Single rotor multi-stator hybrid flux motor

Abstract

The application relates to the technical field of electric machines, in particular to a single-rotor multi-stator hybrid flux electric machine which comprises a machine shell, a rotor assembly and a stator assembly; the stator assembly comprises a radial flux stator unit and a pair of axial flux stator units; the radial flux stator unit is arranged on the outer side of the rotor assembly; the pair of axial flux stator units are symmetrically arranged on the inner sides of the two ends of the rotor assembly, and the axial two side end faces of the rotor assembly are oppositely arranged with the pair of axial flux stator units; the rotor assembly and the radial flux stator unit cooperatively form a radial working air gap and a radial magnetic circuit; the rotor assembly and the axial flux stator units cooperatively form an axial working air gap and an axial magnetic circuit; the radial flux and axial flux electric machine rotor is integrally designed, the assembly difficulty of the hybrid flux electric machine is reduced, the radial flux and axial flux structures are highly integrated, and the torque density is improved.

Description

Technical Field

[0001] This invention relates to the technical field of electric motors, and more particularly to a single-rotor multi-stator hybrid flux motor. Background Technology

[0002] With the rapid development of robot joint motor technology, the performance requirements for drive motors are becoming increasingly stringent, demanding high torque density and high integration. Currently, the industry widely adopts radial motors or individual axial flux motors to improve motor torque density.

[0003] Among them, the torque output of radial flux motors depends on the magnetic field coupling in the radial direction, which has the defect of insufficient utilization of the radial space in the inner ring of the motor, and generally requires the placement of a reduction mechanism, making them unsuitable for high torque drive; the torque output of axial flux motors depends on the magnetic field coupling in the axial direction, and the optimal ratio of outer diameter to inner diameter is fixed, and with a large outer diameter, there is also the problem of low utilization of inner diameter space.

[0004] The existing patent publication number CN107026547B discloses a cage rotor axial-radial hybrid flux multi-disc permanent magnet motor, which uses the combination of multi-rotor structure and modular stator to achieve torque superposition by utilizing axial and radial magnetic fields, thereby improving the space utilization and torque density of the motor to a certain extent.

[0005] However, in practical engineering applications, this type of axial-radial hybrid flux motor generally adopts a multi-rotor split structure to achieve torque coupling output of axial and radial dual magnetic circuits. On the one hand, this structure results in low overall motor integration and complex assembly process, which is not conducive to the miniaturization and modular application of the motor. On the other hand, the split multi-rotor structure makes it difficult to ensure the consistency of the axial working air gap, which can easily lead to problems such as torque loss, running vibration and noise due to uneven air gap.

[0006] Therefore, it is necessary to provide a single-rotor multi-stator hybrid flux motor to solve the problems mentioned in the background art. Summary of the Invention

[0007] The purpose of this invention is to provide a single-rotor multi-stator hybrid flux motor. By integrating the radial flux and axial flux motor rotors into a single design, the assembly difficulty of the hybrid flux motor is reduced, and a high degree of integration of the radial flux and axial flux structures is achieved, thereby increasing the torque density.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a single-rotor multi-stator hybrid flux motor, comprising a motor housing, a rotor assembly and a stator assembly;

[0009] The stator assembly includes a radial flux stator unit and a pair of axial flux stator units;

[0010] The radial flux stator unit is located on the outside of the rotor assembly;

[0011] A pair of axial flux stator units are symmetrically arranged on the inner sides of both ends of the rotor assembly, and the axial end faces of the rotor assembly are respectively arranged opposite to the pair of axial flux stator units;

[0012] The rotor assembly and the radial flux stator unit cooperate to form a radial working air gap and a radial magnetic circuit;

[0013] The rotor assembly and the axial flux stator unit cooperate to form an axial working air gap and an axial magnetic circuit.

[0014] As a preferred embodiment of the present invention, the rotor assembly includes a rotor support, an axial magnet assembly, and a radial magnet assembly;

[0015] The axial magnet assembly includes two axial permanent magnets, one and two, which are fixed inside the rotor support on both sides in a mirror image, and the magnetization direction of the magnets on adjacent axial sides is the same.

