Continuous wave winding structure of motor stator, motor and vehicle

Abstract

The invention provides a continuous wave winding structure of a motor stator, a motor and a vehicle, the continuous wave winding structure of the motor stator comprises an M-phase continuous wave winding, the continuous wave winding comprises a conventional span group and a staggered span group, the conventional span group comprises conventional spans adopted when a plurality of continuous wave windings are continuously arranged, and the staggered span group comprises staggered spans adopted when the plurality of continuous wave windings are continuously arranged. The dislocation span group comprises a plurality of dislocation spans adopted during dislocation transformation of the continuous wave winding, each winding wire of the continuous wave winding is arranged by adopting one dislocation span of a plurality of conventional spans and dislocation spans in the conventional span group, and each winding wire is arranged by adopting one dislocation span only once. According to the invention, while the process difficulty is reduced, the problems of motor heating, vibration and the like caused by phase imbalance between branches of each phase winding can be effectively avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a continuous wave winding structure of a motor stator, a motor and a vehicle. Background Art

[0002] With the application of flat copper wire in new energy motors, motors are developing in the direction of high voltage and high speed. The AC loss problem of flat copper wire windings at high speed (caused by the skin effect and proximity effect of flat copper wire) is more prominent. The main coping method is to use flatter flat copper wire and arrange more layers of flat copper wire in the slot, which will increase the number of turns of each branch of the winding. In order not to affect the performance output, multiple branches will be set in parallel to obtain the appropriate number of turns when designing each phase winding. When there are multiple branches in parallel for each phase winding, coupled with the requirement of high speed, the phase imbalance problem between the branches of each phase winding will be magnified. Even if there is a small imbalance problem between the branches, it will bring more harmonic electromotive force and circulating current, causing motor heating, NVH vibration noise and other problems.

[0003] The current W-pin continuous wave winding process is complicated. If each flat copper wire is arranged in the same layer in the stator slot, the problem of cross-interference in the same layer is more serious, causing greater damage to the insulation of the copper wire. If each flat copper wire is alternately arranged in adjacent layers in the stator slot, the copper wires in the same layer have the same bending direction, which can avoid the problem of interference and damage to the insulating paint. However, it is necessary to weave the longer flat copper wires together in a certain arrangement and combination before they can be rolled into the stator core. The formed copper wires are longer and it is difficult to carry out automatic weaving. Manual weaving will lead to the inability to accurately control the length of the copper wire, increase the amount of copper used in the stator, and increase the size of the winding end. Summary of the invention

[0004] The present invention provides a continuous wave winding structure of a motor stator, a motor and a vehicle, which can effectively avoid problems such as motor heating and vibration caused by phase imbalance between branches of each phase winding while reducing the process difficulty.

[0005] In order to solve or improve the above technical problems to a certain extent, according to the present invention, a continuous wave winding structure of a motor stator is provided, comprising: an M-phase continuous wave winding, the continuous wave winding comprising a conventional span group and a staggered span group, wherein the conventional span group comprises a plurality of conventional spans adopted when the continuous wave windings are arranged continuously, the staggered span group comprises a plurality of staggered spans adopted when the continuous wave windings are staggered and transformed, each winding conductor of the continuous wave winding is arranged using a plurality of conventional spans in the conventional span group and one staggered span among the staggered spans, and each of the winding conductors is arranged using the staggered span only once.

[0006] In some embodiments, each of the winding wires includes N straight line segments, each of the straight line segments is disposed in the stator slots of the motor, and the offset span of each of the winding wires is disposed between the 2 / 3Nth straight line segment and the 2 / 3N+1th straight line segment.

[0007] In some embodiments, each of the winding wires includes N straight line segments, each of the straight line segments is disposed in the stator slots of the motor, and the offset span of each of the winding wires is disposed between the 1 / 3Nth straight line segment and the 1 / 3N+1th straight line segment.

