Flat wire winding stator assembly and motor

Abstract

The utility model relates to a flat wire winding stator assembly and a motor. The stator assembly comprises a stator iron core and a stator winding, the stator winding is arranged in a stator groove, N wiring layers are arranged in the stator groove, and every two adjacent wiring layers are divided into one group; coils are inserted into all wiring layers of the stator slots; the coil crosses one or two wiring layers; the coil span across the two wiring layers of the same wiring layer group is 9 stator slots, and the coil span across the two wiring layers from the two wiring layer groups is 8 or 10 stator slots. Compared with the prior art, the stator assembly has the advantages that the winding arrangement of the stator assembly with even wiring layers is realized, the line types of flat wire winding coils are reduced within the acceptable range of motor performance change, the span is reasonable, the manufacturing is convenient, the height of the end part of the flat wire is reduced, and the efficiency of the motor is improved; and the fifth, seventh, eleventh and thirteenth harmonic waves of the motor are weakened, and the NVH vibration noise problem of the motor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor stator subassembly design especially, it is a kind of flat wire winding stator subassembly and motor. BACKGROUND

[0002] Flat wire motor is initially mainly applied to the scene needing larger power and generator set, with the development of new energy automobile industry, flat wire motor is also applied to vehicle field;The stator winding of flat wire motor uses flat copper wire as winding wire;Compared with round wire motor, flat wire motor has higher slot fill factor, therefore, under the same power, the volume of flat wire motor is smaller, material is less, cost is lower.

[0003] After searching, application publication number CN115912696A discloses stator subassembly and motor with same, specifically discloses: in the stator subassembly, M layers effective edges belonging to the same phase are provided in the stator slot along the radial direction, M is even and M is greater than or equal to 4;The total winding assembly corresponding to each phase of the stator subassembly includes a number of parallel branches, a is less than or equal to M / 2, and the magnetic circuits of different branches are symmetrical to each other;Each branch is connected in series by M / 2 coil groups;Each coil group is connected in series by a coil set, and each coil set includes at least one full-pitch coil and at least one variable-pitch coil;The pitch of the full-pitch coil is the pole pitch of the stator subassembly, and the pitch of the variable-pitch coil is not equal to the pole pitch of the stator subassembly.

[0004] But the prior art span type is many, coil wire type is many, winding end is high, motor efficiency is low.Therefore, how to design a kind of stator subassembly with high efficiency and convenient manufacturing is the technical problem to be solved. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the defects of the prior art, such as many coil wire types and high winding end, which leads to low motor efficiency, and provides a flat wire winding stator subassembly and motor.

[0006] The utility model can achieve the purpose by the following technical solutions.

[0007] According to one aspect of the utility model, a flat wire winding stator subassembly is provided, which includes a stator core and a stator winding, the stator core is provided with a stator slot, the stator winding is arranged in the stator slot, there are N layers of wiring layers in the stator slot, wherein N is an even number;Two adjacent wiring layers form a group, and there are N / 2 groups of wiring layer groups;The stator winding includes a plurality of coils, and the coils are inserted into all wiring layers of the stator slot;The coils span one or two wiring layers;The coil span across two wiring layers of the same wiring layer group is 9 stator slots, and the coil span across two wiring layers from two wiring layer groups is 8 or 10 stator slots.

[0008] As a preferred technical scheme, the coil span across one layer of wiring layer is 8 or 10 stator slots.

[0009] As a preferred technical scheme, the coil across one layer of wiring layer is inserted in the first layer and / or the Nth layer of the stator slot.

[0010] As a preferred technical scheme, the two layers of wiring layer of the two groups of wiring layer groups are adjacent wiring layers.

[0011] As a preferred technical scheme, the stator winding comprises a three-phase winding, each phase winding comprises two symmetrically arranged branches, and the two branches are connected in series or in parallel.

[0012] As a preferred technical scheme, the two adjacent wiring layer groups are a first wiring layer group and a second wiring layer group, and the coils on the same branch occupy all the stator slots with slot numbers of n1, n2, …, n i on the first wiring layer group, and all the stator slots with slot numbers of n1+1, n2+1, …, n i +1 or n1-1, n2-1, …, n i -1 on the second wiring layer group.

