1922, German engineer Herman Qiang put forward the principle of electromagnetic levitation, and then applied for a patent. After 1970s, with the strengthening of the economic strength of industrialized countries, the transportation capacity was improved to meet the needs of their economic development and people's life.
The first maglev train in China started running on the Shanghai maglev line in June 2003. On May 6th, 20 16, Changsha Maglev Express Line, the first demonstration line of medium and low speed maglev commercial operation in China with completely independent intellectual property rights, was put into trial operation, which is the longest medium and low speed maglev operation line in the world.
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Due to the characteristics of high cost, high power consumption, large radiation and unreliability, the prospect of maglev train is not ideal. The normal guided maglev train can reach 400 to 500 km/h, and the superconducting maglev train can reach 500 to 600 km/h.
Its high speed makes it superior to flying in the travel distance between 1000 and 1500 kilometers. Because there are no wheels and no friction, it consumes 30% more power than the most advanced high-speed rail at present.
Because there is no wheel-rail contact, the vibration is large and the comfort is not good, but heavy bumps also require extremely high maintenance costs for vehicles and rails. The maglev train will not rub against the track when it is running, so the noise is very low.
References:
Baidu encyclopedia-maglev train