The device is powered to produce a electromagnetic. The conductive winding is wound around the external of iron core, which matched with each other. The current coil like a magnet with magnetic, it is also called electro-magnet (electromagnet). We usually made it a strip or the hoof shape so that the iron core is more easily magnetized. In addition, in order to make the electromagnet power degauss in a time, we often use the degaussing faster soft iron or silicon steel materials as iron core.
When energized solenoid is inserted with iron core, the core was magnetized. The magnetized iron core becomes a magnet, the solenoid magnetic greatly enhanced after the two magnetic field superimposed on each other. In order to make the electromagnet of the magnetic stronger, iron core is usually made of hoofed. But the hoofed core coil should be wound in opposite direction, one side is clockwise, the other side must be counterclockwise. The two coils magnetic will cancel each other out, if wound in same direction. Besides, the electromagnet core with a soft iron instead of steel. Otherwise, once steel was magnetized, which will keep magnetic for long time and can not demagnetization. As a result, the magnetic strength can not be controlled by current and lose the advantages of electromagnet.
Electromagnet has many advantages: the presence or absence of the electro-magnet magnetic can be controlled by used, breaking current. The magnetic strength can be controlled with the strength of the current or the number of turns of the coil; It can also regulated by the resistor to control current. Moreover, the... [continues]
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(2012, 04). Electromagnetic Coil Applied in Magnetic Separators. StudyMode.com. Retrieved 04, 2012, from http://www.studymode.com/essays/Electromagnetic-Coil-Applied-In-Magnetic-Separators-983264.html
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"Electromagnetic Coil Applied in Magnetic Separators." StudyMode.com. 04, 2012. Accessed 04, 2012. http://www.studymode.com/essays/Electromagnetic-Coil-Applied-In-Magnetic-Separators-983264.html.