Self-supporting foil type winding axial flux motor

Abstract

The invention belongs to the technical field of motors, and particularly relates to a self-supporting foil type winding axial magnetic flux motor which comprises a motor shaft, a stator assembly and a pair of rotor assemblies. The stator assembly comprises a central hub sleeved on the motor shaft, a plurality of stator cores uniformly distributed around the central hub and a stator frame sleeved on the outer sides of all the stator cores, the stator frame is fixedly connected with the central hub through a connecting piece, each stator core comprises an outer stator pole and an inner stator pole, and the outer stator pole is fixedly connected with the central hub through a connecting piece. A coil is wound on the side face of the outer stator pole to form a stator winding, the inner stator pole is attached to the inner side of the outer stator pole, the stator iron core is fixed between the center hub and the stator frame, and the rotor assembly is fixedly connected with a rotating piece for outputting torque. A coil can be conveniently and reliably wound on the side face, the influence of rotating motion on an air gap is small, and the size of the air gap can be easily controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a self-supporting foil winding axial flux motor. Background Art

[0002] In recent years, axial flux motors have been widely used in vehicles because their short axial length allows for a more compact design in the vehicle powertrain. Axial flux switched reluctance motors can have the advantages of short axial length and high torque density, which are typical characteristics of axial flux motors, without the need to use permanent magnet materials. An axial flux motor (AFM) has a disc-shaped rotor and stator arranged in a coplanar manner, where the magnetic flux acts in the direction of the rotation axis.

[0003] However, in existing axial flux motors, the existing motor structure makes it difficult to ensure that the air gap between the rotor and the stator is small and uniform, because the magnetic force is much greater than that of radial motors, and it is difficult to maintain a uniform air gap. At the same time, because the winding is located deep in the stator and between the two rotor disks, heat dissipation is very difficult. In addition, in conventional axial flux motors, the stator winding has some concave edges, which makes the winding process complicated and the winding reliability has certain defects. Summary of the invention

[0004] The purpose of the present invention is to provide a self-supporting foil winding axial flux motor to solve the technical problems of unstable air gap between rotor and stator, difficult winding heat dissipation, complex winding process and insufficient winding reliability in the prior art.

[0005] The self-supporting foil winding axial flux motor comprises a motor shaft, a stator assembly and a pair of rotor assemblies, wherein the stator assembly is arranged between the pair of rotor assemblies, the stator assembly comprises a central hub sleeved on the motor shaft, a plurality of stator cores evenly arranged around the central hub and a stator frame sleeved on the outside of all the stator cores, the stator frame and the central hub are fixedly connected by a connecting member, the stator core comprises an outer stator pole and an inner stator pole, a coil is wound around the side of the outer stator pole to form a stator winding, the inner stator pole is fitted on the inner side of the outer stator pole, the stator core is fixed between the central hub and the stator frame, the rotor comprises a rotor mounting structure rotatably connected to the central hub through a bearing and rotor poles evenly arranged circumferentially mounted on the mounting structure, and a rotating member for outputting torque is fixedly connected to the rotor assembly.

[0006] Preferably, the outer side and the inner side of the outer stator pole are respectively an outer convex surface and an inner convex surface protruding toward the motor shaft, the inner convex surface is located at the center of the stator core, the coil is a foil coil wound around the inner convex surface and the outer convex surface, and the outer side and the inner side of the inner stator pole are respectively an outer concave surface that fits the foil coil on the inner convex surface and an inner concave surface that fits the side of the center hub.

[0007] Preferably, the stator frame includes an aluminum stator outer ring, the inner side of the stator outer ring is provided with a stator slot that matches the outer coil portion of the outer stator pole; the stator outer ring is fixedly connected to the central hub via a stator spine, the stator spine includes an annular disc portion and a spine portion radially extending from the annular disc portion, the annular disc portion is fixedly sleeved with the central hub, the spine portion is correspondingly arranged between two adjacent stator cores, the inner stator pole is provided with a groove, a groove-shaped opening that is plug-matched with the groove is formed between two adjacent spine portions, and the protruding end of the spine portion is fixedly connected to the mounting portion on the inner side of the stator outer ring.

[0008] Preferably, the stator module adopts a structural winding, the connecting part of the structural winding is directly bonded and fixed to the central hub and the stator outer ring through an adhesive layer, and the inner cavity accommodating the stator module between the central hub and the stator outer ring is integrally encapsulated by a thermosetting polymer.

