Stator capable of shortening creepage heights of two ends of flat wire of new energy motor

Abstract

The utility model discloses a stator capable of shortening creepage heights of two ends of a flat wire of a new energy motor, which belongs to the technical field of stators and comprises an iron core and a flat wire winding. Insulating glue is injected into the plurality of iron core grooves, and after the insulating glue is uniformly injected into the iron core grooves, no gap exists in the iron core grooves; the flat wire winding comprises a flat wire winding A end and a flat wire winding B end, each of the flat wire winding A end and the flat wire winding B end comprises a plurality of coils, and the plurality of coils are rotationally and symmetrically distributed around the axis of the iron core. Coil materials, cost and resources can be saved, the creepage distance can be shortened, and the motor efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stators, and in particular relates to a stator capable of shortening the creepage height of both ends of a flat wire of a new energy motor. Background Art

[0002] With the continuous development of electric vehicles, the power density of electric vehicle motors is also increasing. Compared with round wire motors, flat wire motors have a higher slot fill rate. The increase in slot fill rate means that more copper wire can be packed into the same space, generating a stronger magnetic field and further improving power density.

[0003] The flat wire motor includes a rotor and a flat wire stator. The flat wire stator includes an iron core and a flat wire winding. The winding method of the flat wire winding will affect the performance, process and other aspects of the flat wire motor. The flat wire winding in the flat wire motor is welded by a hairpin-type flat wire inserted into the iron core slot. In related technologies, insulating materials, such as insulating paper, are provided in the iron core slot to insulate the flat wire winding from the iron core slot. Since the two ends of the insulating paper need to be exposed at both ends of the stator, the straight part of the flat wire winding is usually longer. This wastes materials on the one hand and increases the creepage height of the wire on the other hand, thereby reducing the efficiency of the motor. Utility Model Content

[0004] The purpose of the utility model is to overcome the technical problems in the prior art that the two ends of the flat wire of the new energy motor are long, the creepage height of the stator wire is large, and the motor efficiency is reduced, and to provide a stator that can shorten the creepage height of the two ends of the flat wire of the new energy motor to improve the motor efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a stator capable of shortening the creepage height of the two ends of the flat wire of a new energy motor, comprising an iron core and a flat wire winding, wherein the iron core has a plurality of iron core slots; the interior of the plurality of iron core slots is filled with insulating glue, and the insulating glue is evenly injected into the interior of the iron core slots so that there is no gap inside; the flat wire winding comprises a flat wire winding A end and a flat wire winding B end, and the flat wire winding A end and the flat wire winding B end each comprise a plurality of coils, and the plurality of coils are rotationally symmetrically distributed around the axis of the iron core, and the coils are wound in the plurality of iron core slots; the flat wire winding The part of the A end extending out of the core slot is provided with an A-end bent part and an A-end straight part, and the part of the B end of the flat wire winding extending out of the core slot is provided with a B-end straight part and a B-end straight part. After the core slot is injected with glue, the length of the A-end straight part in the A end of the flat wire winding is 0.6-1.2 mm, and the length of the B-end straight part in the B end of the flat wire winding is 2.1-2.8 mm; the core part also includes a yoke and a tooth part connected to the yoke part, and the tooth part is spaced apart from the core slot. A glue injection hole is opened on the core, and the core is fixed and stacked after glue is injected into the glue injection hole.

[0006] As a further improvement measure to be invented, the above-mentioned stator capable of shortening the creepage height of the two ends of the flat wire of the new energy motor, the length of the straight portion of the A end of the flat wire winding A is 1.0 mm to 1.2 mm.

[0007] As a further improvement measure to be invented, the above-mentioned stator capable of shortening the creepage height of the flat wires at both ends of the new energy motor, the length of the straight portion of the B end of the flat wire winding is 2.5 mm to 2.8 mm.

[0008] As a further improvement measure to be invented, the above-mentioned stator capable of shortening the creepage height at both ends of the flat wire of the new energy motor, the iron core stack is laser welded to make the glue injection holes neat.

