Stator assembly with multi-branch flat wire winding

Abstract

The utility model relates to a stator assembly with a multi-branch flat wire winding, which comprises a stator core and a stator winding, 54 stator slots are arranged on the stator core, and M wiring layers are arranged in each stator slot; the stator winding comprises a coil; each phase of the stator winding comprises at least two branches, each branch comprises a plurality of pole winding units, each pole winding unit is sequentially wound from the first wiring layer to the Mth wiring layer and then is sequentially wound from the Mth wiring layer to the first wiring layer, and the starting end or the tail end of each pole winding unit overlines to the adjacent pole winding unit; when each phase comprises three branches, the coil of the first wiring layer or the Mth wiring layer crosses one wiring layer, and the sum of spans is 27 stator slots. Compared with the prior art, the utility model has the advantages that the three-phase symmetrical circulation-free winding arrangement can be realized; and fifth, seventh, eleventh and thirteenth harmonic waves can be weakened, so that the NVH vibration noise problem of the motor is improved, and the adverse effect caused by the flat wire technology is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of motor stator assembly design, especially a kind of stator assembly with multiple branch flat wire winding. BACKGROUND

[0002] The wire form used by the stator winding of flat wire motor is changed from traditional multiple thin round wires to thick rectangular wires, i.e. flat wires. The stator assembly of flat wire motor usually includes a stator core and a multi-phase flat wire winding. The stator core serves as the support structure of the motor, and has multiple stator slots inside for accommodating the flat wire winding.

[0003] The arrangement of flat wire winding is a key part in motor design, which has achieved higher current carrying capacity and better heat dissipation performance. In the prior art, the unreasonable branch arrangement causes different welding end spans, which further leads to difficult welding end head twisting.

[0004] In summary, how to design a stator assembly with convenient welding end head welding is a technical problem to be solved. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the defects of the prior art and provides a stator assembly with multiple branch flat wire windings.

[0006] The utility model can be realized by the following technical solutions:

[0007] According to one aspect of the utility model, a stator assembly with multiple branch flat wire windings is provided, which includes a stator core and a stator winding. The stator core is provided with 54 stator slots. Each stator slot has M layers of wiring layers, where M≥2. The stator winding includes multiple coils, and the coils are inserted into all wiring layers of the stator slots. The stator winding includes three phases, each phase includes at least two branches, each branch includes multiple pole winding units, each pole winding unit is wound from the first layer of wiring layers to the Mth layer of wiring layers, and then from the Mth layer of wiring layers to the first layer of wiring layers, and the beginning or end of each pole winding unit is connected to the adjacent pole winding unit. When each phase includes three branches, the coils in the first layer or the Mth layer of wiring layers span one layer of wiring layers, and the total span is 27 stator slots.

[0008] As a preferred technical solution, each phase of the stator winding includes a first part and a second part. The first part includes a layer of wiring layers, and the second part includes b layers of wiring layers, where a+b=M.

[0009] As a preferred technical solution, the first part and the second part are staggered by at least one stator slot in the clockwise or counterclockwise direction along the circumference.

[0010] As a preferred technical scheme, the coil crossing two wiring layers is connected between the first part and the second part, and the span of the coil is greater than or less than t stator slots, t = 54 / P, P is the pole number of the rotor matched with the stator assembly.

[0011] As a preferred technical scheme, when the span of the coil crossing two wiring layers is greater than t stator slots, the coil crossing one wiring layer in the first wiring layer or the Mth wiring layer at least includes a coil with a span less than t stator slots.

[0012] As a preferred technical scheme, the coil crossing two wiring layers is connected between the first part and the second part, and the span of the coil is greater than or less than t stator slots, t = 54 / P, P is the pole number of the rotor matched with the stator assembly.

[0013] As a preferred technical scheme, the coil crossing two wiring layers is connected between the first part and the second part, and the span of the coil is greater than or less than t stator slots, t = 54 / P, P is the pole number of the rotor matched with the stator assembly.

[0014] As a preferred technical scheme, the coil crossing two wiring layers is connected between the first part and the second part, and the span of the coil is greater than or less than t stator slots, t = 54 / P, P is the pole number of the rotor matched with the stator assembly.

[0015] As a preferred technical scheme, the coil crossing two wiring layers is connected between the first part and the second part, and the span of the coil is greater than or less than t stator slots, t = 54 / P, P is the pole number of the rotor matched with the stator assembly.

[0016] As a preferred technical scheme, the coil crossing two wiring layers is connected between the first part and the second part, and the span of the coil is greater than or less than t stator slots, t = 54 / P, P is the pole number of the rotor matched with the stator assembly.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The utility model provides a multi-branch flat wire winding arrangement mode of 54-slot motor, can realize three-phase symmetrical no -circulation winding arrangement, can weaken 5, 7, 11, 13 times harmonic, to improve the NVH vibration noise problem of motor, under the cost and performance consideration based on batch production, the bad influence brought by using flat wire technology is reduced to the maximum extent.

