Axial flux motor stator, axial flux induction motor and preparation method thereof

Abstract

The invention provides an axial magnetic flux motor stator, an axial magnetic flux induction motor and a preparation method thereof, the axial magnetic flux motor stator comprises a stator disc, the stator disc is made of a heat conduction material, the stator disc is provided with a stator bearing chamber and a plurality of accommodating holes which are uniformly arranged at intervals around the stator bearing chamber, and each accommodating hole is internally provided with a solid stator winding. The solid stator windings are formed by winding multiple layers of enameled wires from inside to outside, and the magnetic flux direction of each solid stator winding is parallel to the axial direction of the stator disc. Each stator winding on the stator disc is a cylindrical solid coil formed by surrounding multiple layers from inside to outside, so that the amount of air in gaps among the enameled wires is extremely small or even no, an efficient heat-conducting whole is formed, the stator disc can enlarge the heat dissipation area of each solid stator winding, and the heat dissipation efficiency of the stator disc is improved. The heat dissipation efficiency of each winding can be further improved, the winding temperature rise is effectively reduced, the winding insulation aging is prevented, and the service life, the torque and the efficiency of the motor are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor design and manufacturing, and in particular relates to an axial flux motor stator, an axial flux induction motor and a preparation method thereof. Background Art

[0002] The working principle of the induction motor is based on the law of electromagnetic induction. It consists of two parts: the stator and the rotor. The alternating current in the stator coil generates a rotating magnetic field, which in turn generates an induced current in the rotor, and finally drives the rotor to rotate. Generally speaking, the stator is the stationary part of the motor (electric motor), including the stator core, windings and base. When the AC power supply is connected to these windings, a rotating magnetic field will be formed in the windings. The rotor is the rotating part of the motor, usually composed of a rotor core and conductor bars. These conductor bars are usually made of good conductive materials such as aluminum or copper and fixed on the rotor core. When the rotating magnetic field passes through the conductor bars of the rotor, an induced electromotive force is generated in the conductor bars, and then a current is generated. Since the current in the conductor bars will be affected by the electromagnetic force, the rotor will be affected by a certain torque and start to rotate. Induction motors have the advantages of simple structure, high reliability and stable operation, so they are widely used in various industrial and civilian fields. However, the structural disadvantages of induction motors in the prior art are also relatively obvious, for example:

[0003] (1) The stator and rotor cores of the induction motor are provided with slots, and the windings or bars are arranged in the slots. The slot structure will cause torque pulsation, resulting in large vibration and noise. In addition, due to the existence of the stator core and the rotor core, the weight of the motor becomes larger, resulting in a large amount of material consumption and high manufacturing cost.

[0004] (2) When the induction motor is connected to an AC power supply, its stator winding carries high voltage and high current and is directly exposed to the alternating magnetic field, which is prone to high temperature rise. The temperature rise will increase the DC resistance of the stator and increase the loss, which will further increase the temperature rise. If the motor is operated in this state for a long time, the insulation aging of the stator winding will be accelerated and the motor will be damaged. Therefore, in the long-term operation of the motor, the heat dissipation efficiency is not only related to the life of the motor, but is also often the most important limiting factor for the motor's performance such as torque and efficiency.

[0005] In the related art, a common method for improving the winding temperature of an ironless motor with an axial magnetic field (i.e., axial magnetic flux) is to pot the stator winding with a thermally conductive insulating potting compound. This method can improve the heat dissipation of the winding, but because the thermal conductivity of the potting compound is not high, the high temperature rise of the stator winding is limited after the motor stator winding is potted. Some prior arts also propose to set a circulating water channel along the axial outer casing of the motor to reduce the temperature rise of the winding, but because its heat exchange efficiency is not high, it is difficult to eliminate the winding heat in the stator component, and the heat dissipation capacity is relatively weak. In addition, this method increases the effective axial size of the stator winding, which increases the manufacturing cost and volume of the motor. Summary of the invention

[0006] Therefore, the present invention provides an axial flux motor stator, an axial flux induction motor and a preparation method thereof, which can overcome the technical problem in the related art that the stator winding in the axial flux induction motor has insufficient heat dissipation, resulting in accelerated insulation aging of the stator winding, reducing the motor service life, motor torque and motor efficiency.

