A magnetic levitation train system and its levitation track

Abstract

A magnetic levitation train system and its suspension track, including two tracks arranged in parallel, characterized in that the two tracks are embedded with permanent magnet arrays and superconducting drive modules, and superconducting suspension coils for suspension and drive are arranged at corresponding positions on both sides of the superconducting levitation train; the permanent magnet array is formed by splicing a number of polygonal permanent magnets with different magnetization directions, and the polygonal permanent magnet is a polygon combination or a single polygon that can be arranged by plane rotation to fill the entire plane. The present invention uses permanent magnets with different magnetization directions to form a permanent magnet array, and through different topological structures such as triangles and rectangles, it can not only complete the magnetization of magnetic steel in the horizontal and vertical directions, but also complete the magnetization at different angles to the horizontal direction. By adjusting the magnetization angle, the magnetization direction of the permanent magnets regularly arranged in the track section will be closer to the direction of the magnetic field that propagates freely in the air, so as to achieve better magnetic field enhancement.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting magnetic levitation, in particular to a magnetic levitation train system and a levitation track thereof. Background Art

[0002] The common superconductors at present are type II superconductors, which do not fully exhibit the Meissner effect in the mixed state. The thinner superconductors will form quantized flux conduits inside to allow the magnetic lines of force to pass through. The passing magnetic lines of force will pin the superconducting material. If there is a position deviation, the magnetic lines of force will pass through the flux conduit via a longer path. According to the first theorem, a force will be generated to restore the superconducting material to its original position. Therefore, the high-temperature superconducting suspension system of type II superconductors has the property of self-stabilization and does not require an additional control system.

[0003] In the prior art, the high-temperature superconducting material suspension achieved refers to the suspension of commonly used yttrium barium copper oxide superconductors (YBCO), gadolinium oxide superconductors (GdBaCuO), and rare earth ReBaCuO superconductors. The suspension process is usually to cool the material to below the critical temperature in a constant magnetic field, and then be captured by the constant magnetic field to achieve the pinning effect of the superconductor on the magnetic flux. At this time, the superconducting suspension is a self-stabilizing passive system.

[0004] The permanent magnet rail in the traditional superconducting suspension model only forms a stable magnetic field by arranging permanent magnets in an NS manner to achieve the purpose of suspending the superconducting material. In the ordinary scheme, in order to enhance the magnetic field above the permanent magnet track, rare earth permanent magnets are usually used. Even so, the surface magnetic field strength provided by the track is very low, and the effect of enhancing the suspension force of the superconductor is very limited.

[0005] The inventions of CN106240399 B, CN2027345548 U, CN105463957 B, CN102717725 A, CN105803872 B, CN201049595 Y, and CN106240398 B are a series. In this series of inventions, it can be seen that the permanent magnet track of the above-mentioned permanent magnet array has been improved. The magnetizing direction of the traditional permanent magnet array is opposite to the vertical direction. In this series of inventions, the magnetizing direction of the permanent magnet is not only opposite in the vertical direction, but also opposite in the horizontal direction, so as to achieve the gain of the magnetic field strength above the traditional permanent magnet guide rail. The permanent magnet guide rails used for superconducting train suspension described in these inventions are all specific rectangular magnetic steels, which are arranged along specific magnetizing directions in the horizontal and vertical directions to achieve the purpose of increasing the magnetic field strength on the track. These inventions also introduce the arrangement of 5, 7, and 9 rectangular magnetic steels, but the difference between them is only the difference between single-peak and multi-peak magnetic fields generated by different magnetic steel arrangements. This series of inventions not only protects the aspect ratio of rectangular magnetic steels, the combination of rectangular magnetic steels with different soft magnetic materials, and the recombination of different rectangular magnetic steel combinations, but also has the same common purpose as the present invention, which is to increase the magnetic field strength on the upper surface of the permanent magnet guide rail. This series of inventions only limits the selected rectangular magnetic steels, and does not limit the use of different topological structures of the magnetic steels, and does not involve the fact that the permanent magnets can have more magnetization directions due to the selection of polygonal topological structure magnetic steels.

