6-stage 54-slot flat wire winding, motor stator and flat wire motor

Abstract

The utility model discloses a 6-stage 54-slot flat wire winding, a motor stator and a flat wire motor, comprising a three-phase winding, and the three-phase winding comprises a single-phase winding; the slot number q of each stage and each phase of the three-phase winding is equal to 5; the single-phase windings are sequentially arranged in the stator slots at equal intervals along the circumferential direction, the proportion of the single-phase windings which are intensively arranged in the stator slots in each magnetic pole is sequentially increased to 100% and then sequentially decreased, and the initial positions of the single-phase windings in each magnetic pole are located at the slot bottoms or slot openings of the stator slots. The number of slots occupied by each stage and each phase is increased, the current distribution condition is improved, potential phase difference distribution is more uniform, the offset effect of higher harmonics during superposition is enhanced, and the higher harmonic winding coefficient, especially the fifth and seventh harmonic winding coefficients, is reduced under the condition that the fundamental wave winding coefficient is ensured; and secondly, the arrangement mode of the single-phase winding in the stator slot enables each stage and each phase to be regularly distributed in the stator slot, and the current distribution condition in the winding is optimized.

Description

Technical Field

[0001] This utility model relates to the field of flat wire motor technology, specifically to a 6-level 54-slot flat wire winding, a motor stator, and a flat wire motor. Background Technology

[0002] Flat-wire motors use flat conductors (often called "hairpin" or "U-shaped") instead of traditional round conductors in their stator windings. The difference between them and traditional permanent magnet synchronous motors lies in the structure and manufacturing process of the stator windings, resulting in differences between the harmonic winding coefficients and the fundamental winding coefficients. Flat-wire motor stator windings include full-pitch and short-pitch windings. Full-pitch windings can generate a higher fundamental magnetomotive force compared to short-pitch windings, but they easily introduce higher harmonics, increasing NVH (noise, vibration, and harshness). They are only suitable for applications where harmonic requirements are not high, such as low-speed, high-torque motors, but not for high-speed electric motors in new energy vehicles. Short-pitch windings effectively weaken higher harmonic magnetic fields, especially the 5th and 7th harmonics, effectively reducing NVH, but they weaken the amplitude of the fundamental magnetomotive force.

[0003] In the field of flat-wire motors, the fundamental winding factor indicates the degree of influence of the winding on the fundamental magnetomotive force (MMF). The closer the value is to 1, the smaller the fundamental MMF and the lower the NVH (noise, vibration, and harshness). The fundamental MMF refers to the sinusoidal magnetomotive force generated by the current in the stator winding, with the same frequency as the power supply frequency. It is the main source of the rotating magnetic field generated by the motor and determines the motor's torque output and operating efficiency. The harmonic winding factor indicates the degree of influence of the winding on the higher harmonic magnetomotive force (HMF). The smaller the value, the weaker the harmonic MMF and the lower the NVH. The harmonic MMF refers to the non-sinusoidal magnetomotive force generated by the current in the stator winding, with a frequency that is an integer multiple of the power supply frequency. Common harmonics include the 3rd, 5th, and 7th harmonics, which generate additional magnetic fields, creating load and affecting the motor's operating efficiency.

[0004] The inventors of this application have discovered that existing short-pitch windings cannot reduce the harmonic winding coefficient while maintaining a high fundamental frequency winding coefficient through winding adjustment, thereby reducing manufacturing costs and ensuring winding size and power. Utility Model Content

[0005] This invention addresses the problem that existing short-pitch windings cannot simultaneously achieve high fundamental frequency winding coefficients and low harmonic frequency winding coefficients. It provides a 6-pole 54-slot flat wire winding, a motor stator, and a flat wire motor. The specific technical solution is as follows:

[0006] A 6-level 54-slot flat wire winding is disclosed. The flat wire winding is used to cooperate with stator slots, which are formed on the inner wall of the stator core. The flat wire winding includes a three-phase winding, which includes a single-phase winding. The number of slots per phase per level of the three-phase winding is q = 5. The single-phase windings are arranged in the stator slots at equal intervals along the circumference. The proportion of single-phase windings concentrated in the stator slots in each magnetic pole increases to 100% and then decreases. The starting position of the single-phase winding in each magnetic pole is located at the bottom or opening of the stator slot.

[0007] Furthermore, the welding end and the closed end of the same branch are located at both ends of the stator core. The welding ends of the same branch are placed in adjacent stator slots in sequence, with the distance from the axis of the stator core increasing or decreasing. The welding ends of the first branch, the third branch and the second branch at the same distance from the axis of the stator core are located in adjacent stator slots in sequence. The projection of the welding end of the first branch of each magnetic pole is located clockwise in sequence at the bottom, middle and top of the adjacent stator slot, and the projection of the welding ends of the second branch and the third branch is located counterclockwise in sequence in the stator slot adjacent to the first branch.

[0008] Preferably, there is at least one single-phase winding and at most two single-phase windings in the same stator slot.

