Continuous conductor plate for magnetic suspension automobile

Abstract

The utility model discloses a continuous conductor plate for a magnetic suspension automobile, which comprises a first conductor plate and a second conductor plate which are connected with each other, the end part of the first conductor plate is provided with a first splicing part, the end part of the second conductor plate is provided with a second splicing part, and the shapes of the first splicing part and the second splicing part are complementary. And the first splicing part and the second splicing part are spliced together to form a continuous conductor plate. When the magnetic wheel of the magnetic suspension automobile passes through the gap between the conductor plates, the first conductor plate provides an eddy current field before passing through the gap, and the second conductor plate provides an eddy current field after passing through the gap, so that the continuity of eddy current is ensured, and the operation efficiency of the whole system of the magnetic suspension automobile and the conductor plates is improved.

Description

Technical Field

[0001] This utility model relates to the field of track magnetic levitation vehicles, and more specifically, to a conductor plate. Background Technology

[0002] The road surface of a maglev car is called a conductor plate. The conductor plate is placed beneath the maglev car. The magnetic field generated by the car's magnetic wheels creates relative motion between the conductor plate and the magnetic field within a confined space. This changes the magnetic flux in the conductor plate, inducing an electromotive force (EMF), which in turn generates a strong induced current. The induced magnetic field generated by this current interacts with the magnetic field of the magnetic wheels, causing the wheels to produce levitation force and magnetic resistance, propelling the maglev car forward. Currently, there is considerable research on maglev trains and their tracks, but no patents exist related to the road surface of maglev cars. Utility Model Content

[0003] The inventors of this invention discovered that the track lengths for magnetic levitation vehicles in engineering applications typically reach hundreds or thousands of meters, while the length of a single conductor plate is relatively limited. Therefore, it is inevitable to splice multiple conductor plates together, resulting in gaps between the plates. Furthermore, due to the good ductility of the conductor plates, gaps are usually reserved between them to address the engineering problem of thermal expansion and contraction, functioning similarly to expansion joints on viaducts. When the onboard magnet travels along the conductor plate track and passes through an expansion joint, this is equivalent to an open circuit in the equivalent circuit model; that is, the induced eddy currents are interrupted, leading to a sudden change in levitation force. As the vehicle travels along the long track, the expansion joints appear periodically, and the electromagnetic force also changes periodically.

[0004] The inventors of this invention studied three arrangements of conductor plates: side-by-side placement, welding at the plate seams, and adding a superimposed plate at the conductor plate joints. The following drawbacks were discovered.

[0005] First method: Conductor plates placed side by side

[0006] When a permanent magnet array passes through the gap region of a conventional straight-slit conductor plate, the eddy currents are interrupted due to the discontinuity of the conductor structure at this point, and a longitudinal edge effect is generated at the cross-section. This phenomenon leads to a sharp change in electromagnetic force, which in turn adversely affects the overall stability of the system.

[0007] The second method: welding at the joints of the plates.

[0008] This method mainly involves welding a layer of about 1-2 mm thick to the upper surface of the seam between the two conductor plates, which weakens the induced eddy currents at the weld. Furthermore, the welding makes the upper surfaces of the conductor plates a single unit, which cannot accommodate the thermal expansion and contraction characteristics of the materials.

[0009] The third method: Add a superimposed plate at the joint of the conductor plate.

[0010] Adding a superimposed plate above the expansion joint to achieve electrical connection also faces many challenges. The thickness of the superimposed plate is a major problem: if the superimposed plate is too thin, it may not be able to effectively connect the conductors during low-speed operation due to the skin effect; conversely, if the superimposed plate is too thick, it will directly compress the suspension gap, thereby causing greater fluctuations in suspension force.

[0011] To overcome the above defects, the inventor of this utility model proposes a continuous conductor plate for magnetic levitation vehicles, and the implementation scheme is as follows.

