A magnetically suspended axial flux double-salient pole permanent magnet motor

Abstract

The present invention discloses a magnetic suspension axial flux double-salient pole permanent magnet motor, comprising: a carrier, comprising a sleeve and a disk arranged at both ends of the sleeve, and the two form an accommodating space; a suspension component, connected to the inner wall of the sleeve; and a rotating component, arranged in the accommodating space; the rotating component comprises a stator body, a rotor body arranged inside the stator body, and a rotating shaft located inside the rotor body; wherein the two ends of the rotating shaft pass through the through holes of the disk. The present invention adopts a permanent magnet to generate a bias magnetic field, and adopts an electromagnet to provide a control magnetic field, and the control magnetic field interacts with the excitation magnetic field to generate a controllable radial suspension force, and the radial suspension force is used to put the rotating shaft in a contactless state, thereby eliminating the friction loss caused by mechanical contact when the rotating shaft rotates, and realizing stable suspension in two radial degrees of freedom.

Description

Technical Field

[0001] The present invention relates to the field of motor technology, and in particular to a magnetic suspension axial flux double-salient pole permanent magnet motor. Background Art

[0002] Using magnetic force to make an object levitate without contact is an ancient dream of mankind. In 1842, Professor S. Earnshaw of Cambridge University in the United Kingdom theoretically proved that permanent magnets alone cannot keep an object levitated stably in all six degrees of freedom in space. In order to make the force obtained by ferromagnets be used for stable free suspension, the magnetic field must be continuously adjusted according to the suspension state of the object, that is, a controllable electromagnet must be used. In 1937, German Kemper successfully used a controllable electromagnet to stably suspend an object with a mass of 210 kg and obtained a patent for magnetic levitation technology. This experimental device is the predecessor of the magnetic levitation train that appeared later. Subsequently, magnetic levitation technology has attracted the attention of scholars at home and abroad and has developed rapidly.

[0003] Magnetic bearing (abbreviated as magnetic bearing) is a new type of high-performance bearing that uses magnetic force to suspend the rotor in space, so that there is no mechanical contact between the rotor and the stator. Since there is no friction between the stator and the rotor, the rotor speed is only limited by the strength of the material. The rotor of the magnetic bearing can reach a very high operating speed, and the operating status of the rotor can be detected and controlled in real time by the control system. It has the advantages of low loss, no need for lubrication medium, long life, low noise, and no pollution. It has broad application prospects in high-tech fields such as energy, transportation, ultra-high speed and ultra-precision machining, aerospace, and robotics.

[0004] Magnetic bearings can be divided into the following three categories according to the way the magnetic force is provided:

[0005] (1) Active magnetic bearing, also known as active magnetic bearing

[0006] Active magnetic bearings (AMBs) are characterized by controllable magnetic fields. They generate time-varying magnetic fields by controlling the current in the electromagnet coils. The time-varying magnetic fields are used to adjust the suspension force required by the bearings to ensure that the rotor system is stably suspended at the target position. Active magnetic bearings have high stiffness, can be precisely controlled, and have strong anti-interference capabilities, but they are relatively large in size, weight, and power consumption.

[0007] (2) Passive magnetic bearings, also known as passive magnetic bearings (PMB), use the characteristics of permanent magnets or superconductors to achieve stable suspension of some of the rotor's degrees of freedom. The magnetic field of passive magnetic bearings is uncontrollable. Since there is no control current, power consumption is reduced and the volume is smaller. However, this type of magnetic bearing lacks active control capabilities and has relatively low stiffness and damping. It is generally only used to support objects in one direction or to reduce the load on traditional bearings.

[0008] (3) Hybrid Magnetic Bearing (HMB) combines the advantages of both. It uses permanent magnets to replace the electromagnets in active magnetic bearings to generate a bias magnetic field. The electromagnet only provides a control magnetic field to balance the load or interference, which greatly reduces the power loss caused by the bias current. The ampere-turns required by the electromagnet are much lower than those of active magnetic bearings, which reduces the size of the magnetic bearings, reduces its weight, and improves its load-bearing capacity.

