Coil type permanent magnet electric levitation driving device for maglev train

Abstract

The invention relates to the technical field of maglev trains, in particular to a coil type permanent magnet electric levitation driving device for a maglev train. The permanent magnet of the Halbacharray replaces an original superconducting magnet to serve as a vehicle-mounted magnet and interacts with the zero-flux coil to achieve suspension and guide integration. The center of the first Halbach array magnet deviates downwards from the center of the zero-flux coil, so that the upper magnetic flux and the lower magnetic flux are different, the upper portion of the coil is opposite to the vehicle-mounted magnetic pole, the lower portion of the coil is the same as the vehicle-mounted magnetic pole, and therefore an upward suspension force is generated. Permanent magnets of a second Halbacharray are arranged at the bottom of the vehicle body, a long stator synchronous linear motor is adopted on the ground for propulsion, and stable propulsion is achieved. The single side of the permanent magnet adopting the Halbach array can reach a relatively large magnetic field, and the permanent magnet adopting the Halbach array replaces an original superconducting magnet to serve as a vehicle-mounted magnet without cooling under the requirement of the required magnetic field intensity, so that a complex cooling system and an auxiliary system are omitted, the cost is greatly reduced, and the structure is simplified.

Description

technical field [0001] The invention relates to the technical field of maglev trains, in particular to a coil type permanent magnet electric suspension driving device for maglev trains. Background technique [0002] The maglev train uses the principle of "same sex repels and opposite sex attracts" to make magnets have the ability to resist gravity, so that the car body completely detaches from the track and floats on the track to fly in the air. Most of the existing vehicle-mounted magnets use ultra-fine niobium-titanium (NbTi) alloy multi-core wires embedded in copper busbars to make superconducting wires, which are cooled to -269°C with liquid helium to form superconducting magnets. When the maglev train is moving, the moving magnetic field generated by the on-board magnet generates an induced current in the suspension coil installed on the line, and the two interact to provide suspension force and guidance force for the train, and provide traction force for the train thro...

AI Technical Summary

Problems solved by technology

[0003] There are many problems in the existing maglev trains: for example, the distance from Shinagawa to Nagoya is 286 kilometers, the budget is about 320 billion yuan, and the average price is about 1.1 billion yuan / km.

Japan's low-temperature superconducting scheme uses liquid helium to cool the superconducting coil, which involves a complex cooling system, high cost, and a lot of refrigeration equipment.

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