Levitation, propulsion and guidance integrated magnetic levitation system and improvement method of guidance and levitation

Patent metadata

Field	Value
Publication number	US-11834078-B2
Application number	US-202117539409-A
Country	US
Kind code	B2
Filing date	Dec 1, 2021
Priority date	Jul 7, 2021
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A levitation, propulsion and guidance integrated magnetic levitation system and an improvement method of levitation and guidance. The system includes a maglev train and a maglev track. The maglev train is provided with a permanent magnet array. The maglev track is provided with a driving device and a levitation driving device in sequence along a running direction of the maglev train. An iron plate is arranged in the middle of the maglev track. The driving device accelerates the maglev train from 0 to take-off velocity. The levitation driving device provides a driving force and a levitation force for the maglev train. The iron plate enables the centered running of the maglev train.

First claim

What is claimed is:

1. A levitation, propulsion and guidance integrated magnetic levitation system, comprising:
a maglev train; and
a maglev track;
wherein the maglev track is provided with a driving device and a levitation driving device in sequence along a running direction of the maglev train;
the driving device is only configured to provide a first driving force for acceleration of the maglev train at a start-up stage; and
the levitation driving device is configured to provide a second driving force and a levitation force for the maglev train after the maglev train is accelerated by the driving device; and
the levitation driving device comprises a plurality of alternating coils uniformly arranged along an extending direction of the maglev track; each of the plurality of alternating coils is embedded with an induction levitation plate; and an isolating ring is arranged between the induction levitation plate and each of the plurality of alternating coils for complete insulation isolation.

2. The levitation, propulsion and guidance integrated magnetic levitation system of claim 1 , wherein the driving device comprises a plurality of alternating coils uniformly arranged along an extending direction of the maglev track; and the plurality of alternating coils are connected to an external power supply device via a power interface.

3. The levitation, propulsion and guidance integrated magnetic levitation system of claim 1 , wherein the induction levitation plate is made of a metal material with a relative magnetic permeability equal to or larger than 1 and an electrical resistivity greater than 3*107 S/m.

4. The levitation, propulsion and guidance integrated magnetic levitation system of claim 3 , wherein the induction levitation plate is an aluminum plate, a copper plate or a silver plate.

5. The levitation, propulsion and guidance integrated magnetic levitation system of claim 1 , wherein a middle portion of the induction levitation plate is embedded with a guidance magnetic strip; the guidance magnetic strip is parallel to the running direction of the maglev train; and the guidance magnetic strip is made of a metal strip with a relative magnetic permeability greater than 800.

6. The levitation, propulsion and guidance integrated magnetic levitation system of claim 5 , wherein the guidance magnetic strip is an iron strip.

7. The levitation, propulsion and guidance integrated magnetic levitation system of claim 5 , wherein the induction levitation plate is further embedded with a plurality of copper sheets arranged in parallel; and the plurality of copper sheets are symmetrically arranged on two sides of the guidance magnetic strip and are perpendicular to the guidance magnetic strip.

8. The levitation, propulsion and guidance integrated magnetic levitation system of claim 6 , wherein the induction levitation plate is further embedded with a plurality of copper sheets arranged in parallel; and the plurality of copper sheets are symmetrically arranged on two sides of the guidance magnetic strip and are perpendicular to the guidance magnetic strip.

9. The levitation, propulsion and guidance integrated magnetic levitation system of claim 1 , wherein an auxiliary wheel is rotatably connected to a bottom of the maglev train through a rotating shaft; and the auxiliary wheel is spherical.

10. A levitation driving method based on the levitation, propulsion and guidance integrated magnetic levitation system of claim 1 , comprising:
(S1) parking the maglev train on the maglev track provided with the driving device; and accelerating the maglev train by the driving device to ensure that when the maglev train arrives at a section of the maglev track where the levitation driving device is provided, a running speed of the maglev train is not less than a take-off velocity of levitation; and
(S2) allowing the maglev train to enter the section of the maglev track where the levitation driving device is provided at a speed higher than the take-off velocity of levitation; and simultaneously applying, by the levitation driving device, a levitation force and a driving force on the maglev train in a running state through the levitation driving device to further accelerate the maglev train; and at the same time, levitating the maglev train via a levitation force until a running speed of the maglev train reaches a prescribed speed for a maglev section.

Assignees

• Univ Southwest Jiaotong

Inventors

• Deng Zigang
• Shi Hongfu
• Xiang Yuqing
• Zheng Jun
• Huang Huan

Classifications

• B61B13/08 Primary

  Sliding or levitation systems (vehicles with air cushions between rails and vehicles B60V3/04) · CPC title

• B60L13/04

  Magnetic suspension or levitation for vehicles · CPC title

• B60L2200/26

  Rail vehicles · CPC title

• B60L13/10 Primary

  Combination of electric propulsion and magnetic suspension or levitation · CPC title

• B61F11/00

  Rail vehicles characterised by rail-engaging elements other than wheels, e.g. balls · CPC title