Permanent magnet volume determination method and device, storage medium and electronic equipment

Abstract

The embodiment of the invention provides a method and device for determining the volume of a permanent magnet, a storage medium and electronic equipment, and the method comprises the steps: determining the repulsive force corresponding to the magnetic suspension between the permanent magnet in a target object and a wind wheel, the minimum gap between the permanent magnet and the wind wheel, and the diameter of the permanent magnet, the minimum gap is used for indicating a minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel; determining the target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet; and determining a target volume corresponding to the permanent magnet according to the target thickness. According to the method, the problem that the required magnetic suspension force is not matched with the size of the permanent magnet in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the field of magnetic levitation vertical axis devices, and in particular to a method and device for determining the volume of a permanent magnet, a storage medium, and an electronic device. Background Art

[0002] As a clean energy, wind energy has the advantages of being environmentally friendly, renewable and widely distributed. Wind turbines are the main equipment for converting wind energy into electrical energy, including key components such as wind rotors, power generation systems and supporting structures. Among them, the wind rotor is the core of the wind turbine, responsible for converting wind energy into rotational kinetic energy, transmitting it to the power generation system through the rotating shaft, and finally converting it into electrical energy. However, the rotating shaft of the wind rotor body is usually arranged vertically, which is greatly affected by wind force and bears large bending moment force. The stability requirements of the wind rotor body are high, and traditional vertical axis wind turbines rely on complex multi-layer blades, which are complex in structure and expensive. Therefore, improving the structure and operating efficiency of existing vertical axis wind turbines to improve their stability and economic benefits has become a hot topic and challenge in current research.

[0003] Existing vertical axis wind turbines usually use passive magnetic bearing technology to support the rotor body, generate a magnetic field through an electromagnetic coil, and use electromagnetic attraction or electromagnetic repulsion to achieve magnetic suspension of the rotor body. However, traditional magnetic suspension vertical axis wind turbines face problems such as insufficient magnetic induction intensity of the electromagnetic coil, low magnetic suspension stability, and heating of the electromagnetic coil, which limits their energy conversion efficiency and control accuracy.

[0004] Currently, no effective solution has been proposed to the problem of mismatch between the required magnetic levitation force and the volume of the permanent magnet in the related art.

[0005] Therefore, it is necessary to improve the related technology to overcome the above-mentioned defects in the related technology. Summary of the invention

[0006] The embodiments of the present application provide a method and device for determining the volume of a permanent magnet, a storage medium, and an electronic device, so as to at least solve the problem in the related art that the required magnetic levitation force does not match the volume of the permanent magnet.

[0007] According to one embodiment of the present application, a method for determining the volume of a permanent magnet is provided, comprising: determining the repulsive force corresponding to the magnetic suspension between a permanent magnet in a target object and a wind wheel, the minimum gap between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate the minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel; determining the target thickness of the permanent magnet according to the repulsive force, the minimum gap and the permanent magnet diameter; and determining the target volume corresponding to the permanent magnet according to the target thickness.

[0008] In an exemplary embodiment, determining the repulsive force corresponding to the magnetic levitation between a permanent magnet in a target object and a wind wheel includes: determining the wind wheel weight of the wind wheel; determining the static load of the wind wheel according to the wind wheel weight, and determining the dynamic load corresponding to the target object; determining the total load corresponding to the target object according to the static load and the dynamic load; and determining the repulsive force according to the total load.

[0009] In an exemplary embodiment, determining the permanent magnet diameter of the permanent magnet includes: determining the material of the permanent magnet and determining the magnetic performance parameters corresponding to the material; determining a first size of the wind wheel and a second size corresponding to the motor in the target object; and determining the permanent magnet diameter based on the first size, the second size and the magnetic performance parameters.

[0010] In an exemplary embodiment, the target thickness of the permanent magnet is determined according to the repulsive force, the minimum gap and the permanent magnet diameter, including: determining a magnetic material property table according to the material type corresponding to the material of the permanent magnet, wherein the magnetic material property table is used to indicate different thickness ranges of the permanent magnet corresponding to different permanent magnet diameters and different repulsive forces; determining a target thickness range in the magnetic material property table according to the repulsive force and the permanent magnet diameter; determining a target thickness set within the target thickness range according to the minimum gap, and determining the first thickness in the target thickness set as the target thickness.

[0011] In an exemplary embodiment, determining the target volume corresponding to the permanent magnet according to the target thickness includes: determining whether a first bearing capacity of a target object including a permanent magnet of the first thickness meets a preset bearing capacity requirement; when it is determined that the first bearing capacity meets the preset bearing capacity requirement, determining the target volume according to the target thickness; when it is determined that the first bearing capacity does not meet the preset bearing capacity requirement, determining a second thickness in the target thickness set as the target thickness, and determining whether a second bearing capacity of the target object including a permanent magnet of the second thickness meets the preset bearing capacity requirement; when it is determined that the second bearing capacity meets the preset bearing capacity requirement, determining the target volume according to the target thickness.

