A solenoid works on the principle of “electromagnetism”. When current flows through the coil a magnetic field is generated, now, if you place a metal core inside the coil, the magnetic lines of flux are concentrated on the core which increases the induction of the coil.
A majority of the flux is present around the core, while some of the it appears at the ends of the coil and a small amount also appears outside the coil.
The magnetic strength of the solenoid can be increased by either increasing the number of turns or by increasing the current flow to the coil.
As a magnet, it also has positive and negative poles and either attracts or repels an object, accordingly.
They are largely used for commercial purposes. AC Laminates solenoids are powerful enough to produce a longer and stronger first stroke with immense force.
It derives its name as the frame with which it is build, resembles the shape of the letter “C”. They are highly economical and give a great performance.
It comprises of a frame that has two components, resembling the letter “D”. They are usually used in electromechanical relays, valves and in commercial vehicles transmissions to change amid various gears.
It is the most commonly visible solenoid that most people have seen. It converts an electrical signal into a magnetic field and thereby produces a linear motion. It is most commonly used in door locks and hydraulic valves.
In a rotary solenoid a circular disc is used along with a core and a coil. The solenoid is lined up with the grooves and three ball bearings are used to convert linear motion into rotary motion.
They are found in most locking systems, like door looks for home, office, hotels etc.
They are used in medical healthcare industry, in a dialysis machine where two solenoids control the flow of blood.
Additionally, the dosing machine also makes use of an solenoid to control, how much medicine is being injected into a person’s blood.
Solenoid valves are also used to control water pressure in sprinkler systems, pressure of the air in an air conditioning system, and many more real-life applications.
Solenoids are extremely sensitive to the voltage of the electric current that passes through it.
The coil wire may have to replaces if continuous usage is required.
