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

Abstract

The invention provides a 72-slot 8-pole 6-layer full-pitch flat wire winding stator and a motor, the 72-slot 8-pole 6-layer full-pitch flat wire winding stator 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 mounted 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. Through cross-layer linear combination, the circulating 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 present invention relates to the technical field of motor windings, and in particular to a 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator and a motor. Background Art

[0002] With the continuous advancement of motor technology, flat wire windings have been widely used in the motor industry due to their efficient heat dissipation performance and compact structural design. However, when implementing the three-branch connection solution, the existing flat wire winding technology exposes many problems, which seriously affect the overall performance and production efficiency of the motor.

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

[0004] Secondly, existing designs use a large number of special-shaped coils, and the design, manufacturing and assembly processes of these special-shaped coils are complicated, which increases the difficulty of coil manufacturing and is not conducive to mass production. It also poses challenges to the overall consistency and reliability of the winding.

[0005] In addition, when the existing flat wire winding is connected in three branches, there is a problem of asymmetry in the winding branches. This asymmetry leads to differences in electrical parameters such as back electromotive force, resistance, and inductance between different branches. These differences not only affect the performance of the motor, but also easily generate circulating currents in the windings. The existence of circulating currents not only increases the additional loss of the motor and reduces efficiency, but may also cause local overheating of the motor, further affecting the reliability and service life of the motor. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem of the winding structure limiting the stator performance in the prior art, and to provide a 72-slot 8-pole 6-layer full-pitch flat wire winding stator and motor.

[0007] To solve the above technical problems, the present invention provides a 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator, which includes: an iron core, the iron core includes a main body and a plurality of accommodating slots, the main body is a hollow annular structure, and a plurality of the accommodating slots are evenly spaced along the inner surface of the main body to arrange the stator winding, the stator winding includes a three-phase winding installed on the iron core, the number of slots per pole and 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 3 winding branch structures connected in parallel with each other.

[0008] In one embodiment of the present invention, the six-layer structure of the three-phase winding arrangement is, from inside to outside, an inner layer, a second inner layer, a first middle layer, a second middle layer, a second outer layer and an outer layer.

[0009] In one embodiment of the present invention, the inner layer and the sub-inner layer both include U-shaped span 7 conductors and U-shaped span 10 conductors.

[0010] In one embodiment of the present invention, both the first intermediate layer and the second intermediate layer include a U-shaped span 7 conductor and a U-shaped span 10 conductor.

[0011] In one embodiment of the present invention, the outer layer and the sub-outer layer both include U-shaped span 7 conductors and U-shaped span 10 conductors.

[0012] In one embodiment of the present invention, the outer layer includes 9 U-shaped conductors, and outer surfaces of adjacent U-shaped conductors are fixedly connected to each other.

[0013] In one embodiment of the present invention, the U-phase winding in the three-phase winding includes a plurality of unit windings connected in series.

[0014] In one embodiment of the present invention, the three parallel winding branches in the winding of any phase are evenly distributed in the radial direction of the iron core to homogenize the current density.

[0015] In one embodiment of the present invention, the lead wires of the stator windings of any phase are arranged in the innermost layer or the outermost layer of the six-layer structure.

[0016] The present invention also provides a motor, which includes the above-mentioned 72-slot, 8-pole, 6-layer full-pitch flat wire winding stator.

[0017] The above technical solution of the present invention has the following advantages compared with the prior art: The 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator and motor described in the present invention adopts a stator winding with 3 slots per pole per phase, and each phase winding is composed of 3 branches with full-pitch windings in parallel, which achieves the unity of multiple technical advantages and economic effects. First of all, this design ensures the balanced distribution of current in each branch, and effectively reduces the circulating current inside the winding through the cross-layer line combination, thereby significantly reducing the resistance loss and heat loss, and improving the running 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 a guarantee for the smooth operation of the motor in various environments.

[0018] In addition, the simplified design of the outer connection part improves production efficiency, reduces manufacturing costs, and increases the product qualification rate. 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 of the motor, reduces the volume, and improves space utilization, but also provides the possibility of miniaturization and lightweighting of the motor, making it more suitable for application scenarios with strict restrictions on space and weight.

[0019] 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 user's operating costs and complying with the development trend of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a stator with 72 slots, 8 poles, 6 layers and full-pitch flat wire windings in a preferred embodiment of the present invention; Figure 2 yes Figure 1 The three-dimensional structure diagram of the inner layer U-shaped conductor in the stator with 72 slots, 8 poles and 6 layers of full-pitch flat wire winding is shown; Figure 3 yes Figure 1 The three-dimensional structure schematic diagram of the outer layer U-shaped conductor of the stator with 72 slots, 8 poles and 6 layers of full-pitch flat wire winding is shown; Figure 4 yes Figure 1 The three-dimensional structure schematic diagram of the first middle layer U-shaped conductor in the 72-slot 8-pole 6-layer full-pitch flat wire winding stator is shown; Figure 5 yes Figure 1 The three-dimensional structure schematic diagram of the inner U-shaped conductor in the 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator is shown.