[0012] In an exemplary embodiment, determining a target volume corresponding to the permanent magnet according to the target thickness includes: determining the permanent magnet height of the permanent magnet when the shape of the permanent magnet is the target shape; and determining the target volume according to a volume formula corresponding to the permanent magnet height, the permanent magnet diameter and the target shape.

[0013] According to another embodiment of the present application, a device for determining the volume of a permanent magnet is provided, comprising: a first determination module, used to determine the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel in the target object, the minimum gap between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate the minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel; a second determination module, used to determine the target thickness of the permanent magnet according to the repulsive force, the minimum gap and the permanent magnet diameter; and a third determination module, used to determine the target volume corresponding to the permanent magnet according to the target thickness.

[0014] According to another embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when run.

[0015] According to another embodiment of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0016] According to another embodiment of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0017] Through the embodiment of the present application, the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel in the target object, the minimum gap between the permanent magnet and the wind wheel for indicating the minimum distance for maintaining the non-contact suspension state between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet are determined; the target thickness of the permanent magnet is determined according to the repulsive force, the minimum gap and the permanent magnet diameter; the target volume corresponding to the permanent magnet is determined according to the target thickness. That is to say, the embodiment of the present application first determines the target thickness of the permanent magnet by the repulsive force, the minimum gap and the permanent magnet diameter, and then determines the target volume corresponding to the permanent magnet by the target thickness. It is understandable that too large a volume will increase the cost and weight, affecting the efficiency and installation of the system; and too small a volume may not provide sufficient magnetic suspension force. The target volume determined by the embodiment of the present application can solve the problem of mismatch between the required magnetic suspension force and the volume of the permanent magnet in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a hardware structure block diagram of a computer terminal device of a method for determining the volume of a permanent magnet according to an embodiment of the present application;

[0021] Figure 2 is a flow chart of a method for determining the volume of a permanent magnet according to an embodiment of the present application;

[0022] Figure 3 is a flow chart of a method for determining the volume of a permanent magnet according to an optional embodiment of the present application;

[0023] Figure 4 is a schematic diagram of a magnetic suspension vertical axis device according to an optional embodiment of the present application;

[0024] Figure 5 It is a structural block diagram of a device for determining the volume of a permanent magnet according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0027] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal device or a similar computing device. Taking running on a computer terminal device as an example, Figure 1 1 is a hardware structure block diagram of a computer terminal device for determining the volume of a permanent magnet according to an embodiment of the present application. Figure 1 As shown, the computer terminal device may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the above-mentioned computer terminal device may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer terminal device. Figure 1More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0028] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the method for determining the volume of the permanent magnet in the embodiment of the present application, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, realizing the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0029] The transmission device 106 is used to receive or send data via a network. The above-mentioned network specific examples may include a wireless network provided by a communication provider of a computer terminal device. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0030] In this embodiment, a method for determining the volume of a permanent magnet is provided. Figure 2 is a flow chart of a method for determining the volume of a permanent magnet according to an embodiment of the present application, such as Figure 2 As shown, the process includes the following steps:

[0031] Step S202, determining the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel in the target object, the minimum gap between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate the minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel;

[0032] Among them, the target object can be a magnetic bearing system of a small vertical axis wind turbine.

[0033] Step S204, determining a target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet;

[0034] Step S206: determining a target volume corresponding to the permanent magnet according to the target thickness.

[0035] Through the above steps, the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel in the target object, the minimum gap between the permanent magnet and the wind wheel for indicating the minimum distance for maintaining the non-contact suspension state between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet are determined; the target thickness of the permanent magnet is determined according to the repulsive force, the minimum gap and the permanent magnet diameter; the target volume corresponding to the permanent magnet is determined according to the target thickness. That is to say, the embodiment of the present application first determines the target thickness of the permanent magnet by the repulsive force, the minimum gap and the permanent magnet diameter, and then determines the target volume corresponding to the permanent magnet by the target thickness. It is understandable that too large a volume will increase the cost and weight, affecting the efficiency and installation of the system; and too small a volume may not provide sufficient magnetic suspension force. The target volume determined by the embodiment of the present application can solve the problem of mismatch between the required magnetic suspension force and the volume of the permanent magnet in the related art.

[0036] Optionally, the above step S204 of determining the repulsive force corresponding to the magnetic suspension between the permanent magnet in the target object and the wind wheel includes: determining the wind wheel weight of the wind wheel; determining the static load of the wind wheel according to the wind wheel weight, and determining the dynamic load corresponding to the target object; determining the total load corresponding to the target object according to the static load and the dynamic load; and determining the repulsive force according to the total load.

