Flat wire winding stator assembly and motor

Abstract

The stator assembly comprises a stator core and stator windings, 54 stator grooves are arranged on the stator core, the stator windings are arranged in the stator grooves, the number of layers of the stator windings is N, N is larger than or equal to 3 and is an odd number, the stator windings are three-phase stator windings, each stator winding comprises a hairpin end and a welding end, and the hairpin ends and the welding ends are arranged in the stator grooves. The span of the hairpin end is 8 stator slots or 11 stator slots, and the span of the welding end is 9 stator slots; one phase of the stator winding comprises a plurality of symmetrical branches which are connected in series or in parallel. Compared with the prior art, the flat wire motor has the advantages that the whole-pitch winding arrangement of the flat wire motor with 54 slots, 6 poles and odd flat wire layers is realized; the number of layers is odd, so that the problem of large span of the number of turns of even layers is solved, and the optimal performance, size and cost of the motor are realized; and the arrangement mode of the stator windings is that branches are symmetrical, and ring current between the branches is eliminated.

Description

Technical Field

[0001] The utility model relates to the design of a motor stator component, in particular to a flat wire winding stator component and a motor. Background Art

[0002] Flat wire motors use flat copper wire in the stator winding. This flat design allows for a tighter winding arrangement, which increases the slot fill factor and conductor filling factor of the motor. This helps to improve the power density and efficiency of the motor. Currently used 6-pole 54-slot flat wire motors are almost all even-numbered conductors (such as 2, 4, 6, 8 layers, etc.), and there are very few odd-numbered conductors. This is mainly due to the difficulty in connecting the odd-numbered flat wire windings and the variety of wire types, which limits the number of turns in the design, unlike the round wire motor, which can be any positive integer.

[0003] After searching, application publication number CN115765251A discloses a stator assembly and a motor having the same, and specifically discloses: the stator assembly includes a stator core and a coil winding, the stator core is provided with a stator slot, the stator slot is used to accommodate a part of the coil winding, the coil winding includes an internal coil group, a middle coil group and an external coil group; in the same stator slot, part of the internal coil group, part of the middle coil group and part of the external coil group are stacked in sequence; the internal coil group includes a first type of coil, the middle coil group includes a second type of coil, the external coil group includes a second type of coil and a third type of coil, two effective sides of the first type of coil are respectively located in the same layer in different stator slots, two effective sides of the second type of coil are respectively located in adjacent layers of different stator slots, two effective sides of the third type of coil are respectively located in adjacent layers of different stator slots, the second type of coil is in a stacked winding form, and the first type of coil and the third type of coil are in a wave winding form.

[0004] However, the prior art has many types of spans and lines, and is difficult to manufacture. Therefore, how to design a stator assembly suitable for a 54-slot 6-pole (q=3) motor with an odd number of stator slots and easy to manufacture is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a flat wire winding stator assembly and a motor in order to overcome the defects of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a flat wire winding stator assembly is provided, which cooperates with a 6-pole rotor. The stator assembly includes a stator core and a stator winding. The stator core is provided with 54 stator slots. The stator winding is arranged in the stator slots, and the number of layers is N, wherein N≥3 and N is an odd number. The stator winding is a three-phase symmetrical full-pitch stator winding, including a hairpin end and a welding end. The hairpin end has a span of 8 stator slots or 11 stator slots, and the welding end has a span of 9 stator slots. One phase of the stator winding includes multiple symmetrical branches, and the branches are connected in series or in parallel.

[0008] As a preferred technical solution, the span of the hairpin end is 11 stator slots, 8 stator slots and 8 stator slots, which are cycled in sequence. Then the span of the hairpin end and the welding end of the stator winding is 11 stator slots and 9 stator slots, 8 stator slots and 9 stator slots, and 8 stator slots and 9 stator slots, which are cycled in sequence until the stator winding is arranged in the stator slots.

[0009] As a preferred technical solution, the number of stator slot layers is 5, and one phase of the stator winding includes 3 branches or 1 branch.

[0010] As a preferred technical solution, the number of stator slot layers is 7, and one phase of the stator winding includes 3 branches or 1 branch.