[0016] The magnetization direction of the axial magnet assembly is parallel to the axial direction;

[0017] The number of magnets contained in both axial permanent magnet one and axial permanent magnet two is even, and they are evenly arranged in the circumferential direction.

[0018] The magnetization directions of two adjacent magnets are different.

[0019] As a preferred embodiment of the present invention, the magnetization direction of the radial magnet assembly is perpendicular to the axial direction, and the number of magnets it contains is even, and they are evenly arranged in the circumferential direction. The magnetization directions of two adjacent magnets are different, and the radial magnet assembly is fixed on the outside of the rotor support.

[0020] As a preferred embodiment of the present invention, the number of magnets in the first axial permanent magnet and the second axial permanent magnet are the same as the number of magnets in the radial magnet assembly and are aligned.

[0021] As a preferred embodiment of the present invention, the axial flux stator unit includes an axial stator core and an axial stator winding assembly;

[0022] A plurality of stator slots are provided at one end of the axial stator core;

[0023] The axial stator core has rectangular grooves in its core yoke portion. The rectangular grooves and stator slots are parallel to each other and are of the same number.

[0024] The yoke of the axial stator core has a threaded hole.

[0025] As a preferred embodiment of the present invention, the radial flux stator unit is fixed circumferentially to the radial inner side of the motor housing;

[0026] The radial flux stator unit includes a radial outer stator core and a radial outer stator winding assembly;

[0027] The number of slots in the radial outer stator core is the same as the number of slots in the axial stator core.

[0028] As a preferred embodiment of the present invention, the motor housing is provided with a plurality of protrusions in an annular shape inside, the height and width of the protrusions being the same as the depth and width of the rectangular groove, respectively.

[0029] The motor housing is adapted to the axial flux stator unit on its adjacent side, and the boss and the rectangular groove fit together.

[0030] As a preferred embodiment of the present invention, the open end of the motor housing is provided with a motor end cover, and the inside of the motor end cover is similarly provided with a number of protrusions.

[0031] The motor end cover is adapted to the axial flux stator unit on its adjacent side, and the boss and the rectangular groove fit together.

[0032] In a preferred embodiment of the present invention, the slots of the radial flux stator unit and the slots of the axial flux stator unit are aligned.

[0033] As a preferred embodiment of the present invention, a shaft body is fixedly connected through and to the inner side of the rotor assembly;

[0034] A first bearing is installed at one end of the shaft body, and the shaft body is connected to the motor housing through the first bearing.

[0035] A second bearing is installed at the other end of the shaft body. The shaft body is connected to the motor end cover through the second bearing. The shaft body passes through the motor end cover and is clearance-fitted with it. A motor oil seal is provided at the connection between the two.

[0036] Compared with the prior art, the beneficial effects achieved by the present invention are: by setting an integrated rotor assembly, the present invention avoids the assembly error of coaxiality of multiple rotors, simplifies the motor assembly process, improves the structural integration, and is suitable for standardized assembly processes in industrial mass production, compared with the existing multi-rotor split hybrid flux motor.

[0037] By setting up an inner and outer nested stator structure, the radial flux stator unit is set on the outer side, and a pair of axial flux stator units are set on the inner side of both ends of the rotor assembly. This makes full use of the idle space in the inner ring of the radial flux motor and achieves the optimal inner diameter ratio design of the axial flux stator unit under the constraint of fixed radial installation size. Compared with the existing axial splicing hybrid flux layout, a higher torque density can be achieved under the same size, which is suitable for scenarios with limited installation space, such as robot joints. Attached Figure Description

[0038] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0039] In the attached diagram:

[0040] Figure 1 This is a schematic cross-sectional view of the hybrid flux motor of the present invention;

[0041] Figure 2 This is a schematic diagram of the exploded structure of the hybrid flux motor of the present invention;

[0042] Figure 3 This is a schematic diagram of the rotor assembly of the present invention;

[0043] Figure 4 This is an exploded structural diagram of the rotor assembly of the present invention;

[0044] Figure 5 This is a schematic diagram of the radial stator assembly structure of the present invention;

[0045] Figure 6 This is a schematic diagram of the exploded structure of the radial flux outer stator assembly of the present invention;

