Radial hybrid magnetic suspension bearing assembly and motor having the same

Abstract

The present invention provides a radial hybrid magnetic bearing assembly and a motor having the same. A permanent magnet is disposed in the first end of the outer stator core; a first radial vertical stator assembly is disposed in the second end of the outer stator core; a first radial horizontal stator assembly is disposed in the outer stator core and is located between the permanent magnet and the first radial vertical stator assembly; the rotor assembly includes a rotating shaft, and the first radial vertical stator assembly and the first radial horizontal stator assembly are used to generate an independent control magnetic field, and the control magnetic field is used to control the bias magnetic field to control the movement of the rotating shaft in a preset direction. This arrangement can avoid coupling inside the radial hybrid magnetic bearing assembly, and effectively improve the stability and reliability of the radial hybrid magnetic bearing assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic suspension bearings, and in particular to a radial hybrid magnetic suspension bearing assembly and a motor having the same. Background Art

[0002] Magnetic bearings have a series of excellent qualities such as no contact, no wear, high speed, high precision, no need for lubrication and sealing, etc. They are high-tech products integrating electromagnetism, electronic technology, control engineering, signal processing and mechanics.

[0003] Magnetic bearings are divided into three types: active, passive, and hybrid. Active magnetic bearings have high stiffness and can be precisely controlled, but the volume and power consumption required to produce unit load-bearing capacity are large. Passive magnetic bearings use the attraction or repulsion between magnetic materials to achieve rotor suspension, and have relatively low stiffness and damping. Hybrid magnetic bearings use permanent magnets to provide a bias magnetic field to replace the static bias magnetic field generated by the electromagnet in active magnetic bearings, reduce the ampere-turns of the control winding, reduce the volume of the bearing, and improve the bearing load-bearing capacity. Hybrid magnetic bearings have irreplaceable advantages in areas with strict requirements on volume and power consumption, and magnetic bearings are mainly used in high-speed and ultra-high-speed applications. Therefore, the integration and miniaturization of magnetic suspension systems and improving the stability and reliability of control systems will be key research directions.

[0004] In order to achieve contactless support for the rotor, the magnetic suspension bearing system needs to control the five degrees of freedom in its space. The traditional magnetic suspension structure uses a permanent magnet biased front radial bearing and a permanent magnet biased rear radial bearing to control the suspension control of the four degrees of freedom of the rotating shaft in the radial direction, and a permanent magnet biased axial bearing to control the suspension control of the axial degree of freedom of the rotating shaft. Two sets of permanent magnet biased radial electromagnetic bearings and one set of permanent magnet biased axial bearings realize the five-degree-of-freedom suspension of the rotor space. The bias magnetic field is generated by the permanent magnet, and a closed loop is formed by the auxiliary stator poles, the rotating shaft, and the radial stator poles to form a permanent magnet bias magnetic field. A bias magnetic flux is formed in the main air gap between the radial stator poles and the rotating shaft. The radial horizontal and vertical control windings are fed with control current to generate a control magnetic field. The control magnetic field is formed inside the stator core and the rotating shaft to adjust the bias magnetic flux between the radial stator poles and the main air gap of the rotating shaft, and the radial two-degree-of-freedom suspension control is realized. Among them, the permanent magnet generates a bias magnetic field, and a closed loop is formed through the stator core and thrust plate at the left and right ends to form a bias magnetic field, forming a bias magnetic flux in the air gap between the left and right stator cores and thrust plates. The control winding is passed through a control current to form a control magnetic field, and a closed loop is formed through the stator core and thrust plate to form a control magnetic circuit. The bias magnetic flux in the stator core and thrust plate at the left and right ends is adjusted to achieve axial suspension control of the rotating shaft. Each set of radial magnetic bearings controls the two radial degrees of freedom of the rotor, and the axial magnetic bearings control the axial translational degree of freedom of the rotor. The magnetic suspension system structure has the following disadvantages:

[0005] When the radial magnetic bearing performs radial horizontal and vertical control simultaneously, the radial two-degree-of-freedom control magnetic fields are coupled with each other, the control logic is complex, and the radial two-degree-of-freedom control winding is single. When a single winding fails, the control of the corresponding radial degree of freedom will fail, the high-speed rotating shaft will cause serious safety hazards, and the stability and reliability of the suspension system are low. Summary of the invention

[0006] The main purpose of the present invention is to provide a radial hybrid magnetic suspension bearing assembly and a motor having the same, so as to solve the problem of large axial length of the rotor in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a radial hybrid magnetic suspension bearing assembly is provided, comprising: an outer stator core, a permanent magnet is arranged in the first end of the outer stator core; a first radial vertical stator assembly, the first radial vertical stator assembly is arranged in the second end of the outer stator core; a first radial horizontal stator assembly, the first radial horizontal stator assembly is arranged in the outer stator core and is located between the permanent magnet and the first radial vertical stator assembly; a magnetic isolation portion, the magnetic isolation portion is arranged between the first radial horizontal stator assembly and the outer stator core; a rotor assembly, the rotor assembly is arranged in the outer stator core, and the rotor assembly includes a rotating shaft; wherein the first radial vertical stator assembly and the first radial horizontal stator assembly are used to generate an independent control magnetic field, the permanent magnet, the first radial vertical stator assembly, and the first radial horizontal stator assembly generate a bias magnetic field, and the control magnetic field is used to control the bias magnetic field to control the rotating shaft to move along a preset direction.

[0008] Furthermore, the first radial vertical stator assembly includes: a first radial vertical stator, which is an annular structure, is arranged in the second end of the outer stator core and is located on one side of the permanent magnet, and a first stator tooth is arranged on the inner circle of the first radial vertical stator; and a radial vertical winding, which is wound on the first stator tooth.

[0009] Furthermore, there are two first stator teeth, each of which is provided with a radial vertical winding, and the two first stator teeth are arranged opposite to each other.

[0010] Furthermore, the first radial horizontal stator assembly includes: a first radial horizontal stator, which is an annular structure, is arranged in the outer stator core and is located between the permanent magnet and the first radial vertical stator, the first radial horizontal stator is coaxially arranged with the first radial vertical stator, and a third stator tooth is arranged on the inner circle of the first radial horizontal stator; and a first radial horizontal winding, which is wound on the third stator tooth.

[0011] Furthermore, there are two third stator teeth, each of which is provided with a first radial horizontal winding, and the two third stator teeth are arranged opposite to each other.

[0012] Furthermore, the magnetic isolation part includes: a magnetic isolation ring, which is arranged in the outer stator core and sleeved on the outer peripheral surface of the first radial horizontal stator.

[0013] Furthermore, a first annular protrusion and a second annular protrusion are provided on the inner circumferential surface from the first end of the outer stator core to the second end of the outer stator core, the inner diameter of the first annular protrusion is smaller than the inner diameter of the second annular protrusion, the permanent magnet is an annular structure, the outer circle of the permanent magnet is arranged to fit the inner circle of the first annular protrusion, the first radial horizontal stator is arranged in the annular cavity formed by the inner circumferential surface of the second annular protrusion, and the first radial horizontal stator is arranged at a distance from the inner step surface of the first annular protrusion, the first radial vertical stator is arranged in the outer stator core and is located on one side of the step surface of the second annular protrusion, and the first radial vertical stator is arranged at a distance from the step surface of the second annular protrusion.