[0009] The doubly salient permanent magnet motor is developed from the switched reluctance motor. It not only has the high power density and high efficiency characteristics of the traditional permanent magnet motor, but also inherits the rotor structure of the switched reluctance motor, that is, the rotor has no windings and no permanent magnets, thus avoiding the irreversible demagnetization phenomenon caused by the shedding of magnetic steel and the heating of the rotor when the motor runs at high speed. In the process of controlling the rotation of the shaft, ordinary doubly salient permanent magnet motors will produce friction losses due to the inevitable mechanical contact, which greatly reduces the life of the bearings and increases the maintenance workload. Summary of the invention

[0010] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0011] The present invention is proposed in view of the technical problem that in the process of controlling the rotation of the rotating shaft of the existing ordinary double-salient pole permanent magnet motor, friction loss is generated due to inevitable mechanical contact, which greatly reduces the life of the bearing and increases the maintenance workload.

[0012] Therefore, an object of the present invention is to provide a magnetically suspended axial flux double-salient pole permanent magnet motor.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions.

[0014] As a preferred solution of the magnetic suspension axial flux double-salient pole permanent magnet motor of the present invention, wherein: a magnetic suspension axial flux double-salient pole permanent magnet motor comprises:

[0015] The carrier includes a sleeve and discs disposed at both ends of the sleeve, and the two constitute a containing space;

[0016] a suspension assembly connected to the inner wall of the sleeve; and

[0017] The rotating assembly is arranged in the accommodating space.

[0018] As a preferred solution of the magnetic suspension axial flux double-salient pole permanent magnet motor of the present invention, wherein: the rotating assembly comprises a stator body, a rotor body arranged inside the stator body, and a rotating shaft located inside the rotor body;

[0019] Wherein, two ends of the rotating shaft pass through the through holes of the disc.

[0020] As a preferred solution of the magnetic suspension axial flux double salient pole permanent magnet motor of the present invention, wherein: the motor stator salient poles of the stator body are evenly distributed on the inner side of the disc and along the edge of the through hole;

[0021] Wherein, the stator body further includes an armature winding, and the armature winding is wound around the periphery of the salient pole of the motor stator.

[0022] As a preferred solution of the magnetic suspension axial flux double salient pole permanent magnet motor of the present invention, wherein: the rotor body comprises a rotor disk and a motor rotor salient pole, and the motor rotor salient pole is arranged on the rotor disk;

[0023] Wherein, the rotor disk is arranged on the periphery of the rotating shaft.

[0024] As a preferred solution of the magnetic suspension axial flux double salient pole permanent magnet motor of the present invention, a gap is provided between the salient poles of the motor rotor and the salient poles of the motor stator;

[0025] Wherein, the gap range is 0.5mm-1mm.

[0026] As a preferred solution of the magnetically suspended axial flux double-salient pole permanent magnet motor described in the present invention, the motor rotor has at least three salient poles, the motor stator has at least two salient poles, and the number of both salient poles meets the matching standard of the number of stator poles and rotor poles of the double-salient pole motor.

[0027] As a preferred solution of the magnetic suspension axial flux double salient pole permanent magnet motor of the present invention, wherein: the suspension assembly includes a rotor disk, a magnetic bearing stator salient pole, a magnetic axis control winding, a magnetic bearing stator yoke and a permanent magnet, the permanent magnet is arranged between the sleeve and the magnetic bearing stator yoke, the magnetic bearing stator salient pole is arranged in the magnetic bearing stator yoke, and the magnetic axis control winding is wound on the outside of the magnetic bearing stator salient pole;

[0028] The magnetic bearing stator yoke is arranged on the inner wall of the sleeve.

[0029] As a preferred solution of the magnetic suspension axial flux double salient pole permanent magnet motor of the present invention, wherein: a gap is provided between the stator salient pole of the magnetic bearing and the rotor disk;

[0030] Wherein, the gap range is 0.4mm-1mm.

