Alternator: Description and Operation
GENERATORThe generator is non-repairable. The generator(s) feature the following major components:
^ The delta stator
^ The rectifier bridge
^ The rotor with slip rings and brushes
^ A conventional pulley
^ Dual internal fans
^ The regulator
The pulley and the fan cool the slip ring and the frame.
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:
^ Radio noise control
^ 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.