A phase-to-phase insulation structure for a concentrated winding motor and a motor thereof

Abstract

The utility model discloses a kind of phase-to-phase insulation structure of concentrated winding motor and its motor, comprising: several insulation main parts, the insulation main part is between adjacent winding;The insulation main part includes symmetrically arranged first insulation part and second insulation part;First fixed part is provided on the side of the first insulation part, and second fixed part is provided on the side of the second insulation part;When the insulation main part is configured in the stator slot formed between adjacent winding, the first fixed part and the second fixed part are respectively inserted between winding resistance and stator tooth slot bottom portion. Through the above design, the utility model can realize efficient insulation between adjacent winding, to avoid causing short circuit, electric leakage and other safety problems.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a phase-to-phase insulation structure for a concentrated winding motor and the motor thereof. Background Technology

[0002] In the field of motor technology, concentrated winding motors are widely used in various electrical equipment due to their compact structure and high efficiency. These motors typically employ a design where the windings are directly wound around the stator teeth. However, this structure also presents challenges to the reliability of insulation between the windings. Because the windings of different phases are tightly arranged in a limited space, direct contact between the windings can easily lead to insulation failure, thereby causing safety hazards such as short circuits and leakage.

[0003] The traditional solution is to insert insulating components (such as insulating paper or plastic spacers) between the windings to achieve phase-to-phase insulation. However, the existing technology has the following significant drawbacks: (1) Traditional insulating components are simply inserted into the winding gaps without an effective fixing structure. During motor operation, they are prone to axial / radial displacement due to vibration or thermal deformation, or even complete detachment, leading to insulation failure. (2) The insulating components need to be manually inserted into the narrow winding gaps. The original operating space is very limited, and the insulating components are easily obstructed by winding entanglement, making it difficult to insert them smoothly between adjacent windings, resulting in low operating efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an interphase insulation structure for a concentrated winding motor that can improve the efficiency and smoothness of inserting the insulation structure between adjacent windings while ensuring the reliability of insulation between windings.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An interphase insulation structure for a concentrated winding stator includes: a plurality of insulating main bodies, wherein the insulating main bodies are located between adjacent windings;

[0007] The insulating main body includes a first insulating part and a second insulating part arranged symmetrically.

[0008] A first fixing part is provided on the side of the first insulating part, and a second fixing part is provided on the side of the second insulating part;

[0009] When the insulating main body is disposed in the stator slot formed between adjacent windings, the first fixing part and the second fixing part are respectively inserted between the winding and the inner wall of the stator core.

[0010] Preferably, the insulating main body is inserted into the stator slot from the reverse lead side of the stator core, and the first end of the insulating main body is a guide end, which is provided with a guide structure.

[0011] Preferably, the guide structure includes a first oblique cut portion disposed on the first end of the first insulating portion and the second insulating portion;

[0012] A second oblique cut portion is provided on the first end of the first fixing part and the second fixing part.

[0013] Preferably, the first oblique cut portion and the second oblique cut portion have the same oblique angle.

[0014] Preferably, the insulating main body is obtained by means of a sheet-like insulating main body sheet;

[0015] The insulating main sheet includes a first insulating region and a second insulating region, which are divided by the central symmetry line of the insulating main sheet.

[0016] The first insulating region includes a first fixing region defined by a second bend line;

[0017] The second insulating region includes a second fixing region defined by a third bend line;

[0018] The first fixing region is the same as the second fixing region.

[0019] Preferably, the first insulating region and the second insulating region are bent along the central symmetry line as the first bending line to obtain the corresponding first insulating region and second insulating region.

[0020] Preferably, the first insulating portion is bent along the second bending line to obtain the corresponding first fixing portion;

[0021] The second insulating portion is bent along the third bending line to obtain the corresponding second fixing portion.

[0022] Preferably, the insulating main sheet is obtained by cutting along a cutting path on a sheet-like insulating roll, and two insulating main sheets with corresponding upper and lower concave and convex shapes are cut along the cutting path on the same insulating roll.