[0009] Preferably, the welding end includes: a first bend, distributed circumferentially along the stator core; a second bend, also distributed circumferentially along the stator core, the first and second bends having opposite inclination angles relative to the axis of the stator core; a connecting portion disposed at the end of the first and second bends away from the stator core, the length direction of the connecting portion being parallel to the axis of the stator core; the connecting portions disposed in the first bends being electrically connected to the connecting portions disposed in the second bends, and the span between the electrically connected first and second bends being 9.

[0010] Preferably, the single-phase winding includes a plurality of first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, and thirteenth windings located in stator slots; the main structure of the first winding is an I-shaped structure, with a first bend at one end and the end of the first winding near the closed end connected to the lead-out end; the main structures of the second to sixth windings and the eighth to twelfth windings are all U-shaped structures, with opposing first and second bends at both ends of the second to sixth windings and the eighth to twelfth windings respectively; the main structures of the seventh and thirteenth windings are both U-shaped structures, with unidirectional second bends at both ends of the seventh and thirteenth windings respectively; the bottom of the U-shaped structure forms the closed end.

[0011] Preferably, the first branch is formed by sequentially connecting the first card, the second card, the third card, the fourth card, the fifth card, the sixth card, the seventh card, the eighth card, the sixth card, the ninth card, the tenth card, the fourth card, the eleventh card, the twelfth card, the second card, and the connecting part of the first card.

[0012] Preferably, the second branch is formed by sequentially connecting the connecting parts of the first card, the second card, the twelfth card, the eleventh card, the fourth card, the tenth card, the ninth card, the sixth card, the eighth card, the thirteenth card, the sixth card, the eighth card, the ninth card, the fourth card, the tenth card, the eleventh card, the second card, the twelfth card, and the first card.

[0013] Preferably, the third branch is formed by sequentially connecting the first, twelfth, second, eleventh, tenth, fourth, ninth, eighth, sixth, thirteenth, sixth, fifth, fourth, and fourth hairpins, the second hairpin, the second hairpin, and the first hairpin.

[0014] An electric motor stator includes: a stator core, the inner wall of which is evenly distributed with stator slots, and the stator core also includes insulating paper disposed inside the stator slots; and a 6-pole 54-slot flat wire winding that cooperates with the stator slots.

[0015] A flat wire motor, including a motor stator.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0017] In this invention, the flat wire winding is a 3-phase, 6-level, 54-slot design. In the full-pitch scheme, each level and each phase occupies 3 slots, while in this invention, each level and each phase occupies 5 slots. This increases the number of slots per level and each phase, thereby improving the current distribution and making the potential phase difference distribution more uniform. The cancellation effect of higher harmonics during superposition is enhanced, thus reducing the higher harmonic winding coefficients, especially the 5th and 7th harmonic winding coefficients, while ensuring the fundamental winding coefficient. Secondly, the arrangement of the single-phase windings in the stator slots ensures that each level and each phase is regularly distributed in the stator slots, optimizing the current distribution in the windings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the motor stator of this utility model;

[0019] Figure 2 This is a schematic diagram of a single-phase winding embodiment.

[0020] Figure 3 This is a schematic diagram of the structure of the first branch embodiment;

[0021] Figure 4 This is a schematic diagram of the structure of the second branch embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of the third branch embodiment;

[0023] Figure 6 This is a schematic diagram of the structure of the first card issuing embodiment;

[0024] Figure 7 This is a schematic diagram of the structure of the seventh or thirteenth hairpin;

[0025] Figure 8 A schematic diagram of the structure of the second, third, fourth, fifth, sixth, eighth, ninth, tenth, eleventh, or twelfth hairpins;

[0026] Figure 9 This is the unfolded diagram of a three-phase winding.

[0027] In the diagram: 1. Stator core; 11. Stator slot; 12. Insulating paper; 2. Welded end; 21. First bend; 22. Second bend; 23. Connecting part; 3. Closed end; 4. Lead-out end; 5. Single-phase winding; 501. First branch; 502. Second branch; 503. Third branch; 504. First winding; 505. Second winding; 506. Third winding; 507. Fourth winding; 508. Fifth winding; 509. Sixth winding; 510. Seventh winding; 511. Eighth winding; 512. Ninth winding; 513. Tenth winding; 514. Eleventh winding; 515. Twelfth winding; 516. Thirteenth winding. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In Embodiment 3, the flat wire motor includes a motor stator, which includes a stator core 1. The inner wall of the stator core 1 is evenly distributed with a plurality of stator slots 11. The length direction of the stator slots 11 is parallel to the axial direction of the stator core 1. The flat wire is wound around the stator slots 11 to form a three-phase winding. The three-phase winding includes a lead-out terminal 4 and a neutral terminal. The lead-out terminal 4 is directly connected to an external device for power supply. The neutral terminal refers to the common connection point of the three-phase winding, which can balance the three-phase current and prevent the current in one phase from being too large, thereby protecting the motor from overload damage.