[0006] Invention CN106218441B is the application of the permanent magnets formed by the above-mentioned specific magnetization direction to make the guide rail. Because the topological structure of the guide rail itself is different, the application principle is different. In addition, the permanent magnet guide rail described in the present invention will generate a stronger magnetic field than this solution due to the specific arrangement, providing a greater suspension force per unit volume. CN106671822A and CN206327183U are also inventions of superconducting suspension trains, belonging to the same technical field as the present invention.

[0007] Suspension trains can also be divided into electromagnetic attraction suspension system EMS (Electromagnetic Suspension) and electromagnetic repulsion suspension EDS (Electrodynamic Suspension). The EMS system has a lower cost, but requires precise control of the electromagnetic force to achieve the suspension effect. The EDS suspension is stable, and the superconductor suspension can provide guiding force through the pinning effect, which is a self-stabilizing system. Summary of the invention

[0008] The purpose of the present invention is to provide a magnetic levitation train system and a levitation track thereof in view of the deficiencies in the above-mentioned prior art.

[0009] The technical solution of the present invention is: a magnetic levitation train system and its levitation track, including two tracks arranged in parallel and a superconducting levitation train, characterized in that the two tracks are embedded with permanent magnet arrays and superconducting drive modules, and superconducting levitation coils for levitation and driving are arranged at corresponding positions on both sides of the superconducting levitation train; the permanent magnet array is spliced ​​by a plurality of polygonal permanent magnets with different magnetization directions, and the polygonal permanent magnet is a polygon combination or a single polygon that can be arranged by plane rotation to fill the entire plane.

[0010] Furthermore, in the permanent magnet array, adjacent polygonal permanent magnets have different magnetizing directions, and magnetizing directions of adjacent magnetic steels form a certain angle β, β≤90°.

[0011] Furthermore, the polygonal permanent magnet is a combination of one or more of a triangle, a rectangle, and a hexagon.

[0012] Furthermore, the permanent magnet array is composed of a plurality of equilateral triangular permanent magnets interlocked up and down, which is convenient for assembly.

[0013] Furthermore, for the number of permanent magnets in a single row of equilateral triangle arrays, that is, the number of permanent magnets Z satisfies Z = 4*n+3, (n∈N * ).

[0014] Furthermore, the permanent magnet array is formed by splicing a plurality of regular hexagonal permanent magnets, and a regular triangular permanent magnet is arranged in the gap between two adjacent hexagonal permanent magnets.

[0015] Furthermore, the superconducting suspension coil is made of superconducting tape that is wound, cooled and magnetized to provide an ultra-strong 1-10T stable magnetic field. It not only cooperates with the permanent magnet array to provide superconducting suspension effect, but also cooperates with the stator coil of the driving linear motor to form a synchronous linear motor. The ultra-strong stable magnetic field generated by the superconducting suspension coil serves as the mover of the synchronous linear motor to realize the driving of the superconducting suspension train.

[0016] According to one embodiment of the present invention, the track includes a track base plate and track side plates on both sides of the track. The superconducting suspension train is located above the track base plate and between the two track side plates. A permanent magnet array is embedded in the track side plates. The superconducting drive module adopts a driving linear motor stator coil, and the driving linear motor stator coil is arranged on the outside of the permanent magnet array. Superconducting suspension coils are arranged at corresponding positions on the sides of the superconducting suspension train, and retractable auxiliary wheels are provided at the bottom of the superconducting suspension train.

[0017] The peak value of the driving magnetic field generated by the stator coil of the driving linear motor is much smaller than the knee value of the demagnetization curve of the permanent magnet array, so that the permanent magnet array will not be permanently demagnetized, and the driving magnetic field generated by the stator of the driving linear motor and the suspension magnetic field are perpendicular to each other in space and will not affect each other.