[0022] Description of the accompanying drawings in the specification: 100, iron core; 110, body; 120, accommodating slot; 200, stator winding; 210, U-shaped conductor. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0024] See also Figure 1As shown, this embodiment provides a 72-slot 8-pole 6-layer full-pitch flat wire winding stator, which includes: an iron core 100, the iron core 100 includes a main body 110 and a plurality of accommodating grooves 120, the main body 110 is a hollow annular structure, and a plurality of the accommodating grooves 120 are evenly spaced along the inner surface of the main body 110. The stator winding 200 includes a three-phase winding installed on the iron core 100, and the number of slots per pole and per phase is 3. The three-phase winding forms a 6-layer structure arranged in sequence in the radial direction of the iron core 100, wherein each phase winding can form 3 winding branch structures connected in parallel with each other.

[0025] The 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator described in this embodiment uses a stator winding 200 with 3 slots per pole per phase, and each phase winding is composed of 3 branches with full-pitch windings in parallel, which achieves the unity of multiple technical advantages and economic effects. First of all, this design ensures the balanced distribution of current in each branch, and effectively reduces the circulating current inside the winding through the cross-layer line combination, thereby significantly reducing the resistance loss and heat loss, and improving the running 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 a guarantee for the smooth operation of the motor in various environments.

[0026] In addition, the simplified design of the outer connection part improves production efficiency, reduces manufacturing costs, and increases the product qualification rate. 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 of the motor, reduces the volume, and improves space utilization, but also provides the possibility of miniaturization and lightweighting of the motor, making it more suitable for application scenarios with strict restrictions on space and weight.

[0027] 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 user's operating costs and complying with the development trend of energy conservation and emission reduction.

[0028] See also Figure 1 and Figure 2 As shown, the core 100 in this embodiment is provided with a plurality of accommodating grooves 120 for accommodating the stator winding 200. Each of the accommodating grooves 120 extends along the height direction of the core and is recessed from the inner surface of the core 100 toward the outer surface thereof. Furthermore, the accommodating grooves 120 in this embodiment are all blind grooves.

[0029] In this embodiment, the six-layer structure of the three-phase winding arrangement is, from the inside to the outside, an inner layer, a second inner layer, a first middle layer, a second middle layer, a second outer layer, and an outer layer. Figures 3 to 5As shown, the inner layer and the sub-inner layer both include U-shaped span 7 conductors and U-shaped span 10 conductors, the first middle layer and the second middle layer both include U-shaped span 7 conductors and U-shaped span 10 conductors, and the outer layer and the sub-outer layer both include U-shaped span 7 conductors and U-shaped span 10 conductors. Specifically, in the three mutually parallel winding branch structures formed by any phase winding in this embodiment, the slot numbers through which the winding branches located inside are connected are: 1(6)→11(5)→20(6)→30(5)→39(6)→46(5)→55(6)→65(5)→ 2(4)→12(3)→21(4)→28(3)→37(4)→47(3)→56(4)→66(3)→ 3(2)→10(1)→19(2)→29(1)→38(2)→48(1)→57(2)→64(1)→ 2(1)→64(2)→55(1)→48(2)→39(1)→29(2)→20(1)→10(2)→ 1(3)→66(4)→57(3)→47(4)→38(3)→28(4)→19(3)→12(4)→ 3(5)→65(6)→56(5)→46(6)→37(5)→30(6)→21(5)→11(6).

[0030] The slot numbers through which the winding branch located in the middle is connected are: 2(6)→12(5)→21(6)→28(5)→37(6)→47(5)→56(6)→66(5)→ 3(4)→10(3)→19(4)→29(3)→38(4)→48(3)→57(4)→64(3)→ 1(2)→11(1)→20(2)→30(1)→39(2)→46(1)→55(2)→65(1)→ 3(1)→65(2)→56(1)→46(2)→37(1)→30(2)→21(1)→11(2)→ 2(3)→64(4)→55(3)→48(4)→39(3)→29(4)→20(3)→10(4)→ 1(5)→66(6)→57(5)→47(6)→38(5)→28(6)→19(5)→12(6).