[0014] Furthermore, the radial hybrid magnetic bearing assembly also includes: a first magnetic conductive ring, which is arranged in the outer stator core and located between the first annular protrusion and the first radial horizontal stator, and / or a second magnetic conductive ring, which is arranged in the outer stator core and located between the first radial vertical stator and the second annular protrusion.

[0015] Furthermore, there are multiple first stator teeth, and the radial vertical windings on each first stator tooth independently generate a control magnetic field. When one of the radial vertical windings fails, the access current of at least one remaining radial vertical winding can be increased to generate a magnetic field of a preset strength, and / or there are multiple third stator teeth, and the first radial horizontal windings on each third stator tooth independently generate a control magnetic field. When one of the first radial horizontal windings fails, the access current of at least one remaining first radial horizontal winding can be increased to generate a magnetic field of a preset strength.

[0016] Further, a geometric center line of the first stator tooth along the radial direction of the first radial vertical stator is arranged perpendicular to a geometric center line of the third stator tooth along the radial direction of the first radial horizontal stator.

[0017] According to another aspect of the present invention, a motor is provided, comprising a radial hybrid magnetic bearing assembly, wherein the radial hybrid magnetic bearing assembly is the radial hybrid magnetic bearing assembly described above.

[0018] By applying the technical solution of the present invention, a permanent magnet, a first radial vertical stator assembly, a first radial horizontal stator assembly, a magnetic isolation portion and a rotor assembly are arranged in an outer stator core, and the first radial vertical stator assembly and the first radial horizontal stator assembly are arranged in a manner for generating an independent control magnetic field. Such an arrangement can avoid coupling inside the radial hybrid magnetic bearing assembly, thereby effectively improving the stability and reliability of the radial hybrid magnetic bearing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of a first embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0021] Figure 2 A schematic diagram showing a radial vertical control magnetic field of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0022] Figure 3 A schematic structural diagram of a second embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0023] Figure 4 A schematic diagram showing a radial horizontal control magnetic field of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0024] Figure 5 A schematic structural diagram of a third embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0025] Figure 6 An exploded structural schematic diagram of an embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0026] Figure 7 A schematic structural diagram of an embodiment of a rotor assembly of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0027] Figure 8 A schematic cross-sectional view of an embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0028] Fig. 9 A schematic structural diagram of an embodiment of a rotating shaft of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0029] Fig.10A schematic diagram showing a force analysis of a rotating shaft of a radial hybrid magnetic bearing assembly according to the present invention in a first state is shown;

[0030] Fig.11 A schematic diagram showing a force analysis of a rotating shaft of a radial hybrid magnetic bearing assembly according to the present invention in a second state is shown;

[0031] Fig.12 A schematic diagram of force analysis of the rotating shaft of the radial hybrid magnetic bearing assembly according to the present invention in the third state is shown;

[0032] Fig.13 A schematic diagram of force analysis of a rotating shaft of a radial hybrid magnetic bearing assembly according to the present invention in a fourth state is shown;

[0033] Fig.14 A schematic structural diagram of a fourth embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0034] Fig.15 Shows Fig.14 Schematic diagram of the cross-sectional structure along the AA direction;

[0035] Fig.16 A schematic structural diagram of a fifth embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown;

[0036] Fig.17 A structural schematic diagram of a sixth embodiment of a radial hybrid magnetic bearing assembly according to the present invention is shown.

[0037] The above drawings include the following reference numerals:

[0038] 10. External stator core;

[0039] 11. permanent magnet; 12. annular boss; 13. first annular step; 14. second annular step; 15. first annular protrusion; 16. second annular protrusion;

[0040] 20. A first radial vertical stator assembly;

[0041] 21. a first radial vertical stator; 211. a first stator tooth;

[0042] 22. A first radial vertical winding; 23. A first magnetic isolation ring;

[0043] 30. A second radial vertical stator assembly;

[0044] 31. second radial vertical stator; 311. second stator tooth;

[0045] 32. A second radial vertical winding; 33. A second magnetic isolation ring;

[0046] 40. Rotor assembly;

[0047] 41. Rotating shaft; 42. Radial vertical rotor; 43. First radial horizontal rotor; 44. Second radial horizontal rotor;

[0048] 50. A first radial horizontal stator assembly;

[0049] 51. first radial horizontal stator; 511. third stator tooth; 52. first radial horizontal winding;

[0050] 60. A second radial horizontal stator assembly;

[0051] 61. second radial horizontal stator; 611. fourth stator tooth; 62. second radial horizontal winding;

[0052] 70. Precision nuts;

[0053] 80. A first magnetic conductive ring;

[0054] 90. Second magnetic conductive ring. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0059] Combination Figures 1 to 13 As shown, according to a specific embodiment of the present application, a radial hybrid magnetic bearing assembly is provided.

[0060] Specifically, the radial hybrid magnetic bearing assembly includes an outer stator core 10, a first radial vertical stator assembly 20, a first radial horizontal stator assembly 50 and a magnetic isolation portion. A permanent magnet 11 is arranged in the first end of the outer stator core 10. The first radial vertical stator assembly 20 is arranged in the second end of the outer stator core 10; the first radial horizontal stator assembly 50 is arranged in the outer stator core 10 and is located between the permanent magnet 11 and the first radial vertical stator assembly 20. The magnetic isolation portion is arranged between the first radial horizontal stator assembly 50 and the outer stator core 10; the rotor assembly 40 is arranged in the outer stator core 10, and the rotor assembly 40 includes a rotating shaft 41; wherein the first radial vertical stator assembly 20 is used to generate an independent radial vertical control magnetic field, the first radial horizontal stator assembly 50 is used to generate an independent radial horizontal control magnetic field, and the permanent magnet 11 generates a bias magnetic field. wherein the magnetic isolation portion can be a magnetic isolation ring 53.

[0061] In this embodiment, a permanent magnet, a first radial vertical stator assembly, a first radial horizontal stator assembly, a magnetic isolation portion and a rotor assembly are arranged in the outer stator core, and the first radial vertical stator assembly and the first radial horizontal stator assembly are arranged in a manner for generating an independent control magnetic field. Such an arrangement can avoid coupling inside the radial hybrid magnetic bearing assembly, thereby effectively improving the stability and reliability of the radial hybrid magnetic bearing assembly.

