Winding method of motor stator winding, motor and vehicle

Abstract

The invention provides a winding method of a motor stator winding, a motor and a vehicle. The winding method comprises the steps of determining the number of slots of each pole and each phase of a motor stator and the phase number of the motor; a plurality of first spans of the motor stator winding are calculated according to the number and the phase number of the slots of each pole and each phase, and the plurality of first spans are different or partially identical; and winding the motor stator winding based on the plurality of first spans so as to enable the motor stator winding to perform continuous transposition in the plurality of each-pole and each-phase slots. The invention provides a universal winding method of a motor stator winding, and 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 invention belongs to the technical field of motors, and in particular relates to a method for winding a motor stator winding, a motor and a vehicle. Background Art

[0002] Depending on the usage scenario and usage requirements, the number of slots per pole per phase of the motor's three-phase winding varies, and the number of slots per pole per phase corresponds to different pole-slot combinations, which means that multiple winding designs are required, resulting in a huge workload for designers. At the same time, as motors develop in the direction of high voltage and high speed, flat copper wire windings have emerged. However, in actual use, when multiple winding branches are connected in parallel, the phase imbalance problem between the branches of each phase winding is magnified, resulting in motor heating, motor vibration noise and other problems. Summary of the invention

[0003] The present invention provides a method for winding a motor stator winding, a motor and a vehicle, so as to propose a universal winding method for a motor stator winding and effectively avoid problems such as motor heating and vibration caused by phase imbalance between branches of each phase winding.

[0004] In order to solve or improve the above technical problems to a certain extent, a method for winding a motor stator winding is provided according to the present invention, comprising: determining the number of slots per pole per phase of the motor stator and the number of phases of the motor;

[0005] Calculating a plurality of first spans of the stator winding of the motor according to the number of slots per pole per phase and the number of phases, wherein the plurality of first spans are different or partially the same;

[0006] The motor stator winding is wound based on the plurality of the first spans, so that the motor stator winding is continuously transposed in the plurality of the per-pole per-phase slots.

[0007] In some embodiments, the calculation is based on the following formula:

[0008]

[0009] Where Y Q is the first span of the motor stator winding, including y1, y2, ..., y Q , Q is the number of slots per pole per phase, and m is the number of phases of the motor.

[0010] In some embodiments, the calculation is based on the following formula:

[0011]

[0012] Where Y Qis the first span of the motor stator winding, including y1, y2, ..., y Q , Q is the number of slots per pole per phase, and m is the number of phases of the motor.

[0013] In some embodiments, 2n layers of winding wires are arranged in each stator slot of the motor, where n is a natural number greater than or equal to 2;

[0014] Each of the winding wires includes a plurality of straight segments, and the plurality of straight segments are arranged in the stator slots of the motor;

[0015] The arrangement of the plurality of straight segments of each winding conductor in the stator slot of the motor is as follows:

[0016] Among the plurality of straight line segments, two straight line segments that are adjacent in sequence and located in the same layer in the stator slot form a group, and each two adjacent groups of straight line segments are arranged in the odd-numbered layers and the even-numbered layers, respectively.

[0017] In some embodiments, 2n layers of winding wires are arranged in each stator slot of the motor, where n is a natural number greater than or equal to 2;

[0018] Each of the winding wires includes a plurality of straight segments, and the plurality of straight segments are arranged in the stator slots of the motor;

[0019] The arrangement of the plurality of straight segments of each winding conductor in the stator slot of the motor is as follows:

[0020] Among the plurality of straight line segments, every two adjacent straight line segments are sequentially arranged in odd-numbered layers and even-numbered layers in the 2n layers, respectively.

[0021] In some embodiments, the motor stator windings share Q types of continuously bent winding wires, and the second spans of the straight segments of the Q types of winding wires are respectively the same as multiple of the first spans, where Q is the number of slots per pole per phase.

[0022] In some embodiments, the continuously bent winding conductor also includes a bent segment, which is used to connect two adjacent straight segments. Each type of continuously bent winding conductor is arranged in the stator slot for n turns, and each type of continuously bent winding conductor has a total of 2P straight segments arranged around the stator. The number of straight segments and the bent segments of each type of continuously bent winding conductor is 2P×n; wherein P is the number of poles of the motor rotor.

[0023] In some embodiments, each phase winding uses 2Q of the continuously bent winding wires, Q is the number of slots per pole per phase, and the number of branches of each phase winding formed by the 2Q continuously bent winding wires is 2Q, Q, 2 or 1.

