2013年8月9日星期五

the electromagnet formed by what

the electromagnet formed by what
With internal core, the use of a current through a coil it like a magnet with a magnetic device called a solenoid, English scientific name: Solenoid. Usually made from strip or horseshoe. Core magnetization easy to use, and easy to disappear magnetic soft iron or silicon to the system to do. Such a magnetic solenoid when energized, Magnetic Grate power outages after disappeared.
When inserted into the core inside the solenoid is energized, the solenoid is energized the magnetic core magnetization. The core is magnetized into a magnet, so that the two magnetic fields overlap each other, so that a magnetic solenoid greatly enhanced. To make a stronger magnetic electromagnet, usually made of iron horseshoe. But note that the coil wound on the core horseshoe opposite, while clockwise to counter-clockwise on the other side. If the wound in the same, the two coils of the magnetization cube magnets of the core will cancel each other out, so that no significant magnetic core. In addition, the electromagnet with a soft iron core to do, rather than using steel to do. Otherwise, once magnetized steel, but not the long-term magnetic demagnetization, then the strength of the magnetic current can not be used to control the size, and lose the advantages of the electromagnet should be.

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