A heat dissipation structure for an axial flux motor, the axial flux motor, and an aircraft.

Abstract

This invention provides a heat dissipation structure for an axial flux motor, including an upper stator positioning plate, a lower stator positioning plate, and heat pipes. The upper and lower stator positioning plates are stacked along the motor's axial direction. Heat pipe mounting slots are provided between the segmented coil positioning compartments of the upper and lower stator positioning plates, extending radially. The heat pipes are fixed within these slots, allowing internal heat to be conducted to the outer wall of the stator positioning plates, reducing internal heat accumulation. Heat from the outer wall of the stator positioning plates can be dissipated through a wind-cooling system, effectively improving the wind-cooling efficiency. This axial flux motor heat dissipation structure uses heat pipes to conduct heat from the segmented coils of the stator to the outside, reducing internal heat accumulation. Combined with the external wind-cooling system, it effectively dissipates internal heat, improving the efficiency of the wind-cooling system. Furthermore, it has minimal impact on the system complexity and weight of the UAV and offers high reliability.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a heat dissipation structure for an axial flux motor, an axial flux motor, and an aircraft. Background Technology

[0002] Axial flux motors have advantages such as compact structure, high efficiency, and high power density, which can improve the power performance of drones. However, their compact structure and high power density lead to significant heat generation and temperature rise, which limits the actual working power and has a limited effect on improving the power performance of drones.

[0003] Currently, the mainstream heat dissipation solutions are air cooling and water cooling. Water cooling has high heat dissipation efficiency, but it requires circulation components such as coolant, water circulation, and radiators, and requires a certain amount of installation space. It is commonly used in medium and large drones, and it increases the system complexity and weight of the drone, reducing reliability. Air cooling requires less installation space and is usually used in small drones, but its heat dissipation efficiency is low. It is usually done by setting heat sinks on the outer surface of the motor to increase heat dissipation efficiency, but the axial flux motor has a compact structure and significant internal heat accumulation, so setting heat sinks on the outer surface has little effect. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a heat dissipation structure for an axial flux motor, an axial flux motor, and an aircraft, in order to solve the problem that traditional air cooling is insufficient in heat dissipation, while water cooling, although highly efficient, increases the system complexity and weight of the UAV and reduces its reliability.

[0005] This utility model provides a heat dissipation structure for an axial flux motor, comprising: an upper stator positioning plate, a lower stator positioning plate, and a heat pipe, wherein...

[0006] The upper stator positioning plate and the lower stator positioning plate are stacked along the axial direction of the motor. A heat pipe mounting groove is provided between each segmented coil positioning compartment of the upper stator positioning plate and the lower stator positioning plate, and the heat pipe mounting groove extends radially.

[0007] The heat pipe is fixed in the heat pipe mounting groove.

[0008] Optionally, the heat pipe mounting groove is disposed on the mating surface of the upper positioning plate and the lower positioning plate of the stator.

[0009] Optionally, the heat pipe has an L-shaped structure to form a continuous radial section and a circumferential section, with the circumferential section located on the outside of the motor.

[0010] Optionally, heat dissipation fins are also provided at the edges of the upper positioning plate and the lower positioning plate of the stator, and multiple heat dissipation fins are arranged at intervals around the motor.

[0011] Optionally, it also includes an upper rotor and a lower rotor, respectively disposed above and below the upper positioning plate of the stator and the lower positioning plate of the stator, wherein,

[0012] The heat dissipation fins are respectively erected on the upper surface of the upper positioning plate of the stator and the lower surface of the lower positioning plate of the stator;

[0013] The upper rotor and the lower rotor are also provided with centrifugal air ducts. The air outlet of the centrifugal air ducts points to the heat dissipation fins. When the centrifugal air ducts rotate with the upper rotor and the lower rotor, they can provide heat dissipation airflow.

[0014] Optionally, the heat dissipation fins are also arranged to deflect radially along the motor.

[0015] Optionally, the centrifugal duct is a guide groove structure disposed on the lower surface of the upper rotor and the upper surface of the lower rotor.

[0016] This utility model also provides an axial flux motor, including the heat dissipation structure of the axial flux motor described above.

[0017] This invention also provides an aircraft, including the aforementioned axial flux motor.

