Magnetic levitation magnetic pole, method and device for adjusting coil current of magnetic levitation magnetic pole, and medium

Abstract

The application discloses a magnetic suspension magnetic pole, a coil current adjustment method and device of the magnetic suspension magnetic pole and a medium, and is applied to the technical field of magnetic suspension motors. The magnetic suspension magnetic pole comprises a direct-current excitation coil, an alternating-current excitation coil with adjustable current and a controller. The controller is used for monitoring the state of the magnetic suspension train to obtain the suspension force change condition of the magnetic suspension train during the operation of the magnetic suspension train, and adjusting the current of the alternating-current excitation coil according to the suspension force change condition of the magnetic suspension train. Therefore, the dynamic response capability of the excitation coil in the scheme is only related to the electrical constant of the alternating-current excitation coil, the suspension force provided by the alternating-current excitation coil is smaller, the number of turns and the current of the alternating-current excitation coil are lower, the electrical constant is smaller than that of the single coil in the original scheme, and the dynamic response capability is improved. In addition, after the current and the number of turns of the two coils are determined through calculation, the magnetic pole power consumption near the working point of the magnetic suspension magnetic pole can be reduced, so that the magnetic pole heating and temperature rise are reduced.

Description

Technical Field

[0001] This application relates to the field of magnetic levitation motor technology, and in particular to a magnetic levitation pole, a method, device and medium for adjusting the coil current of the magnetic levitation pole. Background Technology

[0002] Maglev trains are a new type of rail transportation vehicle with outstanding features such as low operating noise, strong climbing ability, small turning radius, high safety and reliability, low operating and maintenance costs, and low construction costs. They utilize electromagnetic attraction to levitate the train body above the track, maintaining a contactless relationship between the train and the track, overcoming contact wear and reducing running resistance. After decades of technological development, maglev train technology has matured and is gradually moving towards commercial production and operation. Maglev trains are levitated by conventional high-speed maglev poles, which typically consist of an excitation coil, an iron core, and a magnetic yoke.

[0003] However, if a normal-conducting high-speed magnetic levitation pole has only one DC excitation coil, its electrical constant is relatively large, resulting in poor dynamic response capability and high power consumption.

[0004] Therefore, improving the dynamic response capability and reducing power consumption of conventional high-speed magnetic levitation poles are problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a magnetic levitation pole, a method, device, and medium for adjusting the coil current of the magnetic levitation pole, so as to solve the problems of poor dynamic response capability and high power consumption of the current magnetic levitation pole.

[0006] To solve the above-mentioned technical problems, this application provides a magnetic levitation pole, including a DC excitation coil, an AC excitation coil with adjustable current, and a controller;

[0007] The number of turns and current of the DC excitation coil and the AC excitation coil are determined according to the performance requirements of the magnetic poles and the initial levitation force requirements of the magnetic levitation train. The performance requirements include at least one of the power requirements and the dynamic response capability requirements.

[0008] The controller is used to monitor the status of the maglev train during operation to obtain the change in the levitation force of the maglev train, and adjust the current of the AC excitation coil according to the change in the levitation force of the maglev train.

[0009] To address the aforementioned technical problems, this application also provides a method for adjusting the coil current of a maglev pole, applied to a controller for the maglev pole. The maglev pole further includes a DC excitation coil and an AC excitation coil with adjustable current. The number of turns and current of the DC and AC excitation coils are determined based on the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train. The performance requirements include at least one of power requirements and dynamic response capability requirements. The method includes:

[0010] During the operation of the maglev train, the status of the maglev train is monitored;

[0011] The changes in the levitation force of the maglev train are obtained;

[0012] Adjust the current of the AC excitation coil according to the changes in the levitation force.

[0013] Preferably, determining the number of turns and current of the DC excitation coil and the AC excitation coil based on the performance requirements and the initial levitation force requirements includes:

[0014] The initial number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements.

[0015] A finite element model of the magnetic levitation poles is constructed based on the number of turns and current of the DC excitation coil and the AC excitation coil.

[0016] The current performance parameters and levitation force of the magnetic levitation poles are obtained by electromagnetic field calculation using a finite element model.

[0017] Adjust the number of turns and current of the DC excitation coil and the AC excitation coil according to the current performance parameter values ​​and levitation force of the magnetic levitation pole, as well as the performance requirements and the initial levitation force requirements. Then return to the step of building the finite element model of the magnetic levitation pole according to the number of turns and current of the DC excitation coil and the AC excitation coil, until the number of turns and current that meet the performance requirements and the initial levitation force requirements are obtained.

[0018] Preferably, determining the number of turns and current of the DC excitation coil and the AC excitation coil based on the performance requirements and the initial levitation force requirements includes:

[0019] The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements, the initial levitation force requirements, and the temperature rise of the magnetic levitation poles.