[0037] It is understandable that before determining the target volume of the permanent magnet, it is necessary to determine the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel, specifically:

[0038] Determine the rotor weight of the wind rotor: The weight of the wind rotor (i.e., the rotating part of the wind turbine) needs to be accurately measured or calculated. The rotor weight is the basis for subsequent load analysis and magnetic suspension force calculation.

[0039] Determine the static load of the wind rotor: The static load is the load on the magnetic bearing due to gravity and the deadweight of the structure when the wind rotor is stationary or rotating at a low speed. The static load is directly related to the weight of the wind rotor and is usually equal to the vertical component of the wind rotor weight on the magnetic bearing.

[0040] Determine the dynamic load corresponding to the target object: Dynamic load refers to the additional load acting on the magnetic bearing when the wind rotor rotates at high speed or is subjected to external forces such as wind force and temperature change. These loads may include centrifugal force generated by the rotation of the wind rotor, lateral force caused by wind fluctuations, thermal expansion force caused by temperature changes, etc. The determination of dynamic load is usually based on the operating conditions and material properties of the wind rotor.

[0041] Determine the total load corresponding to the target object: The total load is the superposition of the static load and the dynamic load, which represents the total external force that the magnetic bearing needs to withstand under the worst conditions. Determining the total load is a key step in designing a magnetic levitation system, which directly affects the volume of the permanent magnet and the calculation of the magnetic levitation force.

[0042] Determine the repulsive force: The repulsive force is the magnetic levitation force, which needs to be sufficient to overcome the total load of the wind rotor to achieve stable suspension of the wind rotor shaft. The calculation of the repulsive force is based on the physical properties of the magnets, the total load of the wind rotor, and the minimum clearance requirements of the system. During the design phase, the determination of the repulsive force is the basis for selecting the permanent magnet size and optimizing the performance of the magnetic levitation system.

[0043] For example: suppose you are designing a magnetic bearing system for a small vertical axis wind turbine with a rotor weight of 200 kg.

[0044] Determine the static load: When the wind rotor is stationary, the static load is almost entirely composed of the weight of the wind rotor, and the static load can be determined based on the weight of the wind rotor.

[0045] Determine the dynamic load: Consider the maximum dynamic load that the wind rotor may generate when the wind speed reaches 10 m / s. For example, assuming that the dynamic load is 20% of the weight of the wind rotor, the dynamic load can be determined.

[0046] The total load is the sum of the static load and the dynamic load. If the static load is 1960 Newtons and the dynamic load is 392 Newtons, the total load is 1960+392=2352 Newtons.

[0047] Determine the required repulsive force: Based on the total load, it can be determined that the magnetic suspension system needs to provide a repulsive force of at least 2352 Newtons (the above 2352 Newtons is only for example) to achieve stable suspension.

[0048] Through the above steps, the volume of the permanent magnet can be scientifically determined to ensure that the magnetic levitation system can effectively support the weight of the wind rotor and the dynamic load during operation, achieve stable non-contact suspension of the wind rotor shaft, and thus improve the performance and efficiency of the wind turbine.

[0049] Optionally, the above step S202 of determining the permanent magnet diameter of the permanent magnet includes: determining the material of the permanent magnet and determining the magnetic performance parameters corresponding to the material; determining the first size of the wind wheel and the second size corresponding to the motor in the target object; determining the permanent magnet diameter based on the first size, the second size and the magnetic performance parameters.

[0050] It is understandable that determining the target volume also requires determining the diameter of the permanent magnet, specifically:

[0051] Determine the material of the permanent magnet and determine the magnetic performance parameters corresponding to the material: You need to select the material type of the permanent magnet. Common permanent magnet materials include neodymium iron boron (NdFeB), samarium cobalt (SmCo), aluminum nickel cobalt (Al Ni Co), etc. Each material has its own specific magnetic performance parameters, such as relative magnetic permeability, remanence, coercive force, maximum energy product, etc. For example, neodymium iron boron material has very high magnetic force and is suitable for application scenarios that require strong magnetic force, while samarium cobalt material has better magnetic properties in high temperature environments.

[0052] Assuming that NdFeB material is chosen as the material for permanent magnets, its key magnetic performance parameters may include remanence \(B_r\) (approximately 1.25-1.45 Tesla), coercive force \(H_c\) (approximately 880-1030 kA / m), maximum energy product \(BH_{\max}\) (approximately 350-480 kJ / m3), etc.

[0053] Determine the first size of the wind rotor and the second size of the motor in the target object: The first size of the wind rotor usually refers to its diameter or radius, and the second size of the motor may include the diameter of the motor shaft, the length of the motor, etc. These sizes are closely related to the diameter selection of the permanent magnet, because the permanent magnet needs to cooperate with the wind rotor and motor structure to achieve an effective magnetic levitation effect.

