Stator and rotor combined structure and axial flux motor

Abstract

The invention discloses a stator and rotor combined structure and an axial magnetic flux motor, and relates to the technical field of motors, the stator and rotor combined structure comprises two symmetrically arranged stators and a rotor arranged between the two stators, the stators and the rotor have a common rotating axis, each stator comprises a groove-shaped magnetic pole, a stator shaft seat, a magnet yoke support and a winding structure, and the winding structure is arranged in the groove-shaped magnetic pole. The rotor comprises a magnetic conductive iron core and a rotor disc. Most of the existing switched reluctance motors are radial flux motors, so that the diameters of the motors are relatively large; a specific stator and rotor combined structure is adopted, so that the size of the axial magnetic flux motor formed by the stator and rotor combined structure can be reduced; under the condition of the same outer diameter of the motor, the axial magnetic flux motor has larger torque and power, and meanwhile, the stator and rotor combined structure has good heat dissipation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator-rotor combination structure and an axial flux motor. Background Art

[0002] Existing motor heat dissipation is mainly based on improving the heat dissipation capacity of the motor body and the cooling medium, such as increasing the heat transfer coefficient of the motor body surface, increasing the contact area with the cooling medium, etc. Typical methods to improve the motor cooling capacity include increasing the area of ​​the fins on the casing and their number in natural convection in natural cooling to increase the contact surface area between the motor and the ambient air, and improving the design of the cooling pipes of different water / oil cooling to increase the heat transfer coefficient between the motor and the coolant, or increase the contact surface area.

[0003] Although these technical solutions have increased the heat dissipation capacity of the motor to a certain extent, the main factor limiting the service life of the insulating material and the maximum power output value of the motor is still the coil temperature in the slot. If the heat generated in the slot can be effectively exported to the cooling medium to a large extent, the thermal environment of the motor can be greatly improved, thereby greatly improving the service life of the motor and increasing the power output value of the motor; it can also reduce the dependence on water / oil cooling additional equipment. In addition, the motor structure of the present invention has an axial flux feature, which can enhance the air gap flux density compared to the usual radial flux motor. Summary of the invention

[0004] An object of the present invention is to provide a stator-rotor combination structure, wherein a nested winding structure is used in the stator to help dissipate heat from the winding coil, and the rotor also functions as a heat dissipation fan.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The present invention provides a stator-rotor combination structure, which comprises two symmetrically arranged stators and a rotor installed between the two stators, wherein the stator and the rotor have a common rotation axis, and the stator comprises: An even number of slot-type magnetic poles are distributed in a circular array with the rotation axis as the center line, and have a fan-shaped projection on a plane perpendicular to the rotation axis, and have grooves facing the slot-type magnetic poles of the other stator; A stator shaft seat, which is coaxially arranged with the rotating axis and is used for fixing and assembling the yoke bracket and the slot-shaped magnetic pole; A yoke bracket, comprising a cylindrical yoke radially connecting the slot-shaped magnetic pole and the stator shaft seat, and a cylindrical yoke coaxially arranged with the cylindrical yoke; wherein two collinear yoke brackets on the same stator are a yoke bracket group, and the slot-shaped magnetic poles connected thereto are a slot-shaped magnetic pole group; The winding structure includes a coil arranged on each yoke bracket group, wherein the coil is wound on the yoke bracket group under the condition that the direction of the current flowing through the coil remains the same, the coil is fully and evenly wound on each cylindrical yoke and cylindrical yoke in the yoke bracket group, and the coil wound on each yoke bracket group has only one pair of power supply terminals; The rotor comprises: An even number of magnetic conductive cores are distributed in a circular array with the rotation axis as the center line, each magnetic conductive core is vertically penetrated and assembled on the rotor disk, and can sequentially pass through the grooves of the slot-shaped magnetic poles along the rotation trajectory when the rotor disk rotates; The rotor disk can rotate freely around the rotating axis and is provided with a through slot for assembling a magnetic conductive core; a transmission shaft is arranged at the center of the rotor disk, the transmission shaft passes through the rotor disk and rotates synchronously with the rotor disk, and both ends of the transmission shaft pass through the stator shaft seats on both sides of the rotor disk and rotate in cooperation with the stator shaft seats; the rotor disk is provided with ventilation openings facing the stators on both sides thereof along the circumferential direction.

