Radial-arranged multi-phase multi-ring homodromous annular winding radial and axial magnetic flux permanent magnet motor

Abstract

The invention provides a radially-arranged multi-phase multi-ring same-direction annular winding radial and axial magnetic flux permanent magnet motor, a winding form of a same-direction annular winding is adopted on a stator, the positive directions of coil currents at corresponding positions of adjacent stators of the motor are opposite, and an annular middleware iron core of a traditional multi-rotor structure motor with an annular winding is removed; furthermore, a disc type axial rotor is additionally arranged on the outer side of the radial flux motor, and magnetic poles on the disc type axial rotor are opposite in circumferential direction and radial direction. The radial and axial magnetic flux permanent magnet motor has the advantages that iron loss and eddy-current loss are reduced, the winding end part can be effectively utilized, and the output torque of the motor is provided.

Description

Technical Field

[0001] The present invention relates to a permanent magnet motor, and specifically, to a multi-phase multi-ring co-directional annular winding radial-axial flux permanent magnet motor with a radial arrangement. Background Art

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

[0003] Although traditional radial flux motors have a mature structure and simple manufacturing process, under high power and high torque requirements, their volume and weight are relatively large, making it difficult to meet application scenarios with strict space and weight requirements, such as new energy vehicles and the aerospace field. In addition, the axial length of radial flux motors is relatively long, resulting in limited application in some compact spaces. Although their heat dissipation performance is good, under high power density requirements, the room for efficiency improvement is limited, making it difficult to meet the requirements of modern industry for high efficiency and energy conservation.

[0004] On the other hand, although axial flux motors have the advantages of a compact structure and high power density, their manufacturing process is complex and the cost is high, making it difficult to promote on a large scale. In addition, the structural strength of axial flux motors is relatively low, and mechanical stability problems may occur in high torque or high load applications, restricting their application in industrial drives and heavy machinery. These limitations of traditional motors make it difficult to balance multiple requirements such as high power density, high torque density, and compact structure in high-performance application scenarios.

[0005] With the rapid development of fields such as industrial automation, new energy vehicles, and wind power generation, the performance requirements for motors are getting higher and higher, and traditional motor designs are gradually unable 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 under limited space and weight constraints.

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

[0007] The purpose of the present invention is to address the deficiencies of the prior art, and thus provide a multi-phase multi-ring co-directional annular winding radial-axial flux permanent magnet motor with a radial arrangement.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is as follows: In a first aspect, there is provided a multi-phase multi-ring co-directional annular winding radial-axial flux permanent magnet motor with a radial arrangement, including: Two annular radial rotors and at least one annular intermediate member disposed at intervals in the radial direction between the two annular radial rotors; The annular middle piece includes a plurality of radial permanent magnets I distributed along the circumferential direction, and the magnetic poles of each radial permanent magnet I are opposite to those of the circumferentially adjacent and radially adjacent radial permanent magnets I respectively; On one side of each annular radial rotor facing the annular middle piece, a plurality of radial permanent magnets II are arranged along the circumferential direction. The magnetic poles of each radial permanent magnet II are opposite to those of the circumferentially adjacent radial permanent magnets II, and are opposite to those of the radially adjacent radial permanent magnets I; An annular stator is arranged between each annular radial rotor and the adjacent annular middle piece and between any two annular middle 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 one annular middle piece; A disc-shaped axial rotor is correspondingly arranged on one shaft end side of each annular stator. A plurality of axial permanent magnets are installed on each disc-shaped axial rotor along the circumferential direction. The magnetic poles of each axial permanent magnet are opposite to those of the circumferentially adjacent and radially adjacent axial permanent magnets respectively.

[0009] In the present invention, the winding form of the co-directional annular winding is adopted. The positive directions of the coil currents at the corresponding positions of the adjacent annular stators of the motor are opposite, and the iron core of the annular middle piece of the traditional multi-rotor structure motor with an annular winding is removed, and only the magnetic poles of the annular middle piece are retained. After removing the iron core, the radial radius of the motor is significantly shortened, the weight is reduced, the torque density is higher, and at the same time, the iron loss and eddy current loss are reduced.

[0010] In the present invention, a disc-shaped axial rotor is added outside the radial flux motor. The magnetic poles of each disc-shaped axial rotor are respectively adapted to the corresponding annular stator to ensure that the force directions of the disc-shaped axial rotors are the same. The addition of the disc-shaped axial rotor effectively utilizes the winding ends, makes full use of the magnetic field distribution characteristics of the annular winding, significantly improves the utilization rate of the magnetic circuit, enhances the output ability of the electromagnetic torque, and realizes the effective improvement of the torque density.