[0009] As a further improvement measure to be invented, in the above-mentioned stator capable of shortening the creepage height of both ends of the flat wire of the new energy motor, the glue injection hole rings are opened in a rotationally symmetrical distribution around the axis of the iron core.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. After the flat wire winding is connected to the iron core, the insulating glue is injected into the iron core slot. The insulating glue fills the iron core slot and then solidifies it using a curing device. This allows the iron core slot to be filled with insulating material, leaving no gaps inside the iron core slot. This also ensures that there is no gap between the coil and the iron core slot, allowing the coil to be stably connected to the iron core slot. This ensures the insulation effect between the coil and the iron core slot and increases the stability of the connection between the coil and the iron core slot.

[0012] 2. The method of injecting insulating glue into the core slot can shorten the length of the straight portion of end A of the flat wire winding and the length of the straight portion of end B of the flat wire winding compared to the traditional method of using insulating paper. This can save a lot of coil material, which can save costs and resources on the one hand, and reduce creepage distance and improve motor efficiency on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the present utility model.

[0014] Figure 2 It is the main view of the utility model.

[0015] Figure 3 It is a top view of the utility model.

[0016] Figure 4 for Figure 2 Middle AA section view.

[0017] Figure 5 for Figure 4 Enlarged view of part C in the middle.

[0018] Figure 6 for Figure 3 Middle BB section view.

[0019] Explanation of the accompanying reference numerals: 1. Iron core; 11. Iron core slot; 12. Yoke; 13. Tooth; 2. Flat wire winding; 21. Flat wire winding end A; 211. Bent portion of end A; 212. Straight portion of end A; 22. Flat wire winding end B; 221. Bent portion of end B; 222. Straight portion of end B; 3. Glue injection hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 6 As shown, the utility model provides a stator capable of shortening the creepage height of both ends of the flat wire of a new energy motor, comprising an iron core 1 and a flat wire winding 2, wherein the iron core 1 has a plurality of iron core slots 11; the interior of the plurality of iron core slots 11 is filled with insulating glue, and after the insulating glue is evenly injected into the iron core slots 11, there is no gap between the iron core slots 11 and the flat wire winding 2 located in the iron core slots 11; the iron core 1 also includes a yoke 12 and a tooth 13 connected to the yoke 12, and the tooth 13 is spaced apart from the iron core slots 11; the flat wire winding 2 is inserted into the iron core slots 11, Then, after the insulating glue is injected into the interior of the core slot 11, the insulating glue fills the interior of the core slot 11, and then it is cured by using a curing device, thereby filling the interior of the core slot 11 with insulating material, leaving no gaps inside the core slot 11, and further leaving no gaps between the flat wire winding 2 and the core slot 11, so that the flat wire winding 2 can be stably inserted into the interior of the core slot 11. On the one hand, the insulation effect between the flat wire winding 2 and the core slot 11 can be guaranteed, and on the other hand, the stability of the connection between the flat wire winding 2 and the core slot 11 can be increased.

[0022] The flat wire winding 2 includes a flat wire winding A end 21 and a flat wire winding B end 22. Both the flat wire winding A end 21 and the flat wire winding B end 22 include multiple coils, and the multiple coils are rotationally symmetrically distributed around the axis of the iron core 1; the part of the flat wire winding A end 21 extending out of the iron core slot 11 is provided with an A-end bent portion 211 and an A-end straight portion 212, and the part of the flat wire winding B end 22 extending out of the iron core slot 11 is provided with a B-end straight portion 222 and a B-end straight portion 222. After the inside of the iron core slot 11 is injected with glue, the length of the A-end straight portion 212 in the flat wire winding A end 21 is 1.2 mm, and the length of the B-end straight portion 222 of the flat wire winding B end 22 extending out of the iron core slot 11 is 2.8 mm.

[0023] Compared to the traditional method of using insulating paper, the method of injecting insulating glue into the core slot 11 can shorten the length of the straight portion of the flat wire winding A end 21 and the flat wire winding B end 22 extending out of the core slot 11. In the traditional method of using insulating paper, the length of the straight portion of the flat wire winding A end 21 and the straight portion of the flat wire winding B end 22 extending out of the core slot is both 4.3 mm. However, by injecting insulating glue into the core slot 11, the length of the straight portion 212 of the flat wire winding A end 21 is 0.6 mm to 1.2 mm, and the length of the straight portion 222 of the flat wire winding B end 22 is 2.1 mm to 2.8 mm. This can save a large amount of coil material, saving costs and resources. On the other hand, compared to the traditional method of using insulating paper, it can greatly shorten the creepage distance, save electricity, and improve efficiency.