[0006] As a preferred technical solution of the present invention, the central angle of the slot-shaped magnetic pole is 30°, and the angle between adjacent slot-shaped magnetic poles on the same stator is also 30°.

[0007] As a preferred technical solution of the present invention, the groove is in a fan-shaped ring that is concentric with the slot-shaped magnetic pole.

[0008] As a preferred technical solution of the present invention, each of the yoke brackets includes at least one cylindrical yoke coaxially arranged with the cylindrical yoke, and the cylindrical yokes are nested with each other. A threading hole for the coil to pass through is provided at one end of the cylindrical yoke, so that the coil can be fully and evenly wound between the cylindrical yokes or between the cylindrical yoke and the cylindrical yoke.

[0009] As a preferred technical solution of the present invention, the coils wound on the two yoke supports in the same yoke support group are arranged to bypass the stator shaft seat from one side when passing through the stator shaft seat.

[0010] As a preferred technical solution of the present invention, four vents are evenly opened, and each vent has a relative chamfered surface in the circumferential direction of the rotor disk, which can axially push the airflow through the rotor disk when the rotor disk rotates. As a preferred technical solution of the present invention, a rib for limiting the coil is provided at the end of the cylindrical yoke.

[0011] As a preferred technical solution of the present invention, the slot-type magnetic poles, the magnetic yoke bracket and the magnetic conductive core all adopt a layered magnetic isolation design.

[0012] As a preferred technical solution of the present invention, a permanent magnet is fixedly implanted in the magnetic permeable core, and the NS property of the magnetic pole of the permanent magnet is placed opposite to the NS property of the slot-type magnetic pole.

[0013] Another object of the present invention is to provide an axial flux motor, which has the function of reducing coil heating and making the stator have a good heat dissipation structure.

[0014] In order to achieve this object, the present invention adopts the following technical solutions: An axial flux motor comprises the above-mentioned stator-rotor combination structure.

[0015] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. Most of the existing switched reluctance motors are radial flux motors, which make the motor diameter larger; the axial flux switched reluctance motor of the present invention can reduce the size of the motor; under the condition of the same motor outer diameter, the axial flux motor of the present invention has a greater torque.

[0016] 2. The slot-shaped magnetic poles in the present invention enable the motor to have a larger air gap, which can store more energy and make the motor have greater power.

[0017] 3. The present invention has good heat dissipation performance, wherein the rotor disk has a fan heat dissipation function, and the nested winding structure helps to dissipate heat from the coil.

[0018] 4. The present invention adopts a multi-stage nested winding structure, which can maximize the increase of magnetic flux density and strengthen the magnetic field strength on the one hand; on the other hand, it can make full use of the space between the slot-type magnetic poles, and the winding thickness of each stage of the coil is reduced, which is also conducive to improving the heat dissipation effect; and the rotation of the rotor disk is conducive to the introduction of airflow into the gap of the multi-stage nested winding structure, thereby further improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 It is a schematic diagram of the stator-rotor combined structure of the present invention.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the stator.

[0022] Figure 3 It is a schematic diagram of the stator without winding assembly in the present invention.

[0023] Figure 4 It is an overall schematic diagram of the winding structure in the present invention.

[0024] Figure 5 It is a schematic diagram of a single winding structure in the present invention.

[0025] Figure 6 It is a schematic diagram of the current direction in the winding structure.

[0026] Figure 7 It is a schematic diagram of the structure of the rotor in the present invention.

[0027] Figure 8 It is one of the cross-sectional schematic diagrams of the stator and rotor combination in the present invention.

[0028] Fig. 9 This is the second schematic cross-sectional view of the stator and rotor combination in the present invention.