[0008] In some embodiments, 2n layers of winding wires are arranged in each of the stator slots, wherein n is a natural number greater than or equal to 2, and the number of poles P of the motor rotor is 6;

[0009] Every six straight line segments of the N straight line segments of each winding conductor are arranged in two adjacent layers of the stator slots, and the first to fifth straight line segments are arranged in the odd-numbered layers of the 2n layers, and the sixth straight line segment is arranged in the even-numbered layers of the 2n layers; or

[0010] The first straight line segment is arranged in the odd-numbered layers of the 2n layers, and the second to sixth straight line segments are arranged in the even-numbered layers of the 2n layers.

[0011] In some embodiments, 2n layers of winding wires are arranged in each of the stator slots, wherein n is a natural number greater than or equal to 2, and the number of poles P of the motor rotor is 6;

[0012] Every six straight line segments of the N straight line segments of each winding conductor are arranged in two adjacent layers of the stator slots, and the first to third straight line segments of every six straight line segments are arranged in the odd-numbered layers of the 2n layers, and the fourth to sixth straight line segments are arranged in the even-numbered layers of the 2n layers; or

[0013] The first to third straight line segments are arranged in the even-numbered layers of the 2n layer, and the fourth to sixth straight line segments are arranged in the odd-numbered layers of the 2n layer.

[0014] In some embodiments, the continuous wave winding includes six types of bent winding conductors, and every two of the bent winding conductors are connected in series to form a branch of each phase winding. Each phase winding of the continuous wave winding includes three branches.

[0015] In some embodiments, the continuous wave winding includes six types of bent winding conductors, and every three types of the bent winding conductors are connected in series to form a branch of each phase winding, and each phase winding of the continuous wave winding includes two branches.

[0016] In some embodiments, the regular spans of the regular span group include 7, 9, and 11, and the misaligned spans of the misaligned span group include 8, 9, and 10.

[0017] According to another aspect of the present invention, there is provided a motor, comprising a stator and a rotor, wherein the stator comprises the continuous wave winding structure of the motor stator as described in any one of the above embodiments.

[0018] According to another aspect of the present invention, a vehicle is provided, comprising the motor described in any one of the above embodiments.

[0019] Compared with the prior art, the present invention has obvious advantages and beneficial effects. By means of the above technical solution, the continuous wave winding structure of the motor stator, the motor and the vehicle of the present invention can achieve considerable technical advancement and practicality, and have wide industrial utilization value, and have at least the following advantages:

[0020] The present invention proposes a continuous wave winding structure for a motor stator, which adopts specific conventional span groups and staggered span groups to realize the winding of the continuous wave winding, effectively reducing the number of staggered transformations of the continuous wave winding, and eliminating the need to perform a staggered transformation every two layers, thereby effectively reducing the difficulty of the winding process of the continuous wave winding and ensuring the potential balance between the branches of the continuous wave winding, thereby avoiding problems such as motor heating and vibration caused by phase imbalance between the branches of each phase winding.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional schematic diagram of an arrangement of winding conductors in stator slots according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the winding of the first branch of the U-phase winding of the continuous wave winding structure of the motor stator according to the first embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the winding of the second branch of the U-phase winding of the continuous wave winding structure of the motor stator according to the first embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the winding of the third branch of the U-phase winding of the continuous wave winding structure of the motor stator according to the first embodiment of the present invention;

[0026] Figure 5It is a schematic diagram of the expansion of a part of winding wires of the continuous wave winding structure of the motor stator according to the first embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the expansion of another part of the winding wires of the continuous wave winding structure of the motor stator according to the first embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the winding of the U-phase winding of the continuous wave winding structure of the motor stator according to the first embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the winding of a three-phase winding of a continuous wave winding structure of a motor stator according to a first embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of three branches of a continuous wave winding structure of a motor stator according to a first embodiment of the present invention;

[0031] Fig.10 A schematic diagram of two branches of a continuous wave winding structure of a motor stator according to a first embodiment of the present invention;

[0032] Fig.11 A schematic diagram of the winding of the first branch of the U-phase winding of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention;

[0033] Fig.12 A schematic diagram of the winding of the second branch of the U-phase winding of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention;

[0034] Fig.13 A schematic diagram of the winding of the third branch of the U-phase winding of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention;

[0035] Fig.14 It is a schematic diagram of the expansion of a part of winding wires of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention;

[0036] Fig.15 It is a schematic diagram of the expansion of another part of the winding wires of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention;

