Recently, China’s first subway line with permanent magnet traction system, Changsha Subway Line 5, has officially carried passengers, marking the ushering in the era of permanent magnets for China’s subways. The SmCo permanent magnetic material used in this permanent magnetic traction system was developed by ZGDK Magnetic Materials Technology Group.
The high-performance rare-earth samarium-cobalt permanent magnet material used in the permanent magnet traction system has the characteristics of high temperature resistance, high magnetic performance, small size, and stable inertial conductivity. It can also guarantee extremely strong in the high temperature range of minus 250 degrees Celsius to 350 degrees Celsius The magnetic properties ensure that the permanent magnet traction system will not operate normally due to the loss of magnetism.
"A strong man can't pull away permanent magnets that are about the size of a chess piece, and they are completely adsorbed together." ZGDK related technical experts said that the permanent magnets made of permanent magnet materials are small but contain huge energy. A cylindrical permanent magnet with a diameter of 3.6 centimeters and a height of about 3.2 centimeters is attached to the ends of the steel wire rope, and is hung on the rear of one car and the volume and weight of the other car are larger than the head of the car in front. With the help of permanent magnet pulling force, the rear car will be dragged successfully.
"Not only rail transit, SmCo permanent magnet materials are also used in aerospace, communications, radar, navigation and other fields." ZGDK related technical experts said that with this permanent magnet traction system application as an opportunity, ZGDK will continue to increase rare earth Research efforts on permanent magnet materials, strengthen the promotion of rare earth permanent magnet materials in new energy vehicles, wind power and other fields in the future, bringing more changes to people's travel and life.