The first principle is that when the magnetic field near the metal changes, the electrons on the metal will move and generate current.
The second principle is the magnetic effect of current. When current flows in a wire or a piece of metal, a magnetic field is generated. The electrified coil becomes a magnet.
The third principle is that magnets will interact, the same polarity will repel each other, and different polarities will attract each other.
Maglev train is mainly composed of suspension system, propulsion system and guidance system. Although the propulsion system independent of magnetic force can be used, in most of the current designs, the functions of these three parts are completed by magnetic force.
Maglev train is a modern high-tech rail vehicle, which realizes non-contact suspension and guidance between the train and the track through electromagnetic force, and then the train is driven by electromagnetic force generated by linear motor.
1922, German engineer Herman Johnson put forward the principle of electromagnetic levitation, and then applied for a patent. Since the 1970s, with the increasing economic strength of industrialized countries, Germany, Japan, the United States and other countries have successively carried out research and development of magnetic levitation transportation systems to improve transportation capacity and meet the needs of their own economic development and people's lives.