[0020] Preferably, determining the number of turns and current of the DC excitation coil and the AC excitation coil based on the performance requirements, the initial levitation force requirements, and the temperature rise of the magnetic levitation poles includes:

[0021] The initial number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements.

[0022] A finite element model of the magnetic levitation poles is constructed based on the number of turns and current of the DC excitation coil and the AC excitation coil.

[0023] The current performance parameters and levitation force of the magnetic levitation pole are obtained by electromagnetic field calculation using a finite element model, and the temperature rise of the magnetic levitation pole is obtained by electromagnetic field-thermal field coupling calculation using a finite element model.

[0024] Based on the current performance parameters and levitation force of the magnetic levitation pole, the performance requirements, the initial levitation force requirements, and the temperature rise, adjust the number of turns and current of the DC excitation coil and the AC excitation coil, and return to the step of building the finite element model of the magnetic levitation pole based on the number of turns and current of the DC excitation coil and the AC excitation coil, until the number of turns and current that meet the performance requirements and the initial levitation force requirements under the temperature rise are obtained.

[0025] Preferably, the performance requirements include at least the dynamic response capability requirements; the dynamic response capability is obtained based on the electrical constant of the magnetic levitation poles.

[0026] Preferably, determining the number of turns and current of the DC excitation coil and the AC excitation coil based on the dynamic response capability requirements and the initial levitation force requirements of the magnetic levitation poles includes:

[0027] Determine the original electrical constants corresponding to the number of turns and current when a single coil provides the initial levitation force;

[0028] Adjust the number of turns and current of the DC excitation coil and the AC excitation coil so that the electrical constant corresponding to the number of turns and current of the AC excitation coil is less than the original electrical constant.

[0029] Preferably, the performance requirements include at least the power requirements;

[0030] The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the power requirements of the magnetic levitation poles and the initial levitation force requirements, including:

[0031] Determine the original power corresponding to the number of turns and current when a single coil provides the initial levitation force;

[0032] Adjust the number of turns and current of the DC excitation coil and the AC excitation coil so that the sum of the power of the DC excitation coil and the AC excitation coil is less than the original power.

[0033] Preferably, the power requirement is specifically the minimum excitation power of the magnetic levitation poles.

[0034] Preferably, the number of both the DC excitation coil and the AC excitation coil is one.

[0035] To address the aforementioned technical problems, this application also provides a device for adjusting the coil current of a maglev pole, applied to a controller for the maglev pole. The maglev pole further includes a DC excitation coil and an AC excitation coil with adjustable current. The number of turns and current of the DC and AC excitation coils are determined based on the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train. The performance requirements include at least one of power requirements and dynamic response capability requirements. The device includes:

[0036] The monitoring module is used to monitor the status of the maglev train during its operation.

[0037] The acquisition module is used to acquire the levitation force change status of the maglev train;

[0038] An adjustment module is used to adjust the current of the AC excitation coil according to the changes in the levitation force.

[0039] To solve the above-mentioned technical problems, this application also provides a device for adjusting the coil current of a magnetic levitation pole, including: a memory for storing a computer program;

[0040] A processor is used to implement the steps of the above-described method for adjusting the coil current of the magnetic levitation poles when executing a computer program.

[0041] To address the aforementioned technical problems, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described method for adjusting the coil current of the magnetic levitation poles.

[0042] This application provides a maglev pole, which includes a DC excitation coil, an adjustable AC excitation coil, and a controller. The number of turns and current of both the DC and AC excitation coils are determined based on the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train. These performance requirements include at least one of power requirements and dynamic response capability requirements. The controller monitors the maglev train's status during operation to obtain changes in its levitation force and adjusts the current of the AC excitation coil accordingly. Compared to previous solutions, this approach adds an adjustable AC excitation coil, and since the DC excitation coil uses a DC power supply, adjusting the current of the AC excitation coil does not affect the DC excitation coil. Furthermore, the DC excitation coil provides the rated levitation force without adjustment, thus reducing the requirements for the DC excitation coil. Furthermore, since this scheme only requires adjusting the AC excitation coil, the dynamic response capability of the excitation coil is only related to its electrical constant. The AC excitation coil provides dynamically adjustable levitation force, which is relatively small. Therefore, the number of turns and current of the AC excitation coil are lower, and its electrical constant is smaller than that of a single coil in the original scheme, thus improving the dynamic response capability. In addition, after calculating and determining the current and number of turns of the two coils, the power consumption of the magnetic poles near the operating point of the magnetic levitation poles can be reduced, thereby reducing pole heating and temperature rise to meet power consumption requirements.