[0031] Example 1

[0032] like Figures 1 to 5 As shown, Embodiment 1 is a 6-level 54-slot flat wire winding, which is used to cooperate with stator slot 11. The stator slot 11 is formed on the inner wall of the stator core 1 and includes: a three-phase winding, a welding end 2, and a closed end 3. The three-phase winding includes a single-phase winding. The number of slots per phase per level in the three-phase winding is q = 5. The single-phase windings 5 ​​are arranged in the stator slot 11 at equal intervals along the circumference, and the proportion of single-phase windings 5 ​​concentrated in the stator slot 11 in each magnetic pole increases to 100% and then decreases. The starting position of the single-phase windings 5 ​​in each magnetic pole is located at the bottom or opening of the stator slot 11.

[0033] Each single-phase winding 5 includes a first branch 501, a third branch 503, and a second branch 502 arranged evenly along the circumference. The welding end 2 and the closed end 3 of the same branch are located at both ends of the stator core 1. The welding ends 2 of the same branch are placed in adjacent stator slots 11 in sequence, and the distance from the axis of the stator core 1 increases or decreases. The welding ends 2 of the first branch 501, the third branch 503, and the second branch 502, which are at the same distance from the axis of the stator core 1, are located in adjacent stator slots 11 in sequence.

[0034] Specifically, in Embodiment 1, a 54-slot, 6-level, 6-layer flat wire winding is used. The single-phase winding 5 adopts a short-pitch scheme, and the three-phase windings are U-phase, V-phase, and W-phase, wherein the three phases of each level are arranged in a clockwise or counterclockwise order. Next, the three-phase windings are inserted into the stator slots 11, and their two ends are connected by welding end 2 and closed end 3, respectively. Welding end 2 and closed end 3 are placed at the two axial ends of the stator slots 11, so that external current enters the three-phase windings through the lead-out end 4, and then flows through the stator core 1 to generate a magnetic field.

[0035] Specifically, in this embodiment, the winding is paired with 54 stator slots 11, and each single-phase winding 5 is paired with 5 stator slots 11, which makes the potential phase difference distribution of the U phase, V phase and W phase more uniform. When superimposed, the cancellation effect of higher harmonics is enhanced, thereby reducing the higher harmonic winding coefficient, especially the 5th and 7th harmonic winding coefficients, while ensuring the fundamental winding coefficient.

[0036] Secondly, the first branch 501, the third branch 503, and the second branch 502 of each phase and level are arranged clockwise along the circumference and are arranged sequentially in adjacent stator slots 11 to form a single-phase winding 5. The welding end 2 and the closed end 3 of the single-phase winding 5 are located at both ends of the stator core 1, respectively. It should be noted that the three-phase winding in the stator slot 11 of this utility model is provided with 6 layers of cavities for inserting straight conductors along the radial direction. Along the radial direction of the stator core 1 from its side to the axis, the layers are the 6th, 5th, 4th, 3rd, 2nd, and 1st layers.

[0037] In this circuit, the welding ends 2 of the same branch are welded together to form a loop. One end of the straight conductor inserted into the stator slot 11 of the same branch is the welding end 2, and the other end is also connected by a conductor to form a closed end 3. The straight conductors of the same branch are inserted into adjacent stator slots 11 in a clockwise or counterclockwise manner to improve the current distribution in the same branch, thereby improving the current distribution in the single-phase winding 5, and making the current distribution in the three-phase winding more dispersed, making the magnetic field more uniform and weakening higher harmonics. Secondly, the welding ends 2 of the first branch 501, the third branch 503 and the second branch 502 of each stage and each phase are located in the same layer and are arranged in a clockwise or counterclockwise manner with the spacing of adjacent stator slots 11 as the distance, so that the span of the single-phase winding 5 is 4, thereby improving the dispersion of current in the three-phase winding and enhancing the cancellation effect of higher harmonics.

[0038] Furthermore, the welding ends 2 of the first branch 501 of each level are located clockwise in sequence at the bottom, middle and opening of the adjacent stator slot 11, and the welding ends 2 of the third branch 503 and the second branch 502 are located counterclockwise in sequence in the stator slot 11 adjacent to the first branch 501.

[0039] Specifically, the first branch 501, the third branch 503, and the second branch 502 each include three welding ends 2. The welding ends 2 of the first branch 501 are arranged sequentially in adjacent stator slots 11 along the circumferential direction, and the three welding ends 2 are located sequentially in a clockwise direction at the bottom, middle, and top of the stator slot 11, where the bottom refers to the 5th and 6th layers, the middle refers to the 3rd and 4th layers, and the top refers to the 1st and 2nd layers. The welding ends 2 of the third branch 503 and the second branch 502 are arranged in a clockwise direction. End 2 is also located in the bottom, middle and opening of the stator slot 11 in a clockwise direction. At the same time, the welding end 2 of the first branch 501, the welding end 2 of the third branch 503 and the welding end 2 of the second branch 502 are arranged in a clockwise direction at the bottom, middle or opening of the stator slot 11. The span between the welding end 2 of the first branch 501 located at the bottom of the stator slot 11 and the welding end 2 of the second branch 502 located at the opening of the stator slot 11 is 5, i.e. q = 5.

[0040] Furthermore, there is at least one single-phase winding 5 and at most two single-phase windings 5 ​​in the same stator slot 11.

