A stator assembly and an outer rotor motor using the same
By adding a second convex rib and strengthening end insulation on the insulating sheet, the problem of too small electrical gap in the existing outer rotor motor is solved, the electrical gap and creepage distance are increased, the risk of leakage is reduced, and it is suitable for high-altitude areas.
Patent Information
- Application Number
- CN202420957477.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In existing external rotor motors, the electrical gap between the stator winding, the stator core and the inner wall of the rotor is too small, resulting in insufficient creepage distance, especially in high altitude areas.
By adding a second convex rib on the top surface of the insulating sheet, the electrical gap between the stator winding and the stator core is increased, and the outer edge of the insulating end is covered outside the insulating sheet, thereby enhancing the insulation effect, thereby increasing the electrical gap between the stator winding and the inner wall of the rotor.
It effectively increases the electrical gap between the stator winding and the stator core and the inner wall of the rotor, increases the creepage distance, reduces the risk of leakage, and is suitable for high-altitude areas.
Smart Images
Figure CN222750224U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a stator component and an outer rotor motor using the same. Background Art
[0002] The existing outer rotor motor includes a stator assembly and an outer rotor assembly. The stator assembly includes a stator core, an insulating sheet, a stator winding and end insulation. The stator core includes a yoke, a plurality of teeth are radially extended from the yoke, and wire grooves are formed between the teeth. Insulating sheets are respectively provided on the two end faces of the stator core. The insulating sheet includes an insulating yoke corresponding to the yoke and an insulating tooth corresponding to the tooth. Insulating grooves are formed between the insulating tooth portions. The stator winding is wound on the teeth and the insulating tooth portions. The stator winding is also covered with end insulation. The thickness of the existing insulating sheet is 4mm, and the end insulation does not cover the insulating sheet. The electrical clearance between the stator winding and the stator core and the inner wall of the rotor is less than 5mm. Motors of this structure are generally used in environments below 1,000 meters above sea level. For high-altitude areas, this electrical spacing is too small, which is easy to cause the risk of leakage. Therefore, it is necessary to increase the electrical clearance between the stator winding and the stator core and the inner wall of the rotor. Utility Model Content
[0003] The utility model provides a stator assembly and an outer rotor motor using the same, which are used to solve the technical problem in the prior art that the electrical clearance between the stator winding and the stator core and the inner wall of the rotor is too small, resulting in insufficient creepage distance.
[0004] The technical solution of the utility model is achieved in this way:
[0005] The first object of the utility model is to provide a stator assembly, comprising a stator core, the stator core comprising a yoke, the yoke radially extending a plurality of tooth portions, wire embedding grooves formed between the tooth portions, insulating sheets respectively arranged on the two end surfaces of the stator core, the insulating sheets comprising an insulating yoke portion arranged corresponding to the yoke, and insulating tooth portions arranged corresponding to the tooth portions, insulating grooves formed between the insulating tooth portions, the stator winding is wound on the tooth portions and the insulating tooth portions, and the stator winding is also covered with end insulation, characterized in that: a first rib is axially protruded from the bottom surface of the insulating sheet, the first rib is supported on the end surface of the stator core, a second rib is axially protruded from the top surface of the insulating sheet, the stator winding is wound on the second rib, and the outer edge of the end insulation is covered outside the insulating sheet.
[0006] The second ribs are arranged on both side edges of the insulating tooth portion.
[0007] The end of the second rib radially extends to the insulating yoke.
[0008] The first rib is arranged on the edges of the insulating tooth portion and the insulating yoke portion.
[0009] The outer edge of the end insulation is covered outside the insulation sheet, specifically: the outer ring of the end insulation axially protrudes with an annular enclosure, the enclosure surrounds the outer periphery of the insulation sheet, and the bottom of the enclosure presses on the end face of the stator core.
[0010] The inner wall of the outer ring of the end insulation is provided with an annular spacer, and the spacer is pressed on the second convex rib of the insulation sheet.
[0011] A first buckle is protruded from the inner side of the insulating yoke of the insulating sheet, and a second buckle is protruded from the bottom of the inner circle of the end insulation, and the first buckle and the second buckle are buckled together.
[0012] The second object of the utility model is to provide an outer rotor motor, comprising a stator assembly and an outer rotor assembly, wherein the outer rotor assembly is provided with a rotating shaft, the stator assembly is installed in the inner cavity of the outer rotor assembly and connected to the rotating shaft, and is characterized in that: the stator assembly is the stator assembly described above.