[0046] Figure 7 This is a schematic diagram of the axial flux stator unit structure of the present invention;

[0047] Figure 8 This is a schematic diagram of the exploded structure of the axial flux stator unit of the present invention;

[0048] Figure 9 This is a schematic diagram of the axial flux stator core structure of the present invention;

[0049] Figure 10 This is a three-dimensional schematic diagram of the motor housing of the present invention;

[0050] Figure 11 This is a three-dimensional schematic diagram of the motor end cover of the present invention;

[0051] Figure 12 This is a cross-sectional schematic diagram of the rotor support of the present invention;

[0052] Figure 13This is a three-dimensional schematic diagram of the shaft body of the present invention;

[0053] In the diagram: 1. Motor housing; 2. First bearing; 3. Axial flux stator unit; 4. Rotor assembly; 5. Radial flux stator unit; 7. Motor end cover; 8. Second bearing; 9. Shaft body; 10. Motor oil seal; 11. Axial permanent magnet one; 12. Radial magnet assembly; 13. Rotor support; 14. Axial permanent magnet two; 15. Axial stator core; 16. Axial stator winding assembly; 17. Radial outer stator core; 18. Radial outer stator winding assembly. Detailed Implementation

[0054] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0055] Please see Figure 1-13 The present invention provides a technical solution: a single-rotor multi-stator hybrid flux motor, comprising a motor housing 1, a rotor assembly 4 and a stator assembly;

[0056] The stator assembly includes a radial flux stator unit 5 and a pair of axial flux stator units 3;

[0057] The radial flux stator unit 5 is located on the outside of the rotor assembly 4;

[0058] A pair of axial flux stator units 3 are symmetrically arranged on the inner sides of both ends of the rotor assembly 4, and the axial end faces of the rotor assembly 4 are respectively arranged opposite to the pair of axial flux stator units 3.

[0059] The rotor assembly 4 and the radial flux stator unit 5 cooperate to form a radial working air gap and a radial magnetic circuit;

[0060] The rotor assembly 4 and the axial flux stator unit 3 work together to form an axial working air gap and an axial magnetic circuit.

[0061] In this embodiment, by setting an integrated rotor assembly 4, compared with the existing multi-rotor split hybrid flux motor, the assembly error of multi-rotor coaxiality is avoided, the assembly process of the motor is simplified, the structural integration is improved, and it is suitable for standardized assembly process of industrial mass production.

[0062] Furthermore, by setting an inner and outer nested stator structure, the radial flux stator unit 5 is set on the outer side, and a pair of axial flux stator units 3 are set on the inner side of both ends of the rotor assembly 4, thereby making full use of the idle space of the inner ring of the radial flux motor and achieving the optimal inner diameter ratio design of the axial flux stator unit 3 under the constraint of fixed radial installation size. Compared with the existing axial splicing hybrid flux layout, a higher torque density can be achieved under the same size, which is suitable for scenarios with limited installation space such as robot joints.

[0063] Furthermore, by setting up an integrated rotor assembly 4 structure, the positional accuracy and phase synchronization of the radial permanent magnet and the axial permanent magnet are further guaranteed, ensuring the synchronous coupling of the radial magnetic circuit and the axial magnetic circuit, avoiding the magnetic circuit phase deviation caused by the multi-rotor structure, and improving the smoothness of motor operation; at the same time, the integrated rotor structure can reduce the moment of inertia and improve the dynamic response performance of the motor.

[0064] Furthermore, a pair of axial flux stator units 3 are symmetrically installed at both ends of the motor housing 1 to ensure the parallelism and coaxiality of the two axial stators, thereby ensuring the consistency of the axial working air gap on both sides, reducing the difficulty of air gap adjustment, and ensuring the reliability of motor operation.

[0065] Furthermore, the motor housing 1 provides a radial positioning reference for the radial flux stator unit 5 and a unified axial mounting reference for a pair of axial flux stator units 3, ensuring the form and position tolerances of the stator assembly as a whole and ensuring the uniformity of the radial and axial working air gaps.