[0023] Preferably, the insulating material used for the insulating body sheet is an insulating film with a thickness of 0.1~0.25mm.

[0024] An electric motor includes a stator core with lead wire side and reverse lead wire side at both ends. Stator slots for winding are provided on the inner side of the stator core. The phase-to-phase insulation structure described in this invention is inserted between adjacent windings to achieve phase-to-phase insulation.

[0025] The beneficial effects of this utility model are:

[0026] (1) This utility model discloses a phase-to-phase insulation structure for a concentrated winding stator. The design is ingenious and the structure is simple. The insulation structure includes several insulating main parts, which are located between adjacent windings. The insulating main parts include a first insulating part and a second insulating part arranged symmetrically. A first fixing part is provided on the side of the first insulating part, and a second fixing part is provided on the side of the second insulating part. When the insulating main parts are arranged in the stator slots formed between adjacent windings, the first fixing part and the second fixing part are respectively inserted between the winding and the inner wall of the stator core. At the same time, the insulation structure is obtained by bending the insulating main body sheet. The bending line allows the insulation structure to shrink and stretch in the stator slot to better fit the circumferential inner wall of the stator and the bottom of the stator tooth slot. Under the action of bending, the insulation structure is stably fixed in the stator slot. The above design solves the problem that the phase-to-phase insulation may shift or even fall off in the axial or radial direction of the motor due to vibration during the motor manufacturing process or during the motor operation, resulting in poor insulation.

[0027] (2) This utility model discloses a phase-to-phase insulation structure for a concentrated winding stator. By designing a guide structure at the guide end, including a first oblique cut on the first insulation part and the second insulation part, and a second oblique cut on the first fixing part and the second fixing part, the insulation structure can be inserted more smoothly and quickly between adjacent windings, reducing the obstruction of the winding to the insulation body part during insertion and improving operating efficiency. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of the phase-to-phase insulation structure of a concentrated winding stator according to this utility model;

[0029] Figure 2 This is another schematic diagram of the phase-to-phase insulation structure shown in this utility model;

[0030] Figure 3 This is a schematic diagram of the insulation structure installed between adjacent windings.

[0031] Figure 4 This is a schematic diagram showing the state of the insulation structure in the stator;

[0032] Figure 5 This is a schematic diagram of the structure of the insulating main sheet used to obtain the insulating structure in this utility model;

[0033] Figure 6 This is a schematic diagram of the insulating sheet being cut along the cutting path on a strip of insulating roll;

[0034] The components in the attached diagram are labeled as follows:

[0035] 1. Insulating main body; 1-1. First insulating part; 1-2. Second insulating part; 2. First fixing part; 3. Second fixing part; 4. Guide end; 4-1. First oblique cut part; 4-2. Second oblique cut part; 5. Insulating main body sheet; 6. Cutting path; 7. First bending line; 8. Second bending line; 9. Third bending line; 10. First insulating part area; 11. Second insulating part area; 12. First fixing part area; 13. Second fixing part area; 14. Stator core; 15. Winding. Detailed Implementation

[0036] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0037] Example:

[0038] This embodiment describes a phase-to-phase insulation structure for a concentrated winding motor.

[0039] like Figure 1 As shown, Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of the phase-to-phase insulation structure of a concentrated winding stator according to this utility model. The phase-to-phase insulation structure of a concentrated winding stator includes: a plurality of insulating main bodies 1, wherein the insulating main bodies 1 are located between adjacent windings 15;

[0040] The insulating main body 1 includes a first insulating part 1-1 and a second insulating part 1-2 arranged symmetrically;

[0041] A first fixing part 2 is provided on the side of the first insulating part 1-1, and a second fixing part 3 is provided on the side of the second insulating part 1-2;

[0042] When the insulating main body 1 is disposed in the stator slot formed between adjacent windings, the first fixing part 2 and the second fixing part 3 are respectively inserted between the windings wound on the stator teeth and the bottom of the stator tooth slot.