[0041] Specifically, the straight conductors of each phase in each stage are inserted into the adjacent stator slots 11 in a clockwise direction, with the leftmost straight conductor inserted at the bottom of the stator slot 11. The bottom and middle of the adjacent stator slots 11 are all fitted with straight conductors of the same single-phase winding 5. The bottom, middle, and opening of the next adjacent stator slots 11 are all fitted with straight conductors of the same single-phase winding 5. Then, the middle and opening of the stator slots 11 are fitted with straight conductors of the same single-phase winding 5. Finally, the opening of the stator slots 11 is fitted with straight conductors of the same single-phase winding 5.

[0042] Secondly, the single-phase windings 5 ​​of different phases are arranged in adjacent stator slots 11 in a clockwise or counterclockwise direction, so that the stator slot 11 contains either straight conductors of the same-phase single-phase winding 5 or straight conductors of two different-phase single-phase windings 5. This ensures that the potential difference in the stator slot 11 exists at the contact surface of the straight conductors of the two-phase single-phase windings 5, thereby reducing the requirements for the insulation of the flat wire winding and reducing the processing cost.

[0043] Further, the welding end 2 includes: a first bent portion 21, which is distributed circumferentially along the stator core 1; a second bent portion 22, which is also distributed circumferentially along the stator core 1, wherein the first bent portion 21 and the second bent portion 22 have opposite inclination angles relative to the axis of the stator core 1; a connecting portion 23, which is provided at the end of the first bent portion 21 and the second bent portion 22 away from the stator core 1, wherein the length direction of the connecting portion 23 is parallel to the axis of the stator core 1; the connecting portion 23 provided in the first bent portion 21 is electrically connected to the connecting portion 23 provided in the second bent portion 22, and the span between the electrically connected first bent portion 21 and the second bent portion 22 is 9.

[0044] Specifically, one end of the first bend 21 is connected to a straight conductor, and the other end is connected to the connecting part 23. One end of the second bend 22 is connected to a straight conductor, and the other end is connected to the connecting part 23. In the same branch, the first bend 21 and the second bend 22 form a welded end 2 through the welded connecting part 23. The connected first bend 21 and the second bend 22 are distributed along the circumference of the stator core 1. In the same branch, the first bend 21 and the second bend 22 connected at each stage are located in adjacent stator slots 11. The first bend 21 and the second bend 22 are both inclined along the axis of the stator core 1, and their inclination angles are opposite, so that the straight conductors connected at both ends through the first bend 21 or the second bend 22 can span 8 stator slots 11, thereby improving the uniform distribution of current in the same branch and enhancing the superposition and weakening effect of higher harmonics.

[0045] Secondly, the first bend 21 and the second bend 22 with the same shape but different inclination angles, as well as the connecting part 23 with the same shape, make the span of the welding end 2 the same, thereby reducing the types of welding ends 2 and reducing the processing cost of the welding end 2.

[0046] like Figures 6 to 8 As shown, the single-phase winding 5 includes several windings located in stator slots 11: a first winding 504, a second winding 505, a third winding 506, a fourth winding 507, a fifth winding 508, a sixth winding 509, a seventh winding 510, an eighth winding 511, a ninth winding 512, a tenth winding 513, an eleventh winding 514, a twelfth winding 515, and a thirteenth winding 516. The main structure of the first winding 504 is an I-shaped structure. One end of the first winding 504 is provided with a first bend 21, and the end of the first winding 504 near the closed end 3 is connected to the lead. The main structure of the second hairpin 505 to the sixth hairpin 509 and the eighth hairpin 511 to the twelfth hairpin 515 is a U-shaped structure. The two ends of the second hairpin 505 to the sixth hairpin 509 and the eighth hairpin 511 to the twelfth hairpin 515 are respectively provided with a first bend 21 and a second bend 22 facing away from each other. The main structure of the seventh hairpin 510 and the thirteenth hairpin 516 is a U-shaped structure. The two ends of the seventh hairpin 510 and the thirteenth hairpin 516 are respectively provided with a second bend 22 in the same direction. The bottom of the U-shaped structure forms a closed end 3.

[0047] Specifically, each hairpin includes a linear conductor inserted into the stator slot 11.

[0048] Figure 6 As shown, one end of the first hairpin 504 is connected to the first bend 21 and then to the second bend 22 of other hairpins in the same branch. The other end of the first hairpin 504 is connected to the lead-out terminal 4 for connection to external circuits.

[0049] Figure 7 As shown, the seventh hairpin 510 and the thirteenth hairpin 516 are similar in shape, only differing in span, which makes the size of their closed ends 3 different. The main structure of the seventh hairpin 510 and the thirteenth hairpin 516 is the same, both being U-shaped structures with straight conductors on both sides. Their bottoms are connected by conductors to form closed ends 3, and their open ends are connected to the second bend 22, which enables the current in the branch to be reversed.

