CN213776091U - Magnetic suspension bearing assembly and motor with same - Google Patents

Abstract

The utility model provides a magnetic suspension bearing assembly and have its motor. The first E-shaped stator assembly of the annular structure is defined by the first E-shaped stator assemblies and comprises a first E-shaped stator body and a plurality of first windings, a plurality of first stator teeth are arranged on the inner circle of the first E-shaped stator body, the first windings are multiple, the first windings are arranged on the first stator teeth in a one-to-one correspondence mode, the first windings at least comprise one first main winding, the rest of the first main windings are first auxiliary windings, when the first main windings fail, the first auxiliary windings start to operate to replace the first main windings, and the first main windings and the rest of the first auxiliary windings are independently controlled. The magnetic suspension bearing assembly adopting the structure is compact in structure, the axial length of the magnetic suspension bearing assembly can be shortened, and the stability and reliability of the magnetic suspension assembly can be improved.

Description

Magnetic suspension bearing assembly and motor with same

Technical Field

The utility model relates to a magnetic suspension bearing equipment technical field particularly, relates to a magnetic suspension bearing assembly and have its motor.

Background

The magnetic suspension bearing has a series of excellent qualities of no contact, no abrasion, high rotating speed, high precision, no need of lubrication and sealing and the like, and is a high and new technical product integrating electromagnetism, electronic technology, control engineering, signal processing and mechanics.

The magnetic bearing is divided into three types of active type, passive type and hybrid type, the active type magnetic bearing has high rigidity and can be precisely controlled, but the volume and the power consumption required by generating unit bearing capacity are larger. The passive magnetic bearing realizes the suspension of the rotor by utilizing the attractive force or the repulsive force between magnetic materials, and has lower rigidity and damping. The hybrid magnetic bearing uses the permanent magnet to provide a bias magnetic field to replace a static bias magnetic field generated by an electromagnet in an active magnetic bearing, reduces the ampere-turns of a control winding, reduces the volume of the bearing, improves the bearing capacity of the bearing and the like. The hybrid magnetic bearing has irreplaceable advantages in the field with strict requirements on volume and power consumption, and is mainly applied to high-speed and ultra-high-speed occasions. Therefore, the integration and miniaturization of the magnetic levitation system and the improvement of the stability and reliability of the control system will be the key research directions.

In order to realize contactless support of the rotor, the magnetic suspension bearing system needs to control five degrees of freedom of the space of the rotor. The traditional magnetic suspension structure adopts a permanent magnet biased front radial bearing and a permanent magnet biased rear radial bearing to control the radial four-degree-of-freedom suspension control of a rotating shaft, the permanent magnet biased axial bearing controls the axial degree-of-freedom suspension control of the rotating shaft, two groups of permanent magnet biased radial electromagnetic bearings and one group of permanent magnet biased axial bearing realize the five-degree-of-freedom suspension of a rotor space, a bias magnetic field is generated through a permanent magnet, a closed loop is formed through an auxiliary stator magnetic pole, the rotating shaft and a radial stator magnetic pole to form a permanent magnet bias magnetic field, bias magnetic fluxes are formed in a radial stator magnetic pole and a main air gap of the rotating shaft, control currents are introduced into radial horizontal and vertical control windings to generate a control magnetic field, the control magnetic field is formed through the inside of a stator iron core and the rotating shaft to adjust the bias magnetic fluxes between the radial stator magnetic pole and the main air gap of the rotating shaft, and the radial two-degree-of-freedom suspension control is realized. The permanent magnet generates a bias magnetic field, a closed loop is formed by the stator cores at the left end and the right end and the thrust disc to form the bias magnetic field, bias magnetic fluxes are formed in air gaps between the left stator core and the thrust disc and between the left stator core and the thrust disc, the control winding is connected with control current to form a control magnetic field, the closed loop is formed by the stator cores and the thrust disc to form a control magnetic circuit, and the bias magnetic fluxes in the stator cores at the left end and the right end and the thrust disc are adjusted to realize the axial suspension control of the rotating shaft. Each group of radial magnetic suspension bearings controls two radial degrees of freedom of the rotor, and the axial magnetic suspension bearings control the axial translational degree of freedom of the rotor. The magnetic suspension system structure has two disadvantages:

1. the two radial bearings and the axial bearing are arranged side by side, so that the axial length of the rotor is increased, the axial volume of the suspension system is increased, and the flexibility of the rotor is enhanced.

2. When the radial magnetic suspension bearing simultaneously controls the radial horizontal and vertical directions, the radial two-degree-of-freedom control magnetic fields are mutually coupled, the control logic is complex, the radial two-degree-of-freedom control winding is single, when a single winding breaks down, the control corresponding to the radial degree of freedom is invalid, a rotating shaft rotating at a high speed causes serious safety hazard, and the stability and the reliability of a suspension system are low.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a magnetic suspension bearing assembly and a motor having the same, which solve the problem of low reliability of the magnetic suspension bearing in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a magnetic suspension bearing assembly including a first stator assembly including: the first E-shaped stator assembly comprises a first E-shaped stator body and a plurality of first windings, a plurality of first stator teeth are arranged on the inner circle of the first E-shaped stator body, the first windings are multiple, the first windings are arranged on the first stator teeth in a one-to-one correspondence mode, the first windings at least comprise one first main winding, the rest first auxiliary windings are arranged on the inner circle of the first E-shaped stator body, when the first main winding fails, the first auxiliary windings start to operate to replace the first main winding, and the first main winding and the rest first auxiliary windings are independently controlled.

Further, the first stator assembly includes a first auxiliary stator core assembly, the plurality of first E-shaped stator assemblies being located on one side of the first auxiliary stator core assembly, the first auxiliary stator core assembly including: the magnetic shielding device comprises a first magnetic shielding frame, a second magnetic shielding frame and a plurality of first installation notches, wherein the first magnetic shielding frame is of an annular structure, and the outer edge of the first magnetic shielding frame is provided with the plurality of first installation notches; first supplementary stator core, first supplementary stator core are a plurality of, are provided with a first supplementary stator core in each first installation breach, and a plurality of first supplementary stator cores set up with a plurality of first E type stator module one-to-one.

Further, a plurality of first magnetism isolating plates are arranged on the surface of one side, facing the first E-shaped stator assembly, of the first magnetism isolating frame, and an installation space for installing the first E-shaped stator assembly is formed between the adjacent first magnetism isolating plates.