[0009] Preferably, the two end faces of the coil are at a certain axial distance from the two corresponding end faces of the stator core, and the stator core is provided with a pair of end plates on both sides of the axial direction, and the end plates are provided with through grooves matching the end faces of the stator core, and the two end portions of the stator core are exposed from the through grooves, and the stator core is bonded and fixed to the end plates by an adhesive.

[0010] Preferably, the rotor mounting structure includes a rotor yoke and a rotor fixing ring, the rotor yoke is provided with rotor slots corresponding one-to-one to the rotor poles, the rotor slots are open in the direction of the stator, the rotor fixing ring is fixed on one side of the rotor slot opening to fix the rotor poles in the rotor slots, and the tops of the rotor poles are exposed from the pole through slots.

[0011] Preferably, the rotor pole includes an upper rotor pole and a lower rotor pole, the upper rotor pole is smaller than the lower rotor pole, the lower rotor pole is embedded in the rotor slot, and the rotor fixing ring is provided with a magnetic pole slot matching the upper rotor pole, and the top of the upper rotor pole is exposed from the magnetic pole slot.

[0012] Preferably, the motor mounting structure for connecting to the vehicle frame or the machine frame is arranged on the outer edge of the stator outer ring, and the motor shaft is an inner rotating shaft, which passes through the center hole of the center hub and can rotate relatively, and the inner rotating shaft extends from the outer end surface of the rotor assembly; the rotating part which is key-connected to the inner rotating shaft for transmission is fixed on the rotor assembly.

[0013] Preferably, the motor mounting structure for connecting to the vehicle frame or the machine frame is arranged on the protruding part of the motor shaft, the motor shaft is a hollow half-shaft, the cable passes into the motor from the inner cavity in the center of the motor shaft, and the rotating part is directly fixed on the plate surface on the outside of the rotor assembly.

[0014] The present invention has the following advantages: In this solution, the magnetic interface between the rotor assembly and the stator assembly is located on a plane perpendicular to the motor's rotating shaft, so the rotational motion has little effect on the air gap and is conducive to controlling the size of the air gap. This solution also achieves radial positioning of the stator module through the stator slot, the spine part and the slot-shaped opening, and at the same time, the inner cavity accommodating the stator module between the central hub and the stator outer ring is integrally encapsulated by a thermosetting polymer, and the connection between the groove and the slot-shaped opening can axially position the stator module and limit the axial movement of the stator module before encapsulation. The reduction of the air gap and the increase of the motor's operating stability improve the motor's efficiency while also ensuring the motor's operating quality.

[0015] In the stator module, since the outer stator pole has no concave surface, the outer stator pole serving as the winding can be wound with coils on the side more conveniently and reliably. On the other hand, the inner stator pole can cooperate with other components to install the outer stator pole and constrain the position of the outer stator pole, and form a magnetic flux return path. Moreover, since there is no coil wound on it, grooves and other structures can be conveniently set to facilitate installation.

[0016] This solution can also complete the radial and axial fixation of the stator module through the end plate structure, and ensure the axial stability of the stator core by constraining the coil and bonding with adhesive, so as to stabilize the size of the air gap in the motor; the air gap is separated by a circular gasket as thin as possible to reduce the air gap. The setting of the ventilation holes on the rotor assembly combined with the motor structure can quickly contact the air with the stator winding without setting the end plate to improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the self-supporting foil winding axial flux motor of the present invention.

[0018] Figure 2 for Figure 1 Exploded view of the structure shown.

[0019] Figure 3 for Figure 1 3D cross-sectional view of the structure shown.

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the stator assembly in the structure shown.

[0021] Figure 5 for Figure 4 Exploded view of the structure shown.

[0022] Figure 6 for Figure 5 Schematic diagram of the structure of the stator spine in the structure shown.

[0023] Figure 7 for Figure 5 Schematic diagram of the structure of the stator outer ring in the structure shown.

[0024] Figure 8 It is a schematic structural diagram of a stator module and an end plate when an end plate is provided in another embodiment of the present invention.

[0025] Fig. 9 for Figure 1 Schematic diagram of the structure of the rotor assembly in the shown structure.

[0026] Fig.10 for Fig.10 Schematic diagram of the structure of the rotor poles in the structure shown.

[0027] Fig.11 It is a schematic diagram of the magnetic flux between the stator winding and the rotor poles in the present invention.