[0037] Fig.16 A schematic diagram of the winding of the U-phase winding of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention;

[0038] Fig.17 A schematic diagram of the winding of a three-phase winding of a continuous wave winding structure of a motor stator according to a second embodiment of the present invention;

[0039] Fig.18 A schematic diagram of three branches of a continuous wave winding structure of a motor stator according to a second embodiment of the present invention;

[0040] Fig.19 Schematic diagram of two branches of the continuous wave winding structure of the motor stator according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of the continuous wave winding structure of a motor stator, the specific implementation methods of the motor and the vehicle proposed in accordance with the present invention and their effects, in combination with the accompanying drawings and preferred embodiments.

[0042] According to an embodiment of the present invention, the number of slots per phase per pole of the motor stator is Q, the number of motor phases is M, the number of rotor poles of the motor is P, and the total number of stator slots of the motor stator is M×Q×P. The continuous wave winding structure of the motor stator includes: M-phase continuous wave windings, the continuous wave windings include a regular span group and a staggered span group. The regular span group includes a regular span used when multiple continuous wave windings are arranged continuously, and the staggered span group includes a staggered span used when multiple continuous wave windings are staggered and transformed.

[0043] Each winding conductor of the continuous wave winding is arranged with one staggered span among a plurality of normal spans and staggered spans in a normal span group, and each winding conductor is arranged with only one staggered span.

[0044] It should be noted that the winding conductor will include multiple straight segments arranged in the stator slots during the winding process, and the spacing between adjacent straight segments is the span, that is, the number of stator slots between adjacent straight segments of the winding conductor is the span. During the winding process, multiple winding conductors of the continuous wave winding are staggered, and when such staggering occurs between the winding conductors, the span of the winding conductors is the offset span, and the offset span group includes multiple offset spans. During the winding process, when multiple winding conductors do not intersect with each other, the span used is the conventional span, and the conventional span group includes multiple conventional spans.

[0045] The continuous wave winding structure of the motor stator of the present invention adopts a specific span, and each winding wire undergoes only one misalignment transformation during the winding process, which effectively reduces the number of winding misalignment transformations and the difficulty of the winding process of the continuous wave winding, while ensuring the potential balance between the branches of the continuous wave winding.

[0046] In one embodiment, the regular spans in the regular span group include 7, 9, and 11. The misaligned spans in the misaligned span group include 8, 9, and 10.

[0047] In one embodiment, each winding conductor of the continuous wave winding includes N straight segments, wherein the straight segment is the portion of the winding conductor arranged in the stator slot, that is, the straight segments of the winding conductor are all arranged in the stator slot of the motor. Each winding conductor adopts a primary offset span, and the offset span is arranged between the 2 / 3Nth straight segment and the 2 / 3N+1th straight segment of the N straight segments of the winding conductor.

[0048] For example, when the number of slots per pole per phase of the motor stator Q is 3, and 8 layers of straight line segments are arranged in each pole per phase slot, the number of straight line segments of each winding wire is 24, and the staggered span is set between the 2 / 3×24th straight line segment and the 2 / 3×24+1th straight line segment, that is, the staggered span of each winding wire is set between the 16th straight line segment and the 17th straight line segment of the winding wire.

[0049] In one embodiment, each winding conductor of the continuous wave winding includes N straight segments, wherein the straight segment is the portion of the winding conductor arranged in the stator slot, that is, the straight segments of the winding conductor are all arranged in the stator slot of the motor. Each winding conductor adopts a primary offset span, and the offset span is arranged between the 1 / 3Nth straight segment and the 1 / 3N+1th straight segment of the N straight segments of the winding conductor.

[0050] For example, when the number of slots per pole per phase of the motor stator is Q 3, and 8 layers of straight line segments are arranged in each pole per phase slot, the number of straight line segments of each winding wire is 24, and the staggered span is set between the 1 / 3×24th straight line segment and the 1 / 3×24+1th straight line segment, that is, the staggered span of each winding wire is set between the 8th straight line segment and the 9th straight line segment of the winding wire.