Further, a width of at least one of the plurality of first stator teeth in a radial direction is set differently from widths of the remaining first stator teeth.

Furthermore, the number of the first stator teeth is three, the three first stator teeth are arranged at intervals along the inner circumferential surface of the first E-shaped stator body, and the width of the first stator tooth in the middle is larger than the widths of the other two first stator teeth. Further, the number of the first stator teeth is three, the first winding arranged on the middle first stator tooth is a first main winding, and the first windings arranged on the other two first stator teeth are first auxiliary windings, or the first winding arranged on the middle first stator tooth is a first auxiliary winding, and the first windings arranged on the other two first stator teeth are first main windings.

Further, the plurality of first windings are independently controlled.

Furthermore, a groove is formed in the side wall, forming the first installation notch, of the first magnetism isolating frame, the groove extends along the radial direction of the first magnetism isolating frame, and a limiting protrusion matched with the groove is arranged on the side edge of the first auxiliary stator iron core.

Furthermore, a first magnetism isolating plate is arranged on the first magnetism isolating frame between the adjacent first installation notches.

Further, the magnetic bearing assembly further comprises: the permanent magnet assembly is arranged in the middle of the shell, and the first auxiliary stator core assembly is arranged in the shell and positioned on the first side of the permanent magnet assembly; a second stator assembly disposed within the housing and on a second side of the permanent magnet assembly, the second stator assembly disposed opposite the first stator assembly; the rotor assembly comprises a rotating shaft, an auxiliary rotor, a first conical rotor and a second conical rotor, the rotating shaft sequentially penetrates through the first conical rotor, the auxiliary rotor and the second conical rotor to be arranged in the first conical rotor, the auxiliary rotor, the permanent magnet assembly, the first stator assembly and the second stator assembly in a penetrating mode, the first conical rotor is arranged in a penetrating mode in a part of the first conical rotor, the part of the first stator assembly and the part of the second stator assembly, and the second conical rotor is arranged in a penetrating mode in the part of the second conical rotor; the first stator component and the second stator component are used for generating independent control magnetic fields, the permanent magnet component generates a bias magnetic field, the control magnetic field controls the rotating shaft to do translational motion along a Y axis or rotate around the Y axis by adjusting the bias magnetic field, or controls the rotating shaft to rotate around an X axis or do translational motion along the X axis, or controls the rotating shaft to do translational motion along a Z axis, the X axis and the Y axis are along the radial direction of the rotating shaft, and the Z axis is the axial direction of the rotating shaft.

Further, the first main windings are independently controlled, and the first auxiliary windings are arranged in series.

According to another aspect of the present invention, there is provided a motor, comprising a magnetic suspension bearing assembly, the magnetic suspension bearing assembly being the magnetic suspension bearing assembly described above.

Use the technical scheme of the utility model, set up first winding on each first stator tooth respectively, set one of them partial first winding to first main winding structure simultaneously, all the other first windings are first auxiliary winding structure, make when first main winding inefficacy appears in magnetic suspension bearing assembly operation in-process, first auxiliary winding structure can start the operation mode automatically, in order to reach and play supplementary stable effect in order to continue to maintain the balanced state of pivot through first auxiliary winding, this magnetic suspension bearing assembly's reliability has been improved effectively. Meanwhile, the magnetic suspension bearing assembly adopting the structure is compact in structure, the axial length of the magnetic suspension bearing assembly can be shortened, and the stability and reliability of the magnetic suspension assembly can be improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic cross-sectional structural view of a first embodiment of a magnetic bearing assembly according to the invention;

fig. 2 shows a schematic cross-sectional structural view of a second embodiment of a magnetic bearing assembly according to the invention;

fig. 3 shows a schematic cross-sectional structural view of a third embodiment of a magnetic bearing assembly according to the invention;

figure 4 shows a schematic cross-sectional structure of a fourth embodiment of a magnetic bearing assembly according to the invention;

figure 5 shows an exploded structural schematic of an embodiment of a magnetic levitation bearing assembly according to the present invention;

figure 6 shows an exploded structural schematic of an embodiment of a rotor assembly of a magnetic levitation bearing assembly according to the present invention;

figure 7 shows a force analysis diagram of a rotating shaft of a magnetic levitation bearing assembly according to the present invention in a first state;

figure 8 shows a force analysis diagram of a rotating shaft of a magnetic levitation bearing assembly according to the present invention in a second state;

figure 9 shows a force analysis diagram of a rotating shaft of a magnetic levitation bearing assembly according to the present invention in a third state;

figure 10 shows a force analysis diagram of a rotating shaft of a magnetic levitation bearing assembly according to the present invention in a fourth state;

fig. 11 shows a force analysis diagram of a fifth state of a rotating shaft of a magnetic levitation bearing assembly according to the present invention;

fig. 12 shows a schematic structural view of an embodiment of a shaft of a magnetic levitation bearing assembly according to the present invention.

Wherein the figures include the following reference numerals:

10. a housing;

20. a permanent magnet assembly; 21. a magnetic steel fixing frame; 22. a permanent magnet;

30. a first stator assembly; 31. a first auxiliary stator core assembly; 311. a first magnetism isolating frame; 312. a first mounting notch; 313. a first auxiliary stator core; 314. a first magnetic shield;

32. a first E-shaped stator assembly; 321. a first E-shaped stator body; 322. a first stator tooth; 323. a first winding;

40. a second stator assembly; 41. a second auxiliary stator core assembly; 411. a second magnetism isolating frame; 412. a second mounting notch; 413. a second auxiliary stator core; 414. a second magnetic shield;

42. a second E-shaped stator assembly; 421. a second E-shaped stator body; 422. a second stator tooth; 423. a second winding;

50. a rotor assembly; 51. a rotating shaft; 52. an auxiliary rotor; 53. a first conical rotor; 54. a second conical rotor;

60. a first fixing plate;

70. a second fixing plate;

80. precision screw caps.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1-12, according to an embodiment of the present application, a magnetic bearing assembly is provided.

Specifically, the magnetic bearing assembly includes a first stator assembly 30. The first stator assembly 30 includes a first E-type stator assembly 32. The first E-shaped stator assembly 32 is provided in plurality, the first E-shaped stator assembly 32 is defined in a ring structure, the first E-shaped stator assembly 32 includes a first E-shaped stator body 321 and a first winding 323, and a plurality of first stator teeth 322 are provided on an inner circle of the first E-shaped stator body 321. The first windings 323 are multiple, the multiple first windings 323 are correspondingly arranged on the multiple first stator teeth 322 one by one, at least one first main winding is included in the multiple first windings 323, the rest are first auxiliary windings, when the first main winding fails, the first auxiliary winding starts to operate to replace the first main winding, and the first main winding and the rest of the first auxiliary windings are independently controlled.

