings. Service should only include the tightening of mounting components. Otherwise, the generator is replaced as a
complete unit.
REGULATOR
The voltage regulator controls the field current of the rotor in order to limit system voltage. The regulator switches the current on and off at a rate of
400 cycles per second in order to perform the following functions:
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Radio noise control
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Obtain the correct average current needed for proper system voltage control
At high speeds, the on-time may be 10 percent with the off-time at 90 percent. At low speeds, the on-time may be 90 percent and the off-time 10
percent.
