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Magnetically Levitated Train

Source:http://www.flychinatravel.com Clicks:Date:2019-11-09 13:23





Maglev train is a kind of modern high-tech rail transit tool. It realizes the non-contact suspension and guidance between the train and the track through the electromagnetic force, and then uses the electromagnetic force generated by the linear motor to drive the train.
In 1922, Hermann Kemper, a German engineer, put forward the principle of electromagnetic suspension, and then applied for a patent. Since the 1970s, with the economic strength of industrialized countries increasing, in order to improve the transportation capacity to meet the needs of their economic development and people's livelihood, Germany, Japan, the United States and other countries have carried out research and development of maglev transportation system.
China: 1) China's first maglev train (bought from Germany) began to operate on the Shanghai maglev line in January 2003. In October 2015, Changsha maglev line, China's first domestic maglev line, was successfully put into trial operation 2) on May 6, 2016, Changsha maglev express line, China's first medium and low speed maglev commercial operation demonstration line with full independent intellectual property rights, was put into trial operation. The line is also the longest medium and low speed maglev operation line in the world In June 2018, the first commercial maglev 2.0 train in China was offline in CRRC Zhuzhou Electric Locomotive Co., Ltd.
Chinese name maglev train foreign name maglev train inventor Herman Kemper has the highest speed of 603 km / h (April 2015, Japan) and the earliest self operated l0 maglev train with the highest speed on the East hilly line of Japan
Development status
The countries that have studied maglev in the world are mainly Germany, Japan, Britain, Canada, the United States, the former Soviet Union and China. The United States and the former Soviet Union abandoned their research programs in the 1970s and 1980s, respectively, but the United States recently began to do so.  Britain began to study maglev in 1973, but it is one of the first countries to put maglev into commercial operation.
In April 1984, the 600m long maglev transportation system between Birmingham Airport and the railway station was officially put into operation. It only takes 90 seconds for passengers to take the maglev train from the airport to the railway station. But in 1995, after 11 years of operation, it was stopped. At present, Germany and Japan are the most mature countries in the study of maglev.
Germany began to study the maglev in 1968. At the beginning, the constant conduction type and the superconducting type were both emphasized. In 1977, the constant conduction type and the superconducting type test trains were developed respectively. However, after analysis and comparison, it was decided to concentrate on the development of the constant guide maglev train. At present, Germany's technology in the research of the permanent magnet train is mature.
Since 1962, Japan began to study the constant conduction maglev train. Later, due to the development of superconducting technology, Japan began to study the superconducting maglev train from the 1970s. In December 1972, on the test line of Miyazaki maglev railway, the speed reached 204 km / h. In December 1979, it was further increased to 517 km / h. In November 1982, the manned test of maglev train was successful. In 1995, the test speed of the maglev train was 411km / h. In December 1997, the world's highest speed of 550km / h was set on the test line in Shanli county. The highest speed is related to the length of the test line. Both ends of the test line in Germany are circular, and the straight part is only about 7km. The test line in Japan is straight and very long, so it can reach a higher speed.
In the early 1980s, China began to study the low-speed and constant guide maglev. In October 1994, Southwest Jiaotong University built the first test line of maglev railway, and carried out the manned test of maglev train at the same time. It successfully carried out the test of maglev train with four seats, dead weight of 4T, suspension height of 8mm and speed of 30km / h. in January 1996, it passed the expert appraisal organized by the Ministry of railways. Then, on the indoor magnetic levitation test line with track gauge of 2m, length of 36m and design speed of 100km / h, the low-speed constant conduction 6T single bogie magnetic levitation test vehicle with length of 6.5m, width of 3M, self weight of 4T, 15 seats and design speed of 100km / h was successfully tested. In November 1998, it passed the appraisal of scientific and technological achievements of the Ministry of Railways and filled in the technical lead of magnetic levitation train in China Space for the domain.
In 2016, the 100 km / h Changsha maglev express train led by CRRC Zhuzhou Locomotive Co., Ltd. was put into operation, which is known as China commercial maglev 1.0 train in the industry. The commercial maglev 1.0 train is suitable for urban area.
In June 2018, the first commercial maglev 2.0 train in China was offline in CRRC Zhuzhou Electric Locomotive Co., Ltd. The design speed of the train in version 2.0 has been increased to 160km / h, and three car formation has been adopted, with a maximum capacity of 500 passengers. In addition, the vehicle traction power is increased by 30%, and the suspension capacity is increased by 6 tons. Commercial maglev version 2.0 is applicable to the traffic between the central city and satellite city.
At 10:50 on May 23, 2019, China's 600 km / h high-speed maglev test sample vehicle was offline in Qingdao. This marks a major breakthrough in the field of high-speed maglev technology in China.
system composition
The maglev train is mainly composed of three parts: suspension system, propulsion system and guidance system. Although it is possible to use a propulsion system independent of magnetic force, in most current designs, the functions of these three parts are performed by magnetic force.

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