[0007] In order to solve the above problems, the present invention provides an axial flux motor stator, including a stator disk, the material of the stator disk is a heat-conductive material, the stator disk has a stator bearing chamber and a plurality of accommodating holes evenly spaced around the stator bearing chamber, each of the accommodating holes is provided with a solid stator winding, the solid stator winding is formed by multiple layers of enameled wire wrapped from the inside to the outside, and the magnetic flux direction of each of the solid stator windings is parallel to the axial direction of the stator disk.

[0008] In some embodiments, the thermally conductive material is an injection molding material or an epoxy resin; or, the stator disk has a base portion.

[0009] In some embodiments, the stator disk and the solid stator winding are integrally formed by potting with the thermally conductive material.

[0010] The present invention also provides an axial flux induction motor, comprising a motor stator, a rotating shaft, and a motor rotor located on one side of the end surface of the motor stator, wherein the motor rotor is mounted on the rotating shaft, and the rotating shaft passes through and is rotatably supported in the stator bearing chamber of the motor stator, and a stator-rotor air gap is formed between the motor stator and the motor rotor, and the motor stator is the above-mentioned axial flux motor stator.

[0011] In some embodiments, the motor rotor is composed of a conductive wheel fixedly mounted on the rotating shaft, and the conductive wheel is composed of an inner ring mounted on the rotating shaft, an outer ring concentrically spaced apart from the inner ring, and a plurality of radially spaced conductive bars connected between the inner ring and the outer ring.

[0012] In some embodiments, each of the guide bars is a fan blade structure to drive the airflow toward the motor stator when the motor rotor rotates.

[0013] In some embodiments, a convex ring extending along the axial direction of the inner ring is formed on an end surface of the inner ring facing the motor stator, and an end surface of the convex ring abuts against an axial end surface of the stator disk.

[0014] In some embodiments, the motor rotors include two groups, the two groups of motor rotors are respectively located at two ends of the motor stator and share the rotating shaft; and / or the conductive wheel is formed by injection molding of a conductive material.

[0015] The present invention also provides a method for preparing the axial flux induction motor as described above, comprising the following steps:

[0016] The motor stator preparation step includes winding to form solid stator windings, placing the solid stator windings at corresponding positions of the stator disk forming cavity, and then injecting a heat conductive material into the stator disk forming cavity to form the solid motor stator;

[0017] The motor rotor preparation step includes injecting liquid conductive material into the conductive wheel molding cavity to integrally mold the motor rotor;

[0018] The stator and rotor assembly steps include: after the bearings are installed in the stator bearing chamber of the stator disk, the two motor rotors are respectively placed at the two ends of the motor stator and stacked coaxially, and the rotating shaft is pressed into the shaft along the axial direction of the motor stator and the motor rotor.

[0019] In some embodiments, the solid stator winding is formed by winding in the following manner:

[0020] Prepare a winding tool, the winding tool comprising a drive needle and a front baffle and a rear baffle respectively connected to two ends of the drive needle;

[0021] The ends of the enameled wires are fixed on the end fixing structure of the winding tool, and the winding tool is driven to rotate a predetermined number of turns around the central axis of the drive needle, and then the winding tool is disassembled to form the solid stator winding.

[0022] The present invention provides an axial flux motor stator, an axial flux induction motor and a preparation method thereof, which have the following beneficial effects:

[0023] The stator disk made of heat-conducting material serves as a loading carrier for each stator winding, so that the motor stator objectively has no stator core, and thus the torque pulsation caused by the tooth slot structure of the stator core arranged in the motor stator can be eliminated, thereby reducing the vibration noise during the operation of the motor; more importantly, each stator winding on the stator disk is a cylindrical solid coil formed by multiple layers from the inside to the outside. Since the multiple layers of coils are tightly wound in close contact with each other, the amount of air in the gap between each strand of enameled wire can be very small or even non-existent, thereby forming an efficient heat-conducting whole. At the same time, the stator disk made of heat-conducting material can further expand the heat dissipation area of ​​each solid stator winding while serving as the installation carrier of each winding, and can further improve the heat dissipation efficiency of each winding. In this way, the temperature rise of the winding during the operation of the motor can be effectively reduced, and the insulation aging of the winding caused by the temperature rise can be effectively prevented. While improving the life of the motor, the torque and efficiency of the motor can also be improved;

[0024] The stator disk and the solid stator winding are encapsulated and formed into one body by the heat conductive material, so that the heat conductive material can completely wrap the solid stator winding. Due to the encapsulation molding method, the liquid heat conductive material can also fill the gaps that may exist in the solid stator winding during the winding process, further ensuring the heat dissipation effect of the stator disk on each solid stator winding;