[0011] Furthermore, any two adjacent disc-shaped axial rotors are fixedly connected through a non-magnetic fixing frame, and each non-magnetic fixing frame is also fixedly connected to a disc-shaped middle piece; the two annular radial rotors are respectively fixedly connected to the two disc-shaped axial rotors at the radial two ends through key grooves or screws, and each annular stator is fixedly connected to the motor shaft through a fixing member; thus, the disc-shaped axial rotor, the radial rotor and the disc-shaped middle piece form an integral structure. This integral structure is connected to the motor shaft through bearings to ensure the stability and reliability of the rotor system during operation. The stator of the motor is directly connected to the motor shaft through a fixing member, enhancing the stability of the motor structure. This design simplifies the assembly process and improves the maintainability of the motor.

[0012] The second aspect of the present invention provides a polyphase multi-loop co-rotating annular winding radial flux permanent magnet motor, comprising: two annular radial rotors and at least one annular intermediate member disposed at intervals in the radial direction between the two annular radial rotors; The annular intermediate member includes a plurality of radial permanent magnets I distributed in the circumferential direction, and the magnetic poles of each radial permanent magnet I are opposite to those of the circumferentially adjacent and radially adjacent radial permanent magnets I; On one side of each annular radial rotor facing the annular intermediate member, a plurality of radial permanent magnets II are arranged in the circumferential direction. The magnetic poles of each radial permanent magnet II are opposite to those of the circumferentially adjacent radial permanent magnets II, and are opposite to those of the radially adjacent radial permanent magnets I; An annular stator is provided between each annular radial rotor and the adjacent annular intermediate member and between any two annular intermediate members. The annular stator includes a stator core and a co-rotating annular winding, and three-phase electricity with opposite positive directions is applied to the co-rotating annular windings on the annular stators on both sides of any one annular intermediate member. Description of the Drawings

[0013] Figure 1 is the overall structure one of the radial-axial flux motor described in Embodiment 1.

[0014] Figure 2 is the overall structure two of the radial-axial flux motor described in Embodiment 1.

[0015] Figure 3 is the sectional view of the radial-axial flux motor described in Embodiment 1.

[0016] Figure 4 is the radial flux distribution diagram of the radial-axial flux motor described in Embodiment 1.

[0017] Figure 5 is the magnetic pole distribution diagram of the annular intermediate member of the radial-axial flux motor described in Embodiment 1.

[0018] Figure 6 is the flux distribution diagram of the axial rotor 1 of the radial-axial flux motor described in Embodiment 1.

[0019] Figure 7 is the flux distribution diagram of the axial rotor 2 corresponding to the axial rotor 1 of the radial-axial flux motor described in Embodiment 1.

[0020] In the figure: 1. Outer ring radial rotor; 2. Inner ring radial rotor; 3. Outer ring stator; 4. Inner ring stator; 5. Ring-shaped intermediate member; 6. Disc-type axial rotor I; 7. Disc-type axial rotor II; 8. Motor shaft; 9. Radial permanent magnet I; 10. Radial permanent magnet II; 11. Axial permanent magnet; 12. Non-magnetic fixing bracket; 13. Bearing; 14. Stator core; 15. Co-directional ring winding; 16. Magnetic circuit; 17. Fixing member. Specific embodiments

[0021] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0022] Embodiment 1 This embodiment provides a multi-phase multi-ring co-directional ring winding radial-axial flux permanent magnet motor with a radial arrangement, as Figures 1-7 shown, including: An outer ring radial rotor 1, an inner ring radial rotor 2, and a ring-shaped intermediate member 5 disposed between the inner ring radial rotor 2 and the outer ring radial rotor 1. Additionally, a disc-type axial rotor I 6 and a disc-type axial rotor II 7 are also included.

[0023] The ring-shaped intermediate member 5 includes a plurality of radial permanent magnets I 9 distributed along the circumferential direction. Each radial permanent magnet I 9 has opposite magnetic poles to the circumferentially adjacent and radially adjacent radial permanent magnets I 9. On one side of each ring radial rotor facing the ring-shaped intermediate member 5, a plurality of radial permanent magnets II 10 are arranged along the circumferential direction. Any two adjacent radial permanent magnets II 10 on the same circumference have opposite magnetic poles, and each radial permanent magnet II 10 has opposite magnetic poles to the radially adjacent radial permanent magnet I 9 at the same circumferential position.