In this embodiment, the first windings are respectively arranged on each first stator tooth, and meanwhile, a part of the first windings are arranged to be the first main winding structure, and the rest of the first windings are the first auxiliary winding structure, so that when the first main winding fails in the operation process of the magnetic suspension bearing assembly, the first auxiliary winding structure can automatically perform a starting operation mode, so that the first auxiliary winding plays a role of auxiliary stabilization to continuously maintain the balance state of the rotating shaft, and the reliability of the magnetic suspension bearing assembly is effectively improved. Meanwhile, the magnetic suspension bearing assembly adopting the structure is compact in structure, the axial length of the magnetic suspension bearing assembly can be shortened, and the stability and reliability of the magnetic suspension assembly can be improved.

The magnetic levitation bearing assembly includes a housing 10, a permanent magnet assembly 20, a first stator assembly 30, a second stator assembly 40, and a rotor assembly 50. The permanent magnet assembly 20 is disposed in the case 10; the first stator assembly 30 is disposed at the case 10 and located at a first side of the permanent magnet assembly 20; a second stator assembly 40 is disposed within the housing 10 on a second side of the permanent magnet assembly 20, the second stator assembly 40 being disposed opposite the first stator assembly 30; the rotor assembly 50 comprises a rotating shaft 51, and the rotating shaft 51 sequentially penetrates through the first stator assembly 30, the permanent magnet assembly 20 and the second stator assembly 40; the first stator assembly 30 and the second stator assembly 40 are configured to generate independent control magnetic fields, the permanent magnet assembly 20 generates a bias magnetic field, and the control magnetic field controls the rotating shaft 51 to perform translational motion along the Y axis or rotate around the Y axis by adjusting the bias magnetic field, or controls the rotating shaft 51 to rotate around the X axis or perform translational motion along the X axis, or controls the rotating shaft 51 to perform translational motion along the Z axis, where the X axis and the Y axis are along the radial direction of the rotating shaft 51, and the Z axis is the axial direction of the rotating shaft 51.

In the embodiment, by arranging the permanent magnet assembly in the housing, arranging the first stator assembly 30 and the first stator assembly 30 on two sides of the permanent magnet assembly respectively, and arranging the first stator assembly 30 and the first stator assembly 30 in an arrangement mode of generating an independent control magnetic field, the arrangement can avoid the problem that the first stator assembly 30 and the first stator assembly 30 are coupled during operation to cause low stability of the magnetic suspension bearing assembly. Because the first stator assembly 30 and the first stator assembly 30 are respectively arranged on the two sides of the permanent magnet assembly, the axial length of the magnetic suspension bearing assembly can be effectively shortened. The magnetic suspension bearing assembly adopting the structure has the advantages of compact structure, simple structure and good stability.

Therein, the first stator assembly 30 includes a first auxiliary stator core assembly 31 and a first E-shaped stator assembly 32. A first auxiliary stator core assembly 31 is disposed within the housing 10 and on a first side of the permanent magnet assembly 20. The setting can make radial level, vertical degree of freedom control system separation like this to make radial level and vertical direction degree of freedom control magnetic circuit mutual independence set up, simplify radial degree of freedom control logic, improve magnetic suspension bearing radial control's stability and reliability.

As shown in fig. 1 to 5, the first auxiliary stator core assembly 31 includes a first magnetism isolating frame 311, a first auxiliary stator core 313. The first magnetism isolating frame 311 is a ring-shaped structure, and a plurality of first installation notches 312 are arranged at the outer edge of the first magnetism isolating frame 311. The number of the first auxiliary stator cores 313 is plural, one first auxiliary stator core 313 is disposed in each first mounting notch 312, and the plural first auxiliary stator cores 313 and the plural first E-shaped stator assemblies 32 are disposed in one-to-one correspondence. This arrangement can improve the mounting stability of the first auxiliary stator core 313.

As shown in fig. 3 and 5, a plurality of first flux barriers 314 are disposed on a surface of the first flux barrier 311 facing the first E-shaped stator assembly 32, and an installation space for installing the first E-shaped stator assembly 32 is formed between adjacent first flux barriers 314. The arrangement can avoid magnetic leakage between the adjacent first E-shaped stator assemblies 32, so that the condition of magnetic circuit confusion is caused, and the arrangement can ensure that an independent control magnetic circuit can be formed between the adjacent first E-shaped stator assemblies 32.

Specifically, the first E-shaped stator assembly 32 includes a first E-shaped stator body 321. A plurality of first stator teeth 322 are disposed on an inner circle of the first E-shaped stator body 321, and a width of at least one first stator tooth 322 of the plurality of first stator teeth 322 in a radial direction is set differently from widths of the remaining first stator teeth 322. The arrangement can determine the number of turns of the winding wound on each first stator tooth 322 and the magnitude of the current according to the width of different first stator teeth 322. Further improving the practicability of the magnetic suspension bearing assembly.

Further, the first E-type stator assembly 32 includes first windings 323. The first winding 323 is plural, the plural first windings 323 are respectively disposed on the plural first stator teeth 322, so that each first stator tooth 322 is provided with one first winding 323, and at least one of the plural first windings 323 is independently controlled from the remaining first windings 323. This arrangement enables each first winding 323 to generate an independent control magnetic field, effectively avoiding coupling between the first windings 323.

Among them, the plurality of first windings 323 includes at least one first main winding, and the others are first auxiliary windings, and when the first main winding fails, the first auxiliary winding starts to operate to replace the first main winding, the first main winding is controlled independently from the remaining first auxiliary windings, and all the first auxiliary windings are arranged in series. The arrangement can improve the stability and reliability of the magnetic suspension bearing assembly. Of course, it is also possible to arrange all first windings in an independently controlled manner

In one embodiment of the present application, the angles of the central angles corresponding to the molded lines of the outer circumferential surfaces of the adjacent first E-shaped stator bodies 321 may be set differently.

