Magnetic levitation device

Abstract

The present invention discloses a magnetic levitation device, comprising a base module, a levitation module, and a control module. The base module includes a radially magnetized first magnet; the levitation module includes a radially magnetized second magnet; the first magnet exhibits a first magnetic polarity on its inner side and a second magnetic polarity on its outer side, the first and second magnetic polarities being opposite; the second magnet exhibits a third magnetic polarity on its inner side and a fourth magnetic polarity on its outer side, the third and fourth magnetic polarities being opposite; the levitation module can be suspended above the base module; the control module is used to maintain the levitation module in stable suspension. The device has advantages such as strong levitation force and good levitation stability.

Description

Technical Field

[0001] The present invention relates to the field of magnetic suspension technology, in particular to a magnetic suspension device. Background Art

[0002] Current magnetic levitation devices utilize the principle of "like repels like" to ensure that the upper surface of the base and the lower surface of the levitation module have the same polarity. This principle of like repels like creates a magnetic repulsive force to balance the weight of the levitation module and keep it suspended. However, this method has limited levitation performance and requires the levitation module to have a uniform volume and weight distribution. It can only carry specific objects with regular shapes, such as coins and cup lids. Once there is a small offset, the magnetic flux lines passing through the levitation module will change rapidly, resulting in loss of balance and poor levitation stability. In addition, because the levitation module is located at the location on the base where the magnetic field lines are most dense, if the position of the levitation module changes, the magnetic flux passing through the levitation module will also change rapidly, resulting in a more obvious eddy current phenomenon and heat generation, which will affect the effective use of energy.

[0003] Alternatively, the magnetic properties near the annular surface of the annular magnet are opposite to those within a predetermined region outside the annular surface. For example, if the polarity of the upper surface of a horizontally placed annular magnet is S, then the polarity of a predetermined region above the annular magnet is N, and the strength of the polarity N in this region changes with the vertical or horizontal position. Thus, the central magnetic force of the annular magnet can be used to support (repel) an object and allow it to be levitated and rotated horizontally without the need for an additional placement mechanism, as described in the invention patent with the number ZL200610065336.1. However, this method utilizes the repulsion between opposite polarities, that is, the repulsive force generated by the specific region above the base with opposite polarity and the levitation module to achieve levitation. The magnetic repulsion that can be provided is still limited. Moreover, the density of the magnetic field lines at the levitation module is still relatively dense. If the levitation module experiences a certain horizontal offset or tilt, the eddy current loss generated is still relatively large. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the technical problems existing in the prior art, the present invention provides a magnetic levitation device with strong levitation force and good levitation stability.

[0005] In order to solve the above technical problems, the technical solution proposed in the present invention is as follows: a magnetic levitation device, comprising a base module, a levitation module and a control module;

[0006] The base module includes a radially magnetized first magnet;

[0007] The suspension module includes a radially magnetized second magnet;

[0008] The inner side of the first magnet exhibits a first magnetic polarity, and the outer side exhibits a second magnetic polarity, and the first magnetic polarity and the second magnetic polarity are opposite;

[0009] The inner side of the second magnet exhibits a third magnetic polarity, and the outer side exhibits a fourth magnetic polarity, and the third magnetic polarity is opposite to the fourth magnetic polarity;

[0010] The suspension module can be suspended above the base module; the control module is used to keep the suspension module stably suspended.

[0011] Furthermore, the first magnetic polarity is the same as the third magnetic polarity, and the second magnetic polarity is the same as the fourth magnetic polarity.

[0012] Furthermore, the first magnetic polarity is opposite to the third magnetic polarity, and the second magnetic polarity is opposite to the fourth magnetic polarity.