[0013] As a preferred technical scheme, the coil comprises a hairpin end and a welding end, and the two ends of the branch are led out from the hairpin end.

[0014] As a preferred technical scheme, the stator slot has a total of 6 layers of wiring layers; the coil span between the 1st layer and the 2nd layer, between the 3rd layer and the 4th layer, and between the 5th layer and the 6th layer is 9 stator slots, and the coil span between the 2nd layer and the 3rd layer and between the 4th layer and the 5th layer is 8 or 10 stator slots.

[0015] As a preferred technical scheme, the stator winding comprises a three-phase winding, the three-phase winding is arranged by rotating one phase winding in two directions by 120° electrical angle respectively, and the three-phase winding is connected in star or in delta.

[0016] According to another aspect of the utility model, a flat wire winding motor is provided, which comprises a flat wire winding stator assembly.

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

[0018] 1) The utility model realizes the winding arrangement of the stator assembly with an even number of wiring layers, reduces the wire type of the flat wire winding coil within an acceptable range of motor performance change, reasonably arranges the span, is convenient for manufacturing, reduces the height of the flat wire end, improves the efficiency of the motor, and the arrangement mode of the utility model can also weaken the 5th, 7th, 11th and 13th harmonics of the motor to improve the NVH vibration noise problem of the motor.

[0019] 2) The utility model contains 2 symmetrical branches, and three -phase current can form rotating magnetic field. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of flat wire winding stator subassembly of the utility model;

[0021] Figure 2 It is the stator winding arrangement drawing of the utility model embodiment 1;

[0022] Figure 3 It is the stator winding local arrangement drawing of the utility model embodiment 1;

[0023] Figure 4 It is the branch connection drawing of the utility model embodiment 1 and embodiment 2. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than 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.

[0025] As Figure 1 shown, the utility model provides a kind of flat wire winding stator subassembly, and stator subassembly includes stator core and stator winding, and 54 stator slots are provided on stator core, and stator winding includes multiple coils, and coil is arranged in stator slot, and coil includes hairpin end and welding end.Stator winding includes three-phase winding, and each phase winding includes 2 symmetrical branches, and 2 branches are connected in series or parallel, and the two ends of branch are led out from hairpin end;Three-phase winding is arranged by rotating 120 ° electric angle in two directions by one phase winding respectively, and three-phase winding is star-connected or delta-connected.

[0026] Each stator slot is equipped with N layers of wiring layer, wherein N is even, and coil is inserted in all wiring layers of stator slot;Adjacent two layers of wiring layer are divided into a group, and there are N / 2 groups of wiring layer groups.Coil includes first type coil and second type coil, first type coil crosses two layers of wiring layer, and second type coil crosses one layer of wiring layer, and coil crossing one layer of wiring layer is inserted in the 1st layer and / or the Nth layer of stator slot;Wherein, first type coil includes two kinds, one kind crosses two layers of coil of same wiring layer group, and the span is 9 stator slots;The other crosses two layers of coil of different wiring layer group, and the span is 8 or 10 stator slots;The span of second type coil is 8 or 10 stator slots.

[0027] Two adjacent wiring layer groups are the first wiring layer group and the second wiring layer group. The coils on the same branch occupy all the stator slots in the first wiring layer group with slot numbers n1, n2, ..., ni, where i is the number of stator slots occupied by the coil; and occupy all the stator slots in the second wiring layer group with slot numbers n1+1, n2+1, ..., ni+1 or n1-1, n2-1, ..., ni-1.

[0028] Example 1

[0029] This utility model provides a flat wire winding stator assembly, which includes a stator core and a stator winding. The stator core has 54 stator slots, and the stator winding includes multiple coils arranged in the stator slots. Each stator slot has 6 wiring layers; the first and second layers, the third and fourth layers, and the fifth and sixth layers are each divided into a wiring layer group. Figure 2 and Figure 3 As shown, the stator windings include three-phase windings U, V, and W. Each phase winding contains two symmetrically arranged branches connected in parallel. For example, phase U includes U1 and U2. The three-phase windings are arranged by rotating one of the phase windings by 120° electrical angles in two directions. The arrangement of U1 and U2 is shown in Table 1.