[0050] Figure 8As shown, the second hairpin 505, the third hairpin 506, the fourth hairpin 507, the fifth hairpin 508, the sixth hairpin 509, the eighth hairpin 511, the ninth hairpin 512, the tenth hairpin 513, the eleventh hairpin 514, and the twelfth hairpin 515 are similar in shape, only differing in the span of the straight conductors and the radial distance from the axis of the stator core 1, resulting in different bottom curvatures of their U-shaped structures and different dimensions of the closed end 3. Among them, the main structure of the second hairpin 505, the third hairpin 506, the fourth hairpin 507, the fifth hairpin 508, the sixth hairpin 509, the eighth hairpin 511, the ninth hairpin 512, the tenth hairpin 513, the eleventh hairpin 514, and the twelfth hairpin 515 is a U-shaped structure, with straight conductors on both sides of the U-shaped structure. The bottom is connected by conductors to form a closed end 3, and the open ends of the U-shaped structure are connected to the opposite first bend 21 and the second bend 22, realizing unidirectional current flow.

[0051] like Figure 3 As shown, the first branch 501 is formed by sequentially connecting the first hairpin 504, the second hairpin 505, the third hairpin 506, the fourth hairpin 507, the fifth hairpin 508, the sixth hairpin 509, the seventh hairpin 510, the eighth hairpin 511, the sixth hairpin 509, the ninth hairpin 512, the tenth hairpin 513, the fourth hairpin 507, the eleventh hairpin 514, the twelfth hairpin 515, the second hairpin 505, and the connecting part of the first hairpin 504.

[0052] Specifically, the area of ​​the stator slot 11 is divided into 6 layers radially according to the radial distance from the axis within the stator slot 11. The layers from the outside to the inside along the radial direction of the stator core 1 are the 6th layer, the 5th layer, the 4th layer, the 3rd layer, the 2nd layer, and the 1st layer. The span of the hairpin refers to the span of the straight conductor inserted into the stator slot 11.

[0053] The connection method for the first branch 501 is as follows:

[0054] The first hairpin 504 is inserted into the first layer of the stator slot 11. The first connecting part 23 of the first hairpin 504 is connected to the second connecting part 23 of the second hairpin 505 located in the second layer. The first connecting part 23 of the second hairpin 505 is located in the first layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the second hairpin 505 located in the second layer. The first connecting part 23 of the second hairpin 505 is located in the first layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the third hairpin 506 located in the second layer. The first connecting part 23 of the third hairpin 506 is located in the third layer of the stator slot 11 with a span of 10 and is connected to the second connecting part 23 of the fourth hairpin 507 located in the fourth layer. The first connecting part of the fourth hairpin 507... Part 23 is located at the third layer of stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the fourth hairpin 507 located at the fourth layer. The first connecting part 23 of the fourth hairpin 507 is located at the third layer of stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the fifth hairpin 508 located at the fourth layer. The first connecting part 23 of the fifth hairpin 508 is located at the fifth layer of stator slot 11 with a span of 10 and is connected to the second connecting part 23 of the sixth hairpin 509 located at the sixth layer. The first connecting part 23 of the sixth hairpin 509 is located at the fifth layer of stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the sixth hairpin 509 located at the sixth layer. The first connecting part 23 of the sixth hairpin 509 is located at the third layer of stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the sixth hairpin 509 located at the sixth layer. The seventh hairpin 510 is located on the 6th layer and connected to the second connecting part 23 of the seventh hairpin 510 on the 6th layer. The second connecting part 23 of the seventh hairpin 510 is located on the 6th layer of the stator slot 11 with a span of 11 and connected to the first connecting part 23 of the eighth hairpin 511 on the 5th layer. The second connecting part 23 of the eighth hairpin 511 is located on the 6th layer of the stator slot 11 with a span of 11 and connected to the first connecting part 23 of the sixth hairpin 509 on the 5th layer. The second connecting part 23 of the sixth hairpin 509 is located on the 6th layer of the stator slot 11 with a span of 8 and connected to the first connecting part 23 of the ninth hairpin 512 on the 5th layer. The second connecting part 23 of the ninth hairpin 512 is located on the 4th layer of the stator slot 11 with a span of 7 and connected to the tenth hairpin 513 on the 3rd layer. The first connecting part 23 of the layer is connected; the second connecting part 23 of the tenth hairpin 513 is located in the fourth layer of the stator slot 11 with a span of 11 and is connected to the first connecting part 23 of the fourth hairpin 507 located in the third layer; the second connecting part 23 of the fourth hairpin 507 is located in the fourth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the eleventh hairpin 514 located in the third layer; the second connecting part 23 of the eleventh hairpin 514 is located in the second layer of the stator slot 11 with a span of 7 and is connected to the first connecting part 23 of the twelfth hairpin 515 located in the first layer; the second connecting part 23 of the twelfth hairpin 515 is located in the second layer of the stator slot 11 with a span of 11 and is connected to the first connecting part 23 of the second hairpin 505 located in the first layer.The second connecting portion 23 of the second hairpin 505 is located at the second layer of the stator slot 11 with a span of 8, and is connected to the first connecting portion 23 of the first hairpin 504 located at the first layer.

