Solenoid with a core definition of internal use of electric current through a coil to make it like a magnet has a magnetic device called a solenoid (electromagnet). Usually made of a bar or horseshoe. Core magnetization easy to use, and easy to disappear magnetic soft iron or silicon to the system to do. Such magnetic solenoid when energized, power outages after the disappeared. Electromagnet has an extremely wide range of applications in daily life. Electromagnet invention also makes the generator power has been greatly improved. Application electromagnet has an extremely wide range of applications in daily life. Electromagnet is a current magnetic effect (electric magnetism) of an application, are closely connected, such as electromagnetic relays, electromagnetic crane, magnetic levitation trains and life. DC solenoids and solenoid can be divided into two types of AC solenoids. If use according to divide the electromagnet, can mainly be divided into the following five kinds: (1) traction magnet - mainly used for pulling mechanism to open or close the valves, to perform automatic control tasks. (2) lifting magnet - used as a lifting device for lifting steel ingot, steel, iron ore and other ferromagnetic materials. (3) the brake magnet - mainly used for motor parking brake in order to achieve an accurate aim. (4) Automatic electrical electromagnetic systems - such as electromagnetic relays and contactors electromagnetic system automatically switches the electromagnetic release and operating electromagnet and so on. (5) other uses electromagnets - such as grinding and electromagnetic sucker electromagnetic vibrator. Maglev trains since about 200 years ago, Stephenson's "Rocket" steam locomotive railroad came the most fundamental breakthrough technology. Maglev trains today seems a novelty to see a male magnet, in fact, it's theoretical preparation has a long history. Maglev technology research from Germany, early in 1922 the German engineer Hermann Kemper put forward the principle of electromagnetic levitation, maglev train and apply for a patent in 1934. 70 years after entering the magnet, with the world's industrialized countries continue to strengthen economic strength, to improve transportation capacity to meet the needs of their economic development round pie magnets, and Germany, Japan, the United States, Canada, France, Britain and other developed countries have begun planning to develop maglev transportation system. Application Chinese NdFeB magnets NdFeB application follows the application of high-tech products accounted for 37% of the field, such as magnetic resonance imaging (MRI), the phone vibrates, hard drive voice coil (VCM), disc (DVD, CD- ROM) drive shaft, power tools, electric vehicles, inverter air conditioner engine. Application of traditional areas of affordable products accounted for 63%, such as audio devices, magnetic adsorption devices, magnetic devices, magnetic devices. Liaoning magnet motor magnets _ _ Xin Tong new magnetic provided by the Dongguan City, Tong Xin magnetic Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) strong, credible, in Dongguan, Guangdong magnetic materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the new Tong Xin magnetic and you hand into the brilliant, for a better future!