Armature windings and motor
By setting 108 winding slots on the stator core and designing two parallel branches for each phase winding, which run along the adjacent layers of the winding slots, the problem of increased production costs caused by the complex winding structure is solved, and the concentration of winding leads and simplification of busbars are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GEZHIQU INTELLIGENT TECHNOLOGY (SHANGHAI) CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-07-17
AI Technical Summary
The existing flat wire motor winding structure is complex, which leads to a complex busbar topology and increases production costs.
The stator core has 108 winding slots. Each phase winding includes two parallel branches. The first and second branches reciprocate along the circumference of the stator core in adjacent layers of the winding slots. The lead-out ends are located in the same layer of adjacent winding slots, simplifying the busbar structure.
This approach concentrates the winding lead positions, simplifies the busbar structure, and reduces production costs.
Smart Images
Figure CN224520812U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to an armature winding and a motor. Background Technology
[0002] Flat wire motors are increasingly being used in the drive systems of new energy vehicles due to their advantages in improving the voltage resistance of the windings and reducing the length of the winding ends.
[0003] Existing motors mainly employ wave winding or lap winding structures. By designing the flat wire conductors in the winding structure to have multiple layers, the AC resistance of the motor can be effectively reduced. However, as the number of flat wire conductor layers increases, the wiring method of the winding structure becomes increasingly complex, resulting in the dispersed positions of the winding leads. This leads to a complex subsequent bus topology, increasing the production cost of the motor. Utility Model Content
[0004] The main purpose of this invention is to propose an armature winding and motor that concentrates the winding lead positions, which helps to simplify the busbar structure and control production costs.
[0005] To achieve the above objectives, this utility model proposes an armature winding, the armature winding comprising:
[0006] Stator core, wherein the stator core is provided with 108 winding slots; and
[0007] The stator winding includes multiple flat wire conductors disposed in the winding slots. Each winding slot has four layers of conductors. The multiple flat wire conductors are connected to form a three-phase winding. Each phase winding includes a first branch and a second branch connected in parallel. The first branch and the second branch each have an input end and an output end. The first branch and the second branch are formed by reciprocating along the circumference of the stator core in adjacent layers of the winding slot from the input end to the output end. The output ends of the first branch and the second branch are located in the same layer of adjacent winding slots.
[0008] In one embodiment, x and y are defined as the y-th layer of the x-th winding slot, where x∈[1,108] and y∈[a,d], and the layer order of the winding slot from the inside to the outside is a, b, c, d;
[0009] The path of the first branch is:
[0010] 1d-6c-13d-18c-25d-30c-37d-42c-49d-54c-61d-66c-73d-78c-85d-90c-89d-102c- 1b-6a-13b-18a-25b-30a-37b-42a-49b-54a-61b-66a-73b-78a-85b-90a-89b-102a-1 a-104b-97a-92b-85a-80b-73a-68b--61a-56b-49a-44b-37a-32b-25a-20b-13a-8b- 1c-104d-97c-92d-85c-80d-73c-68d--61c-56d-49c-44d-37c-32d-25c-20d-13c-8d;
[0011] The path of the second branch is:
[0012] 2d-7c-14d-19c-26d-31c-38d-43c-50d-55c-62d-67c-74d-79c-86d-91c-98d-103c-2 b-7a-14b-19a-26b-31a-38b-43a-50b-55a-62b-67a-74b-79a-86b-91a-98b-103a-10 8a-103b-96a-91b-84a-79b-72a-67b-60a-55b-48a-43b-36a-31b-24a-19b-12a-7b-1 08c-103d-96c-91d-84c-79d-72c-67d-60c-55d-48c-43d-36c-31d-24c-19d-12c-7d.
[0013] In one embodiment, the inlet end of the first branch and the inlet end of the second branch are located in the same layer of adjacent winding slots, and the inlet end and the outlet end are located in the same layer of different winding slots.
[0014] In one embodiment, the three-phase winding includes a U-phase winding, a V-phase winding, and a W-phase winding, wherein the U-phase winding includes the first branch and the second branch;
[0015] The V-phase winding is obtained by rotating the U-phase winding by 4 slots relative to the winding slot size in the direction of increasing slot size.