[0031] As a preferred solution of the magnetic suspension axial flux double salient pole permanent magnet motor of the present invention, wherein: the magnetic bearing stator salient poles are at least three, and the three magnetic bearing stator salient poles are evenly arranged on the inner wall of the magnetic bearing stator yoke;

[0032] Wherein, the number of the magnetic axis control windings is the same as the number of salient poles of the magnetic bearing stator;

[0033] The thickness of the permanent magnet is the same as the thickness of the magnetic bearing stator yoke.

[0034] Beneficial effects of the present invention: The present invention uses permanent magnets to generate a bias magnetic field and electromagnets to provide a control magnetic field. The control magnetic field interacts with the excitation magnetic field to generate a controllable radial suspension force. The radial suspension force is used to put the rotating shaft in a contactless state, eliminating the friction loss caused by mechanical contact when the rotating shaft rotates, and realizing stable suspension in two radial degrees of freedom. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0036] in: Figure 1 It is a schematic diagram of the overall structure of the magnetically suspended axial flux double-salient pole permanent magnet motor of the present invention.

[0037] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the magnetically suspended axial flux double-salient pole permanent magnet motor of the present invention.

[0038] Figure 3 This is a schematic diagram of the rotor body and shaft structure of the magnetic suspension axial flux double-salient pole permanent magnet motor of the present invention (taking the structure in which the rotors on both sides of the rotor disk of the rotating assembly adopt four poles as an example).

[0039] Figure 4 It is a schematic diagram of the excitation magnetic field of the magnetic suspension axial flux double-salient pole permanent magnet motor of the present invention.

[0040] Figure 5 Schematic diagram of the control magnetic field of the magnetic suspension axial flux double-salient pole permanent magnet motor of the present invention (taking the magnetic bearing stator of the suspension component adopting a four-pole structure and current flowing in the vertical direction as an example). DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0044] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0045] Example 1

[0046] Reference Figure 1 and Figure 2 , provides a schematic diagram of the overall structure of a magnetically suspended axial flux double-salient pole permanent magnet motor, such as Figure 1 A magnetically suspended axial flux double-salient pole permanent magnet motor includes a carrier 100, including a sleeve 101 and disks 102 arranged at both ends of the sleeve 101, and the two constitute an accommodating space N1; a suspension component 200, connected to the inner wall of the sleeve 101; and a rotating component 300, arranged in the accommodating space N1.

[0047] Specifically, the main structure of the present invention includes a carrier 100, a suspension component 200 and a rotating component 300. By cooperating with each other, the radial suspension force can be used to put the rotating shaft in a non-contact state, thereby eliminating the friction loss caused by mechanical contact when the rotating shaft rotates, and realizing stable suspension in two radial degrees of freedom. The carrier 100 plays a role in protecting and carrying the suspension component 200 and the rotating component 300, and includes a sleeve 101 and a disc 102 arranged at both ends of the sleeve 101, and the two constitute an accommodating space N1, and the accommodating space N1 Space is provided for assembling the suspension component 200 and the rotating component 300; the suspension component 200 provides a guarantee for achieving radial suspension and is connected to the inner wall of the sleeve 101; and the rotating component 300 provides conditions for suspension and motor transmission and is arranged in the accommodating space N1. It should be noted that the suspension component 200 and the rotating component 300 use permanent magnets to generate a bias magnetic field and electromagnets to provide a control magnetic field. The control magnetic field interacts with the excitation magnetic field to generate a controllable radial suspension force, so that the rotating shaft is in a contactless state, eliminating the friction loss caused by mechanical contact when the rotating shaft rotates, and realizing stable suspension in two radial degrees of freedom.

[0048] Furthermore, the sleeve 101 is in the shape of a hollow cylinder, and the disk 102 is a circular structure with a through hole at the center. In this embodiment, there are two disks 102, which are symmetrically arranged at both ends of the sleeve 101. It should be noted that a through hole 102a is provided on the disk 102, and the through hole 102a is used for the motor shaft to extend.

