Definition of electromagnet
An electromagnet is a device that generates electricity to produce an electromagnetic field.A conductive winding that is wound around the outside of an iron core to match its power.We usually make it into a strip or hoof shape to make the core easier to magnetize.In addition, in order to make the electromagnet degaussing immediately, we often use the soft iron or silicon steel material which degaussing faster.Such electromagnets are magnetic when energized and then disappear when the power is turned off.Electromagnet has been widely used in our daily life, because of its invention, the power of the generator has been greatly improved
When an iron core is inserted inside the energized solenoid, the core is magnetized by the magnetic field of the energized solenoid.The magnetized core also becomes a magnet, which makes the solenoid much more magnetic because the two magnetic fields are superimposed on each other.To make an electromagnet more magnetic, an iron core is usually shaped like a shoe.But notice that the coils on the hoof core go in the opposite direction, clockwise on one side and counterclockwise on the other.If the direction is the same, the magnetization of the two coils to the core will cancel each other, so that the core does not appear magnetic.In addition, the core of an electromagnet is made of soft iron, not steel.Otherwise, once the steel is magnetized, will remain magnetic for a long time and can not demagnetization, the magnetic strength can not be controlled by the size of the current, and the loss of electromagnet due to the advantages.
Generally speaking, the magnetic field produced by an electromagnet is related to the current, the number of coils and the ferromagnet in the center.In the design of electromagnets, attention will be paid to the distribution of coils and the choice of ferromagnets, and the size of the current to control the magnetic field.The material of the coil has resistance, which limits the size of the magnetic field an electromagnet can generate, but with the discovery and application of superconductors, there is an opportunity to go beyond that.thank you for reading!
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Definition of electromagnet
Definition of electromagnet
Definition of electromagnet