Stator slot insulation structure and plug-in concentrated coil motor

Abstract

The utility model belongs to the technical field of motors, and discloses a stator slot insulation structure and a plug-in concentrated coil motor. The stator slot insulation structure is arranged in a stator slot of a stator core and comprises a first component and a second component, the first component is in an annular column shape, a first opening is formed in the side wall of the first component, the first component can be inserted into the stator slot in the opening direction of the stator slot, and the first opening corresponds to a slot opening of the stator slot; the second component is inserted into the first component and can divide the internal space of the first component into two cavities, and each cavity corresponds to one side of a stator slot; the second component is of an I-shaped structure, the I-shaped structure comprises a long I-shaped edge and a short I-shaped edge which are oppositely arranged, the long I-shaped edge is arranged close to the first opening, and the short I-shaped edge is arranged away from the first opening. The problem of insulativity caused by mutual contact of copper wires of adjacent phases and mutual contact of the copper wires and iron core tooth parts in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric motors, in particular to a stator slot insulation structure and an inserted concentrated winding electric motor. Background Art

[0002] In recent years, with the demand for higher efficiency, electric motors, as a traditional industry, have become increasingly demanded to have higher speeds and higher powers under the market cost competition. If you want to increase the speed and power of the motor, you need to make the diameter of the copper wire inside the coil thicker and increase the number of windings. The coil is made of copper wire bundles. If you use an inserted concentrated winding motor, you can deal with the above problems. This is because the inserted concentrated winding motor can wind multiple strands of copper wire in parallel. However, compared with the single copper wire winding method of the traditional concentrated winding motor, the conductor occupancy rate of the inserted concentrated winding motor will be much greater than that of the traditional concentrated winding motor after winding multiple strands of copper wire in parallel.

[0003] At this time, when the insulation structure of the traditional concentrated winding motor is applied to the plug-in concentrated winding motor, many shortcomings appear, such as:

[0004] 1. It is impossible to effectively divide an independent coil space in a single stator slot, so the coil insulation isolation cannot be achieved;

[0005] 2. The insulation structure has no support and is seriously offset to the left and right;

[0006] 3. The inner diameter side insulation structure is easily damaged by the tip of the teeth of the stator core of the motor during insertion, resulting in electrical failure.

[0007] Therefore, a new type of insulation structure is urgently needed to solve the above problems of plug-in concentrated winding motors. Utility Model Content

[0008] The utility model aims to provide a stator slot insulation structure and an inserted concentrated winding motor, which can effectively divide an isolated winding space, improve the insulation effect and enhance the installation stability.

[0009] To achieve this purpose, the utility model adopts the following technical solutions:

[0010] The utility model provides a stator slot insulation structure, which is arranged in a stator slot of a stator core, and the stator slot insulation structure comprises:

[0011] a first member, the first member is annular and has a first opening on its side wall, the first member can be inserted into the stator slot along the direction in which the stator slot is opened, and the first opening corresponds to the notch of the stator slot; and

[0012] a second component, the second component being inserted into the first component and capable of dividing the inner space of the first component into two chambers, each of the chambers corresponding to one side of the stator slot;

[0013] The second member is in an I-shaped structure, and the I-shaped structure includes a long I-shaped side and a short I-shaped side that are arranged opposite to each other, the long I-shaped side is arranged close to the first opening, and the short I-shaped side is arranged away from the first opening.

[0014] Preferably, the cross section of the first component is substantially quadrilateral, the first opening is arranged in the middle of one side, and the width of the first opening is smaller than the slot opening of the stator slot.

[0015] Preferably, the second component further comprises an I-shaped portion, and the long I-shaped side and the short I-shaped side are respectively connected to two ends of the I-shaped portion.

[0016] Preferably, the long I-shaped side includes two first stop ears symmetrically arranged on both sides of the I-shaped portion, and the short I-shaped side includes two second stop ears symmetrically arranged on both sides of the I-shaped portion.

[0017] Preferably, the second member is formed by folding a rectangular insulating film.

[0018] Preferably, the stator slot insulation structure further includes a third component, wherein the third component is inserted between the first component and the second component.

[0019] Preferably, the third component is located between the long I-shaped edge and the first opening, and can block the first opening.

[0020] Preferably, two sides of the third component are symmetrically bent to form arc-shaped ears, and each of the arc-shaped ears extends into one of the cavities and wraps one side of the long I-shaped edge.

[0021] An inserted concentrated winding motor comprises a stator core and copper wires. The stator core is provided with stator slots, the stator slots are provided with the above-mentioned stator slot insulation structure, and the copper wires are respectively placed in each of the cavities.

