72-slot 8-pole 6-layer full-pitch flat wire winding stator and motor

Abstract

The utility model provides a 72-slot 8-pole 6-layer full pitch flat wire winding stator and motor, which comprises an iron core, the iron core comprises a body and a plurality of accommodating slots, the body is of a hollow annular structure, stator windings are uniformly arranged in the accommodating slots along the inner surface of the body at intervals, each stator winding comprises a three-phase winding arranged on the iron core, the number of slots per pole per phase is 3, and the number of slots per pole per phase is 3; the three-phase winding forms a six-layer structure which is sequentially arranged in the radial direction of the iron core, and each phase winding can form three winding branch structures which are mutually connected in parallel. According to the utility model, through cross-layer linear combination, ring current in the winding is effectively reduced, so that the operation stability and reliability of the motor are improved. The simplified design of the outer layer connecting part not only reduces the processing strength, but also shortens the production cycle. Most importantly, the optimization measures act together, and the operation efficiency of the motor is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor winding technical field, concretely refers to a kind of 72 slot 8 pole 6 layer flat wire winding stator and motor. BACKGROUND

[0002] With the continuous progress of motor technology, flat wire winding is widely used in motor industry due to its efficient heat dissipation performance and compact structure design. However, when implementing the 3-branch connection scheme, the existing flat wire winding technology exposes many problems, which seriously affect the overall performance and production efficiency of the motor.

[0003] Firstly, the existing flat wire winding has various types of hairpin coils and complex arrangement in the 3-branch design. In order to achieve effective connection of each phase winding branch and center point, a large number of bus bars and bus bars are needed, which not only increases the complexity of the winding, but also increases the height of the winding end, thereby prolonging the axial length of the motor, which is not conducive to the compact design and space optimization of the motor.

[0004] Secondly, many special-shaped coils are used in the existing design, which have complex design, manufacturing and assembly processes, increasing the manufacturing difficulty of the coils, which is not conducive to mass production, and also challenges the overall consistency and reliability of the winding.

[0005] In addition, the existing flat wire winding has the problem of asymmetric winding branches when connected in 3 branches. This asymmetry causes differences in electrical parameters such as back electromotive force, resistance, and inductance between different branches, which not only affects the performance of the motor, but also easily generates circulating current in the winding. The existence of circulating current not only increases the additional loss of the motor, reduces the efficiency, but also may cause local overheating of the motor, further affecting the reliability and service life of the motor. SUMMARY

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the limitation of the winding structure on the performance of the stator, and to provide a 72-slot 8-pole 6-layer flat wire winding stator and motor.

[0007] To solve the above technical problems, the utility model provides a 72-slot 8-pole 6-layer flat wire winding stator, which comprises: an iron core, the iron core comprises a body and a plurality of accommodation slots, the body is a hollow ring structure, a plurality of accommodation slots are uniformly spaced along the inner surface of the body to form a stator winding, the stator winding comprises three-phase winding installed on the iron core, the number of slots per pole per phase is 3, the three-phase winding forms a 6-layer structure arranged in sequence in the radial direction of the iron core, wherein each phase winding can form three parallel winding branch structures.

[0008] In an embodiment of the utility model, the 6 layers structure of three phase winding arrangement is from inside to outside in turn inside layer, secondary inside layer, first intermediate layer, second intermediate layer, secondary outside layer and outside layer.

[0009] In an embodiment of the utility model, the inside layer and the secondary inside layer all include U type cross 7 conductor and U type cross 10 conductor.

[0010] In an embodiment of the utility model, the first intermediate layer and the second intermediate layer all include U type cross 7 conductor and U type cross 10 conductor.

[0011] In an embodiment of the utility model, the outside layer and the secondary outside layer all include U type cross 7 conductor and U type cross 10 conductor.

[0012] In an embodiment of the utility model, the outside layer includes 9 U type conductors, and adjacent U type conductor outer surfaces are fixedly connected with each other.

[0013] In an embodiment of the utility model, the U phase winding in the three phase winding includes a plurality of unit windings in series.

[0014] In an embodiment of the utility model, the 3 parallel winding branches in the winding of any phase are evenly distributed in the radial direction of the iron core to homogenize current density.

[0015] In an embodiment of the utility model, the lead-out wire of the stator winding of any phase is arranged in the innermost layer or the outermost layer in the 6 layer structure.

[0016] The utility model also provides a motor, which comprises the 72 slot 8 pole 6 layer whole distance flat wire winding stator.

[0017] The above technical scheme of the utility model has the following advantages compared with the prior art.