[0018] The heat dissipation structure of the axial flux motor provided by this utility model includes an upper stator positioning plate, a lower stator positioning plate, and heat pipes. The upper and lower stator positioning plates are stacked along the axial direction of the motor. Heat pipe mounting slots are provided between the positioning compartments of the segmented coils on the upper and lower stator positioning plates, extending radially. The heat pipes are fixed in the mounting slots, allowing internal heat to be conducted to the outer wall of the stator positioning plate, reducing internal heat accumulation. Heat on the outer wall of the stator positioning plate can be dissipated through a wind-cooling system, effectively improving the wind-cooling effect. This axial flux motor heat dissipation structure uses heat pipes to conduct heat from the segmented coils of the stator to the outside, reducing internal heat accumulation. Combined with the external wind-cooling system, it effectively dissipates internal heat, improving the heat dissipation efficiency of the wind-cooling system. Furthermore, it has minimal impact on the system complexity and weight of the UAV and offers high reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the axial flux motor in the embodiment of this utility model;

[0020] Figure 2 This is an exploded structural diagram of the axial flux motor in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the stator lower positioning plate of the axial flux motor in this embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the lower rotor of the axial flux motor in an embodiment of the present invention.

[0023] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] To address the shortcomings of traditional air cooling in heat dissipation, and the fact that while water cooling offers high efficiency, it increases the system complexity and weight of drones, reducing reliability, this invention provides a heat dissipation structure for an axial flux motor. Heat pipe mounting slots are provided between the segmented coil positioning compartments on the upper and lower stator positioning plates. Heat pipes are fixed within these slots, extending radially to conduct internal heat to the outer wall of the stator positioning plate. The heat conducted to the outer wall is then effectively dissipated through external surface cooling designs such as air or water cooling, significantly reducing internal heat accumulation and improving overall heat dissipation. This axial flux motor heat dissipation structure uses heat pipes to conduct heat from the segmented coils of the stator to the outside, reducing internal heat accumulation. Combined with an external surface air cooling system, it effectively dissipates internal heat, improving the efficiency of the air cooling system. Furthermore, it has minimal impact on the system complexity and weight of the drone, resulting in high reliability.

[0028] Specifically, please refer to Figure 1 and Figure 2The heat dissipation structure of this embodiment is mainly used for axial flux motors, and is a dual-rotor motor. It includes an upper stator positioning plate 110 and a lower stator positioning plate 120, as well as an upper rotor 210 and a lower rotor 220 respectively disposed above the upper stator positioning plate 110 and below the lower stator positioning plate 120. The whole structure is symmetrical. This article mainly describes the main structure of the symmetrical structure, and does not elaborate on the other half of the symmetry.

[0029] In this embodiment, the surface heat dissipation system is air-cooled. Correspondingly, heat dissipation fins 101 are provided at the edges of the upper stator positioning plate 110 and the lower stator positioning plate 120. Centrifugal air ducts 203 are provided in the upper rotor 210 and the lower rotor 220. The air inlet 201 of the centrifugal air duct 203 is located close to the center, and the air outlet 202 points to the heat dissipation fins 101. When the rotor rotates, heat dissipation airflow can be generated in the centrifugal air duct 203 and blown towards the heat dissipation fins 101 to dissipate heat from the edge areas of the upper stator positioning plate 110 and the lower stator positioning plate 120.

[0030] Please refer to further details. Figure 4 In this embodiment, the total thickness of the upper stator positioning plate 110 and the lower stator positioning plate 120 is less than the height of the segmented coil 30 of the stator. The centrifugal air duct 203 is a guide groove structure provided on the lower surface of the upper rotor 210 and the upper surface of the lower rotor 220, so that the segmented coil 30 can be exposed outside the upper stator positioning plate 110 and the lower stator positioning plate 120 in the whole machine. The heat dissipation airflow in the centrifugal air duct 203 can also directly act on the upper and lower parts of the segmented coil 30, thereby improving the heat dissipation effect.

[0031] Most of the structure of the segmented coil 30 is enclosed within the upper stator positioning plate 110 and the lower stator positioning plate 120. To reduce heat accumulation in the enclosed portion, in this embodiment, please refer to... Figure 3 The lower stator positioning plate 120 is further provided with a heat pipe mounting groove 102 in the gap of the segmented coil positioning compartment 103. A heat pipe 40 is fixedly installed in the heat pipe mounting groove 102 and extends radially outward. The heat pipe 40 can conduct internal heat to the outer walls of the upper stator positioning plate 110 and the lower stator positioning plate 120. The heat conducted to the outer walls is dissipated through a wind-cooling system. It can be understood that the heat pipe design of this embodiment can also be applied to a water-cooling system; that is, various external surface heat dissipation systems of the stator positioning plate are all within the scope of protection of this application.

[0032] In this application, the heat pipe 40 has an L-shaped structure, including a connected radial section and a circumferential section. The circumferential section extends along the circumference of the motor. After the radial section conducts heat out of the motor, it can be further dispersed through the circumferential section to increase the heat dissipation surface and improve the heat dissipation effect.

