A method and device for generating a coil model

Abstract

The present application discloses a method and device for generating a coil model, which includes constructing a first coil; cutting the first coil perpendicular to the direction of current to obtain a first section and a second section of the first coil; setting the first section and the second section to be connected to a power supply, and setting the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit to obtain a coil model; the coil model is used to infer the electromagnetic force of a magnetic levitation system. By cutting the first coil to obtain a first section and a second section, and connecting the first section and the second section to a power supply, the connection state of the superconducting coil in the magnetic levitation system is simulated. The electromagnetic force of the magnetic levitation system inferred by the coil model provided in the embodiment of the present application has good accuracy, and the coil structure is relatively simple, and the calculation speed is relatively fast.

Description

Technical Field

[0001] The present application relates to the field of electromagnetics, and in particular to a method and device for generating a coil model. Background Art

[0002] The maglev system utilizes the relative motion between the onboard superconducting coils and the magnetic levitation track coils to generate an induced magnetic field. Like poles repel each other, while opposite poles attract each other, creating a levitation force that keeps the maglev train afloat. Specifically, the onboard superconducting magnets in the maglev train are subject to the combined forces of attraction from the upper portion of the magnetic levitation track and repulsion from the lower portion. The vertical component of the electromagnetic force levitates the vehicle, the lateral component guides the vehicle, and the component in the direction of motion provides magnetic resistance.

[0003] Currently, calculations of electromagnetic forces in magnetic levitation systems are typically based on numerical circuit levitation methods, which suffer from low accuracy and slow computation speed. Therefore, a coil model is urgently needed in the field to more accurately and easily infer electromagnetic forces in magnetic levitation systems. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides a method and device for generating a coil model for more accurately and conveniently inferring the electromagnetic force in a magnetic levitation system.

[0005] In order to achieve the above objectives, the technical solutions provided in the embodiments of the present application are as follows:

[0006] The present invention provides a method for generating a coil model, including:

[0007] Constructing a first coil, where the first coil is used to simulate an on-board superconducting coil in a magnetic levitation system;

[0008] cutting the first coil perpendicular to the current direction to obtain a first cross section and a second cross section of the first coil;

[0009] The first section and the second section are connected to a power supply, and the resistance of the first coil is set to be greater than the resistance of other components connected in series in the circuit, thereby obtaining a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0010] As a possible implementation manner, the distance between the first section and the second section is twice the minimum grid size of the coil model.

[0011] As a possible implementation, setting the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit includes:

[0012] The resistance of the first coil is set to a resistance greater than 500Ω.

[0013] As a possible implementation, the first section and the second section are connected to a power source, including:

[0014] The first section and the second section are arranged in a circuit arrangement to be connected to a power source.

[0015] As a possible implementation method, it also includes:

[0016] Construct the second and third coils;

[0017] Cutting the second coil perpendicularly to the current direction to obtain a third cross section and a fourth cross section of the second coil; cutting the third coil perpendicularly to the current direction to obtain a fifth cross section and a sixth cross section of the third coil;

[0018] Set the third section and the fifth section to be connected; set the fourth section and the sixth section to be connected;

[0019] The resistance of the second coil and the third coil is set to the actual resistance of the magnetic levitation track coil.

[0020] As a possible implementation, the distance between the third section and the fourth section is twice the minimum grid size of the coil model; the distance between the fifth section and the sixth section is twice the minimum grid size of the coil model.

[0021] As a possible implementation, the third section and the fifth section are connected; the fourth section and the sixth section are connected, including:

[0022] The third section and the fifth section are set to be connected in the circuit setting; the fourth section and the sixth section are set to be connected in the circuit setting.

[0023] As a possible implementation, the magnetic levitation track in the magnetic levitation system includes a plurality of second coils and a plurality of third coils, and the magnetic levitation train in the magnetic levitation system includes a plurality of first coils.

