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Solenoids
What is a Solenoid?
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A solenoid is simply a coil of wire which is tightly wound into a helix.
In an conducting wire, if electric current is passed, then it
generates a magnetic field (Ampere’s Law).
We can see that the direction of the current along the length
of the wire decides the direction of the magnetic field.
Using this principle, when current is passed through a tightly
wound coil of wire, it gives rise to a magnetic field that is
similar to that of a bar magnet!
What is a Solenoid?
BITS Pilani
What is a Solenoid?
BITS Pilani
Thus we have seen, that a tightly wound coil of wire generates a magnetic field
(when current is passed through it) that makes the coil act like a bar magnet.
It is important to note, that the magnetic field lines are present inside the solenoid
as well, whereas, while there exists magnetic field lines inside the magnet, there
is no way to make use of the same.
Solenoid Valve (or simply Solenoid)
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A solenoid valve is an electromechanical device in which the solenoid uses an
electric current to generate a magnetic field and thereby operate a mechanism
which regulates the opening of fluid flow in a valve.
A solenoid valve is often simply referred as a solenoid. For the rest of the
slides, a solenoid would refer to a solenoid valve.
Simplified diagram of a solenoid
Solenoid Valve (or simply Solenoid)
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In this simplified example, the solenoid is used to control air flow in a control system
Solenoid Valve (or simply Solenoid)
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Types of Solenoids
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BITS Pilani
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Pilani | Dubai | Goa | Hyderabad
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