[0024] Specifically, both the radial permanent magnet I 9 and the radial permanent magnet II 10 are permanent magnets with NS poles arranged radially.

[0025] Furthermore, a ring stator is provided between each ring radial rotor and the adjacent ring-shaped intermediate member 5 and between any two ring-shaped intermediate members 5, as Figure 1 and 2 shown, including 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. Three-phase electricity with opposite positive directions is applied to the co-directional ring windings 15 on the ring stators on both sides of any one ring-shaped intermediate member 5, forming armature magnetic fields with opposite rotation directions.

[0026] During specific implementation, the A, B, and C phase currents in the co-directional annular winding 15 of the radial flux permanent magnet motor change sinusoidally and periodically, and the phase angles are mutually different by 120°; the motor rotation direction is consistent with the magnetic field rotation direction. Figure 3 Shows the radial magnetic field distribution of the motor.

[0027] It can be seen that the radially magnetized permanent magnets I 9 with opposite magnetic poles alternately arranged on the annular intermediate member 5 form permanent magnetic fields in opposite directions, which together with the armature magnetic field form a closed magnetic circuit 16. Specifically, the magnetic field will pass through the annular intermediate member 5 from one annular stator and enter the other annular stator, forming a large-circulation closed magnetic circuit 16. Figure 5 Shows the magnetic pole distribution diagram of the annular intermediate member 5.

[0028] It can be seen that under the action of the armature magnetic field and the permanent magnetic field, the electromagnetic force directions on both sides of the annular intermediate member 5 are the same at this time. Therefore, compared with the traditional rotor, removing the iron core of the annular intermediate member 5 will not significantly affect the integrity of the magnetic circuit 16, while effectively shortening the axial length of the motor and reducing the iron loss and eddy current loss.

[0029] Furthermore, permanent magnetic fields of the small magnetic circuit 16 are respectively formed between the inner annular radial rotor 2 and the outer annular radial rotor 1 and their opposite annular stators. Among them, the permanent magnetic field directions on both sides of each annular stator are opposite, without distinguishing between the large magnetic circuit 16 and the small magnetic circuit 16.

[0030] Furthermore, a disk-type axial rotor is correspondingly arranged on one shaft end side of each annular stator, specifically as Figures 1-2 shown, a disk-type axial rotor I 6 is arranged on one shaft end side of the outer annular stator 3, and a disk-type axial rotor II 7 is arranged on one shaft end side of the inner annular stator 4. A plurality of axial permanent magnets 11 are respectively installed on the disk-type axial rotor I 6 and the disk-type axial rotor II 7 along the circumferential direction, and the magnetic poles of each axial permanent magnet 11 are opposite to the magnetic poles of the axially adjacent and radially adjacent axial permanent magnets 11. Specifically, the axial permanent magnet 11 is a permanent magnet with NS poles arranged along the axis.

[0031] Figure 6 and Figure 7Shows the magnetic field distributions of the motor disk axial rotor I 6 and the disk axial rotor II 7 respectively. Since the current directions in the co-directional toroidal windings at the corresponding positions of the outer toroidal stator 3 and the inner toroidal stator 4 are opposite, the magnetic pole polarities at the corresponding positions of the disk axial rotor I 6 and the disk axial rotor II 7 are opposite, so the directions of the electromagnetic forces received are the same. This design makes full use of the magnetic field characteristics of the toroidal windings, realizes a radial-axial hybrid magnetic flux path, further optimizes the magnetic field distribution of the motor, and significantly improves the torque density and operating efficiency. The introduction of the radial rotor enables the motor to generate torque simultaneously in the axial and radial directions, thus improving the overall performance of the motor.

[0032] In the present invention, the winding form of the co-directional toroidal winding 15 is adopted, the positive directions of the coil currents at the corresponding positions of the adjacent toroidal stators of the motor are opposite, and the middle rotor core of the traditional multi-rotor structure motor with toroidal windings is removed, only the magnetic poles of the middle rotor are retained. After removing the core, the radial radius of the motor is significantly shortened, the weight is reduced, the torque density is higher, and at the same time, the iron loss and eddy current loss are reduced. This design also enhances the layer scalability of the motor, provides higher flexibility for the design of the multi-layer radial flux motor, and further improves the torque density.

