Winding structure of flat wire motor stator

Abstract

The utility model belongs to the technical field of flat wire motors, and particularly relates to a winding structure of a flat wire motor stator, which comprises a stator core and a rotor assembly, a first through groove is arranged on the surface of the stator core, a second through groove is arranged on the surface of the stator core, a first flat copper-clad cable is arranged in the first through groove, and a second flat copper-clad cable is arranged in the second through groove. A second flat copper-clad cable is arranged in the second through groove, the first through groove and the second through groove are staggered in position, and a pipe groove is formed in the inner wall of the stator iron core. The pipe groove is matched with the cooling pipe, the first annular pipe and the second annular pipe, an axial cooling channel can be formed through combination, cooling liquid enters the cooling pipe through the first annular pipe, and the cooling pipe is located in the pipe groove and penetrates through the stator iron core through the pipe groove, so that direct contact with a high-temperature area of the stator iron core is facilitated, and the cooling liquid in the cooling pipe can take away heat through flowing; the spiral cooling pipe is matched with the spiral pipe groove to form a spiral cooling channel, and the spiral cooling pipe is matched with the axial cooling channel to form double-channel cooling.

Description

Technical Field

[0001] This utility model belongs to the field of flat wire motor technology, specifically relating to the winding structure of the stator of a flat wire motor. Background Technology

[0002] Flat-wire motors, also known as hairpin motors, use flat copper wire in their stator windings. The windings are shaped like hairpins, threaded into the stator slots, and then the ends are soldered together. Theoretically, by changing round wire to flat wire, under the same space constraints, flat-wire motors can achieve a 70% slot fill factor, increasing the copper fill factor by 20-30%, generating a stronger magnetic field, which is equivalent to a 20-30% increase in power. The advantages of flat-wire motors are: smaller size, less material, and lower cost for the same power output, or increased slot fill factor and power density for the same volume.

[0003] The existing flat wire motor stator winding uses rectangular wires arranged closely together, which can improve the slot fill factor, but has the following drawbacks: heat dissipation inside the winding is difficult, insulation failure is easily caused in high temperature environment, and the risk of local overheating is high. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a winding structure for the stator of a flat wire motor, which solves the problems of difficult heat dissipation inside the winding, easy insulation failure under high temperature environment, and high risk of local overheating.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a winding structure for a flat wire motor stator, comprising a stator core and a rotor assembly. The surface of the stator core has a first through slot and a second through slot. A flat copper-clad cable is installed inside the first through slot, and a second flat copper-clad cable is installed inside the second through slot. The positions of the first and second through slots are staggered. A tube groove is formed on the inner wall of the stator core, and a cooling pipe is installed inside the tube groove. One end of the cooling pipe is fixedly connected to an annular tube, and the other end of the cooling pipe is fixedly connected to an annular tube. A spiral tube groove is formed on the surface of the stator core, and a spiral cooling pipe is installed inside the spiral tube groove. Insulating paper is installed inside both the first and second through slots.

[0006] Preferably, both the first and second through slots are arranged in a circular array.

[0007] Preferably, both the flat copper-clad cable one and the flat copper-clad cable two are arranged in a circumferential array, with the flat copper-clad cable one installed in the through groove one and the flat copper-clad cable two installed in the through groove two.

[0008] Preferably, the cooling pipe includes a first straight pipe body, a second straight pipe body, and a return pipe.

[0009] Preferably, the diameters of both the first annular tube and the second annular tube are larger than those of the cooling tube.

[0010] Preferably, an extension tube is fixedly connected to the surface of both the first annular tube and the second annular tube.

[0011] Preferably, both ends of the spiral cooling pipe are fixedly connected to an extension pipe II.

[0012] Preferably, the surface of the stator core is provided with a through groove three, and the spiral cooling pipe spirally passes through the through groove three.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The winding structure of the stator of this flat wire motor, through the combination of a slotted tube, a cooling tube, an annular tube one, and an annular tube two, can form an axial cooling channel. The coolant enters the cooling tube through the annular tube one. Since the cooling tube is located in the slotted tube, it penetrates the stator core through the slot, which is conducive to direct contact with the high-temperature area of ​​the stator core. The flow of coolant in the cooling tube can carry away heat, thereby improving the cooling efficiency. The spiral cooling tube, together with the spiral slotted tube, forms a spiral cooling channel, which, together with the above-mentioned axial cooling channel, forms a dual-channel cooling system, which is conducive to further improving the cooling efficiency of the stator core. Thermal grease can be filled between the cooling tube and the slotted tube, and between the spiral cooling tube and the spiral slotted tube to reduce thermal resistance and improve the heat conduction effect.

