On March 31, 2023, the first domestic high-temperature superconducting electric levitation full-element test system independently developed by CRRC completed its first levitation operation at CRRC Changke Co., Ltd. in Changchun, marking China's high-temperature superconducting electric levitation. An important technological breakthrough in the field!

High-temperature superconducting electric levitation technology has made progress

The levitation operation has fully verified the key core technologies of the superconducting electric maglev transportation system, such as superconducting magnets, linear synchronous traction, induction power supply and low-temperature refrigeration, and laid a solid foundation for promoting the engineering application of superconducting electric maglev transportation systems. Some academicians and experts in the industry witnessed the suspension operation test.

The high-temperature superconducting material can be transformed into a superconducting state at a liquid nitrogen temperature above 77K/-196°C, and the DC resistivity drops to zero. When the current flows through the superconducting material, no heat loss occurs, and it can carry a larger current, thereby producing a superconducting state. strong magnetic field. Based on this principle, superconducting electric maglev relies on the interaction between the superconducting magnet on the vehicle and the 8-shaped suspension coil on the ground to achieve self-suspension, self-guiding, and self-stabilization. One of the commanding heights of technology.

The superconducting electric maglev transportation system is composed of vehicles, tracks, traction power supply, operation communication and other systems. The high-temperature superconducting electric suspension system exhibited this time has the advantages of high speed, safety, greenness, intelligence, comfort and strong environmental adaptability:It is suitable for application scenarios such as high-speed, ultra-high-speed and low-vacuum pipelines, and the application speed can reach 600km/h and above; it adopts passive suspension mode, no active control is required, the system is simple, and the reliability is high; the suspension and guide gap are large, and it is adaptable to the line Strong capacity and large space for speed-up; the vehicle is equipped with a running device, which has strong emergency operation capability and high safety.

In 2019, the Central Committee of the Communist Party of China and the State Council issued the "Outline for Building a Powerful Transportation Country", which clearly proposed a reasonable overall arrangement for the research and development of technical reserves for high-speed maglev systems with a speed of 600 kilometers per hour. The superconducting electric maglev transportation system is an important choice for my country to build fast transportation channels between megacities and developed economic circles in the future. It also provides important support for optimizing the spatial layout of the country, promoting coordinated regional development, and building a comprehensive three-dimensional transportation network in my country. Editor/He Yuting