Specifically, the second stator assembly 40 includes a second auxiliary stator core assembly 41 and a second E-type stator assembly 42. A second auxiliary stator core assembly 41 is disposed within the housing 10 on a second side of the permanent magnet assembly 20. The second E-shaped stator assemblies 42 are multiple, the second E-shaped stator assemblies 42 are enclosed to form an annular structure and are located on one side of the second auxiliary stator core assembly 41 away from the permanent magnet assembly 20, and the second E-shaped stator assemblies 42 are matched with the second auxiliary stator core assembly 41 to form multiple independent control magnetic circuits in the radial direction of the second stator assembly 40. Wherein the second side of the permanent magnet assembly 20 is arranged opposite to the first side of the permanent magnet assembly 20 described above.

Wherein the second auxiliary stator core assembly 41 includes a second magnetism isolating frame 411 and a second auxiliary stator core 413. The second magnetism isolating frame 411 is of a ring-shaped structure, and a plurality of second installation notches 412 are arranged at the outer edge of the second magnetism isolating frame 411. The number of the second auxiliary stator cores 413 is plural, one second auxiliary stator core 413 is provided in each second mounting notch 412, and the plural second auxiliary stator cores 413 and the plural second E-shaped stator assemblies 42 are provided in one-to-one correspondence. This arrangement can improve the mounting reliability of the second auxiliary stator core 413.

Specifically, the second E-type stator assembly 42 includes a second E-type stator body 421, a second winding 423. A plurality of second stator teeth 422 are provided on an inner circle of the second E-shaped stator body 421, and a width of at least one second stator tooth 422 of the plurality of second stator teeth 422 in a radial direction is set differently from widths of the remaining second stator teeth 422. The plurality of second windings 423 are provided, the plurality of second windings 423 are respectively disposed on the plurality of second stator teeth 422, such that each second stator tooth 422 is provided with one second winding 423, and at least one of the plurality of second windings 423 is independently controlled from the remaining second windings 423. The plurality of second windings 423 includes at least one second main winding, and the others are second auxiliary windings, and when the second main winding fails, the second auxiliary windings start to operate in place of the second main winding, the second main winding is controlled independently of the remaining second auxiliary windings, and all of the second auxiliary windings are arranged in series. The arrangement enables each winding to generate an independent control magnetic field, and effectively avoids the condition of coupling between the windings. By adopting the arrangement mode of the auxiliary winding and the main winding, the auxiliary winding can replace the second main winding when the main winding fails, and the reliability and the stability of the magnetic suspension bearing assembly are further improved.

In another embodiment of the present application, the angles of the central angles corresponding to the molded lines of the outer circumferential surfaces of the adjacent second E-shaped stator bodies 421 may be set in different setting manners.

As shown in fig. 5, the permanent magnet assembly 20 includes a magnetic steel fixing frame 21. Magnet steel mount 21 is the annular structure, and magnet steel mount 21 sets up in the middle part of casing 10, and a plurality of magnet steel installation departments have been seted up to magnet steel mount 21's outward flange department, all is provided with a permanent magnet 22 in a plurality of magnet steel installation departments, and magnet steel mount 21 sets up with first magnetism frame 311 is coaxial, and permanent magnet 22 in a plurality of magnet steel installation departments sets up with first supplementary stator core 313 one-to-one, and wherein, the installation department can be the mounting groove. This arrangement can improve the mounting stability of the permanent magnet 22.

The rotor assembly 50 includes an auxiliary rotor 52, a first tapered rotor 53, and a second tapered rotor 54. The auxiliary rotor 52 is disposed in the housing 10. The first conical rotor 53 is provided in the housing 10 and abuts against a first end of the auxiliary rotor 52. The second tapered rotor 54 is disposed in the housing 10 and abuts against the second end of the auxiliary rotor 52, and the rotating shaft 51 is disposed through the first tapered rotor 53, the auxiliary rotor 52, and the second tapered rotor 54 in this order. This arrangement can improve the stability of the magnetic bearing assembly.

In order to further improve the stability of the magnetic bearing, the magnetic bearing assembly further comprises a first fixing plate 60 and a second fixing plate 70. The first fixing plate 60 is connected to an end of the first end of the housing 10. The second fixing plate 70 is connected to an end of the second end of the housing 10.

Preferably, there are three first stator teeth 322, the first winding 323 disposed on the middle first stator tooth 322 is a first main winding, and the first winding 323 disposed on the remaining two first stator teeth 322 is a first auxiliary winding, or the first winding 323 disposed on the middle first stator tooth 322 is a first auxiliary winding, and the first winding 323 disposed on the remaining two first stator teeth 322 is a first main winding. Of course, the first winding 323 disposed on the middle first stator tooth 322 may be provided as the first auxiliary winding, and the first windings 323 disposed on the remaining two first stator teeth 322 may be provided as the first main winding.

In another embodiment of the present application, the second stator assembly 40 includes a second E-type stator assembly 42. The second E-shaped stator body 421 of the second E-shaped stator assembly 42 has three second stator teeth 422. Three second stator teeth 422 are provided at intervals along an inner circumferential surface of the second E-shaped stator body 421. The width of the second stator tooth 422 located in the middle is larger than the widths of the second stator teeth 422 of the remaining two. The number of the first stator teeth 322 is three, the three first stator teeth 322 are disposed at intervals along the inner circumferential surface of the first E-shaped stator body 321, and the width of the first stator tooth 322 located in the middle is greater than the widths of the remaining two first stator teeth 322. The arrangement can arrange the winding on the middle stator tooth as a main winding, and further improves the stability of the magnetic suspension bearing assembly. In the present embodiment, the second stator assembly 40 includes the second E-shaped stator assembly 42, the number of the second E-shaped stator assemblies 42 is four, six, or eight, and the number of the first E-shaped stator bodies 321 is four, six, or eight.

In yet another embodiment of the present application, a magnetic bearing assembly is provided. The magnetic bearing assembly includes a first stator assembly 30. The first stator assembly 30 includes a first auxiliary stator core assembly 31, a first E-shaped stator assembly 32. The first E-shaped stator assembly 32 is provided in plurality, the first E-shaped stator assembly 32 is enclosed to form an annular structure and is located at one side of the first auxiliary stator core assembly 31, and the first E-shaped stator assembly 32 is matched with the first auxiliary stator core assembly 31 to form a plurality of independent control magnetic circuits in the radial direction of the first stator assembly 30.

