Alternators And Starter Motor Flashcards

1
Q

What does an alternator do

A

Convert mechanical energy into electrical energy

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2
Q

What are the 4 main parts of an alternator

A

Stator rotor regulator rectifier

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3
Q

How does an alternator circuit work

A

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

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4
Q

What is a good voltage output for an alternator

A

13.5 to 14.5 volts

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5
Q

What are the 2 configurations of an alternator rotor

A

B star and delta

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6
Q

How does a rectifier work

A

Only allows flow of electrons one way using diodes

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7
Q

How does a regulator work

A

It uses resistors to limit voltage output

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8
Q

What is the purpose of the iron claws on an alternator

A

To increase the magnetic field

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9
Q

What is the 2 starter motor types

A

Pre engaged and inertia

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10
Q

What are the negatives of a inertia starter motor

A

It is permanently on the starter motor which will make components wear more quickly

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11
Q

What is an advantage of a pre engaged starter motor.

A

It can retract using a solenoid which engages and disengaged the pinion

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12
Q

How does a pre engages starter motor circuit work

A

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

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13
Q

What does the brush pack do

A

Supply’s current to the commutator

Which allows drive in the component

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