[0018] The 72 slot 8 pole 6 layer whole distance flat wire winding stator and the motor adopt the stator winding every pole every phase slot number 3, and every phase winding is by 3 branch winding whole distance winding parallel structure, realize the unity of multiple technical advantages and economic effect. First, this design ensures the balanced distribution of current in each branch, effectively reduces the circulating current in the winding through the cross layer line type combination, thereby significantly reduces the resistance loss and heat loss, improves the operation stability and reliability of the motor. At the same time, the reasonable busbar design further eliminates the loop current, reduces the electromagnetic interference, enhances the electromagnetic compatibility of the motor, and provides protection for the smooth operation of the motor in various environments.

[0019] In addition, the simplified design of the outer layer connecting portion improves production efficiency, reduces manufacturing costs, and enhances product qualification rates. This not only reduces processing intensity but also shortens the production cycle. At the same time, the reduced end height not only reduces the weight and size of the motor, improves space utilization, but also provides the possibility of miniaturization and light weight, making it more suitable for application scenarios with strict space and weight restrictions.

[0020] Most importantly, these optimization measures work together to significantly improve the operating efficiency of the motor. By reducing energy loss, the motor can achieve more efficient energy conversion under the same load, thereby reducing user operating costs and meeting the development trend of energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the content of the utility model more easily understood clearly, the following is according to the specific embodiment of the utility model and combines the attached drawing, and the utility model is further detailed.

[0022] Figure 1 It is the three-dimensional structure schematic diagram of the 72-slot 8-pole 6-layer flat wire winding stator in the preferred embodiment of the utility model;

[0023] Figure 2 It is Figure 1 The three-dimensional structure schematic diagram of the inner layer U-shaped conductor in the 72-slot 8-pole 6-layer flat wire winding stator shown in the figure;

[0024] Figure 3 It is Figure 1 The three-dimensional structure schematic diagram of the outer layer U-shaped conductor in the 72-slot 8-pole 6-layer flat wire winding stator shown in the figure;

[0025] Figure 4 It is Figure 1 The three-dimensional structure schematic diagram of the first intermediate layer U-shaped conductor in the 72-slot 8-pole 6-layer flat wire winding stator shown in the figure;

[0026] Figure 5 It is Figure 1 The three-dimensional structure schematic diagram of the inner layer U-shaped conductor in the 72-slot 8-pole 6-layer flat wire winding stator shown in the figure.

[0027] The attached drawing of the specification is explained: 100, iron core;110, body;120, accommodating groove;200, stator winding;210, U-shaped conductor. DETAILED DESCRIPTION

[0028] The utility model is further explained in combination with the attached drawing and specific embodiment, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model. Example one

[0029] Referring to Figure 1 As shown in the drawings, the embodiment provides a 72-slot 8-pole 6-layer flat wire winding stator, which comprises a core 100, the core 100 comprises a body 110 which is a hollow ring structure, and a plurality of accommodation slots 120 which are uniformly spaced along the inner surface of the body 110. A stator winding 200 is mounted on the core 100, the stator winding 200 comprises three-phase windings, the number of slots per phase per pole is 3, and the three-phase windings form a 6-layer structure arranged in sequence in the radial direction of the core 100, wherein each phase winding can form three parallel winding branch structures.

[0030] In the 72-slot 8-pole 6-layer flat wire winding stator described in the embodiment, the number of slots per phase per pole of the stator winding 200 is 3, and each phase winding is composed of three parallel winding branch structures, which realizes the unity of multiple technical advantages and economic effects. First of all, this design ensures the balanced distribution of current in each branch, effectively reduces the circulating current in the winding through cross-layer linear combination, thereby significantly reducing resistance loss and heat loss, and improving the operation stability and reliability of the motor. At the same time, the reasonable busbar design further eliminates the loop current, reduces electromagnetic interference, enhances the electromagnetic compatibility of the motor, and provides protection for the smooth operation of the motor in various environments.

[0031] In addition, the simplified design of the outer connection part improves production efficiency, reduces manufacturing cost, and improves product qualification rate. Thus not only reduces the processing strength, but also shortens the production cycle. At the same time, the reduced end height not only reduces the weight and size of the motor, improves the space utilization rate, but also provides the possibility for the miniaturization and light weight of the motor, making it more suitable for application scenarios with strict space and weight restrictions.

[0032] Most importantly, these optimization measures work together to significantly improve the operating efficiency of the motor. By reducing energy loss, the motor can achieve more efficient energy conversion under the same load, thereby reducing the operating cost of the user and meeting the development trend of energy saving and emission reduction.

[0033] Referring to Figure 1 and Figure 2 As shown in the drawings, the core 100 in the embodiment is internally provided with a plurality of accommodation slots 120 for accommodating the stator winding 200, any of the accommodation slots 120 extends along the height direction of the core 100, and is recessed from the inner surface to the outer surface of the core 100. Further, the accommodation slots 120 in the embodiment are blind slots.