[0018] The permanent magnet array is composed of a plurality of polygonal permanent magnets with different magnetizing directions. The polygonal permanent magnet is a polygonal combination or a single polygon that can be arranged by plane rotation to fill the entire plane. The purpose is to simulate the free energy conduction route of magnetic flux lines in the air through the combination of different magnetizing directions to maximize the enhancement of the unilateral magnetic field on its surface.

[0019] The polygonal permanent magnet is made of neodymium iron boron permanent magnet or samarium cobalt permanent magnet.

[0020] The present invention adopts a permanent magnet array as a suspension rail to provide a suspension effect. The superconducting suspension train is equipped with a superconducting suspension coil. The superconducting suspension coil is wound with a superconducting tape, cooled and magnetized to provide a super strong 2-10T stable magnetic field. It not only provides a superconducting suspension effect, but also forms a linear motor with the superconducting driving rail. The super strong stable magnetic field generated by the superconducting suspension coil serves as the mover of the synchronous linear motor to achieve the driving of the superconducting suspension train. The peak value of the driving magnetic field generated by the stator of the driving linear motor is much lower than the knee value of the demagnetization curve of the permanent magnet rail, so that the permanent magnet rail will not be permanently demagnetized, and the driving magnetic field generated by the stator of the driving linear motor and the suspension magnetic field are perpendicular to each other in space and will not affect each other. At the same time, permanent magnets with different magnetization directions are spliced ​​to form a permanent magnet array. Through different topological structures such as triangles and rectangles, not only can the magnetization of magnetic steel in the horizontal and vertical directions be completed, but also the magnetization at different angles from the horizontal direction can be completed. By adjusting the magnetization angle, the magnetization direction of the permanent magnets regularly arranged in the track cross section will be closer to the direction of the magnetic field propagating freely in the air, so as to achieve better magnetic field enhancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a rendering of a model of the present invention for demonstrating the principle of a superconducting levitation train.

[0022] Figure 2 This is one of the partial enlarged views of the model.

[0023] Figure 3 This is the second partial enlarged view of the model.

[0024] Figure 4 This is the third partial enlarged view of the model.

[0025] Figure 5 This is the fourth partial enlarged view of the model.

[0026] Figure 6 The figure is a schematic diagram of the magnetization direction of a permanent magnet array in the prior art.

[0027] Figure 7This is a schematic diagram of the magnetization direction of the first embodiment of the permanent magnet array of the present invention.

[0028] Figure 8 It is a schematic diagram of the magnetization direction of the second embodiment of the permanent magnet array of the present invention.

[0029] Fig. 9 It is a permanent magnet array made of soft magnetic material.

[0030] Fig.10 This is the optimization result diagram of the magnetic density above the guide rail section calculated by finite element method. Each curve represents a different magnetization angle.

[0031] Fig.11 Comparison of magnetic field lines between traditional and equilateral triangle cross-section permanent magnet arrays with 3 polygon sides.

[0032] Fig.12 The magnetic field comparison between the traditional rectangular cross-section magnetic steel and the triangular cross-section magnetic steel 10mm above the guide rail.

[0033] Fig.13 The magnetic field comparison between the optimized traditional rectangular cross-section magnet and the triangular cross-section magnet 10mm above the guide rail.

[0034] Fig.14 Schematic diagram of different types of polygonal permanent magnets assembled onto the guide rail. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] A magnetic levitation train system and its suspension track, comprising a track, wherein the track comprises a track bottom plate 1, track side plates 2 located on both sides of the track, a superconducting suspension train 3 located above the track bottom plate 1 and between the two track side plates 2, characterized in that a permanent magnet array 4 is embedded inside the track side plates 2, a superconducting drive module 5 is also arranged inside the track side plates, the superconducting drive rail adopts a linear motor stator coil for driving, superconducting suspension coils 6 for suspension and driving are arranged at corresponding positions on both sides of the superconducting suspension train 3, and a retractable auxiliary wheel 7 is arranged at the bottom of the superconducting suspension train. The retractable auxiliary wheel 7 at the bottom of the superconducting suspension train is used for support at low speed and when stopped, and can be retracted when it enters a high-speed suspension state.