[0043] This application also provides a method, apparatus, and computer-readable storage medium for adjusting the coil current of a magnetic levitation pole, which corresponds to the above method and therefore has the same beneficial effects as the above magnetic levitation pole. Attached Figure Description

[0044] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 A schematic diagram of a power supply circuit for a normally conducting high-speed magnetic levitation pole coil provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the structure of a normally conducting high-speed magnetic levitation pole provided in an embodiment of this application;

[0047] Figure 3 A flowchart illustrating a method for adjusting the coil current of a magnetic levitation pole, provided in an embodiment of this application;

[0048] Figure 4 A structural diagram of the coil current adjustment device for the magnetic levitation poles provided in the embodiments of this application;

[0049] Figure 5 A structural diagram of a device for adjusting the coil current of a magnetic levitation pole, provided in another embodiment of this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0051] The core of this application is to provide a magnetic levitation pole, a method, device, and medium for adjusting the coil current of the magnetic levitation pole, so as to solve the problems of poor dynamic response capability and high power consumption of the current magnetic levitation pole.

[0052] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Currently, the highest operating speed of high-speed maglev trains reaches 503 km / h. Ultra-high-speed operation requires maglev trains to have even faster response speeds for their levitation electromagnets. The dynamic response speed of high-speed maglev poles is directly related to their electrical constant; an increase in the electrical constant slows down the dynamic response speed. The electrical constant is related to the inductance and resistance of the pole windings; it is directly proportional to inductance and inversely proportional to resistance. Therefore, improving the dynamic response speed requires reducing the electrical constant, which necessitates reducing inductance and increasing resistance. Inductance is directly proportional to the square of the number of turns in the winding, and resistance is also directly proportional to the number of turns. Reducing the number of turns in the pole is one way to lower the electrical constant and improve the response speed. Currently, high-speed maglev poles use DC excitation, resulting in a large number of turns, a relatively large electrical constant, and a slow dynamic response speed, making it unsuitable for higher-speed operation. Furthermore, pole power consumption is related to the excitation current and the number of turns in the pole windings. Current high-speed maglev poles have relatively large currents and a large number of turns, leading to high power consumption, severe pole heating, and high temperature rise, which affects the pole's performance.

[0054] To address the aforementioned technical problems, this application provides a maglev pole, which includes a DC excitation coil, an adjustable AC excitation coil, and a controller. The number of turns and current of the DC and AC excitation coils are determined based on the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train. The performance requirements include at least one of power requirements and dynamic response capability requirements. The controller monitors the state of the maglev train during operation to obtain changes in its levitation force, and adjusts the current of the AC excitation coil according to these changes.

[0055] Figure 1 This application provides a schematic diagram of a power supply circuit structure for a normally conducting high-speed magnetic levitation pole coil, as shown in the embodiments of this application. Figure 1 As shown, the DC excitation coil 1 of the magnetic levitation pole 5 is powered by the DC power supply 3, and the AC excitation coil 2 is connected to the suspension controller 4 (i.e., the controller), which can adjust the current in real time and dynamically adjust the levitation force. Figure 2 This application provides a schematic diagram of the structure of a normally conducting high-speed magnetic levitation pole; as shown in the embodiment. Figure 2 As shown, the conventional high-speed maglev pole consists of excitation coils (DC excitation coil 1 and AC excitation coil 2), a magnetic yoke 6, and an iron core 7. Each conventional pole contains an independent DC excitation coil 1 and an adjustable current AC excitation coil 2. Adjacent conventional poles are connected by the magnetic yoke to form corresponding magnetic field loops. The DC excitation coil 1 generates a DC current under a stable voltage signal and produces a stable magnetic field based on this current. The AC excitation coil 2 adjusts the magnetic field generated by the DC excitation coil 1, regulating the magnitude and direction of the current in the AC excitation coil according to changes in external excitation, thereby dynamically adjusting the levitation force and generating a stable magnetic field. This scheme achieves rapid response and low power consumption of the conventional high-speed maglev pole to excitation and external excitation by optimizing the excitation control strategy and turns allocation scheme of the DC and AC excitation coils.

[0056] The coil of the maglev pole in this application specifically consists of a DC excitation coil and an AC excitation coil with adjustable current. The DC excitation coil uses a DC power supply, and its current does not have a rapid decrease function. The current of the AC excitation coil is adjustable, and adjusting the current of the AC excitation coil will not affect the DC excitation coil. Furthermore, the DC excitation coil provides the rated levitation force, which is the main levitation force of the maglev train, but it does not require adjustment; therefore, the requirements for the DC excitation coil are relatively low. The AC excitation coil provides dynamically adjustable levitation force, which, although requiring adjustment, is relatively small, thus also placing lower demands on the AC excitation coil. Therefore, the number of turns and current of the DC and AC excitation coils can be determined according to performance requirements and initial levitation force requirements, reducing the power consumption of the maglev pole and improving dynamic response capability.

[0057] The design scheme for the number of turns and current is described below with specific implementation details. This scheme achieves high dynamic response of the high-speed maglev pole by setting DC excitation coils and AC excitation coils in the teeth of the high-speed maglev pole and applying different excitation control strategies to the DC excitation coils and AC excitation coils.