[0043] This utility model designs an insulation structure for use between adjacent windings of the stator core of an electric motor. It can solve the problem of poor insulation caused by phase-to-phase insulation shifting or even falling off in the axial or radial direction of the motor due to vibration or other reasons during motor manufacturing or operation.

[0044] In a preferred embodiment, to improve the stability of the insulation structure when used between windings and to improve the shape of the phase-to-phase insulation installation, the insulation body 1 is designed in a V-shape. During installation, windings are completed on multiple stator slots within the stator core, forming stator slots between adjacent windings. The phase-to-phase insulation structure is inserted into the stator slots. At this time, the first and second insulation parts protrude towards the inner diameter of the stator core. The first and second fixing parts slowly enter along the inner wall of the stator core, the side wall of the stator slots, and below the windings wound on the stator teeth, respectively. The V-shaped insulation body is close to the inner side wall of the stator core and the bottom of the stator slots. After entering the stator slots, the first and second fixing parts abut against the bottom of the stator slots, forming a stable clamping and fixing structure between adjacent stator slots and providing a stable insulation function.

[0045] In a preferred embodiment, the insulating main body 1 is inserted into the stator slot from the reverse lead side of the stator core 14. The first end of the insulating main body 1 is the guide end 4, and the end away from the guide end is the second end of the insulating main body. The guide end 4 is provided with a guide structure to assist the insulating main body in smoothly entering the stator slot. Specifically, as shown... Figure 1 , 2 As shown, Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the phase-to-phase insulation structure of a concentrated winding stator according to this utility model. Figure 2 This is a schematic diagram of the phase-to-phase insulation structure shown in this utility model from another angle. In this embodiment, the guide structure includes a first oblique cut portion 4-1 disposed on the first end of the first insulation portion 1-1 and the second insulation portion 1-2;

[0046] The second oblique cut portion 4-2 is provided on the first end of the first fixing portion 2 and the second fixing portion 3.

[0047] By providing a first and a second beveled portion on the insulating body, it can be more easily inserted between the bottom of the stator slot and the winding, reducing the obstruction of the winding to the insulating body during installation. Furthermore, the beveled angle is particularly important when using automated equipment for mechanized insertion of the insulating structure between the windings, improving the smoothness and efficiency of the operation. This invention does not protect compatible automated equipment, therefore further details are omitted.

[0048] By designing the beveled section, the phase-to-phase insulation structure can be more easily inserted between different adjacent windings, thereby improving operability.

[0049] Among them, the first oblique cut 4-1 and the second oblique cut 4-2 have the same oblique cutting angle, and the resulting oblique cutting angle is the same, which makes the production more standardized.

[0050] This invention presents an insulation structure for insulating adjacent windings. The structure is simple, has low production cost, and is highly applicable. Through the ingenious design of the above structure, the insulation structure can be inserted manually or is more suitable for automated mechanical operation, thereby improving production efficiency.

[0051] This utility model describes a method for obtaining the insulation structure. The method described in this utility model is only one preferred embodiment, but is not limited to this method. In this utility model, the insulation main body 1 is obtained by a sheet-like insulation main body sheet 5. In a preferred embodiment, before installing the insulation structure into the stator slot between adjacent windings, the insulation main body sheet is bent to obtain the desired structure. Figure 1 The phase-to-phase insulation structure is shown. For example... Figure 5 , 6 As shown, Figure 5 This is a schematic diagram of the insulating main sheet used to obtain the insulating structure in this utility model. Figure 6 This is a schematic diagram showing the insulating sheet being cut along a cutting path on a strip of insulating material. The insulating sheet 5 includes a first insulating region 10 and a second insulating region 11, divided by a central symmetry line of the insulating sheet 5.

[0052] The first insulating region 10 includes a first fixing region 12 divided by the second bending line 8;

[0053] The second insulating region 11 includes a second fixing region 13 divided by the third bending line 9;

[0054] The first fixing region 12 is the same as the second fixing region 13.