[0028] The reference numerals in the figure include: 1, motor shaft, 2, stator assembly, 201, outer stator pole, 202, inner stator pole, 203, foil coil, 204, stator outer ring, 2041, stator slot, 2042, mounting portion, 2043, motor mounting structure, 205, stator spine, 2051, annular disc portion, 2052, slot opening, 2053, spine portion, 206, cable fixing ring, 207, end plate, 3, rotor assembly, 301, rotor pole, 3011, rotor pole lower portion, 3012, rotor pole upper portion, 302, rotor yoke, 303, rotor fixing ring, 304, bearing, 4, rotating part, 401, rotor flange, 402, locking nut, 5, center hub. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0030] like Figures 1 to 11As shown, the present invention provides a self-supporting foil winding axial flux motor, comprising a motor shaft 1, a stator assembly 2 and a pair of rotor assemblies 3, wherein the stator assembly 2 is arranged between the pair of rotor assemblies 3, the stator assembly 2 comprises a central hub 5 sleeved on the motor shaft 1, a plurality of stator cores evenly arranged around the central hub 5 and a stator frame sleeved on the outside of all the stator cores, the stator frame and the central hub 5 are fixedly connected by a connecting member, the stator core comprises an outer stator pole 201 and an inner stator pole 202, a coil is wound around the side of the outer stator pole 201 to form a stator winding, the inner stator pole 202 is attached to the inner side of the outer stator pole 201, the stator core is fixed between the central hub 5 and the stator frame, the rotor comprises a rotor mounting structure rotatably connected to the central hub 5 through a bearing 304 and rotor poles 301 evenly arranged circumferentially mounted on the mounting structure, and a rotating member 4 for outputting torque is fixedly connected to the rotor assembly 3.

[0031] After adopting the above structure, the outer stator pole 201, the inner stator pole 202, and the coil form a stator module, and the rotor poles 301 on both sides of the stator module become the flux return poles. The outer stator pole 201 as a winding has its magnetic flux forming a return path through the flux return poles on both sides and the inner stator pole 202. Since the number of rotor poles 301 is less than the number of stator modules, the magnetic resistance changes as the center lines of the rotor poles 301 and the stator modules are aligned or staggered. The magnetic flux is always closed along the path with the smallest magnetic resistance, thereby generating a magnetic pull, and then forming an electromagnetic torque of magnetic resistance to drive the motor to run. In this structure, the magnetic interface between the rotor assembly 3 and the stator assembly 2 is located on a plane perpendicular to the motor rotation axis, so the rotational motion has little effect on the air gap, and it is conducive to controlling the size of the air gap.

[0032] The outer side of the outer stator pole 201 is an outer convex surface, which is also an arc surface centered on the motor shaft 1. The inner side of the outer stator pole 201 is an inner convex surface protruding toward the motor shaft 1 and located at the center of the stator core. The coil is a foil coil 203 wound around the inner convex surface and the outer convex surface. The outer side of the inner stator pole 202 is an outer concave surface that fits the foil coil 203 on the inner convex surface. The inner side of the inner stator pole 202 is an inner concave surface that fits the side of the central hub 5. Since the outer stator pole 201 has no concave surface, this structure allows the outer stator pole 201 as a winding to be wound with coils on the side more conveniently and reliably. On the other hand, the inner stator pole 202 can cooperate with other components to install the outer stator pole 201, constrain the position of the outer stator pole 201, and form a magnetic flux return path. In addition, since there is no coil wound around it, it is convenient to set structures such as grooves to facilitate installation.

[0033] The stator frame includes an aluminum stator outer ring 204, the inner side of which is provided with a stator slot 2041 that matches with the outer coil portion of the outer stator pole 201; the stator outer ring 204 is fixedly connected to the central hub 5 via a stator spine 205, the stator spine 205 includes an annular disc portion 2051 and a spine portion 2053 radially extending from the annular disc portion 2051, the center hole of the annular disc portion 2051 is fixedly connected to the central hub 5, the spine portion 2053 is correspondingly arranged between two adjacent stator cores, the inner concave surface and the two side straight surfaces of the inner stator pole 202 are provided with grooves connected as one body, a groove-shaped opening 2052 that is plug-matched with the groove on the inner stator pole 202 is formed between two adjacent spine portions 2053, and the extended end of the spine portion 2053 is fixedly connected to the mounting portion 2042 on the inner side of the stator outer ring 204.