[0029] Fig.10 This is the third schematic cross-sectional view of the stator and rotor combination in the present invention.

[0030] Fig.11 It is a schematic diagram of the layered structure of the yoke bracket and the slot-type magnetic pole in the present invention.

[0031] Fig.12 It is a schematic diagram of the layered structure of the magnetic conductive core in the present invention.

[0032] In the figure: 100, stator, 200, rotor, 300, rotating axis; 110, slot-type magnetic pole, 111, groove, 110S, slot-type magnetic pole group, P1, fan-shaped annular projection, 120, stator shaft seat, 130, yoke bracket, 131, cylindrical yoke, 132, cylindrical yoke, 133, threading hole, 134, rib, 130S, yoke bracket group, 140, winding structure, 141, coil, 142, power terminal; 210, magnetic conductive core, 220, rotor disk, 221, through slot, 222, transmission shaft, 223, vent, 224, magnetic isolation layer. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0036] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0037] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example

[0038] like Figure 1-Figure 12 A stator-rotor combination structure shown in the figure comprises two symmetrically arranged stators 100 and a rotor 200 installed between the two stators 100, wherein the stator 100 and the rotor 200 have a common rotation axis 300, and the stator 100 comprises: An even number of slot-type magnetic poles 110 are distributed in a circular array with the rotation axis 300 as the center line, and have a fan-shaped projection P1 on a plane 400 perpendicular to the rotation axis 300, and have a groove 111 of the slot-type magnetic pole 110 facing the other stator 100; The stator shaft seat 120 is coaxially arranged with the rotating shaft 300 and is used for fixing and assembling the yoke bracket 130 and the slot-shaped magnetic pole 110; The yoke bracket 130 includes a cylindrical yoke 131 radially connecting the slot-shaped magnetic pole 110 and the stator shaft seat 120, and also includes a cylindrical yoke 132 coaxially arranged with the cylindrical yoke 131; wherein two collinear yoke brackets 130 on the same stator are a yoke bracket group 130S, and the slot-shaped magnetic poles connected thereto are the slot-shaped magnetic pole group 110S; The winding structure 140 includes a coil 141 disposed on each yoke support group 130S, wherein the coil 141 is wound on the yoke support group 130S under the condition that the direction of the current flowing through the coil 141 remains the same, and the coil 141 is fully and evenly wound on each cylindrical yoke 132 and cylindrical yoke 131 in the yoke support group 130S, and each coil 141 wound on the yoke support group 130S has only a pair of power terminals 142; It is worth noting that the purpose of winding the coil 141 on the yoke bracket group 130S under the condition of keeping the current direction the same is that, according to the right-hand screw rule, by controlling the direction of the winding structure 140 on the cylindrical yoke 132 and the cylindrical yoke 131, a through magnetic pole with one end as an N pole and the other end as an S pole is formed between the slot-type magnetic pole group 110S after the stator 100 is energized. For details, please refer to Figure 6 shown.

[0039] The rotor 200 comprises: An even number of permeable cores 210 are distributed in a circular array with the rotation axis 300 as the center line. Each permeable core 210 is vertically penetrated and assembled on the rotor disk 220, and can sequentially pass through the grooves 111 of the slot-type magnetic poles 110 along the rotation trajectory when the rotor disk 220 rotates; The rotor disk 220 can rotate freely around the rotating axis 300, and is provided with a through slot 221 for assembling the magnetic core 210; a transmission shaft 222 is arranged at the center of the rotor disk 220, the transmission shaft 222 passes through the rotor disk 220 and rotates synchronously with the rotor disk 220, and both ends of the transmission shaft 222 pass through the stator shaft seat 120 on both sides of the rotor disk 220 and rotate in cooperation with the stator shaft seat 120; the rotor disk 220 is provided with ventilation holes 223 along the circumferential direction toward the stators 100 on both sides thereof.

[0040] The stator 100 of the present invention includes a slot-shaped magnetic pole 110, a yoke bracket 130 and a winding structure 140. When the winding structure 140 is energized, a magnetic field is generated to form a magnetic pole, thereby generating a magnetic force on the permeable core 210 to rotate the rotor disk 220.