[0037] In order for a superconducting suspension train to travel normally in a straight line, two forces are required. One is to use a permanent magnet array to provide suspension force for the superconducting suspension coil so that the train is not subject to friction. The other is to use the linear motor stator coil and the superconducting suspension coil to provide driving force to drive the superconducting suspension train to accelerate and decelerate. The present invention aims to increase the magnetic field above the guide rail to provide a greater suspension force for the superconducting suspension coil.

[0038] The superconducting suspension coil is made of superconducting tape that is wound, cooled and magnetized to provide an ultra-strong 2-10T stable magnetic field. It not only cooperates with the permanent magnet array to provide superconducting suspension, but also cooperates with the stator coil of the driving linear motor to form a synchronous linear motor. The ultra-strong stable magnetic field generated by the superconducting suspension coil serves as the mover of the synchronous linear motor to realize the drive of the superconducting suspension train.

[0039] The entire superconducting tape wound rotor needs to be cooled by coolant. A cryogenic dewar can be used for cooling. The coolant can be selected from but not limited to liquid nitrogen and liquid helium. The temperature inside the cooling dewar is 1K-88K, preferably 4-30K. At the same time, the superconducting suspension coil needs to be magnetized and maintained regularly, because the magnetized superconducting suspension coil is equivalent to a super permanent magnet, but the resistance of the superconducting tape is not perfectly equal to 0, so there will be current loss, which requires regular maintenance. During maintenance, coolant needs to be added to the cryogenic dewar and the internal pressure needs to be controlled, and current needs to be passed into the superconducting suspension coil for magnetization.

[0040] The peak value of the driving magnetic field generated by the stator coil of the driving linear motor is much smaller than the knee value of the demagnetization curve of the permanent magnet array, so that the permanent magnet guide rail will not be permanently demagnetized, and the driving magnetic field generated by the stator of the driving linear motor and the suspension magnetic field are perpendicular to each other in space and will not affect each other.

[0041] In order to increase the magnetic field above the guide rail to provide a greater suspension force for the superconducting suspension coil, the permanent magnet array of the present invention is composed of a number of polygonal permanent magnets with different magnetization directions, and the polygonal permanent magnet is a polygonal combination or a single polygon that can be arranged by plane rotation to fill the entire plane. In the present invention, the magnetic steel blocks arranged adjacent to each other in the plane can not only realize the magnetic field directions in the horizontal and vertical directions, but also realize the magnetic field directions at different angles with the plane through different topological structures. The magnetization directions of adjacent magnetic steels are different, and there is an angle β between the magnetization directions of adjacent magnetic steels, β≤90°. The magnetization directions of the magnetic steels here can be more than just up, down, left, and right, and can also be selected to form various angles with the horizontal line, such as 30°, 45°, and 60°. For polygonal magnetic steels arranged in a single row, the magnetization directions of adjacent magnetic steels can start from the first magnetic steel on the left and rotate clockwise by a certain angle, such as 15°, 30°, or 60°.

[0042] Specifically, the present invention uses a minimum number of polygonal permanent magnets (such as isosceles triangles, isosceles trapezoids or isosceles hexagons) to form a specific array topology by adjusting the magnetization direction and arrangement direction of the magnetic steel, thereby increasing the magnetic field intensity and the effective area of ​​the magnetic field intensity above the guide rail, thereby generating a stronger unilateral magnetic field above, thereby increasing the load-bearing capacity of the superconductor suspended above it.

[0043] As shown in the figure, in the present embodiment, the permanent magnet array 4 is composed of 7 triangular permanent magnets interlocked up and down, which is easy to assemble. However, it should be understood by those skilled in the art that the permanent magnet array 4 can be composed of a plurality of polygonal permanent magnets with different magnetizing directions, and the polygonal permanent magnet is a polygonal combination or a single polygon that can be arranged by plane rotation to fill the entire plane, and its purpose is to simulate the free energy conduction route of magnetic flux lines in the air through the combination of different magnetizing directions, so as to maximize the unilateral magnetic field on its surface. The permanent magnet selected by the present invention is a rare earth permanent magnet with a large magnetic energy product, including but not limited to neodymium iron boron permanent magnet, samarium cobalt permanent magnet, etc.