[0055] like Figure 4 As shown, the second branch 502 is formed by sequentially connecting the first hairpin 504, the second hairpin 505, the twelfth hairpin 515, the eleventh hairpin 514, the fourth hairpin 507, the tenth hairpin 513, the ninth hairpin 512, the sixth hairpin 509, the eighth hairpin 511, the thirteenth hairpin 516, the sixth hairpin 509, the eighth hairpin 511, the ninth hairpin 512, the fourth hairpin 507, the tenth hairpin 513, the eleventh hairpin 514, the second hairpin 505, the twelfth hairpin 515, and the connecting part of the first hairpin 504.

[0056] Specifically, the area of ​​the stator slot 11 is divided into 6 layers radially according to the radial distance from the axis within the stator slot 11. The layers from the outside to the inside along the radial direction of the stator core 1 are the 6th layer, the 5th layer, the 4th layer, the 3rd layer, the 2nd layer, and the 1st layer. The span of the hairpin refers to the span of the straight conductor inserted into the stator slot 11.

[0057] The connection method for the second branch 502 is as follows:

[0058] The first hairpin 504 is inserted into the first layer of the stator slot 11. The first connecting part 23 of the first hairpin 504 is connected to the second connecting part 23 of the second hairpin 505 located in the second layer. The first connecting part 23 of the second hairpin 505 is located in the first layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the twelfth hairpin 515 located in the second layer. The first connecting part 23 of the twelfth hairpin 515 is located in the first layer of the stator slot 11 with a span of 11 and is connected to the second connecting part 23 of the eleventh hairpin 514 located in the second layer. The first connecting part 23 of the eleventh hairpin 514 is located in the third layer of the stator slot 11 with a span of 7 and is connected to the second connecting part 23 of the fourth hairpin 507 located in the fourth layer. The first connecting part 23 of the fourth hairpin 507 is connected to the second connecting part 23 of the fourth hairpin 507 located in the fourth layer. The connecting part 23 is located at the third layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the tenth hairpin 513 located at the fourth layer. The first connecting part 23 of the tenth hairpin 513 is located at the third layer of the stator slot 11 with a span of 11 and is connected to the second connecting part 23 of the ninth hairpin 512 located at the fourth layer. The first connecting part 23 of the ninth hairpin 512 is located at the fifth layer of the stator slot 11 with a span of 7 and is connected to the second connecting part 23 of the sixth hairpin 509 located at the sixth layer. The first connecting part 23 of the sixth hairpin 509 is located at the fifth layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the eighth hairpin 511 located at the sixth layer. The first connecting part 23 of the eighth hairpin 511 is located at the third layer of the stator slot 11 with a span of 11. The 5th layer is connected to the second connecting part 23 of the thirteenth hairpin 516 located on the 6th layer. The second connecting part 23 of the thirteenth hairpin 516 is located on the 6th layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the sixth hairpin 509 located on the 5th layer. The second connecting part 23 of the sixth hairpin 509 is located on the 6th layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the eighth hairpin 511 located on the 5th layer. The second connecting part 23 of the eighth hairpin 511 is located on the 6th layer of the stator slot 11 with a span of 11 and is connected to the first connecting part 23 of the ninth hairpin 512 located on the 5th layer. The second connecting part 23 of the ninth hairpin 512 is located on the 4th layer of the stator slot 11 with a span of 7 and is connected to the fourth hairpin 507 located on the 5th layer. The first connecting part 23 of the third layer is connected; the second connecting part 23 of the fourth hairpin 507 is located in the fourth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the tenth hairpin 513 located in the third layer; the second connecting part 23 of the tenth hairpin 513 is located in the fourth layer of the stator slot 11 with a span of 11 and is connected to the first connecting part 23 of the eleventh hairpin 514 located in the third layer; the second connecting part 23 of the eleventh hairpin 514 is located in the second layer of the stator slot 11 with a span of 7 and is connected to the first connecting part 23 of the second hairpin 505 located in the first layer; the second connecting part 23 of the second hairpin 505 is located in the second layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the twelfth hairpin 515 located in the first layer.The second connecting portion 23 of the twelfth hairpin 515 is located in the second layer of the stator slot 11 with a span 11, and is connected to the first connecting portion 23 of the first hairpin 504 located in the first layer.

[0059] like Figure 5 As shown, the third branch 503 is formed by sequentially connecting the first hairpin 504, the twelfth hairpin 515, the second hairpin 505, the eleventh hairpin 514, the tenth hairpin 513, the fourth hairpin 507, the ninth hairpin 512, the eighth hairpin 511, the sixth hairpin 509, the thirteenth hairpin 516, the sixth hairpin 509, the fifth hairpin 508, the fourth hairpin 507, the third hairpin 506, the second hairpin 505, and the connecting part of the first hairpin 504.

[0060] Specifically, the area of ​​the stator slot 11 is divided into 6 layers radially according to the radial distance from the axis within the stator slot 11. The layers from the outside to the inside along the radial direction of the stator core 1 are the 6th layer, the 5th layer, the 4th layer, the 3rd layer, the 2nd layer, and the 1st layer. The span of the hairpin refers to the span of the straight conductor inserted into the stator slot 11.