[0033] In the present invention, a disk axial rotor is added outside the axial flux motor, and the magnetic poles of the disk axial rotor are respectively adapted to the corresponding toroidal stators to ensure that the directions of the forces received by the disk axial rotor are the same. The addition of the disk axial rotor effectively utilizes the winding ends, makes full use of the magnetic field distribution characteristics of the toroidal windings, significantly improves the utilization rate of the magnetic circuit 16, enhances the output ability of the electromagnetic torque, and realizes an effective improvement in the torque density.

[0034] Further, as Figure 3 shown, the cross-sectional view of the motor shows the arrangement of the disk axial rotor, the radial rotor and the toroidal intermediate member 5. This design enables the motor to make full use of the axial and radial magnetic field distributions during operation to form an efficient hybrid magnetic flux path.

[0035] Further, as Figure 3As shown, the disc axial rotors located at the radial inner ends are respectively fixedly connected to the motor rotating shaft 8 through bearings 13. Any two adjacent disc axial rotors are fixedly connected through a non-magnetic fixing frame 12, and each non-magnetic fixing frame 12 is also fixedly connected to a disc intermediate member. The two annular radial rotors are respectively fixedly connected to the two disc axial rotors at the radial two ends through key grooves or screws, and each annular stator is fixedly connected to the motor rotating shaft 8 through a fixing member 17. Thus, the disc axial rotors, the radial rotors and the disc intermediate members form an integral structure. This integral structure is connected to the motor rotating shaft 8 through bearings 13 to ensure the stability and reliability of the rotor system during operation. The stator of the motor is directly connected to the motor shaft through a fixing member 17, enhancing the stability of the motor structure. This design simplifies the assembly process and improves the maintainability of the motor.

[0036] In another embodiment, the radial permanent magnet II 10 is a permanent magnet with NS poles arranged radially, and the annular intermediate member 5 is formed by arranging a Halbach array to form the radial permanent magnet I 9.

[0037] Embodiment 2 The difference between this embodiment and Embodiment 1 is that: at least two annular intermediate members 5 are arranged between the two annular radial rotors; The annular intermediate member 5 includes a plurality of radial permanent magnets I 9 distributed along the circumferential direction. Each radial permanent magnet I 9 has opposite magnetic poles to the circumferentially adjacent and radially adjacent radial permanent magnets I 9 respectively; On one side of each annular radial rotor facing the annular intermediate member 5, a plurality of radial permanent magnets II 10 are arranged along the circumferential direction. Each radial permanent magnet II 10 has opposite magnetic poles to the circumferentially adjacent radial permanent magnets II 10 and opposite magnetic poles to the radially adjacent radial permanent magnets I 9; An annular stator is arranged between each annular radial rotor and the adjacent annular intermediate member 5 and 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 windings 15 on the annular stators on both sides of any one annular intermediate member 5; On one shaft end side of each annular stator, a disc axial rotor is correspondingly arranged. A plurality of axial permanent magnets 11 are installed along the circumferential direction on each disc axial rotor. Each axial permanent magnet 11 has opposite magnetic poles to the circumferentially adjacent and radially adjacent axial permanent magnets 11 respectively.

[0038] It can be understood that the number of the disc axial rotors is the same as the number of the annular stators to make full use of the winding ends on each annular stator.

[0039] Further, a number of axial permanent magnets 11 are installed on each disc-type axial rotor in the circumferential direction. The magnetic poles of any two circumferentially adjacent axial permanent magnets 11 are opposite, and the magnetic poles of any two radially adjacent axial permanent magnets 11 located at the same circumferential position are opposite.

[0040] In the above solution, the annular intermediate core 5 of the traditional multi-rotor structure motor with an annular winding is removed, and only the magnetic poles of the annular intermediate member 5 are retained, enhancing the layer expandability of the motor and providing higher flexibility for the design of the multi-layer radial flux motor, further improving the torque density.

[0041] Embodiment 3 This embodiment provides a multi-phase 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.

[0042] The annular intermediate member 5 includes a non-magnetic fixing frame 12 and a number of radial permanent magnets I 9 installed on the non-magnetic fixing frame 12 in the circumferential direction. The magnetic poles of each radial permanent magnet I 9 are opposite to those of its circumferentially adjacent radial permanent magnet I 9, and the magnetic poles of the radial permanent magnet I 9 that is radially adjacent to it and located at the same circumferential position are opposite; On one side of each annular radial rotor facing the annular intermediate member 5, a number of radial permanent magnets II 10 are arranged in the circumferential direction. The magnetic poles of any two adjacent radial permanent magnets II 10 located on the same circumference are opposite.

