| Tweet |
Custom Search
|
|
|
||
 ELECTRICAL SYSTEM
SYSTEMS OPERATION
ELECTRICAL SYSTEM
The electrical system has three separate circuits:
iron core) now increases the strength of the magnetic
the charging circuit, the starting circuit and the low
lines of force. These stronger lines of force now increase
amperage circuit.
Some of the electrical system
the amount of AC current produced in the stator
components are used in more than one circuit. The
windings. The increased speed of the rotor assembly
battery (batteries), circuit breaker, ammeter, cables and
also increases the current and voltage output of the
wires from the battery are all common in each of the
alternator.
circuits.
The charging circuit is in operation when the
engine is running. An alternator makes electricity for the
charging circuit. A voltage regulator in the circuit controls
the electrical output to keep the battery at full charge.
The starting circuit is in operation only when the
start switch is activated.
The low amperage circuit and the charging circuit
are both connected to the same side of the ammeter.
The starting circuit connects to the opposite side of the
CHARGING SYSTEM COMPONENTS
Alternator
ALTERNATOR
The alternator is driven by V-type belts from the
The voltage regulator is a solid state (transistor,
crankshaft pulley. This alternator is a three phase, self-
stationary parts) electronic switch. It feels the voltage in
rectifying charging unit, and the regulator is part of the
the system, and switches on and off many times a
alternator.
second to control the field current (DC current to the field
windings) to the alternator. The output voltage from the
This alternator design has no need for slip rings
alternator will now supply the needs of the battery and
or brushes, and the only part that has movement is the
the other components in the electrical system.
rotor assembly. All conductors that carry current are
stationary. The conductors are: the field winding, stator
NOTICE
windings, six rectifying diodes, and the regulator circuit
components.
Never operate the alternator without the battery in
the circuit.
Making or breaking an alternator
The rotor assembly has many magnetic poles
connection with heavy load on the circuit can cause
like fingers with air space between each opposite pole.
damage to the regulator.
The poles have residual magnetism (like permanent
magnets) that produce a small amount of magnetlike
STARTER SYSTEM COMPONENTS
lines of force (magnetic field) between the poles. As the
rotor assembly begins to turn between the field winding
Starter Motor
and the stator windings, a small amount of alternating
current (AC) is produced in the stator windings from the
The starter motor is used to turn the engine
small magnetic lines of force made by the residual
flywheel fast enough to gel the engine running.
magnetism of the poles. This AC current is changed to
direct current (DC) when it passes through the diodes of
The starter motor has a solenoid. When the
the recitifer bridge. Most of this current goes to charge
start switch is activated, electricity will flow through the
the battery and to supply the low amperage circuit, and
windings of the solenoid. The solenoid core will now
the remainder is sent on to the field windings. The DC
move to push the starter pinion, by a mechanical
current flow through the field windings (wires around an
88
|
||
|
||
