A radial arrangement of multiphase multi-loop homodromous annular winding radial-axial flux permanent magnet motor

Abstract

The application provides a radial arrangement of multiphase multi-loop homodromous annular winding radial-axial magnetic flux permanent magnet motor, a winding form of homodromous annular winding is adopted on the stator, the positive directions of the coil currents of the corresponding positions of the adjacent stators of the motor are opposite, and the annular middle piece iron core of the traditional multi-rotor structure motor with annular winding is removed; further, a disc type axial rotor is added outside the radial flux motor, the magnetic poles on the disc type axial rotor are opposite in the circumferential direction and opposite in the radial direction. The radial-axial magnetic flux permanent magnet motor has the advantages that the end portions of the winding can be effectively utilized while reducing the iron loss and the eddy current loss, and the output torque of the motor is provided.

Description

Technical Field

[0001] This invention relates to a permanent magnet motor, specifically, to a radially arranged multi-phase multi-ring co-directional annular winding radial axial flux permanent magnet motor. Background Technology

[0002] Electric drive technology is an important foundation for the full electrification of vehicles. The electric drive system is the core of electric vehicles. Common types of motors in electric vehicles include radial flux motors and axial flux motors.

[0003] While traditional radial flux motors have a mature structure and simple manufacturing process, their large size and weight make them unsuitable for applications with strict space and weight requirements, such as new energy vehicles and aerospace, when high power and high torque are required. Furthermore, the relatively long axial length of radial flux motors limits their application in certain compact spaces. Although they have good heat dissipation performance, their efficiency improvement potential is limited under high power density requirements, making it difficult to meet the energy-efficient requirements of modern industry.

[0004] On the other hand, while axial flux motors offer advantages such as compact structure and high power density, their complex manufacturing process and high cost hinder large-scale adoption. Furthermore, axial flux motors have relatively low structural strength, potentially leading to mechanical stability issues in high-torque or high-load applications, limiting their use in industrial drives and heavy machinery. These limitations of traditional motors make it difficult to simultaneously meet the multiple requirements of high power density, high torque density, and compact structure in high-performance applications.

[0005] With the rapid development of industrial automation, new energy vehicles, wind power generation, and other fields, the performance requirements for motors are becoming increasingly demanding. Traditional motor designs are gradually failing to meet the needs of these emerging fields. Therefore, there is an urgent need for a new type of motor design that can achieve higher power output and stronger torque performance within limited space and weight constraints.

[0006] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a radially arranged multi-phase multi-ring co-directional annular winding radial axial flux permanent magnet motor.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] The first aspect provides a radially arranged multi-phase, multi-ring, co-directional annular winding radial-axial flux permanent magnet motor, comprising:

[0010] Two annular radial rotors and at least one annular intermediate piece disposed radially between the two annular radial rotors;

[0011] The annular intermediate component includes a plurality of radial permanent magnets I distributed along the circumferential direction, each radial permanent magnet I having opposite magnetic poles to its circumferentially adjacent and radially adjacent radial permanent magnets I, respectively.

[0012] Each annular radial rotor has several radial permanent magnets II arranged along the circumferential direction on the side facing the annular intermediate part. The magnetic poles of each radial permanent magnet II are opposite to those of its circumferentially adjacent radial permanent magnet II, and also opposite to those of its radially adjacent radial permanent magnet I.

[0013] An annular stator is provided between each annular radial rotor and its adjacent annular intermediate piece, as well as between any two annular intermediate pieces. The annular stator includes a stator core and a co-directional annular winding. Three-phase electricity with opposite positive directions is applied to the co-directional annular windings on the annular stators on both sides of any annular intermediate piece.

[0014] Each annular stator has a corresponding disc-type axial rotor on one shaft end. Each disc-type axial rotor has several axial permanent magnets installed along the circumferential direction. The magnetic poles of each axial permanent magnet are opposite to those of its circumferential and radially adjacent axial permanent magnets.

[0015] In this invention, a winding configuration with co-directional annular windings is adopted. The coil currents at corresponding positions on adjacent annular stators of the motor are in opposite directions. Furthermore, the annular intermediate core of traditional multi-rotor motors with annular windings is eliminated, retaining only the magnetic poles of the annular intermediate core. After removing the core, the radial radius of the motor is significantly shortened, the weight is reduced, the torque density is higher, and iron losses and eddy current losses are reduced.

