The contents of the online theme team course "Red Scarf Love Learning" in the sixth season, the 23rd issue, are as follows:
The train flying close to the ground refers to the HTS high-speed maglev train. Baby, an experimental train born in Southwest Jiaotong University, has a design speed of 62 kilometers per hour. Maglev train is a kind of train driven by magnetic levitation force, which realizes non-contact suspension and guidance between the train and the track through electromagnetic force, and then draws the train by electromagnetic force generated by linear motor.
because of the magnetic force of its track, it is suspended in the air, which reduces the friction. Unlike other trains, it needs to touch the ground when walking, and only suffers from the resistance from the air. The speed of high-speed maglev trains can reach more than 4 kilometers per hour, while most of the medium and low-speed maglev trains are 1-2 kilometers per hour.
In p>1922, German engineer Hermann Compel put forward the principle of electromagnetic levitation, and then applied for a patent. Since the 197s, with the economic strength of industrialized countries increasing, Germany, Japan, the United States and other countries have successively carried out research and development of magnetic levitation transportation systems in order to improve their transportation capacity to meet the needs of their economic development and people's livelihood.
on December 14th, 221, Xingguo, the first maglev empty rail vehicle in China, rolled off the assembly line in Wuhan. On September 2, 222, local time, CRRC released a high-speed maglev transportation system with a speed of 6 kilometers per hour to the world.
Advantages of Maglev Train
1. Fast speed: Maglev Train is the only ground passenger transport vehicle that can operate at a speed of 5 kilometers per hour. For inter-city travel with a distance of 5 kilometers to more than 1, kilometers, Maglev Train can completely compete with airplanes in travel time and travel quality.
2. Low relative energy consumption: At the speed of 5 kilometers per hour, the energy consumption per seat kilometer of maglev train is only 1/3 to 1/2 of that of airplane and 3% less than that of automobile.
3. Low noise: Because there is no friction between wheels and rails, the noise of maglev train is lower than that of traditional railway at the same speed.
4. Pollution-free: Because the maglev train is powered by electricity, its development is not limited by the energy structure, especially the fuel supply; At the same time, it will not emit waste gas along the track, which is a veritable green means of transportation.