[0049] Example 2

[0050] Reference Figure 2 , this embodiment is different from the first embodiment in that: the rotating assembly 300 includes a stator body 301, a rotor body 302 disposed inside the stator body 301, and a rotating shaft 303 located inside the rotor body 302, and the stator body 301, the rotor body 302, and the rotating shaft 303 cooperate with each other to form an axial flux double salient pole motor. Specifically, the rotating assembly 300 includes a stator body 301, a rotor body 302 disposed inside the stator body 301, and a rotating shaft 303 located inside the rotor body 302; wherein both ends of the rotating shaft 303 pass through the through hole 102a of the disc 102.

[0051] Furthermore, the motor stator salient pole 301a of the stator body 301 is fixedly connected to the disc 102; wherein, the stator body 301 also includes an armature winding 301b, which is wound around the periphery of the motor stator salient pole 301a. Specifically, a plurality of motor stator salient poles 301a are arranged at the edge near the inner through hole 102a of the disc 102.

[0052] Further, such as Figure 3 As shown, the rotor body 302 includes a rotor disk 302a and a motor rotor salient pole 302b, and the rotor disk 302a and the motor rotor salient pole 302b constitute the rotor part of the motor. The motor rotor salient pole 302b is arranged on both sides of the rotor disk, evenly distributed along the edge, and multiple motor rotor salient poles are arranged on each side. Specifically, the symmetrical side of the rotor disk 302a protrudes along the direction parallel to the axis of the rotating shaft 303 and fixes the motor rotor salient pole 302b. It should be noted that the motor rotor salient pole and the motor stator salient pole are both arranged in multiples, and the motor rotor salient pole is at least 3. , at least two motor stator salient poles are arranged, and the number of the two is arranged in accordance with the matching standard of the number of stator poles and the number of rotor poles of the double salient pole motor, two pairs of motor stator salient poles 301a and motor rotor salient poles 302b are evenly arranged on the rotor disk 302a and the two disks 102 respectively, and the rotor disk 302a is fixedly arranged on the periphery of the rotating shaft 303. It should be noted that the rotor disk 302a is cylindrical, and the number of motor rotor salient poles 302b and motor stator salient poles 301a are arranged in accordance with the matching standard of the number of stator poles and the number of rotor poles of the double salient pole motor.

[0053] It should be noted that a gap is provided between the motor rotor salient pole 302b and the motor stator salient pole 301a, and the gap is an axial gap, wherein the axial gap ranges from 0.5mm to 1mm.

[0054] Example 3

[0055] Reference Figure 2 , this embodiment is different from the above embodiments in that: the suspension component 200 includes a rotor disk 302a, a magnetic bearing stator salient pole 201, a magnetic axis control winding 202, a magnetic bearing stator yoke 203, a permanent magnet 204 and a rotor disk 302a. The magnetic bearing stator salient pole 201, the magnetic axis control winding 202, the magnetic bearing stator yoke 203 and the permanent magnet 204 provided on the rotor disk 302a can cooperate with the rotor disk 302a to enable the rotating component 300 to be suspended in the radial direction, so that the rotating shaft 303 is in a non-contact state, eliminating the friction loss caused by mechanical contact when the rotating shaft 303 rotates, and realizing stable suspension in two radial degrees of freedom.