[0012] A continuous conductor plate for a magnetic levitation vehicle includes a first conductor plate and a second conductor plate connected to each other. The first conductor plate has a first splicing portion at one end, and the second conductor plate has a second splicing portion at one end. The shapes of the first and second splicing portions are complementary. The first and second splicing portions are joined together to form a continuous conductor plate. When the magnetic wheels of the magnetic levitation vehicle pass through the gaps between the conductor plates, the first conductor plate provides the eddy current field before passing through the gaps, and the second conductor plate provides the eddy current field after passing through the gaps, ensuring the continuity of the eddy currents.

[0013] In a preferred embodiment, the longitudinal cross-sectional shape of the first splicing portion and the second splicing portion is L. The L-shaped structure is simple and relatively easy to manufacture.

[0014] In a preferred embodiment, the first conductor plate has a first receiving portion for accommodating the second splicing portion, and the second conductor plate has a second receiving portion for accommodating the first splicing portion, so that the first conductor plate and the second conductor plate can be spliced ​​together.

[0015] In a preferred embodiment, the first splicing portion and the second splicing portion are characterized by having a gap to accommodate the thermal expansion and contraction of the first conductor plate and the second conductor plate.

[0016] In a preferred embodiment, a continuous conductor plate is laid along the X direction, and the first splice and the second splice have a gap in the X direction, which can be continuously extended to form the road surface for the maglev car to travel on.

[0017] In a preferred embodiment, the gap distance is greater than or equal to 1 mm to accommodate the more intense thermal expansion and contraction of some materials.

[0018] In a preferred embodiment, the end faces of the first splicing part and the second splicing part are inclined surfaces, and the end faces of the first splicing part and the second splicing part are parallel to each other, which helps to provide a stable eddy current field when the maglev car passes through the gap.

[0019] In a preferred embodiment, the inclination angle of the ramp is 0-90 degrees, and the ramp helps to provide a stable eddy current field when the maglev car passes through the gap.

[0020] In a preferred embodiment, the inclination angle of the ramp is 45 degrees, which is relatively balanced between the load-bearing capacity of the conductor plate and the provision of a stable eddy current field. This is beneficial for both the load-bearing capacity of the conductor plate and the provision of a stable eddy current field when the maglev car passes through the gap.

[0021] In a preferred embodiment, the distance between the first splicing portion and the second splicing portion is greater than or equal to 1 mm.

[0022] The beneficial effects of this utility model embodiment are: the first splicing part and the second splicing part are spliced ​​together, the structure is simple, when the magnetic wheel of the magnetic levitation car passes through the gap between the conductor plates, the first conductor plate provides the eddy current field before passing through the gap, and the second conductor plate provides the eddy current field after passing through the gap, which ensures the continuity of the eddy current and improves the operating efficiency of the entire system of magnetic levitation car and conductor plate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a side view of the overlap of the first conductor plate and the second conductor plate in an embodiment of this utility model.

[0025] Figure 2 This is a three-dimensional schematic diagram of the overlap of the first conductor plate and the second conductor plate in an embodiment of this utility model.

[0026] Figure 3 This is a three-dimensional schematic diagram of the oblique seam splicing of the first conductor plate and the second conductor plate in an embodiment of this utility model.

[0027] Figure 4 This is a side view schematic diagram of the oblique seam splicing of the first conductor plate and the second conductor plate in an embodiment of this utility model.

[0028] Figure 5 This is a top view schematic diagram of the conductor plate in this embodiment of the present invention, showing straight overlap and curved oblique seam splicing. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] This utility model discloses a continuous conductor plate for a magnetic levitation vehicle. The continuous conductor plate includes at least two conductor plates that are connected to each other. Specific embodiments are as follows.

[0031] Example 1: Straight-line overlap

[0032] Please refer to Figure 1 and Figure 2 In one example, the continuous conductor plate includes a first conductor plate 1 and a second conductor plate 2. The first conductor plate 1 has a first splicing portion 5 and a first receiving portion 7, and the second conductor plate 2 has a second splicing portion 6 and a second receiving portion 8. The shapes of the first splicing portion 5 and the second splicing portion 6 are complementary. The first splicing portion 5 is placed in the second receiving portion 8, and the second splicing portion 6 is placed in the first receiving portion 7. After being spliced ​​together, the two conductor plates are joined together. In one embodiment, the longitudinal cross-sectional shapes of the first splicing portion 5 and the second splicing portion 6 are both L-shaped. There is a gap between the first splicing portion 5 and the second splicing portion 6. In actual use, there is a gap between the first splicing portion 5 and the second splicing portion 6, and the first splicing portion 5 and the second splicing portion 6 do not contact each other. In one example, the gap between the first splicing portion 5 and the second splicing portion 6 is greater than or equal to 1 mm.