[0054] For example, suppose the diameter of the wind rotor is 3 meters and the diameter of the motor shaft is 0.2 meters. To design the magnetic bearing, the rotation radius of the wind rotor and the size of the motor shaft need to be taken into account to ensure that the permanent magnets can cover enough area to generate the required magnetic levitation force.

[0055] Determine the diameter of the permanent magnet: The diameter of the permanent magnet needs to be selected based on the size of the wind wheel and motor, as well as the magnetic performance parameters of the selected material. The goal is to ensure that the permanent magnet can provide sufficient magnetic levitation force while optimizing its size to achieve a balance in terms of cost, weight and heat dissipation.

[0056] For example, considering that the radius of the wind rotor is 1.5 meters (half of the 3-meter diameter), the motor shaft diameter is 0.2 meters, and the magnetic performance parameters of the NdFeB permanent magnet are known, it may be necessary to determine the optimal diameter of the permanent magnet by formula calculation or table lookup. For example, considering that the permanent magnet needs to match the motor shaft diameter and cover a certain area of ​​the wind rotor rotation center while maintaining sufficient magnetic performance to generate the required magnetic force, it may be ultimately determined that the diameter of the permanent magnet is 0.25 meters.

[0057] The above technical solution ensures that the permanent magnet can provide a stable magnetic levitation force under the specific size and material conditions of the vertical axis wind turbine, realize non-contact suspension of the wind rotor shaft, and thus improve the efficiency and reliability of the wind turbine.

[0058] Optionally, the above step S204 of determining the target thickness of the permanent magnet according to the repulsive force, the minimum gap and the permanent magnet diameter includes: determining a magnetic material property table according to the material type corresponding to the material of the permanent magnet, wherein the magnetic material property table is used to indicate different thickness ranges of the permanent magnet corresponding to different permanent magnet diameters and different repulsive forces; determining a target thickness range in the magnetic material property table according to the repulsive force and the permanent magnet diameter; determining a target thickness set within the target thickness range according to the minimum gap, and determining the first thickness in the target thickness set as the target thickness.

[0059] It can be understood that after determining the repulsive force, the minimum gap and the permanent magnet diameter, the target thickness of the permanent magnet is determined collectively, specifically:

[0060] Determine the material type and magnetic material property table of the permanent magnet: Assume that NdFeB is selected as the permanent magnet material. This material is known for its high remanence and coercivity, which is very suitable for magnetic levitation systems. You can refer to relevant literature or product manuals to establish a magnetic material property table, which lists the thickness range that can be achieved for NdFeB permanent magnets under different diameters and different repulsion conditions. For example: The magnetic material property table shows that when the permanent magnet diameter is 0.25 meters and the repulsion force is 2000 Newtons, the thickness range of the permanent magnet is 10-20 mm; when the repulsion force is increased to 3000 Newtons, the thickness range becomes 15-25 mm. Similarly, for a permanent magnet with a diameter of 0.30 meters, the thickness range will vary depending on the repulsion force.

[0061] Determine the target thickness range: If the required repulsive force is calculated to be 2352 Newtons and the permanent magnet diameter is determined to be 0.25 meters. By consulting the magnetic material property table, data with repulsive forces between 2000 Newtons and 3000 Newtons can be found, thus determining the target thickness range to be 15-20 mm (this is approximately determined based on the table insertion method, and more accurate calculations or more detailed property tables may be required in actual applications).

[0062] Determine the target thickness based on the minimum gap: The minimum gap requires that the distance between the permanent magnet and the wind rotor axis must meet the requirements of system stability and control accuracy. Assuming that the minimum gap required by the system is 1 mm, it is necessary to find a thickness within the target thickness range that can ensure the required magnetic levitation force under the minimum gap condition. This may require further calculations or experimental verification to determine the specific value of the permanent magnet thickness in the range of 15-20 mm that can provide sufficient magnetic levitation force. If it is calculated that a 16 mm thick permanent magnet can meet the minimum gap condition and provide a repulsive force of 2352 Newtons, then 16 mm will be part of the target thickness set.

[0063] Determine the target thickness set: Within the target thickness range, you may find that several thickness values ​​(e.g., 16 mm, 18 mm, and 20 mm) meet the system performance and minimum gap requirements. These thickness values ​​will constitute the target thickness set.

[0064] Determine target thickness: Select a thickness from the target thickness set as the target thickness. Other factors are usually considered when selecting, such as cost, weight, and heat dissipation performance. For example, if a 16 mm thick permanent magnet meets the system requirements while also having a lower cost and weight, it may be selected as the first thickness, i.e., the target thickness.

[0065] Through this process, the thickness of the permanent magnet can be scientifically determined to ensure that the performance requirements of the magnetic levitation system (including the required repulsive force and minimum gap) are met while optimizing cost and weight. The above technical solution is of great significance for improving the efficiency and reliability of the magnetic levitation vertical axis device and reducing its manufacturing cost.

