Alternators And Starter Motor Flashcards
What does an alternator do
Convert mechanical energy into electrical energy
What are the 4 main parts of an alternator
Stator rotor regulator rectifier
How does an alternator circuit work
The pulley turns the alternator’s rotor shaft, which spins a set of magnets inside a coil. These spinning magnets generate alternating current (AC) in the stator, which is then channelled to the alternator’s rectifier which works by using diodes . The rectifier converts that AC energy into DC, lastly the regulator limits the amount of charge which can leave the alternator using transistors controlling the duty cycle
What is a good voltage output for an alternator
13.5 to 14.5 volts
What are the 2 configurations of an alternator rotor
B star and delta
How does a rectifier work
Only allows flow of electrons one way using diodes
How does a regulator work
It uses resistors to limit voltage output
What is the purpose of the iron claws on an alternator
To increase the magnetic field
What is the 2 starter motor types
Pre engaged and inertia
What are the negatives of a inertia starter motor
It is permanently on the starter motor which will make components wear more quickly
What is an advantage of a pre engaged starter motor.
It can retract using a solenoid which engages and disengaged the pinion
How does a pre engages starter motor circuit work
As soon as ignition is switched in the detent the power reversed at the magnetic poles in the solenoid from high to low circuit this causes the pinion to engage and turn the motor
What does the brush pack do
Supply’s current to the commutator
Which allows drive in the component