[0033] Continuous conductor plate along Figure 2 The X-direction laying in the design refers to the direction in which one conductor plate is laid before another is laid. This can also be understood as the forward or backward direction of the maglev vehicle. There is a gap along the X-direction between the first splicing part 5 and the second splicing part 6, with a gap distance greater than or equal to 1 mm. In one example, there is no gap between the upper and lower contact surfaces of the first splicing part 5 and the second splicing part 6, thus the splicing part of the conductor plate has good load-bearing capacity.

[0034] The splicing of the first conductor plate 1 and the second conductor plate 2 is also called overlapping. When using the overlapping method, as the magnetic wheels of the maglev car pass through the gap, the conductor plate located below provides an eddy current field, thereby forming a relatively continuous eddy current, enabling the maglev car to have sufficient levitation force and driving force to smoothly pass through the conductor plate joint. This splicing method is mainly suitable for splicing at the straight sections of the conductor plates.

[0035] Example 2: Beveled joint splicing of curved sections

[0036] Please refer to Figure 3 and Figure 4 The difference between Embodiment 2 and Embodiment 1 is that the shape of the conductor plate end is different. In Embodiment 2, the longitudinal section of the conductor plate end is a diagonal line, and the conductor plate in Embodiment 2 does not have a receiving part.

[0037] The end faces of the first conductor plate 3 and the second conductor plate 4 are both inclined surfaces. The end inclined surface 9 of the first conductor plate 3 and the end inclined surface 10 of the second conductor plate 4 are parallel to each other, and the inclination angles of the end inclined surfaces 9 and 10 are the same. In one example, the inclination angle of the end inclined surfaces 9 and 10 is 45 degrees. It should be understood that the inclination angle of the end faces of the first splicing portion and the second splicing portion is 0-90 degrees. In a preferred embodiment, the inclination angle of the end faces of the first splicing portion and the second splicing portion is less than or equal to 45 degrees. It should be understood that the end inclined surfaces 9 and 10 are also referred to as splicing portions.

[0038] In practical use, there is a gap between end bevel 9 and end bevel 10, and they do not contact each other, allowing space for the conductor to expand and contract due to thermal expansion and contraction. In one example, the gap between end bevel 9 and end bevel 10 is greater than or equal to 1 mm. Although the bevel splicing will cause a certain degree of interruption of eddy currents in the conductor plate at the bevel, this splicing method has a simpler structure and is suitable for the turning points of the conductor plate track.

[0039] Example 3: Combination of curves and straight sections

[0040] Please refer to Figure 4 and Figure 5 This demonstrates the splicing of conductor plates in a maglev car, which consists of straight and curved sections. By combining overlapping and diagonal seam splicing methods, not only is the continuity and stability of the maglev track ensured, but the transmission efficiency of eddy currents is also optimized.

[0041] During implementation, conductor plates 11, 12, 13, and 14 in straight sections are spliced ​​using an overlapping method, specifically at joints 15 and 16. First, conductor plates of appropriate length are selected and precisely cut into two sections: a conductor plate below the overlapping joint and a conductor plate above the overlapping joint. Next, the top of the first conductor plate 1 is tightly overlapped with the bottom of the second conductor plate 2 to ensure a good electrical connection. Simultaneously, a gap of at least 1 mm is maintained between the first splicing part 5 and the second splicing part 6 to accommodate the expansion and contraction of the conductors due to thermal expansion and contraction. This not only ensures the durability of the conductor plates but also provides a stable eddy current field from the lower conductor plate when the magnetic wheels of the maglev car pass through the joint, allowing the maglev car to pass smoothly and continuously through the joint.