[0055] The first insulating region 10 and the second insulating region 11 are bent along the first bending line 7 with the central symmetry line as the first bending line 7. In this embodiment, with the stator core as a reference, the first insulating region 10 and the second insulating region 11 are bent along the first bending line 7, protruding away from the inner wall of the stator core and along the inner diameter direction of the stator core, thus obtaining the corresponding first insulating region 1-1 and second insulating region 1-2.

[0056] The first insulating portion 10 is bent along the second bending line 8 to obtain the corresponding first fixing portion 2. In this embodiment, when the insulating main body is inserted into the stator slot, the first fixing portion extends circumferentially along the stator core. At this time, the second bending line 8 is concave in the opposite direction to the first bending line 7.

[0057] Similarly, the second insulating region 11 is bent along the third bending line 9 to obtain the corresponding second fixing part 3. At this time, the bending direction of the third bending line 9 is the same as that of the second bending line 8, and a concave bend is formed.

[0058] The bending line helps different areas to bend and change to form corresponding insulation structures. When the insulation structure is inserted between adjacent windings from the reverse lead side of the stator, the inclined chamfer of the guide end helps the insulation structure to enter smoothly and avoids being blocked by the winding wrapped around the teeth, so that it can be smoothly inserted into the stator slot. The bendable insulation structure can also shrink and extend when entering the stator slot due to the presence of the bending line, so as to better fit the inner wall of the stator circumferentially and one side of the stator teeth, achieving efficient insulation of the winding.

[0059] The insulating material used in the aforementioned insulating body sheet is an insulating film material with a thickness of 0.1~0.25mm. Insulating materials include: PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PPS (polyphenylene sulfide), Nomex, etc., as well as films composed of these materials. Furthermore, in addition to the materials mentioned above, any material suitable for use as motor insulation can be used.

[0060] Furthermore, the cutting of the insulating main body sheet is completed on automated equipment. It is worth mentioning that, in order to achieve efficient utilization of the insulating material during the cutting process, a cutting path was designed when cutting the insulating main body sheet of this invention, such as... Figure 6 As shown, Figure 6 This is a schematic diagram showing the cutting of the insulating main sheet 5 along a cutting path on a strip of insulating roll. The insulating main sheet 5 is obtained by cutting along a cutting path 6 on a sheet of insulating roll. Cutting two corresponding insulating main sheets with concave and convex shapes from the same single strip of insulating roll along the cutting path 6 improves material utilization, reduces cutting waste, and prevents cutting waste from adhering to the motor or mixing into the compressor as impurities (contamination).

[0061] As described above, the production method of this insulating structure is not complicated. The obtained insulating body sheet is bent to obtain the insulating main body. When inserted between adjacent windings, it can be more adapted to the stator winding under the action of the bending line. Moreover, it can achieve self-clamping between the windings as the bending structure changes, forming a stable fixation. During the operation of the motor, it will not have axial / radial displacement due to vibration or thermal deformation, so as to fall off and cause insulation failure.

[0062] In this invention, the above-mentioned insulation structure is applied to an electric motor. The electric motor includes a stator core 14, with lead wire side and reverse lead wire side provided at both ends of the stator core 14. Stator slots for winding the winding are provided on the inner side of the stator core 14. The phase-to-phase insulation structure of this invention is inserted between adjacent windings after winding to achieve phase-to-phase winding insulation.

[0063] Specifically, when the stator core 14 is viewed from the axial direction, the first insulating part 1-1 of the V-shaped insulating main body 1 is bent toward the bottom of the stator tooth groove by the first bending line 7, and then bent in the circumferential direction opposite to the V-shaped opening side by the second bending line 8 to form the first fixing part 2, which is clamped and fixed between the bottom of the stator tooth groove and the winding wound on the stator tooth groove.

