Flat wire winding structure, motor stator, flat wire motor and vehicle
Patent Information
- Application Number
- CN202522619922.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-10
Smart Images
Figure CN224935464U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to flat wire winding structure, motor stator, flat wire motor and vehicle. Background Technology
[0002] Driven by the global wave of green mobility and sustainable development, the new energy vehicle industry is booming at an unprecedented pace. Among them, flat wire motors, as a core component of drive motors for new energy vehicles, are experiencing a continuous increase in market demand due to their significant advantages of high efficiency, high power density, and low energy consumption.
[0003] Flat wire motors include a flat wire winding structure, which comprises windings and a stator core. The stator core includes core slots, and the windings are wound around these slots. The flat wire winding structure can improve the slot fill factor and reduce motor copper losses, thereby increasing motor efficiency. However, flat wire windings inherently exhibit the skin effect, which is particularly pronounced in high-speed motors. To reduce the skin effect, the number of conductors in the core slots is generally increased, such as 4, 6, 8, or 10 layers.
[0004] Because the conductors of each parallel branch are distributed at different positions within the inner diameter of the iron core slots, especially when the number of slots per pole and per phase of the motor is odd and the number of branches is even, it is difficult to achieve symmetry. If the branches are asymmetrical, it will cause a potential difference and increase losses. Utility Model Content
[0005] Therefore, it is necessary to provide a flat wire winding structure, a motor stator, a flat wire motor, and a vehicle to address the problem that it is difficult to achieve symmetry in the branches of a flat wire winding.
[0006] A flat wire winding structure includes three phase windings, each phase winding including multiple parallel branches, the multiple branches being distributed in a ring-shaped symmetrical structure in the core slots of the stator core, and each branch including multiple coils arranged sequentially and connected in series on the circumferential core slots of the stator core.
[0007] The branch circuit includes multiple Class I coils and two Class II coils. The Class I coils have the same span, and the Class II coils are single coils. The winding method of each branch circuit is the same: the two Class II coils are respectively located at the innermost layer of the bottom of the iron core slot and the outermost layer of the slot opening. The multiple Class I coils are wound in a preset order from the second-to-last layer of the bottom of the iron core slot to the second-to-last layer of the slot opening, and at this time the Class I coils are located in adjacent layers of the iron core slot. Then, the next Class I coil is located at the innermost layer of the bottom of the iron core slot and the outermost layer of the bottom of the iron core slot to achieve transposition. The multiple Class I coils are then wound in a preset order, and this cycle is repeated to achieve branch circuit symmetry.
[0008] In one embodiment, the coil includes a body and a bent portion. The body includes two parallel slotted portions and a connecting portion connected to one end of the two slotted portions. The bent portion is located at the other end of the two slotted portions and forms a welded end.
[0009] In one embodiment, the two bent portions of the coil are bent toward the inside of the body.
[0010] An electric motor stator is configured as a 72-slot, 8-pole, 10-layer, 8-branch flat wire winding stator. The stator includes a stator core and a flat wire winding structure as described above. The stator core has 72 core slots circumferentially arranged, and the 72 core slots are sequentially numbered 1, 2 to 72 along the circumferential direction of the stator core. Each phase winding includes 8 parallel branches, which are respectively designated as branch A, branch B, branch C, branch D, branch E, branch F, branch G, and branch H.
[0011] The number of coil layers in each of the iron core slots increases sequentially from the bottom of the slot to the opening of the slot;
[0012] The lead wire of the first branch A is on the innermost coil of the 1+6N slot, and the center point is on the outermost coil of the 11+6N slot.
[0013] The lead wire of the second branch B is on the outermost coil of the 20+6N slot, and the center point is on the innermost coil of the 10+6N slot.
[0014] The lead wire of the third branch C is on the innermost coil of the 19+6N slot, and the center point is on the outermost coil of the 29+6N slot.
[0015] The lead wire of the fourth branch D is on the outermost coil of the 38+6N slot, and the center point is on the innermost coil of the 28+6N slot.
[0016] The lead wire of the fifth branch E is on the innermost coil of the 37+6N slot, and the center point is on the outermost coil of the 47+6N slot.