[0058] First, based on the levitation force requirements and excitation power limitations, calculate the excitation magnetomotive force, the number of turns in the excitation coil, and the excitation current. Then, based on the levitation force requirements and the number of levitation poles, calculate the levitation force required for each pole.

[0059]

[0060] Where f is the average levitation force required for each magnetic pole, G is the levitation force required for all magnetic poles, and M is the number of magnetic poles. The relationship between the levitation force required for each magnetic pole and the magnetic induction intensity B and the cross-sectional area A of the magnetic pole core satisfies:

[0061]

[0062] Where μ0 is the air permeability, and when the cross-sectional area A of the magnetic pole core is constant, the levitation force required by the magnetic pole depends only on the magnetic induction intensity B. The relationship between magnetic induction intensity and excitation magnetomotive force is as follows:

[0063]

[0064] Where H is the magnetic field strength, and F is... m The magnetomotive force is δ, the air gap is μ0, and the air permeability is 4 × 10⁻⁶. -7 H / m. The magnitude of the excitation magnetomotive force is the sum of the number of turns N and the excitation current I. m The product of:

[0065] F m =N·I m (4)

[0066] Due to the maximum excitation power P max Due to limitations, the excitation current cannot be infinitely large; therefore:

[0067] I m ·U≤P max (5)

[0068] U is the voltage across the coil.

[0069] Then, adjust the number of turns and current of the DC excitation coil and AC excitation coil according to the excitation power requirement (generally to be minimized) and dynamic response capability requirements, while ensuring the electromagnetic force (levitation force) remains constant. In the formulas below, the subscript 1 for each parameter indicates that the parameter corresponds to a single excitation coil in the original scheme; subscript A indicates that the parameter corresponds to the DC excitation coil; and subscript B indicates that the parameter corresponds to the AC excitation coil.

[0070] According to formula (2), in order to ensure the constant electromagnetic force, the magnetic induction intensity B must be constant. According to formula (3), the constant magnetic induction intensity B requires the excitation magnetomotive force F to be constant. m The constant excitation magnetomotive force F m The calculation method is as follows:

[0071] Fm =F mA +F mB (6)

[0072] That is N·I m =N A ·I mA +N B ·I mB (7)

[0073] The excitation power P satisfies:

[0074]

[0075] Where ρ is the resistivity of the magnetic pole coil winding, which is related to the material of the magnetic pole coil winding.

[0076] By adjusting the number of turns and current of the DC excitation coil and the AC excitation coil, P1 ≥ P A +P B That is, the sum of the excitation power of the two coils provided in this application embodiment is less than the excitation power of the original single coil. The calculation formula is as follows:

[0077]

[0078] Dynamic response capability is closely related to the electrical constant τ, the magnitude of which is related to the inductance and resistance of the magnetic pole coil winding, i.e.:

[0079]

[0080] Where L is the inductance of the pole winding and R is the resistance of the pole winding. The relationship between the inductance and the number of turns of the pole winding satisfies:

[0081] L=N 2 L0 (11)

[0082] Where L0 is the average inductance of a single-turn coil, and N is the number of turns in the pole winding. The relationship between the number of turns in the pole winding and the inductance of the pole winding satisfies:

[0083]

[0084] Where ρ is the resistivity of the magnetic pole coil winding, S is the cross-sectional area of ​​the magnetic pole coil winding, and L e L is the length of the magnetic pole coil winding. e0 Let be the average length of one turn of the coil. Therefore, the electrical constant is:

[0085]

[0086] To increase the response speed of a magnetic pole, τ1 > τ BSince this scheme only requires adjusting the AC excitation coil, the electrical constant of the excitation coil in this scheme is equal to the electrical constant τ of the AC excitation coil. B This makes the electrical constant τ of the AC excitation coil... B It should be less than the electrical constant τ1 of a single excitation coil in the original scheme.

[0087] Based on the above analysis, the range of variation of the current and number of turns of the DC excitation coil and AC excitation coil is obtained. The current and number of turns of the DC excitation coil and AC excitation coil are allocated. The current and number of turns of the DC excitation coil and AC excitation coil after the allocation are lower than the current and number of turns, but the sum of the number of turns of the DC excitation coil and AC excitation coil is slightly larger than the current number of turns of the magnetic pole coil. Due to the limitation of magnetic pole spacing, the conductor cross-sectional area remains unchanged. The resistance increases slightly because the sum of the DC and AC turns is slightly larger than the current number of turns. However, due to the reduction of excitation current, the power consumption is reduced and the response speed is improved. The dynamic response capability meets the requirements.

