Winding structure

Abstract

The utility model relates to the technical field of motor windings, in particular to a winding structure, which comprises a structure body, the structure body comprises a plurality of coil layers which are clamped on the inner side wall of an iron core from outside to inside, the outer coil layer of every two adjacent coil layers wraps the inner coil layer, and the outer coil layer of every two adjacent coil layers wraps the inner coil layer. The heights of the multiple coil layers are sequentially increased from outside to inside, each coil layer comprises three groups of phase line coils which are arranged in the circumferential direction at equal angles, the phase line coils are located in the same end face space, the three groups of phase line coils are connected in a non-contact mode, each group of phase line coils comprises two symmetrically-arranged formed coils, and the phase line coils are arranged in the same end face space. The formed coil is of a symmetrical structure; and the formed coil comprises an upper arc-shaped connecting section, a left vertical connecting section, a lower arc-shaped connecting section and a right vertical connecting section, and the direct-winding coil adopts the design of the direct winding with the highest performance, so that the performance of a product is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor windings, in particular to a winding structure. Background Art

[0002] The hollow cup windings currently available on the market are generally oblique or polygonal.

[0003] For example, on May 3, 2022, a patent with publication number CN111313586B was disclosed, and its name is a coil group, concentrated winding and axial flux motor. The coil group includes at least two coils, which are stacked in sequence and connected in series with each other; wherein the coils are all planar spirals wound by metal sheets; wherein the spiral directions of two adjacent coils are opposite. The invention uses long strips of metal sheets as the main body to wind the concentrated windings of the axial flux motor, which can effectively increase the slot fill rate and the space utilization rate of the winding end; however, in the above literature, the windings used are mostly oblique windings, and there are fewer straight windings, which reduces the performance of the product. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a winding structure to solve the problem of poor product performance.

[0005] Based on the above purpose, the utility model provides a winding structure, including a structural body, the structural body includes a plurality of coil layers from the outside to the inside that are clamped on the inner wall of the iron core, the outer coil layer of the two adjacent coil layers wraps the inner coil layer, and the heights of the plurality of coil layers from the outside to the inside are arranged in sequence, each coil layer includes three groups of phase coils arranged at equal angles along the circumferential direction, the phase coils are located in the same end face space, the three groups of phase coils are not connected to each other, and each group of phase coils includes two symmetrically arranged formed coils; the formed coils include an upper arc-shaped connecting section, a left vertical connecting section, a lower arc-shaped connecting section and a right vertical connecting section, the upper arc-shaped connecting section and the lower arc-shaped connecting section have the same structure, the left vertical connecting section and the right vertical connecting section have the same structure, the upper arc-shaped connecting section is located directly above the lower arc-shaped connecting section, and the two ends of the inner side wall of the upper arc-shaped connecting section are respectively connected to the lower arc-shaped connecting section through the left vertical connecting section and the right vertical connecting section.

[0006] Optionally, the formed coil is a self-adhesive enameled wire.

[0007] Optionally, the formed coil includes a conductor and a self-adhesive paint layer wrapped on the surface of the conductor, and the conductor is a flat copper wire.

[0008] Optionally, the surface of the iron core is coated with insulating material or pasted with insulating paper.

[0009] Optionally, the upper arc-shaped connecting section in each coil layer is the same size, the left vertical connecting section in each coil layer has the same cross-sectional size, the left vertical connecting section in the multiple coil layers increases in height from the outside to the inside, and the height of the left vertical connecting section of the outer coil layer in two adjacent coil layers is not less than the sum of the height of the left vertical connecting section of the inner coil layer and twice the height of the upper arc-shaped connecting section of the outer coil layer.

[0010] Optionally, the coil layer has four layers.

[0011] Optionally, the cross-sections of the left vertical connection segment and the right vertical connection segment are both arranged in an annular arc shape, and all the left vertical connection segments and all the right vertical connection segments of the four coil layers form an annular arrangement.