[0024] The iron core 1 is provided with a glue injection hole 3. After glue is injected into the glue injection hole 3, the iron core 1 is fixed and stacked. After the iron core 1 is stacked and laser welded, the glue injection holes 3 are neat. The glue injection holes 3 are rotationally symmetrically distributed around the axis of the iron core 1. After the iron core 1 is stacked and laser welded, the insulating glue is injected into the glue injection hole 3. Since the iron core 1 is stacked and laser welded, the glue injection holes 3 are neat, and the insulating material is injected into the glue injection hole 3, the stability of the iron core 1 can be further improved to prevent the iron core 1 from being disassembled. In addition, the number of glue injection holes 3 can be designed according to actual conditions to ensure the stability between the iron cores 1 and improve its working stability.

[0025] Manufacturing process: After inserting the flat wire winding 2 into the iron core 1, the ends of the flat wire winding 2 are welded. Then, insulating glue is injected into the core slot 11, filling the interior of the iron core slot 11 with the glue. The glue then solidifies through curing, leaving no gaps inside the iron core slot 11. This, in turn, eliminates any gaps between the coil and the iron core slot 11, ensuring the coil is stably inserted within the iron core slot 11. During manufacturing, the length of the straight portion 212 at the A end is set to 0.6-1.2 mm, and the length of the straight portion 222 at the B end is set to 2.1-2.8 mm.

[0026] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the scope of protection of the present invention.

Claims

1. A stator capable of shortening the creepage height of both ends of the flat wire of a new energy motor, characterized in that: The invention comprises an iron core (1) and a flat wire winding (2), wherein the iron core (1) has a plurality of iron core slots (11); the interior of the plurality of iron core slots (11) is filled with insulating glue, and the insulating glue is evenly injected into the interior of the iron core slots (11) so that there is no gap between the iron core slots (11) and the flat wire winding (2); The flat wire winding (2) comprises a flat wire winding A end (21) and a flat wire winding B end (22), each of the flat wire winding A end (21) and the flat wire winding B end (22) comprising a plurality of coils, the plurality of coils being rotationally symmetrically distributed around the axis of the iron core (1), and the coils being wound in the plurality of iron core slots (11); the portion of the flat wire winding A end (21) extending out of the iron core slot (11) is provided with an A end bent portion (211) and an A end straight portion (212), and the portion of the flat wire winding B end (22) extending out of the iron core slot ( The portion of the iron core slot (11) is provided with a B-end straight portion (221) and a B-end straight portion (222); after the inside of the iron core slot (11) is glue-injected, the length of the A-end straight portion (212) in the A-end (21) of the flat wire winding is 0.6-1.2 mm, and the length of the B-end straight portion (222) in the B-end (22) of the flat wire winding is 2.1-2.8 mm; the iron core (1) portion further includes a yoke portion (12) and a tooth portion (13) connected to the yoke portion (12); the tooth portion (13) is spaced apart from the iron core slot (11); A glue injection hole (3) is provided on the iron core (1), and after glue is injected into the glue injection hole (3), the iron core (1) is fixed and stacked.

2. A stator capable of shortening the creepage height of both ends of the flat wire of a new energy motor according to claim 1, characterized in that: The length of the A-end straight portion (212) of the flat wire winding A-end (21) is 1.0 mm to 1.2 mm.

3. A stator capable of shortening the creepage height of both ends of the flat wire of a new energy motor according to claim 1, characterized in that: The length of the B-end straight portion (222) in the B-end (22) of the flat wire winding is 2.5 mm to 2.8 mm.

4. A stator capable of shortening the creepage height of both ends of a flat wire of a new energy motor according to claim 1, characterized in that: After the iron cores (1) are stacked and laser welded, the glue injection holes (3) are aligned.

5. The stator capable of shortening the creepage height of both ends of the flat wire of a new energy motor according to claim 1, characterized in that: The glue injection holes (3) are rotationally symmetrically distributed around the axis of the iron core (1).

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