Double-excitation magnetic wheel driving device

Abstract

The invention provides a double-excitation magnetic wheel driving device, which relates to the technical field of maglev trains and comprises a train body, a track system, a magnetic wheel system and a driving system, the rail system comprises a guide rail structure and a rail base, the rail base is arranged below the vehicle body, and the guide rail structure is arranged between the vehicle body and the rail base; the number of the magnetic wheel systems is at least two, the two magnetic wheel systems are both arranged between the vehicle body and the track base, the two magnetic wheel systems are symmetrically arranged below the vehicle body along the guide rail structure, and gaps are formed between the magnetic wheel systems and the guide rail structure; and the driving system is arranged between the track system and the magnetic wheel system and is used for driving the magnetic wheel system to rotate. According to the invention, the driving force is improved, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation trains, and in particular to a dual-excitation magnetic wheel driving device. Background Art

[0002] Existing maglev trains are primarily driven by linear motors, including long-stator linear synchronous motors (LSMs) and short-stator linear induction motors (LIMs). Long-stator LSMs are expensive and complex to control, while short-stator LIMs are inefficient and have low thrust.

[0003] The existing magnetic wheel drive scheme fails to fully utilize the magnetic field generated by permanent magnets, resulting in a large demand for permanent magnetic wheels and excessively high costs for permanent magnetic wheels. The existing technology requires a conductor plate at each end of the left and right ends of the vehicle, resulting in excessively high track costs; the existing technology's magnetic wheel drive system has force fluctuations perpendicular to the conductor plate during operation, which is reflected in the vehicle as lateral vibration, thereby affecting ride comfort; and the existing technology's magnetic wheel system is exposed at the edge of the vehicle, posing a safety hazard.

[0004] Therefore, there is an urgent need for a dual-excitation magnetic wheel drive device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-excitation magnetic wheel drive device to solve the above problems. In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The present application provides a dual-excitation magnetic wheel drive device, comprising: a vehicle body, a track system, a magnetic wheel system and a drive system; the track system comprises a guide rail structure and a track base, the track base is arranged below the vehicle body, and the guide rail structure is arranged between the vehicle body and the track base; the magnetic wheel system is provided with at least two groups, both groups of the magnetic wheel systems are arranged between the vehicle body and the track base, the two groups of the magnetic wheel systems are symmetrically arranged below the vehicle body along the guide rail structure, and a gap is provided between the magnetic wheel system and the guide rail structure; the drive system is arranged between the track system and the magnetic wheel system, and the drive system is used to drive the magnetic wheel system to rotate.

[0007] Optionally, the guide rail structure is a conductor plate, the guide rail structure is arranged along the traveling direction of the vehicle body, and the guide rail structure and the rail base are arranged perpendicular to each other.

[0008] Optionally, the magnetic wheel system includes an inner yoke, a permanent magnet and an outer yoke, the permanent magnet is arranged on the vehicle body and the track base, the inner yoke is arranged on the outer side wall of the permanent magnet, and the outer yoke is arranged on the inner side wall of the permanent magnet.

[0009] Optionally, the magnetic poles of the magnetic wheel systems are arranged oppositely along the middle surface of the guide rail structure, and the two magnetic wheel systems rotate in opposite directions and have the same size.

[0010] Optionally, the drive system is provided with at least two groups, each group of the drive system is a rotating motor, and the drive system drives the magnetic wheel system to rotate.

[0011] Optionally, the conductor plate material in the guide rail structure is a non-magnetic high conductivity material.

[0012] Optionally, an upper surface of the conductor plate in the guide rail structure is higher than an upper surface of the magnetic wheel system, and a lower surface of the conductor plate in the guide rail structure is lower than a lower surface of the magnetic wheel system.

[0013] Optionally, the permanent magnetic wheels in the magnetic wheel system are arranged in a ring structure of a Halbach periodic array, and the magnetization angle of the Halbach periodic array is set to be between 15° and 90°.

[0014] Optionally, the magnetic wheel system and the guide rail structure are set to 10mm-40mm.

[0015] Optionally, the center line of the magnetic wheel system and the center line of the drive system are located on the same straight line.