[0051] In one embodiment, 2n layers of winding wires are arranged in each motor stator slot, that is, 2n layers of straight line segments are arranged in each motor stator slot, where n is a natural number greater than or equal to 2. The number of poles P of the motor rotor is 6, that is, each winding wire has six straight line segments around the entire circumference of the stator.

[0052] like Figure 1 As shown, when n=4, 8 layers of winding wires are arranged in each stator slot of the motor. Along the direction from the outer diameter to the inner diameter of the motor stator, each layer of winding wires is named L1, L2, L3, L4, L5, L6, L7, and L8.

[0053] Among the N straight line segments of each winding conductor, every six straight line segments (ie, six straight line segments when the winding conductor winds around the stator once) are arranged in two adjacent layers in the stator slots.

[0054] Optionally, among every six straight line segments, the first to fifth straight line segments are arranged in odd-numbered layers among the 2n layers of the stator slots, and the sixth straight line segment is arranged in an even-numbered layer among the 2n layers of the stator slots.

[0055] Optionally, in every six straight line segments, the first straight line segment is arranged in an odd-numbered layer among the 2n layers of the stator slots, and the second to sixth straight line segments are arranged in an even-numbered layer among the 2n layers of the stator slots.

[0056] Optionally, among every six straight line segments, the first to third straight line segments are arranged in odd-numbered layers among the 2n layers of the stator slots, and the fourth to sixth straight line segments are arranged in even-numbered layers among the 2n layers of the stator slots.

[0057] Optionally, among every six straight line segments, the first to third straight line segments are arranged in odd-numbered layers among the 2n layers of the stator slots, and the fourth to sixth straight line segments are arranged in even-numbered layers among the 2n layers of the stator slots.

[0058] In this embodiment, radial balance of the potential of each branch of the winding conductor is ensured by limiting the arrangement position of the straight section of the winding conductor.

[0059] In one embodiment, the continuous wave winding includes six types of bent winding conductors, each phase winding includes three branches, and every two bent winding conductors are connected in series to form a branch of each phase winding.

[0060] Specifically, the first and fifth types of winding conductors bent and formed are connected in series to form a first branch, the second and fourth types of winding conductors bent and formed are connected in series to form a second branch, and the third and sixth types of winding conductors bent and formed are connected in series to form a third branch.

[0061] In one embodiment, the continuous wave winding includes six types of winding conductors bent into shape, each phase winding includes two branches, and every three winding conductors bent into shape are connected in series to form a branch of each phase winding.

[0062] Specifically, the first, second and third types of winding conductors bent and shaped are connected in series to form a first branch, and the fourth, fifth and sixth types of winding conductors bent and shaped are connected in series to form a second branch.

[0063] In one embodiment, in the continuous wave winding, each pole and each phase winding shares six types of continuously bent flat copper wires (i.e., winding conductors), each type of continuously bent flat copper wire has a total of 6n straight line segments, and its regular spans include 7, 11, 7, 11... or 9, 9, 9, 9... or 11, 7, 11, 7..., etc., and the staggered spans are 8, 9, 10, and each type of continuously bent flat copper wire is staggered only once, that is, it is staggered once with a staggered span of 8, 9 or 10, and the staggered transformation is set between the 6n×2 / 3=4nth straight line segment and the 4n+1th straight line segment, or between the 6n×1 / 3=2nth straight line segment and the 2n+1th straight line segment.

[0064] In this embodiment, when n=3, that is, there are 6 (i.e., 2n) layers of straight segments in the stator slot, the continuously bent and formed flat copper wire has a total of 18 straight segments. The span combination of the first continuously bent and formed flat copper wire is 11, 7, 11, 7, 11, 7, 11, 7, 11, 8, 9, 9, 9, 9, 9; the span combination of the second continuously bent and formed flat copper wire is 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 7, 11, 7, 11, 7; the span combination of the third continuously bent and formed flat copper wire is 7, 11, 7, 11, 7, 11, 7, 11 The fourth span combination of continuously bent and formed flat copper wire is 9, 9, 9, 9, 8, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, the fifth span combination of continuously bent and formed flat copper wire is 11, 7, 11, 7, 11, 9, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, and the sixth span combination of continuously bent and formed flat copper wire is 7, 11, 7, 11, 7, 10, 9, 9, 9, 9, 9, 9, 9, 9.