[0016] This invention adds disc-shaped axial rotors to the outside of the radial flux motor. The magnetic poles of each disc-shaped axial rotor are respectively matched with the corresponding annular stator to ensure that the force direction of the disc-shaped axial rotors is the same. The addition of disc-shaped axial rotors effectively utilizes the winding ends, fully leverages the magnetic field distribution characteristics of the annular windings, significantly improves the utilization rate of the magnetic circuit, enhances the output capability of electromagnetic torque, and achieves an effective increase in torque density.

[0017] Furthermore, any two adjacent disc-type axial rotors are fixedly connected by non-magnetic mounting brackets, each of which also fixes a disc-type intermediate component. Two annular radial rotors are fixedly connected to the two disc-type axial rotors at their radial ends via keyways or screws, and each annular stator is fixedly connected to the motor shaft via fasteners. This forms a single integrated structure from the disc-type axial rotors, radial rotors, and disc-type intermediate components. This integrated structure connects to the motor shaft via bearings, ensuring the smoothness and reliability of the rotor system during operation. The motor stator is directly connected to the motor shaft via fasteners, enhancing the stability of the motor structure. This design simplifies the assembly process and improves the maintainability of the motor.

[0018] A second aspect of the present invention provides a multiphase, multi-ring, co-directional annular winding radial flux permanent magnet motor, comprising: two annular radial rotors and at least one annular intermediate member disposed radially between the two annular radial rotors.

[0019] The annular intermediate component includes a plurality of radial permanent magnets I distributed along the circumferential direction, each radial permanent magnet I having opposite magnetic poles to its circumferentially adjacent and radially adjacent radial permanent magnets I, respectively.

[0020] Each annular radial rotor has several radial permanent magnets II arranged along the circumferential direction on the side facing the annular intermediate part. The magnetic poles of each radial permanent magnet II are opposite to those of its circumferentially adjacent radial permanent magnet II, and also opposite to those of its radially adjacent radial permanent magnet I.

[0021] An annular stator is provided between each annular radial rotor and its adjacent annular intermediate member, as well as between any two annular intermediate members. The annular stator includes a stator core and a co-directional annular winding, wherein three-phase electricity with opposite positive directions is applied to the co-directional annular winding on the annular stator on both sides of any annular intermediate member. Attached Figure Description

[0022] Figure 1 It is the overall structure of the radial-axial flux motor described in Example 1.

[0023] Figure 2 This is the second overall structure of the radial-axial flux motor described in Example 1.

[0024] Figure 3 This is a cross-sectional view of the radial-axial flux motor described in Example 1.

[0025] Figure 4 This is the radial flux distribution diagram of the radial-axial flux motor described in Example 1.

[0026] Figure 5 This is a magnetic pole distribution diagram of the annular intermediate component of the radial-axial flux motor described in Example 1.

[0027] Figure 6 This is a magnetic flux distribution diagram of the axial rotor 1 of the radial-axial flux motor described in Example 1.

[0028] Figure 7 This is a magnetic flux distribution diagram of the axial rotor 2 corresponding to the axial rotor 1 of the radial-axial flux motor described in Example 1.

[0029] In the diagram: 1. Outer annular radial rotor; 2. Inner annular radial rotor; 3. Outer annular stator; 4. Inner annular stator; 5. Annular intermediate component; 6. Disc axial rotor I; 7. Disc axial rotor II; 8. Motor shaft; 9. Radial permanent magnet I; 10. Radial permanent magnet II; 11. Axial permanent magnet; 12. Non-magnetic fixing frame; 13. Bearing; 14. Stator core; 15. Co-directional annular winding; 16. Magnetic circuit; 17. Fixing component. Detailed Implementation

[0030] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0031] Example 1

[0032] This embodiment provides a radially arranged multi-phase, multi-ring, co-directional annular winding radial-axial flux permanent magnet motor, such as... Figures 1-7 As shown, it includes:

[0033] The outer annular radial rotor 1, the inner annular radial rotor 2, and an annular intermediate piece 5 disposed between the inner annular radial rotor 2 and the outer annular radial rotor 1, and also include a disc axial rotor I 6 and a disc axial rotor II 7.