[0025] Since the motor rotor objectively has no rotor core, the torque pulsation caused by the tooth slot structure of the rotor core arranged in the motor rotor can be eliminated, thereby reducing the vibration noise during the operation of the motor, which can also further reduce the overall weight and manufacturing cost of the motor;

[0026] Each guide bar on the conductive wheel is designed as a fan blade structure. When the motor rotor rotates, it can transmit power outward while also directing the surrounding airflow toward the motor stator, thereby forming an air cooling effect on the motor stator, which can further improve the heat dissipation effect of the motor stator;

[0027] The width of the stator-rotor air gap can be determined by the thickness of the convex ring, thereby ensuring the stability of the stator-rotor air gap width;

[0028] When the two sets of motor rotors rotate synchronously, the two sets of motor rotors drive the airflow to flow toward the motor stator, thereby further improving the cooling and heat dissipation effect on the motor stator. At the same time, since two sets of motor rotors are used, the torque of the motor can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0030] Figure 1 1 is a schematic diagram of the three-dimensional structure of the stator of the axial flux motor in an embodiment of the present invention (partial cross-section);

[0031] Figure 2 is a schematic diagram of the three-dimensional structure of the axial flux induction motor in an embodiment of the present invention;

[0032] Figure 3 yes Figure 2 A partial cross-sectional view of an axial flux induction motor;

[0033] Figure 4 yes Figure 2 Right side view of the axial flux induction motor in;

[0034] Figure 5 yes Figure 2 Schematic diagram of the three-dimensional structure of the motor rotor;

[0035] Figure 6 yes Figure 5 A partial cross-sectional view of a motor rotor in FIG.

[0036] Figure 7 yes Figure 1 Schematic diagram of the state of the solid stator winding on the winding tooling;

[0037] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure of the winding tooling;

[0038] Fig. 9 It is a schematic diagram of the distribution principle of the solid stator winding on the motor stator in the present invention.

[0039] The accompanying drawings are marked as follows:

[0040] 100. Motor stator; 1. Stator disk; 11. Stator bearing chamber; 12. Base; 121. Mounting hole; 13. Coil terminal; 2. Solid stator winding; 200. Rotating shaft; 300. Motor rotor; 301. Conductive wheel; 3011. Inner ring; 3012. Outer ring; 3013. Guide bar; 3014. Convex ring; 400. Winding tooling; 401. Drive needle; 402. Front baffle; 403. Rear baffle; 404. Thread end fixing structure; 405. Thread tail fixing structure; 406. Thread end through hole; 407. Winding rotation drive end; 500. Bearing; 600. Retaining ring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, an axial flux motor stator is provided, including a stator disk 1, wherein the material of the stator disk 1 is a heat-conducting material, the stator disk 1 has a stator bearing chamber 11 and a plurality of accommodating holes (not marked in the figure) evenly spaced around the stator bearing chamber 11, each of the accommodating holes is provided with a solid stator winding 2, the solid stator winding 2 is formed by multiple layers of enameled wire wrapped from the inside to the outside, and the magnetic flux direction of each of the solid stator windings 2 is parallel to the axial direction of the stator disk 1.

[0046] In this technical solution, the stator disk 1 made of heat-conductive material serves as a loading carrier for each stator winding, so that the motor stator objectively has no stator core, and thus the torque pulsation caused by the tooth slot structure of the stator core arranged in the motor stator can be eliminated, thereby reducing the vibration noise during the operation of the motor; more importantly, each stator winding on the stator disk 1 is a cylindrical solid coil formed by multiple layers from the inside to the outside. Since the multiple layers of coils are tightly wound in close contact with each other, the amount of air in the gaps between each strand of enameled wire can be very small or even non-existent, thereby forming an efficient heat-conducting whole. At the same time, the stator disk 1 made of heat-conductive material can further expand the heat dissipation area of ​​each solid stator winding 2 while serving as a mounting carrier for each winding, and can further improve the heat dissipation efficiency of each winding. In this way, the temperature rise of the winding during the operation of the motor can be effectively reduced, and the insulation aging of the winding caused by the temperature rise can be effectively prevented. While improving the life of the motor, the torque and efficiency of the motor can also be improved.