[0019] 2) The utility model reduces the coil type, reduces the end height, improves the efficiency of motor. DRAWINGS

[0020] Figure 1 It is three-phase winding arrangement drawing of the utility model embodiment 1;

[0021] Figure 2 for the embodiment 2 of the utility model three phase winding arrangement drawing;

[0022] Figure 3 for the embodiment 3 of the utility model three phase winding arrangement drawing;

[0023] Figure 4 for the embodiment 4 of the utility model three phase winding arrangement drawing;

[0024] Figure 5 for the embodiment 5 of the utility model three phase winding arrangement drawing;

[0025] Figure 6 for the embodiment 6 of the utility model three phase winding arrangement drawing;

[0026] Figure 7 for the embodiment 7 of the utility model three phase winding arrangement drawing;

[0027] Figure 8 for the embodiment 8 of the utility model three phase winding arrangement drawing. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work should belong to the protection scope of the utility model.

[0029] The utility model provides a kind of stator assembly with multiple branch flat wire winding, to reach in the acceptable range of motor performance change, reduce flat wire winding line type quantity and reduce end height.The stator assembly includes stator core and stator winding, and 54 stator slots are provided on the stator core, and there are M layers wiring layers in each stator slot, wherein M is greater than or equal to 2;Stator winding includes multiple coils, and coils are inserted in all wiring layers of stator slot;Stator winding includes three phases, and each phase includes at least two branches, and each branch includes multiple pole winding units, and multiple coils of each pole winding unit are connected in series using lap winding winding, and adjacent pole winding units are connected by same layer across.The whole distance is t stator slots, t=54 / P, P is the pole number of the rotor matched with the stator assembly;Short distance is cross distance less than t stator slots;Long distance is cross distance greater than t stator slots.

[0030] The first connection method for pole winding units is as follows: each pole winding is first connected in series from layer 1 to layer M, then through layer M to the adjacent pole, then in series from layer M to layer 1, and finally through layer 1 to the adjacent pole, forming a unit winding connection. The second connection method is as follows: each pole winding is first connected through layer 1 to the adjacent pole, then in series from layer 1 to layer M, then through layer M to the adjacent pole, and finally in series from layer M to layer 1, forming a unit winding connection. For each pole winding unit, in the outermost or innermost layer, with 3 branches, the total span of the 3 same-layer crossover coils in the outermost or innermost layer is equal to 27; in the 2-branch layer, the total span is not limited. The span of the outermost or innermost same-layer crossover coils can be all whole pitch or a mixture of long and short pitches.

[0031] The first wiring method for the stator winding is as follows: Each phase of the stator winding includes a first part and a second part. The first part has 'a' layers in the stator slot, and the second part has 'b' layers in the stator slot, where a + b = M. In each phase, the flat wire winding structure within each pole has a stator slot where the first part is wound and a stator slot where the second part is wound, stably offset by at least one slot circumferentially to achieve a short-pitch effect. The first part and the second part are connected by long-pitch, different-layer cross-coil connections. The outermost or innermost same-layer cross-coil includes at least one short-pitch coil. Alternatively, the first part and the second part can be connected by short-pitch, different-layer cross-coil layer-cross-coil connections. From layer 1 to layer M, each pole winding unit, except for short-pitch, different-layer cross-coil and same-layer cross-coil connections or long-pitch, different-layer cross-coil and same-layer cross-coil connections, uses full-pitch coil connections, and the span of the coil's welded ends is a full pitch.

[0032] The second wiring method for the stator winding is as follows: In each pole winding unit, from layer 1 to layer M, except for the same-layer spans, the remaining connections are made using short-pitch, cross-layer coils. The span at the soldered ends of the coils is also short-pitch, and the span at the soldered ends is equal to the span at the hairpin ends.

[0033] Example 1

[0034] like Figure 1 As shown, this embodiment provides a stator assembly with multiple branch flat wire windings. The stator assembly includes a stator core and stator windings. The stator core has 54 stator slots, and each stator slot has a total of 6 wiring layers. The stator windings include multiple coils, and coils are inserted in all wiring layers of the stator slots. The stator windings include three phases: U, V, and W, which are arranged by rotating one phase in each of the two directions by 120° electrical angles. Each phase includes two branches.

[0035] As shown in Table 1, the bottom layer of the slot is the first wiring layer, solid lines represent soldering ends, and dashed lines represent hairpin ends. The arrangement of the two branches of the U-phase winding in the stator slot is explained. The specific wiring method of the first branch U1 of the U-phase is as follows:

[0036] 2 slot 6 layer - 47 slot 5 layer - 3 slot 4 layer - 48 slot 3 layer - 3 slot 2 layer - 48 slot 1 layer - 2 slot 1 layer - 11 slot 2 layer - 2 slot 3 layer - 11 slot 4 layer - 1 slot 5 layer - 10 slot 6 layer - 18 slot 6 layer - 9 slot 5 layer - 19 slot 4 layer - 10 slot 3 layer - 19 slot 2 layer - 10 slot 1 layer - 19 slot 1 layer - 28 slot 2 layer - 19 slot 3 layer - 28 slot 4 layer - 18 slot 5 layer - 27 slot 6 layer - 36 slot 6 layer - 27 slot 5 layer - 37 slot 4 layer - 28 slot 3 layer - 37 slot 2 layer - 28 slot 1 layer - 38 slot 1 layer - 47 slot 2 layer - 38 slot 3 layer - 47 slot 4 layer - 37 slot 5 layer - 46 slot 6 layer - 38 slot 6 layer - 29 slot 5 layer - 39 slot 4 layer - 30 slot 3 layer - 39 slot 2 layer - 30 slot 1 layer - 20 slot 1 layer - 29 slot 2 layer - 20 slot 3 layer - 29 slot 4 layer - 19 slot 5 layer - 28 slot 6 layer - 20 slot 6 layer - 11 slot 5 layer - 21 slot 4 layer - 12 slot 3 layer - 21 slot 2 layer - 12 slot 1 layer.

