Magnet development in 1822, the French physicist Arago and Lussac found that when the current through the winding which has iron, which enables winding of the iron magnetic magnet. This is actually the initial discovery of the principle of the electromagnet. 1823, Sturgeon also did a similar experiment: He is not in a U-shaped magnet rod iron bars around the 18 laps bare copper, copper wire and a voltaic battery when turned Jiangmen Enping injection magnets around the U-shaped iron bars of copper coil that generates a magnetic field intensity, thus making a U-shaped piece of iron bar into a "magnet." This magnet permanent magnet magnetic energy than the energy amplification times, it can pick up more than 20 times its weight of iron, and when the power is turned off, U-iron iron bar on what it could not suck again become a Root ordinary iron bar. Sturgeon electromagnet invention, so that people see the electrical energy into magnetic energy of a bright future for this invention quickly spread in the United Kingdom, the United States and Western Europe, some coastal countries. 1829, US electricity scientist Henry Sturgeon electromagnet device made some innovations, wires instead of bare copper wire, copper wire and therefore do not have to worry about being too close and short circuit. Due to the wire with the insulation, they can be wound tightly around the enclosure together, due to the more intensive the coil, the stronger the magnetic field is generated, thus greatly improving the ability to convert electrical energy into magnetic energy. To 1831, Henry trial out an update of the electromagnet, although its size is not large, but it can pick up the one-ton iron. Electromagnet invention also makes the generator power has been greatly improved. Magnets can be grouped into "permanent magnet" and "non-permanent magnets." The permanent magnet may be a natural product, also known as natural magnet Jiangmen Jianghai injection magnet to be manufactured by a human (the strongest magnets are neodymium magnets). The non-permanent magnet, and only under certain conditions be magnetic, usually in the form of an electromagnet to produce, that is, using a current to strengthen the magnetic field. Definition magnet, the magnet should be called, in English: Magnet, Magnet mainly divided into two categories, one is soft, one is hard-magnetic. The concept includes soft silicon and soft core; hard magnetic include alnico, SmCo, ferrite and NdFeB, of which, the most expensive is samarium cobalt magnets, ferrite magnets cheapest The highest performance NdFeB magnets, but the most stable performance 肇庆怀 set injection magnet, the temperature coefficient of the best is Alnico, the user can select a different hard magnetic products according to different needs. We are talking about magnets, the magnets are generally refers to the permanent magnet. Permanent magnet is divided into two large magnets classification. Zhaoqing injection magnet magnetic new Xin Tong, injection magnet provided by the Dongguan City, Tong Xin magnetic Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) is Dongguan, Guangdong, magnetic leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the new Tong Xin magnetic leadership with the staff warmly welcome all inquiries to discuss, with new magnetic Tong Xin a better future.