Here we read the Capacitor Definition: Define how many Types of Capacitor?
- Ceramic capacitor
- Mica capacitor
- Electrolytic capacitor
- Paper capacitor
- Ceramic capacitor
Capacitors Definition:
The store of electric charge started when observed the phenomena of ―Static electricity‖ approximately 200 years ago. The first capacitor was considered ―Laydon Jar‖ invented in 1745 by B.Franklin most important in the history of electrostatic.
After this invention Jars connected
in parallel to increase storage capacity by Daniel Gralath. Benjamin Franklin
work became more successful because he gives the idea to store the charge on
glass jar not in the water and he used term battery for storage (Yun Wang, Chen,
Mishler, Cho, & Adroher, 2011).
Initially the term condenser is used for capacitor, this term first time used in 1926. In start the capacitors only used in electronics and electrical devices due to low efficiency, now a time capacitors used in automobile, space, aircraft games and other power electronics. Capacitor use electric field to stores energy and storage capacity of capacitor is called capacitance.
The dielectric materials are used between the plates of capacitor
for separation of electrodes. We used many dielectrics between the plates of
capacitor air, mica, plastic film, vacuum, glass ceramics etc. Capacitors allow
alternating current (AC) to pass through circuit but stop direct current (DC)
because direct current does not have any frequency and dielectric between the
plates of capacitor.
Types of Capacitor:
Fixed capacitor:
For this capacitor the capacitance cannot be changed and
always fixed.
Variable Capacitor:
In case of variable capacitor the capacitance not fixed and
can be changed. Variable capacitors are most important and has many types few
important types are as fellow.
Types of fixed Capacitor:
- Ceramic capacitor
- Mica capacitor
- Electrolytic capacitor
- Paper capacitor
- Ceramic capacitor
Most popular and important types of capacitor is ceramic
capacitor due to unique characteristics like small size, high stability, high
temperature dependence, high voltage dependence. These characteristics makes
theses capacitors important in many fields like used in resonant circuits and
filters also used in coupling and power supply bypass (Burke, 2000).
Mica Capacitor:
This capacitor is called mica capacitor because mica is used
as a dielectric. Most important property of mica capacitor is low tolerance as
compared to ceramic capacitor also this capacitor is more stable because not
much changes in capacitance with time. This capacitor can be used at high
frequency because not dependent on frequency. Mica capacitor shows unique
performance at high temperature
Electrolytic Capacitor:
In this capacitor anode of metal formed oxide layered, which
act as dielectric. Oxide surface covered with solid or liquid which act as
cathode. The capacitance of electrolytic capacitor is very high due to large
surface area of anode and thin electrolytic layered. This capacitor is temperature
sensitive therefore extra care is required. The main disadvantage of this
capacitor is large amount of leakage current, short lifetime and explosion
issues (Johnson & Warren, 1951).
Paper Capacitor:
Another name used for paper capacitor is ―condenser‖ .This
capacitor store fixed amount of charge that’s why considering type of fixed
capacitor. Like other capacitor it consists of two electrodes and dielectric.in
these capacitor dielectric materials are paper instead of plastic, and made up
of aluminum sheet and paper sheet.
