Axial field motor rotor structure

Abstract

The present application relates to axial magnetic field motor, especially to a kind of axial magnetic field motor rotor structure, including rotor core, the rotor core is provided with multiple tooth parts;Excitation winding, the excitation winding includes several coils, the coil is covered in the side of the tooth part;Damping winding, the damping winding includes multiple radially arranged damping bars and circumferentially arranged inner ring body, outer ring body, at least one of the multiple damping bars is closed loop with another by the inner ring body, outer ring body, and the damping winding is installed at the top of the tooth part. By arranging damping winding at the top of tooth part, the impact on stator winding is reduced, and the ability of motor to resist unbalanced load is increased.

Description

Technical Field

[0001] This invention relates to the field of axial magnetic field motors, and more particularly to a rotor structure for an axial magnetic field motor. Background Technology

[0002] Axial field motors, also known as disc motors, have advantages such as small axial dimensions, high torque density, high power density, and high efficiency, and are widely used in electric vehicles, general industrial applications, and household appliances. The rotor and stator of an axial field motor are parallel, forming an air gap between them.

[0003] The stator of an axial magnetic field motor consists of a stator core and stator windings wound around it, while the rotor consists of a rotor core and excitation components. When the load changes, the voltage and current within the windings oscillate, necessitating measures to minimize the impact on the stator windings. Therefore, proper arrangement of these windings is a critical technical challenge. Furthermore, harmonic magnetic fields can induce eddy currents in the rotor core, leading to overall heat loss and even demagnetization of the permanent magnets, resulting in decreased motor performance or even complete inoperability. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a rotor structure with excitation windings and damping windings. By setting the excitation windings on the side of the teeth, compared to permanent magnet excitation, not only can excitation be controlled, but there is also no risk of permanent magnet demagnetization. By arranging the damping windings at the top of the teeth, the impact on the stator windings is reduced, enhancing the dynamic response performance of the motor. The combined rotor core structure not only solves the problems of placement and fixing of the excitation windings and damping windings, but also effectively reduces the loss of the rotor core.

[0005] This invention provides an axial magnetic field motor rotor structure, comprising: A rotor core, wherein the rotor core is provided with multiple teeth; An excitation winding, comprising a plurality of coils, wherein the coils are sleeved on the side of the teeth; The damping winding includes multiple radially arranged damping bars and an inner ring and an outer ring arranged circumferentially. At least one of the multiple damping bars forms a closed loop with another bar through the inner ring and the outer ring. The damping winding is mounted on the top of the tooth.

[0006] In a preferred embodiment, the rotor core includes: The first iron core includes a plurality of first teeth, which are arranged circumferentially at intervals, and an opening is provided at one end of the first teeth in the axial direction. The second iron core includes a plurality of second teeth; A coil is respectively sleeved on the outer periphery of each of the first teeth, the second teeth are received within the first teeth through the opening, and the coil is confined between the first iron core and the second iron core.

[0007] In a preferred embodiment, the second tooth includes an electrode body and an electrode shoe that are in contact with each other, the electrode body being housed within the first tooth and the electrode shoe being exposed outside the first tooth; Alternatively, the second tooth may include an electrode body that is housed within the first tooth.

[0008] In a preferred embodiment, the first core further includes a yoke, the first tooth is connected to the yoke, and the yoke is located at the end of the first tooth that is away from the opening.

[0009] In a preferred embodiment, the pole shoe extends to the outer periphery of the first tooth so that the coil of the excitation winding is confined between the pole shoe and the yoke.

[0010] In a preferred embodiment, a mounting surface is provided on the top of the tooth, and the damping winding is embedded in the mounting surface.

[0011] In a preferred embodiment, a plurality of damping holes are provided on the mounting surface, the damping holes penetrate the toothed portion radially, and the damping guide strip is installed in the damping holes.

[0012] As a preferred embodiment The inner ring and the outer ring are respectively disposed on both radial sides of the second tooth, and the damping guide bar is connected between the inner ring and the outer ring; Alternatively, the damping winding may include a plurality of single winding bodies, with each mounting surface of the second tooth corresponding to one single winding body, and adjacent single winding bodies being spaced apart. Each single winding body includes an inner ring body, an outer ring body, and a plurality of damping guide bars. The inner ring body and the outer ring body are respectively disposed on the radial sides of the second tooth, and the damping guide bars are connected between the inner ring body and the outer ring body.