[0037] Similarly, the specific wiring mode of the U-phase second branch U2 is as follows:

[0038] 3 slot 1 layer - 12 slot 2 layer - 3 slot 3 layer - 12 slot 4 layer - 2 slot 5 layer - 11 slot 6 layer - 19 slot 6 layer - 10 slot 5 layer - 20 slot 4 layer - 11 slot 3 layer - 20 slot 2 layer - 11 slot 1 layer - 21 slot 1 layer - 30 slot 2 layer - 21 slot 3 layer - 30 slot 4 layer - 20 slot 5 layer - 29 slot 6 layer - 37 slot 6 layer - 28 slot 5 layer - 38 slot 4 layer - 29 slot 3 layer - 38 slot 2 layer - 29 slot 1 layer - 37 slot 1 layer - 46 slot 2 layer - 37 slot 3 layer - 46 slot 4 layer - 36 slot 5 layer - 45 slot 6 layer - 54 slot 6 layer - 45 slot 5 layer - 1 slot 4 layer - 46 slot 3 layer - 1 slot 2 layer - 46 slot 1 layer - 1 slot 1 layer - 10 slot 2 layer - 1 slot 3 layer - 10 slot 4 layer - 54 slot 5 layer - 9 slot 6 layer - 1 slot 6 layer - 46 slot 5 layer - 2 slot 4 layer - 47 slot 3 layer - 2 slot 2 layer - 47 slot 1 layer - 39 slot 1 layer - 48 slot 2 layer - 39 slot 3 layer - 48 slot 4 layer - 38 slot 5 layer - 47 slot 6 layer.

[0039] Table 1 Example 1 U-phase 2-branch wiring table

[0040]

[0041] Example 2

[0042] As Figure 2 shown, the present embodiment provides a stator assembly with a multi-branch flat wire winding, which comprises a stator core and a stator winding, the stator core is provided with 54 stator slots, and there are 6 wiring layers in each stator slot; the stator winding comprises a plurality of coils, and the coils are inserted into all the wiring layers of the stator slots; the stator winding comprises U, V and W three phases, each phase is arranged in two directions with a rotation angle of 120° electrical, and each phase comprises two branches.

[0043] As shown in Table 2, the slot bottom layer is the first layer of wiring layer, the solid line is the welding end, and the dashed line is the hairpin end. The arrangement of the two branches of the U-phase winding in the stator slot is described as follows:

[0044] 4th slot 6th layer—49th slot 5th layer—3rd slot 4th layer—48th slot 3rd layer—3rd slot 2nd layer—48th slot 1st layer—2nd slot 1st layer—11th slot 2nd layer—2nd slot 3rd layer—11th slot 4th layer—3rd slot 5th layer—12th slot 6th layer—20th slot 6th layer—11th slot 5th layer—19th slot 4th layer—10th slot 3rd layer—19th slot 2nd layer—10th slot 1st layer—19th slot 1st layer—28th slot 2nd layer—19th slot 3rd layer—28th slot 4th layer—20th slot 5th layer—29th slot 6th layer—38th slot 6th layer—29th slot 5th layer—37th slot 4th layer—28th slot 3rd layer—37th slot 2nd layer—28th slot 1st layer—38th slot 1st layer—47th slot 2nd layer—38th slot 3rd layer—47th slot 4th layer—39th slot 5th layer—48th slot 6th layer—39th slot 6th layer—30th slot 5th layer—38th slot 4th layer—29th slot 3rd layer—38th slot 2nd layer—29th slot 1st layer—20th slot 1st layer—29th slot 2nd layer—20th slot 3rd layer—29th slot 4th layer—21st slot 5th layer—30th slot 6th layer—22nd slot 6th layer—13th slot 5th layer—21st slot 4th layer—12th slot 3rd layer—21st slot 2nd layer—12th slot 1st layer.

