Home
Flashcards
Preview
Charging Systems & Control Circuits Part 1
Home
Get App
Take Quiz
Create
Charging System - what is it's purpose ?
to provide the electrical power required to operate the vehicle electrical components and to recharge the battery whenever necessary.
Charging Systems converts _______ energy into _______ energy ?
Mechanical Energy into Electrical Energy.
What are the 2 Stator types ?
Y-Wound Stators & Delta-Wound Stators
Y-Wound Stators - name 3 points
has a neutral junction
two windings always form a series circuit between a positive & a negative diode.
Y-Wound Stators produce more voltage at
lower
generator speeds.
Delta-Wound Stators - name 3 points
has
NO
neutral junction
the windings always form 2 parallel circuit paths between a positive and 2 negative diodes
have greater current output a higher speeds but do not deliver as much current at lower
speeds
Brushes ride __________.
on the surface of the slip rings.
What is a Sine Wave ?
distinctive wave form of AC voltage produced by a passing a magnet past a conductor.
A cycle ?
is one complete sine wave - when referring to an AC voltage event.
Frequency ? 2 - Points
Measured in Hertz (Hz) events in one second
measurement of how many times an event occurs in a fixed time frame.
Alternating Current in a generator is rectified by:
diodes.
The component that is turned by the generator drive belt and creates a rotating magnetic field is the:
Rotor
Automotive generators w/ 3 stator windings generally us _______ diodes to rectify the output current.
6
Generator brushes ride on _____ to feed current to the rotors windings.
Slip Rings.
The regulator in a charging system device that controls:
Voltage levels in the charging systems.
Generator output is directly related to:
field strength & rotor speed.
Voltage Regulators (purpose)
limit voltage produced by a generator by controlling the field current in the generator rotor winding.
Most Voltage Regulators operate in the range of:
13.0V - 15.5V
What is the purpose of the Generator Output Test ?
is to determine whether the generator is capable of delivering its specified current output.
Charging Systems test are performed using: (3 answers)
a multimeter
an oscilloscope
a load tester
A voltage drop of more than ____ indicates high resistance in ground wiring of the charging systems.
0.2V
Positive Circuit Voltage Drop Connections - where do you hook up the leads hombre ?
Connect the Voltmeter's positive lead to the generator output terminal and the voltmeter's negative lead to the positive battery terminal.
Ground Circuit Voltage Drop Connections - How are the leads hook'd up ? Hombre ?
connect the voltmeter's negative lead to the generator housing and the voltmeter's positive lead to the negative battery terminal.
If the generator drive belt tension is adjusted too tightly: (2 answers)
the belt will wear out prematurely
the generator pulley and bearings can be damaged.
A generator drive belt in poor condition and not tensioned properly will result in an:
an undercharge battery
a squealing noise after the engine is started
Duty Cycle
Duty cycle is a measurement of % of a cycle that current is flowing (on time)
What should be the first step - beginning with any electrical system repairs ?
Disconnect the negative battery.
Windings that are dark & burnt are an indication of a ________ ? (Rotor Checks)
short rotor winding.
Continuity Test ? (2 points)
Check resistance across the slip rings using an
ohmmeter
.
Resistance should be between 1.5 to 4.0 ohms at
room temperature
How to check Rotor for a Short-To-Ground
place the ohmmeter leads between the slip rings and rotor shafts. You should have an infinite reading - indicating no continuity to ground.
Stator Continuity Test
Using a digital ohmmeter, test for continuity between each pair of stator leads.
maximum
resistance should be less than 0.5 ohms
How to test for Opens & Internal Shorts on Delta Windings ?
Due to the design of Delta-Wound stators, they
cannot
be checked for opens & internal shorts.
Stator Ground Tests
Using a ohmmeter to check the resistance between a stator lead and the stator frame.
Ohmmeter should read infinite.
When checking rectifier diode
One side will be open & one side will have a resistance reading.
Internal Voltage Regulator
A-Type, its powered all the time & regulates on the ground side (PCM or Case Ground)
External Voltage Regulator
B-Type, its grounded all the time & regulated on the power side.
Semiconductors - definition
can conduct or block electrical current.
Diodes
allow current to flow through them in one direction.
one way check valve
Capacitors
hav the ability to absorb & store electrical charges and then release it into the circuit
are used for electrical noise and voltage spike suppression.
Rectification
Since a diode will allow current to flow in one direction and not the other, it can be used to turn AC to DC.
Zener Diode
Allows current to flow in reveres bias at a specific voltage without damage.
allows reverse current flow above a set reverse voltage.
Anode
Positive
Cathode
Negative
NPN
Not Pointing in
PNP
Pointing IN
Transistors
Acts as an electrical switch in a circuit.
The maximum current output of an alternator is regulated by:
the design of the stator winding.
Author
Ordonez
ID
299056
Card Set
Charging Systems & Control Circuits Part 1
Description
Charging Systems, Diagnosis, Procedures & Service.
Updated
3/25/2015, 5:56:59 AM
Show Answers
Home
Flashcards
Preview