[0047] In some embodiments, the thermally conductive material is an injection molding material or epoxy resin. Specifically, the aforementioned injection molding material may be PBT (polybutylene terephthalate) plastic. These materials have high thermal conductivity and relatively low density, which can effectively reduce the overall mass of the motor stator. Moreover, the material price is relatively cheap, which can significantly reduce the overall manufacturing cost of the motor.

[0048] See Figure 1 As shown, the stator disc 1 has a base portion 12, which is generally a pedestal structure, and is formed with corresponding mounting holes 121, so that it can be removably assembled with an external carrier by using these mounting holes 121. The base portion 12 is also provided with corresponding coil terminals 13, so as to form an electrical connection with an external power line through these coil terminals 13.

[0049] In some embodiments, the stator disk 1 and the solid stator winding 2 are encapsulated and molded into one body using the thermally conductive material, so that the thermally conductive material can completely wrap the aforementioned solid stator winding 2. Due to the use of the encapsulation molding method, the liquid thermally conductive material can also fill the gaps that may exist in the solid stator winding 2 during the winding process (for example, the position of the transmission needle 401 mentioned later), further ensuring the heat dissipation effect of the stator disk 1 on each solid stator winding 2.

[0050] See Fig. 9As shown, in a specific embodiment of the present invention, four solid stator windings 2 are used, including two main phase windings and two auxiliary phase windings. The number of the main phase windings is the same as the number of windings of the auxiliary phase windings. The two are arranged alternately and symmetrically, and the adjacent windings of the same phase are wound in opposite directions. In addition, the solid stator windings 2 are independent of each other and can be wound at the same time, thereby improving the winding efficiency.

[0051] According to the embodiments of the present invention, specifically referring to Figures 2 to 4 As shown, an axial flux induction motor is also provided, comprising a motor stator 100, a rotating shaft 200, and a motor rotor 300 located on one side of the end surface of the motor stator 100, wherein the motor rotor 300 is sleeved on the rotating shaft 200, and the rotating shaft 200 passes through and is rotatably supported in the stator bearing chamber 11 of the motor stator 100, and a stator-rotor air gap (such as Figure 3 ), the motor stator 100 is the above-mentioned axial flux motor stator.

[0052] See Figure 5 As shown, in some embodiments, the motor rotor 300 is composed of a conductive wheel 301 fixedly mounted on the rotating shaft 200, and the conductive wheel 301 is composed of an inner ring 3011 mounted on the rotating shaft 200, an outer ring 3012 concentrically spaced from the inner ring 3011, and a plurality of radially spaced conductive bars 3013 connected between the inner ring 3011 and the outer ring 3012. That is, the motor rotor in the present invention objectively does not use a rotor core.

[0053] In this technical solution, since the motor rotor 300 objectively has no rotor core, the torque pulsation caused by the tooth slot structure of the rotor core arranged in the motor rotor can be eliminated, thereby reducing the vibration noise during the operation of the motor, which can also further reduce the overall weight and manufacturing cost of the motor.

[0054] As a preferred implementation, each of the guide bars 3013 is a fan blade structure to drive the airflow toward the motor stator 100 when the motor rotor 300 rotates.

[0055] In this technical solution, each guide bar 3013 on the conductive wheel 301 is designed as a fan blade structure. When the motor rotor 300 rotates, it can transmit power outward while also directing the surrounding airflow toward the side of the motor stator 100, thereby forming an air cooling effect on the motor stator 100, which can further enhance the heat dissipation effect of the motor stator 100.

[0056] See Figure 6As shown, the connection position between the guide bar 3013 and the inner ring 3011 is the blade root, and the connection position between the guide bar 3013 and the outer ring 3012 is the blade tip. In order to ensure that the airflow can be driven to flow to the side of the motor stator 100 when the conductive wheel 301 rotates, the fan blade structure formed by the guide bar 3013 should have a certain inclination angle ( Figure 6 α in the figure), the size of the aforementioned inclination angle can be reasonably selected according to the heat dissipation requirements. Specifically, when the conductive wheel 301 rotates, it can generate a thrust effect on the air in front, that is, push the air forward to form an airflow. The inclination of the aforementioned guide bar 3013 ensures that most of the airflow is effectively directed to the front, thereby generating a significant wind force on the side of the guide bar 3013 facing the motor stator 100. At the same time, the air behind the guide bar 3013 (that is, the side away from the motor stator 100) is sucked in due to the local vacuum effect (low pressure area) formed by the rotation of the guide bar 3013, thereby maintaining the continuity of the air flow, thereby effectively dissipating the heat in real time, reducing motor losses, and improving motor efficiency.