[0045] Similarly, the specific wiring mode of the second branch U2 of the U-phase is as follows:

[0046] 3rd slot 1st layer—12th slot 2nd layer—3rd slot 3rd layer—12th slot 4th layer—4th slot 5th layer—13th slot 6th layer—21st slot 6th layer—12th slot 5th layer—20th slot 4th layer—11th slot 3rd layer—20th slot 2nd layer—11th slot 1st layer—21st slot 1st layer—30th slot 2nd layer—21st slot 3rd layer—30th slot 4th layer—22nd slot 5th layer—31st slot 6th layer—40th slot 6th layer—31st slot 5th layer—39th slot 4th layer—30th slot 3rd layer—39th slot 2nd layer—30th slot 1st layer—39th slot 1st layer—48th slot 2nd layer—39th slot 3rd layer—48th slot 4th layer—40th slot 5th layer—49th slot 6th layer—2nd slot 6th layer—47th slot 5th layer—1st slot 4th layer—46th slot 3rd layer—1st slot 2nd layer—46th slot 1st layer—1st slot 1st layer—10th slot 2nd layer—1st slot 3rd layer—10th slot 4th layer—2nd slot 5th layer—11th slot 6th layer—3rd slot 6th layer—48th slot 5th layer—2nd slot 4th layer—47th slot 3rd layer—2nd slot 2nd layer—47th slot 1st layer—37th slot 1st layer—46th slot 2nd layer—37th slot 3rd layer—46th slot 4th layer—38th slot 5th layer—47th slot 6th layer.

[0047] Table 2 Wiring table of U-phase 2 branches of Example 2

[0048]

[0049] Example 3

[0050] As Figure 3As shown, the embodiment provides a stator assembly with a multi-branch flat wire winding, which comprises a stator core and a stator winding, the stator core is provided with 54 stator slots, and there are 6 wiring layers in each stator slot; the stator winding comprises a plurality of coils, and the coils are arranged in all wiring layers of the stator slots; the stator winding comprises U, V and W three phases, and each phase comprises three branches.

[0051] As shown in Table 3, the bottom layer of the slot is the first wiring layer, the solid line is the welding end, and the dashed line is the hairpin end. The arrangement of the two branches of the U-phase winding in the stator slot is described as follows:

[0052] 1 slot 1 layer - 10 slot 2 layer - 1 slot 3 layer - 10 slot 4 layer - 2 slot 5 layer - 11 slot 6 layer - 19 slot 6 layer - 10 slot 5 layer - 18 slot 4 layer - 9 slot 3 layer - 18 slot 2 layer - 9 slot 1 layer - 20 slot 1 layer - 29 slot 2 layer - 20 slot 3 layer - 29 slot 4 layer - 21 slot 5 layer - 30 slot 6 layer - 38 slot 6 layer - 29 slot 5 layer - 37 slot 4 layer - 28 slot 3 layer - 37 slot 2 layer - 28 slot 1 layer - 36 slot 1 layer - 45 slot 2 layer - 36 slot 3 layer - 45 slot 4 layer - 37 slot 5 layer - 46 slot 6 layer - 3 slot 6 layer - 48 slot 5 layer - 2 slot 4 layer - 47 slot 3 layer - 2 slot 2 layer - 47 slot 1 layer.

[0053] Similarly, the specific wiring mode of the second branch U2 of the U-phase is as follows:

[0054] 2 slot 1 layer - 11 slot 2 layer - 2 slot 3 layer - 11 slot 4 layer - 3 slot 5 layer - 12 slot 6 layer - 20 slot 6 layer - 11 slot 5 layer - 19 slot 4 layer - 10 slot 3 layer - 19 slot 2 layer - 10 slot 1 layer - 18 slot 1 layer - 27 slot 2 layer - 18 slot 3 layer - 27 slot 4 layer - 19 slot 5 layer - 28 slot 6 layer - 39 slot 6 layer - 30 slot 5 layer - 38 slot 4 layer - 29 slot 3 layer - 38 slot 2 layer - 29 slot 1 layer - 37 slot 1 layer - 46 slot 2 layer - 37 slot 3 layer - 46 slot 4 layer - 38 slot 5 layer - 47 slot 6 layer - 1 slot 6 layer - 46 slot 5 layer - 54 slot 4 layer - 45 slot 3 layer - 54 slot 2 layer - 45 slot 1 layer.

[0055] Similarly, the specific wiring mode of the third branch U3 of the U-phase is as follows:

[0056] 54th slot 1 layer-9th slot 2 layer-54th slot 3 layer-9th slot 4 layer-1st slot 5 layer-10th slot 6 layer-21st slot 6 layer-12th slot 5 layer-20th slot 4 layer-11th slot 3 layer-20th slot 2 layer-11th slot 1 layer-19th slot 1 layer-28th slot 2 layer-19th slot 3 layer-28th slot 4 layer-20th slot 5 layer-29th slot 6 layer-37th slot 6 layer-28th slot 5 layer-36th slot 4 layer-27th slot 3 layer-36th slot 2 layer-27th slot 1 layer-38th slot 1 layer-47th slot 2 layer-38th slot 3 layer-47th slot 4 layer-39th slot 5 layer-48th slot 6 layer-2nd slot 6 layer-47th slot 5 layer-1st slot 4 layer-46th slot 3 layer-1st slot 2 layer-46th slot 1 layer.

