Magnetic Shielding Design for the Carriage Structure of Superconducting EDS Transport System

Superconducting Electrodynamic Suspension (EDS) technology is characterized by a large suspension gap and superior suspension and guidance capabilities, making it one of the main technological paths for achieving higher-speed rail transit. The Superconducting Magnets (SCM) onboard are crucial for the levitation, guidance, and propulsion of the train. However, during operation, SCM can emit a stray magnetic field into the carriage interior, which can reach up to 30 mT. This emission has the potential to compromise passenger safety. An EDS magnetic shielding structure needs to be designed. In this study, based on the material B-H characteristics and the actual vehicle structure, a three-dimensional electromagnetic simulation model was established to solve the magnetic shielding problem of the Carriages. The article discusses the impact of the thickness, height, and length of shielding slabs on shielding effectiveness for the carriage structure. The research revealed that thickness significantly impacts shielding effectiveness. Shielding slabs that are 12 mm thick can maintain a safe level of magnetic field inside the carriage. However, beyond a certain thickness, increasing the thickness of shielding slabs beyond a certain point does not significantly enhance the shielding effect. The height of 1600 mm and the length of 1700 mm shielding structure can considerably reduce the amount of magnetic shielding material required, while only slightly reducing the shielding effect. This discovery is crucial for optimizing the concrete shielding structures for the practical superconducting EDS trains.