[0034] The annular intermediate component 5 includes a plurality of radial permanent magnets I 9 distributed along the circumferential direction, each radial permanent magnet I 9 having opposite magnetic poles to its circumferentially adjacent and radially adjacent radial permanent magnets I 9 respectively;

[0035] Each annular radial rotor has several radial permanent magnets II 10 arranged along the circumferential direction on the side facing the annular intermediate part 5. The magnetic poles of any two adjacent radial permanent magnets II 10 on the same circumference are opposite, and the magnetic poles of each radial permanent magnet II 10 are opposite to those of its radially adjacent radial permanent magnet I 9 located at the same circumferential position.

[0036] Specifically, both the radial permanent magnet I 9 and the radial permanent magnet II 10 are permanent magnets with N and N poles arranged radially.

[0037] Furthermore, an annular stator is provided between each annular radial rotor and its adjacent annular intermediate member 5, as well as between any two annular intermediate members 5, such as... Figure 1 and2 As shown, it includes an outer ring stator 3 and an inner ring stator 4; both the outer ring stator 3 and the inner ring stator 4 include a stator core 14 and a co-directional ring winding 15, wherein three-phase electricity with opposite positive directions is applied to the co-directional ring winding 15 on both sides of the ring stator of any one of the ring intermediate parts 5, forming an armature magnetic field with opposite rotation directions.

[0038] In practice, the three-phase currents A, B, and C in the same-direction annular winding 15 of the radial flux permanent magnet motor exhibit sinusoidal periodic changes, with a phase angle difference of 120° between them; the motor rotation direction is consistent with the magnetic field rotation direction. Figure 3 The radial magnetic field distribution of the motor is shown.

[0039] It can be seen that the radial permanent magnets I 9 with opposite magnetic poles alternately arranged on the annular intermediate member 5 form permanent magnetic fields with opposite directions, which together with the armature magnetic field form a closed loop of magnetic circuit 16. Specifically, the magnetic field passes through the annular intermediate member 5 from one annular stator and enters another annular stator, forming a large closed loop of magnetic circuit 16. Figure 5 The magnetic pole distribution diagram of the ring-shaped intermediate component 5 is shown.

[0040] It can be seen that under the influence of the armature magnetic field and the permanent magnet magnetic field, the electromagnetic forces on both sides of the annular intermediate piece 5 are in the same direction. Therefore, compared with the traditional rotor, removing the iron core of the annular intermediate piece 5 will not significantly affect the integrity of the magnetic circuit 16, while effectively shortening the axial length of the motor and reducing iron loss and eddy current loss.

[0041] Furthermore, the inner annular radial rotor 2 and the outer annular radial rotor 1 respectively form a permanent magnet magnetic field of a small magnetic circuit 16 between themselves and their opposing annular stators. The permanent magnet magnetic fields on both sides of each annular stator are in opposite directions, without distinguishing between the large magnetic circuit 16 and the small magnetic circuit 16.

[0042] Furthermore, each annular stator has a corresponding disc-type axial rotor installed on one shaft end, specifically as follows: Figure 1-2 As shown, a disc-type axial rotor I 6 is disposed on one shaft end of the outer annular stator 3, and a disc-type axial rotor II 7 is disposed on one shaft end of the inner annular stator 4. Several axial permanent magnets 11 are respectively mounted on the disc-type axial rotor I 6 and the disc-type axial rotor II 7 along the circumferential direction. The magnetic poles of each axial permanent magnet 11 are opposite to those of its circumferentially adjacent and radially adjacent axial permanent magnets 11. Specifically, the axial permanent magnets 11 are permanent magnets with their N and S poles arranged axially.

[0043] Figure 6 and Figure 7The magnetic field distributions of disc-type axial rotor I (6) and disc-type axial rotor II (7) are shown respectively. Because the current directions in the corresponding positions of the same-direction annular windings in the outer annular stator 3 and the inner annular stator 4 are opposite, the magnetic pole polarities of corresponding positions in disc-type axial rotor I (6) and disc-type axial rotor II (7) are opposite, resulting in the same direction of electromagnetic force. This design fully utilizes the magnetic field characteristics of the annular windings, achieving a radial-axial hybrid magnetic flux path, further optimizing the motor's magnetic field distribution, and significantly improving torque density and operating efficiency. The introduction of the radial rotor enables the motor to generate torque simultaneously in both the axial and radial directions, thereby improving the overall performance of the motor.