[0064] Simultaneously, the second insulating portion 1-2 of the V-shaped insulating main body 1 is further bent circumferentially along the third bending line 9 in the opposite direction to the V-shaped opening side to form the second fixing portion 3. This second fixing portion 3 is then clamped and fixed between the bottom of the stator slot and the winding wound on the stator slot. This V-shaped insulating main body is fixed between the bottom of the adjacent stator slot and the winding, relying on the inner wall of the stator core. Therefore, the phase-to-phase insulating main body structure will not misalign or detach, reliably achieving insulation between the windings. This has brought significant production benefits in actual production. Furthermore, the insertion of this insulating structure between adjacent windings and the cutting of the insulating main body sheet are automated in actual production, greatly improving production efficiency and product quality.

[0065] As shown in the above embodiments, this utility model ensures the reliability of insulation between windings while improving the operational efficiency and smoothness of the insulation structure when inserting into adjacent windings. Furthermore, under the action of this insulation structure, the insulation effect and stability between windings are improved.

[0066] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A phase-to-phase insulation structure for a concentrated winding motor, characterized in that, include: A plurality of insulating main body portions (1) are located between adjacent windings; The insulating main body (1) includes a first insulating part (1-1) and a second insulating part (1-2) arranged symmetrically. A first fixing part (2) is provided on the side of the first insulating part (1-1), and a second fixing part (3) is provided on the side of the second insulating part (1-2). When the insulating main body (1) is disposed in the stator slot formed between adjacent windings, the first fixing part (2) and the second fixing part (3) are respectively inserted between the winding on the stator tooth and the bottom of the stator tooth slot.

2. The phase-to-phase insulation structure of a concentrated winding motor according to claim 1, characterized in that, The insulating main body (1) is inserted into the stator slot from the reverse lead side of the stator core (14). The first end of the insulating main body (1) is a guide end (4), and the guide end (4) is provided with a guide structure.

3. The phase-to-phase insulation structure of a concentrated winding motor according to claim 2, characterized in that, The guide structure includes a first oblique cut (4-1) disposed on the first end of the first insulating part (1-1) and the second insulating part (1-2). A second oblique cut (4-2) is provided on the first end of the first fixing part (2) and the second fixing part (3).

4. The phase-to-phase insulation structure of a concentrated winding motor according to claim 3, characterized in that, The first oblique cut (4-1) and the second oblique cut (4-2) have the same oblique angle.

5. The phase-to-phase insulation structure of a concentrated winding motor according to claim 1, characterized in that, The insulating main body (1) is obtained by means of a sheet-like insulating main body sheet (5); The insulating main sheet (5) includes a first insulating region (10) and a second insulating region (11) divided by the central symmetry line of the insulating main sheet (5). The first insulating region (10) includes a first fixing region (12) divided by a second bend line (8); The second insulating region (11) includes a second fixing region (13) divided by a third bend line (9); The first fixing region (12) is the same as the second fixing region (13).

6. The phase-to-phase insulation structure of a concentrated winding motor according to claim 5, characterized in that, The first insulating region (10) and the second insulating region (11) are bent along the first bending line (7) with the central symmetry line as the first bending line (7) to obtain the corresponding first insulating part (1-1) and second insulating part (1-2).

7. The phase-to-phase insulation structure of a concentrated winding motor according to claim 6, characterized in that, The first insulating part region (10) is bent along the second bending line (8) to obtain the corresponding first fixing part (2); The second insulating region (11) is bent along the third bending line (9) to obtain the corresponding second fixing part (3).

8. The phase-to-phase insulation structure of a concentrated winding motor according to claim 5, characterized in that, The insulating main sheet (5) is obtained by cutting along the cutting path (6) on the sheet-shaped insulating roll. Two insulating main sheets (5) with corresponding upper and lower concave and convex shapes are cut along the cutting path (6) on the same insulating roll.

9. The phase-to-phase insulation structure of a concentrated winding motor according to claim 8, characterized in that, The insulating material used in the insulating main sheet (5) is an insulating film with a thickness of 0.1~0.25mm.

10. An electric motor, characterized in that, It includes a stator core (14), with lead wire side and reverse lead wire side provided at both ends of the stator core (14), and stator tooth groove for winding the winding provided on the inner side of the stator core (14), and the phase-to-phase insulation structure described in any one of claims 1-9 is used for inter-winding between adjacent windings after winding.

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