[0024] According to another aspect of the present invention, there is provided a motor, comprising a stator and a rotor, wherein the winding of the stator is wound based on the method for winding the stator winding of the motor according to any one of the above embodiments.

[0025] According to another aspect of the present invention, a vehicle is provided, comprising the motor described in any one of the above embodiments.

[0026] Compared with the prior art, the present invention has obvious advantages and beneficial effects. By means of the above technical solution, the winding method of the motor stator winding, 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:

[0027] The present invention proposes a method for winding a motor stator winding. The span of the motor stator winding can be calculated according to the number of slots per pole per phase of the motor stator and the number of phases of the motor, which effectively reduces the difficulty of motor design and the workload of technical personnel. In addition, by winding according to the calculated span of the motor stator winding, continuous transposition of the motor stator winding in each pole per phase slot can be achieved, thereby ensuring the circumferential balance of the potential of each branch of the winding and avoiding problems such as motor heating and vibration caused by phase imbalance between branches of each phase winding.

[0028] 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

[0029] Figure 1 A schematic flow chart of a method for winding a motor stator winding according to an embodiment of the present invention;

[0030] Figure 2 A cross-sectional schematic diagram of an arrangement of winding conductors in stator core slots according to an embodiment of the present invention;

[0031] Figure 3 It is a winding schematic diagram of the U-phase winding of the motor of the first embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the winding of the three-phase winding of the motor according to the first embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of a parallel branch 1 of a three-phase winding of a motor according to a first embodiment of the present invention;

[0034] Figure 6Schematic diagram of the second parallel branch of the three-phase winding of the motor of the first embodiment of the present invention;

[0035] Figure 7 Schematic diagram of a third parallel branch of a three-phase winding of a motor according to a first embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the winding of the U-phase winding of the motor according to the second embodiment of the present invention;

[0037] Fig. 9 A schematic diagram of the winding of the three-phase winding of the motor according to the second embodiment of the present invention;

[0038] Fig.10 is a schematic diagram of a parallel branch 1 of a three-phase winding of a motor according to a second embodiment of the present invention;

[0039] Fig.11 is a schematic diagram of a second parallel branch of a three-phase winding of a motor according to a second embodiment of the present invention;

[0040] Fig.12 Schematic diagram of a third parallel branch of a three-phase winding of a motor according to a second embodiment of the present invention;

[0041] Fig.13 A schematic diagram of the winding of the U-phase winding of the motor according to the third embodiment of the present invention;

[0042] Fig.14 A schematic diagram of the winding of the three-phase winding of the motor according to the third embodiment of the present invention;

[0043] Fig.15 is a schematic diagram of a parallel branch 1 of a three-phase winding of a motor according to a third embodiment of the present invention;

[0044] Fig.16 is a schematic diagram of a second parallel branch of a three-phase winding of a motor according to a third embodiment of the present invention;

[0045] Fig.17 Schematic diagram of a third parallel branch of a three-phase winding of a motor according to a third embodiment of the present invention;

[0046] Fig.18 A schematic diagram of the winding of the U-phase winding of the motor according to the fourth embodiment of the present invention;

[0047] Fig.19 A schematic diagram of the winding of the three-phase winding of the motor according to the fourth embodiment of the present invention;

[0048] Fig. 20 is a schematic diagram of a parallel branch 1 of a three-phase winding of a motor according to a fourth embodiment of the present invention;

[0049] Fig.21is a schematic diagram of a second parallel branch of a three-phase winding of a motor according to a fourth embodiment of the present invention;

[0050] Fig. 22 A schematic diagram of the winding of the U-phase winding of the motor according to the fifth embodiment of the present invention;

[0051] Fig.23 A schematic diagram of the winding of the three-phase winding of the motor according to the fifth embodiment of the present invention;

[0052] Fig.24 FIG. 5 is a schematic diagram of parallel branches of three-phase windings of a motor according to a fifth embodiment of the present invention. DETAILED DESCRIPTION

[0053] 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 a method for winding a motor stator winding, a specific implementation method of a motor and a vehicle proposed in accordance with the present invention, and their effects, in combination with the accompanying drawings and preferred embodiments.

[0054] According to an embodiment of the present invention, a method for winding a stator winding of a motor is provided, such as Figure 1 As shown, including:

[0055] Step S10, determining the number of slots per pole per phase of the motor stator and the number of phases of the motor.