[0062] The invention comprises: an outer stator core 10, wherein a permanent magnet 11 is disposed in the outer stator core 10; a first radial vertical stator assembly 20, wherein the first radial vertical stator assembly 20 is disposed in the outer stator core 10 and is located on a first side of the permanent magnet 11; a second radial vertical stator assembly 30, wherein the second radial vertical stator assembly 30 is disposed in the outer stator core 10 and is located on a second side of the permanent magnet 11, wherein the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 are disposed opposite to each other; and a rotor assembly 40, wherein the rotor assembly 40 is disposed in the outer stator core 1 ... The component 40 includes a rotating shaft 41; wherein the first radial vertical stator component 20 and the second radial vertical stator component 30 are used to generate an independent control magnetic field, the permanent magnet 11, the first radial vertical stator component 20, and the second radial vertical stator component 30 generate a bias magnetic field, and the control magnetic field is used to control the bias magnetic field to control the rotating shaft 41 to translate along the Y axis, rotate around the Y axis, translate along the X axis, control the rotating shaft 41 to rotate around the X axis, and translate along the Z axis. The X axis and the Y axis are along the radial direction of the rotating shaft 41, and the Z axis is the axial direction of the rotating shaft 41.

[0063] In this embodiment, a permanent magnet 11 is arranged in the outer stator core 10, and a first radial vertical stator assembly 20 and a second radial vertical stator assembly 30 are arranged on both sides of the permanent magnet 11, and the control magnetic fields generated by the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 are independent. Such an arrangement enables the magnetic circuits generated by the first radial vertical stator assembly 20 and the second radial vertical stator assembly 30 to be complementary coupled, thereby simplifying the radial degree of freedom control logic and improving the stability and reliability of the radial control of the radial hybrid magnetic suspension bearing assembly. Such an arrangement enables the radial hybrid magnetic suspension bearing assembly to realize radial and axial degrees of freedom multi-winding control of the rotating shaft 41, effectively avoiding the magnetic suspension system being in an uncontrolled state when a single winding control failure occurs, and further improving the stability and reliability of the magnetic suspension system.

[0064] like Figure 1 and Figure 6 As shown, the first radial vertical stator assembly 20 includes a first radial vertical stator 21 and a first radial vertical winding 22. The first radial vertical stator 21 is an annular structure, and the first radial vertical stator 21 is arranged in the outer stator core 10 and is located on the first side of the permanent magnet 11. The first stator teeth 211 are arranged on the inner circle of the first radial vertical stator 21. The first radial vertical winding 22 is wound on the first stator teeth 211. There are two first stator teeth 211, and each first stator tooth 211 is provided with a first radial vertical winding 22, and the two first stator teeth 211 are arranged opposite to each other. Such an arrangement can effectively improve the performance of the first radial vertical stator assembly 20. Of course, the number of the first stator teeth 211 can also be set to other numbers as needed.

[0065] like Figure 1 As shown, the first radial vertical stator assembly 20 further includes a first magnetic isolation ring 23. The first magnetic isolation ring 23 is disposed in the outer stator core 10, and the first magnetic isolation ring 23 is sleeved on the outer circumferential surface of the first radial vertical stator 21. This arrangement can prevent magnetic leakage between the first radial vertical stator 21 and the outer stator core 10 from affecting the strength of the radial bias magnetic field C1.

[0066] Furthermore, the second radial vertical stator assembly 30 includes a second radial vertical stator 31 and a second radial vertical winding 32. The second radial vertical stator 31 is an annular structure, and the second radial vertical stator 31 is arranged in the outer stator core 10 and is located on the second side of the permanent magnet 11. The second radial vertical stator 31 is coaxially arranged with the first radial vertical stator 21, and a second stator tooth 311 is arranged on the inner circle of the second radial vertical stator 31. The second radial vertical winding 32 is wound on the second stator teeth 311. There are two second stator teeth 311, and each second stator tooth 311 is provided with a second radial vertical winding 32, and the two second stator teeth 311 are arranged opposite to each other. Such an arrangement can effectively improve the performance of the second radial vertical stator assembly 30. The number of the second stator teeth 311 is not limited to the arrangement of two.

[0067] In order to further increase the strength of the radial bias magnetic field C1 , the second radial vertical stator assembly 30 further includes a second magnetic isolation ring 33 . The second magnetic isolation ring 33 is disposed in the outer stator core 10 and sleeved on the outer circumference of the second radial vertical stator 31 .

[0068] like Figure 3 As shown, the radial hybrid magnetic bearing assembly also includes a first radial horizontal stator assembly 50 and a second radial horizontal stator assembly 60. The first radial horizontal stator assembly 50 is arranged in the first end of the outer stator core 10 and is located outside the first radial vertical stator assembly 20. The second radial horizontal stator assembly 60 is arranged in the second end of the outer stator core 10 and is located outside the second radial vertical stator assembly 30. Among them, the first radial horizontal stator assembly 50 and the second radial horizontal stator assembly 60 are used to generate an independent control magnetic field, and a bias magnetic field is generated by the permanent magnet 11, the first radial horizontal stator assembly 50, and the second radial horizontal stator assembly 60. The control magnetic field is used to control the bias magnetic field to control the movement of the rotating shaft 41 along the X-axis or the Z-axis. That is, in this embodiment, in combination with the outer stator core 10, the permanent magnet 11, the first radial vertical stator assembly 20, the second radial vertical stator assembly 30 and the rotor assembly 40, it is possible to achieve five-degree-of-freedom control of the rotating shaft 41, effectively improving the stability and reliability of the rotating shaft 41.

[0069] Specifically, the first radial horizontal stator assembly 50 includes a first radial horizontal stator 51 and a first radial horizontal winding 52. The first radial horizontal stator 51 is an annular structure, and the first radial horizontal stator 51 is arranged in the first end of the outer stator core 10 and is located outside the axial direction of the first radial vertical stator assembly 20. The third stator teeth 511 are arranged on the inner circle of the first radial horizontal stator 51. The first radial horizontal winding 52 is wound on the third stator teeth 511. There are two third stator teeth 511, and the two third stator teeth 511 are arranged opposite to each other. Of course, the number of the third stator teeth 511 can also be set to more than two.

[0070] Preferably, the geometric center line of the third stator tooth 511 along the first radial horizontal stator 51 is arranged perpendicular to the geometric center line of the first stator tooth 211 along the first radial vertical stator 21. This arrangement enables the first stator tooth 211 and the third stator tooth 511 to be arranged staggered in the axial direction of the rotating shaft 41. This arrangement can timely correct the suspension state of the rotating shaft 41 by adjusting the magnetic flux intensity of the magnetic circuit formed on the first stator tooth 211 and the third stator tooth 511, further improving the stability of the rotating shaft 41 during rotation.

[0071] The second radial horizontal stator assembly 60 includes a second radial horizontal stator 61 and a second radial horizontal winding 62. The second radial horizontal stator 61 is an annular structure, and the second radial horizontal stator 61 is arranged in the second end of the outer stator core 10 and is located on the outside of the axial direction of the second radial vertical stator assembly 30. A fourth stator tooth 611 is arranged on the inner circle of the second radial horizontal stator 61. The second radial horizontal winding 62 is wound on the fourth stator tooth 611. There are two fourth stator teeth 611, and the two fourth stator teeth 611 are arranged opposite to each other. In this embodiment, the fourth stator teeth 611 can also be arranged in other numbers.