[0088] Furthermore, in practical applications, temperature rise must also be considered. By verifying the pole levitation force, temperature rise, and excitation power consumption, the turn allocation and current distribution can be optimized. Based on the allocated current and number of turns of the DC and AC excitation coils, the levitation force and excitation power consumption of the DC and AC excitation coils are calculated. Then, a finite element model of the high-speed magnetic levitation pole is built, and the levitation force and excitation power consumption of the pole are calculated using electromagnetic fields. The temperature rise of the pole is calculated using electromagnetic field-thermal field coupling. Based on the calculation results, the current and number of turns of the DC and AC excitation coils are optimized and adjusted to reduce excitation power and enhance dynamic response capability while ensuring a constant levitation force.

[0089] As can be seen, the high-speed maglev pole design method provided in this application involves several steps. First, the excitation magnetomotive force, the number of turns in the excitation coil, and the excitation current are calculated according to the levitation force requirements and excitation power limitations. Then, the number of turns and current of the DC and AC excitation coils are adjusted according to the minimum excitation power and dynamic response capability requirements, while ensuring a constant electromagnetic force. Furthermore, the pole levitation force, temperature rise, and excitation power consumption can be checked based on the designed current and number of turns, and the turn allocation and current allocation can be optimized. The DC and AC excitation coils are powered separately. The DC excitation coil winding is powered by a DC power supply, and the current does not have a rapid decrease function. The AC excitation coil winding is connected to the levitation controller, and the energizing current is adjusted in real time according to the external excitation to dynamically adjust the levitation force.

[0090] This solution provides a design method for high-response, low-power, normally-conducting, high-speed magnetic levitation poles. By optimizing the excitation control strategies and turn allocation schemes of the DC and AC excitation coils, the inductance-to-resistance ratio of the regulating coils can be effectively reduced, decreasing the electrical constant and improving the response speed of the high-speed magnetic levitation poles. While improving the response speed, adjusting the current in the AC excitation coil can enhance the stability of the magnetic field strength, reducing abrupt changes in electromagnetic force and disturbances to other systems. By changing the excitation control strategies and turn allocation schemes of the DC and AC excitation coils, the power consumption of the poles near the operating point can be reduced, thereby reducing pole heating and temperature rise, and improving the pole's operating performance.

[0091] This application provides a maglev pole, which includes a DC excitation coil, an adjustable AC excitation coil, and a controller. The number of turns and current of the DC and AC excitation coils are determined based on the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train. Performance requirements include at least one of power requirements and dynamic response capability requirements. The controller monitors the state of the maglev train during operation to obtain changes in its levitation force and adjusts the current of the AC excitation coil accordingly. Compared to previous solutions, this approach adds an adjustable AC excitation coil, and since the DC excitation coil uses a DC power supply, adjusting the current of the AC excitation coil does not affect the DC excitation coil. Furthermore, the DC excitation coil provides the rated levitation force and does not require adjustment, thus reducing the requirements for the DC excitation coil. Furthermore, since this scheme only requires adjusting the AC excitation coil, the dynamic response capability of the excitation coil is only related to its electrical constant. The AC excitation coil provides dynamically adjustable levitation force, which is relatively small. Therefore, the number of turns and current of the AC excitation coil are lower, and its electrical constant is smaller than that of a single coil in the original scheme, thus improving the dynamic response capability. In addition, after calculating and determining the current and number of turns of the two coils, the power consumption of the magnetic poles near the operating point of the magnetic levitation poles can be reduced, thereby reducing pole heating and temperature rise to meet power consumption requirements.

[0092] In addition, to solve the above-mentioned technical problems, this application embodiment also provides a method for adjusting the coil current of a magnetic levitation pole, which is applied to the controller of the magnetic levitation pole. The magnetic levitation pole also includes a DC excitation coil and an AC excitation coil with adjustable current. The number of turns and current of the DC excitation coil and the AC excitation coil are determined according to the performance requirements of the magnetic levitation pole and the initial levitation force requirements of the magnetic levitation train. The performance requirements include at least one of power requirements and dynamic response capability requirements. Figure 3 A flowchart illustrating a method for adjusting the coil current of a magnetic levitation pole, as provided in this application embodiment; Figure 3 As shown, the method includes the following steps:

[0093] S10: Monitor the status of the maglev train during operation.

[0094] S11: Obtain the levitation force change status of the maglev train.

[0095] S12: Adjust the current of the AC excitation coil according to the changes in levitation force.

[0096] The above embodiments do not specify how to determine the number of turns and current of the two coils. In practical applications, it is difficult to determine the number of turns and current of the coils at once. This application provides a solution as follows: The initial number of turns and current of the DC excitation coil and AC excitation coil are determined based on performance requirements and initial levitation force requirements; a finite element model of the maglev pole is constructed based on the number of turns and current of the DC excitation coil and AC excitation coil; electromagnetic field calculations are performed using the finite element model to obtain the current performance parameter values ​​and levitation force of the maglev pole; the number of turns and current of the DC excitation coil and AC excitation coil are adjusted based on the current performance parameter values ​​and levitation force of the maglev pole, as well as the performance requirements and initial levitation force requirements; and the process of constructing the finite element model of the maglev pole based on the number of turns and current of the DC excitation coil and AC excitation coil is repeated until the number of turns and current that meet the performance requirements and initial levitation force requirements are obtained. It can be seen that the solution provided by this application, through continuous iterative optimization, ultimately yields a number of turns and current that further meets the performance requirements.