[0034] In the embodiment, the 6-layer structure of the three-phase winding arrangement is sequentially arranged from inside to outside as an inner layer, a sub-inner layer, a first intermediate layer, a second intermediate layer, a sub-outer layer, and an outer layer. Specifically, referring to FIG. 6, the inner layer and the sub-inner layer each include U-shaped cross-7 conductors and U-shaped cross-10 conductors, the first intermediate layer and the second intermediate layer each include U-shaped cross-7 conductors and U-shaped cross-10 conductors, and the outer layer and the sub-outer layer each include U-shaped cross-7 conductors and U-shaped cross-10 conductors. Specifically, in the three winding branch structures in parallel with each other formed by any phase winding in the embodiment, the winding branch connected through the slot numbers from inside to outside are as follows: Figures 3 to 5

[0035] 1(6)→11(5)→20(6)→30(5)→39(6)→46(5)→55(6)→65(5)→

[0036] 2(4)→12(3)→21(4)→28(3)→37(4)→47(3)→56(4)→66(3)→

[0037] 3(2)→10(1)→19(2)→29(1)→38(2)→48(1)→57(2)→64(1)→

[0038] 2(1)→64(2)→55(1)→48(2)→39(1)→29(2)→20(1)→10(2)→

[0039] 1(3)→66(4)→57(3)→47(4)→38(3)→28(4)→19(3)→12(4)→

[0040] 3(5)→65(6)→56(5)→46(6)→37(5)→30(6)→21(5)→11(6).

[0041] The winding branch connected through the slot numbers from inside to outside are as follows:

[0042] 2(6)→12(5)→21(6)→28(5)→37(6)→47(5)→56(6)→66(5)→

[0043] 3(4)→10(3)→19(4)→29(3)→38(4)→48(3)→57(4)→64(3)→

[0044] 1(2)→11(1)→20(2)→30(1)→39(2)→46(1)→55(2)→65(1)→

[0045] 3(1)→65(2)→56(1)→46(2)→37(1)→30(2)→21(1)→11(2)→ ​

[0046] 2(3)→64(4)→55(3)→48(4)→39(3)→29(4)→20(3)→10(4)→

[0047] 1(5)→66(6)→57(5)→47(6)→38(5)→28(6)→19(5)→12(6).

[0048] The slot numbers passed by the winding branch located in the outer layer are:

[0049] 3(6)→10(5)→19(6)→29(5)→38(6)→48(5)→57(6)→64(5)→

[0050] 1(4)→11(3)→20(4)→30(3)→39(4)→46(3)→55(4)→65(3)→

[0051] 2(2)→12(1)→21(2)→28(1)→37(2)→47(1)→56(2)→66(1)→

[0052] 1(1)→66(2)→57(1)→47(2)→38(1)→28(2)→19(1)→12(2)→

[0053] 3(3)→65(4)→56(3)→46(4)→37(3)→30(4)→21(3)→11(4)→

[0054] 2(5)→64(6)→55(5)→48(6)→39(5)→329(6)→20(5)→10(6).

[0055] Through this innovative connection method, although the number of wire types reaches 6, we ingeniously avoid cross-layer connections, which not only significantly reduces the end height of the winding, but also makes the winding arrangement more regular and compact. This optimized arrangement greatly reduces the difficulty of the winding process, making the production process smoother, thus making cost control and product yield more controllable. This design not only enhances the overall aesthetics of the motor, but also improves production efficiency and reduces material consumption without sacrificing performance, further enhancing the product's market competitiveness. Overall, the adoption of this connection method is a highlight in motor design, achieving a win-win of high efficiency and low cost, making an important contribution to the technological progress and economic benefit improvement of the motor industry.

[0056] The outer layer comprises 9 U-shaped conductors 210, and the outer surfaces of adjacent U-shaped conductors 210 are fixed to each other. Based on this, the above structure realizes multiple advantages such as compact structure, reliable electrical connection, high mechanical strength, good heat dissipation performance, reduced manufacturing cost, improved production efficiency, convenient maintenance, uniform current distribution, and strong adaptability. This design not only optimizes the space utilization of the motor and improves the stability of the electrical connection, but also enhances the overall mechanical strength and durability of the winding, improves the heat dissipation efficiency and current uniformity, simplifies the manufacturing process, reduces the production cost, and makes the motor more easy to maintain. These comprehensive advantages make the scheme excellent in improving the performance and economic benefit of the motor, and it is suitable for various types of motors, meeting the requirements of modern motor design for high efficiency, reliability and economy.