[0066] Preferably, the radial working air gap is a uniform annular air gap between the outer circular surface of the rotor assembly 4 and the inner circular surface of the radial flux stator unit 5;

[0067] The radial magnetic circuit is formed by the radial permanent magnet N pole on the rotor assembly 4 passing radially through the radial working air gap, entering the iron core teeth of the radial flux stator unit 5, then flowing circumferentially through the iron core yoke of the radial flux stator unit 5, exiting radially through the adjacent iron core teeth, passing through the radial working air gap again to enter the radial permanent magnet S pole on the rotor assembly 4, and finally returning to the permanent magnet N pole through the magnetic conductive substrate of the rotor assembly 4, forming a closed radial magnetic circuit.

[0068] Preferably, the axial working air gap is a circular uniform air gap between the two axial end faces of the rotor assembly 4 and the end face of the corresponding axial flux stator unit 3, with the thickness of the air gap on both sides being the same.

[0069] A single axial magnetic circuit consists of the N pole of the axial permanent magnet on the end face of the rotor assembly 4 passing through the axial working air gap, entering the iron core teeth of the corresponding axial flux stator unit 3, flowing radially through the iron core yoke of the axial flux stator unit 3, then passing through the adjacent iron core teeth axially, passing through the axial working air gap again, entering the S pole of the axial permanent magnet on the end face of the rotor assembly 4, and finally returning to the N pole of the permanent magnet through the magnetic conductive substrate of the rotor assembly 4, forming a closed axial magnetic circuit; the two sets of axial magnetic circuits are symmetrically arranged along the axial center plane of the rotor assembly 4.

[0070] Based on the above embodiments, the rotor assembly 4 includes a rotor support 13, an axial magnet assembly, and a radial magnet assembly 12;

[0071] The axial magnet assembly includes an axial permanent magnet 11 and an axial permanent magnet 14 with the same configuration, and the two are fixed inside the rotor support 13 on both sides in a mirror image, and the magnetization direction of the magnets on adjacent axial sides is the same.

[0072] The magnetization direction of the axial magnet assembly is parallel to the axial direction;

[0073] The number of magnets contained in axial permanent magnet 11 and axial permanent magnet 2 14 are both even numbers and are evenly distributed in the circumferential direction.

[0074] The magnetization directions of two adjacent magnets are different.

[0075] In this embodiment, by setting the rotor support 13, the radial magnet assembly 12, the axial permanent magnet 11 and the axial permanent magnet 14 are integrated into a single base. Compared with the existing multi-rotor split hybrid flux motor structure, this avoids the assembly errors of coaxiality and phase difference between multiple rotors, simplifies the assembly process, and reduces the rotational inertia of the rotor assembly 4, thereby improving the dynamic response performance of the motor.

[0076] Furthermore, the axial permanent magnet 11 and the axial permanent magnet 14 are mirror-symmetrical and axially aligned with the same magnetization direction, ensuring that the magnetic resistance and magnetic flux of the axial magnetic circuits on both sides are consistent, ensuring the magnetic field uniformity of the axial working air gaps on both sides, avoiding the imbalance of rotor axial magnetic pull caused by the asymmetry of the magnetic circuits on both sides, reducing the bearing operating load, and improving the reliability and service life of the motor.

[0077] Preferably, the rotor support 13 is configured as an integrated disc-shaped structural component, made of 10# low carbon steel, which can achieve efficient magnetic conduction;

[0078] Preferably, axial permanent magnet 11 and axial permanent magnet 14 are fixed in mirror image to the inside of both sides of rotor support 13 with the axial center plane of rotor support 13 as reference; and the number and size of the magnets of axial permanent magnet 11 and axial permanent magnet 14, the circumferential arrangement angle and magnetic performance parameters are the same, and after assembly, the individual magnets of the two are aligned one-to-one along the axial direction of rotor support 13.

[0079] Based on the above embodiments, the magnetization direction of the radial magnet assembly 12 is perpendicular to the axial direction, and the number of magnets it contains is even. They are evenly arranged in the circumferential direction, and the magnetization directions of adjacent magnets are different. The radial magnet assembly 12 is fixed on the outside of the rotor support 13.