[0022] Beneficial effects: The stator slot insulation structure of the utility model is provided with a first member in the shape of an annular column in the stator slot of the stator core, so that the copper wire in the coil is separated and insulated from the stator core around which it is wound. The space in the first member is divided into two groups of chambers by a second member in the shape of an I-shaped structure, and copper wire is arranged in each chamber. Since the second member is in the shape of an I-shaped structure, compared with the V-shaped or U-shaped members commonly seen in traditional centralized winding motors, the short I-shaped side of the second member of the utility model located on the outer diameter side of the stator can effectively prevent the two-phase copper wires in the slot from contacting each other, thereby ensuring insulation; at the same time, since the second member is in the shape of an I-shaped structure, the circuitous overlapping bending structure of the long I-shaped side and the short I-shaped side increases the strength of the second member, thereby preventing the second member from bending, deforming or position shifting during the shaping process. Finally, by arranging the long I-shaped side of the second member close to the first opening and the short I-shaped side away from the first opening, the long I-shaped side can well block the first opening.

[0023] The utility model also includes a third component, which is inserted between the long I-shaped side of the second component and the first opening, so that the insulation layer on the inner diameter side of the stator has four layers, has strong crack resistance, and further ensures insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded view of the stator slot insulation structure provided by the utility model;

[0025] Figure 2 yes Figure 1 a principal diagram of the first component in;

[0026] Figure 3 yes Figure 1 a principal diagram of a second component in;

[0027] Figure 4 yes Figure 1 The main diagram of the third component in FIG.

[0028] Figure 5 yes Figure 1 A top view of a stator slot insulation structure;

[0029] Figure 6 It is a partial top view of the stator core provided by the utility model.

[0030] In the figure: 1, first component; 11, first opening; 2, second component; 21, long I-shaped side; 211-first stop ear; 22, short I-shaped side; 221-second stop ear; 23, I-shaped portion; 3, third component; 31, ear portion; 4, stator core; 41, stator slot; 5, copper wire; 6, chamber. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] like Figures 1 to 5 As shown, the utility model provides a stator slot insulation structure, which is arranged in the stator slot 41 of the stator core 4.

[0036] The stator slot insulation structure includes a first component 1 and a second component 2 . The second component 2 is inserted into the first component 1 and can separate the inner space of the first component 1 into two chambers 6 . Each chamber 6 corresponds to one side of the stator slot 41 .

[0037] like Figure 2As shown, the first component 1 is annular and has a first opening 11 on its side wall. The first component 1 can be inserted into the stator slot 41 along the opening direction of the stator slot 41 , and the first opening 11 corresponds to the notch of the stator slot 41 .

[0038] When all the copper wires 5 on the stator core 4 are wound, the second component 2 is inserted between the copper wires 5 of two adjacent groups of stator cores 4. Since the stator is annular, a specific annular clamp can be used during installation. The second component 2 is connected to the annular clamp to form the center of the circle, so that each second component 2 can be inserted into the stator slot 41. The second component 2 can avoid contact between the copper wires 5 on adjacent stator cores 4, thereby improving the insulation of the copper wires 5 on the rotating motor.

[0039] The cross section of the first component 1 is roughly quadrilateral, and the first opening 11 of the first component 1 is smaller than the slot width of the stator slot 41, so that the internal copper wire 5 can be enclosed to provide better insulation and prevent the copper wire 5 from overflowing and contacting the rotor.

[0040] like Figure 3 As shown, the second component 2 is in an I-shaped structure, which includes a long I-shaped side 21 and a short I-shaped side 22 that are arranged opposite to each other. The long I-shaped side 21 is arranged close to the first opening 11, and the short I-shaped side 22 is arranged away from the first opening 11.

[0041] like Figure 3 As shown, the second component 2 also includes an I-shaped portion 23, a long I-shaped side 21 and a short I-shaped side 22. The long I-shaped side 21 and the short I-shaped side 22 are respectively connected to the two ends of the I-shaped portion 23, wherein the short I-shaped side 22 can ensure the phase-to-phase insulation on the outer diameter side of the stator. At the same time, since the long I-shaped side 21 and the short I-shaped side 22 form an I-shaped structure with the I-shaped portion 23, such a structure can increase the strength of the second component 2 itself, so that it will not be easily squeezed and deflected by the copper wire 5, and the long I-shaped side 21 can prevent the copper wire 5 from overflowing and avoid the copper wire 5 from contacting the rotor.

[0042] The long I-shaped edge 21 can close the first opening 11 , enclose and wrap the copper wire 5 in the stator slot 41 , prevent the copper wire 5 from being exposed and contacting the rotor, and improve insulation.

[0043] The edge of the stator core 4 close to the center is relatively sharp. The first component 1, the second component 2 and the third component 3 are provided to provide four layers of protection for the copper wire 5 to prevent the stator slot insulation structure from being easily cut and reduce the probability of direct contact between the copper wire 5 and the stator core 4.

[0044] Specifically, the long I-shaped side 21 includes two first stop ears 211 symmetrically arranged on both sides of the I-shaped portion 23, and the first stop ears 211 are formed by two bends, so the long I-shaped side 21 of the second member provides two layers of protection for the copper wire 5, and the short I-shaped side 22 includes two second stop ears 221 arranged on both sides of the I-shaped portion 23. The combined width of the two groups of first stop ears 211 is greater than the spacing of the first opening 11. The larger the area covered by the long I-shaped side 21, the more areas of the copper wire 5 will be protected, reducing the probability of the copper wire 5 overflowing and the contact between the rotor and the copper wire 5, and improving the insulation.