[0056] The number of slots per pole per phase of the motor stator and the number of phases of the motor can be determined according to actual usage scenarios and usage requirements.

[0057] In some embodiments, the motor winding is a multi-phase winding with a phase number of m, where m=3x (x=1, 2, 3...), and when m=3, the three-phase windings are named U, V, and W in sequence.

[0058] The number of motor rotor poles is 2P, the number of pole pairs is P, P is a natural number ≥2, for example, P=2, 3, 4, 5...; the number of stator slots per pole per phase is Q, Q is a natural number ≥2, for example, Q=2, 3, 4, 5..., the number of stator core slots is z, z=m×2P×Q.

[0059] Optionally, when m=3, P=4, and Q=2, z=3×8×2=48, which is a three-phase motor with 8 poles and 48 slots; when m=3, P=3, and Q=3, z=3×6×3=54, which is a three-phase motor with 6 poles and 54 slots; when m=3, P=3, and Q=4, z=3×6×4=72, which is a three-phase motor with 6 poles and 72 slots; when m=6, P=3, and Q=2, z=6×6×2=72, which is a six-phase motor with 6 poles and 72 slots.

[0060] For example, in a three-phase winding motor, the number of slots per pole per phase Q is mostly 2, 3, 4, 5, 6, ..., corresponding to different pole-slot combinations, such as 36 slots and 6 poles, 48 ​​slots and 8 poles, 60 slots and 10 poles, 72 slots and 12 poles, etc. when Q=2; 54 slots and 6 poles, 72 slots and 8 poles, 90 slots and 10 poles, 108 slots and 12 poles, etc. when Q=3; 72 slots and 6 poles, 96 slots and 8 poles, 120 slots and 10 poles, 144 slots and 12 poles, etc. when Q=4; in a six-phase winding motor, the number of slots per pole per phase Q is mostly 2, 3, 4, 5, 6, ..., corresponding to different pole-slot combinations, such as 72 slots and 6 poles, 96 slots and 8 poles,

[0061] 120 slots 10 poles, 144 slots 12 poles, etc.; when Q=3, 108 slots 6 poles, 144 slots 8 poles, etc.; when Q=4, 144 slots 6 poles, etc.

[0062] Step S20, calculating a plurality of first spans of the stator winding of the motor according to the number of slots per pole per phase and the number of phases.

[0063] In this step, multiple first spans of the motor stator windings can be calculated based on the determined number of slots per pole per phase of the motor stator and the number of phases of the motor, wherein the multiple first spans are all different, or some of the multiple first spans are the same.

[0064] Optionally, the calculated number of first spans is the same as the number of slots per phase per pole of the motor stator.

[0065] In one embodiment, the plurality of first spans are calculated based on the following formula:

[0066]

[0067] In formula (1), Y Q is the first span of the motor stator winding, including y1,

[0068] y2……y Q , there are Q first spans in total, Q is the number of slots per pole per phase, and m is the number of phases of the motor. The calculated Q first spans enable each winding branch to continuously transpose in each Q slot per pole per phase, thereby ensuring the circumferential balance of the potential of each winding branch.

[0069] In some specific embodiments, when the motor is an 8-pole 48-slot three-phase motor, the number of phases of the motor is m=3, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Wherein, the number of stator core slots z is 48, and the number of motor rotor poles 2P is 8, so the number of slots per pole per phase Q=2 can be calculated. Then, it can be calculated by formula (1):

[0070]

[0071] When the motor is a three-phase motor with 6 poles and 54 slots, the number of phases of the motor is m=3, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Among them, the number of stator core slots z is 54, and the number of motor rotor poles 2P is 6, so the number of slots per pole per phase Q=3 can be calculated. Then, it can be calculated by formula (1):

[0072]

[0073] When the motor is a three-phase motor with 6 poles and 72 slots, the number of phases of the motor is m=3, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Among them, the number of stator core slots z is 72, and the number of motor rotor poles 2P is 6, so the number of slots per pole per phase Q=4 can be calculated. Then, it can be calculated by formula (1):

[0074]

[0075] When the motor is a six-phase motor with 6 poles and 72 slots, the number of phases of the motor is m=6, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Among them, the number of stator core slots z is 72, and the number of motor rotor poles 2P is 6, so the number of slots per pole per phase Q=2 can be calculated. Then, it can be calculated by formula (1):

[0076]

[0077] In another embodiment, the plurality of first spans are calculated based on the following formula:

[0078]

[0079] In formula (2), Y Q is the first span of the motor stator winding, including y1,

[0080] y2……y Q , there are Q first spans in total, Q is the number of slots per pole per phase, and m is the number of phases of the motor. The calculated Q first spans enable each winding branch to continuously transpose in each Q slot per pole per phase, thereby ensuring the circumferential balance of the potential of each winding branch.

