Research on Electromagnetic Characteristics of Linear Synchronous Motor of Superconducting High-Speed Maglev Train

Taking the Japanese superconducting high-speed maglev train as the research object, a finite element model of the superconducting linear synchronous motor is established, the armature magnetic field characteristics of the superconducting linear synchronous motor under different air gap conditions are analyzed, and the variation law of the electromagnetic force in different directions of the superconducting linear synchronous motor with the amplitude of the armature current and the electric angle is studied. Simultaneously, by establishing a mathematical model, the characteristics of mutual inductance change between the superconducting magnet and track coil with the change in train position, the relationship between the vertical and lateral forces, the power angle of the linear synchronous motor, and the pulsation law of the lateral and vertical forces are analyzed. The results showed that the armature magnetic field density gradually converged to a sinusoidal wave with an increase in the air gap, and the vertical and lateral forces generated by the superconducting linear motor significantly influenced the operational stability of the magnetic levitation train.