Transcript Charging System

A/C GENERATORS
PRINCIPLES
OF
OPERATION
OPERATION
The generator converts mechanical
energy into electrical energy.
Mechanical energy is given by means of a
drive belt, from the crankshaft.
MAJOR COMPONENTS
Housing ( drive and rear)
Rotor
Stator
Rectifier
Brush Assembly
Voltage Regulator (Integral)
Drive Pulley
Principles
HOUSINGS
Drive Housing: Supports the front of the
rotor shaft, as a large bearing pressed or
flanged bolted. Has mounting holes for
installation on to engine via a bracket.
End Housing: Anchoring point for Brush
holder, Regulator, Rectifier and Stator
assembly. Also supports the rear of the
rotor shaft via small bearing.
Housings
ROTOR
Purpose: The rotor is used to create a
magnetic field, and rotate that magnetic
field inside the stator at varying speeds.
Parts
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Projections (2) North and South
Rotor shaft
Field Windings
Slip Rings
ROTOR CONSTRUCTION
BRUSHES AND SLIP RINGS
Purpose: To direct current to the rotating
field windings
Connections

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F (field terminal) External
Voltage regulator (insulated)
Exciter Diodes
Brushes and Slip Rings
STATOR
Purpose: To collect
the magnetic field
created by the rotor
Parts
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3 or 4 phase windings
Laminated steel frame
Winding types
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Wye
Delta
Stator Construction
STATOR
The Stator produces a Analog Signal, that
produces Alternating Current
Output is determined by
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Magnetic field strength
Rotor speed
Winding type (delta or wye)
Winding length
Number of phases (windings)
Stator Operation
Rectification
Purpose: Change the current from AC to
DC
Parts
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Diodes: Three positive and three negative.
Exciter Diodes: Controls field current at
Startup giving us full field current after startup.
Heat Sink: Aluminum webbing linking diodes
to end frame.
Rectification Parts
Rectification Operation
Voltage Regulator
Purpose: To control the current flow
through the field windings.
Process: Switches current flow on and off
in the field windings, by watching line
voltage
Regulation