[0013] In a preferred embodiment, a filler is also provided inside the damping hole to constrain the damping guide bar.

[0014] As a preferred embodiment, it also includes: A baffle is provided between two adjacent coils, and the baffle is fixed to the yoke.

[0015] In a preferred embodiment, an insulating element is provided between the coil and the yoke, and between the coil and the first tooth.

[0016] In a preferred embodiment, the second tooth is integrally injection molded from SMC material, or formed by stacking several silicon steel sheets or several soft magnetic alloy materials radially. The first iron core is made of structural steel.

[0017] Compared with existing technologies, this technical solution has the following advantages: By adding the excitation winding, the magnitude of the excitation current can be adjusted, thereby controlling the magnitude of the excitation magnetic field and achieving controllable excitation. This increases the flexibility of motor control and expands application scenarios. Using the first and second iron cores facilitates the arrangement and positioning of the excitation winding. The excitation winding can be first fitted onto the outer circumference of the first tooth of the first iron core, and then the second tooth of the second iron core can be inserted into the first tooth, positioning the excitation winding between the first and second iron cores. This enhances structural stability and reduces losses. Adding the damping winding not only improves the motor's dynamic response performance but also reduces the impact on the stator windings when the motor is used for power generation, increasing the motor's ability to resist unbalanced loads.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the rotor structure of the axial magnetic field motor described in this invention; Figure 2 This is an exploded view of the rotor structure of the axial magnetic field motor described in this invention; Figure 3 This is a schematic diagram of the excitation winding structure described in this invention; Figure 4 This is a schematic diagram of the structure of the first iron core of the present invention; Figure 5 This is a schematic diagram of the structure of the second tooth of the present invention; Figure 6 This is a top view of the second tooth of the present invention; Figure 7 This is a bottom view of the second tooth of the present invention; Figure 8 This is a schematic diagram of the structure of the first embodiment of the damping winding described in this invention; Figure 9 This is a schematic diagram of the second embodiment of the damping winding described in this invention; Figure 10 This is a schematic diagram of the assembly of the first iron core, the excitation winding, and the baffle of the present invention. Figure 11 This is a schematic diagram of the assembly of the second iron core and the damping winding of the first embodiment of the present invention; Figure 12 This is a schematic diagram of the assembly of the second iron core, the damping winding of the first embodiment, and the filler of the present invention; Figure 13 This is a schematic diagram of the assembly of the second iron core and the damping winding of the second embodiment of the present invention; Figure 14 This is a schematic diagram of the assembly of the second iron core, the damping winding of the second embodiment, and the filler of the present invention; Figure 15 for Figure 14 Cross-sectional view; Figure 16 This is a schematic diagram of another embodiment of the second tooth of the present invention.

[0020] In the diagram: 100 First iron core, 110 First tooth, 1100 Opening, 120 Yoke, 121 Threaded hole, 200 Second iron core, 210 Second tooth, 2100 Mounting surface, 2101 Damping hole, 211 Pole body, 212 Pole shoe, 300 Excitation winding, 310 Coil, 320 Coil connecting wire, 330 Winding lead wire, 400 Damping winding, 4000 Single winding body, 410 Damping guide bar, 420 Inner ring body, 430 Outer ring body, 440 Filler, 500 Baffle, 600 Screw. Detailed Implementation

[0021] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0022] First Embodiment like Figure 1 and Figure 2 As shown, the rotor structure of the axial magnetic field motor includes: Rotor cores 100 and 200, wherein multiple teeth 110 and 210 are provided on the rotor cores 100 and 200; The excitation winding 300 includes a plurality of coils 310, which are sleeved on the sides of the teeth 110 and 210. The damping winding 400 includes multiple radially arranged damping guide bars 410 and an inner ring body 420 and an outer ring body 430 arranged circumferentially. At least one of the multiple damping guide bars 410 forms a closed loop with another bar through the inner ring body 420 and the outer ring body 430. The damping winding 400 is installed at the top of the teeth 110 and 210.

[0023] By adding the damping winding 400, not only can the dynamic response performance of the motor be improved, but when the motor is used as a generator, the impact on the stator winding can also be reduced, thereby increasing the motor's ability to resist unbalanced loads. Furthermore, by rationally allocating space, the damping winding 400 is positioned at the top of the teeth 110 and 210, resulting in a compact structure and small size.