[0034] The above structure realizes radial positioning of the stator module through the stator slot 2041, the spine portion 2053 and the slot-shaped opening 2052, but the entire stator module is still prone to axial movement. Therefore, the present solution can also use thermosetting polymer to encapsulate the inner cavity accommodating the stator module between the central hub 5 and the stator outer ring 204 as a whole, and the connection between the groove and the slot-shaped opening 2052 can axially position the stator module and limit the axial movement of the stator module before encapsulation.

[0035] This solution does not need to remove the effective material of the stator when achieving the effect of reducing the air gap, so that the static torque characteristics are not affected. At the same time, the end plate 207 should be as narrow as possible to maximize the winding space. Since the end plate 207 will have eddy current losses, there will be peaks when the stator magnetic flux changes transiently. Removing the "bridge" formed by the end plate 207 can reduce losses. Therefore, this embodiment uses a structural winding with an adhesive layer to replace the fixed gasket and the end plate 207. The connecting part of the structural winding is directly bonded and fixed to the central hub 5 and the stator outer ring 204 through the adhesive layer. The floating of the magnetic poles is only supported by the winding. During processing, the B-stage Nomex insulation material is placed in layers and cured to achieve a strong and precise foil winding. The shear force of the winding layer is related to factors such as the phase current. In addition, the axial force borne by the outer stator pole 201 should not exceed 160N, so as to ensure the axial magnetic force balance. The outer end surface of the stator outer ring 204 is fixedly connected with a cable fixing ring 206. The cable fixing ring 206 is fixedly connected to both sides of the stator core, which can keep the foil terminals of the foil coil 203 flat and allow the outer surface of the stator outer ring 204 to serve as a tray for the interphase cables.

[0036] In another embodiment, the two end faces of the coil are at a certain distance from the two corresponding end faces of the stator core in the axial direction, and the stator core is provided with a pair of end plates 207 on both sides of the axial direction, and the end plates 207 are provided with through slots matching the end faces of the stator core, and the two ends of the stator core are exposed from the through slots, and the stator core is bonded and fixed to the end plates 207 by adhesive. Since the stator core is divided into an inner stator pole 202 and an outer stator pole 201, the through slot is also provided with a rib corresponding to the coil part at the inner convex surface in the middle, so that the through slot is divided into a through slot 1 corresponding to the outer stator pole 201 and a through slot 2 corresponding to the inner stator pole 202.

[0037] The end plate 207 is an annular plate, the radial inner side of the end plate 207 is fixedly connected to the central hub 5, and the radial outer side of the end plate 207 is fixedly connected to the stator outer ring 204. A cable fixing ring 206 fixedly connected to the stator outer ring 204 is also sandwiched between the end plate 207 and the stator outer ring 204. The radial and axial fixation of the stator module is completed by the end plate 207 structure, and the axial stability of the stator core is ensured by the constraint of the coil and the bonding of the adhesive, so that the air gap size in the motor is stable and the air gap can be reduced.

[0038] During the assembly process of the stator assembly 2, the stator spine 205 is first bolted to the central hub 5 to achieve fixation; the inner stator pole 202 is first connected to the slotted opening 2052 on the stator spine 205, and then the end plate 207 of the spine portion 2053 is bolted to the corresponding mounting portion 2042 on the inner side of the stator outer ring 204. Then the outer pole with a complete winding is inserted between the inner stator pole 202 and the stator slot 2041. When installing the rotor assembly 3, a circular gasket as thin as possible (the circular gasket is only 0.1 mm thick in this solution) is placed on the hub to separate the air gap. Then the encapsulant is filled into the inner cavity containing the stator module and cured. Finally, the cable fixing ring 206 is bolted to both sides of the stator assembly 2, and the foil terminal piece is kept flat.

[0039] The rotor mounting structure includes a rotor yoke 302 and a rotor fixing ring 303. The rotor yoke 302 is provided with rotor slots corresponding to the rotor poles 301 one by one. The rotor slots are open in the direction of the stator. The rotor poles 301 include a rotor pole upper part 3012 and a rotor pole lower part 3011. The rotor pole upper part 3012 is smaller than the rotor pole lower part 3011. The rotor pole lower part 3011 is embedded in the rotor slot. The rotor fixing ring 303 is fixed on one side of the rotor slot opening. The rotor fixing ring 303 is provided with a magnetic pole slot matching the rotor pole upper part 3012. The top of the rotor pole upper part 3012 is exposed from the magnetic pole slot. The rotor mounting structure is provided with an air duct located between adjacent rotor poles 301, and the air duct allows more airflow to enter the air gap. The rotor fixing ring 303 and the rotor slot effectively clamp the rotor pole lower part 3011 embedded in the rotor slot, ensuring the stability of the rotor pole 301 during rotation.