[0065] In a specific embodiment, a motor is provided in which the number of phases M=3, the number of motor rotor poles P=6, the number of slots per pole per phase Q=3, and the number of motor stator slots M×P×Q=54, that is, the motor is a 6-pole 54-slot three-phase motor. Figure 2-Figure 4 As shown, 8 (i.e., 2n, n=4) straight segments of winding wires are arranged in each stator slot, which are named L1, L2, L3, L4, L5, L6, L7, and L8 in the direction from the outer diameter to the inner diameter of the stator.

[0066] In this embodiment, each pole and each phase winding of the continuous wave winding structure of the motor stator is composed of three branches, wherein: Figure 2 shows a winding schematic diagram of the first branch of the U-phase winding of the motor, Figure 3 shows a winding schematic diagram of the second branch of the U-phase winding of the motor, Figure 4 A winding schematic diagram of the third branch of the U-phase winding of the motor is shown.

[0067] like Figure 2-Figure 4 As shown, the first branch includes two continuous bending forming conductors, named 1a and 1k, the second branch includes two continuous bending forming conductors, named 2b and 2j, and the third branch includes two continuous bending forming conductors, named 3c and 3l.

[0068] Among the six types of continuously bent shaped conductors 1a, 2b, 3c, 1k, 2j, and 3l, each type of continuously bent shaped conductors has 24 straight segments, wherein every six straight segments of the continuously bent shaped conductors 1a, 2b, and 3c are arranged in two adjacent layers of the entire circumference of the stator core, the first straight segment is arranged in the odd-numbered layers, and the second to sixth straight segments are arranged in the even-numbered layers.

[0069] Take the continuous bending forming conductor 1a as an example. Figure 2 As shown, the six straight segments of the continuously bent formed conductor 1a are 1a1-1a6, which are arranged in the L1 layer and the L2 layer in the stator slot, wherein 1a1 is arranged in the L1 layer (ie, the odd layer), and 1a2-1a6 are all arranged in the L2 layer (ie, the even layer).

[0070] Every six straight segments of the continuously bent and formed conductors 1k, 2j, 3l are arranged in two adjacent layers of the entire circumference of the stator core, the first to fifth straight segments are arranged in odd-numbered layers, and the sixth straight segment is arranged in even-numbered layers.

[0071] Take the continuous bending forming conductor 1k as an example. Figure 2 As shown, the six straight segments of the continuously bent wire 1k are 1k1-1k6, which are arranged in the L7 layer and the L8 layer in the stator slot, wherein 1k1 is arranged in the L8 layer (ie, the even layer), and 1k2-1k6 are all arranged in the L7 layer (ie, the odd layer).

[0072] like Figure 5 and 6 As shown, the spans used by the continuously bent wires 1a, 2b, 3c, 1k, 2j, 3l are 7, 8, 9, 10, 11. Figure 5 As shown, the continuously bent wires 1a, 2b, 3c are staggered once between the 16th straight line segment (i.e., 2 / 3×24) and the 17th straight line segment (i.e., 2 / 3×24+1) using spans 8, 9, and 10, respectively. Figure 6 As shown, the 8th straight line segment (i.e., 1 / 3×24) and the 9th straight line segment (i.e., 1 / 3×24+1) of the continuously bent and formed conductors 1k, 2j, and 3l are staggered once with spans of 8, 9, and 10 respectively.

[0073] like Figure 2-7As shown, the span combination of the continuously bent and formed conductor 1a is 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 8, 9, 9, 9, 9, 9, 9, 9, the span combination of the continuously bent and formed conductor 2b is 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 7, 11, 7, 11, 7, 11, 7, and the span combination of the continuously bent and formed conductor 3c is 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 9,

[0074] 11, 7, 11, 7, 11, 7, 11. The span combinations of the continuously bent wire 1k are 9, 9, 9, 9, 9, 9, 8, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11,

[0075] 7, 11. The span combination of the continuously bent and formed conductor 2j is 11, 7, 11, 7, 11, 7, 11, 9, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7. The span combination of the continuously bent and formed conductor 3c is 7, 11, 7, 11, 7, 11, 7, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9.

