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Charging system PT 1. http://www.youtube.com/watch?v=oYTrbDLSy_w. Charging System. Purpose. Purpose of charging system to keep battery at a fully charged state. Provide power for all electrical loads Alternator is the component that generates electricity to charge the battery. Principle.

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Charging system pt 1
Charging system PT 1

  • http://www.youtube.com/watch?v=oYTrbDLSy_w



Purpose
Purpose

  • Purpose of charging system to keep battery at a fully charged state.

  • Provide power for all electrical loads

  • Alternator is the component that generates electricity to charge the battery.


Principle
Principle

  • The principle of electromagnetic induction to generate electrical energy from mechanical energy

  • Electromagnetic induction involves the generation of an electrical current in a conductor when the conductor is moved through a magnetic field.


How do we increase electricity
How do we increase electricity

  • Demonstration with alternator on how electricity is generated.

  • How can we increase electricity


Increasing current
Increasing Current

  • Increasing the speed of the conductor through the magnetic field.

  • Increasing the number of conductors passing through the magnetic field

  • Increasing the strength of the magnetic field.


Ac and dc
AC and DC

  • AC– Alternating current

  • DC– Direct Current

  • Alternator generates AC voltage.

  • Automotive battery and vehicle system using DC voltage.


Ac and dc1
AC and DC

  • So what changes the AC to DC voltage.

  • The voltage Rectifier.

  • Rectifiers are consisted with six diodes.

  • Diodes are one way check valves that only allow current to flow one way.



What is the proper system voltage
What is the proper system voltage?

  • 13.8 - 15 volts

  • 27.4 – 28.4 volts



Voltage regulator
Voltage Regulator

  • Controls the voltage output of the alternator.

  • The regulator receives system voltage as an input, in order to regulate alternator output voltage.




Charging system pt2
Charging System PT2

http://www.youtube.com/watch?v=Yv4t795Yb5k&feature=related


What can cause the charging system to under charge
What can cause the charging system to under-charge?

  • Loose fan belt

  • Low engine RPM

  • Excessive load requirements (add on accessories)


What can cause the charging system to under charge1
What can cause the charging system to under-charge?

  • Short driving trips

  • Defective generator

  • Defective voltage regulator

  • Defective wiring







Full Wave Rectification …... three stator windings



voltage trace on oscilloscope rectification

(diode pattern)


Stator rectification

Rectifier (Diode pack)


How does the voltage regulator control the a c generator
How does the voltage regulator control the A/C generator? rectification

  • The regulator will turn on/off current to the field windings (rotor)

  • Increasing current to the rotor…

  • …will increase generator output


14 V rectification

80 o F

1 V



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