[0013] Furthermore, the base module includes a first magnetic shielding plate and a bottom plate, the first magnetic shielding plate is located above the bottom plate, and an equipment installation space is formed between the first magnetic shielding plate and the bottom plate; the first magnet is arranged above the first magnetic shielding plate; the control module includes a float deflection sensor, an electromagnet and a control circuit, the float deflection sensor and the electromagnet are arranged above the first magnetic shielding plate, and the control circuit is arranged between the first magnetic shielding plate and the bottom plate.

[0014] Furthermore, the suspension module includes a second magnetic shielding plate, and the second magnetic shielding plate is located above the second magnet.

[0015] Furthermore, the float deflection sensor is a Hall sensor.

[0016] Furthermore, the first magnet is a single annular magnet, or is composed of at least three independent magnets arranged in a ring shape.

[0017] Furthermore, the second magnet is a single annular magnet, or is composed of at least three independent magnets arranged in a ring shape.

[0018] Furthermore, the weight of the suspension module is greater than 1 gram.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. The base module and suspension module of the present invention both use radially magnetized magnets, and the suspension module is suspended by the magnetic repulsion generated by the magnetic field between the base module and the suspension module. Since the radially magnetized magnets can form a strong magnetic field on their upper or lower surface areas, they can generate a strong magnetic repulsion on the suspension module, thereby making the magnetic suspension device have a greater suspension force, a higher suspension height, and a greater load capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the first specific embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the main structure and a cross-sectional view of a specific embodiment of the present invention.

[0023] Figure 3 In the specific embodiment 1 of the present invention Figure 2 sectional view of .

[0024] Figure 4 Schematic diagram of the magnetic polarity of each magnet in the first specific embodiment of the present invention.

[0025] Figure 5 Schematic diagram of magnetic field distribution of a base module in a specific embodiment of the present invention Figure 1 .

[0026] Figure 6 Schematic diagram of magnetic field distribution in a suspended state in a specific embodiment of the present invention Figure 2 .

[0027] Figure 7 Schematic diagram of magnetic lines of force according to a first specific embodiment of the present invention.

[0028] Figure 8 Schematic diagram of the magnetic polarity of each magnet in the second specific embodiment of the present invention.

[0029] Figure 9 Schematic diagram of magnetic field distribution in a suspended state according to a second specific embodiment of the present invention.

[0030] Figure 10 Schematic diagram of magnetic lines of force according to the second specific embodiment of the present invention.

[0031] Description of the drawings: 1. First magnet; 2. Second magnet; 3. Electromagnet; 4. Control circuit; 5. First magnetic shielding plate; 6. Bottom plate; 7. Second magnetic shielding plate. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0033] Example 1:

[0034] The magnetic suspension device of this embodiment, such as Figure 1 、 Figure 2 and Figure 3As shown, it includes a base module, a suspension module and a control module; the base module includes a radially magnetized first magnet 1; the suspension module includes a radially magnetized second magnet 2; the inner side of the first magnet 1 exhibits a first magnetic polarity, and the outer side exhibits a second magnetic polarity, and the first magnetic polarity and the second magnetic polarity are opposite; the inner side of the second magnet 2 exhibits a third magnetic polarity, and the outer side exhibits a fourth magnetic polarity, and the third magnetic polarity and the fourth magnetic polarity are opposite; the suspension module can be suspended above the base module; the control module is used to keep the suspension module stably suspended.

[0035] In this embodiment, the first magnetic polarity is opposite to the third magnetic polarity, and the second magnetic polarity is opposite to the fourth magnetic polarity. Figure 4 As shown, the inner magnetic polarity of the first magnet 1 is the S pole, and the outer magnetic polarity is the N pole; the inner magnetic polarity of the second magnet 2 is the N pole, and the outer magnetic polarity is the S pole. Of course, the opposite can also be true: the inner magnetic polarity of the first magnet 1 is the N pole, and the outer magnetic polarity is the S pole; the inner magnetic polarity of the second magnet 2 is the S pole, and the outer magnetic polarity is the N pole.