[0041] When the magnetic core 210 rotates along with the rotor disk 220 , the magnetic core 210 passes through the groove 111 of the slot-type magnetic pole 110 .

[0042] In a specific embodiment of the present invention, the central angle of the slot-type magnetic pole 110 is 30°, and the angle between adjacent slot-type magnetic poles 110 on the same stator is also 30°, that is, a total of six slot-type magnetic poles 110 are arranged, and the slot-type magnetic poles 110 on the same axis are grouped and marked as three groups, namely slot-type magnetic pole groups 110S. For the convenience of subsequent description, the six slot-type magnetic poles 110 are respectively marked as A1 and A2 (coaxial), B1 and B2 (coaxial), and C1 and C2 (coaxial).

[0043] In the present invention, the winding structure 140 is respectively wound on the yoke bracket group 130S between A1-A2, between B1-B2, and between C1-C2, that is, between A1-A2, between B1-B2, and between C1-C2. By controlling the current in the coil 141 to maintain the same direction, the stator 100 can form through magnetic poles in the directions of A1-A2, B1-B2, and C1-C2, such as Figure 5 as well as Figure 6 As shown, the current flows in from one power terminal 142 and flows out from the other power terminal 142, so that the stator 100 winding structure as a whole forms a magnetic field distribution with an N pole at one end and an S pole at the other end.

[0044] It is worth noting that the groove 111 is in the shape of a fan ring concentric with the slot-type magnetic pole 110, so that a motor air gap is formed between the upper and lower surfaces of the groove 111 and the upper and lower surfaces of the magnetic core 210. The structure of the slot-type magnetic pole 110 enables the motor to have a larger air gap, which can store more energy and make the motor have greater power.

[0045] like Figure 3 and Figure 4 As shown, each of the yoke brackets 130 includes at least one cylindrical yoke 132 coaxially arranged with the cylindrical yoke 131, and the cylindrical yoke 132 and the cylindrical yoke 131 are nested with each other, and one end of the cylindrical yoke 132 is provided with a threading hole 133 for the coil 141 to pass through, so that the coil 141 can be fully and evenly wound between the cylindrical yokes 132 or between the cylindrical yoke 132 and the cylindrical yoke 131, and the end of the cylindrical yoke 132 is provided with a retaining edge 134 for limiting the coil 141.

[0046] like Figure 5 As shown, the coils 141 wound on the two yoke supports 130 in the same yoke support group 130S are arranged to bypass the stator shaft seat 120 from one side when passing through the stator shaft seat 120 .

[0047] like Figure 7As shown, the rotor disk 220 is preferably made of non-magnetic material, and the vents 223 have relative beveled surfaces in the circumferential direction of the rotor disk 220. When the rotor disk 220 rotates clockwise or counterclockwise at high speed, it can promote the airflow movement in the axial direction, so that a penetrating airflow is formed inside the motor to dissipate the heat of the motor, especially the airflow can be introduced between the cylindrical yokes 132, thereby enhancing the heat dissipation of the coil 141.

[0048] Based on the aforementioned structure of the stator 100 that is similar to the "M" shape, the axial airflow passes through the gap in the stator 100 structure, which is beneficial to the heat dissipation of the stator 100 as a whole, and due to the nested winding structure design on the yoke bracket 130, when the axial airflow flows past the cylindrical yoke 131 close to the stator shaft seat 120, according to the Bernoulli principle, the airflow speed here is faster and the pressure is lower, thereby the airflow inside the cylindrical yoke 132 away from the stator shaft seat 120 will be led out; further, the cylindrical yoke 132 is not a closed structure, and a threading hole 133 is provided on it for the coil 141 to pass through. As the airflow is led out, the pressure decreases, and the airflow with slow flow rate and high pressure on the outside of the cylindrical yoke 132 will enter the inside of the cylindrical yoke 132 along the unclosed threading hole 133, thereby forming convection, which can effectively enhance the overall heat dissipation effect of the winding structure 140.