[0033] Due to the limitations of the L-shaped structure, in this embodiment, the heat pipe 40 is disposed on the mating surface of the upper stator positioning plate 110 and the lower stator positioning plate 120, and is fixed as the upper stator positioning plate 110 and the lower stator positioning plate 120 are closed. In an optional embodiment, the heat pipe 40 only includes a radial section, which can be embedded in the upper stator positioning plate 110 and the lower stator positioning plate 120, and one set is respectively disposed in the upper stator positioning plate 110 and the lower stator positioning plate 120, which can further improve the heat dissipation effect.

[0034] The heat transferred through the heat pipe 40 to the edge areas of the upper stator positioning plate 110 and the lower stator positioning plate 120 can be further distributed to the heat dissipation fins 101 and carried out by the heat dissipation airflow. In order to further improve the heat dissipation effect, in this embodiment, the heat dissipation fins 101 are also arranged to be radially deflected along the motor, so that when the heat dissipation airflow blows onto the heat dissipation fins 101, it can form vortices through the obstruction of the heat dissipation fins 101, thereby improving the heat dissipation efficiency.

[0035] This utility model also provides an aircraft, including an axial flux motor with the above-mentioned heat dissipation structure, which can reduce internal heat accumulation, improve heat dissipation, and enhance the performance release capability of the axial flux motor in the aircraft without significantly affecting the size and weight of the motor, thereby improving the performance of the aircraft.

[0036] The heat dissipation structure of the axial flux motor provided by this invention features heat pipe mounting slots between the segmented coil positioning compartments of the upper and lower stator positioning plates. Heat pipes are fixed within these slots and extend radially, allowing internal heat to be conducted to the outer wall of the stator positioning plate. The heat transferred to the outer wall is then effectively dissipated through external surface cooling designs such as air cooling or water cooling, effectively reducing internal heat accumulation and improving heat dissipation. This axial flux motor heat dissipation structure uses heat pipes to conduct internal heat from the segmented coils of the stator to the outside, reducing internal heat accumulation. Combined with an external surface air cooling system, it effectively dissipates internal heat, improving the cooling efficiency of the air cooling system. Furthermore, it has minimal impact on the system complexity and weight of the UAV and offers high reliability.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A heat dissipation structure of an axial flux motor, characterized by, include: The stator upper positioning plate, stator lower positioning plate, and heat pipes, among which... The upper stator positioning plate and the lower stator positioning plate are stacked along the axial direction of the motor. A heat pipe mounting groove is provided between each segmented coil positioning compartment of the upper stator positioning plate and the lower stator positioning plate, and the heat pipe mounting groove extends radially. The heat pipe is fixed in the heat pipe mounting groove.

2. The heat dissipating structure of an axial flux motor according to claim 1, wherein, The heat pipe mounting groove is disposed on the mating surface of the upper positioning plate and the lower positioning plate of the stator.

3. The heat sink structure of an axial flux motor according to claim 2, characterized in that, The heat pipe has an L-shaped structure to form continuous radial and circumferential sections, with the circumferential section located on the outer side of the motor.

4. The heat sink structure of an axial flux machine according to claim 3, characterized in that, The upper positioning plate of the stator and the lower positioning plate of the stator are also provided with heat dissipation fins at their edges, and multiple heat dissipation fins are arranged at intervals around the motor.

5. The heat sink structure of an axial flux machine according to claim 4, characterized in that, It also includes an upper rotor and a lower rotor, respectively disposed above and below the upper positioning plate of the stator and the lower positioning plate of the stator, wherein, The heat dissipation fins are respectively erected on the upper surface of the upper positioning plate of the stator and the lower surface of the lower positioning plate of the stator; The upper rotor and the lower rotor are also provided with centrifugal air ducts. The air outlet of the centrifugal air ducts points to the heat dissipation fins. When the centrifugal air ducts rotate with the upper rotor and the lower rotor, they can provide heat dissipation airflow.

6. The heat sink structure of an axial flux machine according to claim 5, wherein, The heat dissipation fins are also arranged to deflect radially along the motor.

7. The heat sink structure of an axial flux motor according to claim 5, wherein, The centrifugal air duct is a guide groove structure provided on the lower surface of the upper rotor and the upper surface of the lower rotor.

8. An axial flux motor, characterized in that, The heat dissipation structure includes the axial flux motor as described in any one of claims 1 to 7.

9. An aircraft, characterized in that Including the axial flux motor as described in claim 8.

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