[0066] Optionally, the above-mentioned step S206 of determining the target volume corresponding to the permanent magnet according to the target thickness includes: determining whether a first bearing capacity of the target object including the permanent magnet of the first thickness meets a preset bearing capacity requirement; when it is determined that the first bearing capacity meets the preset bearing capacity requirement, determining the target volume according to the target thickness; when it is determined that the first bearing capacity does not meet the preset bearing capacity requirement, determining the second thickness in the target thickness set as the target thickness, and determining whether the second bearing capacity of the target object including the permanent magnet of the second thickness meets the preset bearing capacity requirement; when it is determined that the second bearing capacity meets the preset bearing capacity requirement, determining the target volume according to the target thickness.

[0067] It can be understood that after the target thickness is determined by the method of step S204, the target volume can be determined according to the target thickness. Specifically:

[0068] Determine the target thickness set: The target thickness set may contain several thickness values, such as 16 mm, 18 mm, and 20 mm.

[0069] Determine the first bearing capacity of the first thickness: Select the first thickness in the set (e.g., 16 mm) and calculate the first bearing capacity that the permanent magnet of this thickness can provide. This bearing capacity is calculated based on the magnetic performance parameters of the permanent magnet material, the permanent magnet diameter, and the thickness. For example, assume that the first bearing capacity that a 16 mm thick permanent magnet can provide is 2300 Newtons.

[0070] Check whether the first bearing capacity meets the preset bearing capacity requirement: It is necessary to compare the first bearing capacity (2300 Newtons) with the preset bearing capacity requirement (at least 2352 Newtons). If the first bearing capacity is less than the preset bearing capacity, it means that the permanent magnet cannot provide enough repulsive force to stabilize the magnetic suspension system, and it is necessary to consider increasing the thickness of the permanent magnet.

[0071] Determine the target volume based on the target thickness (if the bearing capacity meets the requirements): If the first bearing capacity provided by the permanent magnet with a thickness of 16 mm does reach or exceed 2352 Newtons (the preset bearing capacity requirement), then 16 mm can be determined as the final target thickness, and the target volume of the permanent magnet at this thickness can be calculated.

[0072] When the bearing capacity does not meet the requirements, the second thickness is selected and the above process is repeated: If it is found that the bearing capacity of the 16 mm thick permanent magnet is insufficient, the second thickness (e.g. 18 mm) is selected from the target thickness set and the above process is repeated: the second bearing capacity (e.g. 2400 Newtons) is calculated, and then the bearing capacity is checked to see if it meets the preset bearing capacity requirements. If the bearing capacity meets the requirements, the target volume of the permanent magnet can be calculated based on the target thickness of 18 mm.

[0073] Assume that the bearing capacity of a 16 mm thick permanent magnet is 2300 Newtons, which does not meet the preset bearing capacity requirement of 2352 Newtons. At this time, you can choose 18 mm thickness for calculation. Assume that the bearing capacity of a 18 mm thick permanent magnet is 2450 Newtons, which is greater than the preset bearing capacity requirement. Therefore, 18 mm can be determined as the final target thickness, and the target volume of the permanent magnet at this thickness can be calculated.

[0074] Through the above technical solution, the thickness of the permanent magnet can be systematically verified and adjusted to ensure that the final selected thickness can provide the required magnetic levitation force, while optimizing the volume of the permanent magnet to achieve a balance between system performance and cost-effectiveness.

[0075] Optionally, the above step S206 of determining the target volume corresponding to the permanent magnet according to the target thickness includes: when the shape of the permanent magnet is the target shape, determining the permanent magnet height of the permanent magnet; and determining the target volume according to the volume formula corresponding to the permanent magnet height, the permanent magnet diameter and the target shape.

[0076] It is understandable that the technical solution for determining the target volume may be:

[0077] Determine the target shape of the permanent magnet: Suppose you decide to use a cylindrical permanent magnet, which is a common permanent magnet shape in magnetic levitation systems because it provides a uniform and stable magnetic force distribution.

[0078] Determine the permanent magnet diameter: Assume that the calculated permanent magnet diameter is 0.25 meters (ie 250 mm), which is determined based on the wind rotor size and the repulsive force requirements of the magnetic levitation system.

[0079] Determine the height of the permanent magnet: After determining the diameter of the permanent magnet, you need to further determine the height of the permanent magnet. The height of the permanent magnet will directly affect its volume, and thus the magnitude of the magnetic levitation force. During the design process, the height of the permanent magnet is often related to the diameter and the volume required for the magnetic levitation system. You may need to determine a suitable height by calculation or by referring to the magnetic material property table.

[0080] Assume that after calculation, it is determined that the thickness (ie, height) of the cylindrical permanent magnet is 18 mm to meet the required magnetic levitation force (eg, 2450 Newtons) while taking into account the minimum gap and cost-effectiveness.