[0017] The lead wire of the sixth branch F is on the outermost coil of the 56+6N slot, and the center point is on the innermost coil of the 46+6N slot.
[0018] The lead wire of the seventh branch G is on the innermost coil of the 55+6N slot, and the center point is on the outermost coil of the 65+6N slot.
[0019] The lead wire of the eighth branch H is on the outermost coil of the 2+6N slot, and the center point is on the innermost coil of the 64+6N slot, where N is 0, 1 or 2.
[0020] In one embodiment, the lead wires of each branch and the coil where the center point is located are type II coils.
[0021] In one embodiment, the type of coil includes a body and a bent portion. The body includes two parallel slotted portions and a connecting portion connected to one end of the two slotted portions. The bent portion is located at the other end of the two slotted portions and forms a welded end.
[0022] The first branch A includes coils A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16;
[0023] The second branch B includes coils B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16;
[0024] The third branch C includes coils C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, and C16;
[0025] The fourth branch D includes coils D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, and D16;
[0026] The fifth branch E includes coils E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, and E16;
[0027] The sixth branch F includes coils F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15, and F16;
[0028] The seventh branch G includes coils G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G15, and G16;
[0029] The eighth branch H includes coils H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14, H15, and H16;
[0030] Each of the aforementioned iron core slots has 10 layers, which are numbered from the inside out as layer 1, layer 2 to layer 10;
[0031] A1 is located in the first layer of the 1+6N slot, B1 is located in the tenth layer of the 20+6N slot, C1 is located in the first layer of the 19+6N slot, D1 is located in the tenth ground layer of the 38+6N slot, E1 is located in the first layer of the 37+6N slot, F1 is located in the tenth layer of the 56+6N slot, G1 is located in the first layer of the 55+6N slot, H1 is located in the tenth layer of the 2+6N slot, and A1 is 6 bits. In the 10th layer of the 11+6N slot, B16 is located in the 1st layer of the 10+6N slot, C16 is located in the 10th layer of the 29+6N slot, D16 is located in the 1st layer of the 28+6N slot, E16 is located in the 10th layer of the 47+6N slot, F16 is located in the 1st layer of the 46+6N slot, G16 is located in the 10th layer of the 65+6N slot, and H16 is located in the 1st layer of the 64+6N slot;
[0032] A1, B1, C1, D1, E1, F1, G1, and H1 are the coils where the lead wires are located, and A16, B16, C16, D16, E16, F16, G16, and H16 are the coils where the center point is located.
[0033] In one embodiment, the winding method of the first branch A is as follows:
[0034] A1 is located in the first layer of the first slot; one through-slot of A2 is located in the third layer of the first slot, and the other through-slot extends to the second layer of the ninth slot; one through-slot of A3 is located in the fifth layer of the first slot, and the other through-slot extends to the fourth layer of the ninth slot; one through-slot of A4 is located in the seventh layer of the first slot, and the other through-slot extends to the sixth layer of the ninth slot; one through-slot of A5 is located in the ninth layer of the first slot, and the other through-slot extends to the eighth layer of the ninth slot; one through-slot of A6 is located in the first layer of the second slot, and the other through-slot extends to the tenth layer of the ninth slot; one through-slot of A7 is located in the third layer of the second slot, and the other through-slot extends to the second layer of the tenth slot; one through-slot of A8 is located in the fifth layer of the second slot, and the other through-slot extends to the fourth layer of the tenth slot; one through-slot of A9... The through-slot portion is located in the 7th layer of the 2nd slot, and the other through-slot portion spans to the 6th layer of the 10th slot; one through-slot portion of A10 is located in the 9th layer of the 2nd slot, and the other through-slot portion spans to the 8th layer of the 10th slot; one through-slot portion of A11 is located in the 1st layer of the 3rd slot, and the other through-slot portion spans to the 10th layer of the 10th slot; one through-slot portion of A12 is located in the 3rd layer of the 3rd slot, and the other through-slot portion spans to the 2nd layer of the 11th slot; one through-slot portion of A13 is located in the 5th layer of the 3rd slot, and the other through-slot portion spans to the 4th layer of the 11th slot; one through-slot portion of A14 is located in the 7th layer of the 3rd slot, and the other through-slot portion spans to the 6th layer of the 11th slot; one through-slot portion of A15 is located in the 9th layer of the 3rd slot, and the other through-slot portion spans to the 8th layer of the 11th slot; A16 is located in the 10th layer of the 11th slot;
[0035] A1 is connected to A2 at the welding end; A2 is connected to A3 at the welding end; A3 is connected to A4 at the welding end; A4 is connected to A5 at the welding end; A5 is connected to A6 at the welding end; A6 is connected to A7 at the welding end; A7 is connected to A8 at the welding end; A8 is connected to A9 at the welding end; A9 is connected to A10 at the welding end; A10 is connected to A11 at the welding end; A11 is connected to A12 at the welding end; A12 is connected to A13 at the welding end; A13 is connected to A14 at the welding end; A14 is connected to A15 at the welding end; A15 is connected to A16 at the welding end.
