Brief introduction of maglev train
The key of magnetic levitation technology mentioned here refers to the magnetic levitation technology widely used at present. Electromagnetic levitation (EML) technology is referred to as EML technology for short, and its key principle is to realize the suspension support of metal objects by using eddy currents generated on the metal surface by high-frequency electromagnetic fields.
Brief introduction of maglev train
It is mentioned in the short film that Volkswagen's magnetic levitation spherical vehicle relies on rich magnetic pulses underground to provide suspension power. There is a very big problem here. The distribution of magnetic poles of magnetic pulse is irregular (it is uncertain whether the N pole or the S pole is up), so the maglev vehicle needs &; Ldquo gay exclusion. Principle To realize levitation, a superconducting electromagnet must be used instead of a permanent magnet with a fixed magnetic pole (it can keep diamagnetism continuously under the action of an external magnetic field).
However, if the superconducting electromagnet needs to work (the mainstream technology now is low-temperature superconductivity, although there is room-temperature superconductivity technology in China, it is still too early to apply for a patent nationwide), how to meet the working conditions of superconductor on such a small car body is a problem (the key is to supply a low-temperature environment, that is,-160℃ or lower). In addition, if superconductors need to produce strong diamagnetism, the external magnetic field must be strong enough, but the magnetic field of geomagnetic mines alone is far from enough. From this point of view, if we really want to realize trackless maglev, we must use other power methods to assist.
Brief introduction of maglev train
Did Volkswagen really build a maglev car? I think the host Le Jia has answered this question for the reporters. I think this short film is&; Ldquo was designed by a girl in China and used by the public in China. Event promotion video. Through this activity, Volkswagen collected a wide range of car design ideas, and then made them into models for display, among which the magnetic levitation vehicle was the most dazzling one in this activity. The design of Le Jia, the representative figure, is very novel, and it is very likely to be made in the future.
The above is a brief introduction of the maglev train made by Bian Xiao Automobile. For the introduction of maglev vehicles, Bian Xiao Automobile briefly introduced his three aspects for friends, namely, the technology of maglev vehicles, the problems encountered now and the future prospect. Through the above brief introduction, we can see that there are still many problems in maglev train, but we believe that this technology will be realized one day!
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