In the present embodiment, a plurality of first E-shaped stator assemblies 32 are provided to cooperate with the first auxiliary stator core assembly 31, and a plurality of independent control magnetic paths are formed in the radial direction of the first stator assembly 30. The arrangement can avoid the problem that the magnetic suspension assembly is low in reliability due to the fact that the first E-shaped stator assemblies 32 are coupled. Meanwhile, the magnetic suspension bearing assembly adopting the structure is compact in structure, the axial length of the magnetic suspension bearing assembly can be shortened, and the stability and reliability of the magnetic suspension assembly can be improved.

Specifically, in the present embodiment, the first auxiliary stator core assembly 31 includes a first magnetism isolating frame 311, a first auxiliary stator core 313. The first magnetism isolating frame 311 is a ring-shaped structure, and a plurality of first installation notches 312 are arranged at the outer edge of the first magnetism isolating frame 311. The number of the first auxiliary stator cores 313 is plural, one first auxiliary stator core 313 is disposed in each first mounting notch 312, and the plural first auxiliary stator cores 313 and the plural first E-shaped stator assemblies 32 are disposed in one-to-one correspondence. A plurality of first magnetic shield plates 314 are disposed on a surface of the first magnetic shield 311 facing the first E-shaped stator assembly 32, and an installation space for installing the first E-shaped stator assembly 32 is formed between the adjacent first magnetic shield plates 314. This arrangement can improve the stability and reliability of the first auxiliary stator core assembly 31.

Further, the first E-shaped stator assembly 32 includes a first E-shaped stator body 321 and a first winding 323. A plurality of first stator teeth 322 are disposed on an inner circle of the first E-shaped stator body 321, and a width of at least one first stator tooth 322 of the plurality of first stator teeth 322 in a radial direction is set differently from widths of the remaining first stator teeth 322. The first winding 323 is plural, the plural first windings 323 are respectively disposed on the plural first stator teeth 322, so that one first winding 323 is disposed on each first stator tooth 322, and the plural first windings 323 are independently controlled. The arrangement can independently realize the control of each winding, for example, when one winding fails, the current connected to other windings can be controlled to increase so as to ensure that the rotating shaft always rotates in a stable state. Preferably, the plurality of first windings 323 includes at least one first main winding, and the rest are first auxiliary windings, and when the first main winding fails, the first auxiliary windings start to operate to replace the main winding.

A groove is formed in the side wall of the first magnetism isolating frame 311, which forms the first installation notch 312, and extends along the radial direction of the first magnetism isolating frame 311, and a limit protrusion matched with the groove is arranged on the side edge of the first auxiliary stator core 313. This arrangement can improve the mounting stability of the first auxiliary stator core 313.

A first magnetism isolating plate 314 is arranged on the first magnetism isolating frame 311 between the adjacent first installation notches 312. The arrangement enables the first E-shaped stator body 321 located between the first magnetic isolation plates 314 to cooperate with the windings to form an independent control magnetic field, and further improves the stability of the magnetic suspension assembly.

Further, the magnetic bearing assembly also comprises a housing 10. A permanent magnet assembly 20 is disposed at the middle portion in the housing 10, and a first auxiliary stator core assembly 31 is disposed in the housing 10 and located at a first side of the permanent magnet assembly 20. A second stator assembly 40 is disposed within the housing 10 on a second side of the permanent magnet assembly 20, the second stator assembly 40 being disposed opposite the first stator assembly 30. The rotor assembly 50 includes a rotating shaft 51, an auxiliary rotor 52, a first tapered rotor 53 and a second tapered rotor 54, the rotating shaft 51 is sequentially disposed through the first tapered rotor 53, the auxiliary rotor 52 and the second tapered rotor 54, the auxiliary rotor 52 is disposed in cooperation with the permanent magnet assembly 20, the first stator assembly 30 and the second stator assembly 40, the first tapered rotor 53 is disposed in cooperation with a portion of the first stator assembly 30, and the second tapered rotor 54 is disposed in cooperation with a portion of the second stator assembly 40. The first stator assembly 30 and the second stator assembly 40 are used for generating independent control magnetic fields, and the rotating shaft 51 is controlled to do translational motion along the Y axis or rotate around the Y axis, or the rotating shaft 51 is controlled to rotate around the X axis or do translational motion along the X axis by the control magnetic fields generated by the permanent magnet assembly 20, the first stator assembly 30 and the second stator assembly 40, the X axis and the Y axis are along the radial direction of the rotating shaft 51, and the Z axis is the axial direction of the rotating shaft 51. The magnetic suspension assembly can realize five-degree-of-freedom control of the rotating shaft, and the stability and reliability of the magnetic suspension assembly are further improved.

The magnetic suspension bearing assembly in the above embodiments can also be used in the technical field of motor equipment, namely according to the utility model discloses a further aspect provides a motor, including the magnetic suspension bearing assembly, the magnetic suspension bearing assembly is the magnetic suspension bearing assembly in the above embodiments.

Specifically, in order to solve the problems that in a five-degree-of-freedom suspension system in the prior art, two radial bearings and an axial bearing are arranged in parallel, so that the axial space of the five-degree-of-freedom suspension system is increased, the axial length of a rotor is extended, the flexibility is increased, the mutual coupling between the radial horizontal control magnetic field and the radial vertical control magnetic field of a radial permanent magnet offset bearing is abnormal, the control logic of a magnetic suspension system is complex, and the stability and reliability of the magnetic suspension bearing control system are poor, the application provides a novel magnetic circuit decoupling five-degree-of-freedom magnetic suspension bearing assembly. As shown in fig. 12, the rotating shaft 51 realizes five-degree-of-freedom suspension, that is, five-degree-of-freedom direction control of rotation of the rotating shaft 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).