[0030] Table 1. Wiring table for U-phase 2-branch in Example 1

[0031]

[0032] In the first branch U1, the bottom of the slot is designated as layer 1 of a 6-layer wiring system, and the opening of the slot is designated as layer 6 of a 6-layer wiring system. The wiring configuration is as follows:

[0033] 3-slot 1st layer — 12-slot 2nd layer — 21-slot 1st layer — 30-slot 2nd layer — 39-slot 1st layer — 48-slot 2nd layer

[0034] —4 slots, 3 layers—13 slots, 4 layers—22 slots, 3 layers—31 slots, 4 layers—40 slots, 3 layers—49 slots, 4 layers

[0035] —3 slots, 5 layers—12 slots, 6 layers—21 slots, 5 layers—30 slots, 6 layers—39 slots, 5 layers—48 slots, 6 layers

[0036] —2 slots, 6 layers—47 slots, 5 layers—38 slots, 6 layers—29 slots, 5 layers—20 slots, 6 layers—11 slots, 5 layers

[0037] —3 slots, 4 layers—48 slots, 3 layers—39 slots, 4 layers—30 slots, 3 layers—21 slots, 4 layers—12 slots, 3 layers

[0038] —2 slots, 2 layers—47 layers, 3 slots—38 slots, 2 layers—29 slots, 1 layer—20 slots, 2 layers—11 slots, 1 layer

[0039] - 1 slot 1 layer - 10 slot 2 layer - 19 slot 1 layer - 28 slot 2 layer - 37 slot 1 layer - 46 slot 2 layer

[0040] - 2 slot 3 layer - 11 slot 4 layer - 20 slot 3 layer - 29 slot 4 layer - 38 slot 3 layer - 47 slot 4 layer

[0041] - 1 slot 5 layer - 10 slot 6 layer - 19 slot 5 layer - 28 slot 6 layer - 37 slot 5 layer - 46 slot 6 layer

[0042] The wiring mode of other branches can be obtained from Table 1, as shown, 2 branches are connected in parallel. Figure 4 According to the U phase 2 branches, the V phase and the W phase can be arranged at a phase difference of 120° electric angle, and the lead position is adjusted according to the actual situation.

[0043] Embodiment 2

[0044] The utility model provides a flat wire winding stator subassembly, stator subassembly includes stator core and stator winding, be equipped with 54 stator slots on the stator core, and the stator winding includes a plurality of coils, and the coil is arranged in the stator slot, and 6 layers of wiring layers are equipped in each stator slot, the first layer and the second layer, the third layer and the fourth layer and the fifth layer and the sixth layer are divided into a group wiring layer group respectively. The stator winding includes U, V and W three phase windings, and each phase winding contains 2 branches of symmetrical arrangement, and 2 branches are connected in parallel, for example U1 and U2 are included in U phase, and three phase windings are arranged in two directions by 120° electric angle from one phase winding respectively. The arrangement mode of U1 and U2 is as shown in table 1.

[0045] Table 2 U phase 2 branch wiring table of embodiment 2

[0046]

[0047] In the first branch U1, the first layer of 6 layers of wiring layers is recorded at the slot bottom, and the sixth layer of 6 layers of wiring layers is recorded at the slot opening. Its connection form is:

[0048] 3 slot 1 layer - 12 slot 2 layer - 21 slot 1 layer - 30 slot 2 layer - 39 slot 1 layer - 48 slot 2 layer

[0049] - 2 slot 3 layer - 11 slot 4 layer - 20 slot 3 layer - 29 slot 4 layer - 38 slot 3 layer - 47 slot 4 layer

[0050] - 3 slot 5 layer - 12 slot 6 layer - 21 slot 5 layer - 30 slot 6 layer - 39 slot 5 layer - 48 slot 6 layer