[0061] The connection method for the third branch 503 is as follows:

[0062] The first hairpin 504 is inserted into the first layer of the stator slot 11. The first connecting part 23 of the first hairpin 504 is connected to the second connecting part 23 of the twelfth hairpin 515 located in the second layer. The first connecting part 23 of the twelfth hairpin 515 is located in the first layer of the stator slot 11 with a span of 11 and is connected to the second connecting part 23 of the second hairpin 505 located in the second layer. The first connecting part 23 of the second hairpin 505 is located in the first layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the eleventh hairpin 514 located in the second layer. The first connecting part 23 of the eleventh hairpin 514 is located in the third layer of the stator slot 11 with a span of 7 and is connected to the second connecting part 23 of the tenth hairpin 513 located in the fourth layer. The tenth hairpin 513... The first connecting part 23 is located at the third layer of the stator slot 11 with a span of 11 and is connected to the second connecting part 23 of the fourth hairpin 507 located at the fourth layer. The first connecting part 23 of the fourth hairpin 507 is located at the third layer of the stator slot 11 with a span of 8 and is connected to the second connecting part 23 of the ninth hairpin 512 located at the fourth layer. The first connecting part 23 of the ninth hairpin 512 is located at the fifth layer of the stator slot 11 with a span of 7 and is connected to the second connecting part 23 of the eighth hairpin 511 located at the sixth layer. The first connecting part 23 of the eighth hairpin 511 is located at the fifth layer of the stator slot 11 with a span of 11 and is connected to the second connecting part 23 of the sixth hairpin 509 located at the sixth layer. The first connecting part 23 of the sixth hairpin 509 is located at the third layer of the stator slot 11 with a span of 8. The fifth layer of the stator slot 11 is connected to the second connecting part 23 of the thirteenth hairpin 516 located on the sixth layer. The second connecting part 23 of the thirteenth hairpin 516 is located on the sixth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the sixth hairpin 509 located on the fifth layer. The second connecting part 23 of the sixth hairpin 509 is located on the sixth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the sixth hairpin 509 located on the fifth layer. The second connecting part 23 of the sixth hairpin 509 is located on the sixth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the fifth hairpin 508 located on the fifth layer. The second connecting part 23 of the fifth hairpin 508 is located on the fourth layer of the stator slot 11 with a span of 10 and is connected to the fourth hairpin 508. 7. The first connecting part 23 located on the third layer is connected. The second connecting part 23 of the fourth hairpin 507 is located on the fourth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the fourth hairpin 507 located on the third layer. The second connecting part 23 of the fourth hairpin 507 is located on the fourth layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the third hairpin 506 located on the third layer. The second connecting part 23 of the third hairpin 506 is located on the second layer of the stator slot 11 with a span of 10 and is connected to the first connecting part 23 of the second hairpin 505 located on the first layer. The second connecting part 23 of the second hairpin 505 is located on the second layer of the stator slot 11 with a span of 8 and is connected to the first connecting part 23 of the second hairpin 505 located on the first layer.The second connecting portion 23 of the second hairpin 505 is located at the second layer of the stator slot 11 with a span of 8, and is connected to the first connecting portion 23 of the first hairpin 504 located at the first layer.

[0063] like Figure 9 This is an unfolded diagram of a three-phase winding, where numbers 1-54 indicate that the three-phase winding is installed in 54 winding slots. In addition, A1+, A2+, A3+, B1+, B2+, B3+, C1+, C2+, and C3+ in the diagram represent the lead-out terminals 4 of each branch of the three-phase winding, and A1-, A2-, A3-, B1-, B2-, B3-, C1-, C2-, and C3- represent the neutral terminals of each branch of the three-phase winding.

[0064] Example 2

[0065] This embodiment is a motor stator, which includes: a stator core 1, the inner wall of which is evenly distributed with stator slots 11, the stator core 1 also includes insulating paper 12 disposed inside the stator slots 11; and a 6-level 54-slot flat wire winding as in Embodiment 1 that cooperates with the stator slots 11.

[0066] Specifically, the stator core 1 is made of a certain number of stacked silicon steel sheets, which can be formed by riveting, welding, or bonding. Considering insulation, insulating paper 12 of a certain thickness is inserted into the stator slots 11. There are 54 stator slots 11, and straight conductors with hairpins are inserted into each of the 54 slots 11. Six hairpins can be inserted into each slot. To achieve electrical connection between the conductors in the 54 stator slots 11, methods such as hairpins or welding are required.

[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0068] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A 6-level 54-slot flat wire winding, the flat wire winding being used to cooperate with stator slots (11), the stator slots (11) being formed on the inner wall of a stator core (1), characterized in that, The flat wire winding includes a three-phase winding, and the three-phase winding includes a single-phase winding (5); The number of slots per phase per stage of the three-phase winding is q = 5; The single-phase windings (5) are arranged in the stator slots (11) at equal intervals along the circumference. The proportion of the single-phase windings (5) concentrated in the stator slots (11) in each magnetic pole increases to 100% and then decreases. The starting position of the single-phase windings (5) in each magnetic pole is located at the bottom or opening of the stator slot (11).