[0024] According to the method for generating a coil model provided above, an embodiment of the present application further provides an apparatus for generating a coil model, comprising:

[0025] A first construction module is used to construct a first coil, and the first coil is used to simulate an on-board superconducting coil in a magnetic levitation system;

[0026] a first cutting module, configured to cut the first coil in a direction perpendicular to the current flow to obtain a first cross section and a second cross section of the first coil;

[0027] The first setting module is used to set the first section and the second section to be connected to a power supply to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0028] As a possible implementation method, it also includes:

[0029] A second building block, configured to build a second coil and a third coil;

[0030] A second cutting module is used to cut the second coil perpendicular to the current direction to obtain a third section and a fourth section of the second coil; and to cut the third coil perpendicular to the current direction to obtain a fifth section and a sixth section of the third coil;

[0031] The second setting module is used to set the third section and the fifth section to be connected; set the fourth section and the sixth section to be connected to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0032] Through the above technical solution, it can be seen that this application has the following beneficial effects:

[0033] An embodiment of the present application provides a method for generating a coil model, including: constructing a first coil; cutting the first coil perpendicular to the direction of current to obtain a first section and a second section of the first coil; setting the first section and the second section to be connected to a power supply, and setting the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit, to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0034] It can be seen from this that the method for generating a coil model provided in the embodiment of the present application simulates the connection state of the superconducting coil in the magnetic levitation system by cutting the first coil to obtain the first section and the second section, and connecting the first section and the second section to the power supply. At the same time, the embodiment of the present application also sets the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit. Since the resistance of the first coil is greater than the resistance of other devices in the circuit, the current in the first coil is less affected by the change in the resistance of other devices in the circuit, so that the current in the first coil can always be maintained at a relatively stable value, which better simulates the constant current in the superconducting coil. In this way, the electromagnetic force of the magnetic levitation system obtained by inference of the coil model provided in the embodiment of the present application is more accurate, and the coil structure is relatively simple and the calculation speed is faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 A flow chart of a method for generating a coil model provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of an "8"-shaped coil model provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of a superconducting coil model provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of a coil model provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of a device for generating a coil model provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to help better understand the solution provided by the embodiments of the present application, before introducing the method provided by the embodiments of the present application, the application scenario of the solution of the embodiments of the present application is first introduced.

[0042] The maglev system utilizes the relative motion between the onboard superconducting coils and the magnetic levitation track coils to generate an induced magnetic field. Like poles repel each other, while opposite poles attract each other, creating a levitation force that allows the maglev train to levitate. Specifically, the onboard superconducting magnets in the maglev train are subject to the interaction force of the figure-eight coils mounted on the magnetic levitation track. This interaction force consists of an attractive force from the upper portion of the figure-eight coils and a repulsive force from the lower portion. The vertical component of the electromagnetic force levitates the vehicle, the lateral component guides the vehicle, and the component in the direction of motion provides magnetic resistance.

[0043] Currently, calculations of electromagnetic forces in magnetic levitation systems are typically based on numerical circuit levitation methods, which suffer from low accuracy and slow computation speed. Therefore, a coil model is urgently needed in the field to more accurately and easily infer electromagnetic forces in magnetic levitation systems.

[0044] An embodiment of the present application provides a method for generating a coil model, including: constructing a first coil; cutting the first coil perpendicular to the direction of current to obtain a first section and a second section of the first coil; setting the first section and the second section to be connected to a power supply, and setting the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit, to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0045] It can be seen from this that the method for generating a coil model provided in the embodiment of the present application simulates the connection state of the superconducting coil in the magnetic levitation system by cutting the first coil to obtain the first section and the second section, and connecting the first section and the second section to the power supply. At the same time, the embodiment of the present application also sets the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit. In this way, in the coil model implemented by the present application, since the resistance of the first coil is greater than the resistance of other components in the circuit, the current in the first coil is less affected by the resistance changes of other components in the circuit, so that the current in the first coil can always be maintained at a relatively stable value, which better simulates the constant current in the superconducting coil.

[0046] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] See also Figure 1 , this figure is a flow chart of a method for generating a coil model provided in an embodiment of the present application.

[0048] like Figure 1 As shown, the method for generating a coil model provided in an embodiment of the present application includes:

[0049] S101: Construct a first coil, where the first coil is used to simulate a superconducting coil in a magnetic levitation system.

[0050] S102: Cut the first coil perpendicular to the current direction to obtain a first cross section and a second cross section of the first coil.