[0081] In some specific embodiments, when the motor is an 8-pole 48-slot three-phase motor, the number of phases of the motor is m=3, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Wherein, the number of stator core slots z is 48, and the number of motor rotor poles 2P is 8, so the number of slots per pole per phase Q=2 can be calculated. Then, it can be calculated by formula (2):

[0082]

[0083] When the motor is a three-phase motor with 6 poles and 54 slots, the number of phases of the motor is m=3, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Among them, the number of stator core slots z is 54, and the number of motor rotor poles 2P is 6, so the number of slots per pole per phase Q=3 can be calculated. Then, it can be calculated by formula (2):

[0084]

[0085] When the motor is a three-phase motor with 6 poles and 72 slots, the number of phases of the motor is m=3, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Among them, the number of stator core slots z is 72, and the number of motor rotor poles 2P is 6, so the number of slots per pole per phase Q=4 can be calculated. Then, it can be calculated by formula (2):

[0086]

[0087] When the motor is a six-phase motor with 6 poles and 72 slots, the number of phases of the motor is m=6, and the number of slots per pole per phase Q is calculated based on the formula z=m×2P×Q. Among them, the number of stator core slots z is 72, and the number of motor rotor poles 2P is 6, so the number of slots per pole per phase Q=2 can be calculated. Then, it can be calculated by formula (2):

[0088]

[0089] In one embodiment, 2n layers of winding wires are arranged in each stator slot of the motor, wherein n is a natural number greater than or equal to 2.

[0090] Preferably, the winding wires are flat copper wires.

[0091] In a specific embodiment, 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.

[0092] In this embodiment, each winding wire includes a plurality of straight segments, and the plurality of straight segments of each winding wire are arranged in the stator slots of the motor.

[0093] In one embodiment, the arrangement of the multiple straight segments of each winding conductor in the stator slot of the motor is as follows: among the multiple straight segments, two straight segments that are adjacent in sequence and located in the same layer in the stator slot are a group, and each two adjacent groups of straight segments are respectively arranged in the odd layers and the even layers in the 2n layers.

[0094] Specifically, during the winding process of the winding wire, there may be a situation of winding across layers in the stator slot, for example, a straight line segment of the winding wire is in the L1 layer, and the straight line segment adjacent to the straight line segment is arranged in the L2 layer. In this embodiment, when there are two adjacent straight line segments, and the two straight line segments are in the same layer in the stator slot (i.e., no cross-layer is performed), the two straight line segments are determined as the first group, and the other two adjacent straight line segments in the same layer in the stator slot are determined as the second group in sequence, and so on, multiple straight line segments of a winding wire are determined as multiple groups. In the multiple groups of straight line segments determined, each two adjacent groups of straight line segments are arranged in the odd layers and even layers of the 2n layers of the stator slot, respectively. For example, two straight line segments in the first group of straight line segments are arranged in the odd layers of the stator slot, two straight line segments in the second group of straight line segments adjacent to the first group of straight line segments are arranged in the even layers of the stator slot, and two straight line segments in the third group of straight line segments adjacent to the second group of straight line segments are arranged in the odd layers, and so on.

[0095] 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.

[0096] In one embodiment, the arrangement of the multiple straight segments of each winding wire in the stator slots of the motor is as follows: among the multiple straight segments, every two adjacent straight segments are arranged in odd-numbered layers and even-numbered layers in the 2n layers respectively.

[0097] Specifically, the multiple straight line segments of each winding conductor are alternately arranged in the odd-numbered layers and the even-numbered layers in sequence, that is, every two adjacent straight line segments are arranged in the odd-numbered layers and the even-numbered layers, respectively, so as to realize the continuous cross-layer of the multiple straight line segments. For example, the multiple straight line segments respectively include a first straight line segment, a second straight line segment, a third straight line segment, etc. in sequence, wherein the first straight line segment is arranged in the odd-numbered layers of the even-numbered layers of the stator slot, the second straight line segment adjacent to the first straight line segment is arranged in the even-numbered layers, the third straight line segment adjacent to the second straight line segment is arranged in the odd-numbered layers, and so on.

[0098] 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.