[0081] Determine the target volume of the permanent magnet according to the volume formula corresponding to the target shape:

[0082] The target volume of a cylindrical permanent magnet can be calculated from its diameter and height using the cylinder volume formula: V = h × πr 2 Where r=d / 2, V is the target volume, r is the radius (i.e., half of the diameter d), and h is the height.

[0083] Substituting the determined diameter of 0.25 m (radius of 0.125 m) and height of 0.018 m into the formula, the target volume of the cylindrical permanent magnet is calculated.

[0084] Through this process, the target volume of the permanent magnet can be accurately calculated based on the target shape, diameter and height. This volume calculation not only provides specific parameters for the manufacture of the permanent magnet, but is also a key step in evaluating the cost, weight and magnetic properties of the magnetic levitation system. Ensuring that the volume of the permanent magnet matches the design requirements of the magnetic levitation system is an important prerequisite for achieving efficient and stable operation of the system.

[0085] In order to better understand the process of the above-mentioned method for determining the volume of the permanent magnet, the implementation method flow of the above-mentioned method for determining the volume of the permanent magnet is described below in combination with an optional embodiment, but it is not used to limit the technical solution of the embodiment of the present application.

[0086] The rotating main shaft of the vertical axis wind turbine (i.e., the target object) is subjected to the combined effects of gravity and bending moment, resulting in a large load and poor bearing reliability. An optional embodiment of the present application proposes a passive magnetic levitation bearing device, which can be used together with a radial locating bearing to achieve suspension of the wind wheel body, thereby reducing the main bearing load.

[0087] A passive magnetic bearing device is a device that uses the principle of magnetic force to support and control the movement of the rotor. In a wind turbine, a passive magnetic bearing device usually consists of a fixed part and a rotating part. The fixed part is usually installed inside the casing, while the rotating part is installed on the rotor.

[0088] Passive magnetic bearings use built-in magnets and electromagnetic coils to generate magnetic fields, and use the interaction between magnetic fields to support and control the bearings. When the rotor is running, the magnetic field will generate magnetic force to suspend the rotor in the air, and the position and stability of the rotor can be controlled by adjusting the current.

[0089] Passive magnetic bearing devices have the advantages of reducing friction, reducing energy consumption, improving efficiency and extending life, and can effectively improve the performance and operating stability of wind turbines.

[0090] Figure 3 is a flow chart of a method for determining the volume of a permanent magnet according to an optional embodiment of the present application, such as Figure 3 As shown:

[0091] Step S301, determining the capacity of the wind turbine generator set;

[0092] The capacity of a wind turbine directly affects its structural design and performance. For example, a large-capacity wind turbine usually requires a larger rotor diameter and a more powerful generator to capture more wind energy and convert it into electrical energy. This not only increases the complexity of manufacturing and installation, but may also affect the structural strength, stability and maintenance costs of the turbine.

[0093] Step S302, determining the size of the wind rotor (i.e., the first size);

[0094] Figure 4 is a schematic diagram of a magnetic suspension vertical axis device according to an optional embodiment of the present application, such as Figure 4 As shown, Figure 4 The left half of the figure is the wind rotor, H is the rotation radius of the wind rotor, and F is the height of the wind rotor. The wind rotor size is determined by the combination of H and F.

[0095] Step S303, determining the weight of the wind wheel;

[0096] Step S304, determining the repulsive force required for magnetic suspension according to the weight of the wind wheel;

[0097] Figure 4 The right half of is a permanent magnet, where N and S are the N and S levels of the permanent magnet respectively, and Fe is the repulsive force, such as Figure 4As shown, the repulsive force is related to the permanent magnet diameter D and the permanent magnet thickness L, and the permanent magnet diameter and the permanent magnet thickness are related to the gravity G and the thrust exerted on the permanent magnet, wherein the gravity G can be determined by the wind rotor weight, and M is related to the wind rotor size.

[0098] Step S305, determining that the minimum gap of magnetic suspension is 0.5 mm;

[0099] Step S306, determining the permanent magnet diameter D according to the motor size;

[0100] Step S307, determining that the permanent magnet is made of Ruthenium-iron-boron material;

[0101] Step S308, obtaining the required permanent magnet thickness (i.e., target thickness) by looking up a table according to the repulsive force, the permanent magnet gap, and the permanent magnet diameter;

[0102] Step S309, installing and testing whether the bearing capacity meets the requirements (i.e., the preset bearing capacity requirements);

[0103] If it is determined that the requirements are met, step S310 is executed; if the requirements are not met, step S308 is executed;

[0104] Step S310, determining the optimal volume of the permanent magnet (ie, the target volume).