As shown in fig. 2, the rotating shaft 51, the first tapered rotor 53, the second tapered rotor 54, the first auxiliary stator core 313, the second auxiliary stator core 413, the permanent magnet 22, the second stator tooth 422, the second tapered rotor 54, the auxiliary rotor 52, the first magnetic shield 314, the second magnetic shield 414, and the first winding 323 form a five-degree-of-freedom suspension system, so as to implement five-degree-of-freedom direction control of the rotating shaft. The permanent magnet 22 generates a bias magnetic field, a closed loop is formed by the first auxiliary stator core 313, the second auxiliary stator core 413, the first stator tooth 322, the second stator tooth 422, the auxiliary rotor 52, the first conical rotor 53 and the second conical rotor 54 to form a front radial-axial bias magnetic field C1 and a rear radial-axial bias magnetic field C1, a bias magnetic flux is formed between the first stator tooth 322 and the first conical rotor 53 and in a main air gap between the second stator tooth 422 and the second conical rotor 54, the radial-axial control winding generates a control magnetic field, a closed loop is formed by the main magnetic pole, the stator, the side end auxiliary two magnetic poles and the rotor to form a horizontal radial-axial control magnetic field C2, the same manner as that of forming the vertical radial-axial control magnetic field C3, the radial-axial control main winding is a main control winding, and when the rotating shaft deviates at different degrees of freedom, the main winding is used for control, when the main winding breaks down, the radial-axial auxiliary windings on the auxiliary magnetic poles on the two sides of the main winding are started to realize the control of different degrees of freedom of the rotating shaft, the horizontal radial-axial control magnetic field C2 and the vertical radial-axial control magnetic field C3 are arranged independently and are not coupled with each other, and the radial horizontal and vertical independent regulation and control of the rotating shaft are realized, so that the control logic of a magnetic suspension system is simplified, and the stability and the reliability of the system are improved. The front radial bearing stator and the rear radial bearing stator are of an integrated structure, the force is exerted by conical magnetic poles in the axial-radial degree of freedom control, and the extra occupied space of the axial bearing is reduced, so that the axial utilization space of the magnetic suspension system is reduced, the length of a rotating shaft is shortened, the flexibility is reduced, control components are reduced, and the material cost of the magnetic suspension system is low.

As shown in fig. 1 and fig. 7 to fig. 12, the left side in the drawings is defined as the front end of the magnetic suspension bearing assembly, the right side is the rear end of the magnetic suspension bearing assembly, F1, F2, F3 and F4 are the output models of the magnetic poles of the front end radial horizontal-axial stator and the rear end radial horizontal-axial stator on the shaft, and F1, F2, F3 and F4 are the output models of the magnetic poles of the front end radial vertical-axial stator and the rear end radial vertical-axial stator on the shaft. As shown in fig. 7 and 8, the stress model of the rotating shaft is shown when the rotating shaft is in the equilibrium position, where F1-F2-F3-F4-F1-F2-F3-F4, and the resultant force applied to the rotating shaft is zero. When the rotating shaft is impacted in the radial horizontal direction, the rotating shaft deflects downwards, as shown in fig. 3, the rotating shaft moves downwards, the gaps at the upper ends of the front and rear radial-axial rotors (the first conical rotor 53 and the second conical rotor 54) and the front and rear radial-axial stators (the first auxiliary stator core 313 and the second auxiliary stator core 413) are increased, the bias magnetic flux of the front and rear gap-axial bias magnetic field C1 at the air gap at the upper end is reduced, the gap at the lower end is reduced, the bias magnetic flux is increased, when the area of the magnetic pole is fixed, the magnetic field attraction force is in direct proportion to the square of the magnetic flux, the downward attraction force is greater than the upward attraction force, no external interference exists, the rotating shaft continuously deflects downwards, and the rotating shaft cannot return to the balance position. The front and rear radial horizontal-axial control main windings are supplied with the same control current to generate a control magnetic field, the magnetic flux at the front and rear gaps is adjusted to enable a stress model of the rotating shaft to be as shown in fig. 9, the radial horizontal stress is F1 ═ F3> F2 ═ F4, the radial vertical stress is F1 ═ F2 ═ F3 ═ F4, the rotating shaft moves upwards along the radial horizontal direction until the rotating shaft returns to a balance position, the control windings stop supplying the control current, and the stress of the rotating shaft returns to the positions shown in fig. 7 and 8 at the balance position. When the rotating shaft bears impact and rotates around a Y axis (radial horizontal) in the anticlockwise direction, the gap between the first conical rotor 53 and the upper end of the first auxiliary stator core 313 is increased, the bias magnetic flux is reduced, the gap between the lower end of the first conical rotor is reduced, the bias magnetic flux is increased, the suction force at the lower end of the first conical rotor is greater than the suction force at the upper end of the first auxiliary stator core, the left end of the rotating shaft moves downwards, the right end of the rotating shaft generates upward suction force which is greater than the downward suction force in the same way, the right end of the rotating shaft moves upwards, no external interference exists, and the rotating shaft continuously rotates anticlockwise. Opposite control currents are introduced into the front and rear radial horizontal-axial control main windings to generate control magnetic fields, the magnetic flux at the front and rear gaps is adjusted, a stress model of the rotating shaft is shown in fig. 10, the radial horizontal stress F1 is F4> F2 is F3, the radial vertical stress F1 is F2 is F3 is F4, the rotating shaft rotates clockwise around the Y axis until the balance position is recovered, the control windings are stopped to be electrified, and similarly, when the rotating shaft rotates around the X axis to impact, the control principle is the same. When the rotating shaft is axially displaced and impacts leftwards, the gap between the rotating shaft at the left end of the rotating shaft and the stator is increased, the magnetic flux is reduced, the gap between the rotating shaft at the right end of the rotating shaft and the stator is reduced, the magnetic flux is increased, the total suction force at the right end is greater than the total suction force at the left end, and the rotating shaft continuously moves leftwards and cannot be recovered. The main windings on the four magnetic poles of the first auxiliary stator core 313 are fed with control currents with the same size and different directions, so that the attraction force of the stator to the rotor is increased (F1, F2, F1 and F2 are increased), the main windings on the four magnetic poles of the second auxiliary stator core 413 are fed with control currents with the same size and different directions, the attraction force of the stator to the rotor is decreased (F3, F4, F3 and F4 are decreased), as shown in fig. 11, (F1 ═ F2 ═ F1 ═ F2 ═ F3 ═ F4 ═ F3 ═ F4), the rotor shaft moves to the right end until the balance is restored, the control windings are stopped to be electrified, and the control of the axial degree of freedom of the rotor shaft is realized.

By adopting the magnetic suspension bearing assembly, the problems that in the prior art, double radial bearings and axial bearings are arranged in parallel, the axial span of a magnetic suspension system is large, the length of a rotating shaft is long, the flexibility is large, a plurality of control components are needed, and the material cost of the magnetic suspension system is high are solved, and the problems that in the prior art, the magnetic suspension assembly has the advantages of radial horizontal and vertical freedom degree control magnetic circuit coupling, complex control logic, single control winding and low control system reliability are solved.

