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AUTOMOTIVE CHARGING SYSTEMS

AUTOMOTIVE CHARGING SYSTEMS. CHAPTER 7. 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

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AUTOMOTIVE CHARGING SYSTEMS

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  1. AUTOMOTIVE CHARGING SYSTEMS CHAPTER 7

  2. PURPOSE OF CHARGING SYSTEM • CONVERT MECHANICAL ENERGY INTO ELECTRICAL ENERGY • RECHARGE BATTERY • PROVIDE POWER FOR ELECTRICAL ACCESSORIES • RESERVE POWER WHEN NEEDED

  3. COMPONENTS OF CHARGING SYSTEM • BATTERY • ALTERNATOR • DRIVE BELT • VOLTAGE REGULATOR • CHARGE INDICATOR (LAMP OR GAUGE)

  4. TYPICAL CHARGING SYSTEM

  5. PG C165 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

  6. C167 FIG 7-6 COMPONENTS OF ALTERNATOR • FRONT HOUSING ( DRIVE END ) • REAR HOUSING ( COM END ) • STATOR • ROTOR • REGULATOR • BRUSHES • RECTIFIER ASSEMBLY • BRUSH HOLDER

  7. PG C167 & 168 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

  8. PG C169 ROTOR FIELD CIRCUIT • CONTROLS ALTERNAOTR OUTPUT • INCREASED FIELD CURRENT RESULTS IN INCREASED ALTERNATOR OUTPUT • TWO BRUSHES PROVIDE CONNECTION TO FIELD COIL

  9. 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.

  10. PG C170-173 STATOR WINDINGS • STATOR WINDING CONNECTIONS • WYE • DELTA • OVERLAPPING STATOR WINDINGS PRODUCE 33 PHASE ANGLES PAGE C-170

  11. PG C174-176 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.

  12. AC VOLTAGE EFFECT WITH DIODE OPERATION

  13. STATOR CURRENT FLOW PHASE 1A AND B POSITIVE

  14. STATOR CURRENT PHASE 2A AND C NEGATIVE

  15. STATOR CURRENT PHASE 3B AND C POSITIVE

  16. ALTERNATOR INTERNAL CIRCUITS • CHARGING CIRCUIT • STATOR WINDINGS AND RECTIFIER • EXCITATION CIRCUIT • FIELD COIL AND CONNECTIONS • PRE-EXCITATION CIRCUIT • SUPPLIES INITIAL CURRENT FOR FIELD COIL

  17. THE END STAY TUNED FOR FURTHER DEVELOPMENTS!

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