[0080] In this embodiment, the magnetization direction is set to be perpendicular to the axial direction, and the magnetic pole arrangement is matched with the axial magnet assembly to achieve synchronous excitation phase of the radial magnetic circuit and the axial magnetic circuit, thereby avoiding phase deviation during the coupling process of the two magnetic circuits.

[0081] Furthermore, by setting an even number of magnets, the number of N poles and S poles are ensured to be equal; and by arranging them evenly around the circumference, the magnetic pole distribution in the circumferential direction of the rotor is ensured to be symmetrical and the mass distribution is uniform, reducing the difficulty of rotor dynamic balance adjustment and making it suitable for high-precision robot joint scenarios.

[0082] Based on the above embodiments, the number of magnets in the axial permanent magnet 11 and the axial permanent magnet 14 are the same as the number of magnets in the radial magnet assembly 12 and are aligned.

[0083] In this embodiment, the three magnets are circumferentially aligned to ensure that the excitation phase of the axial magnetic circuit and the radial magnetic circuit is synchronized, avoiding phase deviation caused by manual assembly. No additional adjustment of the magnetic pole phase is required, reducing assembly difficulty and ensuring the consistency of mass production performance.

[0084] Furthermore, by setting up a design with the same number and phase alignment, the torque of the radial magnetic circuit and the axial magnetic circuit is synchronously superimposed, thereby improving the smoothness of motor operation and torque output efficiency.

[0085] Based on the above embodiments, the axial flux stator unit 3 includes an axial stator core 15 and an axial stator winding assembly 16;

[0086] A number of stator slots are provided at one end of the axial stator core 15;

[0087] A rectangular groove is provided on the core yoke of the axial stator core 15. The rectangular groove and the stator slot are parallel to each other and the same number of them are provided.

[0088] A threaded hole is provided in the yoke of the axial stator core 15.

[0089] In this embodiment, a rectangular groove is provided to achieve positioning and weight reduction functions. While ensuring installation and positioning accuracy, the overall weight of the stator core is reduced, and the torque density of the motor is increased.

[0090] Furthermore, a threaded hole for a pre-embedded wire thread sleeve is provided in the yoke of the axial stator core 15 to prevent the threaded hole of the silicon steel sheet from stripping, improve the convenience of disassembly and maintenance of the stator components, and at the same time ensure the axial installation locking force to prevent the stator from loosening during motor operation.

[0091] Preferably, the axial stator core 15 is made of thin silicon steel sheet wound together, and a number of stator slots are opened at one end facing the rotor assembly 4. The stator slots are evenly distributed along the circumference of the axial stator core 15 and are radially open slot structures. The number of stator slots is a positive integer multiple of 3, which is the same as the number of stator slots in the radial flux stator unit 5.

[0092] Preferably, a threaded hole is provided to facilitate the axial threaded connection between the axial stator core 15 and the motor housing 1 and the motor end cover, thereby achieving the locking and fixing of the axial flux stator unit 3.

[0093] Based on the above embodiments, the radial flux stator unit 5 is fixed circumferentially to the radial inner side of the motor housing 1;

[0094] The radial flux stator unit 5 includes a radial outer stator core 17 and a radial outer stator winding assembly 18;

[0095] The number of slots in the radial outer stator core 17 is the same as the number of stator slots in the axial stator core 15.

[0096] In this embodiment, the number of slots of the two are matched, which facilitates the circumferential alignment of the stator slots, eliminates the need for additional phase difference calculation, and simplifies the assembly and alignment process.

[0097] Preferably, the inner wall of the motor housing 1 is provided with a coaxial annular mounting stop. The inner diameter of the stop and the outer diameter of the radial flux stator unit 5 are interference-fitted. After assembly, the outer circular surface of the radial flux stator unit 5 is completely in contact with the inner wall of the motor housing 1, and the axial movement is achieved by the step of the housing stop.

[0098] Preferably, the radial outer stator core 17 is formed by stacking thin cores, and stator slots are uniformly opened on its inner circular surface along the circumference; the number of slots of the radial outer stator core 17 is the same as the number of stator slots of the axial stator core 15, both being positive integer multiples of 3, and the circumferential central angle of a single slot of both is consistent.