[0012] The formed coil has a symmetrical structure.

[0013] Beneficial effects of the utility model: The utility model provides a winding structure, which adopts the highest performance straight winding design. Under the same number of turns and filling rate, the back electromotive force can be increased by 20% to 50%, which greatly improves the performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the formed coil of the utility model;

[0017] Figure 3 It is a schematic diagram of the top view of the formed coil of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the utility model in which a coil layer is arranged on the iron core;

[0019] Figure 5 It is a schematic diagram of the structure of the utility model in which two coil layers are arranged on the iron core;

[0020] Figure 6 It is a schematic diagram of the structure of the utility model in which three coil layers are arranged on the iron core;

[0021] Figure 7It is a schematic diagram of the structure of the utility model in which four coil layers are arranged on the iron core.

[0022] In the figure: 1, iron core; 2, structural body; 3, formed coil; 31, upper arc-shaped connecting section; 32, left vertical connecting section; 33, lower arc-shaped connecting section; 34, right vertical connecting section; 41, first layer of coil layer; 42, second layer of coil layer; 43, third layer of coil layer; 44, fourth layer of coil layer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 3 As shown, a winding structure includes a structural body 2, wherein the structural body 2 includes multiple coil layers from outside to inside and clamped on the inner side wall of the iron core 1, wherein the iron core 1 is an annular column, and the outer coil layer of the two adjacent coil layers wraps the inner coil layer, and the heights of the multiple coil layers from outside to inside are arranged in sequence, and each coil layer includes three groups of phase coils arranged at equal angles along the circumferential direction, and the phase coils are located in the same end face space. The three groups of phase coils are not connected to each other, and each group of phase coils includes two symmetrically arranged formed wires. The formed coil 3 is a symmetrical structure; the formed coil 3 includes an upper arc-shaped connecting section 31, a left vertical connecting section 32, a lower arc-shaped connecting section 33 and a right vertical connecting section 34, the upper arc-shaped connecting section 31 and the lower arc-shaped connecting section 33 have the same structure, the left vertical connecting section 32 and the right vertical connecting section 34 have the same structure, the upper arc-shaped connecting section 31 is located directly above the lower arc-shaped connecting section 33, and the two ends of the inner side wall of the upper arc-shaped connecting section 31 are connected to the lower arc-shaped connecting section 33 through the left vertical connecting section 32 and the right vertical connecting section 34 respectively.

[0026] This structure adopts the highest performance direct winding design, and the formed coil 3 is clipped onto the iron core 1 in a building block-like manner, so that the back electromotive force can be increased by 20%~50% under the same number of turns and filling rate, greatly improving the performance of the product.

[0027] In addition, the present structure manufactures each formed coil 3 separately and distributes them by phase to ensure the absolute resistance and inductance of the formed coil 3 of each phase, thereby achieving uniform amplitude of each opposite electromotive force; in addition, each phase line coil is distributed in multiple layers, each phase is spatially arranged at 120°, and increases layer by layer to ensure the absolute phase of the phase line coil, so that the opposite electromotive force phase is consistent.

[0028] The formed coil 3 is a self-adhesive enameled wire. As a special enameled wire, the self-adhesive enameled wire has a special processing property, which makes the coil easy to manufacture.

[0029] The formed coil 3 includes a conductor and a self-adhesive paint layer wrapped on the surface of the conductor. The conductor is a flat copper wire. Compared with round copper wire, the flat copper wires are in surface contact with each other after being stacked and wound, which can further eliminate gaps and improve the slot fill rate, thereby greatly improving the filling rate of the coil and achieving the performance of the Litz wire.

[0030] The surface of the iron core 1 is coated with insulating material or pasted with insulating paper to ensure that the formed coil 3 meets the insulation withstand voltage requirements after assembly.