[0072] Preferably, the geometric center line of the fourth stator tooth 611 along the second radial horizontal stator 61 is arranged perpendicular to the geometric center line of the second stator tooth 311 along the second radial vertical stator 31. This arrangement enables the second stator tooth 311 and the fourth stator tooth 611 to be arranged staggered in the axial direction of the rotating shaft 41, and this arrangement can timely correct the suspension state of the rotating shaft 41 by adjusting the magnetic flux intensity of the magnetic circuit formed on the second stator tooth 311 and the fourth stator tooth 611, further improving the stability of the rotating shaft 41 during rotation.

[0073] like Figure 7As shown, the rotor assembly 40 includes a radial vertical rotor 42. The inner circle of the first radial vertical stator 21, the outer stator core 10 and the second radial vertical stator 31 is formed for installing the radial vertical rotor 42. The radial vertical rotor 42 is arranged in cooperation with the first radial vertical stator 21, the outer stator core 10 and the second radial vertical stator 31, and the rotating shaft 41 is passed through the radial vertical rotor 42. Such an arrangement can improve the stability and reliability of the radial hybrid magnetic suspension bearing assembly.

[0074] Furthermore, the rotor assembly 40 also includes a first radial horizontal rotor 43 and a second radial horizontal rotor 44. The first radial horizontal rotor 43 is disposed in the first end of the outer stator core 10 and is located outside the axial direction of the first radial horizontal stator 51. The first radial horizontal rotor 43 is arranged in cooperation with the first radial horizontal stator 51. The second radial horizontal rotor 44 is disposed in the second end of the outer stator core 10 and is located outside the axial direction of the second radial horizontal stator 61. The second radial horizontal rotor 44 is arranged in cooperation with the second radial horizontal stator 61, and the rotating shaft 41 is penetrated in the first radial horizontal rotor 43 and the second radial horizontal rotor 44. Among them, the end of the rotating shaft 41 is locked by a precision nut.

[0075] The diameter of the cross section of at least one of the first radial horizontal rotor 43 and the second radial horizontal rotor 44 is gradually increased outward along the direction of the rotation shaft 41. Figure 7 As shown, the first radial horizontal rotor 43 and the second radial horizontal rotor 44 are both frustum structures, so that an air gap structure with an inclination angle to the axial direction of the rotating shaft is formed between the first radial horizontal rotor 43, the second radial horizontal rotor 44 and the first radial horizontal stator 51, the second radial horizontal stator 61. Such a configuration can control the axial direction of the rotating shaft 41 by controlling the magnitude of the current passed through the first radial horizontal winding 52 and the second radial horizontal winding 62, thereby effectively improving the practicality of the magnetic levitation bearing.

[0076] like Figure 5 As shown, in another embodiment of the present application, the first radial horizontal rotor 43 and the second radial horizontal rotor 44 are equal-diameter structures, and an air gap structure with equal distance along the axial direction is formed between the first radial horizontal rotor 43 and the second radial horizontal rotor 44 and the first radial horizontal stator 51 and the second radial horizontal stator 61.

[0077] Preferably, the first radial horizontal stator 51, the second radial horizontal stator 61 and the outer stator core 10 are integrally formed. Such an arrangement can further improve the stability of the radial hybrid magnetic bearing assembly.

[0078] Furthermore, an annular boss 12 is provided in the middle of the outer stator core 10. The outer peripheral surface of the permanent magnet 11 is attached to the inner circle of the annular boss 12, and the side of the permanent magnet 11 facing the outer surface of the outer stator core 10 is the N pole, and the side of the permanent magnet 11 facing the rotating shaft 41 is the S pole. This arrangement enables the permanent magnet 11 to cooperate with the first radial horizontal winding 52 and the second radial horizontal winding 62 to form a radial horizontal bias magnetic field C5 for controlling the rotating shaft 41.

[0079] The height of the annular boss 12 in the axial direction is the same as the height of the permanent magnet 11 in the axial direction. This arrangement can improve the installation stability of the permanent magnet 11.

[0080] like Figure 6 and Figure 8 As shown, a first annular step 13 is provided in the first end of the outer stator core 10. An installation space for accommodating the first radial horizontal stator assembly 50 is formed between the step surface of the first annular step 13 and the end of the outer stator core 10. An installation space for accommodating the first radial vertical stator assembly 20 is formed from the step surface of the first annular step 13 to one side of the annular boss 12. A second annular step 14 is provided in the second end of the outer stator core 10. An installation space for accommodating the second radial horizontal stator assembly 60 is formed between the step surface of the second annular step 14 and the end of the outer stator core 10. An installation space for accommodating the second radial vertical stator assembly 30 is formed from the step surface of the second annular step 14 to one side of the annular boss 12. Such an arrangement can make the structure of the radial hybrid magnetic bearing assembly more compact and can effectively shorten the axial height of the radial hybrid magnetic bearing assembly.

[0081] Further, the first radial vertical stator 21 has a plurality of first stator teeth 211. Each first stator tooth 211 is provided with a first radial vertical winding 22, and each first radial vertical winding 22 is independently controlled so that each first radial vertical winding 22 generates an independent control magnetic field. The second radial vertical stator 31 has a plurality of second stator teeth 311, and each second stator tooth 311 is provided with a second radial vertical winding 32, and each second radial vertical winding 32 is independently controlled so that each second radial vertical winding 32 generates an independent control magnetic field. The first radial horizontal stator 51 has a plurality of third stator teeth 511, and each third stator tooth 511 is provided with a first radial horizontal winding 52, and each first radial horizontal winding 52 is independently controlled so that each first radial horizontal winding 52 generates an independent control magnetic field. The second radial horizontal stator 61 has a plurality of fourth stator teeth 611, each of which is provided with a second radial horizontal winding 62, and each second radial horizontal winding 62 is independently controlled so that each second radial horizontal winding 62 generates an independent control magnetic field. The windings on each stator tooth are independently controlled, so that when the winding on one of the stator teeth fails, a control magnetic field of sufficient strength can be generated by increasing the access current of another stator tooth, or by increasing the access current of the remaining stator teeth at the same time, which also plays a role in stabilizing the control shaft. Among them, the geometric center line of the first stator tooth 211 along the radial direction of the first radial vertical stator 21 is arranged perpendicular to the geometric center line of the third stator tooth 511 along the radial direction of the first radial horizontal stator 51.

[0082] The radial hybrid magnetic bearing assembly in the above embodiment can also be used in the technical field of motor equipment. That is, according to another aspect of the present invention, a motor is provided, including a radial hybrid magnetic bearing assembly, and the radial hybrid magnetic bearing assembly is the radial hybrid magnetic bearing assembly in the above embodiment.