[0051] S103: The first section and the second section are connected to a power supply, and the resistance of the first coil is set to be greater than the resistance of other components connected in series in the circuit, to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0052] To ensure a high degree of simulation of the superconducting coil model and a relatively simple process for calculating electromagnetic forces based on the superconducting coil model, the distance between the first and second sections of the first coil can be twice the minimum mesh size of the coil model. It should be understood that if the distance between the first and second sections is too large, the coil model will not be able to effectively simulate the onboard superconducting coil. If the distance between the first and second sections is less than twice the minimum mesh size of the coil model, the mesh size in the coil model will increase, causing computational divergence during the calculation process, which will slow down the calculation of the electromagnetic force.

[0053] It should be noted that in the embodiment of the present application, the resistance R of the first coil can be set to a huge resistance. The resistance R can be much larger than the resistance of other components in series in the circuit, but can be smaller than the air impedance. For example, the resistance of the first coil can be greater than 500Ω. In actual applications, the resistance R of the first coil can be related to the number of coil turns Nc in the model. Specifically, the resistance of the first coil can be related to the square of the number of coil turns Nc. 2 Proportional.

[0054] It should be understood that in actual magnetic levitation systems, the first coil is a superconducting coil with very low resistance. However, if the first coil provided in the embodiments of this application is set to a very low resistance, due to the sensitivity to calculation errors caused by the low resistance, small error voltages in the model will be reflected as large current fluctuations in the first coil. Therefore, the embodiments of this application simultaneously set a high resistance value and a high power supply voltage in the first coil, simulating the current in the superconducting coil while also stabilizing the current in the first coil.

[0055] Correspondingly, the voltage of the power supply connected to the first coil can be V=R*MMF / N c , MMF is the magnetomotive force of the first coil. In this way, the product of the current and the number of turns of the model coil can be guaranteed to be N c V / R = MMF. In practice, the first coil is a superconducting coil with no resistance, and the current within the coil is a constant value. To simulate a superconducting coil, the first coil in this embodiment has a large resistance and a large current. This ensures that even if there are other resistors in the circuit, the shunting effect of these other resistors is negligible, thus simulating a constant current in the superconducting coil.

[0056] In order to better understand the method for generating a coil model provided in an embodiment of the present application, it will be introduced below with reference to a schematic diagram of a coil.

[0057] See also Figure 2 , this figure is a schematic diagram of an “8”-shaped coil model provided in an embodiment of the present application.

[0058] like Figure 2 As shown, the coil model provided in the embodiment of the present application includes a second coil 100 and a third coil 200. The second coil is cut into a third section A and a fourth section B, and the third coil is cut into a fifth section A' and a sixth section B'. The third section A and the fifth section A' are connected; the fourth section B and the sixth section B' are connected.

[0059] It should be noted that, in the embodiment of the present application, the third section and the fifth section are set to be connected; the fourth section and the sixth section are set to be connected, including: setting the third section and the fifth section to be connected in the circuit setting; setting the fourth section and the sixth section to be connected in the circuit setting. In the process of generating the coil model, simulation software, such as COMSOL, can be used to set the circuit of the section in the coil, so that the closed-loop coil can simulate the electromagnetic force generated by the "8"-shaped coil. As a possible implementation method, the method provided in the embodiment of the present application also includes: setting the resistance of the second coil and the third coil to the actual resistance of the "8"-shaped coil in the magnetic levitation track coil. It should be noted that the embodiment of the present application does not limit the specific shapes of the second coil and the third coil, and the specific shapes of the second coil and the third coil can be set according to the "8"-shaped coil they simulate.

[0060] The method for generating a coil model provided in an embodiment of the present application connects the cross-section of the second coil and the cross-section of the third coil respectively, so that the electromagnetic force generated by the two coils is similar to the "8" coil in the magnetic levitation system. On the one hand, the embodiment of the present application simulates the complex structure of the "8" coil in the actual magnetic levitation system through the circuit setting of the coil, so that the electromagnetic force calculated by the model has better accuracy. On the other hand, the structure of the two basic coils is relatively simple, and the calculation process of the electromagnetic force inferred by the model is relatively simple, and the calculation speed is relatively fast. Therefore, the electromagnetic force of the magnetic levitation system inferred by the coil model provided in the embodiment of the present application has better accuracy, and the calculation process is relatively simple, and the calculation speed is relatively fast.