[0057] In the embodiment, the three parallel winding branches in the winding of any phase are uniformly distributed in the radial direction of the iron core 100, thereby achieving the purpose of uniformizing the current density. In addition, the lead-out wire of the stator winding 200 of any phase in the embodiment is arranged in the innermost layer or the outermost layer of the 6-layer structure, and the utility model does not make specific limitation on this. Embodiment two

[0058] The embodiment provides a motor comprising the 72-slot 8-pole 6-layer concentrated-flat-wire winding stator in embodiment one.

[0059] In summary, the 72-slot 8-pole 6-layer concentrated-flat-wire winding stator and motor of the utility model adopt a stator winding 200 with 3 slots per pole per phase, and each phase winding is composed of 3 parallel winding branches, which realizes the unity of multiple technical advantages and economic effects. First of all, this design ensures the balanced distribution of current in each branch, effectively reduces the circulating current in the winding through cross-layer linear combination, thereby significantly reducing the resistance loss and heat loss, and improving the operation stability and reliability of the motor. At the same time, the reasonable busbar design further eliminates the loop current, reduces the electromagnetic interference, and enhances the electromagnetic compatibility of the motor, providing protection for the smooth operation of the motor in various environments.

[0060] In addition, the simplified design of the outer layer connection part improves the production efficiency, reduces the manufacturing cost, and improves the product qualification rate. Therefore, not only the processing strength is reduced, but also the production cycle is shortened. At the same time, the reduced end height not only reduces the weight and size of the motor, improves the space utilization, but also provides the possibility for the miniaturization and light weight of the motor, making it more suitable for application scenarios with strict space and weight restrictions.

[0061] Most importantly, these optimization measures work together to significantly improve the operating efficiency of the motor. By reducing energy loss, the motor can achieve more efficient energy conversion under the same load, thereby reducing the operating cost of the user and meeting the development trend of energy saving and emission reduction.

[0062] Obviously, the above embodiments are only examples for the sake of clarity, and are not limiting of the embodiments. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A 72-slot 8-pole 6-layer fractional-slot distributed-winding stator, characterized by: The application relates to a 72-slot 8-pole 6-layer concentrated flat wire winding stator. The iron core comprises a body and a plurality of accommodating grooves, the body is a hollow annular structure, and the plurality of accommodating grooves are uniformly arranged along the inner surface of the body. The stator winding comprises three-phase windings mounted on the iron core, the number of slots per pole per phase is 3, the three-phase windings form a 6-layer structure arranged in sequence in the radial direction of the iron core, each phase winding can form three parallel winding branch structures.

2. The 72-slot 8-pole 6-layer fractional-slot concentric flat conductor winding stator of claim 1, wherein: The 6-layer structure of the three-phase winding is sequentially arranged from inside to outside as an inner layer, a secondary inner layer, a first intermediate layer, a second intermediate layer, a secondary outer layer and an outer layer.

3. The 72-slot, 8-pole, 6-layer full-pitch flat wire winding stator according to claim 2, characterized in that: The inner layer and the secondary inner layer each comprise U-shaped 7-span conductors and U-shaped 10-span conductors.

4. The 72-slot 8-pole 6-layer fractional-slot concentric flat wire winding stator of claim 2, wherein: The first intermediate layer and the second intermediate layer each comprise U-shaped 7-span conductors and U-shaped 10-span conductors.

5. The 72-slot 8-pole 6-layer fractional-slot concentric wound stator winding of claim 2, wherein: The outer layer and the secondary outer layer each comprise U-shaped 7-span conductors and U-shaped 10-span conductors.

6. The 72-slot 8-pole 6-layer fractional-slot concentric wound flat wire stator of claim 2 or 5, wherein: The outer layer comprises nine U-shaped conductors, and the outer surfaces of adjacent U-shaped conductors are fixed to each other.

7. The 72-slot, 8-pole, 6-layer full-pitch flat wire winding stator according to claim 2, characterized in that: The U-phase winding in the three-phase winding comprises a plurality of unit windings connected in series.

8. The 72-slot, 8-pole, 6-layer full-pitch flat wire winding stator according to claim 1, characterized in that: The three parallel winding branch structures in the winding of any phase are uniformly distributed in the radial direction of the iron core to homogenize the current density.

9. The 72-slot, 8-pole, 6-layer full-pitch flat wire winding stator according to claim 1, characterized in that: The lead-out wire of the stator winding of any phase is arranged in the innermost layer or the outermost layer of the 6-layer structure.

10. An electric machine characterized by: The application further relates to a 72-slot 8-pole 6-layer concentrated flat wire winding stator.

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