[0083] Specifically, in order to solve the problems in the prior art of five-degree-of-freedom suspension system, in which two radial bearings and an axial bearing are arranged in parallel, resulting in an increase in the axial space of the five-degree-of-freedom suspension system, an elongation of the axial length of the rotor, an increase in flexibility, abnormal mutual coupling between the radial horizontal and radial vertical control magnetic fields of the radial permanent magnetic bias bearing, a simplified control logic of the magnetic suspension system, and poor stability and reliability of the magnetic suspension bearing control system, the present application proposes a new magnetic circuit decoupled five-degree-of-freedom radial hybrid magnetic suspension bearing assembly,

[0084] like Fig. 9 As shown, the rotating shaft realizes five-degree-of-freedom suspension, that is, the rotating shaft realizes five-degree-of-freedom directional control of rotation around the Y axis, translation along the Y axis (radial vertical direction), rotation around the X axis, translation along the X axis (radial horizontal direction), and translation along the Z axis (axial direction).

[0085] like Figure 1, Figure 3 As shown, the permanent magnet 11, the outer stator core 10, the first radial vertical stator 21, the second radial vertical stator 31, the first radial vertical winding 22, the second radial vertical winding 32, and the radial vertical rotor 42 form a radial vertical direction two-degree-of-freedom control system, which enables the shaft 41 to move in the Y-axis direction and rotate around the X-axis. The permanent magnet 11, the outer stator core 10, the first radial horizontal stator 51, the second radial horizontal stator 61, the first radial horizontal winding 52, the second radial horizontal winding 62, the first radial horizontal rotor 43, the second radial horizontal rotor 44, and the radial vertical rotor 42 form an axial-radial horizontal direction three-degree-of-freedom control system, which enables the shaft 41 to move in the X-axis and Z-axis directions and rotate around the Y-axis. The dual radial-axial integrated structure of the five-degree-of-freedom magnetic levitation bearing reduces the axial space occupied by the magnetic levitation system and shortens the length of the rotating shaft. The radial vertical and horizontal control magnetic fields are independent and uncoupled from each other, realizing independent radial and horizontal regulation of the rotating shaft, thereby simplifying the control logic of the magnetic levitation system and improving the stability and reliability of the system.

[0086] The rotating shaft realizes radial and vertical two-degree-of-freedom suspension control, that is, translation along the Y axis and rotation around the X axis. The working principle is as follows Figure 1As shown, the permanent magnet 11 (with N pole on the outside and S pole on the inside) generates a radial vertical bias magnetic field C1 passing through the first radial vertical stator 21 and the second radial vertical stator 31 at the left and right ends of the permanent magnet 11, and forms a closed loop with the radial vertical rotor 42, forming a bias magnetic flux between the main air gaps of the first radial vertical stator 21, the second radial vertical stator 31 and the radial vertical rotor 42. When the rotating shaft is in a balanced position, the bias magnetic flux between the upper and lower main air gaps in the vertical direction is the same, and the rotating shaft will be in a balanced state. Among them, when the rotating shaft 41 is impacted and deflected downward along the Y axis (vertical direction), the upper gap in the vertical direction increases and the lower gap decreases, resulting in a decrease in the bias magnetic flux in the upper main air gap and an increase in the bias magnetic flux in the lower main air gap. Because when the area of ​​the magnetic pole is constant, the magnetic field suction force is proportional to the square of the magnetic flux, and the downward suction force is greater than the upward suction force. Without external control, the rotating shaft continues to deflect downward and cannot return to the equilibrium position. The same control current is passed through the first radial vertical winding 22 and the second radial vertical winding 32 to generate a control magnetic field, which passes through the first radial vertical stator 21, the second radial vertical stator 31, and the radial vertical rotor 42 to form a closed loop, forming a radial vertical control magnetic field C2, increasing the bias flux in the upper main air gap, and reducing the bias flux in the lower main air gap, so that the upward suction force is greater than the downward suction force, and the rotating shaft 41 is offset upward to restore the equilibrium position. The radial vertical control winding stops being energized to achieve translational control of the rotating shaft 41 along the Y-axis direction. When the rotating shaft is subjected to impact and rotates clockwise around the X-axis, the main air gap flux between the first radial vertical stator 21 and the radial vertical rotor 42 changes, the upper air gap flux increases, and the lower air gap flux decreases, and the rotating shaft 41 is subjected to an upward suction force, and the main air gap between the second radial vertical stator 31 and the radial vertical rotor 42 changes, the upper air gap flux decreases, and the lower air gap flux increases, and the rotating shaft is subjected to a downward suction force. The suction forces at the left and right ends will form a clockwise torque, and the rotating shaft 41 continues to rotate clockwise and cannot restore balance. The first radial vertical winding 22 and the second radial vertical winding 32 are connected with control currents in opposite directions, so that the upper magnetic flux at the left end of the rotating shaft 41 decreases and the lower magnetic flux increases, and the left end of the rotating shaft 41 is subjected to a downward suction force, and the upper magnetic flux at the right end of the rotating shaft 41 increases and the lower magnetic flux decreases, and the right end of the rotating shaft 41 is subjected to an upward suction force. The rotating shaft 41 is subjected to a counterclockwise torque and gradually returns to a balanced position. The radial vertical control winding stops being energized to realize the rotation control of the rotating shaft around the X-axis.