[0016] The beneficial effects of the present invention are:

[0017] The dual-excitation magnetic wheel drive device of the present invention requires fewer magnetic wheel systems and drive systems to produce the same driving force. The magnetic wheels are symmetrically arranged at either end of a non-magnetic conductive plate. The plates are simultaneously excited by two permanent magnetic wheels, generating approximately twice the eddy currents and twice the magnetic field of a single magnetic wheel, thereby quadrupling the driving force. The dual-excitation magnetic wheel drive solution proposed by the present invention increases the driving force of a single magnetic wheel by approximately one-fold, reducing the number and cost of required magnetic wheel and drive systems. By integrating two existing drive systems into one, the present invention reduces the number of conductive plates required from two to one, eliminating the need for side walls around the conductive plate. The symmetrical arrangement of the magnetic wheels completely eliminates the lateral vibration inherent in existing arrangements, and the magnetic wheel system relies solely on the interaction between the magnetic wheels to maintain symmetry about the conductive plate. The magnetic wheel system and guide rails of the present invention are concealed beneath the vehicle, making them safer than existing arrangements located at both ends. Furthermore, the dual-excitation magnetic wheel drive solution of the present invention provides superior guiding force to existing solutions.

[0018] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or be understood by practicing the embodiments of the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the structure of the dual-excitation magnetic wheel drive device according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A magnified schematic diagram of point B in the middle;

[0022] Figure 3 for Figure 1 Schematic diagram of the cross section at AA in the middle;

[0023] Figure 4 Schematic diagrams comparing the magnetic field and eddy current of the dual-excitation magnetic wheel drive device according to an embodiment of the present invention with those of the prior art;

[0024] Figure 5 A schematic diagram comparing the driving force of each magnetic wheel system of the dual-excitation magnetic wheel driving device according to an embodiment of the present invention with that of the prior art;

[0025] Figure 6 Schematic diagram comparing the guiding force of the dual-excitation magnetic wheel drive device described in an embodiment of the present invention with that of the prior art.

[0026] Markings in the figure: 1. Vehicle body; 2. Drive system; 3. Magnetic wheel system; 4. Track system; 31. Inner yoke; 32. Permanent magnet; 33. Outer yoke; 41. Guide rail structure; 42. Track base. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first" and "second" are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0029] Example 1:

[0030] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, this embodiment provides a dual-excitation magnetic wheel drive device, including: a vehicle body 1, a track system 4, a magnetic wheel system 3 and a drive system 2, wherein the track system 4 includes a guide rail structure 41 and a track base 42, the track base 42 is arranged below the vehicle body 1, and the guide rail structure 41 is arranged between the vehicle body 1 and the track base 42; the magnetic wheel system is provided with at least two groups, both groups of the magnetic wheel systems are arranged between the vehicle body 1 and the track base 42, and the two groups of the magnetic wheel systems 3 are symmetrically arranged below the vehicle body along the guide rail structure 41, with a gap provided between the magnetic wheel system 3 and the guide rail structure 41; the drive system 2 is arranged between the track system 4 and the magnetic wheel system, and the drive system 2 is used to drive the magnetic wheel system 3 to rotate.

[0031] It can be understood that the dual-excitation magnetic wheel drive device of the present invention requires fewer magnetic wheel systems 3 and drive systems 2 to generate the same driving force. The magnetic wheels are symmetrically arranged at both ends of the non-magnetic conductor plate. The non-magnetic conductor plate is simultaneously excited by two permanent magnetic wheels to generate about twice the eddy current and twice the magnetic field effect equivalent to the excitation of a single magnetic wheel, thereby achieving a four-fold driving force improvement effect. Figure 4 As shown in FIG, the dual-excitation magnetic wheel drive device proposed in the present invention is far superior to the existing layout scheme in terms of magnetic field and eddy current penetration. Figure 5 As shown, the present invention proposes a dual-excitation magnetic wheel drive solution, in which the driving force of a single magnetic wheel is increased by about 1 times, reducing the number and cost of the required magnetic wheel system 3 and drive system 2. The present invention completely eliminates the lateral vibration that is difficult to avoid in the existing arrangement solution by symmetrically arranging the magnetic wheels, and the magnetic wheel system 3 can ensure that the magnetic wheels are symmetrical about the conductor plate only by relying on the force between the magnetic wheels. The magnetic wheel system 3 and the guide rail of the present invention are hidden at the bottom of the vehicle, which is safer than the existing solution of arranging them at both ends. Figure 6 As shown, the guiding force of the dual-excitation magnetic wheel driving solution of the present invention is better than that of the prior art solution.

