Stator assembly and external rotor motor

Abstract

The utility model discloses a stator assembly and an external rotor motor, and relates to the technical field of permanent magnet synchronous motors. A stator base embedded in the inner peripheral portion of the stator core; the flat wire winding is embedded in a tooth groove of the stator iron core; a plurality of binding posts are reserved on the busbar; the insulating base is used for mounting a busbar and is arranged at the end part of the stator base; and the end part of each flat wire winding extends to the end part of the stator iron core and is connected with the corresponding binding post. By using the stator assembly provided by the utility model, the size and the weight of the whole machine can be effectively reduced, and the power density of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet synchronous motors, and more specifically, to a stator assembly and an outer rotor motor comprising the stator assembly. Background Art

[0002] In the prior art, electric aviation electric propulsion systems usually use round wire windings. The length of the winding ends is too long, the axial length of the motor is too long, and the volume is larger, which cannot effectively reduce the volume and weight. In other words, the current round wire windings cannot meet the high power density requirements of aviation drive motors.

[0003] In summary, how to effectively reduce the volume and weight of the entire machine and improve the power density of the motor is a problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a stator assembly that can effectively reduce the volume and weight of the entire machine and improve the power density of the motor. Another object of the present invention is to provide an outer rotor motor including the above-mentioned stator assembly.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A stator assembly, comprising:

[0007] stator core;

[0008] A stator base, which is embedded in the inner periphery of the stator core;

[0009] A flat wire winding, which is embedded in the tooth slots of the stator core;

[0010] A bus bar, which is provided with a number of terminals;

[0011] An insulating base, which is used to install the busbar, and the insulating base is arranged at the end of the stator base;

[0012] The end of each flat wire winding extends to the end of the stator core and is connected to the corresponding terminal.

[0013] In one embodiment, the inner circle of the busbar is a U-phase copper bar, and the outer circle of the busbar includes a V-phase copper bar, a W-phase copper bar and an N-phase copper bar; the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the N-phase copper bar are all arranged in layered insulation.

[0014] In one embodiment, the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the N-phase copper bar are all arc-shaped structures.

[0015] In one embodiment, the stator base and the insulating base are detachably connected.

[0016] In one embodiment, the flat wire winding and the terminal are connected by welding.

[0017] In one embodiment, when the voltage level of the bus is 500V, the minimum creepage distance of the bus is not less than 3.6mm; when the voltage level of the bus is 630V, the minimum creepage distance of the bus is not less than 4.5; when the voltage level of the bus is 800V, the minimum creepage distance of the bus is not less than 5.6mm.

[0018] In one embodiment, the cross-sectional area of ​​the busbar is greater than the product of the cross-sectional area of ​​the flat wire of the flat wire winding and half the number of parallel branches of the flat wire winding.

[0019] An outer rotor motor comprises the stator assembly described in any one of the above items.

[0020] When using the stator assembly provided by the utility model, first, each flat wire winding is embedded in each tooth slot of the stator core; then, the stator base is embedded in the inner periphery of the stator core; then, the insulating base is installed to the end of the stator base; then, the busbar is installed in the insulating base; finally, the protruding end of the flat wire winding extending to the end of the stator core is connected to the busbar to complete the assembly operation of the device. By using the flat wire winding and the busbar, the device can effectively reduce the volume and weight of the whole machine and improve the power density of the motor.

[0021] In summary, the stator assembly provided by the utility model can effectively reduce the volume and weight of the entire machine and improve the power density of the motor.

[0022] In addition, the utility model also provides an outer rotor motor including the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the flat wire winding of the stator assembly provided by the utility model;

[0025] Figure 2 It is a structural schematic diagram of the stator core;

[0026] Figure 3 It is a structural schematic diagram of the stator base;

[0027] Figure 4 It is a structural schematic diagram of an insulating base;

[0028] Figure 5 for Figure 4 A top view of

[0029] Figure 6 is a schematic diagram of the structure of the bus;

[0030] Figure 7 is a structural schematic diagram of a stator assembly;

[0031] Figure 8 is a rear view of the stator assembly;

[0032] Fig. 9 The stator assembly is a front view of the stator assembly.