[0061] As a possible implementation, the distance between the third section and the fourth section is twice the minimum grid size of the coil model; the distance between the fifth section and the sixth section is twice the minimum grid size of the coil model. It should be noted that when the distance between the third section (fifth section) and the fourth section (sixth section) is twice the minimum grid size of the coil model, the coil model simulates the "8" coil at a high degree of simulation and the calculation process is relatively simple. If the distance between the third section (fifth section) and the fourth section (sixth section) is too large, the coil model cannot simulate the "8" coil in the magnetic levitation system well. If the distance between the third section (fifth section) and the fourth section (sixth section) is less than twice the minimum grid size of the coil model, the grid in the coil model will be increased, resulting in a problem of computational divergence during the calculation process, thereby slowing down the calculation of the electromagnetic force.

[0062] It should be noted that the "figure-eight" coils in a maglev system are typically laid on the maglev track, while superconducting coils are also installed on both sides of the maglev train. The force between the superconducting coils and the "figure-eight" coils causes the maglev train to levitate from the ground. To infer the electromagnetic forces in the maglev system, this embodiment of the application also simulates and models the superconducting coils on both sides of the maglev train.

[0063] The method for generating a coil model provided in an embodiment of the present application also includes: constructing a first coil; cutting the first coil perpendicular to the direction of current to obtain a first section and a second section of the first coil; and setting the first section and the second section to be connected to a power supply.

[0064] See also Figure 3 , which is a schematic diagram of a superconducting coil model provided in an embodiment of the present application.

[0065] like Figure 3 As shown, the superconducting coil model provided in the embodiment of the present application includes a first coil 300. The first coil 300 is cut into a first section C and a second section D. The first section C and the second section D are each configured to be connected to a power supply in the circuit configuration. It should be noted that the embodiment of the present application does not limit the specific shape of the first coil 300, and the specific shape of the first coil can be set according to the superconducting coil it simulates.

[0066] As a possible implementation, a metal shell layer can be placed over the first coil, with its thickness and conductivity adjusted to actual conditions, to simulate the metal shell layer surrounding the superconducting coil in a magnetic levitation system. The shell layer near the first coil can be used to calculate the current flowing in the metal shell in the magnetic levitation system, as well as the electromagnetic force acting on the superconducting magnet.

[0067] See also Figure 4 , which is a schematic diagram of a coil model provided in an embodiment of the present application.

[0068] like Figure 4 As shown, the coil model provided in the embodiment of the present application includes an "8"-shaped coil layer composed of a second coil 100 and a third coil 200, and a superconducting coil layer composed of a first coil 300.

[0069] Specifically, the coil model in the embodiment of the present application includes multiple second coils 100 and multiple third coils 200, wherein the second coils 100 are connected to their corresponding third coils 200 through cross sections to form an "8" coil. The multiple "8" coils are arranged to simulate the "8" coils installed on the magnetic levitation track in the magnetic levitation system. The coil model also includes multiple first coils 300, and the multiple first coils are arranged on the "8" coil to simulate the superconducting coils of the magnetic levitation train in the magnetic levitation system.

[0070] In summary, the method for generating a coil model provided in the embodiment of the present application, on the one hand, connects the cross-section of the second coil and the cross-section of the third coil respectively, so that the electromagnetic force generated by the two coils is similar to the "8" coil in the magnetic levitation system. In this way, the second coil and the third coil provided in the embodiment of the present application are relatively simple in structure based on the simulation of the "8" coil. On the other hand, by setting the resistance and voltage of the first coil to larger values, a stable current is maintained in the first coil, thereby simulating the superconducting coil in the magnetic levitation system. It can be seen from this that the electromagnetic force of the magnetic levitation system inferred by the coil model provided in the embodiment of the present application is more accurate, and the calculation process is relatively simple and the calculation speed is faster.

[0071] According to the method for generating a coil model provided in the above embodiment, an embodiment of the present application further provides a device for generating a coil model.

[0072] See also Figure 5 , which is a schematic diagram of a device for generating a coil model provided in an embodiment of the present application.