[0043] Specifically, both the radial permanent magnet I 9 and the radial permanent magnet II 10 are permanent magnets with NS poles arranged radially.

[0044] An annular stator is provided between each annular radial rotor and the adjacent annular intermediate member 5 and 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 windings 15 on the annular stators on both sides of any one annular intermediate member 5, forming armature magnetic fields with opposite rotation directions.

[0045] During specific implementation, the A, B, and C phase currents of the stator of the radial flux permanent magnet motor change in a sinusoidal cycle, and the phase angles are mutually different by 120°; the rotation direction of the motor is consistent with the rotation direction of the magnetic field. Figure 3 Shows the radial magnetic field distribution of the motor.

[0046] The radially arranged permanent magnets I 9 with opposite magnetic poles alternately arranged on the annular middle piece 5 form permanent magnetic fields in opposite directions, which together with the armature magnetic field form a closed magnetic circuit 16 loop. Specifically, the magnetic field will pass through the annular middle piece 5 from one annular stator and enter the other annular stator, forming a large-circulation closed magnetic circuit 16. Figure 4 Figure 4 shows the magnetic pole distribution diagram of the annular middle piece 5. It can be seen that under the action of the armature magnetic field and the permanent magnetic field, the electromagnetic force directions on both sides of the annular middle piece 5 are the same at this time. Therefore, compared with the traditional rotor, removing the iron core of the annular middle piece 5 will not significantly affect the integrity of the magnetic circuit 16, while effectively shortening the axial length of the motor and reducing the iron loss and eddy current loss.

[0047] Furthermore, permanent magnetic fields of small magnetic circuits 16 are formed between the inner annular radial rotor 2 and the outer annular radial rotor 1 and their opposite annular stators respectively. Among them, the permanent magnetic field directions on both sides of each annular stator are opposite, without distinguishing between the large magnetic circuit 16 and the small magnetic circuit 16.

[0048] In the present invention, the winding form of the same-direction annular winding 15 is adopted, the positive directions of the coil currents at the corresponding positions of the adjacent stators of the motor are opposite, and the iron core of the annular middle piece 5 of the traditional multi-rotor structure motor with an annular winding is removed, only the magnetic poles of the annular middle piece 5 are retained. After removing the iron core, the radial radius of the motor is significantly shortened, the weight is reduced, the torque density is higher, and at the same time, the iron loss and eddy current loss are reduced. This design also enhances the layer scalability of the motor, provides higher flexibility for the design of multi-layer radial flux motors, and further improves the torque density.

[0049] In another embodiment, the radially arranged permanent magnets II 10 are permanent magnets with NS poles arranged radially, and the annular middle piece 5 is formed by arranging a Halbach array to form the radially arranged permanent magnets I 9.

[0050] Furthermore, the two disk-shaped axial rotors located at the axial ends are respectively fixedly connected to the radial rotors through key grooves or screws, and the disk-shaped axial rotors are also fixedly connected to the adjacent annular middle piece 5 through the non-magnetic fixing frame 12. This overall rotor structure is connected to the shaft of the motor through the bearing 13 to ensure the stability and reliability of the rotor system during operation. The stator of the motor is directly connected to the motor shaft through the fixing member 17, enhancing the stability of the motor structure. This design simplifies the assembly process and improves the maintainability of the motor.