[0036] The winding method of each branch is the same.
[0037] In one embodiment, the center points of each coil are connected by a copper busbar.
[0038] A flat wire motor, comprising a motor stator as described above.
[0039] A vehicle comprising a flat wire motor as described above.
[0040] In the aforementioned flat wire winding structure, each branch has the same winding method, meaning each branch coil is wound from the inside out in the same direction. Each layer of coils has the same span, and the upper and lower edges of the coils in the middle layers are located in the core slots of adjacent layers. Transposition is achieved by crossing the outermost and innermost layers of the core slots, eliminating phase differences between different branches and ensuring symmetry in both the slots and layers. Multiple parallel branches are distributed in a ring-shaped symmetrical structure within the core slots, thus achieving a uniform and symmetrical distribution of the windings in each phase. This results in balanced potentials in each branch, no circulating current, and harmonic cancellation, significantly improving motor performance. Furthermore, compared to transposition within the same layer using coils with different spans, this flat wire winding structure uses coils with the same span to cross the outermost and innermost layers for transposition. Insertion does not require layer-wise avoidance, making coil insertion into the core slots simpler and preventing the flat wire winding structure from expanding outwards after being wound into the core slots. Attached Figure Description
[0041] Figure 1 This is a schematic diagram of a flat wire winding structure provided in an embodiment of the present invention.
[0042] Figure 2 This is a schematic diagram of a branch provided in an embodiment of the present invention.
[0043] Figure 3 This is a schematic diagram of a type of coil provided in an embodiment of the present invention.
[0044] Figure 4 This is a schematic diagram of two types of coils provided in one embodiment of the present invention.
[0045] Figure 5 This is a winding development diagram of the flat wire winding structure of the motor stator provided in an embodiment of the present invention.
[0046] Figure 6 This is a schematic diagram of the first branch A provided in an embodiment of the present invention.
[0047] Figure 7 This is a schematic diagram of a motor stator provided in one embodiment of the present invention.
[0048] The above figures include the following reference numerals:
[0049] 1. Flat wire winding structure; 11. Branch circuit; 111. Type I coil; 1111. Through slot; 1112. Connecting part; 1113. Bending part; 112. Type II coil;
[0050] 2. Stator core; 21. Core slot. Detailed Implementation
[0051] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0056] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0057] like Figure 1 , Figure 2 As shown, some embodiments of this application provide a flat wire winding structure 1, including a three-phase winding. Each phase winding includes multiple parallel branches 11. The multiple branches 11 are symmetrically distributed in a ring within the core slots 21 of the stator core 2. Each branch 11 includes multiple coils arranged sequentially and connected in series on the circumferential core slots 21 of the stator core 2. Each branch 11 includes multiple Class I coils 111 and two Class II coils 112. The Class I coils 111 have the same span, and the Class II coils 112 are single coils. The winding method of each branch 11 is the same: two Class II coils... Coils 112 are respectively set in the innermost layer of the bottom of the iron core slot 21 and the outermost layer of the slot opening of the iron core slot 21. Multiple type I coils 111 are wound from the second bottom layer of the bottom of the iron core slot 21 to the second outermost layer of the slot opening of the iron core slot 21 in a preset order. At this time, type I coils 111 are located in adjacent layers of the iron core slot 21. Then, one type I coil 111 is located in the innermost layer of the bottom of the iron core slot 21 and the outermost layer of the bottom of the iron core slot 21 to realize the interchange. Multiple type I coils 111 are wound in the same preset order, and so on, to achieve the symmetry of branch 11.
