A high-power coreless disc motor

Abstract

The utility model discloses a high -power coreless disc type motor has the casing, the casing both ends are equipped with front end cover and rear end cover, be equipped with the main shaft, stator subassembly and rotor subassembly in the casing, the stator subassembly includes stator frame and a plurality of coils, the coil is flat wire winding, and one side is narrow side one side is wide, a plurality of the coil is arranged in the both sides of stator frame around the main shaft, and the narrow side side is towards the main shaft, is equipped with the heat pipe between the adjacent coil, the both ends of stator subassembly are equipped with rotor subassembly, the rotor subassembly is installed on the main shaft. The utility model discloses in the stator subassembly has adopted flat wire winding, and the narrow side direction is aligned with the magnetic line direction, and the eddy current in the copper wire magnetic field is reduced greatly, and the heating of winding is reduced, and moreover, the heat pipe is added in the stator, and the heating of winding is quickly led out to the motor casing through the heat pipe, and the heat dissipation of winding is accelerated to the outside, and the high efficiency and power density of high -power motor are maintained, and normal temperature can also be maintained.

Description

Technical Field

[0001] This utility model relates to the field of disc motor technology, and in particular to a high-power coreless disc motor. Background Technology

[0002] Coreless disc motors are a common type of motor, used in many fields today. Their biggest advantage is their extremely high efficiency and power density, a feature that has a huge advantage in the field of drones.

[0003] Existing coreless disc motors mainly use two stator structures: one is a printed winding structure, and the other is a structure formed by winding round wire and then potting. However, in practical use, these two stator structures are not suitable for high-power motors. When applied to high-power motors, the eddy currents generated by the copper windings increase dramatically. Coupled with the stator's own difficulty in heat dissipation, this can easily cause the stator to burn out. Therefore, they are only suitable for low-power motors with a power of a few hundred watts or less. For current low-altitude economical UAVs, this low power is far from meeting the usage requirements. Therefore, there is an urgent need to develop a coreless disc motor suitable for high-power applications. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a high-power coreless disc motor that can effectively reduce eddy currents, reduce heat generation, and also provide rapid heat dissipation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a high-power coreless disc motor having a housing, with a front end cover and a rear end cover at both ends of the housing, a main shaft, a stator assembly, and a rotor assembly inside the housing, the stator assembly including a stator frame and multiple coils, the coils being flat wire windings with one narrow side and one wide side, the multiple coils being arranged around the main shaft on both sides of the stator frame, with the narrow side facing the main shaft, heat pipes being provided between adjacent coils, and rotor assemblies being provided at both ends of the stator assembly, the rotor assemblies being mounted on the main shaft.

[0006] In the above technical solution, the coils on both sides of the stator frame are arranged alternately.

[0007] In the above technical solution, the coils are evenly arranged on the stator frame along the circumference of the main shaft.

[0008] In the above technical solution, the heat pipe includes a round heat-absorbing end and a flat heat-dissipating end. The heat-absorbing end is located in the middle of the coil, and the heat-dissipating end abuts against the housing.

[0009] In the above technical solution, the heat pipe is a capillary heat pipe formed by sintering copper tubes with copper powder.

[0010] In the above technical solution, the stator frame is provided with a limiting groove, and the heat pipe is embedded in the limiting groove.

[0011] In summary, the advantages of the technical solution of this utility model compared with traditional technical means are as follows: the stator assembly of this utility model adopts flat wire winding, and the narrow side direction is aligned with the magnetic field line direction, which greatly reduces eddy currents in the magnetic field of copper wire and reduces the heat generation of the winding. Moreover, heat pipes are added to the stator to quickly conduct the heat of the winding to the motor housing, accelerate the heat dissipation of the winding, maintain extremely high efficiency and power density in high-power motors, and also maintain normal temperature. Attached Figure Description

[0012] The foregoing and other objects, features and advantages of this invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 for Figure 1 A cross-sectional view;