[0032] It will be appreciated that when the drive systems 2 of the present invention are in operation, the two drive systems 2 rotate the magnetic wheel systems 3 at the same speed and in opposite directions. Excited by the two magnetic wheel systems 3, the conductive plate generates a mirror image magnetic field in the opposite direction of the rotating magnetic field, which interacts with the magnetic field of the magnetic wheels to generate magnetic resistance and repulsion, which serve as the driving and guiding forces for the vehicle body 1.

[0033] When the equivalent linear velocity of the magnetic wheel is greater than the translational velocity of the vehicle, the rotating magnetic field generated by the two magnetic wheel systems 3 generates eddy currents in the conductor plate. The magnetic resistance and repulsive force generated by the eddy currents and the rotating magnetic field generated by the two magnetic wheel systems 3 serve as the driving force and guiding force of the vehicle body 1. At this time, the train is in a driving state.

[0034] When the equivalent linear velocity of the magnetic wheel is equal to the translational velocity of the vehicle, the rotating magnetic field generated by the two magnetic wheel systems 3 will not generate eddy currents in the conductor plate, and the train will be in a coasting state.

[0035] When the equivalent linear velocity of the magnetic wheel is less than the translational velocity of the vehicle, the rotating magnetic field generated by the two magnetic wheel systems 3 generates eddy currents in the conductor plate. At this time, the magnetic resistance and repulsive force generated by the eddy currents will serve as the braking force and guiding force of the train. At this time, the train is in a braking state.

[0036] The guide rail structure 41 is a conductive plate, and is arranged along the moving direction of the vehicle body 1 . The guide rail structure 41 and the rail base 42 are arranged perpendicular to each other.

[0037] It is understandable that the present invention integrates the two existing drive systems 2 into one, thereby reducing the number of required conductor plates from two to one, and eliminating the need to install side walls of the conductor plates.

[0038] The magnetic wheel system 3 includes an inner yoke 31, a permanent magnet 32 and an outer yoke 33. The permanent magnet 32 is arranged on the vehicle body 1 and the track base 42. The inner yoke 31 is arranged on the outer wall of the permanent magnet 32, and the outer yoke 33 is arranged on the inner wall of the permanent magnet 32.

[0039] It can be understood that the arrangement of the inner yoke 31 , the permanent magnet 32 and the outer yoke 33 of the present invention enables the drive system 2 to stably drive the permanent magnet 32 to rotate.

[0040] The magnetic poles of the magnetic wheel system 3 are arranged opposite to each other along the middle surface of the guide rail structure 41 , and the two magnetic wheel systems 3 rotate in opposite directions and have the same size.

[0041] As can be appreciated, the dual-excitation scheme proposed in this invention places the magnetic wheels symmetrically relative to the conductor plate. During normal vehicle operation, the lateral forces acting on the conductor plate are minimal, requiring minimal mounting requirements and eliminating the need for dedicated sidewalls. By converting lateral vibrations between the magnetic wheels and the conductor plate into internal forces within drive system 2, lateral vibrations affecting vehicle body 1 are effectively filtered out. Consequently, magnetic wheel system 3 relies solely on the forces acting between the magnetic wheels to maintain symmetry relative to the conductor plate.

[0042] The drive system 2 is provided with at least two groups, each group of the drive system 2 is a rotating motor, and the drive system 2 drives the magnetic wheel system 3 to rotate.

[0043] It can be understood that the present invention ensures the stability of suspension by driving a magnetic wheel system 3 through a group of rotating motors.

[0044] The conductor plate in the guide rail structure 41 is made of a non-magnetic material with high conductivity.

[0045] It can be understood that the present invention improves driving efficiency by setting the conductor plate material to a non-magnetic high-conductivity material.

[0046] The upper surface of the conductor plate in the guide rail structure 41 is higher than the upper surface of the magnetic wheel system 3 , and the lower surface of the conductor plate in the guide rail structure 41 is lower than the lower surface of the magnetic wheel system 3 .

[0047] It is understandable that the present invention ensures that the magnetic wheel system can be stably excited by the two permanent magnetic wheels by setting the height of the conductor plate, thereby ensuring the driving effect of the dual-excitation magnetic wheel drive device.