[0076] like Figure 7 As shown, the beginning of each continuous bent formed wire is marked as 1, i.e., the first straight line segment, the beginning is where the current flows in, and the end of each continuous bent formed wire is marked as 24, i.e., the 24th straight line segment, the end is where the current flows out, and the three branches of the U-phase winding are composed of two continuous bent formed wires connected in series.

[0077] Figure 8 The winding diagram of the three-phase winding of the continuous wave winding structure of the motor stator is shown as follows: Figure 8 As shown, the three-phase windings U, V, and W each use 6 shaped conductors, for a total of 18 conductors. The 6 continuously bent shaped conductors of the U-phase winding are named 1a, 2b, 3c, 1k, 2j, and 3l, the 6 continuously bent shaped conductors of the V-phase winding are named 1g, 2h, 3i, 2p, 1q, and 3r, and the 6 continuously bent shaped conductors of the W-phase winding are named 1d, 2e, 3f, 2m, 1n, and 3o. There are six types of shaped conductors in the three-phase windings U, V, and W, of which 1a, 1g, and 1d are one type of shaped conductor, 2b, 2e, and 2h are one type of shaped conductor, 3c, 3f, and 3i are one type of shaped conductor, 1k, 1n, and 1q are one type of shaped conductor, 2j, 2m, and 2p are one type of shaped conductor, and 3l, 3o, and 3r are one type of shaped conductor.

[0078] Fig. 9FIG. 1 is a schematic diagram showing the parallel branches of the three-phase windings of the continuous wave winding structure of the motor stator. Fig. 9 As shown, the number of branches of the three-phase windings U, V, and W is three, and every two of the six continuously bent wires of each phase are connected in series end to end.

[0079] Fig.10 FIG. 1 is a schematic diagram showing the parallel branches of the three-phase windings of the continuous wave winding structure of the motor stator. Fig.10 As shown, the number of branches of the three-phase windings U, V, and W is two, and every three of the six continuously bent wires of each phase are connected in series end to end.

[0080] In a specific embodiment, a motor is provided in which the number of phases M=3, the number of motor rotor poles P=6, the number of slots per pole per phase Q=3, and the number of motor stator slots M×P×Q=54, that is, the motor is a 6-pole 54-slot three-phase motor. Figure 11-13 As shown, 6 (i.e., 2n, n=3) straight segments of winding wires are arranged in each stator slot, and are named L1, L2, L3, L4, L5, and L6 in sequence along the direction from the outer diameter to the inner diameter of the stator.

[0081] In this embodiment, each pole and each phase winding of the continuous wave winding structure of the motor stator is composed of three branches, wherein: Fig.11 shows a winding schematic diagram of the first branch of the U-phase winding of the motor, Fig.12 shows a winding schematic diagram of the second branch of the U-phase winding of the motor, Fig.13 A winding schematic diagram of the third branch of the U-phase winding of the motor is shown.

[0082] like Figure 11-13 As shown, the first branch includes two continuous bending forming conductors, named 1a and 1k, the second branch includes two continuous bending forming conductors, named 2b and 2j, and the third branch includes two continuous bending forming conductors, named 3c and 3l.

[0083] Among the six types of continuously bent shaped conductors 1a, 2b, 3c, 1k, 2j, and 3l, each type of continuously bent shaped conductors has 18 straight line segments, wherein every six straight line segments of the continuously bent shaped conductors 1a, 2b, and 3c are arranged in two adjacent layers of the entire circumference of the stator core, the first straight line segment is arranged in the odd-numbered layers, and the second to sixth straight line segments are arranged in the even-numbered layers.

[0084] Take the continuous bending forming conductor 1a as an example. Fig.11 As shown, the six straight segments of the continuously bent formed conductor 1a are 1a1-1a6, which are arranged in the L1 layer and the L2 layer in the stator slot, wherein 1a1 is arranged in the L1 layer (ie, the odd layer), and 1a2-1a6 are all arranged in the L2 layer (ie, the even layer).

[0085] Every six straight segments of the continuously bent and formed conductors 1k, 2j, 3l are arranged in two adjacent layers of the entire circumference of the stator core, the first to fifth straight segments are arranged in odd-numbered layers, and the sixth straight segment is arranged in even-numbered layers.