[0011] As a preferred technical solution, the stator assembly also includes a welding end copper bar, which includes a parallel copper bar and a series copper bar, and multiple symmetrical branches of one phase of the stator winding are connected in parallel or in series through the parallel copper bar and the series copper bar.

[0012] As a preferred technical solution, one phase of the stator winding includes three branches, and the three branches are connected in parallel through the parallel copper bar to form a three-branch arrangement structure of the stator winding.

[0013] As a preferred technical solution, one phase of the stator winding includes three branches, and the three branches are connected in series by the series copper bar or the three branches are welded in series head to tail to obtain a total branch, forming a branch arrangement structure of the stator winding.

[0014] As a preferred technical solution, the line shape of the stator winding is a U-shaped line, including an 11-stator slot span line shape and an 8-stator slot span line shape.

[0015] As a preferred technical solution, the three-phase stator winding is arranged by rotating one phase by 120 electrical degrees in two directions, and the three-phase winding is connected in star or triangle.

[0016] According to another aspect of the utility model, a flat wire winding motor is provided, including 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 full-pitch winding arrangement of a flat wire motor with 54 slots and 6 poles and an odd number of flat wire layers. The number of layers is an odd number, which increases the optional range of turns and achieves the optimal motor performance, size and cost. The span of the hairpin end is 8 stator slots or 11 stator slots, and the span of the welding end is 9 stator slots. There are few types of wire types, which is easy to manufacture;

[0019] 2) The stator winding arrangement of the utility model is symmetrical in branches, eliminating the circulating current between branches;

[0020] 3) The utility model can conveniently connect branches through parallel copper bars and series copper bars at the welding end, and can realize the arrangement structure of different branches without changing the span arrangement of the hairpin end and the welding end, which is convenient for processing and reduces production costs; the ends of each branch can also be welded together at the welding end to realize branch changes, reduce the complexity of the copper bar, and reduce the amount and cost of the copper bar;

[0021] 4) The U-shaped coil of the utility model only includes coils of two types of spans, which is convenient for production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-phase winding arrangement diagram of Embodiment 1 of the utility model;

[0023] Figure 2 This is the U-phase winding arrangement diagram of Example 1 of the utility model;

[0024] Figure 3 This is a partial diagram of the U-phase winding arrangement of Example 1 of the utility model;

[0025] Figure 4 This is a branch connection diagram of Example 1 of the utility model;

[0026] Figure 5 This is a three-phase winding arrangement diagram of Embodiment 2 of the utility model;

[0027] Figure 6 This is the U-phase winding arrangement diagram of Embodiment 2 of the present utility model;

[0028] Figure 7 This is a partial diagram of the U-phase winding arrangement of Example 2 of the utility model;

[0029] Figure 8 This is a branch connection diagram of Embodiment 2 of the present utility model;

[0030] Fig. 9 This is a schematic diagram of a stator assembly of Embodiment 2 of the present utility model;

[0031] Fig.10This is a three-phase winding arrangement diagram of Embodiment 3 of the present utility model;

[0032] Fig.11 This is the U-phase winding arrangement diagram of Embodiment 3 of the present utility model;

[0033] Fig.12 This is a partial diagram of the U-phase winding arrangement of Example 3 of the utility model;

[0034] Fig.13 This is a branch connection diagram of Embodiment 3 of the present utility model;

[0035] Fig.14 This is a three-phase winding arrangement diagram of Embodiment 4 of the utility model;

[0036] Fig.15 This is the U-phase winding arrangement diagram of Embodiment 4 of the present utility model;

[0037] Fig.16 This is a partial diagram of the U-phase winding arrangement of Example 4 of the utility model;

[0038] Fig.17 This is the branch connection diagram of Example 4 of the utility model. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0040] The utility model provides a flat wire winding stator assembly and a motor. The stator assembly cooperates with a rotor with a pole number of 2p=6, including a stator core, a stator winding and a welding end copper bar. The stator core is provided with 54 stator slots. The stator winding is arranged in the stator slots, and the number of layers is N, N≥3 and N is an odd number. The stator winding is a three-phase stator winding, including a hairpin end and a welding end. The hairpin end spans 8 stator slots or 11 stator slots, and the welding end spans 9 stator slots; one phase of the stator winding includes 3 branches or 1 branch. Based on this arrangement, the symmetrical arrangement of the odd-numbered layers of three-phase windings can be achieved, and the circulating current between the branches can be eliminated. With the design of the end connection copper bar, the connection between 1 branch and 3 branches can be conveniently performed, and only N+1 types of U-shaped wires are required, which solves the problem of various line types and difficult connection of the odd-numbered layers of windings in the past, improves the compatibility of the production line, and reduces the production cost.

