Transcript AUTOMOTIVE CHARGING SYSTEMS

AUTOMOTIVE CHARGING SYSTEMS
PURPOSE OF CHARGING SYSTEM
 CONVERT MECHANICAL ENERGY INTO
ELECTRICAL ENERGY
 RECHARGE BATTERY
 PROVIDE POWER FOR ELECTRICAL
ACCESSORIES
 RESERVE POWER WHEN NEEDED
COMPONENTS OF CHARGING
SYSTEM
 BATTERY
 ALTERNATOR
 DRIVE BELT
 VOLTAGE REGULATOR
 CHARGE INDICATOR (LAMP OR GAUGE)
TYPICAL CHARGING SYSTEM
ALTERNATING CURRENT OPERATION
 ELECTROMAGNETIC INDUCTION TO PRODUCE
ELECTRICAL POWER
• VOLTAGE WILL BE PRODUCED IF MOTION BETWEEN
A CONDUCTOR AND A MAGNETIC FIELD OCCURS.
 AMOUNT OF VOLTAGE IS AFFECTED BY:
• SPEED OF CONDUCTOR PASSING THROUGH FIELD
• STRENGTH OF MAGNETIC FIELD
• NUMBER OF CONDUCTORS PASSING THROUGH
MAGNETIC FIELD
COMPONENTS OF ALTERNATOR
FRONT HOUSING ( DRIVE END )
 REAR HOUSING ( COM END )
 STATOR
 ROTOR
 REGULATOR
 BRUSHES
 RECTIFIER ASSEMBLY
 BRUSH HOLDER

ROTOR
COPPER WIRE WOUND
AROUND A IRON CORE
 CURRENT PASSING
THROUGH ROTOR
CREATES A MAGNETIC
FIELD
 MAGNETIC FIELDS
PRODUCE A VOLTAGE BY
INDUCTION IN STATOR
WINDINGS

ROTOR FIELD CIRCUIT
CONTROLS ALTERNAOTR
OUTPUT
 INCREASED FIELD
CURRENT RESULTS IN
INCREASED
ALTERNATOR OUTPUT
 TWO BRUSHES PROVIDE
CONNECTION TO FIELD
COIL

STATOR
THREE SETS OF
WINDINGS AROUND
LAMINATED CORE
 SMALL GAP BETWEEN
ROTOR AND STATOR
PERMITS FIELD CIRCUIT
TO ENERGIZE WINDINGS
OF STATOR AT THE SAME
TIME.

STATOR WINDINGS

STATOR WINDING CONNECTIONS
• WYE
• DELTA

OVERLAPPING STATOR WINDINGS PRODUCE 33
PHASE ANGLES PAGE C-170
DIODE RECTIFIER BRIDGE
 CHANGES NEGATIVE CURRENT INTO POSITIVE
OUTPUT
 CONVERTS AC (ALTERNATING) VOLTS TO
PULSING DC VOLTS
 3 POSITIVE BIASED DIODES
 3 NEGATIVE BIASED DIODES
 NUMBER OF POLES ON ROTOR AND NUMBER OF
PHASES ON STATOR WILL DETERMINE HOW
SMOOTH OUTPUT IS.
AC VOLTAGE EFFECT WITH DIODE
OPERATION
STATOR CURRENT FLOW PHASE 1
A AND B POSITIVE
STATOR CURRENT PHASE 2
A AND C NEGATIVE
STATOR CURRENT PHASE 3
B AND C POSITIVE
ALTERNATOR INTERNAL CIRCUITS
 CHARGING CIRCUIT
• STATOR WINDINGS AND RECTIFIER
 EXCITATION CIRCUIT
• FIELD COIL AND CONNECTIONS
 PRE-EXCITATION CIRCUIT
• SUPPLIES INITIAL CURRENT FOR FIELD COIL
THE END
STAY TUNED FOR FURTHER
DEVELOPMENTS!