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

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Presentation on theme: "1 CHARGING SYSTEMS Induced Voltage AC Charging Systems Preliminary Checks AC Generator Service Converts Mechanical Energy into Electrical Energy."— Presentation transcript:

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

2 2 INDUCED VOLTAGE 3 Stationary Windings (stator) Rotating Claw Shoes (rotor) 12 Volts – 300 Volts Out normal output13-15 volts

3 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 4 ALTERNATOR COMPONETS Rotor Stator Housings/ Frame Shaft & Bearings Drive Pulley & Fan Diodes Regulator Terminals Slip Rings Cooling Fan Belts

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

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

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

8 8 DRIVE END FRAME

9 9 CAPACITOR

10 10 DIODE TRIO

11 11 BRUSH HOLDER

12 12 VOLTAGE REGULATOR

13 13 HEAT SINK & RECTIFIER

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

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

16 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 17 VOLTAGE REGULATION o Integral Regulator o Uses Transistors and a Zener Diode o Controls current to the Field Winding in the Rotor o Low Voltage On o High Voltage Off

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

19 19 Old Voltage Regulators

20 20 Indicators Indicator Lights Voltmeter Ammeter

21 21 Basic Checks Safety Precautions Inspection General Tests

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

23 23 ALTERNATOR LAB Disassemble alternator Learn all parts Pass instructors quiz Learn operation Pass instructors quiz Reassemble alternator


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