[0016] The W-phase winding is obtained by rotating the U-phase winding by 8 slots relative to the winding slot size in the direction of increasing slot size.
[0017] In one embodiment, the first branch includes a first part and a second part connected together, the starting end of the first part being the inlet end of the first branch, and the ending end of the second part being the outlet end of the first branch.
[0018] The first part and the second part each include a plurality of flat wire conductors, which are sequentially welded together. The flat wire conductors pass sequentially through adjacent layers of different winding grooves. The end of the first part and the beginning of the second part are located in the same layer of different winding grooves and are connected by welding.
[0019] In one embodiment, the second branch includes a connected third part and a fourth part, wherein the starting end of the third part is the inlet end of the second branch, and the ending end of the fourth part is the outlet end of the second branch.
[0020] The third part and the fourth part each include a plurality of flat wire conductors, which are sequentially welded together. The flat wire conductors pass sequentially through adjacent layers of different winding grooves. The end of the third part and the beginning of the fourth part are located in the same layer of different winding grooves and are connected by welding.
[0021] In one embodiment, the flat conductor is a hairpin flat conductor.
[0022] This utility model also proposes an electric motor, which includes the armature winding as described above.
[0023] In the technical solution of this utility model, the stator core is provided with 108 winding slots. The 108 winding slots are arranged at intervals along the circumference of the stator core and extend along the axial direction of the stator core, penetrating the end wall of the stator core. Each phase winding includes two parallel branches. The first branch and the second branch both have an inlet end and an outlet end. The first branch and the second branch are formed by the inlet end reciprocating along the circumference of the stator core in adjacent layers of the winding slots to the outlet end. The outlet ends of the first branch and the second branch are located in the same layer of different winding slots, and the outlet ends of the first branch and the second branch are separated by one winding slot. This concentrates the outlet positions of the armature winding, which helps to simplify the busbar structure and reduce production costs. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0025] Figure 1 A schematic diagram of the U-phase winding in Embodiment 1 of the armature winding provided by this utility model;
[0026] Figure 2 A schematic diagram of the first part of the U-phase first branch winding in Embodiment 1 of the armature winding provided by this utility model;
[0027] Figure 3 A schematic diagram of the second part of the U-phase first branch winding in Embodiment 1 of the armature winding provided by this utility model;
[0028] Figure 4 A schematic diagram of the first part of the U-phase second branch winding in Embodiment 1 of the armature winding provided by this utility model;
[0029] Figure 5 This is a schematic diagram of the second part of the second branch of the U-phase winding in Embodiment 1 of the armature winding provided by this utility model.
[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0031] 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 scope of protection of the present utility model.
[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0034] This utility model proposes an armature winding, which includes a stator core and a stator winding. The stator core has 108 winding slots. The stator winding includes multiple flat wire conductors disposed in the winding slots. Each winding slot has 4 layers of conductors. The multiple flat wire conductors are connected to form a three-phase winding. Each phase winding includes a first branch and a second branch connected in parallel. The first branch and the second branch both have an input end and an output end. The first branch and the second branch are formed by reciprocating along the circumference of the stator core from the input end to the output end in adjacent layers of the winding slot. The output ends of the first branch and the second branch are located in the same layer of adjacent winding slots.
[0035] In this embodiment, the stator core has 108 winding slots, which are spaced apart circumferentially along the stator core and extend axially along the stator core, penetrating the end wall of the stator core. Each phase winding includes two parallel branches. The lead-out ends of the first branch and the second branch are located in the same layer of different winding slots, and the lead-out ends of the first branch and the second branch are separated by one winding slot. This concentrates the lead-out positions of the armature winding, which helps to simplify the busbar structure and reduce production costs.
[0036] In this embodiment, the flat wire conductor has 4 layers. In actual implementation, even-numbered flat wire conductor armature windings with 6, 8, or 10 layers can be achieved by increasing the number of layers of cross-wires.
[0037] Figures 1 to 5 In the diagram, solid lines represent connections at the card-issuing end, and dashed lines represent connections at the welding end.