The magnetic suspension bearing assembly adopts a double-radial bearing-axial bearing integrated structure arrangement structure, and axial-radial freedom degrees share conical magnetic pole force control. The whole magnetic suspension system has small axial space, short length of the rotating shaft, low flexibility and one set of control components shared in the axial direction and the radial direction, so that the use number of the components and the use cost of materials of the magnetic suspension system are reduced.

The double-radial integrated structure has the advantages that the double-radial magnetic poles realize four-degree-of-freedom suspension on the rotating shaft, the axial control on the rotating shaft is realized by utilizing the edge effect of the magnetic poles, the five-degree-of-freedom suspension on the rotating shaft is realized, the number of components is reduced, the material cost and the occupied space of an axial bearing are saved, the main control winding and the auxiliary control winding are wound on the main magnetic pole and the auxiliary magnetic pole of the E-pole magnetic pole, the radial-axial-degree-of-freedom multi-winding control is realized, the magnetic suspension system is in an uncontrolled state when the control fault of a single winding is avoided, and the stability and the reliability of the magnetic suspension system are improved.

The axial-radial freedom degree shares the conical magnetic pole, the force of the conical magnetic pole can control the suspension control of the five degrees of freedom of the rotating shaft, and the radial freedom degree control and the axial freedom degree control share one set of control elements to reduce the occupied space of the magnetic suspension axial direction, so that the rotating shaft is short in length and small in flexibility, the number of components is reduced, and the material cost is saved.

As shown in fig. 3 and 4, in the dual-radial integrated structure, the dual-radial magnetic poles realize four-degree-of-freedom suspension on the rotating shaft, and the axial control on the rotating shaft is realized by utilizing the edge effect of the magnetic poles, so that five-degree-of-freedom suspension on the rotating shaft is realized, the number of components is reduced, and the material cost and the occupied space of the axial bearing are saved.

The E-shaped magnetic pole structure separates the radial horizontal and vertical freedom control systems, the control magnetic fields are not coupled and are independent of each other, the control logic of the radial freedom is simplified, and the stability of the magnetic suspension system is improved.

The main and auxiliary control windings of the E pole are wound to control the radial-axial freedom degree multi-winding, the main pole and the auxiliary pole are mutually independent, when a certain main control winding breaks down, the auxiliary control windings on two sides are connected with corresponding control currents, a control magnetic field with the same function as the main control winding can be generated, the corresponding control function is realized, and the reliability of the magnetic suspension system is improved.

As shown in fig. 1 and 5, the component for realizing five-degree-of-freedom control of the rotating shaft is composed of the rotating shaft 1, an auxiliary rotor 52, a first tapered rotor 53, a precision nut 80, a second tapered rotor 54, a first fixing plate 60, a second fixing plate 70, a first winding 323 (including a main winding and an auxiliary winding), a first E-shaped stator body 321, a first auxiliary stator core 313, a second auxiliary stator core 413, a first magnetism isolating frame 311, a second magnetism isolating frame 411, a housing 10, a permanent magnet 22, a magnetic steel fixing frame 21, a second winding 423 (including a main winding and an auxiliary winding), and a second E-shaped stator body 421. The permanent magnet 22-bit fan-shaped structure is embedded on the magnetic steel fixing frame 21 in a viscose mode, the magnetic steel fixing frame 21 is installed in the shell 10 in a hot jacket mode, and a convex step is arranged in the shell 10 to axially position the magnetic steel fixing frame, so that the permanent magnet 22 is fixedly installed. The magnetic isolation frame (the first magnetic isolation frame and the second magnetic isolation frame) for fixing the iron core fixes the first auxiliary stator iron core 313 and the second auxiliary stator iron core 413 through a gluing process, and the four magnetic isolation plates on the side face isolate and fix the four block radial stators. A separate magnetic frame for the iron core is fixed installs in stator casing both sides through the hot jacket mode, and first supplementary stator core 313, the supplementary stator core 413 of second align the assembly with fan-shaped permanent magnet, and there is miniature boss at the both ends of first supplementary stator core 313 and the supplementary stator core 413 of second, docks with the magnet steel mount, realizes supplementary stator core's fixed mounting. The main winding in the first winding and the main winding in the second winding are respectively installed on the main magnetic poles of the first E-shaped stator body and the second E-shaped stator body in a binding and gluing mode, the four main control windings are arranged independently, the auxiliary winding in the first winding and the auxiliary winding in the second winding are respectively wound on the auxiliary magnetic poles of the first E-shaped stator body and the second E-shaped stator body, the auxiliary windings on two sides of each main magnetic pole are arranged in series to form a segmented stator assembly, the segmented stator assembly is installed on a fixed magnetic separation frame in a shell in a hot jacket mode, radial positioning is carried out through four convex magnetic separation plates of the magnetic separation frame, axial positioning is carried out on the segmented stator assembly through a fixing plate, and the magnetic suspension stator assembly is installed and fixed through the process. The auxiliary rotor is installed by the left end of the rotating shaft in a hot sleeving mode, the rotating shaft is provided with a miniature boss for carrying out axial positioning on the auxiliary rotor, the first conical rotor 53 is hot sleeved at the left end of the rotating shaft 51, the end face of the first conical rotor 53 is precisely attached to the end face of the auxiliary rotor 52, the first conical rotor 53 is axially fixedly installed through a precision nut 80 to form a rotor assembly, the rotor assembly is inserted into the shaft from the left end of the stator assembly, the second conical rotor 54 is installed from the hot sleeved at the right end of the rotating shaft 51, the left end face of the second conical rotor 54 is precisely attached to the right end face of the auxiliary rotor 52, the fixed installation of the second conical rotor 54 is completed through the precision nut 80, and therefore the installation and implementation of the whole five-degree-of-freedom magnetic suspension system are completed.