[0049] A magnetic isolation layer 224 is provided at the through slot 221 of the rotor disk 220, which can gather the magnetic lines of force on the magnetic core 210, prevent the magnetic lines of force from entering the rotor disk 220, and reduce magnetic loss. At the same time, a stator bearing is provided in the stator shaft seat 120, and a magnetic isolation layer 224 is also provided between the outer ring of the bearing and the stator shaft seat 120 to prevent the magnetic lines of force from entering the transmission shaft 222.

[0050] In order to form a uniform air gap between the conductive core 210 and the groove 111 when the conductive core 210 passes through the groove 111 of the slot-type magnetic pole 110, the conductive core 210 is configured to be a fan-shaped ring similar to the groove 111. The curvature of each conductive core 210 is 30°, and the conductive cores 210 are spaced 60° apart, that is, there are four conductive cores 210 in the circumferential direction. For the sake of convenience, they are respectively labeled a, b, c, and d.

[0051] In order to further reduce eddy current losses, the slot-type magnetic pole 110 , the magnetic yoke bracket 130 and the magnetic permeable core 210 all adopt a layered magnetic isolation design.

[0052] When the winding structures 140 on the two stators A1-A2, B1-B2, and C1-C2 are energized in sequence, NS pole magnetic fields will be formed in sequence on A1-A2, B1-B2, and C1-C2. Figure 8 , Fig. 9 and Fig.10As shown in the stator and rotor cross-section diagram, taking the rotor movement direction as an example, according to the principle of the shortest magnetic line of force, at a certain moment Figure 8 As shown, the windings C1-C2 are energized to generate magnetic force on the b and d permeable cores, causing the rotor 200 to rotate in the direction shown in the figure; at the next moment, Fig. 9 As shown, winding B1-B2 is energized to generate magnetic force on the a and c permeable cores, causing the rotor 200 to continue rotating in the direction shown in the figure; at the next moment, as shown in Fig.10 As shown, the winding A1-A2 is energized to generate magnetic force on the b and d permeable cores, so that the rotor 200 keeps rotating in the direction shown in the figure; at the next moment, it returns to Figure 8 The state is repeated over and over again, and the rotor 200 continues to rotate under the action of the rotating magnetic fields of the two stators 100.

[0053] If the rotor 200 is pressed Figure 8 The principle is the same as that of the reverse direction, which only needs to be energized in the order of B1-B2, C1-C2, and A1-A2. Therefore, the present invention can control the energization sequence of the winding structure 140 to make the motor generate forward and reverse motion.

[0054] In fact, when the slot-type magnetic pole 110 in the present invention cooperates with the permeable core 210, the three surfaces of the groove 111 of the slot-type magnetic pole 110 will generate air gaps with the permeable core 210 passing through. Compared with the conventional switched reluctance motor, which only generates a single-sided air gap between the rotor salient pole (top surface) and the magnetic pole, the three-sided air gap structure of the present invention can store more energy and make the motor have greater power. In addition, the slot-type magnetic pole 110 has a larger internal and external surface area, which is also conducive to heat dissipation. When the permeable core 210 passes through the groove 111 of the slot-type magnetic pole 110 at high speed, it also has the effect of accelerating air diversion and heat dissipation.

[0055] In the embodiment of the present invention, a permanent magnet 211 is fixedly implanted in the permeable core 210, and the magnetic pole NS property of the permanent magnet 211 is placed opposite to the NS property of the slot-type magnetic pole, so as to enhance the magnetic flux density and magnetic field strength in the permeable core 210, and the motor can become a permanent magnet motor. Example

[0056] An embodiment of the present invention further provides an axial flux motor, comprising the stator-rotor combination structure of embodiment 1.

[0057] All thread designs and parts that cooperate with threads in this article, in addition to the functions of connection and fixing, also have the function of combining and installing parts so that the motor as a whole can be assembled smoothly.