[0038] Example 1:
[0039] In one embodiment, x and y are defined as the y-th layer of the x-th winding slot, where x∈[1,108] and y∈[a,d], and the layer order of the winding slots from the inside to the outside is a, b, c, d respectively;
[0040] The path of the first branch is:
[0041] 1d-6c-13d-18c-25d-30c-37d-42c-49d-54c-61d-66c-73d-78c-85d-90c-89d-102c- 1b-6a-13b-18a-25b-30a-37b-42a-49b-54a-61b-66a-73b-78a-85b-90a-89b-102a-1 a-104b-97a-92b-85a-80b-73a-68b--61a-56b-49a-44b-37a-32b-25a-20b-13a-8b- 1c-104d-97c-92d-85c-80d-73c-68d--61c-56d-49c-44d-37c-32d-25c-20d-13c-8d;
[0042] The path of the second branch is:
[0043] 2d-7c-14d-19c-26d-31c-38d-43c-50d-55c-62d-67c-74d-79c-86d-91c-98d-103c-2 b-7a-14b-19a-26b-31a-38b-43a-50b-55a-62b-67a-74b-79a-86b-91a-98b-103a-10 8a-103b-96a-91b-84a-79b-72a-67b-60a-55b-48a-43b-36a-31b-24a-19b-12a-7b-1 08c-103d-96c-91d-84c-79d-72c-67d-60c-55d-48c-43d-36c-31d-24c-19d-12c-7d.
[0044] In this embodiment, as Figure 1As shown, the inlet of the first branch is in the d-th layer of the first winding slot, and the outlet of the first branch is in the d-th layer of the 8th winding slot. The inlet of the second branch is in the d-th layer of the 2nd winding slot, and the outlet of the second branch is in the d-th layer of the 7th winding slot. This arrangement ensures that the inlet of the first branch and the inlet of the second branch are located in two adjacent winding slots, and the outlet of the first branch and the outlet of the second branch are located in two adjacent winding slots. The inlet and outlet of the first branch and the inlet and outlet of the second branch are located in the same layer of different winding slots, and this layer is the outermost layer of the winding slot. This results in a simple armature winding structure, good manufacturability, and facilitates the simplification of the busbar structure, laying a solid foundation for cost control.
[0045] In this embodiment, the first branch includes a first part and a second part connected together, and the winding of the first part is as follows: Figure 2 As shown, the second part of the winding is as follows Figure 3 As shown, the starting end of the first part is the inlet end of the first branch, and the ending end of the second part is the outlet end of the first branch. In both the first and second parts, the portion of the flat wire conductor that passes through the winding slot is located in adjacent layers of different winding slots. In the first part, the portion of the flat wire conductor that passes through the winding slot starts at the inlet end, the first winding slot, the d-th layer, and is wound once along the circumference of the stator core, alternating between layers d and c of the winding slot. Then, it is wound once along the circumference of the stator core, alternating between layers b and a of the winding slot, before reaching the outlet end, the 102nd winding slot, the a-th layer. In the second part, the portion of the flat wire conductor that passes through the winding slot starts at the inlet end, the first winding slot, the a-th layer, and is wound once along the circumference of the stator core, alternating between layers a and b of the winding slot. Then, it is wound once along the circumference of the stator core, alternating between layers c and d of the winding slot, before reaching the outlet end, the 8th winding slot, the d-th layer.
[0046] The second branch includes the connecting third and fourth parts, and the winding of the third part is as follows: Figure 4 As shown, the winding of the fourth part is as follows Figure 5 As shown, the starting end of the third part is the inlet end of the second branch, and the ending end of the second part is the outlet end of the second branch. In both the third and fourth parts, the portion of the flat conductor that enters the winding slot is located in adjacent layers of different winding slots. In the third part, the flat conductor's entry portion starts at the inlet end, the d-th layer of the second winding slot, and is wound once along the circumference of the stator core, alternating between layers d and c of the winding slot. Then, it is wound once along the circumference of the stator core, alternating between layers b and a of the winding slot, before reaching the outlet end, the a-th layer of the 103 winding slot. In the fourth part, the flat conductor's entry portion starts at the starting end, the a-th layer of the 108 winding slot, and is wound once along the circumference of the stator core, alternating between layers a and b of the winding slot. Then, it is wound once along the circumference of the stator core, alternating between layers c and d of the winding slot, before reaching the outlet end, the d-th layer of the 7th winding slot.