[0073] like Figure 5 As shown, the device for generating a coil model provided in an embodiment of the present application includes:

[0074] A first construction module 100 is used to construct a first coil, which is used to simulate an on-board superconducting coil in a magnetic levitation system;

[0075] A first cutting module 200 is used to cut the first coil in a direction perpendicular to the current flow to obtain a first cross section and a second cross section of the first coil;

[0076] The first setting module 300 is used to set the first section and the second section to be connected to a power supply to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

[0077] It can be seen from this that the method for generating a coil model provided in the embodiment of the present application simulates the connection state of the superconducting coil in the magnetic levitation system by cutting the first coil to obtain the first section and the second section, and connecting the first section and the second section to the power supply. At the same time, the embodiment of the present application also sets the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit. Since the resistance of the first coil is greater than the resistance of other devices in the circuit, the current in the first coil is less affected by the change in the resistance of other devices in the circuit, so that the current in the first coil can always be maintained at a relatively stable value, which better simulates the constant current in the superconducting coil. In this way, the electromagnetic force of the magnetic levitation system obtained by inference of the coil model provided in the embodiment of the present application has good accuracy, and the calculation process is relatively simple and the calculation speed is relatively fast.

[0078] Through the description of the above embodiments, it can be seen that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the methods described in each embodiment of the present application or certain parts of the embodiments.

[0079] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. The methods disclosed in the embodiments are described briefly because they correspond to the systems disclosed in the embodiments. For relevant details, refer to the description of the systems.

[0080] It should also be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0081] The above description of the disclosed embodiments will enable those skilled in the art to implement or use various modifications of these embodiments, and it will be apparent to those skilled in the art that the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for generating a coil model, characterized in that: include: constructing a first coil, wherein the first coil is used to simulate an on-board superconducting coil in a magnetic levitation system; cutting the first coil perpendicular to the current direction to obtain a first cross section and a second cross section of the first coil, wherein the distance between the first cross section and the second cross section is twice the minimum grid size of the coil model; The first section and the second section are connected to a power supply, and the resistance of the first coil is set to be greater than the resistance of other components connected in series in the circuit, thereby obtaining a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system; Setting the resistance of the first coil to be greater than the resistance of other components connected in series in the circuit includes: setting the resistance of the first coil to be greater than 500Ω.

2. The method according to claim 1, characterized in that Also includes: Construct the second and third coils; cutting the second coil in a direction perpendicular to the current flow to obtain a third cross section and a fourth cross section of the second coil; cutting the third coil in a direction perpendicular to the current flow to obtain a fifth cross section and a sixth cross section of the third coil; The third section and the fifth section are connected; the fourth section and the sixth section are connected; The resistance of the second coil and the third coil is set to the actual resistance of the magnetic levitation track coil.

3. The method according to claim 2, characterized in that The distance between the third section and the fourth section is twice the minimum grid size of the coil model; the distance between the fifth section and the sixth section is twice the minimum grid size of the coil model.

4. The method according to claim 2, characterized in that Said third section and said fifth section are arranged to be connected; Setting the fourth section and the sixth section to be connected comprises: Setting the third section and the fifth section to be connected in a circuit setting; The fourth section and the sixth section are connected in a circuit setting.

5. The method according to claim 2, characterized in that The magnetic levitation track in the magnetic levitation system includes a plurality of the second coils and a plurality of the third coils, and the magnetic levitation train in the magnetic levitation system includes a plurality of the first coils.

6. A device for generating a coil model, characterized in that: include: A first construction module is used to construct a first coil, wherein the first coil is used to simulate an on-board superconducting coil in a magnetic levitation system; a first cutting module, configured to cut the first coil in a direction perpendicular to the current flow to obtain a first section and a second section of the first coil, wherein the distance between the first section and the second section is twice the minimum grid size of the coil model; A first setting module is configured to connect the first section and the second section to a power source to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system; The first setting module is used to set the resistance of the first coil to a resistance greater than 500Ω.

7. The device according to claim 6, characterized in that Also includes: A second building block, configured to build a second coil and a third coil; a second cutting module, configured to cut the second coil perpendicular to the current direction to obtain a third section and a fourth section of the second coil; and to cut the third coil perpendicular to the current direction to obtain a fifth section and a sixth section of the third coil; A second setting module is used to set the third section and the fifth section to be connected; The fourth section and the sixth section are connected to obtain a coil model; the coil model is used to infer the electromagnetic force of the magnetic levitation system.

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