[0057] Table 3 U-phase 3-branch wiring table of Example 3

[0058]

[0059] Example 4

[0060] As Figure 4 shown in the table 4, taking the slot bottom layer as the first wiring layer, the solid line as the welding end and the dotted line as the hairpin end, the arrangement of the two branches of the U-phase winding in the stator slot is described as follows: the specific wiring mode of the first branch U1 of the U-phase is as follows:

[0061] As shown in the table 4, taking the slot bottom layer as the first wiring layer, the solid line as the welding end and the dotted line as the hairpin end, the arrangement of the two branches of the U-phase winding in the stator slot is described as follows: the specific wiring mode of the first branch U1 of the U-phase is as follows:

[0062] 49th slot 5 layer-3rd slot 4 layer-48th slot 3 layer-3rd slot 2 layer-48th slot 1 layer-2nd slot 1 layer-11th slot 2 layer-2nd slot 3 layer-11th slot 4 layer-3rd slot 5 layer-12th slot 6 layer-20th slot 6 layer-11th slot 5 layer-19th slot 4 layer-10th slot 3 layer-19th slot 2 layer-10th slot 1 layer-19th slot 1 layer-28th slot 2 layer-19th slot 3 layer-28th slot 4 layer-20th slot 5 layer-29th slot 6 layer-38th slot 6 layer-29th slot 5 layer-37th slot 4 layer-28th slot 3 layer-37th slot 2 layer-28th slot 1 layer-38th slot 1 layer-47th slot 2 layer-38th slot 3 layer-47th slot 4 layer-39th slot 5 layer-48th slot 6 layer-39th slot 6 layer-30th slot 5 layer-38th slot 4 layer-29th slot 3 layer-38th slot 2 layer-29th slot 1 layer-20th slot 1 layer-29th slot 2 layer-20th slot 3 layer-29th slot 4 layer-21st slot 5 layer-30th slot 6 layer-22nd slot 6 layer-13th slot 5 layer-21st slot 4 layer-12th slot 3 layer-21st slot 2 layer-12th slot 1 layer-3rd slot 1 layer.

[0063] Similarly, the specific wiring mode of the second branch U2 of the U-phase is as follows:

[0064] 12 slot 2 layer - 3 slot 3 layer - 12 slot 4 layer - 4 slot 5 layer - 13 slot 6 layer - 21 slot 6 layer - 12 slot 5 layer - 20 slot 4 layer - 11 slot 3 layer - 20 slot 2 layer - 11 slot 1 layer - 21 slot 1 layer - 30 slot 2 layer - 21 slot 3 layer - 30 slot 4 layer - 22 slot 5 layer - 31 slot 6 layer - 40 slot 6 layer - 31 slot 5 layer - 39 slot 4 layer - 30 slot 3 layer - 39 slot 2 layer - 30 slot 1 layer - 39 slot 1 layer - 48 slot 2 layer - 39 slot 3 layer - 48 slot 4 layer - 40 slot 5 layer - 49 slot 6 layer - 2 slot 6 layer - 47 slot 5 layer - 1 slot 4 layer - 46 slot 3 layer - 1 slot 2 layer - 46 slot 1 layer - 1 slot 1 layer - 10 slot 2 layer - 1 slot 3 layer - 10 slot 4 layer - 2 slot 5 layer - 11 slot 6 layer - 3 slot 6 layer - 48 slot 5 layer - 2 slot 4 layer - 47 slot 3 layer - 2 slot 2 layer - 47 slot 1 layer - 37 slot 1 layer - 46 slot 2 layer - 37 slot 3 layer - 46 slot 4 layer - 38 slot 5 layer - 47 slot 6 layer - 4 slot 6 layer.

[0065] Table 4 U phase 2 branch wiring table of example 4

[0066]

[0067] Example 5

[0068] As Figure 5 shown in the figure, the embodiment provides a stator assembly with a multi-branch flat wire winding, which comprises a stator core and a stator winding, the stator core is provided with 54 stator slots, and there are 6 wiring layers in each stator slot; the stator winding comprises a plurality of coils, and the coils are arranged in all wiring layers of the stator slots; the stator winding comprises U, V and W three phases, each phase is arranged in two directions with an electrical angle of 120°, and each phase comprises three branches.

[0069] As shown in Table 5, the bottom layer of the slot is the first layer of wiring layer, the solid line is the welding end, and the dashed line is the hairpin end. The arrangement of the two branches of the U phase winding in the stator slot is described as follows:

[0070] 47 slot 1 layer - 1 slot 1 layer - 10 slot 2 layer - 1 slot 3 layer - 10 slot 4 layer - 2 slot 5 layer - 11 slot 6 layer - 19 slot 6 layer - 10 slot 5 layer - 18 slot 4 layer - 9 slot 3 layer - 18 slot 2 layer - 9 slot 1 layer - 20 slot 1 layer - 29 slot 2 layer - 20 slot 3 layer - 29 slot 4 layer - 21 slot 5 layer - 30 slot 6 layer - 38 slot 6 layer - 29 slot 5 layer - 37 slot 4 layer - 28 slot 3 layer - 37 slot 2 layer - 28 slot 1 layer - 36 slot 1 layer - 45 slot 2 layer - 36 slot 3 layer - 45 slot 4 layer - 37 slot 5 layer - 46 slot 6 layer - 3 slot 6 layer - 48 slot 5 layer - 2 slot 4 layer - 47 slot 3 layer - 2 slot 2 layer.