[0105] The optional embodiments of the present application can significantly reduce the load: by using passive magnetic bearings, the wind rotor body can achieve non-contact suspension, which greatly reduces the gravity and bending moment force on the main shaft, reduces the dependence on and wear of traditional bearings, and extends the service life of the wind turbine. Improve efficiency: The use of passive magnetic bearings reduces friction and energy consumption, thereby improving the efficiency of the wind turbine. The non-contact operation mode reduces mechanical losses, allowing more wind energy to be converted into electrical energy. Enhance stability: Passive magnetic bearings can provide stable magnetic suspension force, and even under changing wind speed conditions, they can maintain a stable suspension state of the wind rotor shaft, improving the stability and reliability of the wind turbine under different operating conditions. Optimize design and cost: By determining the optimal material, size and thickness of the permanent magnet, the overall design of the magnetic suspension system can be optimized, the volume and weight of the permanent magnet can be reduced, thereby reducing the manufacturing cost, while ensuring that the system meets the preset load-bearing capacity and efficiency requirements. Improve maintenance convenience and reduce maintenance costs: The non-contact operation mode of the passive magnetic bearing reduces maintenance requirements, reduces maintenance costs and downtime caused by bearing wear, and improves the operating efficiency and economic benefits of the wind turbine.

[0106] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. 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 is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0107] In the present embodiment, a device for determining the volume of a permanent magnet is also provided, and the device is used to implement the above-mentioned embodiment and the preferred embodiment, and the description thereof will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware is also possible and contemplated.

[0108] Figure 5 is a structural block diagram of a device for determining the volume of a permanent magnet according to an embodiment of the present application, such as Figure 5 As shown, the device comprises:

[0109] A first determination module 52 is used to determine a repulsive force corresponding to magnetic suspension between a permanent magnet and a wind wheel in a target object, a minimum gap between the permanent magnet and the wind wheel, and a permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate a minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel;

[0110] A second determination module 54, configured to determine a target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet;

[0111] The third determination module 56 is configured to determine a target volume corresponding to the permanent magnet according to the target thickness.

[0112] Through the above device, the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel in the target object, the minimum gap between the permanent magnet and the wind wheel for indicating the minimum distance for maintaining the non-contact suspension state between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet are determined; the target thickness of the permanent magnet is determined according to the repulsive force, the minimum gap and the permanent magnet diameter; the target volume corresponding to the permanent magnet is determined according to the target thickness. That is to say, the embodiment of the present application first determines the target thickness of the permanent magnet by the repulsive force, the minimum gap and the permanent magnet diameter, and then determines the target volume corresponding to the permanent magnet by the target thickness. It can be understood that too large a volume will increase the cost and weight, affecting the efficiency and installation of the system; and too small a volume may not provide sufficient magnetic suspension force. The target volume determined by the embodiment of the present application can solve the problem of mismatch between the required magnetic suspension force and the volume of the permanent magnet in the related art.

[0113] In an exemplary embodiment, the first determination module 52 is further used to determine the weight of the wind wheel; determine the static load of the wind wheel according to the wind wheel weight, and determine the dynamic load corresponding to the target object; determine the total load corresponding to the target object according to the static load and the dynamic load; and determine the repulsive force according to the total load.

[0114] In an exemplary embodiment, the first determination module 52 is also used to determine the material of the permanent magnet and determine the magnetic performance parameters corresponding to the material; determine the first size of the wind wheel and the second size corresponding to the motor in the target object; determine the diameter of the permanent magnet based on the first size, the second size and the magnetic performance parameters.

[0115] In an exemplary embodiment, the second determination module 54 is further used to determine a magnetic material property table according to the material type corresponding to the material of the permanent magnet, wherein the magnetic material property table is used to indicate different thickness ranges of the permanent magnet corresponding to different permanent magnet diameters and different repulsive forces; determine a target thickness range in the magnetic material property table according to the repulsive force and the permanent magnet diameter; determine a target thickness set within the target thickness range according to the minimum gap, and determine the first thickness in the target thickness set as the target thickness.

[0116] In an exemplary embodiment, the third determination module 56 is also used to determine whether the first bearing capacity of the target object including the permanent magnet of the first thickness meets the preset bearing capacity requirement; when it is determined that the first bearing capacity meets the preset bearing capacity requirement, the target volume is determined according to the target thickness; when it is determined that the first bearing capacity does not meet the preset bearing capacity requirement, the second thickness in the target thickness set is determined as the target thickness, and it is determined whether the second bearing capacity of the target object including the permanent magnet of the second thickness meets the preset bearing capacity requirement; when it is determined that the second bearing capacity meets the preset bearing capacity requirement, the target volume is determined according to the target thickness.

[0117] In an exemplary embodiment, the third determination module 56 is further used to determine the permanent magnet height of the permanent magnet when the shape of the permanent magnet is the target shape; and determine the target volume according to the volume formula corresponding to the permanent magnet height, the permanent magnet diameter and the target shape.