[0024] The rotor cores 100 and 200 include: The first iron core 100 includes a plurality of first teeth 110, which are arranged circumferentially at intervals, and one end of each first tooth 110 is provided with an opening 1100 in the axial direction. The second iron core 200 includes a plurality of second teeth 210; A coil 310 is respectively sleeved on the outer periphery of each of the first teeth 110, and the second teeth 210 are accommodated in the first teeth 110 through the opening 1100, and the coil 310 is limited between the first iron core 100 and the second iron core 200.

[0025] Rotor cores typically employ a monolithic structure, and the excitation components, composed of permanent magnets, suffer from uncontrollable excitation, limiting the flexibility of motor control and impacting application scenarios. This application, however, by adding the excitation winding 300, allows for adjustment of the excitation current, thereby controlling the magnitude of the excitation magnetic field and achieving controllable excitation. This increases the flexibility of motor control and expands application scenarios. By employing the first core 100 and the second core 200, the excitation winding 300 can be arranged and positioned. The excitation winding 300 can be first fitted onto the outer periphery of the first tooth 110 of the first core 100, and then the second tooth 210 of the second core 200 can be inserted into the first tooth 110. This positions the excitation winding 300 between the first core 100 and the second core 200, enhancing structural stability and reducing losses.

[0026] like Figure 2 and Figure 4 As shown, the first iron core 100 also includes a yoke 120. One axial end of the first tooth 110 is connected to the yoke 120, and the other axial end of the first tooth 110 is provided with an opening 1100. The second tooth 210 is accommodated in the first tooth 110 through the opening 1100.

[0027] The yoke 120 is disc-shaped, and a plurality of first teeth 110 are circumferentially spaced on the yoke 120. The first teeth 110 have a through-hole structure, and the lower end of the first teeth 110 is closed by the yoke 120, while the upper end of the first teeth 110 is open, forming the opening 1100, so that the second teeth 210 can be inserted into the first teeth 110 through the opening 1100. In addition, the yoke 120 has several through holes, which correspond one-to-one with and communicate with the openings 1100 on the first tooth 110. The second tooth 210 is disposed in the corresponding openings 1100 and through holes. It can be seen that the second tooth 210 is disposed in both the first tooth 110 and the yoke 120. The upper end face of the second tooth 210 is flush with the upper end face of the first tooth 110, and the lower end face of the second tooth 210 is flush with the lower end face of the yoke 120. That is, the axial dimension of the second tooth 210 is the sum of the axial dimensions of the first tooth 110 and the yoke 120. The key to reducing the total rotor loss is the second tooth 210. The larger the proportion of the second tooth 210, the more obvious the effect of reducing loss.

[0028] An insulating element is provided between the coil 310 and the yoke 120, and between the coil 310 and the first tooth 110, to ensure insulation. The insulating element can be insulating paper. For example, the insulating element is first arranged on the outer periphery of the first tooth 110, and then the coil 310 is sleeved on the outside of the insulating element so that the first tooth 110 and the coil 310 are insulated from each other by the insulating element.

[0029] like Figure 5 As shown, the second tooth 210 includes a pole body 211 and a pole shoe 212 that are in contact with each other. The pole body 211 is housed within the first tooth 110, and the pole shoe 212 is exposed outside the first tooth 110. The end of the pole shoe 212 away from the pole body 211 is provided with a mounting surface 2100, which can be used to mount the damping winding 400.

[0030] Furthermore, the second tooth portion 210 may not have the pole shoe 212, see reference. Figure 16 Specifically, a mounting surface 2100 is directly provided on the second tooth portion 210. The second tooth portion 210 includes a pole body 211, one end of which is housed within the first tooth portion 110, and the other end of which has a mounting surface 2100 and is exposed outside the first tooth portion 110 for mounting the damping winding 400. Therefore, depending on the electromagnetic performance requirements of the motor, a pole shoe structure or a damping winding 400 can be added.

[0031] The number of the second teeth 210 is the same as the number of the first teeth 110, and the shapes of the pole body 211 and the first teeth 110 are adapted to each other, with their cross-sections being trapezoidal. That is, the widths of the pole body 211 and the first teeth 110 gradually increase radially from the inside to the outside. In addition, the radially inner surfaces of the pole body 211 and the first teeth 110 can be planar or concave arc surfaces, while the radially outer surfaces of the pole body 211 and the first teeth 110 can be planar or convex arc surfaces.

