What is the difference between NdFeB magnets and electromagnets?
Time:04/30/2019
Electromagnet The inner part of the electromagnet with a core and the current-carrying coil is called a magnet. The assembly is usually made into a strip or a shoe. The core should be made of simple magnetization and simply loose magnetic soft iron or silicon steel. How many electromagnets are magnetic when energized, and they are lost after power is turned off. Electromagnets have many advantages: the magnetism of an electromagnet can be controlled with on and off currents. The magnetic size can be controlled by the strength of the current or the number of turns of the coil, or the resistance can be manipulated to control the size of the current to control the magnetic size. Electromagnets are extremely widely used in everyday life. Electromagnets are a use of current magnetic effects (electro-magnetic), which are closely related to the days, such as electromagnetic relays, electromagnetic cranes, maglev trains, etc.
2 strong magnets A mineral deposit, magnetite, NdFeB magnets are not invented by humans. There are natural magnetizes. The earliest discovered and used magnets should be Chinese. Therefore, the "compass" is one of the four major inventions of our country. As for the composition, it is iron, cobalt, nickel, etc. Its atomic structure is extraordinarily planned, and the atom itself has a magnetic moment. The same ordinary mineral molecules are placed out of tune. The magnetic regions interact with each other to show no magnetism. But in external forces (such as magnetic fields) Under the guidance, the direction of molecular orientation tends to be equal. It shows magnetism. It is also known as magnet. Iron-cobalt-nickel is the most commonly used magnetic material. Basic magnets are divided into permanent magnets and soft irons. The spin of the material and the angular momentum of the electrons are placed in a fixed direction. The soft magnetic field is added with current (also a method of adding magnetic force). When the current is removed, the soft iron will gradually lose its magnetic properties.
