Axial yoke-free dual-rotor motor and stator bracket thereof
By using a split stator support structure, the heat dissipation problem of axial yokeless dual-rotor motors is solved, achieving more efficient heat dissipation and magnetic field utilization, and reducing energy consumption.
Patent Information
- Application Number
- CN202520406206.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Axial unyoke dual-rotor motors have difficulty in heat dissipation, making them unsuitable for mass application. Existing technologies increase the amount of iron core or increase the air gap, leading to increased iron or copper losses.
The stator adopts a split-type stator support structure, including an outer support, an inner support, and an intermediate support. The intermediate support is used for winding installation and conducts heat to the outer and inner supports, thereby improving heat dissipation.
It improves heat dissipation, reduces magnetic field leakage, increases magnetic field utilization, and reduces iron and copper losses.
Smart Images
Figure CN223885018U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electric motor, in particular to an axial yokeless dual-rotor motor and a stator support thereof. BACKGROUND
[0002] The axial yokeless dual-rotor motor has large power density and torque density, but it is difficult to dissipate heat, which leads to its inability to be applied in batches. In order to solve the problem of difficult heat dissipation, there are two kinds of axial motors currently applied in batches on the market: one is to use a yoke dual-rotor to connect the yoke part and the stator shell for heat dissipation, but it increases the use of the iron core, causing the iron loss to increase; the other is to seal the iron core with a sealing plate and a stator shell for oil cooling, the existence of the sealing plate increases the air gap between the iron core and the permanent magnet, resulting in increased copper loss. Therefore, improvements are needed. CONTENT OF THE UTILITY MODEL
[0003] The utility model aims at providing an axial yokeless dual-rotor motor and a stator support thereof to overcome the deficiencies in the prior art.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0005] The embodiment of the present application discloses a stator support, which comprises coaxially arranged outer supports and inner supports, the outer supports and the inner supports are annular structures, and a plurality of intermediate supports are connected between the inner wall of the outer support and the outer wall of the inner support at intervals, and the two ends of the intermediate support are respectively slidingly inserted into the corresponding outer support and inner support.
[0006] Further, in the stator support described above, the intermediate supports are arranged in an equidistant circumferential array.
[0007] Further, in the stator support described above, the intermediate supports are arranged along the radial direction of the outer support and the inner support.
[0008] Further, in the stator support described above, the inner wall of the outer support is provided with a plurality of first grooves, the first grooves comprise first limiting grooves and first open grooves which are in communication with each other, the outer wall of the inner support is provided with second grooves which are arranged opposite to the first grooves, the second grooves comprise second open grooves and second limiting grooves which are in communication with each other, and the two ends of the intermediate support are respectively provided with a first insertion part corresponding to the first limiting groove and a second insertion part corresponding to the second limiting groove.
[0009] The embodiment of the present application further discloses an axial yokeless dual-rotor motor, which comprises the stator support, the winding arranged between the adjacent intermediate supports and the rotors rotatably arranged at the two ends of the stator support.
[0010] Further, in the axial yokeless dual-rotor motor, the rotating shaft is rotatably arranged in the inner support through a bearing.
[0011] Further, in the axial yokeless dual-rotor motor, the end of the intermediate support close to the outer support and / or the inner wall of the outer support is provided with a first threading groove.
[0012] Further, in the axial yokeless dual-rotor motor, the winding comprises an iron core and a coil wound on the iron core, and the iron core is provided with pole shoes at the two ends close to the permanent magnets.
[0013] Further, in the axial yokeless dual-rotor motor, the two sides of the intermediate support close to the two ends of the rotor are respectively provided with support grooves corresponding to the pole shoes.
[0014] Further, in the axial yokeless dual-rotor motor, the two sides of the pole shoe close to the intermediate support are respectively provided with stepped grooves corresponding to the intermediate support.
[0015] Compared with the prior art, the stator support has a split structure, the winding is convenient to install, and after the winding is installed, the winding is attached to the intermediate support and the heat is conducted to the outer support and the inner support through the intermediate support, so that the heat dissipation effect is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0017] Figure 1 Fig. 1 shows a structure schematic diagram of a stator support in an embodiment of the present application.
[0018] Figure 2 Fig. 2 shows an exploded schematic diagram of the stator support in the embodiment of the present application.
[0019] Figure 3 Fig. 3 shows a structure schematic diagram of an axial yokeless dual-rotor motor in an embodiment of the present application.