[0097] Furthermore, in practical applications, the temperature rises after the magnetic levitation poles are energized. Therefore, determining the number of turns and current of the DC excitation coil and AC excitation coil based on performance requirements and initial levitation force requirements includes determining the number of turns and current of the DC excitation coil and AC excitation coil based on performance requirements, initial levitation force requirements, and the temperature rise of the magnetic levitation poles. Based on the iterative optimization approach described above, the specific steps for determining the number of turns and current are as follows: First, determine the initial number of turns and current of the DC excitation coil and AC excitation coil according to performance requirements and initial levitation force requirements. Second, construct a finite element model of the maglev pole based on the number of turns and current of the DC and AC excitation coils. Third, perform electromagnetic field calculations using the finite element model to obtain the current performance parameters and levitation force of the maglev pole, and perform electromagnetic field-thermal field coupling calculations using the finite element model to obtain the temperature rise of the maglev pole. Fourth, adjust the number of turns and current of the DC and AC excitation coils based on the current performance parameters and levitation force of the maglev pole, performance requirements, initial levitation force requirements, and temperature rise. Finally, return to the steps of constructing the finite element model of the maglev pole based on the number of turns and current of the DC and AC excitation coils, until the number of turns and current that meet the performance requirements and initial levitation force requirements under temperature rise conditions are obtained. The solution provided in this application embodiment makes the final number of turns and current more suitable for practical use.

[0098] In practical applications, the number of DC excitation coils and AC excitation coils is not limited; generally, there is one DC excitation coil and one AC excitation coil. Furthermore, as mentioned in the above embodiments, performance requirements may include dynamic response capability and power requirements. Two schemes for determining the number of coil turns and current are provided below.

[0099] Firstly, when performance requirements include dynamic response capability, the dynamic response capability can generally be determined based on the electrical constant of the magnetic levitation pole. The electrical constant can be calculated from the number of turns and current of the coil. Therefore, the specific method for determining the number of turns and current of the DC excitation coil and AC excitation coil based on the dynamic response capability requirements and initial levitation force requirements of the magnetic levitation pole is as follows: First, determine the original electrical constant corresponding to the number of turns and current of a single coil when providing the initial levitation force. Then, adjust the number of turns and current of the DC excitation coil and AC excitation coil so that the electrical constant corresponding to the number of turns and current of the AC excitation coil is less than the original electrical constant.

[0100] Secondly, when performance requirements include power requirements, the specific method for determining the number of turns and current of the DC excitation coil and AC excitation coil based on the power requirements of the magnetic levitation poles and the initial levitation force requirements is as follows: First, determine the original power corresponding to the number of turns and current of a single coil providing the initial levitation force. Then, adjust the number of turns and current of the DC excitation coil and AC excitation coil so that the sum of the power of the DC excitation coil and AC excitation coil is less than the original power. It can be seen that, by comparing the power consumption and electrical constants corresponding to the two coils of this application with the power consumption and electrical constants corresponding to a single coil in the original scheme, and adjusting the number of turns and current of the two coils, the dynamic response capability of the two coils in this application is better than that of the original scheme, and the power consumption is lower. Furthermore, in practical applications, the power requirement can also be set to the minimum excitation power of the magnetic levitation poles, and the minimum power consumption can be achieved by determining the number of turns and current of the two coils.

[0101] In the above embodiments, the method for adjusting the coil current of the magnetic levitation poles has been described in detail. This application also provides embodiments corresponding to the device for adjusting the coil current of the magnetic levitation poles. It should be noted that this application describes the embodiments of the device from two perspectives: one based on functional modules and the other based on hardware.

[0102] From the perspective of functional modules, this embodiment provides a device for adjusting the coil current of a maglev pole, which is applied to the controller of the maglev pole. The maglev pole also includes a DC excitation coil and an AC excitation coil with adjustable current. The number of turns and current of the DC excitation coil and the AC excitation coil are determined according to the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train. The performance requirements include at least one of power requirements and dynamic response capability requirements. Figure 4A structural diagram of the coil current adjustment device for the magnetic levitation poles provided in the embodiments of this application is shown below. Figure 4 As shown, the device includes:

[0103] The monitoring module 10 is used to monitor the status of the maglev train during its operation.

[0104] Module 11 is used to acquire the changes in the levitation force of the maglev train;

[0105] Adjustment module 12 is used to adjust the current of the AC excitation coil according to the change in levitation force.