[0057] In some embodiments, a convex ring 3014 extending along the axial direction of the inner ring 3011 is formed on the end surface of the inner ring 3011 facing the motor stator 100 , and the end surface of the convex ring 3014 abuts against the axial end surface of the stator disk 1 .

[0058] In this technical solution, the width of the stator-rotor air gap can be determined by the thickness of the convex ring 3014, thereby ensuring the stability of the stator-rotor air gap width.

[0059] The convex ring 3014 can be symmetrically arranged on the end faces of the opposite sides of the inner ring 3011. In order to reduce the friction wear between the convex ring 3014 and the motor stator 100, in actual application, a corresponding wear-resistant sheet can be arranged between the matching surfaces of the motor stator 100 and the convex ring 3014, or a wear-resistant layer can be arranged on at least one matching surface of the two.

[0060] In some embodiments, the motor rotor 300 has two groups, and the two groups of motor rotors 300 are respectively located at the two ends of the motor stator 100 and share the rotating shaft 200. Specifically, the two groups of motor rotors 300 are arranged radially about the left and right sides of the motor stator 100. In this way, when the two groups of motor rotors 300 rotate synchronously, the two groups of motor rotors 300 drive the airflow to flow toward the motor stator 100, thereby further improving the cooling and heat dissipation effect of the motor stator 100. At the same time, since two groups of motor rotors 300 are used, the torque of the motor can be improved.

[0061] In some embodiments, the conductive wheel 301 is formed by injection molding of a conductive material, such as copper or aluminum.

[0062] In this technical solution, the conductive wheel 301 is formed by injection molding of a conductive material, which can improve material utilization and simplify the manufacturing process of the conductive wheel 301 .

[0063] According to an embodiment of the present invention, there is also provided a method for preparing the axial flux induction motor as described above, comprising the following steps:

[0064] The motor stator preparation step is to wind each solid stator winding 2, place each solid stator winding 2 at a corresponding position of a stator disk forming cavity, and then inject a heat conductive material into the stator disk forming cavity to form a solid motor stator 100;

[0065] The motor rotor preparation step is to inject liquid conductive material into the conductive wheel molding cavity to integrally mold the motor rotor 300;

[0066] The stator and rotor assembly steps are as follows: after the bearing 500 is installed in the stator bearing chamber 11 of the stator disk 1, the two motor rotors 300 are respectively placed at the two ends of the motor stator 100 and coaxially stacked, and the rotating shaft 200 is pressed into the shaft along the axial direction of the motor stator 100 and the motor rotor 300. In this embodiment, the inner ring of the aforementioned bearing 500 and the inner ring 3011 of the two motor rotors 300, that is, the conductive wheel 301, are all interference fit with the rotating shaft 200.

[0067] In this technical solution, the aforementioned motor stator preparation step and motor rotor preparation step can be performed in parallel to improve the motor preparation efficiency.

[0068] In some embodiments, the solid stator winding 2 is formed by winding in the following manner:

[0069] Prepare winding tool 400, see Figure 7 and Figure 8 As shown, the winding tool 400 includes a drive pin 401 and a front baffle 402 and a rear baffle 403 respectively connected to the two ends of the drive pin 401. In order to ensure the solidity of the solid stator winding 2 after winding, the diameter of the drive pin 401 should be as small as possible under the premise of meeting the mechanical stiffness. The annular gap between the front baffle 402 and the rear baffle 403 forms a space for layered winding of the enameled wire. In order to improve the winding efficiency, two coils of the same phase can be synchronously wound using two identical winding tools 400 (winding in opposite directions).

[0070] The end of the enameled wire is fixed on the end fixing structure 404 of the winding tool 400. The end fixing structure 404 can be specifically a winding column formed on the outer end surface of the front baffle 402, which should be as close to the position of the transmission needle 401 as possible. At this time, the front baffle 402 is constructed with a end through hole 406 that passes through the inside and outside of the front baffle 402. A winding rotation drive end 407 is coaxially arranged on the outside of the rear baffle 403 and the transmission needle 401. The rotating shaft of the winding rotation mechanism is fixedly connected to the winding rotation drive end 407 to drive the winding tool 400 to rotate a predetermined number of turns around the central axis of the transmission needle 401. After that, the winding tool 400 is disassembled to form the solid stator winding 2.