[0042] The conductor plates 17, 18, 19 and 20, 21, 22 in the curved section adopt a bevel splicing method, that is, the joints 23, 24 and 25, 26 are overlapped. The conductor plates are cut into beveled shapes, namely the conductor plate below the bevel and the conductor plate above the bevel. This simplifies the structure of the curved section and reduces the interruption of eddy currents at the bevel to a certain extent. In actual use, the bevels of the two conductor plates are kept parallel and do not touch, and a gap of at least 1 mm is left in between to accommodate deformation caused by thermal expansion and contraction.

[0043] At the junctions between the straight and curved sections, specifically at joints 27, 28, 29, and 30, a conductor plate overlapping method is used to ensure a smooth transition and the continuity of eddy currents. This overlapping method not only guarantees the stability of the maglev vehicle when passing through the junctions but also effectively reduces energy loss and eddy current interruption, thereby improving the overall operating efficiency of the maglev vehicle.

[0044] The two conductor plate splicing methods are applicable to the splicing of conductor plates on straight sections and at curves, respectively. This not only improves the flexibility of conductor plate arrangement, but also better adapts to the operating requirements of maglev cars on straight and curved roads.

[0045] For the overlapping conductor plates in Example 1, when the magnetic wheels of the maglev car pass through the gap, the first conductor plates 1 and 3 provide the eddy current field before passing through the gap, and the second conductor plates 2 and 4 provide the eddy current field after passing through the gap, ensuring the continuity of the eddy currents. These two methods together optimize the distribution of eddy currents in the conductor plates and improve the operating efficiency of the system.

[0046] Because adjacent conductor plates are joined using overlapping or diagonal seams, the system boasts high stability and low manufacturing and maintenance costs. More importantly, when the magnetic wheels of the maglev car pass through the seams, the joints of the conductor plates provide a stable eddy current field, and after passing through, the joints of the next conductor plate provide a stable eddy current field. This allows the maglev car to smoothly and continuously pass through the seams between adjacent conductor plates. It provides a relatively continuous eddy current field when the maglev car passes through the seams, thus ensuring sufficient levitation and driving force. This significantly reduces the abrupt changes in electromagnetic force caused by discontinuities in the conductor structure, thereby improving the overall stability of the system.

[0047] A gap of at least 1 mm is provided between the splicing surfaces of adjacent conductor plates to provide sufficient space for the conductor to expand and contract due to temperature changes, effectively avoiding structural damage or performance degradation caused by thermal expansion and contraction of materials.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A continuous conductor plate for use in magnetic levitation vehicles, characterized in that, The continuous conductor plate includes a first conductor plate and a second conductor plate connected to each other. The first conductor plate has a first splicing portion at its end, and the second conductor plate has a second splicing portion at its end. The shapes of the first splicing portion and the second splicing portion are complementary. The first splicing portion and the second splicing portion are spliced ​​together to form a continuous conductor plate.

2. The continuous conductor plate according to claim 1, characterized in that, The longitudinal cross-sectional shape of the first splicing part and the second splicing part is L.

3. The continuous conductor plate according to claim 2, characterized in that, The first conductor plate has a first receiving portion for accommodating the second splice portion, and the second conductor plate has a second receiving portion for accommodating the first splice portion.

4. The continuous conductor plate according to claim 3, characterized in that, There is a gap between the first splicing part and the second splicing part.

5. The continuous conductor plate according to claim 4, characterized in that, The continuous conductor plate is laid along the X direction, and the first splice and the second splice have a gap in the X direction.

6. The continuous conductor plate according to claim 5, characterized in that, The distance of the gap is greater than or equal to 1 mm.

7. The continuous conductor plate according to claim 1, characterized in that, The end faces of the first splicing part and the second splicing part are inclined surfaces, and the end faces of the first splicing part and the second splicing part are parallel to each other.

8. The continuous conductor plate according to claim 7, characterized in that, The inclination angle of the inclined plane is 0-90 degrees.

9. The continuous conductor plate according to claim 8, characterized in that, The inclination angle of the inclined plane is 45 degrees.

10. The continuous conductor plate according to claim 8, characterized in that, The distance between the first splicing part and the second splicing part is greater than or equal to 1 mm.

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