[0041] Example 1

[0042] The utility model provides a flat wire winding stator assembly, 54 slots, 6 poles and 3 phases, such as Figure 1 to Figure 3 As shown in Table 1, N = 5, when N takes other values, the winding connection method can be determined by simple analogy, reducing or increasing the number of flat wire layers). According to this wiring method, a three-phase rotating magnetic field can be formed after the current is passed. The U-shaped line of this wiring form is divided into two types with a span of 8 and a span of 11, with a total of N+1 types. This wiring form has 3 branches, namely U1, U2 and U3.

[0043] Table 1U Phase 3 Branch Wiring Table

[0044]

[0045] In the first branch U1, the slot is marked as the first layer of the 5-layer flat wire, and the bottom of the slot is marked as the fifth layer of the 5-layer flat wire. The connection form is:

[0046] 1 slot 1 layer - 12 slot 2 layer - 21 slot 1 layer - 29 slot 2 layer - 38 slot 1 layer - 46 slot 2 layer - 1 slot 3 layer - 12 slot 4 layer - 21 slot 3 layer - 29 slot 4 layer - 38 slot 3 layer - 46 slot 4 layer - 1 slot 5 layer - 47 slot 5 layer - 38 slot 5 layer - 30 slot 5 layer - 21 slot 5 layer - 10 slot 5 layer - 1 slot 4 layer - 47 slot 3 layer - 38 slot 4 layer - 30 slot 3 layer - 21 slot 4 layer - 10 slot 3 layer - 1 slot 2 layer - 47 slot 1 layer - 38 slot 2 layer - 30 slot 1 layer - 21 slot 2 layer - 10 slot 1 layer.

[0047] The wiring methods of other branches can be obtained from Table 1. Figure 4 As shown, the parallel copper bars of the welding end copper bars connect the three branches in parallel to form a three-branch arrangement structure of the stator winding.

[0048] According to the three branches of the U phase, the V phase and the W phase can be arranged with a phase difference of 120° electrical angle, and the three-phase winding is connected in Y type (i.e. star type).

[0049] This embodiment realizes the connection of flat wire motor windings with 54 slots, 6 poles, N layers and 3 branches (N is an odd number ≥ 3, taking N = 5 as an example), and a rotating magnetic field can be formed by passing a three-phase current. A flat wire winding arrangement method with terminal characterization as a 54-slot, 6-pole motor with 5 layers and 3 branches of full pitch is provided. This arrangement breaks the constraint that the flat wire winding must be an even number of layers, increases the range of motor turns that can be selected, and can more accurately match power and torque and reduce costs. There are N+1 types of line types in total. This arrangement solves the problem of numerous line types and difficult connections of odd-numbered layer windings in the past, improves the compatibility of production lines, and reduces production costs. This arrangement can realize a three-phase symmetrical winding arrangement and eliminate the problem of circulating current between branches of asymmetric structures.

[0050] Example 2

[0051] The utility model provides a flat wire winding stator assembly, 54 slots, 6 poles and 3 phases, such as Figure 5 to Figure 7As shown, N = 5, when N takes other values, the winding connection method can be determined by simple analogy, reducing or increasing the number of flat wire layers). According to this wiring method, a three-phase rotating magnetic field can be formed after the current is passed. The U-shaped line of this wiring form is divided into two types with a span of 8 and a span of 11, with a total of N+1 types. This wiring form has 1 branch, which is U, and U is U1, U2 and U3 in series.

[0052] like Figure 8 and Fig. 9 As shown, welding points are added to the welding ends to connect the three branches in series to obtain one main branch, thus forming a one-branch arrangement structure of the stator winding.