[0058] This flat wire winding structure 1 includes three phase windings, each phase winding includes multiple parallel branches 11. Each branch 11 uses a type II coil 112 as the winding start and winding end. Multiple type I coils 111 are wound from the bottom of the slot to the outermost layer of the slot opening of the iron core slot 21 in a preset order. Then, they are transposed by a type I coil 111 located at the innermost layer of the slot bottom and the outermost layer of the slot bottom of the iron core slot 21, and then the cycle continues to achieve symmetry of the branch 11.
[0059] In this embodiment of the flat wire winding structure 1, each branch 11 has the same winding method, that is, the coil of each branch 11 is wound from the inside out in the same direction, each layer of coil has the same span, and the upper and lower edges of the coils in the middle layers are located in the iron core slots 21 of the adjacent layers respectively. Then, by transposing the coils across the outermost and innermost layers of the iron core slots 21, the phase difference between different branches 11 is eliminated, ensuring that each branch 11 is symmetrical in the slot and in the layer. Multiple parallel branches 11 are distributed in a ring symmetrical structure in the iron core slots 21, thereby realizing the uniform and symmetrical distribution of each phase winding, so that the potential of each branch 11 is balanced, there is no circulating current, and harmonics are canceled, which greatly improves the performance of the motor. Furthermore, compared to using coils with different spans for transposition within the same layer, this flat wire winding structure 1 uses coils with the same span to cross the outermost and innermost layers for transposition. There is no need for interlayer avoidance during insertion, making it easier to insert the coil into the iron core slot 21 and preventing the flat wire winding structure 1 from expanding outward after being wound into the iron core slot 21.
[0060] It should be noted that the specific value of the span depends on the actual needs, and this embodiment does not limit it. For example, for the 72-slot, 8-pole, 10-layer, 8-branch flat wire winding structure 1, the span is 8, which can ensure that the current is small, the efficiency is high, the harmonics are small, and the overall rotational noise is small.
[0061] like Figure 3 , Figure 4As shown, optionally, a type 1 coil 111 includes a main body and a bent portion 1113. The main body includes two parallel slotted portions 1111 and a connecting portion 1112 connected to one end of the two slotted portions 1111. The bent portion 1113 is located at the other end of the two slotted portions 1111 and forms a welding end. During slotting, the two slotted portions 1111 of the type 1 coil 111 are located in adjacent layers, or the two slotted portions 1111 of the type 1 coil 111 are located in the outermost and innermost layers, respectively. The connecting portion 1112 is V-shaped or arc-shaped, so that the coil body is U-shaped or V-shaped. Since this branch 11 coil includes only two types, namely type 1 coil 111 and type 2 coil 112, irregularly shaped coils and bridging coils are eliminated, reducing the types of coils, thereby facilitating assembly and mass production, improving production efficiency, reducing wiring difficulty, and requiring fewer molds, thus reducing production costs.
[0062] Optionally, the two bends 1113 of a type of coil 111 are bent toward the inside of the main body.
[0063] like Figures 5-7 As shown, some embodiments of this application provide a motor stator configured as a 72-slot, 8-pole, 10-layer, 8-branch flat wire winding motor stator. This motor stator includes a stator core 2 and the aforementioned flat wire winding structure 1. The stator core 2 has 72 core slots 21 circumferentially arranged, and these 72 core slots 21 are sequentially numbered 1, 2, to 72 in a clockwise direction along the circumference of the stator core 2. Each phase winding includes 8 parallel branches 11, respectively... Let the branches be: Branch A (first branch), Branch B (second branch), Branch C (third branch), Branch D (fourth branch), Branch E (fifth branch), Branch F (sixth branch), Branch G (seventh branch), and Branch H (eighth branch). The number of coil layers in each core slot 21 increases sequentially from the bottom to the top of the slot. The lead of Branch A is on the innermost coil of slot 1+6N, and its center point is on the outermost coil of slot 11+6N. The lead of Branch B is on the outermost coil of slot 20+6N, and its center point is on the... The innermost coil of the 10+6N slot, the lead of the third branch C is on the innermost coil of the 19+6N slot, and the center point is on the outermost coil of the 29+6N slot; the lead of the fourth branch D is on the outermost coil of the 38+6N slot, and the center point is on the innermost coil of the 28+6N slot; the lead of the fifth branch E is on the innermost coil of the 37+6N slot, and the center point is on the outermost coil of the 47+6N slot; the lead of the sixth branch F is on the outermost coil of the 56+6N slot, and the center point is on the innermost coil of the 46+6N slot; the lead of the seventh branch G is on the innermost coil of the 55+6N slot, and the center point is on the outermost coil of the 65+6N slot; the lead of the eighth branch H is on the outermost coil of the 2+6N slot, and the center point is on the innermost coil of the 64+6N slot. N is 0, 1, or 2.