[0099] Based on the above embodiments, the motor housing 1 has a plurality of protrusions arranged in a ring inside, and the height and width of the protrusions are the same as the depth and width of the rectangular groove, respectively.

[0100] The motor housing 1 is adapted to the axial flux stator unit 3 on its adjacent side, with the boss and rectangular groove fitting together.

[0101] Based on the above embodiments, a motor end cover 7 is provided at the open end of the motor housing 1, and a number of protrusions are similarly provided inside the motor end cover 7.

[0102] The motor end cover 7 is adapted to the axial flux stator unit 3 on its adjacent side, with the boss and rectangular groove fitting together.

[0103] In this embodiment, the motor housing 1 and the motor end cover 7 are provided with a boss structure that matches the rectangular groove. During assembly, the axial flux stator unit 3 can be circumferentially positioned by simply embedding and fitting it, which simplifies the assembly process, improves assembly efficiency and yield. In addition, the positioning structure has a foolproof function. Assembly can only be completed when the boss and the rectangular groove are completely aligned, avoiding stator reverse installation and circumferential misalignment, and reducing the error rate of mass production assembly.

[0104] Furthermore, by setting the boss and the rectangular groove to fit together, the tangential electromagnetic force on the stator during motor operation is further dispersed, avoiding the problem of stator loosening caused by the threaded connection being subjected to force alone, and improving the structural reliability and vibration resistance of the motor operation.

[0105] Based on the above embodiments, the slots of the radial flux stator unit 5 and the slots of the axial flux stator unit 3 are aligned.

[0106] In this embodiment, by aligning the stator slots and ensuring that the radial and axial magnets on the rotor assembly 4 are of the same number and circumferentially aligned, the phase synchronization of the radial and axial armature magnetic fields with the excitation magnetic field is achieved, avoiding the internal loss of tangential electromagnetic force and torque pulsation caused by the phase difference of the magnetic field, and improving the torque density of the motor.

[0107] Based on the above embodiments, a shaft body 9 is fixedly connected through and to the inner side of the rotor assembly 4;

[0108] A first bearing 2 is installed at one end of the shaft body 9, and the shaft body 9 is connected to the motor housing 1 through the first bearing 2.

[0109] The other end of the shaft body 9 is equipped with a second bearing 8. The shaft body 9 is connected to the motor end cover 7 through the second bearing 8. The shaft body 9 passes through the motor end cover 7 and is clearance-fitted with it. A motor oil seal 10 is provided at the connection between the two.

[0110] In this embodiment, the rotor assembly 4 is supported by bearings of the same type at both ends of the shaft body 9. The axial and radial positions of the rotor assembly 4 are limited by the bearings at both ends, ensuring that the axial working air gap of the rotor assembly 4 is consistent with that of the axial flux stator units 3 on both sides, thus avoiding the problem of uneven axial air gap of the hybrid flux motor.

[0111] Furthermore, by setting a small clearance fit between the shaft body 9 and the motor end cover 7, and in conjunction with the sealing structure of the motor oil seal 10, a sealing protection is achieved, which is suitable for industrial sites or robot operations and other scenarios with a lot of dust and oil. At the same time, the clearance fit avoids friction between the shaft body and the end cover during the rotation process, thereby improving the motor's operating efficiency.

[0112] Preferably, the shaft body 9 and the rotor assembly 4 are fixed by an interference fit and a key connection, which enhances the transmission rigidity, ensures high coaxiality accuracy, reduces vibration and noise during rotor rotation, and at the same time ensures the positional accuracy of the radial and axial magnets on the rotor assembly 4.

[0113] Preferably, the outer ring of the motor oil seal 10 is interference-fitted with the sealing groove at the center of the motor end cover 7, and the inner ring lip is interference-fitted with the outer circular surface of the shaft body 9.

[0114] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection, the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.

