1 CHARGING SYSTEMS Induced Voltage AC Charging Systems Preliminary Checks AC Generator Service...
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Transcript of 1 CHARGING SYSTEMS Induced Voltage AC Charging Systems Preliminary Checks AC Generator Service...
1
CHARGING SYSTEMS
Induced Voltage
AC Charging Systems
Preliminary Checks
AC Generator Service
Converts Mechanical Energy into
Electrical Energy
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INDUCED VOLTAGE3 Stationary Windings (stator)
Rotating Claw Shoes (rotor)
12 Volts – 300 Volts Out
normal output13-15 volts
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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
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ALTERNATOR COMPONETS
Rotor
Stator
Housings/ Frame
Shaft & Bearings
Drive Pulley & Fan
Diodes
Regulator
TerminalsSlip RingsCooling FanBelts
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STATORStator is stationary
Does not move
Electricity is induced in the stator
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ROTOR
Rotor Rotates-spins
Magnetic field is made in ROTOR
2 pole shoes N and S
Windings
Slip rings
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SLIP RING END FRAME
BAT terminal
hot at all times
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DRIVE END FRAME
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CAPACITOR
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DIODE TRIO
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BRUSH HOLDER
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VOLTAGE REGULATOR
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HEAT SINK & RECTIFIER
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ALTERNATOR OPERATION
Three items necessary to produce current flow1- Conductors (stator)2- Magnetic Field (rotor)3-Motion (belt drive from crankshaft)
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Alternator Operation
DC RectificationHalf WaveFull Wave
Voltage RegulationSensing Voltage
Field Circuits
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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
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VOLTAGE REGULATION
o Integral Regulatoro Uses Transistors and
a Zener Diodeo Controls current to
the Field Winding in the Rotor
o Low Voltage Ono High Voltage Off
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Electronic Regulators
Integrated Circuit Voltage Regulators
Fail-Safe Circuits
Computer Regulation
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Old Voltage Regulators
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Indicators
Indicator Lights
Voltmeter
Ammeter
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Basic Checks
Safety Precautions
Inspection
General Tests
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General Tests
Voltage Output Test
Current Output Test
Regulator Bypass Test
Oscilloscope Checks
Circuit & Ground test
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ALTERNATOR LAB
Disassemble alternator
Learn all parts
Pass instructor’s quiz
Learn operation
Pass instructor’s quiz
Reassemble alternator