Kaalaman sa Hanapbuhay: Electrical Components

Sunday, March 25, 2012

Electrical Components

Electrical Components
POWER SOURCE
Power is supplied to the
vehicle by two devices: The
battery and the alternator. The
battery supplies electrical
power during starting or
during periods when the current demand of the
vehicle's electrical system
exceeds the output capacity of
the alternator. The alternator
supplies electrical current
when the engine is running. Just not does the alternator
supply the current needs of the
vehicle, but it recharges the
battery.

The Battery
In most modern vehicles, the
battery is a lead/acid
electrochemical device
consisting of six 2 volt
subsections (cells) connected in
series, so that the unit is capable of producing
approximately 12 volts of
electrical pressure. Each
subsection consists of a series
of positive and negative plates
held a short distance apart in a solution of sulfuric acid and
water.

The two types of plates are of
dissimilar metals. This sets up
a chemical reaction, and it is
this reaction which produces
current flow from the battery
when its positive and negative terminals are connected to an
electrical load . The power
removed from the battery is
replaced by the alternator,
restoring the battery to its
original chemical state.

The Alternator
On some vehicles there isn't an
alternator, but a generator. The
difference is that an alternator
supplies alternating current
which is then changed to direct
current for use on the vehicle, while a generator produces
direct current. Alternators tend
to be more efficient and that is
why they are used.

Alternators and generators are
devices that consist of coils of
wires wound together making
big electromagnets. One group
of coils spins within another
set and the interaction of the magnetic fields causes a
current to flow. This current is
then drawn off the coils and
fed into the vehicles electrical
system.

GROUND
Two types of grounds are used
in automotive electric circuits.
Direct ground components are
grounded to the frame through
their mounting points. All other
components use some sort of ground wire which is attached
to the frame or chassis of the
vehicle. The electrical current
runs through the chassis of the
vehicle and returns to the
battery through the ground (-) cable; if you look, you'll see
that the battery ground cable
connects between the battery
and the frame or chassis of the
vehicle.
NOTE: It should be noted that a
good percentage of electrical
problems can be traced to bad
grounds.

LOAD
Every electrical circuit must
include a "load'' (something to
use the electricity coming from
the source). Without this load,
the battery would attempt to
deliver its entire power supply from one pole to another. This
is called a "short circuit." All
this electricity would take a
short cut to ground and cause a
great amount of damage to
other components in the circuit by developing a tremendous
amount of heat. This condition
could develop sufficient heat
to melt the insulation on all the
surrounding wires and reduce
a multiple wire cable to a lump of plastic and copper.

Credit:
http://www.freeautomechanic.com/wiringproblems%202.html

1 ilaw ay 5 ampere. Kapag 4
ang ilaw 5 x 4 = 20 Kay 20
ampere na fuse ang
gagamitin./

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auto wiring website

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Sunday, March 25, 2012

Electrical Components

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