Device capable of controlling rotation area of magnetic field

Abstract

The utility model discloses a device capable of controlling a magnetic field rotation area, and relates to the technical field of magnetic field generation equipment. Comprising a first magnetic pole assembly which comprises a plurality of first orthogonal magnetic pole coils and a plurality of first limiting magnetic pole coils, and the plurality of first orthogonal magnetic pole coils and the plurality of first limiting magnetic pole coils are uniformly distributed around a first preset circumference; the second magnetic pole assembly comprises a plurality of second orthogonal magnetic pole coils and a plurality of second limiting magnetic pole coils, the plurality of second orthogonal magnetic pole coils are uniformly distributed around a second preset circumference, and the second preset circumference and the first preset circumference have the same diameter and are perpendicular to each other; wherein a periodic rotating magnetic field can be generated in a state in which a time-varying current with a phase difference of 90 DEG is input to the first and second orthogonal magnetic poles, and a space volume of the periodic rotating magnetic field can be limited in a state in which a set direct current is input to the two limiting pole coils. According to the utility model, the magnetic field can be controlled to periodically rotate in a specific target space.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic field generating equipment, and particularly relates to a device capable of controlling the rotation area of a magnetic field. Background Technique

[0002] The rotating magnetic field technology has characteristics such as convenient controllability and non-destructive inspection, and is widely used in fields such as the motor industry, industrial inspection, medical examination, biomedical diagnosis and treatment. The common magnetic field rotation technology is mainly realized by the orthogonal combination excitation of magnetic coils, and the magnetic field is generated by a coil through which alternating current passes. By arranging two groups of coils placed vertically and applying alternating currents with a 90° phase difference to the two groups of coils, a rotating magnetic field is vectorially superimposed in the interaction area of the coil magnetic fields.

[0003] Among them, although the existing single-group orthogonal magnetic rotation technology can control the rotation of the magnetic field, in actual applications, a rotating magnetic field is generated integrally inside the enclosed volume of the pole coil, making the magnetic field rotation area uncontrollable, which limits the development of the rotating magnetic field in application fields such as positioning detection. Content of the Utility Model

[0004] Aiming at the technical problem that the magnetic rotation area generated by the existing magnetic field rotation technology is uncontrollable, the utility model provides a device capable of controlling the magnetic field rotation area, which can control the magnetic field to perform periodic rotation in a specific target space, so that the rotation area of the rotating magnetic field is controllable, and promotes the development of the rotating magnetic field in application fields such as positioning detection.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model provides a device capable of controlling the magnetic field rotation area, including: a first pole assembly, the first pole assembly includes a plurality of first orthogonal pole coils and a plurality of first limiting pole coils, and the plurality of first orthogonal pole coils and the plurality of first limiting pole coils are both evenly distributed around a first preset circumference; a second pole assembly, the second pole assembly includes a plurality of second orthogonal pole coils and a plurality of second limiting pole coils, the plurality of second orthogonal pole coils are evenly distributed around a second preset circumference, and the second preset circumference has the same diameter as the first preset circumference and is perpendicular to each other; wherein, in the state of inputting currents with time sequence change and a phase difference of 90° to the first orthogonal pole and the second orthogonal pole, a periodic rotating magnetic field can be generated in a set space, and in the state of inputting set direct currents to the first limiting pole coil and the second limiting pole coil, the space volume of the periodic rotating magnetic field can be limited.

[0007] It should be noted that although the existing single-group orthogonal magnetic rotation technology can control the rotation of the magnetic field, in practical applications, a rotating magnetic field is generated inside the volume surrounded by the pole coils, making the rotation area of the magnetic field uncontrollable, which limits the development of the rotating magnetic field in application fields such as positioning detection.