[0087] The rotating shaft realizes the axial-radial horizontal freedom, that is, it moves along the X-axis (radial horizontal) and rotates around the Y-axis. The working principle of the axial direction movement control is similar to the prior art. Figure 1 , Figure 3As shown, the permanent magnet 11 generates a bias magnetic field, and a closed loop is formed through the outer stator core 10, the first radial horizontal stators 51 at the left and right ends, the second radial horizontal stators 61, the first radial horizontal rotor 43, the second radial horizontal rotor 44, and the radial vertical rotor 42 to form an axial-radial horizontal bias magnetic field C3, as Fig.10 As shown, the suction forces of the first radial horizontal stator 51 and the second radial horizontal stator 61 on the first radial horizontal rotor 43 and the second radial horizontal rotor 44 are F1, F2, F3, and F4 respectively. When the rotating shaft 41 is in the equilibrium position, F1, F2, F3, and F4 are equal in magnitude and different in direction, and the total force on the rotating shaft 41 is zero, maintaining the equilibrium state. Among them, when the rotating shaft 41 moves downward in the radial horizontal (X-axis) direction, the gaps on the lower sides at the left and right ends decrease, the magnetic flux increases, the gaps at the upper ends increase, and the magnetic flux decreases, causing downward suction forces to be generated at both ends of the rotating shaft 41 (F1 = F3 < F2 = F4), and the rotating shaft will continue to move downward and cannot return to the equilibrium position. The first radial horizontal winding 52 and the second radial horizontal winding 62 are passed through the same control current to generate a control magnetic circuit, which respectively pass through the first radial horizontal stator 51, the second radial horizontal stator 61, the first radial horizontal rotor 43, and the second radial horizontal rotor 44 to form a closed loop, forming an axial-radial horizontal control magnetic field C4, adjusting the control magnetic fluxes at the left and right ends, so that upward suction forces (F1 = F3 > F2 = F4) act on both the left and right ends of the rotating shaft, as Fig.11 As shown, the rotating shaft 41 will continue to move upward until it returns to the equilibrium position, and the control winding stops being energized, realizing the translational control of the rotating shaft 41 along the X-axis direction. When the rotating shaft 41 is subjected to an impact and rotates counterclockwise around the Y-axis, the left end rotates downward, the gap at the upper end increases, the magnetic flux decreases, the gap at the lower end decreases, the magnetic flux increases, the suction force at the lower end is greater than that at the upper end, a downward suction force is borne at the left end of the rotating shaft 41, and similarly, the situation at the right end is opposite, and an upward suction force acts on the right end of the rotating shaft 41 (F1 = F4 < F2 = F3), and the rotating shaft 41 continuously bears a counterclockwise torque and cannot return to the equilibrium position. Through the action of controlling the first radial horizontal winding 52 and the second radial horizontal winding 62 at the left and right ends, control currents of equal magnitude and opposite directions are passed through both ends, so that an upward suction force acts on the left end of the rotating shaft and a downward suction force acts on the right end (F1 = F4 > F2 = F3). As Fig.12 As shown, the rotating shaft 41 bears a moment acting in the clockwise rotation direction until it returns to the equilibrium position, realizing the rotational control of the rotating shaft 41 around the Y-axis. When the rotating shaft 41 undergoes an axial leftward displacement, the gap between the left end stator and the rotor increases, the magnetic flux decreases, that is, F1 and F2 decrease, and similarly, F3 and F4 increase at the right end, and the rotating shaft 41 continuously bears a leftward load and cannot return to the equilibrium position. The first radial horizontal winding 52 is intermittently passed through currents of equal magnitude and opposite directions to respectively achieve as Fig.13The suction forces F1 and f1 shown are equal in magnitude but different in direction, the suction forces F2 and f2 are equal in magnitude but different in direction, F1 and F2 are the suction forces generated by the stator on the rotor when a positive current is passed through the control winding, and f1 and f2 are the suction forces generated by the stator on the rotor when a negative current is passed through the control winding, so that the rotating shaft 41 is intermittently subjected to a rightward displacement load until it returns to a balanced position, and the control winding stops being energized to achieve displacement control of the rotating shaft 41 in the axial direction.

[0088] The radial hybrid magnetic suspension bearing assembly adopting this structure solves the problem that the existing technology adopts the double radial bearing-axial bearing arranged in parallel, resulting in a large axial span of the magnetic suspension system, a long shaft length, large flexibility, many control components, and high material cost of the magnetic suspension system. The bearing structure in the existing technology is adopted. The radial horizontal and vertical degrees of freedom control magnetic circuit coupling makes the control logic complicated, and the radial and axial degrees of freedom control windings have a single function, and the control system reliability is low.

[0089] The radial hybrid magnetic suspension bearing assembly of the present application is adopted, and the dual radial bearing-axial bearing integrated structure, the axial-radial horizontal stator magnetic pole has a conical angle, and the output can control the axial degree of freedom and radial horizontal degree of freedom of the rotating shaft. This arrangement makes the axial space of the radial hybrid magnetic suspension bearing assembly small, the rotating shaft length is short, the flexibility is small, the entire suspension system shares a permanent magnet 11, and the axial-radial horizontal degree of freedom shares a set of control components, which reduces the number of components and the material cost of the magnetic suspension system is low. The dual radial adopts an integrated structure, and the dual radial magnetic poles realize four-degree-of-freedom suspension of the rotating shaft. The magnetic pole edge effect is used to axially control the rotating shaft 41 to realize five-degree-of-freedom suspension of the rotating shaft 41, reduce the number of components, and save the material cost and space occupied by the axial bearing. The radial horizontal and vertical degree of freedom control systems are independently arranged, so that the radial horizontal and vertical degree of freedom control magnetic circuits are independent of each other and are not coupled to each other, simplifying the radial degree of freedom control logic and improving the stability and reliability of the radial control of the magnetic suspension bearing. Multi-winding control of radial and axial degrees of freedom prevents the magnetic levitation system from being in an uncontrolled state when a single winding control failure occurs, thereby improving the stability and reliability of the magnetic levitation system.

[0090] Furthermore, the dual radial-axial magnetic suspension bearing has an integrated structure, and the axial-radial horizontal stator has a conical magnetic pole, which can generate a force to control the axial movement and radial horizontal movement of the shaft, so that the radial horizontal degree of freedom and the axial degree of freedom share a set of control elements, reducing the space occupied by the magnetic suspension axial direction, shortening the shaft length, reducing flexibility, reducing the number of components, and saving material costs. Figure 5 As shown, the dual radial magnetic poles realize four-degree-of-freedom suspension of the rotating shaft 41, and utilize the magnetic pole edge effect to realize axial control of the rotating shaft 41, realize five-degree-of-freedom suspension of the rotating shaft, reduce the number of components, and save the cost of axial bearing materials and occupied space.

[0091] like Fig.14 As shown, in an embodiment of the present application, a bearing assembly structure with axially arranged control poles of radial four degrees of freedom is also provided. The control magnetic fields of the magnetic levitation assembly using this embodiment are uncoupled and independent of each other, which simplifies the radial degree of freedom control logic and improves the stability of radial control of the magnetic levitation bearing.

[0092] Specifically, Figures 14 to 17 As shown, in another embodiment of the present application, the radial hybrid magnetic bearing assembly includes an outer stator core 10, a first radial vertical stator assembly 20, a first radial horizontal stator assembly 50, and a rotor assembly 40. A permanent magnet 11 is arranged in the first end of the outer stator core 10. The first radial vertical stator assembly 20 is arranged in the second end of the outer stator core 10. The first radial horizontal stator assembly 50 is arranged in the outer stator core 10 and is located between the permanent magnet 11 and the first radial vertical stator assembly 20. The rotor assembly 40 is arranged in the outer stator core 10, and the rotor assembly 40 includes a rotating shaft 41. Among them, the first radial vertical stator assembly 20 and the first radial horizontal stator assembly 50 are used to generate independent control magnetic fields, and the control magnetic fields generated by the permanent magnet 11, the first radial vertical stator assembly 20, and the first radial horizontal stator assembly 50 control the rotating shaft 41 to move along a preset direction.

[0093] In this embodiment, a permanent magnet 11, a first radial vertical stator assembly 20, a first radial horizontal stator assembly 50 and a rotor assembly 40 are arranged in the outer stator core 10, and the first radial vertical stator assembly 20 and the first radial horizontal stator assembly 50 are arranged in a manner for generating an independent control magnetic field. Such an arrangement can avoid coupling inside the radial hybrid magnetic bearing assembly, and the radial hybrid magnetic bearing assembly adopting this structure is compact inside, reducing the axial height of the radial hybrid magnetic bearing assembly, and effectively improving the stability and reliability of the radial hybrid magnetic bearing assembly.