[0053] According to the U phase 1 branch, the V phase and W phase can be arranged with a phase difference of 120° electrical angle, and the three-phase winding is connected in Y type (i.e. star type).

[0054] This embodiment is based on the three branches of embodiment 1. By adding welding points to connect the three branches in series, one branch connection is achieved. A rotating magnetic field can be formed by passing a three-phase current, and a flat wire winding arrangement with a terminal representation of a 54-slot, 6-pole motor with 5 layers and 1 branch with full pitch is provided. This arrangement breaks the constraint that the flat wire winding must be an even number of layers, increases the range of motor turns that can be selected, and can more accurately match power and torque and reduce material costs. This arrangement solves the problem of various odd-numbered winding line types and difficult connections in the past, improves production line compatibility, and reduces production costs. This arrangement can achieve a three-phase symmetrical winding arrangement and eliminate the problem of circulating current between branches of an asymmetric structure.

[0055] Example 3

[0056] The utility model provides a flat wire winding stator assembly, 54 slots, 6 poles and 3 phases, such as Figure 10 to Figure 12 As shown in Table 2, N = 7, when N takes other values, the winding connection method can be determined by simple analogy, reducing or increasing the number of flat wire layers). According to this wiring method, a three-phase rotating magnetic field can be formed after the current is passed. The U-shaped line of this wiring form is divided into two types with a span of 8 and a span of 11, with a total of N+1 types. This wiring form has 3 branches, namely U1, U2 and U3.

[0057] In the first branch U1, the slot is marked as the first layer of the 7-layer flat wire, and the bottom of the slot is marked as the 7th layer of the 7-layer flat wire. The connection form is:

[0058] 1 slot 1 layer - 12 slot 2 layer - 21 slot 1 layer - 29 slot 2 layer - 38 slot 1 layer - 46 slot 2 layer - 1 slot 3 layer - 12 slot 4 layer - 21 slot 3 layer - 29 slot 4 layer - 38 slot 3 layer - 46 slot 4 layer - 1 slot 5 layer - 12 slot 6 layer - 21 slot 5 layer - 29 slot 6 layer - 38 slot 5 layer - 46 slot 6 layer - 1 slot 7 layer - 47 slot 7 layer - 38 slot 7 layer - 30 slot 7 layer - 21 slot 7 layer - 10 slot 7 layer - 1 slot 6 layer - 47 slot 5 layer - 38 slot 6 layer - 30 slot 5 layer - 21 slot 6 layer - 10 slot 5 layer - 1 slot 4 layer - 47 slot 3 layer - 38 slot 4 layer - 30 slot 3 layer - 21 slot 4 layer - 10 slot 3 layer - 1 slot 2 layer - 47 slot 1 layer - 38 slot 2 layer - 30 slot 1 layer - 21 slot 2 layer - 10 slot 1 layer.

[0059] The wiring methods of other branches can be obtained from Table 2. Fig.13 As shown, the parallel copper bars of the welding end copper bars connect the three branches in parallel to form a three-branch arrangement structure of the stator winding.

[0060] According to the three branches of the U phase, the V phase and the W phase can be arranged with a phase difference of 120° electrical angle, and the three-phase winding is connected in Y type (i.e. star type).

[0061] Table 2U phase 3 branch wiring table

[0062]

[0063] This embodiment realizes the connection of flat wire motor windings with 54 slots, 6 poles, N layers and 3 branches (N is an odd number ≥ 3, taking N = 7 as an example), and a rotating magnetic field can be formed by passing a three-phase current. A flat wire winding arrangement method with a terminal representation of a 54-slot, 6-pole motor with 7 layers and 3 branches of full pitch is provided. This arrangement breaks the constraint that the flat wire winding must be an even number of layers, increases the range of motor turns that can be selected, and can more accurately match power and torque and reduce costs. There are a total of N+1 line types. This arrangement solves the problem of numerous line types and difficult connections for odd-numbered layer windings in the past, improves the compatibility of production lines, and reduces production costs. This arrangement can realize a three-phase symmetrical winding arrangement and eliminate the problem of circulating current between branches of asymmetric structures.