[0008] In view of this, the device for controlling the rotation area of the magnetic field provided by the present utility model includes a first pole assembly and a second pole assembly. The first pole assembly includes a plurality of first orthogonal pole coils and a plurality of first limiting pole coils, and the plurality of first orthogonal pole coils and the plurality of first limiting pole coils are all evenly distributed around a first preset circumference. The second pole assembly includes a plurality of second orthogonal pole coils and a plurality of second limiting pole coils, and the plurality of second orthogonal pole coils are evenly distributed around a second preset circumference. The second preset circumference has the same diameter as the first preset circumference and is perpendicular to each other. Thus, when currents with time-sequential changes and a phase difference of 90° are input to the first orthogonal poles and the second orthogonal poles, a periodic rotating magnetic field is generated in the set space. At the same time, when set DC currents are input to the first limiting pole coils and the second limiting pole coils, the first limiting pole coils and the second limiting pole coils generate a directional magnetic field that does not change with the period, so as to limit the space volume of the periodic rotating magnetic field through the repulsive or attractive action between the magnetic fields generated by the first limiting pole coils and the second limiting pole coils.

[0009] Among them, the direction and the magnitude of the magnetic field intensity of the magnetic fields generated by the first limiting pole coils and the second limiting pole coils can be realized by controlling the input currents, so that the rotation area of the rotating magnetic field is controllable, which promotes the development of the rotating magnetic field in application fields such as positioning detection.

[0010] In addition, due to the characteristic of the magnetic field diverging in space, the existing orthogonal rotating magnetic field has insufficient magnetic field intensity in the deep space when applied to situations such as detection or positioning of the treatment center, which limits its practical application. In the present utility model, when currents with time-sequential changes and a phase difference of 90° are input to the first orthogonal poles and the second orthogonal poles, a rotating magnetic field with the same frequency can be generated simultaneously to produce vector superposition at the spatial rotation center, thereby strengthening the intensity of the central rotating magnetic field and ensuring that the magnetic field in the deep space has sufficient intensity to further promote the practical application of the rotating magnetic field.

[0011] In an optional embodiment of the present application, the first orthogonal pole coils and the first limiting pole coils are arranged at intervals and cross each other in turn, and the distance between each first limiting pole coil and the corresponding first orthogonal pole coil is the same.

[0012] In an alternative embodiment of the present application, the plurality of second limiting magnetic pole coils are arranged in an interleaved manner with the second orthogonal magnetic pole coils, and the distance between each second limiting magnetic pole coil and the corresponding second orthogonal magnetic pole coil is the same.

[0013] In an alternative embodiment of the present application, the first limiting magnetic pole coils are provided at the intersections of the first magnetic pole assembly and the second magnetic pole assembly, and the distance from each first limiting magnetic pole coil located at the intersection of the first magnetic pole assembly and the second magnetic pole assembly to the corresponding second orthogonal magnetic pole coil, and the distance between each first limiting magnetic pole coil and the corresponding first orthogonal magnetic pole coil are the same.

[0014] In an alternative embodiment of the present application, the first magnetic pole assembly further includes a first connecting bridge, and both the first orthogonal magnetic pole coil and the first limiting magnetic pole coil are mounted on the first connecting bridge.

[0015] In an alternative embodiment of the present application, the first connecting bridge includes a plurality of first magnetic conduction fixing bridges and a plurality of first magnetic insulation fixing bridges. The first orthogonal magnetic pole coil is mounted on the first magnetic conduction fixing bridge, and the first limiting magnetic pole coil is mounted on the first magnetic insulation fixing bridge.

[0016] In an alternative embodiment of the present application, the first connecting bridge is in a ring structure, and the first magnetic conduction fixing bridges and the first magnetic insulation fixing bridges are arranged in a sequentially spaced and crosswise manner, and the distance between each first magnetic conduction fixing bridge and the corresponding first magnetic insulation fixing bridge is the same.

[0017] In an alternative embodiment of the present application, the second magnetic pole assembly further includes a second connecting bridge, and both the second orthogonal magnetic pole coil and the second limiting magnetic pole coil are mounted on the second connecting bridge.

