magnetic levitation train, but you may not have heard of magnetic levitation car . The good news is that our country has once again taken the lead in this technology.
So as the name suggests, magnetic levitation technology refers to a technology that uses magnetic force to overcome gravity to levitate an object.
. Magnetic levitation trains are transportation tools composed of contactless magnetic support, magnetic guidance and linear drive systems. They mainly include superconducting electric magnetic levitation trains, often conductive electromagnetic suction high-speed magnetic levitation trains, and often conductive electromagnetic suction medium and low-speed magnetic levitation.
my country began to study magnetic levitation trains in the 1980s. In March 1989, the National University of Defense Technology developed China's first magnetic levitation test prototype.
In October 11994, a research team led by Professor Three of the Company successfully developed my country's first maglev car that can carry 4 tons of manned maglev car and its test line, and achieved stable suspension and operation of the system. This is my country's first breakthrough in the field of maglev train , marking that my country has begun to have independent intellectual property rights maglev train technology.
1995, China's first magnetic levitation train test line was built in Southwest Jiaotong University , and successfully conducted tests with a speed of 30.0 km per hour, such as stable suspension, guidance, drive control and manned operation, marking that my country has mastered the technology of manufacturing magnetic levitation trains.
Every time I go to Shanghai for a business trip, I take the Shanghai maglev train.
It was actually launched in January 2001. On December 31, 2002, the Shanghai maglev train demonstration operation line held a opening ceremony. On October 11, 2003, it started to operate. On January 29, 2004, the entire day of external trial operation began. On April 27, 2006, the Shanghai maglev train demonstration operation line was officially put into commercial operation.
With the development of time, my country is also constantly improving in the field of magnetic levitation trains. In June 2020, the high-speed magnetic levitation test prototype was successfully tested. In September this year, at the 2022 International Rail Transit Technology Exhibition in Berlin, Germany, China CRRC released the fastest land public transportation tool in the world currently available - a high-speed maglev transportation system at 600 kilometers per hour.
In fact, many people don’t know that in 2021, my country’s maglev high-speed speed test line has begun to be built.
In short, my country has ranked among the world's advanced level in the magnetic levitation train.
Speaking of magnetic levitation cars, although many developed countries in Europe and the United States have proposed corresponding concepts early on, very few of them are actually done, but we have implemented these concepts one by one.
Last month, my country conducted a magnetic levitation vehicle experiment. On the Jiangsu Gaoxuan Expressway, not only did the experiment be successful, but the speed of 200 kilometers per hour was also achieved. The total length of the test road is 7.9 kilometers, and the sections cover multi-level speed limit sections such as 140, 160, 200 kilometers per hour. The maximum speed of the actual vehicle was even close to 230 kilometers per hour.
You should know that the speed limit of highways in my country is 120 kilometers, which also shows that this magnetic levitation car has practical application value and is not a complete laboratory product.
, and a total of 8 vehicles participated in the test. Not only one test vehicle, including 5 new energy vehicles and 3 fuel vehicles, 8 drivers of different ages and genders were recruited from social channels.
At the same time, this is also the first time in China that it has successfully achieved the test target of 2.8 tons of suspension weight and 35 mm of suspension gap.
Magnetic levitation cars have two technical routes, linear maglev car technology and rotary maglev car technology. Professor Deng Zigang
Project Sub-director and researcher at Southwest Jiaotong University Professor Deng Zigang said that linear maglev cars are transformed and upgraded based on the original structure of traditional cars, and installed permanent magnet arrays for suspension guidance, and correspondingly laid good conductor tracks on the ground. The vehicle-mounted permanent magnet array and ground conductor plate track form a vehicle-road coupling system, thereby establishing a magnetic-force coupling relationship .
After more than three years of accumulation of theoretical, simulation and experimental experience, line test research was carried out on the basis of completing the transformation, installation and track laying of the 1:1 prototype vehicle.
rotary maglev car technology is an upgrade and innovation based on the linear maglev car, and transforms the original linear magnetic resistance "turn waste into treasure" into driving force. The magnetic resistance drive is similar to the principle of traditional cars relied on friction acceleration. This clever transformation makes the maglev car suspension drive integrated. Up to now, the design and development of the 1:50 scale prototype car has been completed and the control and testing system is being carried out from the laboratory to line testing. The next step will focus on the 1:1 real car research and development to help realize the beautiful vision of the first maglev car to "float and run".
In short, this test project proposes linear maglev car and rotary maglev car technology, and develops integrated control systems for suspension, drive and guidance, and conducts actual vehicle transformation and testing experiments. This move will provide important support for the research and development of maglev cars in my country.
In addition, it has to be mentioned that the height section of this experiment is also not ordinary. It is a scientific research test section of a new infrastructure and a new type of transportation equipment. It mainly focuses on the line shape indicators of highways at 200 kilometers per hour, new maglev transportation vehicles, vehicle-road coupling systems, mixed traffic organization and collaborative control technology, etc. It aims at the actual vehicle test of 200 kilometers per hour, and uses digital means to achieve accurate perception, precise control and precise services of highways under the 200 kilometers per hour scenario. In the future, there will be more high-speed transportation tools to be tested and verified here for a long time.
Of course, magnetic levitation cars also have their shortcomings. For example, because they are suspended in the air, their stability is slightly poor and they will often shake left and right. This is a very bad experience and requires continuous technical means to solve this problem. But no matter what, magnetic levitation technology has huge advantages, such as emissions-free, low maintenance costs, etc. Even if it cannot be used for large-scale transportation for a long time, it can still play a huge role in some scenarios. Only by establishing a first-mover advantage can we take the lead in the future competition for magnetic levitation technology.