[0013] Compared with the prior art, the utility model has the following advantages:
[0014] 1. The stator assembly comprises a stator core, the stator core comprises a yoke, the yoke radially extends a plurality of teeth, wire embedding grooves are formed between the teeth, insulating sheets are respectively provided on the two end surfaces of the stator core, the insulating sheets comprise insulating yokes corresponding to the yokes, and insulating teeth corresponding to the teeth, insulating grooves are formed between the insulating teeth, the stator winding is wound on the teeth and the insulating teeth, and the stator winding is also covered with end insulation, characterized in that: the bottom surface of the insulating sheet axially protrudes with a first rib, the first rib is supported on the end surface of the stator core, the top surface of the insulating sheet axially protrudes with a second rib, the stator winding is wound on the second rib, and the outer edge of the end insulation is covered outside the insulating sheet. By adding the second rib on the top surface of the insulating sheet, the electrical clearance between the stator winding and the stator core is increased, and at the same time, it is convenient to tie the stator winding; by covering the outer edge of the end insulation outside the insulating sheet, the insulation effect is enhanced, thereby increasing the electrical clearance between the stator winding and the inner wall of the rotor and increasing the creepage distance.
[0015] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of the structure of a stator assembly provided in Embodiment 1 of the present utility model;
[0017] Figure 2 is a side view of a stator assembly;
[0018] Figure 3 for Figure 2 AA cross-sectional view of
[0019] Figure 4 for Figure 3 A magnified view of point B;
[0020] Figure 5 This is an exploded view of the stator assembly;
[0021] Figure 6 is a schematic diagram of the structure of the insulating sheet in the stator assembly;
[0022] Figure 7 It is a structural schematic diagram of the insulating sheet from another angle;
[0023] Figure 8 It is a schematic diagram of the structure of the end insulation in the stator assembly;
[0024] Fig. 9 This is a schematic diagram of the structure of the outer rotor motor provided in the second embodiment of the utility model. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.
[0026] Embodiment 1:
[0027] like Figures 1 to 8 As shown, the present embodiment provides a stator assembly, including a stator core 1, the stator core 1 including a yoke 11, the yoke 11 radially extending a plurality of teeth 12, wire embedding grooves 13 formed between the teeth 12, insulating sheets 2 are respectively provided on the two end faces 14 of the stator core 1, the insulating sheet 2 includes an insulating yoke 21 arranged corresponding to the yoke 11, and insulating teeth 22 arranged corresponding to the teeth 12, insulating grooves 23 are formed between the insulating teeth 22, the stator winding 3 is wound on the teeth 12 and the insulating teeth 22, and the stator winding 3 is also covered with an end insulation 4, characterized in that: a first rib 25 is axially protruded from the bottom surface of the insulating sheet 2, the first rib 25 is supported on the end surface 14 of the stator core 1, a second rib 24 is axially protruded from the top surface of the insulating sheet 2, the stator winding 3 is wound on the second rib 24, and the outer edge of the end insulation 4 is covered outside the insulating sheet 2.
[0028] The stator assembly increases the electrical gap between the stator winding 3 and the stator core 1 by adding a second rib 24 on the top surface of the insulating sheet 2, and facilitates the wire binding of the stator winding 3; the outer edge of the end insulation 4 is covered outside the insulating sheet 2 to enhance the insulation effect, thereby increasing the electrical gap between the stator winding 3 and the inner wall of the rotor.
[0029] The second ribs 24 are arranged on the edges of both sides of the insulating tooth portion 22. The structure is simple, and the weight and cost of the insulating sheet 2 do not change much.
[0030] The end of the second rib 24 radially extends to the insulating yoke 21. This strengthens the connection between the second rib 24 and the top surface of the insulating sheet 2, and also strengthens the hardness of the insulating sheet 2.
[0031] The first rib 25 is disposed on the edges of the insulating tooth portion 22 and the insulating yoke portion 21 .
[0032] The outer edge of the end insulation 4 is covered outside the insulation sheet 2, specifically: the outer ring of the end insulation 4 axially protrudes with an annular enclosure 41, the enclosure 41 surrounds the outer periphery of the insulation sheet 2, and the bottom of the enclosure 41 is pressed on the end face 14 of the stator core 1. The structure is simple, and the insulation effect between the stator winding 3 and the inner wall of the rotor is ensured.