[0115] The above provides a detailed description of a single-rotor multi-stator hybrid flux motor provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A single-rotor, multi-stator hybrid flux motor, characterized in that, It includes a motor housing (1), a rotor assembly (4), and a stator assembly; The stator assembly includes a radial flux stator unit (5) and a pair of axial flux stator units (3); The radial flux stator unit (5) is disposed on the outside of the rotor assembly (4); A pair of axial flux stator units (3) are symmetrically arranged on the inner sides of both ends of the rotor assembly (4), and the axial end faces of the rotor assembly (4) are respectively arranged opposite to the pair of axial flux stator units (3); The rotor assembly (4) and the radial flux stator unit (5) cooperate to form a radial working air gap and a radial magnetic circuit; The rotor assembly (4) and the axial flux stator unit (3) cooperate to form an axial working air gap and an axial magnetic circuit.

2. The single-rotor multi-stator hybrid flux motor according to claim 1, characterized in that, The rotor assembly (4) includes a rotor support (13), an axial magnet assembly, and a radial magnet assembly (12). The axial magnet assembly includes an axial permanent magnet one (11) and an axial permanent magnet two (14) with the same configuration, and the two are fixed in mirror image to the inside of both sides of the rotor support (13), and the magnetization direction of the magnets on adjacent axial sides is the same. The magnetization direction of the axial magnet assembly is parallel to the axial direction; The number of magnets contained in the first axial permanent magnet (11) and the second axial permanent magnet (14) are both even numbers and are evenly arranged in the circumferential direction. The magnetization directions of two adjacent magnets are different.

3. A single-rotor multi-stator hybrid flux motor according to claim 2, characterized in that, The magnetization direction of the radial magnet assembly (12) is perpendicular to the axial direction, and it contains an even number of magnets that are evenly arranged in the circumferential direction. The magnetization directions of two adjacent magnets are different. The radial magnet assembly (12) is fixed on the outside of the rotor support (13).

4. A single-rotor multi-stator hybrid flux motor according to claim 2 or 3, characterized in that, The magnets in the first axial permanent magnet (11) and the second axial permanent magnet (14) are the same number as the magnets in the radial magnet assembly (12) and are aligned.

5. A single-rotor multi-stator hybrid flux motor according to claim 1, characterized in that, The axial flux stator unit (3) includes an axial stator core (15) and an axial stator winding assembly (16). The axial stator core (15) has several stator slots at one end; The axial stator core (15) has a rectangular groove in its core yoke. The rectangular groove and the stator groove are parallel to each other and are the same in number. The yoke of the axial stator core (15) has a threaded hole.

6. A single-rotor multi-stator hybrid flux motor according to claim 5, characterized in that, The radial flux stator unit (5) is fixed circumferentially to the radial inner side of the motor housing (1); The radial flux stator unit (5) includes a radial outer stator core (17) and a radial outer stator winding assembly (18). The number of slots in the radial outer stator core (17) is the same as the number of stator slots in the axial stator core (15).

7. A single-rotor multi-stator hybrid flux motor according to claim 5, characterized in that, The motor housing (1) has several protrusions arranged in a ring inside, and the height and width of the protrusions are the same as the depth and width of the rectangular groove, respectively. The motor housing (1) is adapted to the axial flux stator unit (3) on its adjacent side, and the boss and the rectangular groove fit together.

8. A single-rotor multi-stator hybrid flux motor according to claim 7, characterized in that, The motor housing (1) is provided with a motor end cover (7) at the open end, and the motor end cover (7) is similarly provided with several protrusions inside. The motor end cover (7) is adapted to the axial flux stator unit (3) on its adjacent side, and the boss and the rectangular groove fit together.

9. A single-rotor multi-stator hybrid flux motor according to claim 1, characterized in that, The slots of the radial flux stator unit (5) and the slots of the axial flux stator unit (3) are aligned.

10. A single-rotor multi-stator hybrid flux motor according to claim 7, characterized in that, The inner side of the rotor assembly (4) is connected to the shaft body (9). A first bearing (2) is installed at one end of the shaft body (9), and the shaft body (9) is connected to the motor housing (1) through the first bearing (2); The other end of the shaft body (9) is equipped with a second bearing (8). The shaft body (9) is connected to the motor end cover (7) through the second bearing (8). The shaft body (9) passes through the motor end cover (7) and is fitted with it with a clearance. A motor oil seal (10) is provided at the connection between the two.

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