[0020] Figure 4 Figure 1 is a cross-sectional view of an axial yokeless dual rotor motor according to an embodiment of the present application.
[0021] Figure 5 Figure 2 is an exploded view of the axial yokeless dual rotor motor according to an embodiment of the present application.
[0022] Figure 6 Figure 3 is a structural view of an intermediate support according to an embodiment of the present application.
[0023] Figure 7 Figure 4 is a structural view of an intermediate support according to another embodiment of the present application.
[0024] Figure 8 Figure 5 is a structural view of an iron core according to another embodiment of the present application. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] Reference Figure 1 and Figure 2As shown in the figure, a stator support comprises coaxially arranged outer support 1 and inner support 2, both of which are annular structures, and a plurality of intermediate supports 3 are connected between the inner wall of the outer support 1 and the outer wall of the inner support 2, both ends of the intermediate support 3 are respectively slidingly inserted into the corresponding outer support 1 and inner support 2.
[0029] In the technical solution, the outer support and the inner support can be made of common materials with good heat conduction, such as aluminum alloy or peek, and the intermediate support is made of weakly magnetic or non-magnetic material. The stator support is a split structure, which is convenient for winding installation. After the winding is installed, it is attached to the intermediate support and conducts heat to the outer support and the inner support through the intermediate support, thereby improving the heat dissipation effect.
[0030] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the intermediate supports 3 are arranged in an equidistant circumferential array.
[0031] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the intermediate supports 3 are arranged along the radial direction of the outer support 1 and the inner support 2.
[0032] In the above two technical solutions, a plurality of gaps for accommodating windings are formed between the intermediate supports, and the windings are arranged in an equidistant circumferential array after installation. The windings are arranged correspondingly with the permanent magnets of the rotor, so that the magnetic field is more uniformly distributed in the iron core, the magnetic field loss is reduced, and the utilization rate of the magnetic field is improved.
[0033] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the inner wall of the outer support 1 is provided with a plurality of first grooves 11, the first grooves 11 comprise first limiting grooves and first opening grooves which are in communication with each other, the outer wall of the inner support 2 is provided with second grooves 21 which are arranged opposite to the first grooves 11, the second grooves 21 comprise second opening grooves and second limiting grooves which are in communication with each other, and both ends of the intermediate support 3 are respectively provided with first insertion parts corresponding to the first limiting grooves and second insertion parts corresponding to the second limiting grooves.
[0034] In the technical solution, the first insertion part and the second insertion part are respectively detachably connected to the corresponding first limiting groove and second limiting groove through conventional processes such as press fitting. The first limiting groove and the second limiting groove can be circular arc, T-shaped or I-shaped, and the first insertion part and the second insertion part correspond to them, so that the intermediate support can be detached from the outer support and the inner support.
[0035] As shown in the figure, Figures 3 to 8As shown in the figure, an axial yokeless dual rotor motor comprises the above-mentioned stator support, windings arranged between adjacent intermediate supports 3, and rotors rotatably arranged at both ends of the stator support, respectively. The rotor comprises a rotor disc 4 and a plurality of permanent magnets 5 arranged at one end of the rotor disc 4 close to the stator support. The rotor disc 4 is rotatably connected to the inner support 2 through a rotating shaft 6.
[0036] In the technical solution, the stator support is fixed to an external platform or a motor shell through a conventional support column or the like. The permanent magnet has a conventional structure and is fixed to the corresponding surface of the rotor disc through a conventional method such as bonding or embedding. The rotor disc is fixed to the corresponding end of the rotating shaft through a conventional bolt or the like. In the assembly process, the windings and the intermediate supports are assembled together by hand or the like, and then the two ends of the intermediate supports are pressed into the space between the outer support and the inner support, respectively.
[0037] For example, as shown in the figure, Figures 3 to 8 As shown in the figure, the rotating shaft 6 is rotatably arranged in the inner support 2 through a bearing 7.
[0038] In the technical solution, the rotating shaft has a hollow shaft structure, which reduces the self-weight of the rotating shaft and can be used for connection to an output shaft or the like. The rotating shaft is rotatably arranged in the inner support through a conventional bearing, thereby ensuring smooth rotation of the rotor.
[0039] For example, as shown in the figure, Figures 3 to 8 As shown in the figure, the intermediate support 3 is provided with a first threading groove 31 at one end close to the outer support 1 and / or the inner wall of the outer support 1.
[0040] In the technical solution, the first threading groove facilitates threading between adjacent windings.