[0018] In an alternative embodiment of the present application, the second connecting bridge includes a plurality of second magnetic conduction fixing bridges and a plurality of second magnetic insulation fixing bridges. The second orthogonal magnetic pole coil is mounted on the second magnetic conduction fixing bridge, and the second limiting magnetic pole coil is mounted on the second magnetic insulation fixing bridge.

[0019] In an alternative embodiment of the present application, the second connecting bridge is in a ring structure, and the second magnetic conduction fixing bridges and the second magnetic insulation fixing bridges are arranged in a sequentially spaced and crosswise manner, and the distance between each second magnetic conduction fixing bridge and the corresponding second magnetic insulation fixing bridge is the same.

[0020] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0021] 1. The device for controlling the rotation area of a magnetic field provided by the present utility model includes a first magnetic pole assembly and a second magnetic pole assembly. The first magnetic pole assembly includes a plurality of first orthogonal magnetic pole coils and a plurality of first limiting magnetic pole coils, and the plurality of first orthogonal magnetic pole coils and the plurality of first limiting magnetic pole coils are evenly distributed around a first preset circumference. The second magnetic pole assembly includes a plurality of second orthogonal magnetic pole coils and a plurality of second limiting magnetic pole coils, and the plurality of second orthogonal magnetic pole coils are evenly distributed around a second preset circumference. The second preset circumference has the same diameter as the first preset circumference and is perpendicular to each other. Thus, when currents with a time-sequential change and a 90° phase difference are input to the first orthogonal magnetic poles and the second orthogonal magnetic poles, a periodic rotating magnetic field is generated within a set space. At the same time, when a set DC current is input to the first limiting magnetic pole coils and the second limiting magnetic pole coils, the first limiting magnetic pole coils and the second limiting magnetic pole coils generate a directional magnetic field that does not change with the period. Thus, through the repulsive or attractive effect between the magnetic field generated by the first limiting magnetic pole coils and the second limiting magnetic pole coils and the periodic rotating magnetic field, the spatial volume of the periodic rotating magnetic field is restricted. Moreover, the direction and the magnitude of the magnetic field intensity of the magnetic field generated by the first limiting magnetic pole coils and the second limiting magnetic pole coils can be achieved by controlling the current input thereto. Furthermore, the rotation area of the rotating magnetic field can be controlled, promoting the development of the rotating magnetic field in application fields such as positioning detection.

[0022] 2. When currents with a time-sequential change and a 90° phase difference are input to the first orthogonal magnetic poles and the second orthogonal magnetic poles, the device for controlling the rotation area of a magnetic field provided by the present utility model can simultaneously generate a rotating magnetic field with the same frequency to produce vector superposition at the spatial rotation center, thereby strengthening the intensity of the central rotating magnetic field and ensuring that the magnetic field in the deep space has sufficient intensity to further promote the practical application of the rotating magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] In the drawings:

[0025] Figure 1 is a three-dimensional structural schematic diagram of the device for controlling the rotation area of a magnetic field according to an embodiment of the present utility model;

[0026] Figure 2 is a top-view structural schematic diagram of the device for controlling the rotation area of a magnetic field according to an embodiment of the present utility model;

[0027] Figure 3This is a right - view structural schematic diagram of the device for controlling the magnetic - field rotation area in the embodiment of the present utility model.

[0028] Marks in the attached drawings and corresponding component names:

[0029] 10 - First magnetic - pole assembly, 11 - First orthogonal magnetic - pole coil, 12 - First limiting magnetic - pole coil, 13 - First connection bridge, 13a - First magnetic - conduction fixed bridge, 13b - First magnetic - insulation fixed bridge, 20 - Second magnetic - pole assembly, 21 - Second orthogonal magnetic - pole coil, 22 - Second limiting magnetic - pole coil, 23 - Second connection bridge, 23a - Second magnetic - conduction fixed bridge, 23b - Second magnetic - insulation fixed bridge. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0032] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0033] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present utility model can be understood according to specific circumstances.