[0094] Specifically, the first radial vertical stator assembly 20 includes a first radial vertical stator 21 and a first radial vertical winding 22. The first radial vertical stator 21 is an annular structure, and the first radial vertical stator 21 is arranged in the second end of the outer stator core 10 and is located on one side of the permanent magnet 11. The first stator teeth 211 are arranged on the inner circle of the first radial vertical stator 21. The first radial vertical winding 22 is wound on the first stator teeth 211. In this embodiment, there are two first stator teeth 211, and each first stator tooth 211 is provided with a first radial vertical winding 22, and the two first stator teeth 211 are arranged opposite to each other. The first radial horizontal stator assembly 50 includes a first radial horizontal stator 51 and a first radial horizontal winding 52. The first radial horizontal stator 51 is an annular structure. The first radial horizontal stator 51 is arranged in the outer stator core 10 and between the permanent magnet 11 and the first radial vertical stator 21. The first radial horizontal stator 51 is coaxially arranged with the first radial vertical stator 21. The inner circle of the first radial horizontal stator 51 is provided with a third stator tooth 511. The first radial horizontal winding 52 is wound on the third stator tooth 511. There are preferably two third stator teeth 511, each of which is provided with a first radial horizontal winding 52, and the two third stator teeth 511 are arranged opposite to each other.

[0095] In order to further improve the reliability of magnetic levitation components, such as Fig.14 As shown, the radial hybrid magnetic bearing assembly also includes a magnetic isolation ring 53. The magnetic isolation ring 53 is arranged in the outer stator core 10, and the magnetic isolation ring 53 is sleeved on the outer circumference of the first radial horizontal stator 51. In this embodiment, a first annular protrusion 15 and a second annular protrusion 16 are arranged on the inner circumference from the first end of the outer stator core 10 to the second end of the outer stator core 10. The inner diameter of the first annular protrusion 15 is smaller than the inner diameter of the second annular protrusion 16, the permanent magnet 11 is an annular structure, the outer circle of the permanent magnet 11 is arranged to fit the inner circle of the first annular protrusion 15, the first radial horizontal stator 51 is arranged in the annular cavity formed by the inner circumference of the second annular protrusion 16, and the first radial horizontal stator 51 is arranged at a distance from the inner step surface of the first annular protrusion 15, the first radial vertical stator 21 is arranged in the outer stator core 10 and is located on one side of the step surface of the second annular protrusion 16, and the first radial vertical stator 21 is arranged at a distance from the step surface of the second annular protrusion 16. Such an arrangement can further improve the stability of the magnetic suspension assembly.

[0096] The radial hybrid magnetic bearing assembly also includes a first magnetic ring 80 and a second magnetic ring 90. The first magnetic ring 80 is arranged in the outer stator core 10 and is located between the first annular protrusion 15 and the first radial horizontal stator 51. The second magnetic ring 90 is arranged in the outer stator core 10 and is located between the first radial vertical stator 21 and the second annular protrusion 16.

[0097] Among them, there are multiple first stator teeth 211, and the first radial vertical winding 22 on each first stator tooth 211 independently generates a control magnetic field. When one of the first radial vertical windings 22 fails, the access current of at least one other first radial vertical winding 22 can be increased to generate a magnetic field of a preset strength. There are multiple third stator teeth 511, and the first radial horizontal winding 52 on each third stator tooth 511 independently generates a control magnetic field. When one of the first radial horizontal windings 52 fails, the access current of at least one other first radial horizontal winding 52 can be increased to generate a magnetic field of a preset strength.

[0098] like Figure 1 , Fig. 9 As shown, radial and axial degrees of freedom are controlled by multiple windings, and the control windings on the stator poles are independent of each other. When a winding on a stator fails, the other control winding on the same stator only needs to increase the control current to generate the same control magnetic field, exercise the corresponding control function, and improve the reliability of radial control of the magnetic suspension bearing.

[0099] Specifically, the magnetic circuit decouples the five-degree-of-freedom magnetic bearing. Figure 8As shown, the dual radial-axial integrated system controls the five degrees of freedom of the rotating shaft, and the components for realizing the five-degree-of-freedom control of the rotating shaft are composed of a rotating shaft 41, a radial vertical rotor 42, a first radial horizontal rotor 43, a second radial horizontal rotor 44, a precision nut 70, a first radial horizontal winding 52, a second radial horizontal winding 62, a first radial horizontal stator 51, a second radial horizontal stator 61, a first radial vertical winding 22, a second radial vertical winding 32, a first radial vertical stator 21, a second radial vertical stator 31, a first magnetic isolation ring 23, a second magnetic isolation ring 33, an outer stator core 10, and a permanent magnet 11. The permanent magnet 11 is embedded in the outer stator core 10 by means of gluing or shrink fitting. The inner side of the outer stator core 10 has a boss (the boss can be an annular structure, i.e., an annular boss 12, or a semicircular structure) for axial positioning of the permanent magnet. The magnetic isolation ring is installed on the inner walls on both sides of the outer stator core 10 by means of gluing. The inner wall of the outer stator core 10 has an annular groove for axial and radial positioning of the magnetic isolation ring. The first radial vertical winding 22 and the second radial vertical winding 32 are fixed to the first radial vertical stator 21 and the second radial vertical stator 31 by means of gluing and binding to form a radial vertical stator assembly. The radial vertical stator assembly is embedded on both sides of the outer stator core 10 by means of shrink fitting and screw fastening. Preferably, there are four bosses on both sides of the outer stator core 10 to axially position the radial vertical stator assembly, the first radial horizontal winding 52 and the second radial horizontal winding 62 are respectively wound on the first radial horizontal stator 51 and the second radial horizontal stator 61, and the windings are fixed to the outer stator core 10 by gluing and binding processes to form an axial-radial horizontal stator assembly, the axial-radial horizontal stator assembly is installed on both sides of the outer stator core 10 by shrink fitting and screw fixing, and there are bosses on both sides of the outer stator core 10 to axially fix the axial-radial horizontal stator assembly, and the fixed installation of the five-degree-of-freedom magnetic suspension bearing stator assembly is completed by the above assembly process. The radial vertical rotor 42 is installed on the rotating shaft 41 from the left end by shrink fitting, and the convex step at the right end of the rotating shaft 41 axially positions the radial vertical rotor 42, the first radial horizontal rotor is shrink fitted on the left end of the rotating shaft, and the right side surface is tightly fitted with the left side surface of the radial vertical rotor 42, and the axial fixed installation is achieved by precision nuts. The shaft is installed from the left end of the magnetic bearing stator assembly. After the shaft is installed, the second radial horizontal rotor is shrink-fitted onto the shaft from the right end, tightly fitting with the radial vertical rotor 42 to achieve axial positioning. The second radial horizontal rotor is locked and fixed by precision nuts to complete the installation of the entire five-degree-of-freedom magnetic bearing.