[0032] The pole body 211 mainly includes outer diameter, inner diameter, inner pole arc coefficient, outer pole arc coefficient, and height parameters. The magnetic pole angle Pole_Angle is defined as follows: See Figure 7 The central angle of the inner arc of the polar body 211 is θ1, and the central angle of the outer arc is θ2. The inner and outer polar arc coefficients are defined as follows: Furthermore, when the second tooth 210 is inserted into the first tooth 110, the pole body 211 of the second tooth 210 can be flush with the upper and lower end faces of the first tooth 110, so that the pole shoe 212 can abut against the end face of the first tooth 110 where the opening 1100 is provided. Moreover, the first tooth 110 and the second tooth 210 can be bonded together with high-strength adhesive to constrain the second tooth 210, especially to prevent axial displacement of the second tooth 210.

[0033] Continue to refer to Figures 5 to 7 The shape of the pole shoe 212 is consistent with that of the pole body 211, that is, the pole shoe 212 is trapezoidal, and the width of the pole shoe 212 gradually increases from the inside to the outside in the radial direction. The radial inner side of the pole shoe 212 can be a plane or a concave arc surface, and the radial outer side of the pole shoe 212 is a plane or a convex arc surface.

[0034] like Figure 2 and Figure 3 As shown, the coil 310, which is sleeved on the outer periphery of the first tooth 110, has the same shape and the same number as the first tooth 110. The number of coils 310 is the number of poles of the motor.

[0035] refer to Figure 3The excitation winding 300 includes several coils 310, several coil connecting lines 320, and two winding lead lines 330. Several coils 310 are connected in series through the coil connecting lines 320, and the first and last coils 310 are respectively connected to the winding lead lines 330. Each first tooth 110 is fitted with a coil 310 on its outer periphery, and the winding directions of two adjacent coils 310 are opposite.

[0036] Specifically, the excitation winding 300 is an integrally formed structure, which can be made by winding a single coil. Of course, the coil connecting wire 320 can be soldered to the coil 310. Several coils 310 are arranged in a circular interval. Two adjacent coils 310 are selected as the first and last coils, and each is connected to a winding lead wire 330 for passing DC excitation current. Any other two adjacent coils 310 are connected by a coil connecting wire 320 to achieve series connection.

[0037] Furthermore, the winding directions of two adjacent coils 310 are opposite, and the coil connecting wires 320 are arranged at an angle, as shown in the reference. Figure 3 It should be noted that the number of coils 310, the first tooth 110 and the second tooth 210 is even. In this way, when DC current is applied to the excitation winding, coils with the same winding direction generate excitation magnetic fields of the same polarity, that is, adjacent coils generate excitation magnetic fields of different polarities. When the rotor structure rotates, the excitation winding and the excitation magnetic field it generates also rotate together and remain relatively stationary, so that an induced electromotive force can be generated in the armature winding.

[0038] like Figures 5 to 7 As shown, the pole shoe 212 extends outward from the outer periphery of the first tooth 110 to confine the coil 310 of the excitation winding 300 between the pole shoe 212 and the yoke 120 for axial positioning. Specifically, the pole shoe 212 extends circumferentially to both sides of the first tooth 110, with an extension distance of W on each side, to confine the coil 310 on both circumferential sides. Simultaneously, the pole shoe 212 extends radially to both sides of the first tooth 110 to confine the coil 310 on both radial sides. See [reference needed]. Figure 7 .

[0039] like Figure 1 and Figure 2 As shown, the top of the teeth 110 and 210 is provided with a mounting surface 2100, and the damping winding 400 is embedded in the mounting surface 2100.

[0040] By adding the damping winding 400, not only can the dynamic response performance of the motor be improved, but also the ability of the motor to resist unbalanced loads can be increased when the motor is used for power generation.

[0041] When the second tooth portion 210 consists only of the pole body 211, the mounting surface 2100 is provided at the end of the pole body 211 exposed outside the first tooth portion 110. When the second tooth portion 210 includes the pole body 211 and the pole shoe 212, the mounting surface 2100 is provided at the end of the pole shoe 212 away from the pole body 211.

[0042] like Figure 8 As shown, the damping winding 400 includes a plurality of damping guide bars 410, an inner ring body 420 and an outer ring body 430. The inner ring body 420 and the outer ring body 430 are respectively disposed on the radial sides of the second tooth portion 210. The damping guide bars 410 are connected between the inner ring body 420 and the outer ring body 430, and the damping guide bars 410 are embedded in the mounting surface 2100.