[0051] - 2 slot 6 layer - 47 slot 5 layer - 38 slot 6 layer - 29 slot 5 layer - 20 slot 6 layer - 11 slot 5 layer

[0052] - 1 slot 4 layer - 46 slot 3 layer - 37 slot 4 layer - 28 slot 3 layer - 19 slot 4 layer - 10 slot 3 layer

[0053] - 2 slots 2 layers - 47 slots 3 slots - 38 slots 2 layers - 29 slots 1 layer - 20 slots 2 layers - 11 slots 1 layer

[0054] - 1 slot 1 layer - 10 slots 2 layers - 19 slots 1 layer - 28 slots 2 layers - 37 slots 1 layer - 46 slots 2 layers

[0055] - 54 slots 3 layers - 9 slots 4 layers - 18 slots 3 layers - 27 slots 4 layers - 36 slots 3 layers - 45 slots 4 layers

[0056] - 1 slot 5 layers - 10 slot 6 layers - 19 slot 5 layers - 28 slot 6 layers - 37 slot 5 layers - 46 slot 6 layers

[0057] The wiring mode of other branches can be obtained from Table 2, as shown, 2 branches are connected in parallel. According to the U phase 2 branches, the V phase and the W phase can be arranged in 120° electrical angle difference, and the lead position is adjusted according to the actual situation. Figure 4

[0058] Embodiment 3

[0059] The utility model provides a flat wire winding stator subassembly, stator subassembly includes stator core and stator winding, be equipped with 54 stator slots on the stator core, and the stator winding includes a plurality of coils, and the coil is arranged in the stator slot, and 6 layers wiring layer are equipped in each stator slot, the first layer and the second layer, the third layer and the fourth layer and the fifth layer and the sixth layer are divided into a group wiring layer group respectively. The stator winding includes U, V and W three phase windings, and each phase winding contains 2 symmetrical arranged branches, and 2 branches are connected in parallel, for example U1 and U2 are included in U phase, and three phase windings are arranged in two directions by 120 DEG electrical angle from one phase winding respectively. The arrangement mode of U1 and U2 is as shown in table 1.

[0060] Table 3 U phase 2 branch wiring table of embodiment 3

[0061]

[0062] In the first branch U1, the first layer of 6 layers wiring layer is recorded at the slot bottom, and the sixth layer of 6 layers wiring layer is recorded at the slot opening. Its connection form is:

[0063] 3 slots 1 layer - 12 slots 2 layers - 21 slots 1 layer - 30 slots 2 layers - 39 slots 1 layer - 48 slots 2 layers

[0064] - 4 slots 3 layers - 13 slots 4 layers - 22 slots 3 layers - 31 slots 4 layers - 40 slots 3 layers - 49 slots 4 layers

[0065] - 5 slots 5 layers - 14 slots 6 layers - 23 slots 5 layers - 32 slots 6 layers - 41 slots 5 layers - 50 slots 6 layers

[0066] ​- 4th slot 6th layer - 49th slot 5th layer - 40th slot 6th layer - 31st slot 5th layer - 22nd slot 6th layer - 13th slot 5th layer

[0067] - 3rd slot 4th layer - 48th slot 3rd layer - 39th slot 4th layer - 30th slot 3rd layer - 21st slot 4th layer - 12th slot 3rd layer

[0068] - 2nd slot 2nd layer - 47th layer 3rd slot - 38th slot 2nd layer - 29th slot 1st layer - 20th slot 2nd layer - 11th slot 1st layer

[0069] - 1st slot 1st layer - 10th slot 2nd layer - 19th slot 1st layer - 28th slot 2nd layer - 37th slot 1st layer - 46th slot 2nd layer

[0070] - 2nd slot 3rd layer - 11th slot 4th layer - 20th slot 3rd layer - 29th slot 4th layer - 38th slot 3rd layer - 47th slot 4th layer

[0071] - 3rd slot 5th layer - 12th slot 6th layer - 21st slot 5th layer - 30th slot 6th layer - 39th slot 5th layer - 48th slot 6th layer

[0072] The wiring mode of other branches can be obtained from Table 2. According to the U-phase 2-branch, the V-phase and the W-phase can be arranged at a phase difference of 120° electrical angle, and the position of the lead-out wire is adjusted according to actual conditions.