[0071] Similarly, the specific wiring mode of the U-phase second branch U2 is as follows:

[0072] 45 Slot 1 Layer-2 Slot 1 Layer-11 Slot 2 Layer-2 Slot 3 Layer-11 Slot 4 Layer-3 Slot 5 Layer-12 Slot 6 Layer-20 Slot 6 Layer-11 Slot 5 Layer-19 Slot 4 Layer-10 Slot 3 Layer-19 Slot 2 Layer-10 Slot 1 Layer-18 Slot 1 Layer-27 Slot 2 Layer-18 Slot 3 Layer-27 Slot 4 Layer-19 Slot 5 Layer-28 Slot 6 Layer-39 Slot 6 Layer-30 Slot 5 Layer-38 Slot 4 Layer-29 Slot 3 Layer-38 Slot 2 Layer-29 Slot 1 Layer-37 Slot 1 Layer-46 Slot 2 Layer-37 Slot 3 Layer-46 Slot 4 Layer-38 Slot 5 Layer-47 Slot 6 Layer-1 Slot 6 Layer-46 Slot 5 Layer-54 Slot 4 Layer-45 Slot 3 Layer-54 Slot 2 Layer.

[0073] Similarly, the specific wiring mode of the U-phase third branch U3 is as follows:

[0074] 46 Slot 1 Layer-54 Slot 1 Layer-9 Slot 2 Layer-54 Slot 3 Layer-9 Slot 4 Layer-1 Slot 5 Layer-10 Slot 6 Layer-21 Slot 6 Layer-12 Slot 5 Layer-20 Slot 4 Layer-11 Slot 3 Layer-20 Slot 2 Layer-11 Slot 1 Layer-19 Slot 1 Layer-28 Slot 2 Layer-19 Slot 3 Layer-28 Slot 4 Layer-20 Slot 5 Layer-29 Slot 6 Layer-37 Slot 6 Layer-28 Slot 5 Layer-36 Slot 4 Layer-27 Slot 3 Layer-36 Slot 2 Layer-27 Slot 1 Layer-38 Slot 1 Layer-47 Slot 2 Layer-38 Slot 3 Layer-47 Slot 4 Layer-39 Slot 5 Layer-48 Slot 6 Layer-2 Slot 6 Layer-47 Slot 5 Layer-1 Slot 4 Layer-46 Slot 3 Layer-1 Slot 2 Layer.

[0075] Table 5 U-phase 3-branch wiring table of Example 5

[0076]

[0077] Example 6

[0078] As Figure 6 shown, the present embodiment provides a stator assembly with a multi-branch flat wire winding, which comprises a stator core and a stator winding, the stator core is provided with 54 stator slots, and there are 6 wiring layers in each stator slot; the stator winding comprises a plurality of coils, and the coils are inserted into all the wiring layers of the stator slots; the stator winding comprises U, V and W three phases, each phase is arranged in two directions with a rotation angle of 120° electrical, and each phase comprises two branches.

[0079] As shown in Table 4, the bottom layer of the slot is the first layer of wiring layer, the solid line is the welding end, and the dashed line is the hairpin end. The arrangement of the two branches of the U-phase winding in the stator slot is described as follows: the specific wiring mode of the U-phase first branch U1 is as follows:

[0080] 2 slot 1 layer - 10 slot 2 layer - 2 slot 3 layer - 10 slot 4 layer - 2 slot 5 layer - 10 slot 6 layer - 19 slot 6 layer - 11 slot 5 layer - 19 slot 4 layer - 11 slot 3 layer - 19 slot 2 layer - 11 slot 1 layer - 20 slot 1 layer - 28 slot 2 layer - 20 slot 3 layer - 28 slot 4 layer - 20 slot 5 layer - 28 slot 6 layer - 36 slot 6 layer - 28 slot 5 layer - 36 slot 4 layer - 28 slot 3 layer - 36 slot 2 layer - 28 slot 1 layer - 37 slot 1 layer - 45 slot 2 layer - 37 slot 3 layer - 45 slot 4 layer - 37 slot 5 layer - 45 slot 6 layer - 54 slot 6 layer - 46 slot 5 layer - 54 slot 4 layer - 46 slot 3 layer - 54 slot 2 layer - 46 slot 1 layer - 3 slot 1 layer - 11 slot 2 layer - 3 slot 3 layer - 11 slot 4 layer - 3 slot 5 layer - 11 slot 6 layer - 20 slot 6 layer - 12 slot 5 layer - 20 slot 4 layer - 12 slot 3 layer - 20 slot 2 layer - 12 slot 1 layer - 21 slot 1 layer - 29 slot 2 layer - 21 slot 3 layer - 29 slot 4 layer - 21 slot 5 layer - 29 slot 6 layer.