[0040] The rotor pole 301 has a step feature, which is located at half the height of the rotor pole 301, and the outer edge of the upper rotor pole 3012 is offset inward by 2.5 mm from the outer edge of the lower rotor pole 3011. The rotor pole 301 is a pole of a soft magnetic composite material, and the rotor fixing ring 303 and the rotor yoke 302 have the same or similar radial stiffness, thereby avoiding the rotor pole 301 of the soft magnetic composite material from generating shear stress during operation. In addition, the fit between the rotor pole 301 and the rotor yoke 302 or the rotor fixing ring 303 has similar tolerances, otherwise the rotor pole 301 of the soft magnetic composite material will be subjected to uneven loads. Carbon fiber reinforced polymer (CFRP) has high stiffness, low conductivity and good damping properties, so carbon fiber reinforced polymer is used as the material of the rotor mounting structure in this solution.

[0041] Through the above structure, the present solution prevents the rotor assembly 3 or the stator assembly 2 from colliding by providing sufficient rigidity in the axial direction; at the same time, it prevents the rotor pole 301 from breaking by providing sufficient structural support at high speed to resist the centrifugal load. The above structural design and material selection can minimize the additional parasitic induction loss and the resonance effect of the cyclic load. The bearing 304 between the rotor yoke 302 and the center hub 5 adopts an angular contact ball bearing 304, which has a high axial load and can meet the strict air gap tolerance. The center hub 5 is provided with a bearing 304 disassembly groove to leave a gap when disassembling the bearing 304, and the matching tolerance between the circumferential thickness and the rotor yoke 302 is controlled to facilitate the disassembly and reinstallation of the rotor mounting structure during the assembly process.

[0042] In this solution, the motor mounting structure 2043 of the self-supporting foil winding axial flux motor for connecting to the vehicle frame or the frame can be arranged on the outer edge of the stator outer ring 204, or can be arranged on the protruding part of the motor shaft 1, that is, the peripheral mounted self-supporting foil winding axial flux motor and the shaft mounted self-supporting foil winding axial flux motor. The power output end of the self-supporting foil winding axial flux motor is a rotating part 4 fixedly connected to at least one rotor assembly 3, such as a synchronous pulley. The shaft mounted self-supporting foil winding axial flux motor uses a hollow half shaft as the motor shaft 1, and the cable is passed into the motor from the inner cavity at the center of the motor shaft 1, and the rotating part 4 is directly fixed on the plate surface outside the rotor assembly 3. The motor shaft 1 of the peripheral mounted self-supporting foil winding axial flux motor is an inner rotating shaft, which passes through the center hole of the central hub 5 and can rotate relatively, and the inner rotating shaft protrudes from the outer end surface of the rotor assembly 3. A rotor flange 401 is fixed on the rotor assembly 3, and the rotor flange 401 is connected to the inner shaft through a key transmission. The rotating member 4 is sleeved on the protruding part of the inner shaft and is locked and fixed by a locking nut 402, so that the inner shaft can be driven to rotate by the rotor assembly 3 and output torque outward through the rotating member 4.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the inventive concept and technical solution of the present invention, or the inventive concept and technical solution are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A self-supporting foil winding axial flux motor, characterized in that: The invention comprises a motor shaft (1), a stator assembly (2) and a pair of rotor assemblies (3), wherein the stator assembly (2) is arranged between the pair of rotor assemblies (3), the stator assembly (2) comprises a central hub (5) sleeved on the motor shaft (1), a plurality of stator cores evenly arranged around the central hub (5) and a stator frame sleeved on the outside of all the stator cores, the stator frame and the central hub (5) are fixedly connected via a connecting piece, and the stator core comprises an outer stator pole (201) and an inner stator pole (202). The outer stator pole (201) is wound with a coil on its side to form a stator winding, the inner stator pole (202) is attached to the inner side of the outer stator pole (201), the stator core is fixed between the central hub (5) and the stator frame, the rotor comprises a rotor mounting structure rotatably connected to the central hub (5) via a bearing (304) and rotor poles (301) mounted on the mounting structure and evenly arranged in a circumferential direction, and a rotating member (4) for outputting torque is fixedly connected to the rotor assembly (3).