[0064] In the stator of this motor, the number of coil layers in each core slot 21 increases sequentially from the bottom to the top of the slot. The lead wire of the first branch A is on the innermost coil of slot 1+6N, and its center point is on the outermost coil of slot 11+6N. The lead wire of the second branch B is on the outermost coil of slot 20+6N, and its center point is on the innermost coil of slot 10+6N. The lead wire of the third branch C is on the innermost coil of slot 19+6N, and its center point is on the outermost coil of slot 29+6N. The lead wire of the fourth branch D is on the outermost coil of slot 38+6N, and its center point is on the innermost coil of slot 10+6N. The lead wire of the fifth branch E is located on the innermost coil of the 28+6N slot, and its center point is located on the outermost coil of the 37+6N slot. The lead wire of the sixth branch F is located on the outermost coil of the 56+6N slot, and its center point is located on the innermost coil of the 46+6N slot. The lead wire of the seventh branch G is located on the innermost coil of the 55+6N slot, and its center point is located on the outermost coil of the 65+6N slot. The lead wire of the eighth branch H is located on the outermost coil of the 2+6N slot, and its center point is located on the innermost coil of the 64+6N slot. To ensure proper spacing between the lead wires and the center point, the lead wires and center points of each branch 11 in each phase are located in different slots and on either the outermost or innermost layer, with a considerable distance between them. This avoids a large potential difference between the lead wires and the center point, preventing breakdown.
[0065] Optionally, the coil containing the lead and the center point is a Class II coil 112.
[0066] Specifically, the first branch A includes coils A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16; the second branch B includes coils B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16; the third branch C includes coils C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, and C16; and the fourth branch D includes coils D1, D2, D3, D4, D5, and D6. 6. D7, D8, D9, D10, D11, D12, D13, D14, D15, D16; the fifth branch E includes coils E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, E16; the sixth branch F includes coils F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15, F16; the seventh branch G includes coils G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G... 15, G16, the eighth branch H includes coils H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14, H15, H16; each core slot 21 has 10 layers, numbered from the inside out as layer 1, layer 2 to layer 10. A1 is located in the first layer of slot 1+6N, B1 is located in the tenth layer of slot 20+6N, C1 is located in the first layer of slot 19+6N, D1 is located in the tenth layer of slot 38+6N, E1 is located in the first layer of slot 37+6N, F1 is located in the tenth layer of slot 56+6N, G1 is located in the first layer of slot 55+6N, and H1 is located in the tenth layer of slot 19+6N. The coils are located in the 10th layer of slot 2+6N. A16 is located in the 10th layer of slot 11+6N, B16 in the 1st layer of slot 10+6N, C16 in the 10th layer of slot 29+6N, D16 in the 1st layer of slot 28+6N, E16 in the 10th layer of slot 47+6N, F16 in the 1st layer of slot 46+6N, G16 in the 10th layer of slot 65+6N, and H16 in the 1st layer of slot 64+6N. A1, B1, C1, D1, E1, F1, G1, and H1 are the coils containing the lead wires, while A16, B16, C16, D16, E16, F16, G16, and H16 are the coils containing the center point. N is 0, 1, or 2.