[0118] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0119] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0120] Optionally, in this embodiment, the storage medium may be configured to store program codes for executing the following steps:

[0121] S1, determining a repulsive force corresponding to magnetic suspension between a permanent magnet and a wind wheel in a target object, a minimum gap between the permanent magnet and the wind wheel, and a permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate a minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel;

[0122] S2, determining a target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet;

[0123] S3, determining a target volume corresponding to the permanent magnet according to the target thickness.

[0124] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0125] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0126] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0127] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0128] S1, determining a repulsive force corresponding to magnetic suspension between a permanent magnet and a wind wheel in a target object, a minimum gap between the permanent magnet and the wind wheel, and a permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate a minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel;

[0129] S2, determining a target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet;

[0130] S3, determining a target volume corresponding to the permanent magnet according to the target thickness.

[0131] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0132] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0133] An embodiment of the present application also provides a computer program, which includes computer instructions, which are stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in any one of the above method embodiments.

[0134] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0135] S1, determining a repulsive force corresponding to magnetic suspension between a permanent magnet and a wind wheel in a target object, a minimum gap between the permanent magnet and the wind wheel, and a permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate a minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel;

[0136] S2, determining a target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet;

[0137] S3, determining a target volume corresponding to the permanent magnet according to the target thickness.

[0138] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0139] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0140] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining the volume of a permanent magnet, characterized in that: include: Determine a repulsive force corresponding to magnetic suspension between a permanent magnet and a wind wheel in a target object, a minimum gap between the permanent magnet and the wind wheel, and a permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate a minimum distance for maintaining a non-contact suspension state between the permanent magnet and the wind wheel; determining a target thickness of the permanent magnet according to the repulsive force, the minimum gap, and the permanent magnet diameter; A target volume corresponding to the permanent magnet is determined according to the target thickness.

2. The method according to claim 1, characterized in that Determine the repulsive force corresponding to the magnetic suspension between the permanent magnet in the target object and the wind wheel, including: Determining the wind rotor weight of the wind rotor; Determining the static load of the wind wheel according to the weight of the wind wheel, and determining the dynamic load corresponding to the target object; Determine a total load corresponding to the target object according to the static load and the dynamic load; The repulsive force is determined based on the total load.

3. The method according to claim 1, characterized in that Determining the permanent magnet diameter of the permanent magnet comprises: Determining the material of the permanent magnet and determining the magnetic performance parameters corresponding to the material; Determine a first size of the wind wheel and a second size corresponding to the motor in the target object; The permanent magnet diameter is determined according to the first size, the second size and the magnetic performance parameter.

4. The method according to claim 1, characterized in that Determining a target thickness of the permanent magnet according to the repulsive force, the minimum gap, and the permanent magnet diameter includes: Determining a magnetic material property table according to the material type corresponding to the material of the permanent magnet, wherein the magnetic material property table is used to indicate different thickness ranges of the permanent magnet corresponding to different permanent magnet diameters and different repulsive forces; Determine a target thickness range in the magnetic material property table according to the repulsive force and the permanent magnet diameter; A target thickness set is determined within the target thickness range according to the minimum gap, and a first thickness in the target thickness set is determined as the target thickness.

5. The method according to claim 4, characterized in that Determining a target volume corresponding to the permanent magnet according to the target thickness includes: determining whether a first bearing capacity of a target object including a permanent magnet of the first thickness meets a preset bearing capacity requirement; In the case where it is determined that the first bearing capacity meets the preset bearing capacity requirement, determining the target volume according to the target thickness; In the case where it is determined that the first bearing capacity does not meet the preset bearing capacity requirement, a second thickness in the target thickness set is determined as the target thickness, and a second bearing capacity of the target object including the permanent magnet of the second thickness meets the preset bearing capacity requirement; When it is determined that the second bearing capacity meets the preset bearing capacity requirement, the target volume is determined according to the target thickness.

6. The method according to claim 1, characterized in that Determining a target volume corresponding to the permanent magnet according to the target thickness includes: When the shape of the permanent magnet is a target shape, determining a permanent magnet height of the permanent magnet; The target volume is determined according to a volume formula corresponding to the permanent magnet height, the permanent magnet diameter and the target shape.

7. A device for determining the volume of a permanent magnet, characterized in that: include: A first determination module is used to determine the repulsive force corresponding to the magnetic suspension between the permanent magnet and the wind wheel in the target object, the minimum gap between the permanent magnet and the wind wheel, and the permanent magnet diameter of the permanent magnet, wherein the minimum gap is used to indicate the minimum distance for maintaining the non-contact suspension state between the permanent magnet and the wind wheel; A second determination module is used to determine a target thickness of the permanent magnet according to the repulsive force, the minimum gap and the diameter of the permanent magnet; The third determination module is used to determine the target volume corresponding to the permanent magnet according to the target thickness.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method of any one of claims 1 to 6 when executed.

9. An electronic device, comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that The computer program is used by a processor to execute the steps of the method described in any one of claims 1 to 6.

Images