[0031] The upper arc-shaped connecting section 31 in each coil layer is of the same size, and the cross-sectional size of the left vertical connecting section 32 in each coil layer is of the same size. The left vertical connecting section 32 in the multiple coil layers from the outside to the inside increases successively. The height of the left vertical connecting section 32 of the outer coil layer in the two adjacent coil layers is not less than the sum of the height of the left vertical connecting section 32 of the inner coil layer and twice the height of the upper arc-shaped connecting section 31 of the outer coil layer, so that the formed coils 3 in different coil layers are easily clipped onto the iron core 1.

[0032] The coil layer has four layers, and the cross-sections of the left vertical connecting section 32 and the right vertical connecting section 34 are both arranged in an arc shape. All the left vertical connecting sections 32 and the right vertical connecting sections 34 of the four coil layers are arranged in an annular shape, thereby improving the filling rate of the formed coil 3.

[0033] like Figure 4 As shown, a first coil layer 41 is arranged on the iron core 1 , so that one coil layer is arranged on the iron core 1 .

[0034] like Figure 5 As shown, a second coil layer 42 is provided on the core 1 which already has one coil layer. Figure 4On the basis of the second coil layer 42 , the iron core 1 is provided with two coil layers.

[0035] like Figure 6 As shown, a third coil layer 43 is provided on the core 1 which has already provided two coil layers. Figure 5 On the basis of the third coil layer 43 , three coil layers are arranged on the iron core 1 .

[0036] like Figure 7 As shown, a fourth coil layer 44 is provided on the core 1 which already has three coil layers. Figure 6 On the basis of the fourth coil layer 44 , four coil layers are arranged on the iron core 1 .

[0037] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0038] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A winding structure, comprising a structural body, characterized in that: The structural body includes multiple layers of coil layers from outside to inside that are clamped on the inner wall of the iron core, the outer coil layer of two adjacent coil layers wraps the inner coil layer, and the heights of the multiple layers of coil layers from outside to inside are arranged in sequence, each layer of the coil layer includes three groups of phase coils arranged at equal angles along the circumferential direction, the phase coils are located in the same end surface space, the three groups of phase coils are not connected to each other, and each group of phase coils includes two symmetrically arranged formed coils; the formed coils include an upper arc-shaped connecting section, a left vertical connecting section, a lower arc-shaped connecting section and a right vertical connecting section, the upper arc-shaped connecting section and the lower arc-shaped connecting section have the same structure, the left vertical connecting section and the right vertical connecting section have the same structure, the upper arc-shaped connecting section is located directly above the lower arc-shaped connecting section, and the two ends of the inner side wall of the upper arc-shaped connecting section are connected to the lower arc-shaped connecting section through the left vertical connecting section and the right vertical connecting section respectively.

2. A winding structure according to claim 1, characterized in that: The formed coil is a self-adhesive enameled wire.

3. A winding structure according to claim 2, characterized in that: The formed coil comprises a conductor and a self-adhesive paint layer wrapped on the surface of the conductor, and the conductor is a flat copper wire.

4. A winding structure according to claim 1, characterized in that: The surface of the iron core is coated with insulating material or pasted with insulating paper.

5. A winding structure according to claim 1, characterized in that: The upper arc-shaped connecting sections in each coil layer are of the same size, and the cross-sectional sizes of the left vertical connecting sections in each coil layer are of the same size. The left vertical connecting sections in the multiple coil layers increase in height from the outside to the inside, and the height of the left vertical connecting section of the outer coil layer in two adjacent coil layers is not less than the sum of the height of the left vertical connecting section of the inner coil layer and twice the height of the upper arc-shaped connecting section of the outer coil layer.

6. A winding structure according to claim 5, characterized in that: The coil layer has four layers.

7. A winding structure according to claim 6, characterized in that: The cross sections of the left vertical connection section and the right vertical connection section are both arranged in an annular arc shape, and all the left vertical connection sections and all the right vertical connection sections of the four coil layers are arranged in an annular shape.

8. A winding structure according to claim 1, characterized in that: The formed coil has a symmetrical structure.

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