[0044] Figure 6 The permanent magnet array shown adopts a planar arrangement structure of rectangular magnetic steels with different magnetization directions, which can realize horizontal and vertical magnetic field directions.

[0045] like Figure 7 As shown, according to the first embodiment of the present invention, the permanent magnet array adopts an equilateral triangle planar arrangement structure. As shown in the figure, the guide rail is a regular trapezoidal structure formed by seven equilateral triangle permanent magnets that are interlocked and spliced ​​in opposite directions, wherein the magnetization direction of each equilateral triangle permanent magnet points to different directions and positions, and the magnetic field direction at different angles in the plane can be realized. This structure requires chamfering at each vertex of the triangle, and the size of the chamfer curvature will affect the spatial distribution of the magnetic field, and the chamfer must be ≥0.5mm*45°.

[0046] like Figure 8 As shown, according to the second embodiment of the present invention, the permanent magnet array adopts an inverted trapezoidal structure formed by seven equilateral triangles interlocked in opposite directions, wherein the magnetization directions of the first three triangles point to the same point from different positions, the last three triangles point to different positions from the same point, and the middle one points horizontally. This arrangement is worse than the previous one, because in actual production, the same magnetic poles converge together, which will cause the magnetic steel with a triangular cross-section to be partially demagnetized, thereby affecting the magnetic field distribution on a single side surface. However, the experimental results show that it can still achieve a magnetic field gain of 8 to 42% relative to the permanent magnet array structure in the comparative literature.

[0047] The specific implementation examples selected by the present invention are an equilateral triangle and an isosceles trapezoid with a base angle of 60°, but the protection scope of the present invention is not limited to this. For example, a magnetic steel with a hexagonal topological structure with a base angle of 120° can also play a good effect in a three-dimensional arrangement.

[0048] For a single row of triangular array permanent magnets, that is, the number of magnetic steel blocks Z, Z = 4*n+3, (n∈N * ).

[0049] The topological structure of the permanent magnet can also be a polygon or a combination of polygons that can fill a plane. One of the preferred solutions is the regular triangle and the combination of a triangle and a hexagon in the implementation case, such as Fig.14 shown.

[0050] In the guide rail composed of polygonal magnetic steel that satisfies the above formula, the 4*nth, (n∈N * ) The polygonal permanent magnets can be replaced by soft magnetic materials, such as Fig. 9 As shown, in the guide rail composed of 7 polygonal permanent magnets, the 4th one can be replaced by a soft magnetic material.

[0051] To generalize the magnetization direction of each polygonal magnetic steel of the guide rail involved in the present invention, it should be stipulated that the direction parallel to the upper edge of the guide rail is the horizontal direction, the vector direction perpendicular to the horizontal direction and pointing to the right facing the guide rail cross section is the positive direction, and the magnetization angle θ is the angle after the horizontal direction changes in the positive direction counterclockwise. The local coordinate system of the permanent magnet guide rail is a right-handed system. α is the angle between the magnetizing direction of the first magnetic steel of the array in the present invention and the horizontal rightward direction. In the first embodiment of the present invention, the magnetizing direction of the first magnetic steel on the left is 30° counterclockwise rotated to the right along the horizontal direction, and then starting from the first magnetic steel, except for the fourth magnetic steel, the magnetizing directions of the remaining magnetic steels conform to the following rule, that is, the magnetizing direction of each magnetic steel to the right is 60° counterclockwise rotated compared with the magnetizing direction of the previous magnetic steel, and the magnetizing direction of the fourth magnetic steel is horizontal to the left. In this way, the magnetizing directions of the adjacent magnetic steels will not cause the convergence of magnetic poles and the occurrence of partial demagnetization. It can be clearly seen in the figure that the magnetic flux lines converge together to form a magnetic field convergence, which plays a role in further enhancing the magnetic field.