[0041] For example, as shown in the figure, Figures 3 to 8 As shown in the figure, the winding comprises a core 8 and a coil (not shown) wound around the core 8. The core 8 is provided with a pole shoe 81 at each end close to the permanent magnet 5.
[0042] In the technical solution, the coil is a conventional enameled wire or the like and is wound around the core. The core is stacked by a conventional silicon steel sheet or the like and is formed with a pole shoe corresponding to the permanent magnet at each end, thereby increasing the area of the magnetic field and reducing the motor tooth slot torque ripple.
[0043] For example, as shown in the figure, Figures 3 to 6 As shown in the figure, the intermediate support 3 is provided with a support groove 32 corresponding to the pole shoe 81 at both sides close to the two ends of the rotor.
[0044] In the technical solution, the bottom of the support groove (the end away from the rotor) extends outward to ensure sufficient contact with the pole shoe and provide support for the pole shoe. The pole shoe can limit the axial or radial movement of the winding. The pole shoe and the intermediate support are physically insulated by a peek insulating paper or the like, thereby avoiding the formation of a current loop between the core and the intermediate support under an alternating magnetic field.
[0045] Exemplarily, referring to Figure 7 and Figure 8 As shown in the drawings, the pole shoe 81 is provided with a stepped groove 811 on each side close to the intermediate support 3.
[0046] In the technical scheme, the stepped groove of the pole shoe is arranged on the intermediate support, so that the intermediate support provides support and limiting for the pole shoe, i.e. limiting the axial or radial movement of the winding; the pole shoe and the intermediate support are physically insulated by means of peek insulation paper, so as to avoid the formation of a current loop between the iron core and the intermediate support under an alternating magnetic field.
[0047] In summary, the stator support is of a split structure, facilitating the installation of the winding. After the winding is installed, the winding is attached to the intermediate support, and the intermediate support conducts heat to the outer support and the inner support, thereby improving the heat dissipation effect.
[0048] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.
[0049] The above description is merely one specific implementation of the present application. It should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as falling within the scope of protection of the present application.
Claims
1. A stator support, characterized by, The stator support comprises coaxially arranged outer supports and inner supports, the outer supports and the inner supports are annular structures, and a plurality of intermediate supports are arranged at intervals between the inner wall of the outer support and the outer wall of the inner support, and the two ends of the intermediate supports are respectively slidably inserted into the corresponding outer support and inner support.
2. The stator support of claim 1, wherein: The intermediate supports are arranged in a circumferential array at equal intervals.
3. The stator support of claim 1, wherein: The intermediate supports are arranged along the radial direction of the outer supports and the inner supports.
4. The stator support of claim 1, wherein: The inner wall of the outer support is provided with a plurality of first grooves, the first grooves comprise first limiting grooves and first opening grooves which are in communication with each other, the outer wall of the inner support is provided with second grooves which are arranged opposite to the first grooves, the second grooves comprise second opening grooves and second limiting grooves which are in communication with each other, and the two ends of the intermediate supports are respectively provided with first insertion parts corresponding to the first limiting grooves and second insertion parts corresponding to the second limiting grooves.
5. An axial un- yoked dual rotor electric machine characterized by: The stator support comprises coaxially arranged outer supports and inner supports, the outer supports and the inner supports are annular structures, and a plurality of intermediate supports are arranged at intervals between the inner wall of the outer support and the outer wall of the inner support, and the two ends of the intermediate supports are respectively slidably inserted into the corresponding outer support and inner support.
6. The axial unjacketed dual-rotor electric machine of claim 5, wherein: The rotor comprises a rotor disc and a plurality of permanent magnets arranged at the end of the rotor disc close to the stator support, and the rotor disc is rotatably connected to the inner support through a rotating shaft.
7. The axial unjacketed dual-rotor electric machine of claim 5, wherein: The rotating shaft is rotatably arranged in the inner support through a bearing.
8. The axial unjacketed dual-rotor electric machine of claim 5, wherein: The first threading groove is arranged at the end of the intermediate support close to the outer support and / or the inner wall of the outer support.
9. The axial unjacketed dual-rotor electric machine of claim 8, wherein: The core is provided with pole shoes at the two ends close to the permanent magnets.
10. The axial unjacketed dual-rotor electric machine of claim 8, wherein: The support grooves corresponding to the pole shoes are arranged at the two sides of the intermediate support close to the two ends of the rotor. The step grooves corresponding to the intermediate supports are arranged at the two sides of the pole shoes close to the intermediate supports.