The prototype of the world‘s first high-temperature superconducting high-speed maglev train project with a speed of over 600 kilometers per hour, which is independently developed, designed and manufactured by China, was unveiled in Chengdu, Sichuan on Wednesday (13th). The Southwest Jiaotong University expert in charge of the R&D project pointed out that this technology is the world‘s first, with a speed of 600 kilometers per hour. It is more energy-efficient than the current Japanese Shinkansen in the United States, but it has many advantages such as more energy saving; and the train will be used in vacuum tube tunnels in the future. Up to 1000 kilometers, faster than some civil aviation aircraft.
Sichuan new media “Red Star News” reported that the Jiulidi campus of Southwest Jiaotong University in Chengdu held the “world‘s first high-temperature superconducting high-speed maglev engineering prototype vehicle and opening ceremony of the test line” on Wednesday (13th).
Traditional foreign magnetic levitation technology, Maglev (full name Magnetic levitation) in English, mainly relies on magnetic attraction and repulsion to generate power. The “High-temperature superconductivity (High Tc)” high-speed maglev, which was exposed by the R&D team of Sichuan Southwest Jiaotong University, is another temporary new technology.
“HTS” high-speed maglev is the prototype of a vacuum tube train
Deng Zigang, a member of the R&D team of Southwest Jiaotong University, pointed out that “high temperature superconductivity” does not really refer to high temperature. In short, its principle is in contrast to “low temperature superconductivity”. The actual temperature is at the operating temperature of liquid nitrogen-minus 196 degrees Celsius. The resistance disappears completely; at this time, the train does not need additional control or power supply, it relies on its own normally conductive material to interact with the permanent magnet track to achieve stable suspension.
The Southwest Jiaotong University demonstrated on Wednesday is a prototype of the “High Temperature Superconducting” high-speed maglev train project. It uses an all-carbon fiber lightweight body, a low-resistance head, and its design speed is 620 kilometers per hour.
As for the experimental section of the high-temperature superconducting high-speed maglev train, the total length is 165 meters and the construction area is about 1,250 square meters. The main contents of the project include: suspension system, traction braking system, transportation control system, offline civil engineering and auxiliary engineering construction, as well as joint debugging and joint testing of the entire system engineering and comprehensive performance testing system.
Single “HTS” high-speed maglev speed of 620 kilometers per hour
It is worth noting that the engineering prototype and experimental section displayed by Southwest Jiaotong University on Wednesday is actually the prototype of China‘s “vacuum tube” high-speed rail, and the “vacuum tube” high-speed rail project will be introduced in the future.
Deng Zigang pointed out that China’s super high-speed rail has two concepts, one is called magnetic levitation, and the other is called vacuum pipeline. The “high-temperature superconducting” high-speed magnetic levitation is now displayed. The next step will be to combine it with vacuum pipelines; such as operating in vacuum pipelines. , The train can further increase the speed, it is expected to reach a speed of 600+ or even 1000 kilometers per hour.
At present, the maximum operating speed of most civil aircraft is more than 900 kilometers per hour, and some are more than 1,000 kilometers per hour; that is, once the above-mentioned technology has achieved results, the speed of vacuum tube trains on the ground can be faster than that of most civil aircraft.
However, China has a long way to develop this technology in the future. Deng Zigang mentioned that the current test line is only 165 meters due to the limitation of the site. “The test line is very critical. It can help the vehicle move from the laboratory to the engineering application, to verify and study some key technologies and key issues. All the functions and components of the test vehicle are consistent with future practical applications. The next step may be to find To achieve a certain place, it may be necessary to build a test line of 30 to 50 kilometers to achieve a higher speed test.”
For example, the speed of the vacuum tube train reaches 1,000 kilometers per hour
In terms of vehicle cost, Deng Zigang said that because there is no large-area application yet, its cost may be higher than the existing high-speed rail cost, but its operating cost is relatively lower, because there are no contact parts, so basically it can It is called “maintenance free”.
As for the benefits of “HTS” high-speed maglev and vacuum tube trains in the future, the R&D institutions enumerate the following:
- The first is energy saving: suspension and guidance do not require active control or vehicle power supply, and the system is relatively simple. Suspension and guidance only need to be cooled with cheap liquid nitrogen (77K), 78% of the air is nitrogen.
- The second is environmental protection: the high-temperature superconducting magnetic levitation can be suspended statically, completely without noise; the permanent magnet track generates a static magnetic field, and the magnetic field in the place where the passengers touch is zero, and there is no electromagnetic pollution.
- The third is safety: the levitation force increases exponentially with the decrease of the levitation height, and the safe operation can be ensured without control in the vertical direction. The self-stabilizing guidance system can also ensure safe operation in the horizontal direction.
- The fourth is comfort: the special “pinning force” of the high-temperature superconductor keeps the car body stable up and down, which is a stability that is difficult for any vehicle to achieve.
- Fifth, the operating cost is low: Compared with the German constant-conductivity magnetic levitation vehicle and the Japanese low-temperature superconducting magnetic levitation vehicle using liquid helium, it has the advantages of light weight, simple structure, and low manufacturing and operating costs.
Editor in charge: Deng Guoqiang