The world's first rare earth permanent magnet maglev rail transit project test line was completed
Time:03/03/2023
The suspended permanent magnetic levitation rail transit system, referred to as "red rail", is the first permanent magnetic levitation rail transit test line built in the world so far. China has a new type of rail transit with completely independent intellectual property rights, which has been successfully tested in Ganzhou, Jiangxi Province. Using rare earth materials to make permanent magnets, Jiangxi has a unique advantage, with an annual output of 70% of the world's medium and heavy rare earth. The train does not rely on wheels to run, and the friction force is greatly reduced. It only needs motor drive to run. Long Zhiqiang, a professor at the University of National Defense Science and Technology, told the reporter that the permanent magnet maglev train is suspended in the air by virtue of the repulsion force with the permanent magnet track against the permanent magnet device on the roof - its principle is that the magnetic field generated by the track is in the opposite direction to the magnetic field of the permanent magnet on the train, so the repulsion force is generated. When the upward support force is balanced with the vehicle gravity, the permanent magnet of the permanent magnet maglev train repels the track and remains suspended at the center line of the slot, The train will float in the air.
It is worth noting that compared with the conventional conventional and superconducting maglev trains, the permanent magnet maglev train can achieve zero power levitation without additional current excitation. In addition, compared with suspension systems such as subway and intercity railway, its cost advantage is obvious. The cost of the rare earth permanent magnet maglev train is only about 1/2 of that of the light rail, and the construction cost per kilometer is less than 100 million yuan, which is 1/3 of the cost of the current medium and high speed maglev transportation system. After large-scale application, the cost will be further reduced. Its future application potential and technology industrialization scale should not be underestimated.