[0056] Specifically, the suspension component 200 includes a magnetic bearing stator salient pole 201, a magnetic axis control winding 202, a magnetic bearing stator yoke 203 and a permanent magnet 204, wherein the permanent magnet 204 is arranged between the sleeve 101 and the magnetic bearing stator yoke 203, wherein the permanent magnet 204 is an annular structure, and the magnetic bearing stator yoke 203 is cylindrical, that is, the inner and outer annular surfaces of the permanent magnet 204 are in contact with the inner wall of the sleeve 101 and the outer wall of the magnetic bearing stator yoke 203 respectively, and the magnetic bearing stator salient pole 201 is fixedly arranged on the inner wall of the magnetic bearing stator yoke 203, and the magnetic axis control winding 202 is wound around the periphery of the magnetic bearing stator salient pole 201; the magnetic bearing stator yoke 203 is arranged in the sleeve 101, wherein the magnetic bearing stator yoke 203, the magnetic bearing stator salient pole 201, the magnetic axis control winding 202 and the rotor disk 302a together constitute an electromagnet.

[0057] Furthermore, a gap is provided between the magnetic bearing stator salient pole 201 and the rotor disk 302a, and the gap is a radial gap, wherein the radial gap ranges from 0.4 mm to 1 mm.

[0058] Furthermore, there are at least three magnetic bearing stator salient poles 201 , and the three magnetic bearing stator salient poles 201 are evenly arranged on the inner wall of the magnetic bearing stator yoke 203 ; wherein the number of the magnetic axis control winding 202 is the same as the number of the magnetic bearing stator salient poles 201 .

[0059] Preferably, the thickness of the permanent magnet 204 is the same as the thickness of the magnetic bearing stator salient pole 201. It should be noted that the magnetization direction of the permanent magnet 204 is radial.

[0060] Principle description: The double-pole motor is a type of reluctance motor. The motor rotor salient pole 302b and the motor stator salient pole 301a are both salient pole tooth slot structures. The annular permanent magnet 204 generates an excitation magnetic field. When current is passed through the magnetic axis control winding 202, a control magnetic field is generated. When current is passed through the armature winding 301b, an armature magnetic field is generated. When the double-pole motor operates as a motor, the armature magnetic field and the excitation magnetic field interact to generate torque; when it operates as a generator, when the rotor rotates, the flux period of the motor stator salient pole changes, and a coil is wound around the motor stator salient pole, which will induce an electric potential on the coil. The control magnetic field and the excitation magnetic field interact to generate a controllable axial suspension force.

[0061] In the double-salient-pole permanent magnet motor of this embodiment, after current is passed through the magnetic bearing control winding, a magnetic circuit is formed through the magnetic bearing stator salient poles, the magnetic bearing stator yoke and the rotor disk, and a control magnetic field is established in the air gap between the magnetic bearing stator salient poles and the rotor disk. Its basic working principle (taking the magnetic bearing stator adopting a four-pole structure and current passing in the vertical direction as an example) is: when the rotor disk is located in the middle position in the radial direction, due to the symmetry of the structure, the bias magnetic flux generated by the annular permanent magnet is equal in the air gap above and below the rotor disk, and the upper and lower suction forces are equal at this time; if the rotor disk is subjected to a downward external disturbance force at this time, the rotor disk will deviate from the equilibrium position and move downward, causing the magnetic flux of the bias magnetic field in the upper and lower air gaps generated by the annular permanent magnet to change, that is, the upper air gap increases, and the magnetic flux of the bias magnetic field in the air gap decreases; the lower air gap decreases, and the magnetic flux of the bias magnetic field in the air gap increases; because when the magnetic pole area is constant, the magnetic field suction force is proportional to the square of the magnetic field flux is proportional to, so the upward suction is smaller than the downward suction; before the current is passed through the control winding, the rotor disk cannot return to the equilibrium position; at this time, the displacement sensor detects the displacement of the shaft from its reference position, and the controller converts this displacement signal into a control signal, and the power amplifier converts this control signal into a control current. This current flows through the control winding to establish a control magnetic field in the iron core and the radial air gap. The control magnetic field and the bias magnetic field in the radial air gap are superimposed, so that the magnetic flux of the magnetic field in the radial air gap above the rotor disk increases and the magnetic flux of the magnetic field in the radial air gap below decreases, thereby generating an upward suction force to pull the rotor disk back to the equilibrium position; similarly, no matter whether the rotor disk is subjected to external disturbances upward, downward, left or right, the permanent magnet biased radial magnetic suspension bearing with position negative feedback controls the current in the winding through the controller, adjusts the size of the magnetic flux of each radial air gap, and can always keep the rotor disk in the equilibrium position, thereby realizing stable suspension of the rotor.