[0045] In particular, the second component 2 of the utility model is formed by folding a rectangular insulating film and then by hot pressing, wherein the second stop ears 221 set on the short I-shaped edge 22 are the two ends of the rectangular insulating film, and the position of the first stop ear 211 is the middle position of the rectangular insulating film. The second component 2 is formed by folding a single rectangular insulating film, and has a stronger integrity.

[0046] The second stopper ear 221 is provided to prevent the copper wire 5 from squeezing the second component 2 and entering another chamber 6 of the same stator slot 41 , thereby reducing the probability of contact between the copper wires 5 on adjacent stator cores 4 and improving insulation.

[0047] like Figure 1 As shown, the utility model also includes a third component 3, which is inserted between the first component 1 and the second component 2 to further provide protection for the internal copper wire 5, while preventing the first component 1 and the second component 2 from being cut by the stator core 4, so that the internal copper wire 5 can obtain better insulation.

[0048] like Figure 4 As shown, the third component 3 is located between the long I-shaped side 21 and the first opening 11, and can block the first opening 11 to provide better insulation for the copper wire 5, preventing the copper wire 5 from overflowing and contacting the rotor. The two sides of the third component 3 are symmetrically bent to form arc-shaped ears 31, and each arc-shaped ear 31 extends into a side chamber 6 and wraps one side of the long I-shaped side 21. The arc-shaped ear 31 is also fitted with the inner wall of the first component 1 to achieve four-layer protection for the copper wire 5, prevent the copper wire 5 from being cut, and improve the strength of the stator slot insulation structure. The four-layer protection is not easily cut by the edge of the stator core 4, preventing the copper wire 5 from directly contacting the stator core 4, and can improve the insulation capacity.

[0049] The first component 1, the second component 2 and the third component 3 of the utility model are insulating films and have the same length. At the same time, the long I-shaped edge 21 and the short I-shaped edge 22 on the first component 1 can be formed by hot pressing or bonded by an adhesive, which can reduce costs and improve insulation performance.

[0050] like Figure 6As shown, the utility model also provides an inserted concentrated winding motor, including a stator core 4 and a copper wire 5, stator slots 41 are opened between the stator cores 4, a stator slot insulation structure is arranged in the stator slots 41, the copper wire 5 is wound around the stator core 4, and the copper wire 5 is passed through the corresponding chamber 6.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A stator slot insulation structure, arranged in a stator slot (41) of a stator core (4), characterized in that: The stator slot insulation structure comprises: A first component (1), the first component (1) is in an annular column shape and has a first opening (11) on its side wall, the first component (1) can be inserted into the stator slot (41) along the opening direction of the stator slot (41), and the first opening (11) corresponds to the notch of the stator slot (41); and a second component (2), the second component (2) being inserted into the first component (1) and capable of dividing the internal space of the first component (1) into two chambers (6), each of the chambers (6) corresponding to one side of the stator slot (41); The second member (2) is in an I-shaped structure, the I-shaped structure comprising a long I-shaped side (21) and a short I-shaped side (22) arranged opposite to each other, the long I-shaped side (21) being arranged close to the first opening (11), and the short I-shaped side (22) being arranged away from the first opening (11).

2. The stator slot insulation structure according to claim 1, characterized in that: The cross section of the first component (1) is substantially quadrilateral, and the width of the first opening (11) is smaller than the slot opening of the stator slot (41).

3. The stator slot insulation structure according to claim 1, characterized in that: The second component (2) further comprises an I-shaped portion (23), and the long I-shaped side (21) and the short I-shaped side (22) are respectively connected to two ends of the I-shaped portion (23).

4. The stator slot insulation structure according to claim 3, characterized in that: The long I-shaped side (21) comprises two first stop ears (211) symmetrically arranged on both sides of the I-shaped portion (23), and the short I-shaped side (22) comprises two second stop ears (221) arranged on both sides of the I-shaped portion (23).

5. The stator slot insulation structure according to claim 3 or 4, characterized in that: The second member (2) is formed by folding a rectangular insulating film.

6. The stator slot insulation structure according to claim 1, characterized in that: The stator slot insulation structure also includes a third component (3), wherein the third component (3) is inserted between the first component (1) and the second component (2).

7. The stator slot insulation structure according to claim 6, characterized in that: The third component (3) is located between the long I-shaped edge (21) and the first opening (11), and is capable of blocking the first opening (11).

8. The stator slot insulation structure according to claim 7, characterized in that: Both sides of the third component (3) are symmetrically bent to form arc-shaped ears (31), and each arc-shaped ear (31) extends into a corresponding cavity (6) and wraps around one side of the long I-shaped edge (21).

9. An insertion type concentrated winding motor, comprising a stator core (4) and copper wires (5), wherein the stator core (4) is provided with stator slots (41), characterized in that: The stator slot insulation structure according to any one of claims 1 to 8 is arranged in the stator slot (41), and the copper wire (5) is placed in each of the chambers (6) respectively.

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