[0100] The radial vertical two-degree-of-freedom suspension system is composed of an outer stator core 10, a permanent magnet, a first radial vertical winding 22, a second radial vertical winding 32, a first radial vertical stator 21, a second radial vertical stator 31, and a radial vertical rotor 42, which realizes the translation of the rotating shaft 41 along the Y axis and the rotation control around the X axis. The working principle is as follows: Figure 3 As shown, the permanent magnet generates a bias magnetic field, and a bias magnetic flux is generated between the radial vertical stator and the rotor at both ends. The radial vertical control windings at both ends generate independent control magnetic fields, and independently control the displacement mode of the two ends of the rotating shaft, simplifying the control logic, and improving the stability of the suspension system. The control windings at both ends are multi-winding control. When one winding fails, the other winding can increase the control current to generate the same control magnetic field, realize the demand regulation of the rotating shaft, improve the reliability of the suspension system, and realize the translation of the rotating shaft 41 along the Y-axis direction and the rotation control around the X-axis.

[0101] An axial-radial three-degree-of-freedom magnetic suspension system is composed of an outer stator core 10, a permanent magnet 11 (the permanent magnet is a ring structure), a first radial horizontal winding 52, a second radial horizontal winding 62, a first radial horizontal stator 51, a second radial horizontal stator 61, a first radial horizontal rotor 43, a second radial horizontal rotor 44, and a radial vertical rotor 42 to realize the translational motion of the rotating shaft 41 along the X-axis and the Z-axis and the rotation control around the Y-axis. The control principle is as follows: Figure 3 As shown, the permanent magnet generates a bias magnetic field, generating a bias magnetic flux between the axial-radial horizontal stator and the axial-radial horizontal rotor at both ends, and the control windings at both ends generate independent control magnetic fields to independently control the load size at both ends of the shaft, respectively. Figures 10 to 13 By adopting the load mode in the embodiment, the rotation axis 41 can be controlled to move in translation along the X-axis direction, in translation along the Z-axis direction, and around the Y-axis.

[0102] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0103] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0104] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A radial hybrid magnetic bearing assembly, characterized in that: include: An outer stator core (10), wherein a permanent magnet (11) is disposed in a first end of the outer stator core (10); A first radial vertical stator assembly (20), wherein the first radial vertical stator assembly (20) is disposed within the second end of the outer stator core (10); a first radial horizontal stator assembly (50), the first radial horizontal stator assembly (50) being arranged in the outer stator core (10) and between the permanent magnet (11) and the first radial vertical stator assembly (20); A magnetic isolation portion, the magnetic isolation portion being arranged between the first radial horizontal stator assembly (50) and the outer stator core (10); A rotor assembly (40), the rotor assembly (40) being arranged in the outer stator core (10), the rotor assembly (40) comprising a rotating shaft (41); The first radial vertical stator assembly (20) is used to generate an independent radial vertical control magnetic field, the first radial horizontal stator assembly (50) is used to generate an independent radial horizontal control magnetic field, and the permanent magnet (11) generates a bias magnetic field.

2. The radial hybrid magnetic bearing assembly according to claim 1, characterized in that: The first radial vertical stator assembly (20) comprises: a first radial vertical stator (21), the first radial vertical stator (21) being an annular structure, the first radial vertical stator (21) being arranged inside the second end of the outer stator core (10) and located on one side of the permanent magnet (11), and a first stator tooth (211) being arranged on the inner circle of the first radial vertical stator (21); A radial vertical winding (22), wherein the radial vertical winding (22) is wound on the first stator tooth (211).

3. The radial hybrid magnetic bearing assembly according to claim 2, characterized in that: There are two first stator teeth (211), each of which is provided with the radial vertical winding (22), and the two first stator teeth (211) are arranged opposite to each other.

4. The radial hybrid magnetic bearing assembly according to claim 2, characterized in that: The first radial horizontal stator assembly (50) comprises: a first radial horizontal stator (51), the first radial horizontal stator (51) being an annular structure, the first radial horizontal stator (51) being arranged in the outer stator core (10) and between the permanent magnet (11) and the first radial vertical stator (21), the first radial horizontal stator (51) being arranged coaxially with the first radial vertical stator (21), and a third stator tooth (511) being arranged on the inner circle of the first radial horizontal stator (51); A first radial horizontal winding (52), wherein the first radial horizontal winding (52) is wound on the third stator tooth (511).

5. The radial hybrid magnetic bearing assembly according to claim 4, characterized in that: There are two third stator teeth (511), each of which is provided with the first radial horizontal winding (52), and the two third stator teeth (511) are arranged opposite to each other.

6. The radial hybrid magnetic bearing assembly according to claim 4, characterized in that: The magnetic isolation part comprises: A magnetic isolation ring (53), wherein the magnetic isolation ring (53) is arranged in the outer stator core (10), and the magnetic isolation ring (53) is sleeved on the outer peripheral surface of the first radial horizontal stator (51).

7. The radial hybrid magnetic bearing assembly according to claim 4, characterized in that: A first annular protrusion (15) and a second annular protrusion (16) are provided on the inner circumference of the first end of the outer stator core (10) to the second end of the outer stator core (10); the inner diameter of the first annular protrusion (15) is smaller than the inner diameter of the second annular protrusion (16); the permanent magnet (11) is an annular structure; the outer circle of the permanent magnet (11) is arranged to fit the inner circle of the first annular protrusion (15); the first radial horizontal stator (51) is arranged in an annular cavity formed by the inner circumference of the second annular protrusion (16); and the first radial horizontal stator (51) is arranged at a distance from the inner step surface of the first annular protrusion (15); the first radial vertical stator (21) is arranged in the outer stator core (10) and is located on one side of the step surface of the second annular protrusion (16); and the first radial vertical stator (21) is arranged at a distance from the step surface of the second annular protrusion (16).

8. The radial hybrid magnetic bearing assembly according to claim 7, characterized in that: The radial hybrid magnetic bearing assembly also includes: a first magnetic conductive ring (80), the first magnetic conductive ring (80) being arranged in the outer stator core (10) and between the first annular protrusion (15) and the first radial horizontal stator (51), and / or A second magnetic conductive ring (90), the second magnetic conductive ring (90) is arranged in the outer stator core (10) and is located between the first radial vertical stator (21) and the second annular protrusion (16).

9. The radial hybrid magnetic bearing assembly according to claim 4, characterized in that: There are a plurality of first stator teeth (211), and the radial vertical windings (22) on each of the first stator teeth (211) independently generate a control magnetic field; when one of the radial vertical windings (22) fails, the input current of at least one of the remaining radial vertical windings (22) can be increased to generate a magnetic field of a preset strength, and / or There are a plurality of third stator teeth (511), and the first radial horizontal winding (52) on each of the third stator teeth (511) independently generates a control magnetic field. When one of the first radial horizontal windings (52) fails, the access current of at least one of the remaining first radial horizontal windings (52) can be increased to generate a magnetic field of a preset strength.

10. The radial hybrid magnetic bearing assembly according to claim 4, characterized in that: A geometric center line of the first stator tooth (211) along the radial direction of the first radial vertical stator (21) is arranged perpendicular to a geometric center line of the third stator tooth (511) along the radial direction of the first radial horizontal stator (51).

11. A motor comprising a radial hybrid magnetic bearing assembly, characterized in that: The radial hybrid magnetic bearing assembly is the radial hybrid magnetic bearing assembly according to any one of claims 1 to 10.

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