[0034] It should be noted that although the existing single-group orthogonal magnetic rotation technology can control the rotation of the magnetic field, in practical applications, a rotating magnetic field is generated as a whole inside the volume surrounded by the pole coils, making the magnetic field rotation area uncontrollable and restricting the development of the rotating magnetic field in application fields such as positioning detection.

[0035] To solve the above problems, the inventor innovatively designs the following technical solutions. The specific implementation solutions of this application will be described in detail below with reference to the accompanying drawings.

[0036] Embodiment

[0037] Combined with Figure 1 , this embodiment provides a device capable of controlling the magnetic field rotation area, including: a first magnetic pole assembly 10, the first magnetic pole assembly 10 includes a plurality of first orthogonal magnetic pole coils 11 and a plurality of first limiting magnetic pole coils 12, and the plurality of first orthogonal magnetic pole coils 11 and the plurality of first limiting magnetic pole coils 12 are both evenly distributed around a first preset circumference; a second magnetic pole assembly 20, the second magnetic pole assembly 20 includes a plurality of second orthogonal magnetic pole coils 21 and a plurality of second limiting magnetic pole coils 22, the plurality of second orthogonal magnetic pole coils 21 are evenly distributed around a second preset circumference, and the second preset circumference has the same diameter as the first preset circumference and is perpendicular to each other; wherein, in a state where currents with time-sequential changes and a phase difference of 90° are input to the first orthogonal magnetic poles and the second orthogonal magnetic poles, a periodic rotating magnetic field can be generated within a set space, and in a state where set direct currents are input to the first limiting magnetic pole coils 12 and the second limiting magnetic pole coils 22, the spatial volume of the periodic rotating magnetic field can be restricted.

[0038] It should be understood that when this embodiment is in operation, it also includes an exciting current control system to facilitate the application of currents to each magnetic pole coil. At the same time, to ensure the vector action effect between magnetic fields, the exciting current must have time-sequentiality according to the design requirements. The control of the exciting current for the rotating magnetic field is common knowledge for those skilled in the art and is not the technical solution claimed in this application, so this embodiment will not be introduced in detail.

[0039] Generally speaking, the first orthogonal magnetic pole coils 11 and the first limiting magnetic pole coils 12 are arranged at intervals and cross each other in turn, and the distance between each first limiting magnetic pole coil 12 and the corresponding first orthogonal magnetic pole coil 11 is the same.

[0040] Correspondingly, the plurality of second limiting magnetic pole coils 22 are arranged staggered with the second orthogonal magnetic pole coils 21, and the distance between each second limiting magnetic pole coil 22 and the corresponding second orthogonal magnetic pole coil 21 is the same.

[0041] In this embodiment, the first limiting magnetic pole coil 12 is provided at the intersection of the first magnetic pole assembly 10 and the second magnetic pole assembly 20, and the distance from each first limiting magnetic pole coil 12 at the intersection of the first magnetic pole assembly 10 and the second magnetic pole assembly 20 to the corresponding second orthogonal magnetic pole coil 21, and the distance between each first limiting magnetic pole coil 12 and the corresponding first orthogonal magnetic pole coil 11 are the same.

[0042] Combined with Figure 2 and Figure 3 , the first magnetic pole assembly 10 further includes a first connection bridge 13, and both the first orthogonal magnetic pole coil 11 and the first limiting magnetic pole coil 12 are mounted on the first connection bridge 13.

[0043] It can be understood that the first connection bridge 13 includes a plurality of first magnetic conduction fixing bridges 13a and a plurality of first magnetic insulation fixing bridges 13b. The first orthogonal magnetic pole coil 11 is mounted on the first magnetic conduction fixing bridge 13a, and the first limiting magnetic pole coil 12 is mounted on the first magnetic insulation fixing bridge 13b.