[0106] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0107] As a preferred embodiment, the device for adjusting the coil current of the maglev pole further includes: a monitoring module, used to monitor the changes in the levitation force of the maglev train during operation after determining the number of turns and current of the DC excitation coil and the AC excitation coil according to performance requirements and initial levitation force requirements.

[0108] The adjustment module is used to adjust the current of the AC excitation coil according to the changes in the levitation force of the maglev train.

[0109] The device for adjusting the coil current of the magnetic levitation poles provided in this embodiment corresponds to the method described above, and therefore has the same beneficial effects as the method described above.

[0110] From a hardware perspective, this embodiment provides another device for adjusting the coil current of a magnetic levitation pole. Figure 5 A structural diagram of a device for adjusting the coil current of a magnetic levitation pole provided in another embodiment of this application is shown below. Figure 5 As shown, the device for adjusting the coil current of the magnetic levitation pole includes: a memory 20 for storing a computer program;

[0111] The processor 21 is used to execute a computer program to implement the steps of the method for adjusting the coil current of the magnetic levitation poles as mentioned in the above embodiments.

[0112] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0113] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the method for adjusting the coil current of the magnetic levitation poles disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc. The data 203 may include, but is not limited to, data related to the method for adjusting the coil current of the magnetic levitation poles.

[0114] In some embodiments, the device for adjusting the coil current of the magnetic levitation pole may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0115] Those skilled in the art will understand that the structure shown in the figure does not constitute a limitation on the adjustment device for the coil current of the magnetic levitation pole, and may include more or fewer components than shown.

[0116] The device for adjusting the coil current of a magnetic levitation pole provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: a method for adjusting the coil current of a magnetic levitation pole.

[0117] The device for adjusting the coil current of the magnetic levitation poles provided in this embodiment corresponds to the method described above, and therefore has the same beneficial effects as the method described above.

[0118] Finally, this application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps described in the above method embodiments.

[0119] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0120] The computer-readable storage medium provided in this embodiment corresponds to the method described above, and therefore has the same beneficial effects as the method described above.

[0121] The foregoing has provided a detailed description of a magnetic levitation pole, a method for adjusting the coil current of the magnetic levitation pole, an apparatus, and a medium. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0122] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the aforementioned element.

Claims

1. A magnetic levitation pole, characterized in that, Includes a DC excitation coil, an AC excitation coil with adjustable current, and a controller; The number of turns and current of the DC excitation coil and the AC excitation coil are determined according to the performance requirements of the magnetic poles and the initial levitation force requirements of the magnetic levitation train. The performance requirements include at least one of the power requirements and the dynamic response capability requirements. The controller is used to monitor the status of the maglev train during operation to obtain the change in the levitation force of the maglev train, and adjust the current of the AC excitation coil according to the change in the levitation force of the maglev train. The process of determining the number of turns and current of the DC excitation coil and the AC excitation coil based on the performance requirements and the initial levitation force requirements includes: The initial number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements. A finite element model of the magnetic levitation poles is constructed based on the number of turns and current of the DC excitation coil and the AC excitation coil. The current performance parameters and levitation force of the magnetic levitation poles are obtained by electromagnetic field calculation using a finite element model. The number of turns and current of the DC excitation coil and the AC excitation coil are adjusted according to the current performance parameter values ​​and levitation force of the magnetic levitation pole, as well as the performance requirements and the initial levitation force requirements. The process then returns to the step of building a finite element model of the magnetic levitation pole based on the number of turns and current of the DC excitation coil and the AC excitation coil, until the number of turns and current that meet the performance requirements and the initial levitation force requirements are obtained.

2. A method for adjusting the coil current of a magnetic levitation pole, characterized in that, A controller for a maglev pole, wherein the maglev pole further includes a DC excitation coil and an AC excitation coil with adjustable current; wherein the number of turns and current of the DC excitation coil and the AC excitation coil are determined according to the performance requirements of the maglev pole and the initial levitation force requirements of the maglev train, wherein the performance requirements include at least one of power requirements and dynamic response capability requirements; the method includes: During the operation of the maglev train, the status of the maglev train is monitored; The changes in the levitation force of the maglev train are obtained; Adjust the current of the AC excitation coil according to the changes in the levitation force; The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements, including: The initial number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements. A finite element model of the magnetic levitation poles is constructed based on the number of turns and current of the DC excitation coil and the AC excitation coil. The current performance parameters and levitation force of the magnetic levitation poles are obtained by electromagnetic field calculation using a finite element model. Adjust the number of turns and current of the DC excitation coil and the AC excitation coil according to the current performance parameter values ​​and levitation force of the magnetic levitation pole, as well as the performance requirements and the initial levitation force requirements. Then return to the step of building the finite element model of the magnetic levitation pole according to the number of turns and current of the DC excitation coil and the AC excitation coil, until the number of turns and current that meet the performance requirements and the initial levitation force requirements are obtained.