[0067] The winding method of each branch 11 is the same, such as... Figure 6As shown, the following example uses the winding method of the first branch: A1 is located in the first layer of the first slot; one through-slot portion 1111 of A2 is located in the third layer of the first slot, and the other through-slot portion 1111 spans to the second layer of the ninth slot; one through-slot portion 1111 of A3 is located in the fifth layer of the first slot, and the other through-slot portion 1111 spans to the fourth layer of the ninth slot; one through-slot portion 1111 of A4 is located in the seventh layer of the first slot, and the other through-slot portion 1111 spans to the sixth layer of the ninth slot; one through-slot portion 1111 of A5 is located in the ninth layer of the first slot, and the other through-slot portion 1111 spans to the eighth layer of the ninth slot; one through-slot portion 1111 of A6 is located in the... 2. One through slot 1111 extends to the 10th layer of the 9th slot; A7. One through slot 1111 is located in the 3rd layer of the 2nd slot, and another through slot 1111 extends to the 2nd layer of the 10th slot; A8. One through slot 1111 is located in the 5th layer of the 2nd slot, and another through slot 1111 extends to the 4th layer of the 10th slot; A9. One through slot 1111 is located in the 7th layer of the 2nd slot, and another through slot 1111 extends to the 6th layer of the 10th slot; A10. One through slot 1111 is located in the 9th layer of the 2nd slot, and another through slot 1111 extends to the 8th layer of the 10th slot; A11. One through slot 1111 is located in... In slot A12, one through-slot 1111 is located in slot A12, layer 1; and another through-slot 1111 is located in slot A13, layer 5; and another through-slot 1111 is located in slot A14, layer 7; and another through-slot 1111 is located in slot A15, layer 9; and another through-slot 1111 is located in slot A16, layer 1; and another through-slot 1111 is located in slot A16, layer 1; and another through-slot 1111 is located in slot A12, layer 3; and another through-slot 1111 is located in slot A12, layer 3; and another through-slot 1111 is located in slot A14, layer 7; and another through-slot 1111 is located in slot A15, layer 9; and another through-slot 1111 is located in slot A16, layer 1; and another through-slot 1111 is located in slot A16, layer 1; and another through-slot 1111 is located in slot A12 ...1; 1st layer of slot 1; A1 is connected to A2 at the welding end, A2 is connected to A3 at the welding end, A3 is connected to A4 at the welding end, A4 is connected to A5 at the welding end, A5 is connected to A6 at the welding end, A6 is connected to A7 at the welding end, A7 is connected to A8 at the welding end, A8 is connected to A9 at the welding end, A9 is connected to A10 at the welding end, A10 is connected to A11 at the welding end, A11 is connected to A12 at the welding end, A12 is connected to A13 at the welding end, A13 is connected to A14 at the welding end, A14 is connected to A15 at the welding end, and A15 is connected to A16 at the welding end.
[0068] The A0 coil of the first branch is connected to the A1 coil by twist welding, the A1 coil is connected to the A2 coil by twist welding, the A2 coil is connected to the A3 coil by twist welding, and so on. The A15 coil is connected to the A16 coil by twist welding. The coil connection sequence is from layer 1 to layer 2, layer 2 to layer 3, layer 3 to layer 4, layer 4 to layer 5, layer 6 to layer 7, layer 7 to layer 8, layer 8 to layer 9, layer 9 to layer 10, and then directly jumps from layer 10 to layer 1, and so on in a cycle.
[0069] Optionally, the center points of each coil are connected via a copper busbar.
[0070] Some embodiments of this application also provide a flat wire motor including the above-described motor stator, which can be applied to electric vehicles, electric cars, pure electric vehicles, hybrid electric vehicles, range-extended electric vehicles, plug-in hybrid electric vehicles, new energy vehicles, and other vehicles.
[0071] Some embodiments of this application also provide a vehicle including the above-described flat wire motor, which may be an electric vehicle, an electric car, a pure electric vehicle, a hybrid electric vehicle, a range-extended electric vehicle, a plug-in hybrid electric vehicle, a new energy vehicle, etc.