[0043] The damping guide bar 410, the inner ring body 420, and the outer ring 430 can be made of excellent conductor materials such as copper. The inner ring body 420 and the outer ring body 430 are closed annular structures. The damping guide bar 410 can be fixed to the inner ring body 420 and the outer ring body 430 by welding or other means, so that the damping winding 400 has excellent conductivity. Each second tooth 210 corresponds to a set of damping guide bars 410, and the number of damping guide bars 410 in each set is equal. The number of sets of damping guide bars 410 is also the same as the number of poles of the motor.

[0044] refer to Figure 5 and Figure 6 Each mounting surface 2100 has a plurality of damping holes 2101, which radially penetrate the second tooth 210. Each damping hole 2101 contains a damping guide strip 410. The cross-section of the damping hole 2101 is U-shaped, and the damping guide strip 410 is cylindrical, the size of which matches the size of the damping hole 2101, and the damping guide strip 410 is placed inside the damping hole 2101.

[0045] When the number of damping holes 2101 is odd, the middle damping hole is located on the center line of the mounting surface of the pole body or pole shoe, and the angle between adjacent damping holes is generally equal, α. See [reference needed]. Figure 6 When the number of damping holes 2101 is even, they are arranged symmetrically in two groups on both sides of the center line of the mounting surface of the pole body or pole shoe. The angle β between the two groups of damping holes 2101 and the angle α between adjacent damping holes in each group are determined by the electromagnetic characteristics.

[0046] like Figure 12As shown, a filler 440 is also provided inside the damping hole 2101 to constrain the damping guide strip 410. The filler 440 includes high-strength adhesive or a mixture of iron powder with magnetic properties and adhesive. First, the damping guide strip 410 is placed at the bottom of the damping hole 2101, and then the filler 440 is filled into the damping hole 2101, ensuring the flatness of the mounting surface 2100. (Refer to...) Figure 15 .

[0047] like Figure 1 , Figure 2 and Figure 10 As shown, the rotor structure of the axial magnetic field motor further includes: A baffle 500 is provided between two adjacent coils 310. The baffle 500 is fixed to the yoke 120. The function of the baffle 500 is to provide circumferential constraint to the coils 310 and ensure the stability of the structure.

[0048] Specifically, the baffle 500 can be fixed to the yoke 120 by screws 600. The yoke 120 has several threaded holes 121. The screws 600 pass through the baffle 500 and are screwed into the threaded holes 121 to achieve fixation. Furthermore, the holes on the baffle 500 are countersunk holes to allow the screws 600 to be hidden inside the baffle 500. (Reference) Figure 1 and Figure 10 The horizontal height of the baffle 500 is slightly lower than the horizontal height of the first tooth 110 to avoid affecting the arrangement of the second tooth on the first tooth 110.

[0049] like Figure 1 and Figure 2 As shown, the first iron core 100 is supported by structural steel material with high magnetic permeability, low electrical conductivity, and high mechanical properties to enhance its support capacity. The second tooth 210 can be made of SMC material (composite soft magnetic material), silicon steel sheet material, or soft magnetic alloy material. If it is made of SMC material, the second tooth 210 is an integral structure; if it is made of silicon steel sheet material or soft magnetic alloy material, the second tooth 210 is a stacked structure with the stacking direction being radial. The first iron core 100 and the second iron core 200 are separate assembly structures, and the second tooth 210 of the second iron core 200 adopts a stacked structure, which can block eddy current paths to reduce eddy current losses and avoid the phenomenon of high-temperature burnout of the rotor structure due to heat loss, thereby ensuring the reliable operation of the motor. This effectively reduces losses.

[0050] like Figure 1 , Figure 2 , Figure 10 and Figure 11As shown, the assembly method of the axial magnetic field motor rotor structure is as follows: S100, the excitation winding 300 is arranged on the first tooth 110 of the first iron core 100, and then the baffle 500 is arranged between the coils 310 adjacent to the excitation winding 300.

[0051] S200, the damping winding 400 is arranged on the second tooth 210 of the second iron core 200.

[0052] S300, the second tooth 210 is inserted into the first tooth 110, and the two can be bonded together with high-strength adhesive so that the coil 310 is confined between the first iron core 100 and the second iron core 200.