[0044] Specifically, the first connection bridge 13 is of an annular structure, and the first magnetic conduction fixing bridges 13a and the first magnetic insulation fixing bridges 13b are arranged at intervals and cross each other in sequence, and the distance between each first magnetic conduction fixing bridge 13a and the corresponding first magnetic insulation fixing bridge 13b is the same.

[0045] Correspondingly, the second magnetic pole assembly 20 further includes a second connection bridge 23, and both the second orthogonal magnetic pole coil 21 and the second limiting magnetic pole coil 22 are mounted on the second connection bridge 23.

[0046] Combined with Figure 1 and Figure 2 , the second connection bridge 23 includes a plurality of second magnetic conduction fixing bridges 23a and a plurality of second magnetic insulation fixing bridges 23b. The second orthogonal magnetic pole coil 21 is mounted on the second magnetic conduction fixing bridge 23a, and the second limiting magnetic pole coil 22 is mounted on the second magnetic insulation fixing bridge 23b.

[0047] It can be understood that the second connection bridge 23 is of an annular structure, and the second magnetic conduction fixing bridges 23a and the second magnetic insulation fixing bridges 23b are arranged at intervals and cross each other in sequence, and the distance between each second magnetic conduction fixing bridge 23a and the corresponding second magnetic insulation fixing bridge 23b is the same. The magnetic conduction fixing bridges are all made of magnetic conduction materials to guide the magnetic fields generated by the orthogonal magnetic pole coils, facilitating the generation of a rotating magnetic field; while for the magnetic insulation fixing bridges, non-magnetic conduction materials are used, which can play a role in shielding the magnetic field to facilitate the precise control of the rotation area of the rotating magnetic field.

[0048] That is to say, in this embodiment, each coil arrangement adopts a circular track surrounding connection and fixation. The relative positions of the magnetic path coils are symmetric with respect to the circle where the track is located, and the centers of the coils all point to the same center of the circle. Moreover, each orthogonal pole coil is embedded in each connecting fixed bridge, and the orthogonal pole coils are all located in their respective orthogonal planes and arranged in a symmetric cross shape. Each limiting pole coil is embedded in the magnetic bridge, and is arranged at intervals with the orthogonal pole coils, and is arranged in a symmetric cross shape in its respective orthogonal plane.

[0049] It should be noted that, in this embodiment, the fixed bridge and the magnetic bridge form a connecting bridge on the same spherical surface, and intersect at the position of the first limiting pole coil 12 in the orthogonal plane, that is, a limiting pole coil is shared at the intersection. Generally, the coils of a magnetic pole assembly are composed of 4 orthogonal pole coils and 4 limiting pole coils.

[0050] In a specific application, each orthogonal pole coil and each limiting pole coil are wound with circular copper wires with a diameter of 1 mm, and the number of turns of each coil is 30. The inner diameter of all coils is 5 cm, the outer diameter is 8 cm, and the coil height is 10 cm. Each connecting bridge is segmented by a magnetic conductive material and a non-magnetic conductive material to form a smooth ring with an inner diameter of 92 cm, a ring thickness of 12 cm, and a height of 10 cm. Of course, connecting bridges and pole coils of other specifications can also be used.

[0051] Generally speaking, the coils are embedded and fixed with the connecting bridge by means of tolerance fit. Among them, the connecting bridge segments into which the orthogonal pole coils are embedded are made of magnetic conductive materials, and the connecting bridge segments into which the limiting pole coils are embedded are made of non-magnetic conductive materials. To ensure that the rotating magnetic field and the limiting magnetic field at the boundary reach the expected effect, the length of the magnetic conductive connecting and fixing bridge is twice the length of the non-magnetic conductive connecting and fixing bridge. Of course, it can also be other ratios.

[0052] During use, the phase difference of the excitation currents of the first orthogonal pole coil 11 and the second orthogonal pole coil 21 is 90°. In a specific application, alternating currents of I0 = 1000√2 * sin(2π * 6280 * time) A and I1 = 1000√2 * cos(2π * 6280 * time + 90°) A are respectively passed through. For all the limiting pole coils (the first limiting pole coil 12 and the second limiting pole coil 22) in the device, a direct current of I2 = 800 A is passed through. Of course, currents with other characteristics can also be input, depending on the specific application scenario.