Magnetic forces F1, F2, F3, F4, F1, F2, F3 and F4 in fig. 7 to 11 are generated between the first E-shaped stator body 321 and the second E-shaped stator body 421 and the first conical rotor 53 and the second conical rotor 54, so that the radial four-degree-of-freedom suspension and the axial degree-of-freedom suspension control of the rotating shaft can be respectively regulated and controlled. The permanent magnet 22 generates a bias magnetic field, a closed loop is formed by the auxiliary stator cores on the left and right sides of the permanent magnet 22, the first conical rotor 53, the second conical rotor 54, the first E-shaped stator body 321, the second E-shaped stator body 421 and the auxiliary rotor 52, a homopolar bias magnetic field is formed, and a bias magnetic flux is formed between the E-pole conical stator and the conical rotor. The main winding is connected with a control current to form a control magnetic field, a closed loop is formed by the main magnetic pole, the auxiliary magnetic pole and the conical rotors (the first conical rotor 53 and the second conical rotor 54) to form a heteropolarity control magnetic field, and the suspension control of five degrees of freedom of the rotating shaft is realized by adjusting the bias magnetic flux between the stator and the rotor. The conical magnetic pole realizes a radial-axial integrated structure, reduces the axial utilization space of a magnetic suspension system, reduces the number of control elements and reduces the material cost. By adopting the E pole magnetic pole structure, the independent control of the degree of freedom in the radial horizontal direction and the vertical direction is realized, the magnetic circuit is decoupled, the control logic is simplified, and the stability of the system is improved. Two auxiliary control windings are arranged on the auxiliary magnetic pole of the E-pole magnetic pole, when the main control winding fails, the auxiliary control winding can achieve the same control function as the main control winding, a multi-winding control system is formed, and the reliability of the magnetic suspension system is improved.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A magnetic bearing assembly, characterized by comprising a first stator assembly (30), the first stator assembly (30) comprising:

a plurality of first E-shaped stator assemblies (32), wherein the plurality of first E-shaped stator assemblies (32) surround to form a ring-shaped structure, the first E-shaped stator assembly (32) comprises a first E-shaped stator body (321) and a first winding (323), a plurality of first stator teeth (322) are arranged on the inner circle of the first E-shaped stator body (321), the number of the first windings (323) is multiple, the first windings (323) are correspondingly arranged on the first stator teeth (322) one by one, at least one first main winding is included in the first windings (323), the remainder being a first auxiliary winding that begins operation to replace the first main winding when the first main winding fails, the first main winding being controlled independently of the remainder of the first auxiliary winding.

2. The magnetic bearing assembly according to claim 1, characterized in that the first stator assembly (30) comprises a first auxiliary stator core assembly (31), a plurality of the first E-shaped stator assemblies (32) being located at one side of the first auxiliary stator core assembly (31), the first auxiliary stator core assembly (31) comprising:

the magnetic shielding device comprises a first magnetic shielding frame (311), wherein the first magnetic shielding frame (311) is of an annular structure, and a plurality of first installation notches (312) are formed in the outer edge of the first magnetic shielding frame (311);

the stator comprises a plurality of first auxiliary stator cores (313), one first auxiliary stator core (313) is arranged in each first installation notch (312), and the plurality of first auxiliary stator cores (313) and the plurality of first E-shaped stator assemblies (32) are arranged in a one-to-one correspondence mode.

3. The magnetic levitation bearing assembly as recited in claim 2, wherein a plurality of first magnetic shield plates (314) are disposed on a surface of the first magnetic shield frame (311) facing a side of the first E-shaped stator assembly (32), and an installation space for installing the first E-shaped stator assembly (32) is formed between adjacent first magnetic shield plates (314).

4. The magnetic bearing assembly according to claim 1,

at least one of the first stator teeth (322) is arranged to have a width in a radial direction different from widths of the remaining first stator teeth (322).

5. The magnetic bearing assembly according to claim 4, characterized in that the first stator teeth (322) are three, three of the first stator teeth (322) are arranged at intervals along the inner circumferential surface of the first E-shaped stator body (321), and the width of the first stator tooth (322) in the middle is greater than the widths of the first stator teeth (322) of the remaining two.

6. Magnetic bearing assembly according to claim 4 or 5, characterized in that the first stator teeth (322) are three, the first winding (323) arranged on the middle first stator tooth (322) is the first main winding and the first windings (323) on the remaining two first stator teeth (322) are first auxiliary windings, or the first winding (323) arranged on the middle first stator tooth (322) is the first auxiliary winding and the first windings (323) on the remaining two first stator teeth (322) are first main windings.

7. Magnetic bearing assembly according to any of claims 1 to 5, characterized in that a plurality of the first windings (323) are controlled independently.

8. The magnetic suspension bearing assembly according to claim 2, characterized in that a groove is formed in a side wall of the first magnetic shielding frame (311) forming the first mounting notch (312), the groove extends along a radial direction of the first magnetic shielding frame (311), and a limiting protrusion matching with the groove is arranged on a side edge of the first auxiliary stator core (313).

9. The magnetic bearing assembly according to claim 3, characterized in that one first magnetic shield plate (314) is arranged on the first magnetic shield frame (311) between adjacent first mounting notches (312).

10. The magnetic bearing assembly of claim 2, further comprising:

the permanent magnet motor comprises a shell (10), wherein a permanent magnet assembly (20) is arranged in the middle of the inside of the shell (10), and a first auxiliary stator core assembly (31) is arranged in the shell (10) and positioned on a first side of the permanent magnet assembly (20);

a second stator assembly (40), the second stator assembly (40) disposed within the housing (10) and on a second side of the permanent magnet assembly (20), the second stator assembly (40) disposed opposite the first stator assembly (30);

the rotor assembly (50) comprises a rotating shaft (51), an auxiliary rotor (52), a first conical rotor (53) and a second conical rotor (54), the rotating shaft (51) sequentially penetrates through the first conical rotor (53), the auxiliary rotor (52) and the second conical rotor (54) to be arranged inside, the auxiliary rotor (52) is arranged in a manner of being matched with the permanent magnet assembly (20), the first stator assembly (30) and the second stator assembly (40), the first conical rotor (53) is arranged in a manner of being matched with part of the first stator assembly (30), and the second conical rotor (54) is arranged in a manner of being matched with part of the second stator assembly (40);

the first stator assembly (30) and the second stator assembly (40) are used for generating independent control magnetic fields, the permanent magnet assembly (20) generates a bias magnetic field, the control magnetic field controls the rotating shaft (51) to do translational motion along a Y axis or rotate around the Y axis by adjusting the bias magnetic field, or controls the rotating shaft (51) to rotate around an X axis or do translational motion along the X axis, or controls the rotating shaft (51) to do translational motion along a Z axis, the X axis and the Y axis are along the radial direction of the rotating shaft (51), and the Z axis is the axial direction of the rotating shaft (51).

11. The magnetic bearing assembly of claim 1, wherein the first main windings are independently controlled and the first auxiliary windings are arranged in series.

12. An electrical machine comprising a magnetic bearing assembly, characterized in that the magnetic bearing assembly is a magnetic bearing assembly according to any of claims 1 to 11.

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