[0031] The slot numbers through which the winding branches located on the outer layer are connected are: 3(6)→10(5)→19(6)→29(5)→38(6)→48(5)→57(6)→64(5)→ 1(4)→11(3)→20(4)→30(3)→39(4)→46(3)→55(4)→65(3)→ 2(2)→12(1)→21(2)→28(1)→37(2)→47(1)→56(2)→66(1)→ 1(1)→66(2)→57(1)→47(2)→38(1)→28(2)→19(1)→12(2)→ 3(3)→65(4)→56(3)→46(4)→37(3)→30(4)→21(3)→11(4)→ 2(5)→64(6)→55(5)→48(6)→39(5)→329(6)→20(5)→10(6).

[0032] Through this innovative connection method, although the number of line types has reached 6, we have cleverly avoided the same-layer cross-connection. This design not only significantly reduces the end height of the winding, but also makes the winding arrangement more regular and compact. This optimized arrangement method greatly reduces the difficulty of the winding process, making the production process smoother, thereby making cost control and product yield more controllable. This design not only improves the overall aesthetics of the motor, but also improves production efficiency and reduces material consumption without sacrificing performance, further enhancing the market competitiveness of the product. In general, the adoption of this connection method is a highlight in motor design. It achieves a win-win situation of high efficiency and low cost, and has made important contributions to the technological progress and economic benefits of the motor industry.

[0033] Wherein, the outer layer includes 9 U-shaped conductors 210, and the outer surfaces of adjacent U-shaped conductors 210 are fixedly connected to each other. Based on this, the above structure achieves 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, while improving the heat dissipation efficiency and current uniformity, simplifying the manufacturing process, reducing production costs, and making the motor easier to maintain. These comprehensive advantages make this solution outstanding in improving motor performance and economic benefits, suitable for a variety of motor types, and meet the requirements of modern motor design for high efficiency, reliability and economy.

[0034] In this embodiment, the three parallel winding branches in the winding of any phase are evenly distributed in the radial direction of the iron core 100, thereby achieving the purpose of uniform current density. In addition, the lead wires of the stator winding 200 of any phase in this embodiment are arranged in the innermost layer or the outermost layer of the 6-layer structure, and the present invention does not make any specific restrictions on this. Embodiment 2

[0035] This embodiment provides a motor, which includes the 72-slot, 8-pole, 6-layer full-pitch flat wire winding stator described in the first embodiment.

[0036] In summary, the 72-slot 8-pole 6-layer full-pitch flat wire winding stator and motor described in the present invention adopts a stator winding 200 with 3 slots per pole per phase, and each phase winding is composed of 3 branches with full-pitch windings in parallel, which achieves the unity of multiple technical advantages and economic effects. First of all, this design ensures the balanced distribution of current in each branch, and effectively reduces the circulating current inside the winding through the cross-layer line combination, thereby significantly reducing the resistance loss and heat loss, and improving the running 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 a guarantee for the smooth operation of the motor in various environments.

[0037] In addition, the simplified design of the outer connection part improves production efficiency, reduces manufacturing costs, and increases the product qualification rate. 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 of the motor, reduces the volume, and improves space utilization, but also provides the possibility of miniaturization and lightweighting of the motor, making it more suitable for application scenarios with strict restrictions on space and weight.

[0038] 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 user's operating costs and complying with the development trend of energy conservation and emission reduction.

[0039] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator, characterized in that: include: The iron core comprises a body and a plurality of receiving grooves, the body is a hollow ring structure, and the plurality of receiving grooves are evenly spaced along the inner surface of the body The stator winding comprises a three-phase winding installed on the iron core, wherein the number of slots per pole and per phase is 3, and 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 3 winding branch structures connected in parallel with each other.

2. The 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator according to claim 1, characterized in that: The six-layer structure of the three-phase winding arrangement is, from inside to outside, an inner layer, a second inner layer, a first middle layer, a second middle layer, a second 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 sub-inner layer both include U-shaped span 7 conductors and U-shaped span 10 conductors.

4. The 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator according to claim 2, characterized in that: The first intermediate layer and the second intermediate layer both include a U-shaped span 7 conductor and a U-shaped span 10 conductor.

5. The 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator according to claim 2, characterized in that: The outer layer and the sub-outer layer both include a U-shaped span 7 conductor and a U-shaped span 10 conductor.

6. The 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator according to claim 2 or 5, characterized in that: The outer layer includes 9 U-shaped conductors, and outer surfaces of adjacent U-shaped conductors are fixedly connected 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 includes 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 branches in the winding of any phase are evenly distributed in the radial direction of the iron core to uniformly distribute 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 wires of the stator winding of any phase are arranged in the innermost layer or the outermost layer of the six-layer structure.

10. A motor, characterized in that: It comprises the 72-slot, 8-pole, 6-layer, full-pitch flat wire winding stator as described in any one of claims 1 to 9.

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