[0086] Take the continuous bending forming conductor 1k as an example. Fig.11 As shown, the six straight segments of the continuously bent wire 1k are 1k1-1k6, which are arranged in the L5 and L6 layers in the stator slots, wherein 1k1 is arranged in the L6 layer (ie, the even layer), and 1k2-1k6 are all arranged in the L5 layer (ie, the odd layer).

[0087] like Fig.14 and 15 As shown, the spans used by the continuously bent wires 1a, 2b, 3c, 1k, 2j, 3l are 7, 8, 9, 10, 11. Fig.14 As shown, the continuously bent wires 1a, 2b, 3c are staggered once between the 12th straight line segment (i.e., 2 / 3×18) and the 13th straight line segment (i.e., 2 / 3×18+1) using spans 8, 9, and 10, respectively. Figure 6 As shown, the sixth straight line segment (i.e., 1 / 3×18) and the seventh straight line segment (i.e., 1 / 3×28+1) of the continuously bent and formed conductors 1k, 2j, and 3l are staggered once with spans of 8, 9, and 10, respectively.

[0088] like Figure 11-15 As shown, the span combination of the continuously bent and formed conductor 1a is 11, 7, 11, 7, 11, 7, 11, 7, 11, 8, 9, 9, 9, 9, 9, the span combination of the continuously bent and formed conductor 2b is 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 7, 11, 7, 11, 7, and the span combination of the continuously bent and formed conductor 3c is 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 9, 11, 7, 11, 7, 11, 7, 1. The span combination of the continuously bent and formed conductor 1k is 9, 9, 9, 9, 8, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11; the span combination of the continuously bent and formed conductor 2j is 11, 7, 11, 7, 11, 9, 7, 11, 7, 11, 7, 11, 7, 11, 7, 11, 7; the span combination of the continuously bent and formed conductor 3c is 7, 11, 7, 11, 7, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9.

[0089] like Fig.16As shown, the beginning of each continuous bent formed wire is marked as 1, i.e., the first straight line segment, the beginning is where the current flows in, and the end of each continuous bent formed wire is marked as 24, i.e., the 24th straight line segment, the end is where the current flows out, and the three branches of the U-phase winding are composed of two continuous bent formed wires connected in series.

[0090] Fig.17 The winding diagram of the three-phase winding of the continuous wave winding structure of the motor stator is shown as follows: Fig.17 As shown, the three-phase windings U, V, and W each use 6 shaped conductors, for a total of 18 conductors. The 6 continuously bent shaped conductors of the U-phase winding are named 1a, 2b, 3c, 1k, 2j, and 3l, the 6 continuously bent shaped conductors of the V-phase winding are named 1g, 2h, 3i, 2p, 1q, and 3r, and the 6 continuously bent shaped conductors of the W-phase winding are named 1d, 2e, 3f, 2m, 1n, and 3o. There are six types of shaped conductors in the three-phase windings U, V, and W, of which 1a, 1g, and 1d are one type of shaped conductor, 2b, 2e, and 2h are one type of shaped conductor, 3c, 3f, and 3i are one type of shaped conductor, 1k, 1n, and 1q are one type of shaped conductor, 2j, 2m, and 2p are one type of shaped conductor, and 3l, 3o, and 3r are one type of shaped conductor.

[0091] Fig.18 FIG. 1 is a schematic diagram showing the parallel branches of the three-phase windings of the continuous wave winding structure of the motor stator. Fig.18 As shown, the number of branches of the three-phase windings U, V, and W is three, and every two of the six continuously bent wires of each phase are connected in series end to end.

[0092] Fig.19 FIG. 1 is a schematic diagram showing the parallel branches of the three-phase windings of the continuous wave winding structure of the motor stator. Fig.19 As shown, the number of branches of the three-phase windings U, V, and W is two, and every three of the six continuously bent wires of each phase are connected in series end to end.

