Analysis of Electromagnetic Drag Forces between HTS Magnets and Steel Rebars for Hyperloop

초록

Maglevs are typically accelerated using electromagnetic propulsion and levitation. High-temperature superconducting (HTS) magnets with electrodynamic suspension (EDS) and linear synchronous motors are one of the best options for Hyperloop. However, the strong magnetic fields generated by HTS magnets on the pods inevitably interact with the magnetic and conductive structures in the vacuum tubes, along with the tube itself, while the pods move through the tubes. This interaction is observed as a drag force on the pods, significantly reducing the propulsion efficiency. This study analyzes the electromagnetic drag force (EDF) between HTS magnets and steel rebars in concrete guideways. Theoretical analysis and 3D FEA simulations are performed to analyze the EDF between HTS magnets and steel rebars. The EDF generated by AISI 1010 steel rebars in concrete guideways is even greater than the designed propulsion forces of 40 kN. In order to solve this problem, high-manganese (Hi-Mn) steel and insulated steel rebars are adopted and analyzed using 3D FEA simulations.