[0036] In this embodiment, for Figure 4 The magnetic polarity setting method shown in the figure is as follows: Figure 5 As shown, when the suspension module is suspended above the base module, its magnetic field distribution is as follows Figure 6 The distribution of magnetic lines of force is shown in Figure 7 As shown. Figure 5 、 Figure 6 and Figure 7 It can be seen that a strong magnetic field can be generated in the area near the upper surface or lower surface of the first magnet 1 of the base module. Figure 6 and Figure 7 It can be determined that the magnetic field distribution curve and magnetic lines of force are relatively dense between the first magnet 1 of the base module and the second magnet 2 of the levitation module. Therefore, a strong magnetic repulsion force can be generated between the first magnet 1 and the second magnet 2, thereby providing the magnetic levitation device with greater levitation force, a higher levitation height, and a greater load capacity. Moreover, through experimental comparative analysis, the technical solution of this embodiment has higher levitation stability and a larger stable levitation area than the levitation solution achieved by using axially magnetized magnets in both the base module and the levitation module.

[0037] In this embodiment, the base module includes a first magnetic shielding plate 5 and a bottom plate 6. The first magnetic shielding plate 5 is positioned above the bottom plate 6, forming a device installation space between the first magnetic shielding plate 5 and the bottom plate 6. The first magnet 1 is positioned above the first magnetic shielding plate 5. The control module includes a float deflection sensor, an electromagnet 3, and a control circuit 4. The float deflection sensor and electromagnet 3 are positioned above the first magnetic shielding plate 5, and the control circuit 4 is positioned between the first magnetic shielding plate 5 and the bottom plate 6. In this embodiment, the suspension module includes a second magnetic shielding plate 7, positioned above the second magnet 2. The first magnetic shielding plate 5 separates the first magnet 1 from the control circuit 4 of the control module, thereby forming a region of reduced magnetic field strength below the first magnetic shielding plate 5. This effectively prevents the magnetic fields of the first magnet 1 or the second magnet 2 from interfering with the control circuit 4, thereby improving the operational stability of the control circuit 4. The float deflection sensor is not shown in the figure. By providing the second magnetic shielding plate 7, a region with a smaller magnetic field strength can be formed above the second magnet 2, thereby providing a good operating environment for the electronic equipment when the suspension module needs to carry other electronic equipment, and reducing the interference of the magnetic field on the electronic equipment.

[0038] In this embodiment, the float deflection sensor is preferably a Hall effect sensor. It detects the levitation module's position and provides this position to the control circuit 4, which then controls the electromagnet 3 to generate a corresponding magnetic field, thereby ensuring that the levitation module remains stably suspended above the base. Of course, other sensors capable of measuring the levitation module's position can also serve as the float deflection sensor.

[0039] In the present embodiment, the first magnet 1 is a single annular magnet, or is arranged in a ring shape by at least three independent magnets. The second magnet 2 is a single annular magnet, or is arranged in a ring shape by at least three independent magnets. A single annular magnet refers to a magnet in the shape of an annular ring. However, since the production cost of a single annular magnet is relatively high and the production difficulty is relatively large, in the present embodiment, the annular magnet is preferably arranged in a ring shape by three or more independent magnets. On the one hand, it can reduce costs, and on the other hand, it can also make the shape and size of the arranged annular ring not limited by the physical shape of the magnet itself, and has better flexibility. The annular ring referred to in the present embodiment includes not only regular circular rings, but also other shapes such as ellipses, rectangles, and regular polygons. Of course, when the magnets are regularly arranged, the algorithm for achieving stable suspension control through the control circuit 4 is relatively simpler and easier to implement.

[0040] In this embodiment, further preferably, the weight of the suspension module is greater than 1 gram.

[0041] Example 2:

[0042] The second embodiment is basically the same as the first embodiment, except that the magnetic polarity settings of the first magnet 1 and the second magnet 2 are different. Therefore, the same contents as those of the first embodiment will not be repeated in this embodiment.