[0052] As a generalization, if the base of the first triangular magnet from left to right is horizontal, the angle between the magnetization direction of the first triangular magnet and the horizontal right direction is α The angle between the magnetization direction of each magnet in the entire permanent magnet array and the horizontal right direction is θ (θ∈R), and the angle is positive in the counterclockwise direction. * ) magnetization direction The [] in the function is the rounding function.

[0053] against Figure 8 That is, the problem caused by the magnetization method of the second embodiment can be solved by replacing the magnetic steel in the middle part with soft magnetic material. The specific implementation method is as follows: Fig. 9As shown, the gray part in the figure is a replacement soft magnetic material, and the direction of the internal magnetic flux is generally close to the horizontal direction. Adding soft magnetic material will greatly reduce the magnetic field strength of the left and right magnetic poles, so that the demagnetization problem caused by the same magnetic poles converging together will be reduced. However, since the permanent magnet is replaced by soft magnetic material, the magnetic field strength on its surface will be greatly reduced. Compared with the arrangement of the first embodiment of the present invention, the magnetic field strength 10mm above it decreases by 15-30%, so it can only achieve a gain of ≤12% for the magnetic field strength above the magnet array in the comparative literature. The first embodiment is not suitable for the optimization method using soft magnetic materials, because the permanent magnets of two adjacent equilateral triangle cross-sections produce a larger curl of the magnetic field due to the topological structure, so if soft magnetic materials are used for magnetic flux conduction, a vortex magnetic field will be formed inside it, which greatly causes energy waste and reduces surface magnetism.

[0054] Fig.11 The comparison is shown in the literature and Figure 7 The comparison of the magnetic field lines distribution of the triangular cross-section permanent magnet shown in the figure is compared with the traditional rectangular magnet. The left side is the magnetic field lines of the permanent magnet array composed of traditional rectangular magnets, and the magnetization direction of the rectangular magnets is up, down, left and right. The right side is the magnetic field lines of the permanent magnet array with a regular triangular cross-section of the first embodiment. It can be clearly seen that the triangular cross-section permanent magnet used can better converge the magnetic field above the guide rail into a single peak, and show a stronger enhancement effect on the magnetic field above the guide rail.

[0055] By performing finite element simulation calculation on the magnetic field distribution at 10 mm above the track, it can be clearly seen that the permanent magnet array of the present invention has an enhanced effect on the traditional permanent magnet array. Fig.10 The calculation results show that under the same cross-sectional area of ​​the permanent magnet, that is, when the amount of the permanent magnet is controlled to be constant, the magnetic field distribution 10mm above the present invention is compared with the magnetic field distribution 10mm above the traditional rectangular cross-section permanent magnet array as follows. According to the results, it can be seen that the maximum value of the magnetic field is increased from 0.54T to 0.9T, and the gain value compared with the traditional solution can reach an astonishing 67%. Considering the influence of the actual processing technology and the influence of chamfering, the gain can reach 40-60%; in the figure, the horizontal axis is the horizontal distance of the guide rail, and the vertical axis is the magnetic flux density 10mm above the guide rail.

[0056] In order to further verify the gain of the magnetic field 10mm above the guide rail by the magnetization method of the present invention, the aspect ratio of the rectangular cross-section permanent magnet is also optimized. The optimization results show that when the 1260mm 2When the cross-sectional area remains unchanged, the optimal width of the vertically magnetized permanent magnet of the traditional rectangular cross-section permanent magnet is 9.1mm, and the rectangular cross-sectional width of the horizontally magnetized permanent magnet is 29.4mm. The height of the guide rail is 14.6mm, and the maximum magnetic field intensity 10mm above it is increased from 0.54T to 0.63T, which proves the feasibility of the optimization method. Fig.13 As shown in the figure, the horizontal axis is the horizontal distance of the guide rail, the vertical axis is the magnetic flux density 10mm above the guide rail, the dotted line is the maximum magnetic density that can be achieved after size optimization in the traditional rectangular optimal magnetization scheme, and the solid line is the magnetic field distribution 10mm above the permanent magnet array of the equilateral triangle cross section of the first embodiment of the present invention. It can be seen that compared with the traditional rectangular optimal magnetization scheme, the gain effect of the present invention can still reach 43%. Excluding the influence of processing technology and chamfering, its gain effect can still reach 25%-40%.