[0053] In summary, the device for controlling the rotation region of the magnetic field provided in this embodiment includes a first magnetic pole assembly 10 and a second magnetic pole assembly 20. The first magnetic pole assembly 10 includes a plurality of first orthogonal magnetic pole coils 11 and a plurality of first limiting magnetic pole coils 12. The plurality of first orthogonal magnetic pole coils 11 and the plurality of first limiting magnetic pole coils 12 are both evenly distributed around a first preset circumference. The second magnetic pole assembly 20 includes a plurality of second orthogonal magnetic pole coils 21 and a plurality of second limiting magnetic pole coils 22. The plurality of second orthogonal magnetic pole coils 21 are evenly distributed around a second preset circumference. The second preset circumference has the same diameter as the first preset circumference and is perpendicular to each other.

[0054] When currents with time-sequential changes and a phase difference of 90° are input to the first orthogonal magnetic poles and the second orthogonal magnetic poles, so that the first magnetic pole assembly 10 and the second magnetic pole assembly 20 generate rotating magnetic fields in their respective coil planes. Through the superposition or cancellation of magnetic field vectors, a combined rotating magnetic field is formed to generate a periodic rotating magnetic field in the set space. At the same time, when a set DC current is input to the first limiting magnetic pole coil 12 and the second limiting magnetic pole coil 22, the first limiting magnetic pole coil 12 and the second limiting magnetic pole coil 22 generate a directional magnetic field that does not change with the period. Thus, through the repulsion or attraction effect (vector superposition) between the magnetic fields generated by the first limiting magnetic pole coil 12 and the second limiting magnetic pole coil 22 and the periodic rotating magnetic field, the spatial volume of the periodic rotating magnetic field is restricted.

[0055] Among them, the direction and the magnitude of the magnetic field intensity of the magnetic fields generated by the first limiting magnetic pole coil 12 and the second limiting magnetic pole coil 22 can be achieved by controlling the input currents, thereby making the rotation region of the rotating magnetic field controllable and promoting the development of the rotating magnetic field in application fields such as positioning detection.

[0056] At the same time, when currents with time-sequential changes and a phase difference of 90° are input to the first orthogonal magnetic poles and the second orthogonal magnetic poles, rotating magnetic fields with the same frequency can be generated simultaneously to produce vector superposition at the spatial rotation center, thereby strengthening the intensity of the central rotating magnetic field and ensuring that the magnetic field in the deep space has sufficient intensity to further promote the practical application of the rotating magnetic field.

[0057] Moreover, by adjusting the amplitude and frequency of the excitation currents of the first orthogonal magnetic poles and the second orthogonal magnetic poles and the amplitude parameters of the excitation currents of the first limiting magnetic pole coil 12 and the second limiting magnetic pole coil 22, the spatial range of the central rotating magnetic field is regulated and the magnetic field periodic rotation rate is adjusted to meet the usage requirements of different application scenarios.

[0058] The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above description is only the specific embodiments of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for controlling the magnetic field rotation area, characterized in that Comprising: A first magnetic pole assembly (10), the first magnetic pole assembly (10) includes a plurality of first orthogonal magnetic pole coils (11) and a plurality of first limiting magnetic pole coils (12), and the plurality of first orthogonal magnetic pole coils (11) and the plurality of first limiting magnetic pole coils (12) are both evenly distributed around a first preset circumference; a second magnetic pole assembly (20), the second magnetic pole assembly (20) includes a plurality of second orthogonal magnetic pole coils (21) and a plurality of second limiting magnetic pole coils (22), the plurality of second orthogonal magnetic pole coils (21) are evenly distributed around a second preset circumference, and the second preset circumference has the same diameter as the first preset circumference and is perpendicular to each other; wherein, in a state where currents with time-sequential changes and a phase difference of 90° are input to the first orthogonal magnetic pole coil and the second orthogonal magnetic pole coil, a periodic rotating magnetic field can be generated within a set space, and in a state where set direct currents are input to the first limiting magnetic pole coil (12) and the second limiting magnetic pole coil (22), the spatial volume of the periodic rotating magnetic field can be restricted.