[0071] In other embodiments, a wire tail fixing structure 405 (for example, also a winding post) may be provided on the rear baffle 403 to fix the wire tail of the solid stator winding 2 formed by winding, thereby ensuring the morphological stability of the stator winding after winding.

[0072] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An axial flux motor stator, characterized in that: The invention comprises a stator disk (1), wherein the material of the stator disk (1) is a heat-conducting material, the stator disk (1) has a stator bearing chamber (11) and a plurality of accommodating holes evenly spaced around the stator bearing chamber (11), each of the accommodating holes is provided with a solid stator winding (2), the solid stator winding (2) is formed by a plurality of enameled wires wound from the inside to the outside, and the magnetic flux direction of each of the solid stator windings (2) is parallel to the axial direction of the stator disk (1).

2. The axial flux motor stator according to claim 1, characterized in that: The heat-conducting material is an injection molding material or an epoxy resin; or, the stator disk (1) has a base portion (12).

3. The axial flux motor stator according to claim 2, characterized in that: The stator disc (1) and the solid stator winding (2) are integrally formed by encapsulating with the heat-conducting material.

4. An axial flux induction motor, characterized in that: The invention comprises a motor stator (100), a rotating shaft (200), and a motor rotor (300) located on one side of the end surface of the motor stator (100), wherein the motor rotor (300) is mounted on the rotating shaft (200), and the rotating shaft (200) passes through and is rotatably supported in the stator bearing chamber (11) of the motor stator (100), and a stator-rotor air gap is formed between the motor stator (100) and the motor rotor (300), and the motor stator (100) is an axial flux motor stator according to any one of claims 1 to 3.

5. The axial flux induction motor according to claim 4, characterized in that: The motor rotor (300) is composed of a conductive wheel (301) fixedly mounted on the rotating shaft (200); the conductive wheel (301) is composed of an inner ring (3011) mounted on the rotating shaft (200), an outer ring (3012) arranged concentrically with the inner ring (3011) and spaced apart, and a plurality of radially spaced conductive bars (3013) connected between the inner ring (3011) and the outer ring (3012).

6. The axial flux induction motor according to claim 5, characterized in that: Each of the guide bars (3013) is a fan blade structure, so as to drive the airflow to flow toward the motor stator (100) when the motor rotor (300) rotates.

7. The axial flux induction motor according to claim 5, characterized in that: A convex ring (3014) extending along the axial direction of the inner ring (3011) is formed on the end surface of one side of the inner ring (3011) facing the motor stator (100), and the end surface of the convex ring (3014) abuts against the axial end surface of the stator disk (1).

8. The axial flux induction motor according to claim 5, characterized in that: The motor rotors (300) have two groups, and the two groups of motor rotors (300) are respectively located at two ends of the motor stator (100) and share the rotating shaft (200); and / or the conductive wheel (301) is formed by injection molding of a conductive material.

9. A method for preparing an axial flux induction motor as claimed in any one of claims 4 to 8, comprising the following steps: A motor stator preparation step, winding to form solid stator windings (2), placing each solid stator winding (2) at a corresponding position of a stator disk forming cavity, and then injecting a heat conductive material into the stator disk forming cavity to form a solid motor stator (100); A motor rotor preparation step, injecting liquid conductive material into a conductive wheel molding cavity, and integrally injection molding the motor rotor (300); The stator and rotor assembly steps include: after the bearing (500) is installed in the stator bearing chamber (11) of the stator disk (1), two motor rotors (300) are respectively placed at the two ends of the motor stator (100) to form a coaxial stack, and the rotating shaft (200) is pressed into the shaft along the axial direction of the motor stator (100) and the motor rotor (300).

10. The method for preparing an axial flux induction motor according to claim 9, characterized in that: The solid stator winding (2) is formed by winding in the following manner: Prepare a winding tool (400), the winding tool (400) comprising a drive needle (401) and a front baffle plate (402) and a rear baffle plate (403) respectively connected to two ends of the drive needle (401); The ends of the enameled wires are fixed to the end fixing structure (404) of the winding tool (400), and the winding tool (400) is driven to rotate a predetermined number of turns around the central axis of the drive needle (401), and then the winding tool (400) is disassembled to form the solid stator winding (2).

Images