[0053] In step S100, a coil 310 is fitted around the outer periphery of each of the first teeth 110, and the coil 310 abuts against the yoke 120 of the first iron core 100. A baffle 500 is arranged between two adjacent coils 310. The baffle 500 can be fixed to the yoke 120 by the screw 600, and the baffle 500 can provide circumferential constraint on the coil 310. (Reference) Figure 10 The winding lead 330 of the excitation winding 300 is led out from the radial inner side, or it can be led out from the radial outer side, depending on the design requirements.

[0054] In step S200, the damping winding 400 is arranged on the pole shoe 212 of the second tooth 210. Specifically, the damping guide 410 of the damping winding 400 is embedded in the mounting surface 2100 of the pole shoe 212. The filler 440 can be filled into the damping hole 2101 of the mounting surface 2100 to constrain the damping guide 410 within the damping hole 2101.

[0055] In step S300, the pole body 211 of the first tooth 110 is inserted into the first tooth 110, and the pole shoe 212 is exposed outside the first tooth 110. At this time, the coil 310 is confined between the pole shoe 212 and the yoke 120. It can be seen that the axial magnetic field motor rotor structure is manufacturable and can effectively limit and fix the coil 310.

[0056] In summary, by adding the excitation winding 300, the magnitude of the excitation current can be adjusted, thereby controlling the magnitude of the excitation magnetic field and achieving controllable excitation. This increases the flexibility of motor control and expands application scenarios. Using the first iron core 100 and the second iron core 200 facilitates the arrangement and positioning of the excitation winding 300. The excitation winding 300 can be first fitted onto the outer periphery of the first tooth 110 of the first iron core 100, and then the second tooth 210 of the second iron core 200 can be inserted into the first tooth 110, positioning the excitation winding 300 between the first iron core 100 and the second iron core 200. This enhances structural stability and reduces losses. Adding the damping winding 400 not only improves the dynamic response performance of the motor but also increases its ability to resist unbalanced loads when used as a generator.

[0057] The aforementioned axial field motor can be an electrically excited axial flux motor, which can be used as either a generator or a motor. When used as a generator, the controllable excitation current can ensure stable output voltage under different speeds, loads, and operating temperatures. When used as a motor, the excitation current and armature current can be matched and controlled. Especially at medium and high speeds, because the permanent magnet field of a permanent magnet motor is uncontrollable, only a field weakening strategy can be adopted, which increases the armature current and the winding copper loss. However, an electrically excited motor can control the magnitude of the excitation field by adjusting the magnitude of the excitation current at medium and high speeds. The armature current only provides the component used to generate torque and no longer provides the component used for field weakening, thereby reducing the armature current and armature copper loss during medium and high speed operation.

[0058] Electrically excited axial flux motors offer greater flexibility in motor control due to their controllable excitation, especially during medium- and high-speed operation. They also eliminate the need for expensive permanent magnets, avoiding the risk of demagnetization and reducing motor production costs. As a result, they have a wide range of applications in the aerospace industry and other fields with high cost requirements for motors.

[0059] Second Embodiment The axial magnetic field motor of the second embodiment differs from that of the first embodiment in that the damping winding 400 is composed of a plurality of single winding bodies 400, see [link to relevant documentation]. Figure 9 .

[0060] Specifically, the damping winding 400 includes a plurality of single winding bodies 4000, which are arranged circumferentially. The mounting surface 2100 of each second tooth 210 corresponds to one single winding body 4000. The single winding body 4000 includes an inner ring body 420, an outer ring body 430, and a plurality of damping guide bars 410. The inner ring body 420 and the outer ring body 430 are respectively disposed on the radial sides of the second tooth 210. The damping guide bars 410 are connected between the inner ring body 420 and the outer ring body 430, and the damping guide bars 410 are embedded in the mounting surface 2100.

[0061] Several single-winding bodies 4000 are arranged at circumferential intervals, and each single-winding body 4000 is correspondingly mounted on one of the second teeth 210. The outer ring body 430 and the inner ring body 420 can form an open ring, as shown in the reference. Figure 9 It can also form a closed ring, so that several of the single winding bodies 4000 are arranged in a circular interval, and the single winding bodies 4000 under two adjacent magnetic poles have no mechanical or electrical connection.

