Stator structure and internal tooth groove motor with same

Abstract

The stator structure comprises a stator winding and a stator iron core, the stator iron core comprises a groove opening, a groove inner wall and a groove end face, and the groove opening, the groove inner wall and the groove end face are respectively provided with a coating layer. Compared with the prior art, the utility model has the advantages of small notch size, improved slot fullness rate and motor efficiency and the like.

Description

Technical Field

[0001] The utility model relates to an internal slot motor, in particular to a stator structure and an internal slot motor with the stator structure. Background Art

[0002] The existing small internal slot motors currently use insulating paper as slot protection for wire embedding in the core, which is difficult to embed, takes a long time to operate and has a low winding yield.

[0003] For some small internal tooth slot motors, the core can be wound by a winding machine, but the slot opening needs to reserve the running width of the needle. The increase of the slot opening reduces the efficiency and torque performance of the motor. At the same time, the running width of the needle needs to be reserved in the slot, which reduces the slot fill rate and further reduces the efficiency of the motor.

[0004] After searching, Chinese patent publication number CN114157070A discloses an AC motor stator structure, specifically including a stator core and a stator winding, the inner ring of the stator core is provided with an open slot, the slot of the open slot faces the axis of the stator core, the stator winding is partially embedded in the open slot, the width of the open slot is smaller than the width of the slot, and a plurality of slot wedges arranged along the axial direction of the stator core are embedded between the stator winding and the slot, the maximum width of the slot wedge is smaller than the width of the slot, and the side wall of the slot wedge abuts against the inner wall of the open slot. However, the stator of the existing patent has a plurality of slot wedges arranged along the axial direction of the stator core embedded between the stator winding and the slot, and this structure still has problems such as low slot filling rate, inconvenient winding, and low winding yield. Utility Model Content

[0005] The purpose of the utility model is to provide a stator structure and an internal slot motor with the stator structure in order to overcome the defects of the prior art, thereby achieving a small slot size, improving the slot fill rate and the motor efficiency.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a stator structure is provided, which includes a stator winding and a stator core, wherein the stator core includes a slot, a slot inner wall and a slot end surface, and the slot, the slot inner wall and the slot end surface are all provided with a coating layer.

[0008] As a preferred technical solution, the thickness of the coating layer is 0.2-0.3 mm.

[0009] As a preferred technical solution, the positions where the slot opening, the slot inner wall and the slot end surface are in contact with the stator winding are all wrapped by a coating layer to form a closed opening.

[0010] As a preferred technical solution, the cross-section of the inner wall of the groove is a fan-shaped structure.

[0011] As a preferred technical solution, the width of the notch is 0.3-0.6 mm.

[0012] According to another aspect of the utility model, an internal slot motor with a stator structure is provided, comprising a rotor structure and a stator structure, wherein the stator structure comprises a stator winding and a stator core, wherein the stator core comprises a slot, a slot inner wall and a slot end face, and the slot, the slot inner wall and the slot end face are all provided with a coating layer.

[0013] As a preferred technical solution, the thickness of the coating layer is 0.2-0.3 mm.

[0014] As a preferred technical solution, the positions where the slot opening, the slot inner wall and the slot end surface are in contact with the stator winding are all wrapped by a coating layer to form a closed opening.

[0015] As a preferred technical solution, the cross-section of the inner wall of the groove is a fan-shaped structure.

[0016] As a preferred technical solution, the width of the notch is 0.3-0.6 mm.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1) The utility model adopts a coating method to connect the notches of the iron core to form a coated closed mouth, and the notch size can be as small as possible to meet the motor performance;

[0019] 2) The notch of the utility model is coated to form a closed mouth, so as to avoid leakage of the enameled wire and cause skin damage;

[0020] 3) The shape of the inner wall of the core slot of the utility model can be composed of different shapes;

[0021] 4) The threading process applicable to the utility model has higher winding efficiency and manufacturing yield;

[0022] 4) The utility model is applicable to existing coating processes and coating materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the stator structure coating of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the stator structure of the utility model;

[0025] Figure 3 This is a schematic diagram of single-tooth threading of the stator structure of the utility model.