[0073] Embodiment 4

[0074] The utility model provides a flat wire winding motor, wherein the flat wire winding stator assembly of any one of embodiment 1~embodiment 3 is adopted.

[0075] The winding arrangement mode can realize 54-slot 6-pole 6-layer flat wire motor 2-branch series-parallel connection, and a rotating magnetic field can be formed by passing three-phase current. A short 8-span hairpin end-out wire flat wire winding arrangement mode is provided, which is characterized as 54-slot 6-pole motor 2-branch, and based on the flat wire winding arrangement mode, three-phase symmetrical non-circulating winding arrangement can be realized.

[0076] Effect 1: the winding arrangement mode can weaken 5th, 7th, 11th and 13th harmonics to improve the NVH vibration noise problem of the motor, and under the consideration of cost and performance based on mass production, the adverse effects caused by the use of flat wire technology are minimized.

[0077] Effect 2: the line type is reduced, the end height is also reduced, and the efficiency of the motor is improved, and under the consideration of cost and performance based on mass production, the adverse effects caused by the use of flat wire technology are minimized.

[0078] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be encompassed within 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 flat wire winding stator assembly, characterized in that, The stator assembly includes a stator core and stator windings. The stator core has stator slots, and the stator windings are arranged in the stator slots. There are N wiring layers in the stator slots, where N is an even number. Two adjacent wiring layers are grouped together, and there are a total of N / 2 wiring layer groups. The stator windings include multiple coils, and coils are inserted in all wiring layers of the stator slots. The coils span one or two wiring layers. The span of two wiring layers spanning the same wiring layer group is 9 stator slots, and the span of two wiring layers spanning two wiring layers from two different wiring layer groups is 8 or 10 stator slots.

2. The flat wire winding stator assembly according to claim 1, characterized in that, The coil spanning a wiring layer has a span of 8 or 10 stator slots.

3. A flat wire winding stator assembly according to claim 2, characterized in that, The coil that spans one wiring layer is inserted into the first and / or Nth layer of the stator slot.

4. A flat wire winding stator assembly according to claim 1, characterized in that, The two wiring layers in the two sets of wiring layers are adjacent wiring layers.

5. A flat wire winding stator assembly according to claim 1, characterized in that, The stator winding includes a three-phase winding, each phase winding comprising two symmetrically arranged branches, which are connected in series or in parallel.

6. A flat wire winding stator assembly according to claim 5, characterized in that, Two adjacent wiring layer groups are the first wiring layer group and the second wiring layer group. For coils on the same branch, the stator slot numbers occupied by all the stator slots in the first wiring layer group are n1, n2, ..., n. i Where i is the number of stator slots occupied by the coil; the slot numbers of all stator slots occupied on the second wiring layer are n1+1, n2+1, ..., n i +1 or n1-1, n2-1, ..., n i -1.

7. A flat wire winding stator assembly according to claim 5 or 6, characterized in that, The coil includes a hairpin end and a soldering end, and the two ends of the branch are led out from the hairpin end.

8. A flat wire winding stator assembly according to claim 1, characterized in that, The stator slot contains a total of 6 wiring layers; the coil span between layers 1 and 2, between layers 3 and 4, and between layers 5 and 6 is 9 stator slots, and the coil span between layers 2 and 3, and between layers 4 and 5, is 8 or 10 stator slots.

9. A flat wire winding stator assembly according to claim 1, characterized in that, The stator winding includes a three-phase winding, which is arranged by rotating one of the phase windings 120° electrical angles in two directions respectively. The three-phase windings are connected in a star or delta configuration.

10. A flat wire winding motor, characterized in that, Includes the flat wire winding stator assembly described in any one of claims 1 to 9.

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