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Modern alternators like Dodge Alternator have
greater capacity compared with generators. Older car makes used
generators instead of alternators. Old generators have wound stater to
produce a magnetic field to move the armature or the revolving coil of
wire. On the edge of the armature are electrically insulated single
brass segments that serve as the supplier of current to other auto
parts to keep the vehicle moving. Each segment is connected to the
armature shaft which is considered as a mechanical weakness sine as the
armature rotates at high rpm, the centrifugal force produced can cause
explosion which can destroy the segments. Explosion can also be
prevented by having slower acceleration but it can produce low engine
rpm to generate the needed current.
The modern alternator also has the same features but
the function of each part is made much easier because of new and
advance components. Like the generator it also has moving and
stationary wire coils. The moving coil or the rotor generates a moving
field while the stationary wire coils give off the power. The moving or
rotating wires generates a magnetic field together with alternating
current that would depend on the speed of the coils. The stationary
coils on the other hand are made up of three stationary windings to
produce three-phase alternating current. The former responsibility of
the commutator to convert AC to DC power is now performed by the
alternator diodes positioned in the full-wave bridge rectifier circuit.
Regular check-up of your alternator is needed
to avoid failures in performance. The failures usually happen in
stages. The first stage of failure usually occurs on the stationary
windings. The diodes on the windings can fail one at a time. Its
condition can be checked by simply using a voltmeter. Be sure to turn
off all the auto parts and car accessories that need power before using
the voltmeter on the car. A simple noise can also be a sign of
alternator failure. The cause of distracting noise must be properly
directed or else the wrong part may be tampered and cause further
problems and defects.
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