capacitor (1)

CAPACITOR

EBOOK

TTE - P

King Mongkut's University
of Technology North
Bangkok

Miss. Natthaphon
Kanhachalee

Table of content 1
Definition of a Capacitor

2

construction of a capacitor

3

symbol of a capacitor

4

principle of a capacitor

5

Appilcation of a capacitor

07

Definition of a Capacitor

Capacitor (capacitor or condenser) is
an electronic device. serves to store
energy in an electric field created
between insulated pairs with the same
electric charge but have opposite
types of charge Sometimes this
capacitor is called a condenser
(condenser) is an important basic
device in electronics. and can be
found in almost every circuit

06

construction of a capacitor

A capacitor consists of two or more metal plates separated by
insulators, all of which are connected to a single coil.
Of the existing 2 lines, an electrical insulator called a dielectric
acts as a barrier to a constant flowing current when the
capacitor is connected to
The battery will cause current to flow for a short time. and an
electric charge will accumulate on the plate, the current will
stop flowing when the collector voltage is
This process draws energy from the battery, which is stored in
the dielectric, in the same way as the elastic of a storage
balloon.
where the capacitor blocks the constant flow of current but
allows the changing current to flow through, allowing us to use
it in the separation of various parts
of the circuit by maintaining different voltages While the signal
can still travel between parts, the capacitor is the device
involved.
Associated with the time spent controlling things to happen in
order.

symbol of a capacitor 07

Represented by the symbol “C” with the unit of farad “F”.

principle of a capacitor

Working Principle of Capacitor or Capacitor
That is, when the capacitor is connected to a circuit or a
complete power supply. We can observe that the current
cannot flow through the capacitor (looked as an Open Circuit)
because the capacitor has an insulator.
At the same time, an electric charge that cannot cross the
insulator is formed on the conductor plank. causing that side to
have a lot of negative electric charge (Electron) On the other
hand, the conduction plan on the opposite side becomes a
positive charge because many electrons flow to the other side.
The charge attached to the conductor plan of the capacitor is
because Each side has electric charges that are of opposite
polarity, creating an electric field that attracts each other (+
and – attracts each other), which allows capacitors to store
potential energy or voltage (Voltage).

07

Appilcation of a capacitor

Capacitors can store electrical energy when connected to a
charging circuit. and when disconnected from the charging
circuit The stored energy is then dissipated. So it can be used
as a temporary battery. Capacitors are commonly used in
electronic devices to maintain power supply while replacing
batteries. (to prevent data loss in volatile memory)
Conventional electrostatic capacitors have an energy density of
less than 360 joules per kilogram. while capacitors using
developing technologies can provide more than 2.52 kJ/kg of
energy [1].
In a car audio system, large capacitors store energy for the
amplifier to operate as needed.
Uninterruptible Power Supply (UPS) can be installed with
maintenance-free capacitors to extend its service life.

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