磁悬浮列车牵引系统.ppt

* * * * * * * * * * * * * * * * * * * * Classification Field location Long Primary Short Primary Magnetic field Permanent Magnet Electromagnet with iron-core Superconducting magnet with air-core * Braking Method Swap the poles of electromagnet Swap the phase sequence of primary wire loops Strategy Decrease the number of railway stations Regenerative braking and eddy current braking as primary braking Oil braking as secondary braking * Hybrid braking Above a certain speed (usually 5~20 km/h) Regenerative braking Eddy current braking Below a certain speed Oil braking High-friction skids (backup) * Energy Collection On-board batteries: insufficient Electric power supply from ground side to support Levitation Propulsion On-board electrical equipment Battery recharging * Classification Low-medium speed operation Mechanical contact such as a pantograph SP type maglev used in this situation High speed operation Linear generator * Linear generator * Energy infrastructure Transformer Rectifier Filter Inverter Load Transformer * Content Overview of Maglev Fundamentals Traction system and subsystems Shanghai Maglev Overview Shanghai maglev Transit type Magnetic levitation Began operation January 1, 2004 Number of lines 1 Number of stations 2 Length 30.5 km Max operational speed 431 km/h Technology Shanghai maglev Levitation EMS Propulsion LP-LSM Guidance Magnetic repulsive force Air gap About 10 mm Primary braking Track eddy current brake ( 5 km/h) Secondary braking Regenerating brake ( 5 km/h) Oil brake ( 5 km/h) High-friction skids Electric power supply Comparison HSST (Japan) MLU (Japan) Levitation EMS EDS Propulsion SP-LIM LP-LSM Air gap 8~12 mm 80 ~ 150 mm Max speed 100 km/h 581 km/h Guidance Integrated Integrated Service Low-medium speed, short distance High speed, long distance End * * * * * * * * * * * * * * * * * * * 磁悬浮列车牵引系统 Maglev Traction System * Content Overview of Maglev Fundamentals Traction system and subsystems Shanghai Maglev * Backgroun