2. The device for controlling the rotation region of the magnetic field according to claim 1, wherein The first orthogonal magnetic pole coils (11) and the first limiting magnetic pole coils (12) are arranged at intervals and cross each other in sequence, and the distance between each first limiting magnetic pole coil (12) and the corresponding first orthogonal magnetic pole coil (11) is the same.

3. The device for controlling the rotation area of the magnetic field according to claim 2, wherein The plurality of second limiting magnetic pole coils (22) are arranged in a staggered manner with the second orthogonal magnetic pole coils (21), and the distance between each second limiting magnetic pole coil (22) and the corresponding second orthogonal magnetic pole coil (21) is the same.

4. The device for controlling the rotation area of the magnetic field according to claim 3, wherein The first limiting magnetic pole coils (12) are provided at the intersections of the first magnetic pole assembly (10) and the second magnetic pole assembly (20), and the distance from each first limiting magnetic pole coil (12) located at the intersection of the first magnetic pole assembly (10) and the second magnetic pole assembly (20) to the corresponding second orthogonal magnetic pole coil (21) is the same as the distance between each first limiting magnetic pole coil (12) and the corresponding first orthogonal magnetic pole coil (11).

5. The device for controlling the rotation region of the magnetic field according to any one of claims 1 to 4, wherein The first magnetic pole assembly (10) further includes a first connecting bridge (13), and the first orthogonal magnetic pole coils (11) and the first limiting magnetic pole coils (12) are both installed on the first connecting bridge (13).

6. The device for controlling the rotation region of the magnetic field according to claim 5, characterized in that The first connecting bridge (13) includes a plurality of first magnetic conduction fixing bridges (13a) and a plurality of first magnetic insulation fixing bridges (13b), the first orthogonal magnetic pole coils (11) are installed on the first magnetic conduction fixing bridges (13a), and the first limiting magnetic pole coils (12) are installed on the first magnetic insulation fixing bridges (13b).

7. The device for controlling the rotation area of the magnetic field according to claim 6, characterized in that, The first connecting bridge (13) is of an annular structure, and the first magnetic conduction fixing bridges (13a) and the first magnetic insulation fixing bridges (13b) are arranged at intervals and cross each other in sequence, and the distance between each first magnetic conduction fixing bridge (13a) and the corresponding first magnetic insulation fixing bridge (13b) is the same.

8. The device for controlling the rotation region of the magnetic field according to claim 5, characterized in that, The second magnetic pole assembly (20) further includes a second connecting bridge (23), and the second orthogonal magnetic pole coils (21) and the second limiting magnetic pole coils (22) are both installed on the second connecting bridge (23).

9. The device for controlling the rotation area of the magnetic field according to claim 8, wherein The second connecting bridge (23) includes a plurality of second magnetic conduction fixing bridges (23a) and a plurality of second magnetic insulation fixing bridges (23b). The second orthogonal magnetic pole coil (21) is mounted on the second magnetic conduction fixing bridge (23a), and the second limiting magnetic pole coil (22) is mounted on the second magnetic insulation fixing bridge (23b).

10. The device for controlling the rotation area of the magnetic field according to claim 9, wherein, The second connecting bridge (23) is of an annular structure, and the second magnetic conduction fixing bridges (23a) and the second magnetic insulation fixing bridges (23b) are arranged at intervals and cross each other in sequence, and the distance between each second magnetic conduction fixing bridge (23a) and the corresponding second magnetic insulation fixing bridge (23b) is the same.

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