[0033] The inner wall of the outer ring of the end insulation 4 is provided with an annular spacer 42, and the spacer 42 is pressed on the second rib 24 of the insulation sheet 2, so as to further ensure the electrical gap between the stator winding 3 and the stator core 1.
[0034] The insulating yoke 21 of the insulating sheet 2 has a first buckle 26 protruding from the inner side, and the bottom of the inner circle of the end insulation has a second buckle 43 protruding from the bottom. The first buckle 26 and the second buckle 43 are buckled together. The first buckle 26 and the second buckle 43 are buckled together to prevent the end insulation 4 from loosening.
[0035] The stator assembly described in this embodiment can make the electrical gap between the stator winding 3 and the stator core 1 ≥5 mm, and the electrical gap between the stator winding 3 and the inner wall of the rotor ≥5 mm.
[0036] Embodiment 2:
[0037] like Fig. 9 As shown, this embodiment provides an outer rotor motor, including a stator assembly 100 and an outer rotor assembly 5, the outer rotor assembly 5 is provided with a rotating shaft 51, the stator assembly 100 is installed in the inner cavity of the outer rotor assembly 5 and connected to the rotating shaft 51, and is characterized in that: the stator assembly 100 is the stator assembly described in Example 1.
[0038] By improving the structure of the stator assembly, the electrical clearance inside the stator assembly 100 and between the stator assembly 100 and the outer rotor assembly 5 is enhanced, ensuring that the electrical clearance between the stator winding 3 and the stator core 1 is ≥5mm, and the electrical clearance between the stator winding 3 and the inner wall of the rotor is ≥5mm, so that the outer rotor motor can be suitable for areas with an altitude of 5000m.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A stator assembly, comprising a stator core (1), the stator core (1) comprising a yoke (11), the yoke (11) radially extending a plurality of teeth (12), wire embedding grooves (13) formed between the teeth (12), insulating sheets (2) respectively provided on two end surfaces (14) of the stator core (1), the insulating sheet (2) comprising an insulating yoke (21) arranged corresponding to the yoke (11), and insulating teeth (22) arranged corresponding to the teeth (12), insulating grooves (23) formed between the insulating teeth (22), a stator winding (3) wound on the teeth (12) and the insulating teeth (22), the stator winding (3) further covered with end insulation (4), characterized in that: A first convex rib (25) protrudes axially from the bottom surface of the insulating sheet (2), the first convex rib (25) is supported on the end surface (14) of the stator core (1), a second convex rib (24) protrudes axially from the top surface of the insulating sheet (2), the stator winding (3) is wound on the second convex rib (24), and the outer edge of the end insulation (4) is covered outside the insulating sheet (2).
2. A stator assembly according to claim 1, characterized in that: The second convex ribs (24) are arranged on the edges of both sides of the insulating tooth portion (22).
3. A stator assembly according to claim 2, characterized in that: The end of the second rib (24) radially extends onto the insulating yoke (21).
4. A stator assembly according to claim 2, characterized in that: The first convex rib (25) is arranged on the edges of the insulating tooth portion (22) and the insulating yoke portion (21).
5. A stator assembly according to any one of claims 1 to 4, characterized in that: The outer edge of the end insulation (4) is covered outside the insulation sheet (2), specifically: an annular enclosure (41) protrudes axially from the outer ring of the end insulation (4), the enclosure (41) surrounds the outer periphery of the insulation sheet (2), and the bottom of the enclosure (41) is pressed on the end surface (14) of the stator core (1).
6. A stator assembly according to claim 5, characterized in that: An annular spacer (42) is provided on the inner wall of the outer ring of the end insulation (4), and the spacer (42) is pressed on the second convex rib (24) of the insulation sheet (2).
7. A stator assembly according to claim 6, characterized in that: A first buckle (26) is protruded from the inner side of the insulating yoke (21) of the insulating sheet (2), a second buckle (43) is protruded from the bottom of the inner circle of the end insulation (4), and the first buckle (26) and the second buckle (43) are buckled together.
8. An outer rotor motor, comprising a stator assembly (100) and an outer rotor assembly (5), wherein the outer rotor assembly (5) is provided with a rotating shaft (51), and the stator assembly (100) is installed in an inner cavity of the outer rotor assembly (5) and connected to the rotating shaft (51), characterized in that: The stator assembly (100) is the stator assembly according to any one of claims 1 to 7.