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Title: Types and Functions of different capacitors
Description: Images of different types of capacitors including their function and operation. Includes Paper, Mica, Electrolytic, Polystyrene and Variable Air Dialectric Capacitors.
Description: Images of different types of capacitors including their function and operation. Includes Paper, Mica, Electrolytic, Polystyrene and Variable Air Dialectric Capacitors.
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Mark Garrood
Task 2
P4 – Describe the different types and functions of capacitors
i)
Paper Capacitor
Paper capacitors are made of thin alternating layers of paper and metal foil, which acts
as a conductor
...
The paper capacitors are wax sealed to
prevent the leakage of current, caused by moisture and corrosion
...
They are also used as suppressors in high voltage transient applications for motor
circuits
...
The capacitor is then coated in an epoxy resin to protect it from corrosion and moisture
...
The most common reason for using a mica
capacitor is their stability when being used in an electrical circuit
...
One of the aluminium layers is coated in an electrolysed oxide layer
while the other one isn’t, of which acts as the cathode, while the coated one acts as the anode
...
Electrolytic capacitors are used in input/output smoothing
...
One major use for this type of capacitor is that of inside an
audio amplifier to reduce mains humming
...
Then this is rolled to create the cylindrical shape typical of a
polystyrene capacitor
...
Polystyrene capacitors can mainly be found on motherboards etc
...
v)
Variable Air Dielectric Capacitor
The variable air dielectric capacitor is made up of two sets of semi-circular plates
...
The two sets of plates have an air
gap between them to allow the overlap between the two sets of plates
...
This type of capacitor is used in A
...
circuit, to tune radio antennas and MRI scanners in hospitals,
and, because they are non-magnetic, they can be used in strong magnetic fields
...
...
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Title: Types and Functions of different capacitors
Description: Images of different types of capacitors including their function and operation. Includes Paper, Mica, Electrolytic, Polystyrene and Variable Air Dialectric Capacitors.
Description: Images of different types of capacitors including their function and operation. Includes Paper, Mica, Electrolytic, Polystyrene and Variable Air Dialectric Capacitors.