[0081] Similarly, the specific wiring mode of the U-phase second branch U2 is as follows:

[0082] 2 slot 1 layer - 10 slot 2 layer - 2 slot 3 layer - 10 slot 4 layer - 2 slot 5 layer - 10 slot 6 layer - 19 slot 6 layer - 11 slot 5 layer - 19 slot 4 layer - 11 slot 3 layer - 19 slot 2 layer - 11 slot 1 layer - 20 slot 1 layer - 28 slot 2 layer - 20 slot 3 layer - 28 slot 4 layer - 20 slot 5 layer - 28 slot 6 layer - 36 slot 6 layer - 28 slot 5 layer - 36 slot 4 layer - 28 slot 3 layer - 36 slot 2 layer - 28 slot 1 layer - 37 slot 1 layer - 45 slot 2 layer - 37 slot 3 layer - 45 slot 4 layer - 37 slot 5 layer - 45 slot 6 layer - 54 slot 6 layer - 46 slot 5 layer - 54 slot 4 layer - 46 slot 3 layer - 54 slot 2 layer - 46 slot 1 layer - 3 slot 1 layer - 11 slot 2 layer - 3 slot 3 layer - 11 slot 4 layer - 3 slot 5 layer - 11 slot 6 layer - 20 slot 6 layer - 12 slot 5 layer - 20 slot 4 layer - 12 slot 3 layer - 20 slot 2 layer - 12 slot 1 layer - 21 slot 1 layer - 29 slot 2 layer - 21 slot 3 layer - 29 slot 4 layer - 21 slot 5 layer - 29 slot 6 layer.

[0083] Table 6 Example 6 U-phase 2-branch wiring table

[0084]

[0085] Example 7

[0086] As Figure 7 shown, the present embodiment provides a stator assembly with a multi-branch flat wire winding, which comprises a stator core and a stator winding, the stator core is provided with 54 stator slots, and there are 6 wiring layers in each stator slot; the stator winding comprises a plurality of coils, and the coils are inserted into all the wiring layers of the stator slots; the stator winding comprises U, V and W phases, each phase is arranged in two directions with a rotation angle of 120° electrical, and each phase comprises three branches.

[0087] As shown in Table 7, the slot bottom layer is the first layer of wiring layer, the solid line is the welding end, and the dashed line is the hairpin end. The arrangement of the two branches of the U-phase winding in the stator slot is described as follows:

[0088] 2 slot 1 layer - 10 slot 2 layer - 2 slot 3 layer - 10 slot 4 layer - 2 slot 5 layer - 10 slot 6 layer - 19 slot 6 layer - 11 slot 5 layer - 19 slot 4 layer - 11 slot 3 layer - 19 slot 2 layer - 11 slot 1 layer - 19 slot 1 layer - 27 slot 2 layer - 19 slot 3 layer - 27 slot 4 layer - 19 slot 5 layer - 27 slot 6 layer - 36 slot 6 layer - 28 slot 5 layer - 36 slot 4 layer - 28 slot 3 layer - 36 slot 2 layer - 28 slot 1 layer - 39 slot 1 layer - 47 slot 2 layer - 39 slot 3 layer - 47 slot 4 layer - 39 slot 5 layer - 47 slot 6 layer - 2 slot 6 layer - 48 slot 5 layer - 2 slot 4 layer - 48 slot 3 layer - 2 slot 2 layer - 48 slot 1 layer.

[0089] Similarly, the specific wiring mode of the second branch U2 of the U-phase is as follows:

[0090] 3 slot 1 layer - 11 slot 2 layer - 3 slot 3 layer - 11 slot 4 layer - 3 slot 5 layer - 11 slot 6 layer - 20 slot 6 layer - 12 slot 5 layer - 20 slot 4 layer - 12 slot 3 layer - 20 slot 2 layer - 12 slot 1 layer - 20 slot 1 layer - 28 slot 2 layer - 20 slot 3 layer - 28 slot 4 layer - 20 slot 5 layer - 28 slot 6 layer - 37 slot 6 layer - 29 slot 5 layer - 37 slot 4 layer - 29 slot 3 layer - 37 slot 2 layer - 29 slot 1 layer - 37 slot 1 layer - 45 slot 2 layer - 37 slot 3 layer - 45 slot 4 layer - 37 slot 5 layer - 45 slot 6 layer - 54 slot 6 layer - 46 slot 5 layer - 54 slot 4 layer - 46 slot 3 layer - 54 slot 2 layer - 46 slot 1 layer.

[0091] Similarly, the specific wiring mode of the third branch U3 of the U-phase is as follows:

[0092] 1 slot 1 layer - 9 slot 2 layer - 1 slot 3 layer - 9 slot 4 layer - 1 slot 5 layer - 9 slot 6 layer - 18 slot 6 layer - 10 slot 5 layer - 18 slot 4 layer - 10 slot 3 layer - 18 slot 2 layer - 10 slot 1 layer - 21 slot 1 layer - 29 slot 2 layer - 21 slot 3 layer - 29 slot 4 layer - 21 slot 5 layer - 29 slot 6 layer - 38 slot 6 layer - 30 slot 5 layer - 38 slot 4 layer - 30 slot 3 layer - 38 slot 2 layer - 30 slot 1 layer - 38 slot 1 layer - 46 slot 2 layer - 38 slot 3 layer - 46 slot 4 layer - 38 slot 5 layer - 46 slot 6 layer - 1 slot 6 layer - 47 slot 5 layer - 1 slot 4 layer - 47 slot 3 layer - 1 slot 2 layer - 47 slot 1 layer.