3. The method for adjusting the coil current of the magnetic levitation poles according to claim 2, characterized in that, The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements, including: The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements, the initial levitation force requirements, and the temperature rise of the magnetic levitation poles.

4. The method for adjusting the coil current of the magnetic levitation poles according to claim 3, characterized in that, The determination of the number of turns and current of the DC excitation coil and the AC excitation coil based on the performance requirements, the initial levitation force requirements, and the temperature rise of the magnetic levitation poles includes: The initial number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements. A finite element model of the magnetic levitation poles is constructed based on the number of turns and current of the DC excitation coil and the AC excitation coil. The current performance parameters and levitation force of the magnetic levitation pole are obtained by electromagnetic field calculation using a finite element model, and the temperature rise of the magnetic levitation pole is obtained by electromagnetic field-thermal field coupling calculation using a finite element model. Based on the current performance parameters and levitation force of the magnetic levitation pole, the performance requirements, the initial levitation force requirements, and the temperature rise, adjust the number of turns and current of the DC excitation coil and the AC excitation coil, and return to the step of building the finite element model of the magnetic levitation pole based on the number of turns and current of the DC excitation coil and the AC excitation coil, until the number of turns and current that meet the performance requirements and the initial levitation force requirements under the temperature rise are obtained.

5. The method for adjusting the coil current of a magnetic levitation pole according to claim 2, characterized in that, The performance requirements include at least the dynamic response capability requirements; the dynamic response capability is obtained based on the electrical constants of the magnetic levitation poles.

6. The method for adjusting the coil current of a magnetic levitation pole according to claim 5, characterized in that, The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the dynamic response capability requirements and the initial levitation force requirements of the magnetic levitation poles, including: Determine the original electrical constants corresponding to the number of turns and current when a single coil provides the initial levitation force; Adjust the number of turns and current of the DC excitation coil and the AC excitation coil so that the electrical constant corresponding to the number of turns and current of the AC excitation coil is less than the original electrical constant.

7. The method for adjusting the coil current of a magnetic levitation pole according to claim 2, characterized in that, The performance requirements include at least the power requirements; The number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the power requirements of the magnetic levitation poles and the initial levitation force requirements, including: Determine the original power corresponding to the number of turns and current when a single coil provides the initial levitation force; Adjust the number of turns and current of the DC excitation coil and the AC excitation coil so that the combined power of the DC excitation coil and the AC excitation coil is less than the original power.

8. The method for adjusting the coil current of a magnetic levitation pole according to claim 7, characterized in that, The power requirement specifically refers to the minimum excitation power of the magnetic levitation poles.

9. The method for adjusting the coil current of a magnetic levitation pole according to claim 2, characterized in that, The number of both the DC excitation coil and the AC excitation coil is one.

10. A device for adjusting the coil current of a magnetic levitation pole, characterized in that, A controller for maglev poles, wherein the maglev poles further include DC excitation coils and AC excitation coils with adjustable current; wherein the number of turns and current of the DC excitation coils and the AC excitation coils are determined according to the performance requirements of the maglev poles and the initial levitation force requirements of the maglev train, the performance requirements including at least one of power requirements and dynamic response capability requirements; the device includes: The monitoring module is used to monitor the status of the maglev train during its operation. The acquisition module is used to acquire the levitation force change status of the maglev train; An adjustment module is used to adjust the current of the AC excitation coil according to the changes in the levitation force; The process of determining the number of turns and current of the DC excitation coil and the AC excitation coil based on the performance requirements and the initial levitation force requirements includes: The initial number of turns and current of the DC excitation coil and the AC excitation coil are determined based on the performance requirements and the initial levitation force requirements. A finite element model of the magnetic levitation poles is constructed based on the number of turns and current of the DC excitation coil and the AC excitation coil. The current performance parameters and levitation force of the magnetic levitation poles are obtained by electromagnetic field calculation using a finite element model. Adjust the number of turns and current of the DC excitation coil and the AC excitation coil according to the current performance parameter values ​​and levitation force of the magnetic levitation pole, as well as the performance requirements and the initial levitation force requirements. Then return to the step of building the finite element model of the magnetic levitation pole according to the number of turns and current of the DC excitation coil and the AC excitation coil, until the number of turns and current that meet the performance requirements and the initial levitation force requirements are obtained.

11. A device for adjusting the coil current of a magnetic levitation pole, characterized in that, Includes memory used to store computer programs; A processor, configured to implement the steps of the method for adjusting the coil current of a magnetic levitation pole as described in any one of claims 2 to 9 when executing the computer program.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method for adjusting the coil current of the magnetic levitation pole as described in any one of claims 2 to 9.

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