[0048] The permanent magnetic wheels in the magnetic wheel system 3 are arranged in a ring structure of a Halbach periodic array, and the magnetization angle of the Halbach periodic array is set to be between 15° and 90°.

[0049] It can be understood that the present invention generates induced eddy currents on the conductor plate through the rotation of the permanent magnet wheel with an annular Halbach structure. The induced eddy currents form a mirror magnetic field in the opposite direction of the rotating magnetic field of the permanent magnet wheel, thereby driving the vehicle body to accelerate, maintain a constant speed, and decelerate.

[0050] The magnetic wheel system 3 and the guide rail structure 41 are set to 10mm-40mm.

[0051] It can be understood that in the present invention, the driving force generated by the interaction between the guide rail structure 41 and the magnetic wheel system 3 within this distance range is the largest, and the working efficiency is the highest.

[0052] The center lines of the magnetic wheel system 3 and the driving system 2 are located on the same straight line.

[0053] It can be understood that in the present invention, the center lines of the magnetic wheel system 3 and the drive system 2 are located on the same straight line, which ensures that the drive system 2 can stably drive the magnetic wheel system 3 to rotate and prevent the magnetic field from deviating.

[0054] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dual-excitation magnetic wheel drive device, characterized in that: include: Vehicle body (1); A track system (4), the track system (4) comprising a guide rail structure (41) and a track base (42), the track base (42) being arranged below the vehicle body (1), and the guide rail structure (41) being arranged between the vehicle body (1) and the track base (42); A magnetic wheel system (3), wherein the magnetic wheel system is provided with at least two groups, both groups of the magnetic wheel systems are provided between the vehicle body (1) and the track base (42), the two groups of the magnetic wheel systems (3) are symmetrically provided below the vehicle body along the guide rail structure (41), and a gap is provided between the magnetic wheel system (3) and the guide rail structure (41); A drive system (2) is provided between the track system (4) and the magnetic wheel system, and the drive system (2) is used to drive the magnetic wheel system (3) to rotate.

2. The dual-excitation magnetic wheel drive device according to claim 1, characterized in that: The guide rail structure (41) is a conductor plate. The guide rail structure (41) is arranged along the traveling direction of the vehicle body (1). The guide rail structure (41) and the rail base (42) are arranged perpendicular to each other.

3. The dual-excitation magnetic wheel drive device according to claim 1, characterized in that: The magnetic wheel system (3) comprises an inner yoke (31), a permanent magnet (32) and an outer yoke (33); the permanent magnet (32) is arranged between the vehicle body (1) and the track base (42); the inner yoke (31) is arranged on the outer side wall of the permanent magnet (32); and the outer yoke (33) is arranged on the inner side wall of the permanent magnet (32).

4. The dual-excitation magnetic wheel drive device according to claim 1, characterized in that: The magnetic poles of the magnetic wheel system (3) are arranged oppositely along the middle surface of the guide rail structure (41), and the two magnetic wheel systems (3) rotate in opposite directions and have the same size.

5. The dual-excitation magnetic wheel drive device according to claim 3, characterized in that: The drive system (2) is provided with at least two groups, each group of the drive system (2) is a rotating motor, and the drive system (2) drives the magnetic wheel system (3) to rotate.

6. The dual-excitation magnetic wheel drive device according to claim 2, characterized in that: The conductor plate material in the guide rail structure (41) is a non-magnetic high-conductivity material.

7. The dual-excitation magnetic wheel drive device according to claim 2, characterized in that: The upper surface of the conductor plate in the guide rail structure (41) is higher than the upper surface of the magnetic wheel system (3), and the lower surface of the conductor plate in the guide rail structure (41) is lower than the lower surface of the magnetic wheel system (3).

8. The dual-excitation magnetic wheel drive device according to claim 2, characterized in that: The arrangement of the permanent magnetic wheels in the magnetic wheel system (3) is set to a ring structure of a Halbach periodic array, and the magnetization angle of the Halbach periodic array is set to between 15° and 90°.

9. The dual-excitation magnetic wheel drive device according to claim 1, characterized in that: The distance between the magnetic wheel system (3) and the guide rail structure (41) is set to 10 mm to 40 mm.

10. The dual-excitation magnetic wheel drive device according to claim 1, characterized in that: The center lines of the magnetic wheel system (3) and the drive system (2) are located on the same straight line.

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