[0051] Embodiment 4 The difference between this embodiment and Embodiment 1 is that at least two annular middle pieces 5 are arranged between the two annular radial rotors; The annular middleware 5 includes a non-magnetic fixed frame 12 and a plurality of radial permanent magnets I 9 mounted on the non-magnetic fixed frame 12 in the circumferential direction. Each radial permanent magnet I 9 has a magnetic pole opposite to that of the circumferentially adjacent radial permanent magnet I 9, and also has a magnetic pole opposite to that of the radially adjacent radial permanent magnet I 9 located at the same circumferential position. On one side of each annular radial rotor facing the annular middleware 5, a plurality of radial permanent magnets II 10 are arranged in the circumferential direction. Any two adjacent radial permanent magnets II 10 located on the same circumference have opposite magnetic poles, and each radial permanent magnet II 10 has a magnetic pole opposite to that of the radially adjacent radial permanent magnet I 9 located at the same circumferential position. An annular stator is provided between each annular radial rotor and its adjacent annular middleware 5, and also between any two annular middleware 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 windings 15 on the annular stators on both sides of any one annular middleware 5.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features. Without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A radially arranged multi-phase multi-ring same-direction annular winding radial-axial flux permanent magnet motor, characterized in that: include: Two annular radial rotors and at least one annular intermediate member spaced apart in a radial direction between the two annular radial rotors; The annular intermediate piece includes a plurality of radial permanent magnets I distributed along the circumferential direction, and each radial permanent magnet I has a magnetic pole opposite to that of the radial permanent magnets I adjacent to it in the circumferential direction and radial direction; A plurality of radial permanent magnets II are arranged along the circumferential direction on one side of each annular radial rotor facing the annular intermediate piece, and each radial permanent magnet II has a magnetic pole opposite to that of the radial permanent magnet II adjacent to it in the circumferential direction, and has a magnetic pole opposite to that of the radial permanent magnet I adjacent to it in the radial direction; An annular stator is arranged between each annular radial rotor and the adjacent annular intermediate piece and between any two annular intermediate pieces, the annular stator comprising a stator core and an annular winding in the same direction, wherein three-phase electricity in opposite positive directions is applied to the annular winding in the same direction on the annular stator on both sides of any annular intermediate piece; A disc-type axial rotor is correspondingly arranged on one axial end side of each annular stator. A plurality of axial permanent magnets are mounted on each disc-type axial rotor along the circumferential direction. The magnetic poles of each axial permanent magnet are opposite to those of the circumferentially adjacent and radially adjacent axial permanent magnets.

2. A radially arranged multi-phase multi-ring same-direction annular winding radial-axial flux permanent magnet motor according to claim 1, characterized in that: The disc-type axial rotors at the radial inner ends are fixedly connected to the motor shaft through bearings, and any two adjacent disc-type axial rotors are fixedly connected through non-magnetic fixing frames, and each non-magnetic fixing frame is also fixedly connected to a disc-type intermediate piece; the two annular radial rotors are fixedly connected to the two disc-type axial rotors at the radial ends through keyways or screws, and each annular stator is fixedly connected to the motor shaft through a fixing piece.

3. The radially arranged multi-phase multi-ring same-direction annular winding radial-axial flux permanent magnet motor according to claim 2, characterized in that: The radial permanent magnet I and the radial permanent magnet II are both permanent magnets with NS poles arranged radially.

4. The radially arranged multi-phase multi-ring same-direction 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 NS poles arranged radially, and the annular intermediate piece includes a plurality of radial permanent magnets I arranged in a Halbach array.

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

6. A multi-phase multi-ring same-direction annular winding radial flux permanent magnet motor, characterized in that: include: Two annular radial rotors and at least one annular intermediate member spaced apart in a radial direction between the two annular radial rotors; The annular intermediate piece includes a plurality of radial permanent magnets I distributed along the circumferential direction, and each radial permanent magnet I has a magnetic pole opposite to that of the radial permanent magnets I adjacent to it in the circumferential direction and radial direction; A plurality of radial permanent magnets II are arranged along the circumferential direction on one side of each annular radial rotor facing the annular intermediate piece, and each radial permanent magnet II has a magnetic pole opposite to that of the radial permanent magnet II adjacent to it in the circumferential direction, and has a magnetic pole opposite to that of the radial permanent magnet I adjacent to it in the radial direction; An annular stator is arranged between each annular radial rotor and the adjacent annular intermediate piece and between any two annular intermediate pieces, and the annular stator includes a stator core and a unidirectional annular winding, wherein three-phase electricity with opposite positive directions is applied to the unidirectional annular windings on the annular stators on both sides of any annular intermediate piece.

7. The multi-phase multi-ring same-direction annular winding radial flux permanent magnet motor according to claim 6, characterized in that: The two annular radial rotors are fixedly connected to the motor shaft via fixing members, and each annular stator is fixedly connected to the motor shaft via fixing members; each disc-type intermediate member is fixedly connected to the fixing member via a non-magnetic fixing frame.

8. A multi-phase multi-ring same-direction annular winding radial flux permanent magnet motor according to claim 6 or 7, characterized in that: The radial permanent magnet I and the radial permanent magnet II are both permanent magnets with NS poles arranged radially.

9. A multi-phase multi-ring same-direction annular winding radial flux permanent magnet motor according to claim 6 or 7, characterized in that: The radial permanent magnet II is a permanent magnet with NS poles arranged radially, and the annular intermediate piece includes a plurality of radial permanent magnets I arranged in a Halbach array.

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