[0044] In this invention, a winding configuration of unidirectional annular windings 15 is adopted. The coil currents at corresponding positions on adjacent annular stators of the motor are in opposite directions. Furthermore, the intermediate rotor core of a traditional multi-rotor motor with annular windings is removed, retaining only the magnetic poles of the intermediate rotor. Removing the core significantly shortens the motor's radial radius, reduces weight, and increases torque density, while also reducing iron losses and eddy current losses. This design also enhances the motor's layer scalability, providing greater flexibility for the design of multi-layer radial flux motors and further improving torque density.

[0045] This invention adds a disc-shaped axial rotor to the outside of the axial flux motor. The magnetic poles of the disc-shaped axial rotor are respectively matched with the corresponding annular stators to ensure that the force direction of the disc-shaped axial rotor is the same. The addition of the disc-shaped axial rotor effectively utilizes the winding ends, fully utilizes the magnetic field distribution characteristics of the annular winding, significantly improves the utilization rate of the magnetic circuit 16, enhances the output capability of electromagnetic torque, and achieves an effective increase in torque density.

[0046] Furthermore, such as Figure 3 As shown, the cross-sectional view of the motor illustrates the arrangement of the disc-shaped axial rotor, the radial rotor, and the annular intermediate component 5. This design allows the motor to fully utilize the axial and radial magnetic field distribution during operation, forming an efficient hybrid flux path.

[0047] Furthermore, such as Figure 3As shown, the disc-shaped axial rotors located at the radial inner end are fixedly connected to the motor shaft 8 via bearings 13. Any two adjacent disc-shaped axial rotors are fixedly connected via non-magnetic mounting brackets 12, and each non-magnetic mounting bracket 12 also fixes a disc-shaped intermediate component. Two annular radial rotors are fixedly connected to the two disc-shaped axial rotors at the radial ends via keyways or screws. Each annular stator is fixedly connected to the motor shaft 8 via fasteners 17. This forms a single integrated structure from the disc-shaped axial rotors, radial rotors, and disc-shaped intermediate components. This integrated structure is connected to the motor shaft 8 via bearings 13, ensuring the smoothness and reliability of the rotor system during operation. The motor stator is directly connected to the motor shaft via fasteners 17, enhancing the stability of the motor structure. This design simplifies the assembly process and improves the maintainability of the motor.

[0048] In another embodiment, the radial permanent magnet II 10 is a permanent magnet with the N and N poles arranged radially, and the annular intermediate 5 is a radial permanent magnet I 9 formed by arranging the Helbeck array.

[0049] Example 2

[0050] The difference between this embodiment and embodiment 1 is that at least two annular intermediate parts 5 are provided between the two annular radial rotors;

[0051] The annular intermediate component 5 includes a plurality of radial permanent magnets I 9 distributed along the circumferential direction, each radial permanent magnet I 9 having opposite magnetic poles to its circumferentially adjacent and radially adjacent radial permanent magnets I 9 respectively;

[0052] Each annular radial rotor has several radial permanent magnets II 10 arranged along the circumferential direction on the side facing the annular intermediate part 5. The magnetic poles of each radial permanent magnet II 10 are opposite to those of its circumferentially adjacent radial permanent magnet II 10, and also opposite to those of its radially adjacent radial permanent magnet I 9.

[0053] An annular stator is provided between each annular radial rotor and its adjacent annular intermediate member 5, as well as between any two annular intermediate members 5. The annular stator includes a stator core 14 and a co-directional annular winding 15, wherein three-phase electricity with opposite positive directions is applied to the co-directional annular winding 15 on both sides of the annular stator of any annular intermediate member 5.

[0054] Each annular stator has a corresponding disc-type axial rotor on one shaft end. Each disc-type axial rotor has several axial permanent magnets 11 installed along the circumferential direction. The magnetic poles of each axial permanent magnet 11 are opposite to those of its circumferential and radially adjacent axial permanent magnets 11.

[0055] It is understood that the number of the disc axial rotors is the same as the number of the annular stators, so as to make full use of the winding ends on each annular stator.

[0056] Furthermore, each disc-type axial rotor is equipped with several axial permanent magnets 11 along the circumferential direction. Any two circumferentially adjacent axial permanent magnets 11 have opposite magnetic poles, and any two radially adjacent axial permanent magnets 11 located at the same circumferential position have opposite magnetic poles.

