Design Scheme Description of Rail Rare Earth Permanent Magnet Electric Suspension Train
General 1. Design Overview
This scheme proposes a new type of elevated rail transit system-air rail rare earth permanent magnet electric suspension train. The system uses elevated track structure, combined with rare earth permanent magnet materials and electric suspension (EDS) technology to realize the non-contact operation of the train. The system has the characteristics of high efficiency, safety and strong environmental adaptability, does not occupy the ground right of way, and is suitable for urban fast commuting, intercity communication and potential ultra-high speed transportation scenarios in the future.
Composition and working principle of 2. system
Suspension and guidance system
The principle of electric suspension (EDS) is adopted: the vehicle-mounted strong magnet (rare earth permanent magnet array) and the conductor plate (non-closed coil array) on both sides and at the bottom of the track move relative to each other, and eddy current is induced in the conductor plate, which in turn generates repulsive force to realize suspension and guidance. The system is passive, and the suspension force increases with the increase of speed, without active control.
The critical speed of suspension generally needs to reach 80-120 km/h, and it is supported by the adjustable auxiliary running wheel at low speed or at rest. The guidance is self-stabilized by the track-U-shaped structure and lateral electromagnetic force.
Traction system
The long stator linear synchronous motor is used as an independent traction system, the stator winding is laid continuously along the track, and the train driving and braking are realized by controlling the traveling magnetic field. The traction and suspension systems are independent of each other, improving control flexibility and reliability.
Track structure
The track is an elevated U-shaped or inverted T-shaped steel structure, taking into account the load-bearing, guiding and electromagnetic interface functions. The whole line is equipped with redundant power supply and signal system, and has fail-safe guidance: the auxiliary wheel automatically lands when the suspension is unstable, ensuring safe parking.
3. core technical features
Large gap passive suspension: the suspension gap can reach 10-20mm (based on the magnet performance and speed optimization), which is higher than the traditional electromagnetic suspension system, with strong adaptability and easy maintenance.
High speed and high efficiency: the design speed is 200-600 km/h under normal pressure, the aerodynamic resistance is small, and the energy consumption is low. With the expansion ability of compatible low vacuum pipelines in the future, it can further break through the speed limit.
Three-dimensional right of way and strong adaptability: The elevated track makes full use of the three-dimensional space, avoids conflicts with ground traffic, and adapts to complex terrain and climatic conditions.
Low noise and environment-friendly: no mechanical friction, low operating noise; pure electric drive, zero direct emissions.
Prospect of 4. Application Scenarios
Urban and intercity express lines: normal pressure operation, as the backbone of large-capacity public transportation.
Ultra-high-speed transportation corridor: low-vacuum pipelines are used in some sections to reduce air resistance and realize ultra-high-speed passenger and cargo transportation at a speed of 1000 km/h.