[0093] Table 7 Example 7 U-phase 3-branch wiring table

[0094]

[0095] Embodiment 8

[0096] As shown in Table 8, the bottom layer of the slot is the first layer of wiring, the solid line is the welding end, and the dashed line is the hairpin end. The arrangement of the two branches of the U-phase winding in the stator slot is described as follows. Figure 8 The specific wiring mode of the first branch U1 of the U-phase is as follows:

[0097] The specific wiring mode of the second branch U2 of the U-phase is as follows:

[0098] The specific wiring mode of the third branch U3 of the U-phase is as follows:

[0099] The specific wiring mode of the first branch U1 of the U-phase is as follows:

[0100] The specific wiring mode of the second branch U2 of the U-phase is as follows:

[0101] The specific wiring mode of the third branch U3 of the U-phase is as follows:

[0102] 47 Slot 1 Layer - 1 Slot 1 Layer - 9 Slot 2 Layer - 1 Slot 3 Layer - 9 Slot 4 Layer - 1 Slot 5 Layer - 9 Slot 6 Layer - 18 Slot 6 Layer - 10 Slot 5 Layer - 18 Slot 4 Layer - 10 Slot 3 Layer - 18 Slot 2 Layer - 10 Slot 1 Layer - 21 Slot 1 Layer - 29 Slot 2 Layer - 21 Slot 3 Layer - 29 Slot 4 Layer - 21 Slot 5 Layer - 29 Slot 6 Layer - 38 Slot 6 Layer - 30 Slot 5 Layer - 38 Slot 4 Layer - 30 Slot 3 Layer - 38 Slot 2 Layer - 30 Slot 1 Layer - 38 Slot 1 Layer - 46 Slot 2 Layer - 38 Slot 3 Layer - 46 Slot 4 Layer - 38 Slot 5 Layer - 46 Slot 6 Layer - 1 Slot 6 Layer - 47 Slot 5 Layer - 1 Slot 4 Layer - 47 Slot 3 Layer - 1 Slot 2 Layer.

[0103] Table 8 Example 8 U Phase 3 Branch Wiring Table

[0104]

[0105] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A stator assembly having a multi-legged flat wire winding, characterized by, The stator assembly comprises a stator core and a stator winding, the stator core is provided with 54 stator slots, each of the stator slots has M wiring layers in common, wherein M≥2; the stator winding comprises a plurality of coils, the coils are inserted into all the wiring layers of the stator slots; the stator winding comprises three phases, each phase comprises at least two branches, each branch comprises a plurality of pole winding units, each of the pole winding units is wound from the first wiring layer to the Mth wiring layer in turn, and then is wound from the Mth wiring layer to the first wiring layer in turn, the beginning or the end of each of the pole winding units is connected to an adjacent pole winding unit; when each phase comprises three branches, the coils of the first wiring layer or the Mth wiring layer cross one wiring layer, and the sum of the crossing distances is 27 stator slots.

2. A stator assembly having a multi-legged flat wire winding according to claim 1, characterized in that Each of the stator windings comprises a first part and a second part, the first part comprises a wiring layer, and the second part comprises b wiring layers, a+b=M.

3. A stator assembly having a multi-legged flat wire winding according to claim 2, characterized in that The first part and the second part are staggered by at least one stator slot in the clockwise or counterclockwise direction along the circumference.

4. A stator assembly having a multi-legged flat wire winding according to claim 2, characterized in that The first part and the second part are connected by the coils crossing two wiring layers, and the crossing distance of the coils is greater than or less than t stator slots, t=54 / P, P is the number of poles of a rotor matched with the stator assembly.

5. A stator assembly having a multi-legged flat wire winding according to claim 4, characterized in that When the crossing distance of the coils crossing two wiring layers is greater than t stator slots, at least one of the coils crossing one wiring layer in the first wiring layer or the Mth wiring layer has a crossing distance less than t stator slots.

6. A stator assembly having a multi-legged flat wire winding according to claim 4, characterized in that In the first part and the second part, except for the first wiring layer or the Mth wiring layer, the remaining wiring layers are connected by the coils with a crossing distance of t stator slots.

7. A stator assembly having a multi-strand flat wire winding according to claim 1, characterized in that The coils of the remaining wiring layers of the pole winding units, except for the first wiring layer and the Mth wiring layer, cross two wiring layers, and the crossing distance of the coils is less than t stator slots, t=54 / P, P is the number of poles of a rotor matched with the stator assembly.

8. A stator assembly having a multi-legged flat wire winding according to claim 7, characterized in that One end of the coil is a welding end, and the other end is a hairpin end, and the crossing distances of the welding end and the hairpin end of the coils of the remaining wiring layers, except for the first wiring layer and the Mth wiring layer, are equal.

9. A stator assembly having a multi-strand flat wire winding according to claim 1, characterized in that The crossing distance of the coils of the first wiring layer or the Mth wiring layer is t stator slots, t=54 / P, P is the number of poles of a rotor matched with the stator assembly.

10. A stator assembly having a multi-legged flat wire winding according to claim 1, characterized in that The crossing distance of the coils of the first wiring layer or the Mth wiring layer is greater than or less than t stator slots, t=54 / P, P is the number of poles of a rotor matched with the stator assembly.

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