[0015] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0016] Figure 4 This is a three-dimensional structural diagram of the present invention without the end caps and the main shaft;

[0017] Figure 5 for Figure 4 Exploded view;

[0018] Figure 6 for Figure 5 A magnified view of a portion of the image;

[0019] Figure 7 This is a front view schematic diagram of the coil in this utility model;

[0020] The following are the labels: 100, housing; 110, front cover; 120, rear cover; 200, spindle; 300, stator assembly; 310, coil; 311, narrow side; 312, wide side; 320, stator frame; 321, limiting groove; 400, rotor assembly; 500, heat pipe; 510, heat absorption end; 520, heat dissipation end. Detailed Implementation

[0021] Based on the preferred embodiments of this utility model, and through the following description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

[0022] The present invention will be further described with reference to the following figures:

[0023] like Figures 1-7 As shown, a high-power coreless disc motor has a housing 100, with a front cover 110 and a rear cover 120 at both ends of the housing 100. The housing 100 contains a main shaft 200, a stator assembly 300, and a rotor assembly 400. The stator assembly 300 includes multiple coils 310 and a stator frame 320. The coils 310 are flat wire windings with a narrow side 311 and a wide side 312 on one side. The multiple coils 310 are arranged around the main shaft 200 on both sides of the stator frame 320, with the narrow side 311 facing the main shaft 200. Heat pipes 500 are provided between adjacent coils 310. The stator assembly 300 has rotor assemblies 400 at both ends and is mounted on the main shaft 200.

[0024] like Figure 5 , 6 As shown, the coils 310 on both sides of the stator frame 320 are arranged alternately.

[0025] like Figure 4 , 5 As shown, the coils 310 are evenly arranged on the stator frame 320 along the circumference of the main shaft 200.

[0026] like Figure 2 , 3 As shown, the heat pipe 500 includes a round heat-absorbing end 510 and a flat heat-dissipating end 520. The heat-absorbing end 510 is disposed in the middle of the coil 310, and the heat-dissipating end 520 abuts against the housing 100.

[0027] The heat pipe 500 is a capillary heat pipe made of copper tube and copper powder sintered together. The thermal conductivity of the resin glue used for traditional potting is 0.6 to 0.8, while the thermal conductivity of the heat pipe 500 can reach 2 to 3 W. Therefore, the heat pipe 500 between the coils 310 can achieve efficient heat conduction, conduct heat to the housing 100, and quickly dissipate the heat in the motor.

[0028] like Figure 5 As shown, the stator frame 320 is provided with a limiting groove 321, and the heat pipe 500 is embedded in the limiting groove 321.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-power coreless disc motor, comprising a housing, wherein a front cover and a rear cover are respectively provided at both ends of the housing, and a main shaft, a stator assembly and a rotor assembly are disposed within the housing, characterized in that: The stator assembly includes a stator frame and multiple coils. The coils are flat wire windings with one narrow side and one wide side. The multiple coils are arranged around the main shaft on both sides of the stator frame, with the narrow side facing the main shaft. Heat pipes are provided between adjacent coils. Rotor assemblies are provided at both ends of the stator assembly, and the rotor assemblies are mounted on the main shaft.

2. The high-power coreless disc motor according to claim 1, characterized in that: The coils on both sides of the stator frame are arranged alternately.

3. The high-power coreless disc motor according to claim 1, characterized in that: The coils are evenly arranged on the stator frame along the circumference of the main shaft.

4. The high-power coreless disc motor according to claim 1, characterized in that: The heat pipe includes a round heat-absorbing end and a flat heat-dissipating end. The heat-absorbing end is located in the middle of the coil, and the heat-dissipating end abuts against the housing.

5. The high-power coreless disc motor according to claim 1, characterized in that: The heat pipe is a capillary heat pipe made of copper tube and copper powder sintered together.

6. The high-power coreless disc motor according to claim 1, characterized in that: The stator frame is provided with a limiting groove, and the heat pipe is embedded in the limiting groove.

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