[0062] The magnetic levitation axial flux double-salient pole permanent magnet motor combines the characteristics of magnetic bearings and double-salient pole motors. It not only takes advantage of the magnetic levitation bearings such as no mechanical wear and long life, but also achieves the purpose of low energy consumption and high efficiency of double-salient pole motors.

[0063] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0064] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0065] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A magnetically suspended axial flux double-salient pole permanent magnet motor, characterized in that: include, The carrier (100) comprises a sleeve (101) and discs (102) arranged at two ends of the sleeve (101), and the two constitute a containing space (N1); A suspension assembly (200) connected to the inner wall of the sleeve (101); as well as, A rotating assembly (300) is disposed in the accommodating space (N1); The suspension assembly (200) comprises a rotor disk (302a), a magnetic bearing stator salient pole (201), a magnetic axis control winding (202), a magnetic bearing stator yoke (203) and a permanent magnet (204); the permanent magnet (204) is arranged between the sleeve (101) and the magnetic bearing stator yoke (203); the magnetic bearing stator salient pole (201) is arranged inside the magnetic bearing stator yoke (203); and the magnetic axis control winding (202) is wound around the outside of the magnetic bearing stator salient pole (201); The magnetic bearing stator yoke (203) is arranged on the inner wall of the sleeve (101); A gap is provided between the magnetic bearing stator salient pole (201) and the rotor disk (302a); Wherein, the gap range is 0.4mm-1mm; At least three magnetic bearing stator salient poles (201) are provided, and the three magnetic bearing stator salient poles (201) are evenly arranged on the inner wall of the magnetic bearing stator yoke (203); The number of the magnetic axis control windings (202) is the same as the number of the magnetic bearing stator salient poles (201); The thickness of the permanent magnet (204) is the same as the thickness of the magnetic bearing stator yoke (203); The magnetic axis control winding (202) has position negative feedback, and the current in the magnetic axis control winding (202) is controlled by a controller to adjust the gap range.

2. The magnetically suspended axial flux double-salient pole permanent magnet motor according to claim 1, characterized in that: The rotating assembly (300) comprises a stator body (301), a rotor body (302) arranged inside the stator body (301), and a rotating shaft (303) located inside the rotor body (302); Wherein, both ends of the rotating shaft (303) pass through the through holes (102a) of the disc (102).

3. The magnetically suspended axial flux double-salient pole permanent magnet motor according to claim 2, characterized in that: The motor stator salient poles (301a) of the stator body (301) and the inner side of the disc (102), and are evenly distributed along the edge of the through hole (102a); Wherein, the stator body (301) further comprises an armature winding (301b), and the armature winding (301b) is wound around the periphery of the motor stator salient pole (301a).

4. The magnetically suspended axial flux double-salient pole permanent magnet motor according to claim 2 or 3, characterized in that: The rotor body (302) comprises a rotor disk (302a) and a motor rotor salient pole (302b), wherein the motor rotor salient pole (302b) is arranged on the rotor disk (302a); Wherein, the rotor disk (302a) is arranged on the periphery of the rotating shaft (303).

5. The magnetically suspended axial flux double-salient pole permanent magnet motor according to claim 4, characterized in that: A gap is provided between the motor rotor salient pole (302b) and the motor stator salient pole (301a); Wherein, the gap range is 0.5mm-1mm.

6. The magnetically suspended axial flux double-salient pole permanent magnet motor according to claim 5, characterized in that: At least three motor rotor salient poles (302b) are provided, and at least two motor stator salient poles (301a) are provided, and the number of both is set in accordance with the matching standard of the number of stator poles and the number of rotor poles of a double-salient-pole motor.

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