[0057] The calculation method for the suspension force above the guide rail is:

[0058]

[0059] Among them J c is the critical current density; B z is the vertical magnetic flux density; L, W, H are the length, width and height of the suspended high-temperature superconducting block; δ is the penetration depth of the magnetic field.

[0060]

[0061] in is the capture field of the superconducting block; λ is the Changgang coefficient; μ0 is the vacuum magnetic permeability.

[0062] It can be seen from the above formula that the magnitude of the suspension force provided by the suspension track is related to the strength of the magnetic field above the guide rail. Therefore, this solution adopts a special magnetic concentrating structure to increase the magnetic field on one side above the guide rail to provide greater suspension force.

[0063] like Fig.14 The figure shows a schematic diagram of a guide rail composed of different polygonal permanent magnets. The permanent magnet guide rail is composed of several regular hexagonal permanent magnets, and regular triangular permanent magnets are arranged in the upper and lower gaps between two adjacent regular hexagonal permanent magnets. The magnetization direction of the regular hexagon is horizontal and vertical, while the magnetization direction of the triangular permanent magnet is at an angle of 30° to the horizontal direction, and the corresponding upper and lower regular triangle magnetization directions are parallel.

Claims

1. A magnetic levitation train system and its suspension track, comprising two parallel arranged tracks and a superconducting suspension train, characterized in that The two tracks are embedded with permanent magnet arrays and superconducting drive modules. Superconducting suspension coils for suspension and drive are arranged at corresponding positions on both sides of the superconducting suspension train. The permanent magnet array is composed of a number of polygonal permanent magnets with different magnetization directions. The polygonal permanent magnet is a polygon combination or a single polygon arranged by plane rotation to fill the entire plane. The permanent magnet array includes two methods. The first method is composed of seven equilateral triangular permanent magnets interlocked up and down. The magnetization direction of the first magnet on the left is to rotate 30° counterclockwise to the right along the horizontal direction. Then, starting from the first magnet, except for the fourth magnet, the magnetization directions of the remaining magnets conform to the following rule, that is, the magnetization direction of each magnet to the right is rotated 60° counterclockwise compared with the magnetization direction of the previous magnet, and the magnetization direction of the fourth magnet is The first mode is to splice a plurality of regular hexagonal permanent magnets, and arrange a regular triangular permanent magnet in the gap between two adjacent hexagonal permanent magnets. The magnetizing direction of the regular hexagon is horizontal and vertical, while the magnetizing direction of the triangular permanent magnet is at an angle of 30° to the horizontal direction, and the corresponding upper and lower regular triangular magnetizing directions are parallel. The track includes a track bottom plate, track side plates on both sides of the track, the superconducting suspension train is located above the track bottom plate and between the two track side plates, a permanent magnet array is embedded in the track side plates, the superconducting drive module adopts a driving linear motor stator coil, the driving linear motor stator coil is arranged on the outside of the permanent magnet array, a superconducting suspension coil is arranged at a corresponding position on the side of the superconducting suspension train, and a retractable auxiliary wheel is arranged at the bottom of the superconducting suspension train.

2. The maglev train system and the levitation track thereof as claimed in claim 1, characterized in that The superconducting suspension coil is made of superconducting tape that is wound, cooled and magnetized to provide an ultra-strong and stable magnetic field.

3. The maglev train system and the levitation track thereof according to claim 1, characterized in that: The polygonal permanent magnet is made of neodymium iron boron permanent magnet or samarium cobalt permanent magnet.

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