[0043] In this embodiment, the first magnetic polarity is the same as the third magnetic polarity, and the second magnetic polarity is the same as the fourth magnetic polarity. Figure 8 As shown, Figure 8 Based on Figure 2 Schematic diagram of the magnetic polarity of the structure shown in section AA. The inner magnetic polarity of the first magnet 1 is S, and the outer magnetic polarity is N; the inner magnetic polarity of the second magnet 2 is S, and the outer magnetic polarity is N. Of course, the opposite can also be true: the inner magnetic polarity of the first magnet 1 is N, and the outer magnetic polarity is S; the inner magnetic polarity of the second magnet 2 is N, and the outer magnetic polarity is S.

[0044] In this embodiment, for Figure 8 The magnetic polarity setting method shown in the figure is as follows. Through simulation calculation, when the suspension module is suspended above the base module, its magnetic field distribution is as follows Figure 9 The distribution of magnetic lines of force is shown in Figure 10 As shown. Figure 9 and Figure 10 It can be seen that the magnetic field distribution curve and magnetic lines of force between the first magnet 1 and the second magnet 2 are relatively dense. Therefore, a strong magnetic repulsion force can be generated between the first magnet 1 and the second magnet 2, resulting in a greater levitation force, a higher levitation height, and a greater load capacity. Moreover, through experimental comparison and analysis, the technical solution of this embodiment has higher levitation stability and a larger stable levitation area than the levitation solution achieved by using axially magnetized magnets in both the base module and the levitation module.

[0045] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed above with reference to the preferred embodiment, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent variations, and modifications to the above embodiment that do not depart from the technical solution of the present invention and are based on the technical essence of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A magnetic levitation device, characterized in that: Includes base module, suspension module and control module; The base module includes a radially magnetized first magnet; The suspension module includes a radially magnetized second magnet; The inner side of the first magnet exhibits a first magnetic polarity, and the outer side exhibits a second magnetic polarity, and the first magnetic polarity and the second magnetic polarity are opposite; The inner side of the second magnet exhibits a third magnetic polarity, and the outer side exhibits a fourth magnetic polarity, and the third magnetic polarity is opposite to the fourth magnetic polarity; The suspension module can be suspended above the base module; the control module is used to keep the suspension module stably suspended, and the weight of the suspension module is greater than 1 gram.

2. The magnetic levitation device according to claim 1, characterized in that: The first magnetic polarity is the same as the third magnetic polarity, and the second magnetic polarity is the same as the fourth magnetic polarity.

3. The magnetic levitation device according to claim 1, characterized in that: The first magnetic polarity is opposite to the third magnetic polarity, and the second magnetic polarity is opposite to the fourth magnetic polarity.

4. The magnetic levitation device according to claim 1, characterized in that: The base module includes a first magnetic shielding plate and a bottom plate, the first magnetic shielding plate is located above the bottom plate, and an equipment installation space is formed between the first magnetic shielding plate and the bottom plate; the first magnet is arranged above the first magnetic shielding plate; the control module includes a float deflection sensor, an electromagnet and a control circuit, the float deflection sensor and the electromagnet are arranged above the first magnetic shielding plate, and the control circuit is arranged between the first magnetic shielding plate and the bottom plate.

5. The magnetic levitation device according to claim 1, characterized in that: The suspension module includes a second magnetic shielding plate, and the second magnetic shielding plate is located above the second magnet.

6. The magnetic levitation device according to claim 4, characterized in that: The float deflection sensor is a Hall sensor.

7. The magnetic levitation device according to any one of claims 1 to 6, characterized in that: The first magnet is a single annular magnet, or is composed of at least three independent magnets arranged in an annular shape.

8. The magnetic levitation device according to any one of claims 1 to 6, characterized in that: The second magnet is a single annular magnet, or is composed of at least three independent magnets arranged in an annular shape.

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