关键词: 高速磁浮列车, 长定子直线同步电机, 气隙变化, 悬浮力, 牵引力

Abstract: Due to special separated structure of long-stator linear synchronous motor in high-speed nomal conditioning maglev train, its air gap is decided by levitation and guidance systems which causes the traction force and levitation force easily influenced by performances of levitation and guidance system. The influence on air gap of three working conditions including position drop of one long stator section, longitudinal inclination of levitation magnet module and transverse
position offset were inveetigated. Based on FEM, the 2D and 3D models were erected, and the traction force and levitation force were calculated and analyzed. The influence rule on forces of air gap variation was deduced. The analysis results could provide references to the design and control of the traction system in the high-speed maglev train.

Key words: high-speed maglev train, long-stator linear synchronous motor, air gap variation, traction force, levitation force