[0026] 1 is the stator winding, 2 is the stator core, 3 is the coating layer, 21 is the slot, 22 is the slot inner wall, and 23 is the slot end face. DETAILED DESCRIPTION

[0027] 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 part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, a stator structure includes a stator winding 1 and a stator core 2, wherein the stator core 2 includes a slot 21, a slot inner wall 22 and a slot end face 23, and the slot 21, the slot inner wall 22 and the slot end face 23 are all provided with a coating layer 3. That is, the utility model connects the slots of the core by coating to form a coated closed mouth, so the slot size can be as small as possible to meet the motor performance.

[0030] The utility model adopts a threading method for winding, which solves the problem of the enameled wire leaking out of the inner side of the iron core and breaking the skin due to the notch not being closed, and at the same time, the slot filling rate is comparable to that of the wire embedding process.

[0031] The positions where the slot opening 21, the slot inner wall 22 and the slot end face 23 are in contact with the stator winding 1 are all wrapped by the coating layer 3 to form a closed opening. The thickness of the coating layer 3 is 0.2-0.3 mm. After the stator core 2 is combined with the coating layer 3, the wire is threaded back and forth in the slot in accordance with the threading process of the utility model of the company to form a qualified stator winding 1 and complete the winding of the stator.

[0032] The cross section of the inner wall 22 of the groove is a fan-shaped structure, which can be adjusted to different shapes according to the electromagnetic characteristics. The groove is closed by coating, and the width of the groove 21 is 0.3-0.6mm.

[0033] Example 2

[0034] like Figure 1 and Figure 2 As shown, an internal slot motor with a stator structure includes a rotor structure and a stator structure, wherein the stator structure includes a stator winding 1 and a stator core 2, wherein the stator core 2 includes a slot 21, a slot inner wall 22 and a slot end face 23, and the slot 21, the slot inner wall 22 and the slot end face 23 are all provided with a coating layer 3.

[0035] The utility model adopts a threading method for winding, which solves the problem of the enameled wire leaking out of the inner side of the iron core and breaking the skin due to the notch not being closed, and at the same time, the slot filling rate is comparable to that of the wire embedding process.

[0036] The positions where the slot opening 21, the slot inner wall 22 and the slot end face 23 are in contact with the stator winding 1 are all wrapped by the coating layer 3 to form a closed opening. The thickness of the coating layer 3 is 0.2-0.3 mm. After the stator core 2 is combined with the coating layer 3, the wire is threaded back and forth in the slot in accordance with the threading process of the utility model of the company to form a qualified stator winding 1 and complete the winding of the stator.

[0037] The cross section of the inner wall 22 of the groove is a fan-shaped structure, which can be adjusted to different shapes according to the electromagnetic characteristics. The groove is closed by coating, and the width of the groove 21 is 0.3-0.6mm.

[0038] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A stator structure, comprising a stator winding (1) and a stator core (2), wherein the stator core (2) comprises a slot (21), a slot inner wall (22) and a slot end surface (23), characterized in that: The groove opening (21), the groove inner wall (22) and the groove end surface (23) are all provided with a coating layer (3).

2. A stator structure according to claim 1, characterized in that: The coating layer (3) has a thickness of 0.2-0.3 mm.

3. A stator structure according to claim 1, characterized in that: The positions where the slot opening (21), the slot inner wall (22) and the slot end surface (23) are in contact with the stator winding (1) are all wrapped by the coating layer (3) to form a closed opening.

4. A stator structure according to claim 1, characterized in that: The cross section of the groove inner wall (22) is a fan-shaped structure.

5. A stator structure according to claim 1, characterized in that: The width of the notch (21) is 0.3-0.6 mm.

6. An internal slot motor with a stator structure, comprising a rotor structure and a stator structure, wherein the stator structure comprises a stator winding (1) and a stator core (2), wherein the stator core (2) comprises a slot opening (21), a slot inner wall (22) and a slot end surface (23), wherein: The groove opening (21), the groove inner wall (22) and the groove end surface (23) are all provided with a coating layer (3).

7. The internal slot motor with a stator structure according to claim 6, characterized in that: The coating layer (3) has a thickness of 0.2-0.3 mm.

8. The internal slot motor with a stator structure according to claim 6, characterized in that: The positions where the slot opening (21), the slot inner wall (22) and the slot end surface (23) are in contact with the stator winding (1) are all wrapped by the coating layer (3) to form a closed opening.

9. The internal slot motor with a stator structure according to claim 6, characterized in that: The cross section of the groove inner wall (22) is a fan-shaped structure.

10. The internal slot motor with a stator structure according to claim 6, characterized in that: The width of the notch (21) is 0.3-0.6 mm.

Images