[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0073] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A flat wire winding structure, characterized in that, It includes three-phase windings, each of which includes multiple parallel branches (11). The multiple branches (11) are distributed in a ring-shaped symmetrical structure in the core slots (21) of the stator core (2). Each branch (11) includes multiple coils arranged sequentially and connected in series on the core slots (21) of the stator core (2). The branch (11) includes multiple Class I coils (111) and two Class II coils (112). The Class I coils (111) have the same span, and the Class II coils (112) are single coils. The winding method of each branch (11) is the same: the two Class II coils (112) are respectively set at the innermost layer of the bottom of the iron core slot (21) and the outermost layer of the slot opening of the iron core slot (21). The multiple Class I coils (111) are wound in a preset order from the iron core. The bottom layer of the slot (21) is wound towards the outermost layer of the slot opening of the iron core slot (21), and at this time, the first type of coil (111) is located in the adjacent layer of the iron core slot (21). Then, the first type of coil (111) is located in the innermost layer of the bottom of the iron core slot (21) and the outermost layer of the bottom of the iron core slot (21) respectively to achieve transposition. Multiple first type of coils (111) are wound in the same preset order direction. This cycle is repeated to achieve symmetry of the branch (11).
2. The flat wire winding structure according to claim 1, characterized in that, The type of coil (111) includes a main body and a bent portion (1113). The main body includes two parallel slotted portions (1111) and a connecting portion (1112) connected to one end of the two slotted portions (1111). The bent portion (1113) is located at the other end of the two slotted portions (1111) and forms a welding end.
3. The flat wire winding structure according to claim 2, characterized in that, The two bent portions (1113) of the coil (111) are bent toward the inside of the main body.
4. A motor stator, characterized in that, The motor stator is configured as a 72-slot, 8-pole, 10-layer, 8-branch flat wire winding motor stator. The motor stator includes a stator core (2) and a flat wire winding structure (1) as described in any one of claims 1-3. The stator core (2) has 72 core slots (21) in the circumferential direction. The 72 core slots (21) are sequentially named as slot 1, slot 2 to slot 72 in clockwise order along the circumferential direction of the stator core (2). Each phase winding includes 8 parallel branches (11), which are respectively named as branch A, branch B, branch C, branch D, branch E, branch F, branch G and branch H. The number of coil layers in each of the iron core slots (21) increases sequentially from the bottom of the slot to the opening of the slot; The lead wire of the first branch A is on the innermost coil of the 1+6N slot, and the center point is on the outermost coil of the 11+6N slot. The lead wire of the second branch B is on the outermost coil of the 20+6N slot, and the center point is on the innermost coil of the 10+6N slot. The lead wire of the third branch C is on the innermost coil of the 19+6N slot, and the center point is on the outermost coil of the 29+6N slot. The lead wire of the fourth branch D is on the outermost coil of the 38+6N slot, and the center point is on the innermost coil of the 28+6N slot. The lead wire of the fifth branch E is on the innermost coil of the 37+6N slot, and the center point is on the outermost coil of the 47+6N slot. The lead wire of the sixth branch F is on the outermost coil of the 56+6N slot, and the center point is on the innermost coil of the 46+6N slot. The lead wire of the seventh branch G is on the innermost coil of the 55+6N slot, and the center point is on the outermost coil of the 65+6N slot. The lead wire of the eighth branch H is on the outermost coil of the 2+6N slot, and the center point is on the innermost coil of the 64+6N slot, where N is 0, 1 or 2.
5. The motor stator according to claim 4, characterized in that, The lead wires and the coils where the center point of each branch (11) is located are Class II coils (112).
