1. CHARGING SYSTEMS Induced Voltage AC Charging Systems
Preliminary Checks
AC Generator Service
Converts Mechanical Energy into
Electrical Energy

2. INDUCED VOLTAGE 3 Stationary Windings (stator)
Rotating Claw Shoes (rotor)
12 Volts – 300 Volts Out
normal output volts

3. AUTOMOTIVE CHARGING SYSTEM
Purpose:
(1) Provide electrical power to the vehicle while the engine is running
(2) Charge the battery
Components: Alternator, Voltage Regulator, Wiring, Indicator, Drive Belt

4. ALTERNATOR COMPONETS Rotor Stator Housings/ Frame Shaft & Bearings
Terminals
Slip Rings
Cooling Fan
Belts
Rotor
Stator
Housings/ Frame
Shaft & Bearings
Drive Pulley & Fan
Diodes
Regulator

5. STATOR Stator is stationary Does not move
Electricity is induced in the stator

6. ROTOR Rotor Rotates-spins Magnetic field is made in ROTOR
2 pole shoes N and S
Windings
Slip rings

7. SLIP RING END FRAME
BAT terminal
hot at all times

8. DRIVE END FRAME

9. CAPACITOR

10. DIODE TRIO

11. BRUSH HOLDER

12. VOLTAGE REGULATOR

13. HEAT SINK & RECTIFIER

14. ALTERNATOR OPERATION Three items necessary to produce current flow
1- Conductors (stator)
2- Magnetic Field (rotor)
3-Motion (belt drive from crankshaft)

15. Alternator Operation DC Rectification Voltage Regulation
Half Wave
Full Wave
Voltage Regulation
Sensing Voltage
Field Circuits

16. CONVERTING AC to DC
Alternator produces AC due to north and south magnet
Diode blocks current flow in one direction converting AC to DC
Current flow is DC at battery terminal

17. VOLTAGE REGULATION Integral Regulator
Uses Transistors and a Zener Diode
Controls current to the Field Winding in the Rotor
Low Voltage On
High Voltage Off

18. Electronic Regulators
Integrated Circuit Voltage Regulators
Fail-Safe Circuits
Computer Regulation

19. Old Voltage Regulators

20. Indicators
Indicator Lights
Voltmeter
Ammeter

21. Basic Checks
Safety Precautions
Inspection
General Tests

22. General Tests Voltage Output Test Current Output Test
Regulator Bypass Test
Oscilloscope Checks
Circuit & Ground test

23. ALTERNATOR LAB Disassemble alternator Learn all parts
Pass instructor’s quiz
Learn operation
Reassemble alternator