[0062] Similarly, the inner ring 420 and the outer ring 430 are located on the radial sides of the pole shoe 212, and the damping guide 410 is disposed in the damping hole 2101 of the mounting surface 2100 of the pole shoe 212. Then, the filler 440 is filled in the damping hole 2101 to constrain the damping guide 410 within the damping hole 2101.

[0063] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The scope of patent application of the present invention should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in the present invention still fall within the patent scope of the present invention.

Claims

1. A rotor structure for an axial magnetic field motor, characterized in that, include: The rotor core (100, 200) is provided with a plurality of teeth (110, 210). Excitation winding (300), the excitation winding (300) includes a plurality of coils (310), the coils (310) being sleeved on the side of the teeth (110, 210); A damping winding (400) includes multiple radially arranged damping bars (410) and an inner ring (420) and an outer ring (430) arranged circumferentially. One of the multiple damping bars (410) forms a closed loop with at least one other bar through the inner ring (420) and the outer ring (430). The damping winding (400) is mounted on the top of the teeth (110, 210). The rotor core (100, 200) comprises: The first iron core (100) includes a plurality of first teeth (110), which are arranged in a circumferentially spaced manner, and an opening (1100) is provided at one end of the first teeth (110) in the axial direction. The second iron core (200) includes a plurality of second teeth (210); A coil (310) is respectively sleeved on the outer periphery of each of the first teeth (110), the second teeth (210) are accommodated in the first teeth (110) through the opening (1100), and the coil (310) is limited between the first iron core (100) and the second iron core (200); The first iron core (100) further includes a yoke (120), the first tooth (110) is connected to the yoke (120), and the yoke (120) is located at the end of the first tooth (110) away from the opening (1100); The first tooth (110) and the yoke (120) are integrally connected, and the second tooth (210) is disposed inside both the first tooth (110) and the yoke (120).

2. The axial magnetic field motor rotor structure as described in claim 1, characterized in that, The second tooth (210) includes an adjoining pole body (211) and a pole shoe (212), the pole body (211) being housed within the first tooth (110) and the pole shoe (212) being exposed outside the first tooth (110); Alternatively, the second tooth (210) may include an electrode (211) which is housed within the first tooth (110).

3. The axial magnetic field motor rotor structure as described in claim 2, characterized in that, The pole shoe (212) extends toward the outer periphery of the first tooth (110) so that the coil (310) of the excitation winding (300) is confined between the pole shoe (212) and the yoke (120).

4. The axial magnetic field motor rotor structure as described in any one of claims 1-3, characterized in that, The top of the tooth (110, 210) is provided with a mounting surface (2100), and the damping winding (400) is embedded in the mounting surface (2100).

5. The axial magnetic field motor rotor structure as described in claim 4, characterized in that, A plurality of damping holes (2101) are provided on the mounting surface (2100), the damping holes (2101) penetrate the teeth (110, 210) radially, and the damping guide (410) is installed in the damping holes (2101).

6. The axial magnetic field motor rotor structure as described in claim 4, characterized in that, The inner ring (420) and the outer ring (430) are respectively disposed on the radial sides of the second tooth (210), and the damping guide (410) is connected between the inner ring (420) and the outer ring (430); Alternatively, the damping winding (400) may include a plurality of single winding bodies (4000), with each mounting surface (2100) of the second tooth (210) corresponding to a single winding body (4000). Two adjacent single winding bodies (4000) are spaced apart. Each single winding body (4000) includes an inner ring body (420), an outer ring body (430), and a plurality of damping guide bars (410). The inner ring body (420) and the outer ring body (430) are respectively disposed on the radial sides of the second tooth (210), and the damping guide bars (410) are connected between the inner ring body (420) and the outer ring body (430).

7. The axial magnetic field motor rotor structure as described in claim 5, characterized in that, A filler (440) is also provided inside the damping hole (2101) to constrain the damping guide strip (410).

8. The axial magnetic field motor rotor structure as described in claim 1, characterized in that, Also includes: A baffle (500) is provided between two adjacent coils (310), and the baffle (500) is fixed to the yoke (120).

9. The axial magnetic field motor rotor structure as described in claim 1, characterized in that, An insulating element is provided between the coil (310) and the yoke (120), and between the coil (310) and the first tooth (110).

10. The axial magnetic field motor rotor structure as described in claim 1, characterized in that, The second tooth (210) is integrally injection molded from SMC material, or is formed by stacking several silicon steel sheets or several soft magnetic alloy materials radially; The first iron core (100) is made of structural steel.

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