[0033] Figure 1-Figure 9 middle:

[0034] 1 is the stator core, 2 is the stator base, 3 is the flat wire winding, 4 is the bus bar, 5 is the insulating base, and 6 is the terminal. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The core of the utility model is to provide a stator assembly, which can effectively reduce the volume and weight of the whole machine and improve the power density of the motor. Another core of the utility model is to provide an outer rotor motor including the above stator assembly.

[0037] Please refer to Figures 1 to 9 .

[0038] This specific embodiment provides a stator assembly, including:

[0039] Stator core 1;

[0040] A stator base 2, which is embedded in the inner periphery of the stator core 1;

[0041] The flat wire winding 3 is embedded in the tooth slots of the stator core 1;

[0042] A bus bar 4, which is provided with a plurality of terminals 6;

[0043] An insulating base 5, which is used to install the busbar 4, and the insulating base 5 is arranged at the end of the stator base 2;

[0044] The ends of each flat wire winding 3 extend to the ends of the stator core 1 and are connected to corresponding terminals 6 .

[0045] It should be noted that the flat wire winding 3 used in this system can effectively reduce the length of the winding end and improve the power density of the motor. Moreover, the flat wire winding 3 is connected to the bus 4 through an insulating base, which not only protects the flat wire winding 3 and makes the end of the flat wire winding 3 less likely to be damaged, but also ensures the electrical isolation of the flat wire winding 3 from the bus. In addition, the flat wire winding 3 is placed from the side of the stator core 1, and when a coil of a flat wire winding 3 is damaged, it can be quickly replaced. By setting components such as the flat wire winding 3, the bus 4, and the insulating base 5, this system further reduces the size of the motor, effectively reduces the volume and weight of the entire machine, and improves the power density of the motor, so that the device meets the high power density requirements of aviation drive motors.

[0046] In actual use, the shape, structure, size, material, position, etc. of the stator core 1, the stator base 2, the flat wire winding 3, the busbar 4 and the insulating base 5 can be determined according to actual conditions and actual needs.

[0047] When using the stator assembly provided by the utility model, first, each flat wire winding 3 is embedded in each tooth slot of the stator core 1; then, the stator base 2 is embedded in the inner periphery of the stator core 1; then, the insulating base 5 is installed to the end of the stator base 2; then, the busbar 4 is installed in the insulating base 5; finally, the protruding end of the flat wire winding 3 extending to the end of the stator core 1 is connected to the busbar 4 to complete the assembly operation of the device. By using the flat wire winding 3 and the busbar 4, the device can effectively reduce the volume and weight of the whole machine and improve the power density of the motor.

[0048] In summary, the stator assembly provided by the utility model can effectively reduce the volume and weight of the entire machine and improve the power density of the motor.

[0049] In one embodiment, the inner ring of the busbar 4 is a U-phase copper bar, and the outer ring of the busbar 4 includes a V-phase copper bar, a W-phase copper bar, and an N-phase copper bar; the U-phase copper bar, the V-phase copper bar, the W-phase copper bar, and the N-phase copper bar are all arranged in layers for insulation. The copper bars of each phase of the busbar 4 are arranged in layers and are respectively embedded in the insulating base 5, which can ensure that each U-phase copper bar, V-phase copper bar, W-phase copper bar, and N-phase copper bar are insulated and isolated from each other.

[0050] In one embodiment, the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the N-phase copper bar are all arc-shaped structures, so as to be easily assembled to the end of the stator core 1, making the overall structure of the device more compact. Among them, a plurality of concentrically distributed annular grooves can be provided on the stator base 2 to install the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the N-phase copper bar in layers.

[0051] In one embodiment, the stator base 2 and the insulating base 5 are detachably connected. When one of the stator base 2 and the insulating base 5 is damaged, the other damaged parts can be disassembled through a disassembly operation, and then the new parts can be assembled and used with other undamaged parts to reduce the maintenance cost of the device and increase the service life of the device.