[0064] Example 4

[0065] The utility model provides a flat wire winding stator assembly, 54 slots, 6 poles and 3 phases, such as Figure 14 to Figure 16 As shown, N = 7, when N takes other values, the winding connection method can be determined by simple analogy, reducing or increasing the number of flat wire layers). According to this wiring method, a three-phase rotating magnetic field can be formed after the current is passed. The U-shaped line of this wiring form is divided into two types with a span of 8 and a span of 11, with a total of N+1 types. This wiring form has 1 branch, which is U, and U is U1, U2 and U3 in series.

[0066] like Fig.17As shown, welding points are added to the welding ends to connect the three branches in series to obtain one main branch, thus forming a one-branch arrangement structure of the stator winding.

[0067] According to the U phase 1 branch, the V phase and W phase can be arranged with a phase difference of 120° electrical angle, and the three-phase winding is connected in Y type (i.e. star type).

[0068] This embodiment is based on the three branches of embodiment 3. By adding welding points to connect three branches in series, one branch connection is achieved. A rotating magnetic field can be formed by passing three-phase current, and a flat wire winding arrangement with a terminal representation of a 54-slot, 6-pole motor with 7 layers and 1 branch with full pitch is provided. This arrangement breaks the constraint that the flat wire winding must be an even number of layers, increases the range of motor turns that can be selected, and can more accurately match power and torque and reduce material costs. This arrangement solves the problem of various odd-numbered winding line types and difficult connections in the past, improves production line compatibility, and reduces production costs. This arrangement can achieve a three-phase symmetrical winding arrangement and eliminate the problem of circulating current between branches of an asymmetric structure.

[0069] Example 5

[0070] The utility model provides a flat wire winding motor, wherein the flat wire winding stator assembly of any one of the first to fourth embodiments is adopted.

[0071] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A flat wire winding stator assembly, matched with a 6-pole rotor, characterized in that: The stator assembly includes a stator core and a stator winding. The stator core is provided with 54 stator slots. The stator winding is arranged in the stator slots, and the number of layers is N, wherein N≥3 and N is an odd number. The stator winding is a three-phase symmetrical full-pitch stator winding, including a hairpin end and a welding end. The hairpin end has a span of 8 stator slots or 11 stator slots, and the welding end has a span of 9 stator slots. One phase of the stator winding includes multiple symmetrical branches, and the branches are connected in series or in parallel.

2. A flat wire winding stator assembly according to claim 1, characterized in that: The span of the hairpin end is 11 stator slots, 8 stator slots and 8 stator slots, which are circulated in sequence. The span of the hairpin end and the welding end of the stator winding is 11 stator slots and 9 stator slots, 8 stator slots and 9 stator slots, and 8 stator slots and 9 stator slots, which are circulated in sequence until the stator winding is arranged in the stator slots.

3. A flat wire winding stator assembly according to claim 2, characterized in that: The number of stator slot layers is 5, and one phase of the stator winding includes 3 branches or 1 branch.

4. The flat wire winding stator assembly according to claim 2, characterized in that: The number of stator slot layers is 7, and one phase of the stator winding includes 3 branches or 1 branch.

5. The flat wire winding stator assembly according to claim 1, characterized in that: The stator assembly also includes a welding end copper bar, which includes a parallel copper bar and a series copper bar, and multiple symmetrical branches of one phase of the stator winding are connected in parallel or in series through the parallel copper bar and the series copper bar.

6. The flat wire winding stator assembly according to claim 5, characterized in that: One phase of the stator winding includes three branches, and the three branches are connected in parallel through the parallel copper bar to form a three-branch arrangement structure of the stator winding.

7. The flat wire winding stator assembly according to claim 5, characterized in that: One phase of the stator winding includes three branches, and one main branch is obtained by connecting the three branches in series through the series copper bar or welding the three branches head to tail to form a branch arrangement structure of the stator winding.

8. The flat wire winding stator assembly according to claim 1, characterized in that: The stator winding has a U-shaped line, including an 11-stator slot span line and an 8-stator slot span line.

9. The flat wire winding stator assembly according to claim 1, characterized in that: The three-phase stator winding is arranged by rotating one phase in two directions by 120 electrical degrees, and the three-phase winding is connected in star or triangle.

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

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