2. The 6-level 54-slot flat wire winding according to claim 1, characterized in that: The welding end (2) and the closed end (3) of the same branch are located at both ends of the stator core (1). The welding end (2) of the same branch is placed in adjacent stator slots (11) in sequence and the distance from the axis of the stator core (1) increases or decreases. The welding ends (2) of the first branch (501), the third branch (503) and the second branch (502) at the same distance from the axis of the stator core (1) are located in adjacent stator slots (11) in sequence. The projection of the welding end (2) of the first branch (501) of each magnetic pole is located clockwise in sequence at the bottom, middle and top of the adjacent stator slot (11), and the projection of the welding end (2) of the second branch (502) and the third branch (503) is located counterclockwise in sequence in the stator slot (11) adjacent to the first branch (501).

3. The 6-level 54-slot flat wire winding according to claim 2, characterized in that: There is at least one single-phase winding (5) and at most two single-phase windings (5) in the same stator slot (11).

4. The 6-level 54-slot flat wire winding according to claim 3, characterized in that: The welding end (2) includes: The first bend (21) is distributed along the circumference of the stator core (1); The second bend (22) is distributed along the circumference of the stator core (1), and the first bend (21) and the second bend (22) have opposite inclination angles relative to the axis of the stator core (1). Both the first bending portion (21) and the second bending portion (22) are provided at the end away from the stator core (1), and the length direction of the connecting portion (23) is parallel to the axis of the stator core (1); The connecting portions (23) provided in the first bending portion (21) are all electrically connected to the connecting portions (23) provided in the second bending portion (22), and the span between the electrically connected first bending portion (21) and second bending portion (22) is 9.

5. The 6-level 54-slot flat wire winding according to claim 4, characterized in that: The single-phase winding (5) includes a plurality of first windings (504), second windings (505), third windings (506), fourth windings (507), fifth windings (508), sixth windings (509), seventh windings (510), eighth windings (511), ninth windings (512), tenth windings (513), eleventh windings (514), twelfth windings (515) and thirteenth windings (516) located in the stator slots (11); The main structure of the first hairpin (504) is an I-shaped structure. One end of the first hairpin (504) is provided with the first bending part (21). The end of the first hairpin (504) near the closed end (3) is connected to the lead-out end (4). The main structure of the second hairpin (505) to the sixth hairpin (509) and the eighth hairpin (511) to the twelfth hairpin (515) are all U-shaped structures. The two ends of the second hairpin (505) to the sixth hairpin (509) and the eighth hairpin (511) to the twelfth hairpin (515) are respectively provided with a first bent part (21) and a second bent part (22) facing away from each other. The main structure of the seventh hairpin (510) and the thirteenth hairpin (516) is a U-shaped structure, and the two ends of the seventh hairpin (510) and the thirteenth hairpin (516) are respectively provided with a second bend (22) in the same direction; The bottom of the U-shaped structure forms the closed end (3).

6. The 6-level 54-slot flat wire winding according to claim 5, characterized in that: The first branch (501) is formed by connecting the first hairpin (504), the second hairpin (505), the third hairpin (506), the fourth hairpin (507), the fifth hairpin (508), the sixth hairpin (509), the seventh hairpin (510), the eighth hairpin (511), the sixth hairpin (509), the ninth hairpin (512), the tenth hairpin (513), the fourth hairpin (507), the eleventh hairpin (514), the twelfth hairpin (515), the second hairpin (505), and the first hairpin (504) in sequence (23).

7. The 6-level 54-slot flat wire winding according to claim 5, characterized in that: The second branch (502) is formed by connecting the first hairpin (504), the second hairpin (505), the twelfth hairpin (515), the eleventh hairpin (514), the fourth hairpin (507), the tenth hairpin (513), the ninth hairpin (512), the sixth hairpin (509), the eighth hairpin (511), the thirteenth hairpin (516), the sixth hairpin (509), the eighth hairpin (511), the ninth hairpin (512), the fourth hairpin (507), the tenth hairpin (513), the eleventh hairpin (514), the second hairpin (505), the twelfth hairpin (515), and the first hairpin (504) in sequence (23).

8. The 6-level 54-slot flat wire winding according to claim 5, characterized in that: The third branch (503) is formed by connecting the first hairpin (504), the twelfth hairpin (515), the second hairpin (505), the eleventh hairpin (514), the tenth hairpin (513), the fourth hairpin (507), the ninth hairpin (512), the eighth hairpin (511), the sixth hairpin (509), the thirteenth hairpin (516), the sixth hairpin (509), the fifth hairpin (508), the fourth hairpin (507), the third hairpin (506), the second hairpin (505), the second hairpin (505), and the first hairpin (504) in sequence (23).

9. A motor stator, characterized in that, include: Stator core (1), stator slots (11) are evenly distributed on the inner wall of the stator core (1), and the stator core (1) also includes insulating paper (12) disposed inside the stator slots (11); The 6-level 54-slot flat wire winding as described in any one of claims 1 to 8, which cooperates with the stator slot (11).

10. A flat wire motor, characterized in that, Includes the motor stator as described in claim 9.

Images