[0052] It should be noted that a first platform can be arranged along the radial extension on the inner periphery of the insulating base 5, and a plurality of first platforms are evenly distributed along the circumference of the insulating base 5, and a second platform is arranged on the outer periphery of the stator base 2, and the second platform and the first platform are distributed correspondingly, and bolt holes for installing bolts can be arranged correspondingly on the first platform and the second platform to achieve the connection effect between the insulating base 5 and the stator base 2.

[0053] In one embodiment, the flat wire winding 3 and the terminal 6 are connected by welding to improve the connection relationship between the flat wire winding 3 and the terminal 6 .

[0054] In one embodiment, when the voltage level of busbar 4 is 500V, the minimum creepage distance of busbar 4 is not less than 3.6mm; when the voltage level of busbar 4 is 630V, the minimum creepage distance of busbar 4 is not less than 4.5; when the voltage level of busbar 4 is 800V, the minimum creepage distance of busbar 4 is not less than 5.6mm.

[0055] In one embodiment, the cross-sectional area of ​​the busbar 4 is greater than the product of the cross-sectional area of ​​the flat wire of the flat wire winding 3 and half the number of parallel branches of the flat wire winding 3. The number of parallel branches of the flat wire winding 3 can be set to 8, and the cross-sectional area of ​​the busbar 4 should be greater than four times the cross-sectional area of ​​the flat wire of the flat wire winding 3. This design can ensure the current conduction of the busbar 4 and the optimal weight of the busbar 4.

[0056] In addition to the above-mentioned stator assembly, the present invention also provides an outer rotor motor including the stator assembly disclosed in the above-mentioned embodiment. For the structures of other parts of the outer rotor motor, please refer to the prior art and will not be described in detail herein.

[0057] In addition, it should be noted that the orientation or positional relationship indicated by "inside and outside" etc. in the present invention is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of simplifying the description and facilitating understanding, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other. Any combination of all embodiments provided by the utility model is within the protection scope of this utility model and will not be described in detail here.

[0059] The stator assembly and the outer rotor motor provided by the utility model are introduced in detail above. The principle and implementation method of the utility model are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A stator assembly, characterized in that: include: Stator core (1); A stator base (2) embedded in the inner periphery of the stator core (1); A flat wire winding (3) embedded in the tooth slots of the stator core (1); A busbar (4) having a plurality of terminal posts (6) reserved therefor; An insulating base (5) for mounting the busbar (4), the insulating base (5) being arranged at an end of the stator base (2); The end of each flat wire winding (3) extends to the end of the stator core (1) and is connected to the corresponding terminal (6).

2. The stator assembly according to claim 1, characterized in that: The inner ring of the busbar (4) is a U-phase copper bar, and the outer ring of the busbar (4) includes a V-phase copper bar, a W-phase copper bar, and an N-phase copper bar; the U-phase copper bar, the V-phase copper bar, the W-phase copper bar, and the N-phase copper bar are all arranged in layered insulation.

3. The stator assembly according to claim 2, characterized in that: The U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the N-phase copper bar are all arc-shaped structures.

4. The stator assembly according to any one of claims 1 to 3, characterized in that: The stator base (2) and the insulating base (5) are detachably connected.

5. The stator assembly according to any one of claims 1 to 3, characterized in that: The flat wire winding (3) and the terminal (6) are connected by welding.

6. The stator assembly according to any one of claims 1 to 3, characterized in that: When the voltage level of the busbar (4) is 500V, the minimum creepage distance of the busbar (4) is not less than 3.6mm; when the voltage level of the busbar (4) is 630V, the minimum creepage distance of the busbar (4) is not less than 4.5; when the voltage level of the busbar (4) is 800V, the minimum creepage distance of the busbar (4) is not less than 5.6mm.

7. The stator assembly according to any one of claims 1 to 3, characterized in that: The cross-sectional area of ​​the busbar (4) is greater than the product of the cross-sectional area of ​​the flat wire of the flat wire winding (3) and half the number of parallel branches of the flat wire winding (3).

8. An outer rotor motor, characterized in that: A stator assembly comprising any one of claims 1 to 7.

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