2. The self-supporting foil winding axial flux motor according to claim 1, characterized in that: The outer side and inner side of the outer stator pole (201) are respectively an outer convex surface and an inner convex surface protruding toward the motor shaft (1); the inner convex surface is located at the center of the stator core; the coil is a foil coil (203) wound around the inner convex surface and the outer convex surface; the outer side and inner side of the inner stator pole (202) are respectively an outer concave surface affixed to the foil coil (203) on the inner convex surface and an inner concave surface affixed to the side of the central hub (5).

3. The self-supporting foil winding axial flux motor according to claim 2, characterized in that: The stator frame comprises an aluminum stator outer ring (204), the inner side of the stator outer ring (204) is provided with a stator slot (2041) matching with the outer coil part of the outer stator pole (201); the stator outer ring (204) is fixedly connected to the central hub (5) via a stator spine (205), and the stator spine (205) comprises an annular disc part (2051) and a spine part (2051) radially extending from the annular disc part (2051). 3), the annular disc portion (2051) is fixedly sleeved with the central hub (5), the spine portion (2053) is correspondingly arranged between two adjacent stator cores, the inner stator pole (202) is provided with a groove, and a slot-shaped opening (2052) that is plugged into and fits with the groove is formed between two adjacent spine portions (2053), and the protruding end of the spine portion (2053) is fixedly connected to the mounting portion (2042) on the inner side of the stator outer ring (204).

4. The self-supporting foil winding axial flux motor according to claim 3, characterized in that: The stator module adopts a structural winding, the connection part of the structural winding is directly bonded and fixed to the central hub (5) and the stator outer ring (204) through an adhesive layer, and the inner cavity accommodating the stator module between the central hub (5) and the stator outer ring (204) is integrally encapsulated by a thermosetting polymer.

5. The self-supporting foil winding axial flux motor according to claim 3, characterized in that: The two end faces of the coil are axially spaced a certain distance from the two corresponding end faces of the stator core. The stator core is provided with a pair of end plates (207) on both sides of the axial direction. The end plates (207) are provided with through slots matching the end faces of the stator core. The two ends of the stator core are exposed from the through slots. The stator core is bonded and fixed to the end plates (207) by an adhesive.

6. The self-supporting foil winding axial flux motor according to any one of claims 1 to 5, characterized in that: The rotor mounting structure comprises a rotor yoke (302) and a rotor fixing ring (303); the rotor yoke (302) is provided with rotor slots corresponding to the rotor magnetic poles (301) one by one; the rotor slots are open in the direction of the stator; the rotor fixing ring (303) is fixed on one side of the rotor slot opening to fix the rotor magnetic pole (301) in the rotor slot; the top of the rotor magnetic pole (301) is exposed from the magnetic pole through slot.

7. The self-supporting foil winding axial flux motor according to claim 6, characterized in that: The rotor magnetic pole (301) comprises a rotor pole upper part (3012) and a rotor pole lower part (3011), the rotor pole upper part (3012) is smaller than the rotor pole lower part (3011), the rotor pole lower part (3011) is embedded in the rotor slot, the rotor fixing ring (303) is provided with a magnetic pole through slot matching the rotor pole upper part (3012), and the top of the rotor pole upper part (3012) is exposed from the magnetic pole through slot.

8. The self-supporting foil winding axial flux motor according to claim 1, characterized in that: A motor mounting structure (2043) for connecting to a vehicle frame or a machine frame is arranged on the outer edge of a stator outer ring (204); the motor shaft (1) is an inner rotating shaft, the inner rotating shaft passes through the center hole of the center hub (5) and can rotate relatively, and the inner rotating shaft extends from the outer end surface of the rotor assembly (3); the rotor assembly (3) is fixed with the rotating member (4) which is key-connected to the inner rotating shaft for transmission.

9. The self-supporting foil winding axial flux motor according to claim 1, characterized in that: A motor mounting structure (2043) for connecting to a vehicle frame or a machine frame is arranged on the protruding portion of a motor shaft (1); the motor shaft (1) is a hollow half shaft; a cable passes through an inner cavity at the center of the motor shaft (1) into the motor; and the rotating member (4) is directly fixed on a plate surface on the outside of the rotor assembly (3).

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