6. The motor stator according to claim 5, characterized in that, The type of coil (111) includes a main body and a bent portion (1113). The main body includes two parallel slotted portions (1111) and a connecting portion (1112) connected to one end of the two slotted portions (1111). The bent portion (1113) is located at the other end of the two slotted portions (1111) and forms a welding end. The first branch A includes coils A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16; The second branch B includes coils B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16; The third branch C includes coils C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, and C16; The fourth branch D includes coils D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, and D16; The fifth branch E includes coils E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, and E16; The sixth branch F includes coils F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15, and F16; The seventh branch G includes coils G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G15, and G16; The eighth branch H includes coils H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14, H15, and H16; Each of the iron core slots (21) has 10 layers, which are numbered from the inside out as layer 1, layer 2 to layer 10; A1 is located in the first layer of the 1+6N slot, B1 is located in the tenth layer of the 20+6N slot, C1 is located in the first layer of the 19+6N slot, D1 is located in the tenth ground layer of the 38+6N slot, E1 is located in the first layer of the 37+6N slot, F1 is located in the tenth layer of the 56+6N slot, G1 is located in the first layer of the 55+6N slot, H1 is located in the tenth layer of the 2+6N slot, and A1 is 6 bits. In the 10th layer of the 11+6N slot, B16 is located in the 1st layer of the 10+6N slot, C16 is located in the 10th layer of the 29+6N slot, D16 is located in the 1st layer of the 28+6N slot, E16 is located in the 10th layer of the 47+6N slot, F16 is located in the 1st layer of the 46+6N slot, G16 is located in the 10th layer of the 65+6N slot, and H16 is located in the 1st layer of the 64+6N slot; A1, B1, C1, D1, E1, F1, G1, and H1 are the coils where the lead wires are located, and A16, B16, C16, D16, E16, F16, G16, and H16 are the coils where the center point is located.
7. The motor stator according to claim 6, characterized in that, The winding method of the first branch A is as follows: A1 is located in the first layer of the first slot; one through-slot (1111) of A2 is located in the third layer of the first slot, and the other through-slot (1111) extends to the second layer of the ninth slot; one through-slot (1111) of A3 is located in the fifth layer of the first slot, and the other through-slot (1111) extends to the fourth layer of the ninth slot; one through-slot (1111) of A4 is located in the seventh layer of the first slot, and the other through-slot (1111) extends to the sixth layer of the ninth slot; one through-slot (1111) of A5 is located in the first slot. The 9th layer, another through-slot (1111) spans to the 8th layer of the 9th slot; one through-slot (1111) of A6 is located in the 1st layer of the 2nd slot, and the other through-slot (1111) spans to the 10th layer of the 9th slot; one through-slot (1111) of A7 is located in the 3rd layer of the 2nd slot, and the other through-slot (1111) spans to the 2nd layer of the 10th slot; one through-slot (1111) of A8 is located in the 5th layer of the 2nd slot, and the other through-slot (1111) spans to the 4th layer of the 10th slot; one of the through-slots of A9 The through-slot (1111) is located in the 7th layer of the 2nd slot, and the other through-slot (1111) extends to the 6th layer of the 10th slot; one through-slot (1111) of A10 is located in the 9th layer of the 2nd slot, and the other through-slot (1111) extends to the 8th layer of the 10th slot; one through-slot (1111) of A11 is located in the 1st layer of the 3rd slot, and the other through-slot (1111) extends to the 10th layer of the 10th slot; one through-slot (1111) of A12 is located in the 3rd layer of the 3rd slot, and the other through-slot (1111) extends to the 6th layer of the 10th slot. 111) Spanning to the 2nd layer of the 11th slot; one of the slotting portions (1111) of A13 is located in the 5th layer of the 3rd slot, and the other slotting portion (1111) spans to the 4th layer of the 11th slot; one of the slotting portions (1111) of A14 is located in the 7th layer of the 3rd slot, and the other slotting portion (1111) spans to the 6th layer of the 11th slot; one of the slotting portions (1111) of A15 is located in the 9th layer of the 3rd slot, and the other slotting portion (1111) spans to the 8th layer of the 11th slot; A16 is located in the 10th layer of the 11th slot; A1 is connected to A2 at the welding end; A2 is connected to A3 at the welding end; A3 is connected to A4 at the welding end; A4 is connected to A5 at the welding end; A5 is connected to A6 at the welding end; A6 is connected to A7 at the welding end; A7 is connected to A8 at the welding end; A8 is connected to A9 at the welding end; A9 is connected to A10 at the welding end; A10 is connected to A11 at the welding end; A11 is connected to A12 at the welding end; A12 is connected to A13 at the welding end; A13 is connected to A14 at the welding end; A14 is connected to A15 at the welding end; A15 is connected to A16 at the welding end. The winding method of each branch (11) is the same.
8. The motor stator according to claim 4, characterized in that, The center points of each coil are connected by a copper busbar.
9. A flat wire motor, characterized in that, Includes the motor stator as described in claim 8.
10. A vehicle, characterized in that, Including the flat wire motor as described in claim 9.