Charging And Cranking Systems Flashcards
How would you test alternator regulated voltage with the alternator on the vehicle?
Engine at fast idle with less than 10 amp electrical load
How do you test a rotor for opens?
Measure continuity from one slip ring to the other
What do you check first when a unit has a charging stsem problem?
Alternator belt tension
What do you do if o.c.v. is above 12.6V on a 12V system?
Remove the surface charge from the battery
Whatbis the result of a charging system with a high voltage drop within the circuit?
The charging voltage at the battery will be low
Where is the field coil in an alternator
Wound in the rotor
What is inductive reactance?
Counter electromotive force that limits the current output of an alternator
Whatbis the purpose of an alternator capacitor
To absorb voltage spikes
A delta wound stator will produce:
High current at low speed
What component in an alternator changes the stators output output into usable current for a vehicle?
The rectifier bridge
The “A” regulator circuit controls the field current:
After the field coil
Diodes are electrical devices that:
Allow current flow in only one direction
The wye wound stator will produce:
High voltage at low speed
What are two major Circuits of an alternator?
Field and output
How are eddy currents controlled in an alternator?
The stator core is constructed from laminated plates
In a brushless alternator:
The rotor turns around a stationary field coil
An alternator produces what kind of current
Alternating current
What is the maximum charging voltage in a 12 V charging system?
14.8V
What is the minimum number of diodes used by a vehicle alternator to rectify all of the output current?
Six
A regulator controls :
Alternator voltage output (its a voltage regulator)
What is the purpose of slip rings?
Supply field current to the rotor
How can the maximum current of an alternator be changed?
Change the number of stator windings
When does an alternator produce the greatest induced current?
When the magnetic field is at right angles to the stator winding
The alternator component that carries the magnetic field is:
The rotor