[0047] Understandably, the first and second branches traverse the available phase bands and winding slot layers to ensure potential balance and prevent circulating currents. In this embodiment, the number of poles is 6, and the pitch of the flat wire conductors in the first and second branches is mostly 11 to reduce the 11th and 13th harmonics of the armature winding. The uniform span of most flat wire conductors reduces the number of hairpin flat wire types used, facilitating automated armature winding production and cost reduction.
[0048] In one embodiment, the inlet end of the first branch and the inlet end of the second branch are located in the same layer of adjacent winding slots, and the inlet end and the outlet end are located in the same layer of different winding slots. For example, 4d refers to the d-th layer of the 4th winding slot.
[0049] In one embodiment, the three-phase winding includes a U-phase winding, a V-phase winding, and a W-phase winding. The U-phase winding includes a first branch and a second branch. The V-phase winding is obtained by rotating the U-phase winding by 4 slots relative to the U-phase winding in the direction of increasing winding slot position. The W-phase winding is obtained by rotating the U-phase winding by 8 slots relative to the U-phase winding in the direction of increasing winding slot position.
[0050] In this embodiment, the U-phase winding, the V-phase sleeve, and the lead-out ends of the U-phase winding are all located on the same layer of different winding slots, and the lead-out ends of different branches in the same phase winding are located on the same layer of adjacent windings. This simplifies the busbar structure of the armature winding and helps reduce the production cost of the motor.
[0051] In one embodiment, the first branch includes a first part and a second part connected together. The starting end of the first part is the inlet end of the first branch, and the ending end of the second part is the outlet end of the first branch. Each of the first part and the second part includes multiple flat wire conductors, which are sequentially welded together. The starting and ending ends of each flat wire conductor pass through adjacent layers of different winding slots. The ending end of the first part and the starting end of the second part are located in the same layer of different winding slots and are connected by welding.
[0052] In one embodiment, the second branch includes a connected third part and a fourth part. The starting end of the third part is the inlet end of the second branch, and the ending end of the fourth part is the outlet end of the second branch. Both the third part and the fourth part include multiple flat wire conductors, which are sequentially welded together. The starting and ending ends of each flat wire conductor pass through adjacent layers of different winding slots. The ending end of the third part and the starting end of the fourth part are located in the same layer of different winding slots and are connected by welding.
[0053] Specifically, the flat conductor is a hairpin flat wire or an I-shaped flat wire, such as... Figures 1 to 5In the diagram, xn, xn is a hairpin, yn, yn is a hairpin, an, an is a hairpin, bn, bn is a hairpin, where n∈[1,18]; for example, x1, x1 is a hairpin. an, an are hairpins of the first part of the first branch, bn, bn are hairpins of the second part of the first branch, xn, xn are hairpins of the first part of the second branch, yn, yn are hairpins of the second part of the second branch. a18, a18 hairpin is connected to b18, b18 hairpin, x18, x18 hairpin is connected to y18, y18 hairpin. a0 is the inlet of the first branch, b0 is the outlet of the first branch, x0 is the inlet of the second branch, and y0 is the outlet of the second branch. a0, b0, x0, y0 can be I-shaped flat lines.
[0054] In one embodiment, the flat conductor is a hairpin flat wire.
[0055] In this embodiment, the hairpin flat wire includes a straight portion passing through the winding groove and a connecting portion and a bending portion at both ends of the straight portion. The two straight portions are connected by the connecting portion to form a flat wire conductor. The two branches have a bending portion at the end away from the connecting portion. The bending portion is bent towards the side of the straight portion away from the connecting portion. When the flat wire conductor is inserted into the winding groove, the connecting portion forms the hairpin end of the armature winding, and the bending portion forms the welding end of the armature winding.
[0056] In practice, the flat conductor can be inserted into the winding groove, and then the end of the flat conductor can be bent to form a bend. The bend of one flat conductor is bent toward another flat conductor connected to it. No specific limitation is made here.