[0058] In the motor, the relevant structural dimensions of the stator and the rotor can be adjusted as needed to meet the requirements of installation in spaces of different sizes.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stator-rotor combination structure, comprising two symmetrically arranged stators and a rotor installed between the two stators, characterized in that: The stator and the rotor have a common rotation axis, and the stator comprises: An even number of slot-type magnetic poles are distributed in a circular array with the rotation axis as the center line, and have a fan-shaped projection on a plane perpendicular to the rotation axis, and have grooves facing the slot-type magnetic poles of the other stator; A stator shaft seat, which is coaxially arranged with the rotating axis and is used for fixing and assembling the yoke bracket and the slot-shaped magnetic pole; A yoke bracket, comprising a cylindrical yoke radially connecting the slot-shaped magnetic pole and the stator shaft seat, and a cylindrical yoke coaxially arranged with the cylindrical yoke; wherein two collinear yoke brackets on the same stator are a yoke bracket group, and the slot-shaped magnetic poles connected thereto are a slot-shaped magnetic pole group; The winding structure includes a coil arranged on each yoke bracket group, wherein the coil is wound on the yoke bracket group under the condition that the direction of the current flowing through the coil remains the same, the coil is fully and evenly wound on each cylindrical yoke and cylindrical yoke in the yoke bracket group, and the coil wound on each yoke bracket group has only one pair of power supply terminals; The rotor comprises: An even number of magnetic conductive cores are distributed in a circular array with the rotation axis as the center line, each magnetic conductive core is vertically penetrated and assembled on the rotor disk, and can sequentially pass through the grooves of the slot-shaped magnetic poles along the rotation trajectory when the rotor disk rotates; The rotor disk can rotate freely around the rotating axis and is provided with a through slot for assembling a magnetic conductive core; a transmission shaft is arranged at the center of the rotor disk, the transmission shaft passes through the rotor disk and rotates synchronously with the rotor disk, and both ends of the transmission shaft pass through the stator shaft seats on both sides of the rotor disk and rotate in cooperation with the stator shaft seats; the rotor disk is provided with ventilation openings facing the stators on both sides thereof along the circumferential direction.

2. The stator-rotor combination structure according to claim 1, characterized in that: The center angle of the slot-shaped magnetic pole is 30°, and the angle between adjacent slot-shaped magnetic poles on the same stator is also 30°.

3. The stator-rotor combination structure according to claim 1, characterized in that: The groove is in a fan-shaped ring shape concentric with the slot-shaped magnetic pole.

4. The stator-rotor combination structure according to claim 1, characterized in that: Each of the yoke brackets includes at least one cylindrical yoke coaxially arranged with the cylindrical yoke, and the cylindrical yokes are nested with each other. A threading hole for the coil to pass through is opened at one end of the cylindrical yoke, so that the coil can be fully and evenly wound between the cylindrical yokes or between the cylindrical yoke and the cylindrical yoke.

5. The stator-rotor combination structure according to claim 4, characterized in that: The coils wound on the two yoke supports in the same yoke support group are arranged to bypass the stator shaft seat from one side when passing through the stator shaft seat.

6. The stator-rotor combination structure according to claim 1, characterized in that: Four ventilation openings are evenly arranged, and each ventilation opening has a relative oblique cut surface in the circumferential direction of the rotor disk, so that when the rotor disk rotates, the airflow can be axially pushed to penetrate the rotor disk.

7. The stator-rotor combination structure according to claim 1, characterized in that: The end of the cylindrical magnetic yoke is provided with a rib for limiting the coil.

8. The stator-rotor combination structure according to claim 1, characterized in that: The slot-shaped magnetic poles, the magnetic yoke bracket and the magnetic permeable core all adopt a layered magnetic isolation design.

9. The stator-rotor combination structure according to claim 1, characterized in that: A permanent magnet is fixedly implanted in the magnetic permeable core, and the NS property of the magnetic pole of the permanent magnet is opposite to the NS property of the slot-type magnetic pole.

10. An axial flux motor, characterized in that: The invention comprises the stator-rotor combination structure as described in any one of claims 1 to 8.

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