[0015] 2. The winding structure of the stator of the flat wire motor is such that the positions of slot one and slot two are staggered, so that flat copper-clad cable one and flat copper-clad cable two will also form a staggered arrangement after installation. This can break the continuous eddy current path generated by the continuous winding of traditional flat copper-clad cables, and is conducive to heat distribution and diffusion, avoiding heat concentration caused by continuous winding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model, used together with the embodiments of this utility model to explain this utility model, and do not constitute a limitation on this utility model. In the drawings:

[0017] Figure 1 This is a complete structural schematic diagram of the present invention;

[0018] Figure 2 This is a rear view structural diagram of the present invention;

[0019] Figure 3 This utility model is proposed Figure 1 Enlarged view of point A in the middle;

[0020] Figure 4 This is a partial cross-sectional view of the present invention;

[0021] Figure 5 This is a structural diagram of the cooling pipe of this utility model;

[0022] Figure 6 This is a structural diagram of the spiral cooling pipe of this utility model.

[0023] In the diagram: 1. Stator core; 2. Through slot one; 3. Through slot two; 4. Flat copper-clad cable one; 5. Flat copper-clad cable two; 6. Tube slot; 7. Cooling pipe; 8. Annular tube one; 9. Annular tube two; 10. Spiral tube slot; 11. Spiral cooling pipe; 12. Extension tube one; 13. Extension tube two; 14. Through slot three; 15. Rotor assembly; 16. Insulating paper; 71. Straight tube body one; 72. Straight tube body two; 73. Return pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 The present invention provides the following technical solution: a winding structure for a flat wire motor stator, including a stator core 1 and a rotor assembly 15. A through slot 1 2 and a through slot 2 3 are formed on the surface of the stator core 1. A flat copper-clad cable 4 is installed inside the through slot 1 2, and a flat copper-clad cable 5 is installed inside the through slot 2 3. The positions of the through slots 1 2 and 2 3 are staggered. A tube groove 6 is formed on the inner wall of the stator core 1. A cooling tube 7 is installed inside the tube groove 6. One end of the cooling tube 7 is fixedly connected to an annular tube 8, and the other end of the cooling tube 7 is fixedly connected to an annular tube 9. A spiral tube groove 10 is formed on the surface of the stator core 1. A spiral cooling tube 11 is installed inside the spiral tube groove 10. Insulating paper 16 is installed inside both the through slot 1 2 and the through slot 2 3.

[0026] In this embodiment, the combination of the slot 6 with the cooling pipe 7, the annular pipe 8, and the annular pipe 9 forms an axial cooling channel. The coolant enters the cooling pipe 7 through the annular pipe 8. Since the cooling pipe 7 is located inside the slot 6 and passes through the stator core 1, it is beneficial to directly contact the high-temperature area of ​​the stator core 1. The flow of coolant in the cooling pipe 7 can carry away heat, thereby improving the cooling efficiency. The spiral cooling pipe 11, together with the spiral slot 10, forms a spiral cooling channel, which, together with the above-mentioned axial cooling channel, forms a dual-channel cooling system, which is beneficial to further improve the cooling efficiency of the stator core 1. Thermal grease can be filled between the cooling pipe 7 and the slot 6, and between the spiral cooling pipe 11 and the spiral slot 10 to reduce thermal resistance and improve the heat conduction effect. By staggering the positions of the slot 1 and the slot 2, the flat copper-clad cable 4 and the flat copper-clad cable 5 will also form a staggered arrangement after installation. This can break the continuous eddy current path generated by the continuous winding of the traditional flat copper-clad cable and is beneficial to heat distribution and diffusion, avoiding heat concentration caused by continuous winding.

[0027] Specifically, both through-slot 1 2 and through-slot 2 3 are arranged in a circular array, which facilitates the assembly of flat copper-clad cable 1 4 and flat copper-clad cable 2 5.

[0028] Specifically, both the flat copper-clad cable 14 and the flat copper-clad cable 25 are arranged in a circular array. The flat copper-clad cable 14 is installed in the through groove 2, and the flat copper-clad cable 25 is installed in the through groove 3. Since the positions of the through groove 12 and the through groove 23 are misaligned, the positions of the flat copper-clad cable 14 and the flat copper-clad cable 25 in the circular array are also misaligned.

[0029] Specifically, the cooling pipe 7 includes a straight pipe body 1 71, a straight pipe body 2 72, and a return pipe 73. The coolant can flow quickly through the straight pipe body 1 71 and the straight pipe body 2 72, and return through the return pipe 73. This, together with the external pump set and cooling mechanism, is conducive to the recycling of the coolant.

[0030] Specifically, the diameters of annular tube 8 and annular tube 9 are larger than those of cooling tube 7, so the coolant capacity in annular tube 8 and annular tube 9 is larger than that in a single cooling tube 7. This facilitates the distribution of coolant into and out of each cooling tube 7 evenly, thus ensuring uniform cooling of the stator core 1 as a whole.