[0093] In the above specific implementation manner, the continuous wave winding of the 54-slot 6-pole three-phase motor adopts a specific span combination 11, 9, and 7. Each continuous flat copper wire is staggered and transformed only in the straight section at 1 / 3 or 2 / 3 through spans 8, 9, and 10, and the specific number of layers is set, so that the potential of the three branches of the winding can be balanced. This winding scheme greatly avoids the damage to the copper wire caused by the bending and extrusion of the winding end, is more process-friendly, and does not require complicated wire braiding operations, and is easy to manufacture.

[0094] Another embodiment of the present invention provides a motor, comprising a stator and a rotor, wherein the winding of the stator comprises the continuous wave winding structure of the motor stator of any of the above embodiments.

[0095] Another embodiment of the present invention provides a vehicle, which includes the motor according to any one of the above embodiments.

[0096] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A continuous wave winding structure of a motor stator, characterized in that: include: M-phase continuous wave winding, the continuous wave winding includes a conventional span group and a staggered span group, wherein the conventional span group includes a plurality of conventional spans used when the continuous wave windings are arranged continuously, and the staggered span group includes a plurality of staggered spans used when the continuous wave windings are staggered and transformed, each winding conductor of the continuous wave winding is arranged using a plurality of conventional spans in the conventional span group and one staggered span among the staggered spans, and each winding conductor is arranged using the staggered span only once.

2. The continuous wave winding structure of the motor stator according to claim 1, characterized in that: Each of the winding wires includes N straight line segments, and the straight line segments are all arranged in the stator slots of the motor. The offset span of each of the winding wires is arranged between the 2 / 3Nth straight line segment and the 2 / 3N+1th straight line segment.

3. The continuous wave winding structure of the motor stator according to claim 1, characterized in that: Each of the winding wires includes N straight line segments, and the straight line segments are all arranged in the stator slots of the motor. The offset span of each of the winding wires is arranged between the 1 / 3Nth straight line segment and the 1 / 3N+1th straight line segment.

4. The continuous wave winding structure of the motor stator according to claim 2 or 3, characterized in that: 2n layers of winding wires are arranged in each of the stator slots, wherein n is a natural number greater than or equal to 2, and the number of poles P of the motor rotor is 6; Every six straight line segments of the N straight line segments of each winding conductor are arranged in two adjacent layers of the stator slots, and the first to fifth straight line segments are arranged in the odd-numbered layers of the 2n layers, and the sixth straight line segment is arranged in the even-numbered layers of the 2n layers; or The first straight line segment is arranged in the odd-numbered layers of the 2n layers, and the second to sixth straight line segments are arranged in the even-numbered layers of the 2n layers.

5. The continuous wave winding structure of the motor stator according to claim 2 or 3, characterized in that: 2n layers of winding wires are arranged in each of the stator slots, wherein n is a natural number greater than or equal to 2, and the number of poles P of the motor rotor is 6; Every six straight line segments of the N straight line segments of each winding conductor are arranged in two adjacent layers of the stator slots, and the first to third straight line segments of every six straight line segments are arranged in the odd-numbered layers of the 2n layers, and the fourth to sixth straight line segments are arranged in the even-numbered layers of the 2n layers; or The first to third straight line segments are arranged in the even-numbered layers of the 2n layer, and the fourth to sixth straight line segments are arranged in the odd-numbered layers of the 2n layer.

6. The continuous wave winding structure of the motor stator according to claim 1, characterized in that: The continuous wave winding includes six types of bent winding conductors, and every two of the bent winding conductors are connected in series to form a branch of each phase winding. Each phase winding of the continuous wave winding includes three branches.

7. The continuous wave winding structure of the motor stator according to claim 1, characterized in that: The continuous wave winding includes six types of bent winding conductors, and every three types of bent winding conductors are connected in series to form a branch of each phase winding. Each phase winding of the continuous wave winding includes two branches.

8. The continuous wave winding structure of the motor stator according to claim 1, characterized in that: The regular spans of the regular span group include 7, 9, and 11, and the misaligned spans of the misaligned span group include 8, 9, and 10.

9. A motor, characterized in that: It comprises a stator and a rotor, wherein the stator comprises the continuous wave winding structure of the motor stator according to any one of claims 1-8.

10. A vehicle, characterized in that: A motor comprising the motor described in claim 9.

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