[0057] In summary, the armature winding proposed in this invention is beneficial for improving the slot fill factor of the motor, thereby generating a higher magnetic field strength, increasing the motor power, balancing the potential of each branch, eliminating circulating current problems, and having a simple winding structure with good manufacturability. The concentrated position of the winding leads helps to simplify the busbar structure and lays a good foundation for cost control. At the same time, the short-pitch design of most conductors helps to reduce harmonics and improve NVH.
[0058] This utility model also proposes an electric motor, which includes an armature winding. The specific structure of the armature winding is as described in the above embodiments. Since this electric motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0059] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. An armature winding, characterized in that, The armature winding includes: Stator core, wherein the stator core is provided with 108 winding slots; and The stator winding includes a plurality of flat wire conductors disposed in the winding slots. Each winding slot has four layers of conductors. The plurality of flat wire conductors are connected to form a three-phase winding. Each phase winding includes a first branch and a second branch connected in parallel. The first branch and the second branch each have an inlet end and an outlet end. The first branch and the second branch are formed by reciprocating along the circumference of the stator core in adjacent layers of the winding slot from the inlet end to the outlet end. The outlet ends of the first branch and the second branch are located in the same layer of adjacent winding slots. The second branch includes a third part and a fourth part that are connected. The starting end of the third part is the inlet end of the second branch, and the ending end of the fourth part is the outlet end of the second branch. The third part and the fourth part each include a plurality of flat wire conductors, which are sequentially welded together. The flat wire conductors pass sequentially through adjacent layers of different winding grooves. The end of the third part and the beginning of the fourth part are located in the same layer of different winding grooves and are connected by welding.
2. The armature winding of claim 1, wherein, Define x and y as the y-th layer of the x-th winding slot, where x∈[1,108] and y∈[a,d], and the layer order of the winding slot from the inside to the outside is a, b, c, d; The path of the first branch is: 1d-6c-13d-18c-25d-30c-37d-42c-49d-54c-61d-66c-73d-78c-85d-90c-89d-102c- 1b-6a-13b-18a-25b-30a-37b-42a-49b-54a-61b-66a-73b-78a-85b-90a-89b-102a-1 a-104b-97a-92b-85a-80b-73a-68b--61a-56b-49a-44b-37a-32b-25a-20b-13a-8b- 1c-104d-97c-92d-85c-80d-73c-68d--61c-56d-49c-44d-37c-32d-25c-20d-13c-8d; The path of the second branch is: 2d-7c-14d-19c-26d-31c-38d-43c-50d-55c-62d-67c-74d-79c-86d-91c-98d-103c-2 b-7a-14b-19a-26b-31a-38b-43a-50b-55a-62b-67a-74b-79a-86b-91a-98b-103a-10 8a-103b-96a-91b-84a-79b-72a-67b-60a-55b-48a-43b-36a-31b-24a-19b-12a-7b-1 08c-103d-96c-91d-84c-79d-72c-67d-60c-55d-48c-43d-36c-31d-24c-19d-12c-7d.
3. The armature winding of claim 2, wherein, The inlet end of the first branch and the inlet end of the second branch are located on the same layer of adjacent winding slots, while the inlet end and the outlet end are located on the same layer of different winding slots.
4. The armature winding of claim 1, wherein, The three-phase windings include a U-phase winding, a V-phase winding, and a W-phase winding, wherein the U-phase winding includes the first branch and the second branch; The V-phase winding is obtained by rotating the U-phase winding by 4 slots relative to the winding slot size in the direction of increasing slot size. The W-phase winding is obtained by rotating the U-phase winding by 8 slots relative to the winding slot size in the direction of increasing slot size.
5. The armature winding of claim 2, wherein, The first branch includes a first part and a second part that are connected. The starting end of the first part is the inlet end of the first branch, and the ending end of the second part is the outlet end of the first branch. The first part and the second part each include a plurality of flat wire conductors, which are sequentially welded together. The flat wire conductors pass sequentially through adjacent layers of different winding grooves. The end of the first part and the beginning of the second part are located in the same layer of different winding grooves and are connected by welding.
6. The armature winding of any one of claims 1 to 5, wherein, The flat conductor is a hairpin flat wire or an I-shaped flat wire.
7. An electric machine characterized by The motor includes an armature winding as described in any one of claims 1 to 6.