[0031] Specifically, extension tubes 12 are fixedly connected to the surfaces of both annular tube 8 and annular tube 9.

[0032] Specifically, both ends of the spiral cooling pipe 11 are fixedly connected to extension pipes 13.

[0033] The extension tube 12 and extension tube 2 13 can be connected to external pump sets and cooling mechanisms respectively. The axial and spiral dual cooling channels work together to dissipate heat, significantly improving motor efficiency, heat dissipation performance and reliability.

[0034] Specifically, the surface of the stator core 1 is provided with a through groove 3 14, and the spiral cooling pipe 11 spirally passes through the through groove 3 14. Through the setting of the through groove 3 14, the airflow flows axially through the through groove 3 14, which is not only conducive to the local heat dissipation of the stator core 1, but also conducive to removing some of the surface heat of the spiral cooling pipe 11.

[0035] The working principle or usage process of this utility model is as follows: The groove 6, in conjunction with the cooling pipe 7, the first annular pipe 8, and the second annular pipe 9, forms an axial cooling channel. The spiral cooling pipe 11, in conjunction with the spiral groove 10, forms a spiral cooling channel. The first extension pipe 12 and the second extension pipe 13 can be externally connected to a pump unit and a cooling mechanism to form a coolant circulation. Thermal grease can be filled between the cooling pipe 7 and the groove 6, and between the spiral cooling pipe 11 and the spiral groove 10, to reduce thermal resistance and improve heat conduction. The flat wire motor of this application has dual-channel cooling. During operation, the coolant enters the cooling pipe 7 through the first annular pipe 8. The cooling pipe 7, due to its location... Within the slot 6, the stator core 1 is penetrated, which facilitates direct contact with the high-temperature area of ​​the stator core 1. The coolant flow in the cooling pipe 7 can carry away heat, improving cooling efficiency. The spiral cooling channel works in conjunction with the aforementioned axial cooling channel to dissipate heat, significantly improving motor efficiency and heat dissipation performance. By staggering the positions of slot 1 2 and slot 2 3, the flat copper-clad cable 1 4 and flat copper-clad cable 2 5 will also form a staggered arrangement after installation. This breaks the continuous eddy current path generated by the continuous winding of traditional flat copper-clad cables and is conducive to heat distribution and diffusion, avoiding heat concentration caused by continuous winding.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of this utility model and are not intended to limit the utility model. The selection and detailed description of these embodiments in this specification are for the purpose of better explaining the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A winding structure for a flat wire motor stator, comprising a stator core (1) and a rotor assembly (15), characterized in that: The surface of the stator core (1) is provided with a through groove 1 (2) and a through groove 2 (3). A flat copper-clad cable 1 (4) is installed inside the through groove 1 (2) and a flat copper-clad cable 2 (5) is installed inside the through groove 2 (3). The positions of the through groove 1 (2) and the through groove 2 (3) are staggered. The inner wall of the stator core (1) is provided with a tube groove (6). A cooling tube (7) is installed inside the tube groove (6). One end of the cooling tube (7) is fixedly connected to an annular tube 1 (8) and the other end of the cooling tube (7) is fixedly connected to an annular tube 2 (9). The surface of the stator core (1) is provided with a spiral tube groove (10). A spiral cooling tube (11) is installed inside the spiral tube groove (10). Insulating paper (16) is installed inside both the through groove 1 (2) and the through groove 2 (3).

2. The winding structure of the flat wire motor stator according to claim 1, characterized in that: Both the first (2) and the second (3) through slots are arranged in a circular array.

3. The winding structure of the flat wire motor stator according to claim 1, characterized in that: The flat copper-clad cable 1 (4) and the flat copper-clad cable 2 (5) are arranged in a circular array, and the flat copper-clad cable 1 (4) is installed in the through groove 1 (2), and the flat copper-clad cable 2 (5) is installed in the through groove 2 (3).

4. The winding structure of the flat wire motor stator according to claim 1, characterized in that: The cooling pipe (7) includes a straight pipe body one (71), a straight pipe body two (72), and a return pipe (73).

5. The winding structure of the flat wire motor stator according to claim 1, characterized in that: The diameters of the first annular tube (8) and the second annular tube (9) are both larger than those of the cooling tube (7).

6. The winding structure of the flat wire motor stator according to claim 1, characterized in that: An extension tube (12) is fixedly connected to the surface of both the first annular tube (8) and the second annular tube (9).

7. The winding structure of the flat wire motor stator according to claim 1, characterized in that: Both ends of the spiral cooling pipe (11) are fixedly connected to extension pipes (13).

8. The winding structure of the flat wire motor stator according to claim 1, characterized in that: The surface of the stator core (1) is provided with a through groove three (14), and the spiral cooling pipe (11) spirally passes through the through groove three (14).

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