[0057] The above scheme removes the annular intermediate core 5 of the traditional multi-rotor motor with annular windings, retaining only the magnetic poles of the annular intermediate core 5, which enhances the motor's layer expansion capability, provides greater flexibility for the design of multi-layer radial flux motors, and further improves torque density.

[0058] Example 3

[0059] This embodiment provides a multiphase, multi-ring, co-directional annular winding radial flux permanent magnet motor, including: an outer annular radial rotor 1, an inner annular radial rotor 2, and an annular intermediate member 5 disposed between the outer annular radial rotor 1 and the inner annular radial rotor 2.

[0060] The annular intermediate component 5 includes a non-magnetic fixing frame 12 and a plurality of radial permanent magnets I 9 mounted on the non-magnetic fixing frame 12 along the circumferential direction. Each radial permanent magnet I 9 has a magnetic pole opposite to that of its circumferentially adjacent radial permanent magnet I 9, and also has a magnetic pole opposite to that of its radially adjacent radial permanent magnet I 9 located at the same circumferential position.

[0061] Each annular radial rotor has several radial permanent magnets II 10 arranged along the circumference on the side facing the annular intermediate part 5. The magnetic poles of any two adjacent radial permanent magnets II 10 on the same circumference are opposite.

[0062] Specifically, both the radial permanent magnet I 9 and the radial permanent magnet II 10 are permanent magnets with N and N poles arranged radially.

[0063] An annular stator is provided between each annular radial rotor and its adjacent annular intermediate member 5, as well as between any two annular intermediate members 5. The annular stator includes a stator core 14 and a co-directional annular winding 15. Three-phase electricity with opposite positive directions is applied to the co-directional annular winding 15 on both sides of the annular stator of any annular intermediate member 5, forming an armature magnetic field with opposite rotation directions.

[0064] In practice, the A, B, and C phase currents of the radial flux permanent magnet motor stator exhibit sinusoidal periodic changes, with a phase angle difference of 120° between them; the motor rotation direction is consistent with the magnetic field rotation direction. Figure 3 The radial magnetic field distribution of the motor is shown.

[0065] The radial permanent magnets I 9, with opposite magnetic poles alternately arranged on the annular intermediate member 5, form a permanent magnetic field with opposite directions, which together with the armature magnetic field forms a closed magnetic circuit 16. Specifically, the magnetic field passes through the annular intermediate member 5 from one annular stator and enters another annular stator, forming a large closed magnetic circuit 16. Figure 4 The magnetic pole distribution diagram of the annular intermediate component 5 is shown. It can be seen that under the influence of the armature magnetic field and the permanent magnet magnetic field, the electromagnetic forces acting on both sides of the annular intermediate component 5 are in the same direction. Therefore, compared with a traditional rotor, removing the iron core of the annular intermediate component 5 does not significantly affect the integrity of the magnetic circuit 16, while effectively shortening the axial length of the motor and reducing iron loss and eddy current loss.

[0066] Furthermore, the inner annular radial rotor 2 and the outer annular radial rotor 1 respectively form a permanent magnet magnetic field of a small magnetic circuit 16 between themselves and their opposing annular stators. The permanent magnet magnetic fields on both sides of each annular stator are in opposite directions, without distinguishing between the large magnetic circuit 16 and the small magnetic circuit 16.

[0067] In this invention, a winding configuration of unidirectional annular windings 15 is adopted, with the coil currents at corresponding positions on adjacent stators of the motor having opposite positive directions. Furthermore, the annular core 5, a feature of traditional multi-rotor motors with annular windings, is removed, retaining only the magnetic poles of the annular core 5. Removing the core significantly shortens the motor's radial radius, reduces weight, and increases torque density, while also reducing iron losses and eddy current losses. This design also enhances the motor's layer scalability, providing greater flexibility for the design of multi-layer radial flux motors and further improving torque density.

[0068] In another embodiment, the radial permanent magnet II 10 is a permanent magnet with the N and N poles arranged radially, and the annular intermediate 5 is a radial permanent magnet I 9 formed by arranging the Helbeck array.

[0069] Furthermore, the two disc-shaped axial rotors located at the axial ends are fixedly connected to the radial rotor via keyways or screws. The disc-shaped axial rotors are also fixedly connected to the adjacent annular intermediate piece 5 via the non-magnetic fixing bracket 12. This integral rotor structure is connected to the motor shaft via bearing 13, ensuring the smoothness and reliability of the rotor system during operation. The motor stator is directly connected to the motor shaft via fixing piece 17, enhancing the stability of the motor structure. This design simplifies the assembly process and improves the maintainability of the motor.

[0070] Example 4

[0071] The difference between this embodiment and embodiment 1 is that at least two annular intermediate pieces 5 are provided between the two annular radial rotors;

[0072] The annular intermediate component 5 includes a non-magnetic fixing frame 12 and a plurality of radial permanent magnets I 9 mounted on the non-magnetic fixing frame 12 along the circumferential direction. Each radial permanent magnet I 9 has a magnetic pole opposite to that of its circumferentially adjacent radial permanent magnet I 9, and also has a magnetic pole opposite to that of its radially adjacent radial permanent magnet I 9 located at the same circumferential position.

[0073] Each annular radial rotor has several radial permanent magnets II 10 arranged along the circumference on the side facing the annular intermediate part 5. The magnetic poles of any two adjacent radial permanent magnets II 10 on the same circumference are opposite, and the magnetic poles of each radial permanent magnet II 10 are opposite to those of its radially adjacent radial permanent magnet I 9 located at the same circumference position.

[0074] An annular stator is provided between each annular radial rotor and its adjacent annular intermediate member 5, as well as between any two annular intermediate members 5. The annular stator includes a stator core 14 and a co-directional annular winding 15, wherein three-phase electricity with opposite positive directions is applied to the co-directional annular winding 15 on both sides of the annular stator of any annular intermediate member 5.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A radially arranged multi-phase, multi-ring, co-directional annular winding radial-axial flux permanent magnet motor, characterized in that, include: Two annular radial rotors and at least one annular intermediate piece disposed radially between the two annular radial rotors; The annular intermediate component includes a plurality of radial permanent magnets I distributed along the circumferential direction, each radial permanent magnet I having opposite magnetic poles to its circumferentially adjacent and radially adjacent radial permanent magnets I, respectively. Each annular radial rotor has several radial permanent magnets II arranged along the circumferential direction on the side facing the annular intermediate part. The magnetic poles of each radial permanent magnet II are opposite to those of its circumferentially adjacent radial permanent magnet II, and also opposite to those of its radially adjacent radial permanent magnet I. An annular stator is provided between each annular radial rotor and its adjacent annular intermediate piece, as well as between any two annular intermediate pieces. The annular stator includes a stator core and a co-directional annular winding. Three-phase electricity with opposite positive directions is applied to the co-directional annular windings on the annular stators on both sides of any annular intermediate piece. Each annular stator has a corresponding disc-type axial rotor on one shaft end. Each disc-type axial rotor has several axial permanent magnets installed along the circumferential direction. The magnetic poles of each axial permanent magnet are opposite to those of its circumferential and radially adjacent axial permanent magnets.

2. The radially arranged multi-phase multi-ring co-directional annular winding radial axial flux permanent magnet motor according to claim 1, characterized in that, The disc-shaped axial rotors located at the inner radial end are fixedly connected to the motor shaft via bearings. Any two adjacent disc-shaped axial rotors are fixedly connected via non-magnetic mounting brackets. Each non-magnetic mounting bracket is also fixedly connected to a disc-shaped intermediate component. The two annular radial rotors are fixedly connected to the two disc-shaped axial rotors at the radial ends via keyways or screws. Each annular stator is fixedly connected to the motor shaft via a fastener.

3. A radially arranged multi-phase multi-ring co-directional annular winding radial-axial flux permanent magnet motor according to claim 2, characterized in that, Both radial permanent magnet I and radial permanent magnet II are permanent magnets with their N and S poles arranged radially.

4. A radially arranged multi-phase multi-ring co-directional annular winding radial-axial flux permanent magnet motor according to claim 2, characterized in that, The radial permanent magnet II is a permanent magnet with the N and N poles arranged radially, and the annular intermediate component includes several radial permanent magnets I formed by a Helbeck array.

5. A radially arranged multi-phase multi-ring co-directional annular winding radial-axial flux permanent magnet motor according to claim 1, 2, 3, or 4, characterized in that, The axial permanent magnet is a permanent magnet with its N and S poles arranged along the axial direction.

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