[0099] In one embodiment, the stator windings of the motor share Q winding conductors formed by continuous bending, and the second spans of the straight segments of the Q types of winding conductors formed by continuous bending are respectively the same as the first spans. Where Q is the number of slots per pole and per phase.

[0100] Optionally, the spans of the straight segments of the first type of continuously bent winding wire are y1, y2, ..., y Q , …, y1, y2, …, y Q The spans of the straight segments of the second type of continuously bent winding wire are y2, ..., yQ ,y1…,y2,…,y Q , y1, ...; the spans of the straight segments of the Qth type of continuously bent winding wires are y Q ,y1,y2,…,…,y Q ,y1,y2,….

[0101] In one embodiment, the winding wire also includes a bent section, which is used to connect two adjacent straight sections. Each winding wire is arranged in the stator slot for n turns, and each winding wire is arranged with a total of 2P straight sections in one turn around the stator. The number of straight sections and bent sections of each winding wire is 2P×n; wherein P is the number of poles of the motor rotor.

[0102] The winding wire is arranged in n layers of the motor stator slots. The winding wire needs to be arranged in 2P straight segments for one circle around the stator, where P is the number of poles of the motor stator. Each type of continuously bent winding wire is arranged in the motor stator slots for n circles, so each type of continuously bent winding wire has 2P×n straight segments and bent segments.

[0103] In this embodiment, the bent winding conductor also includes a bent section, which is used to connect two connected straight line segments. The distance between the two connected straight line segments is the span. The pre-formed bent section can be used to arrange the straight line segments according to the first span. There is no need to select the motor stator slots for winding according to the first span during the winding process, thereby improving the winding efficiency of the motor stator winding.

[0104] In one embodiment, each phase winding uses 2Q continuously bent winding wires, Q is the number of slots per pole per phase, and the number of branches of each phase winding formed by the 2Q continuously bent winding wires is 2Q, Q, 2 or 1.

[0105] In this embodiment, each phase winding uses 2Q continuous bend-shaped winding conductors, that is, each type of bend-shaped winding conductor in each phase winding uses two, and the m-phase winding uses a total of 2Q×m continuous bend-shaped winding conductors. The 2Q continuous bend-shaped winding conductors can form windings with different branches. When each continuous bend-shaped winding conductor is a branch, each phase winding has a total of 2Q branches. When every two continuous bend-shaped winding conductors are connected end to end to form a branch, each phase winding has a total of Q branches. When Q continuous bend-shaped winding conductors are connected end to end in sequence to form a branch, each phase winding has a total of 2 branches. When 2Q continuous bend-shaped winding conductors are connected end to end in sequence, each phase winding has a total of 1 branch.

[0106] In a specific implementation, the number of phases of the motor is m=3, the number of stator pole pairs of the motor is P=3, the number of slots per pole per phase is Q=3, and the number of stator slots of the motor is z=m×2P×Q=54, that is, the motor is a 6-pole 54-slot three-phase motor. Its winding span combination is:

[0107] or

[0108] Figure 3 FIG. 4 shows a schematic diagram of the winding of the U-phase winding of an embodiment. Figure 3 As shown, when the motor winding span combination adopts Eight layers of winding wires are arranged in each stator slot of the motor. Among the multiple straight line segments of each winding wire, two adjacent straight line segments in the same layer in the stator slot are grouped together, and each two adjacent groups of straight line segments are arranged in odd-numbered layers and even-numbered layers of the eight layers, respectively.

[0109] like Figure 3 As shown, the U-phase winding has a total of 6 continuously bent winding conductors, which are named 1a, 2b, 3c, 1j, 2k, and 3l respectively. There are three types of continuously bent winding conductors. Winding conductors 1a and 1j are of one type, and their span combinations are 10, 10, 7..., with a total of 2×3×4=24 spans and straight segments. Winding conductors 2b and 2k are of one type, and their span combinations are 10, 7, 10..., with a total of 2×3×4=24 spans and straight segments. The group conductors 3c and 3l are of the same type, and their span combinations are 7, 10, 10..., with a total of 2×3×4=24 spans and straight line segments. The beginning of each winding conductor is marked as 1, where the current flows in, and the end is marked as 24, where the current flows out; in the winding conductors 1a, 2b, 3c, 1j, 2k, and 3l, two adjacent straight line segments in the same layer in each winding conductor are grouped together, and two adjacent groups of straight line segments are arranged in odd layers and even layers, respectively.

[0110] Taking the winding conductor 1a as an example, it includes 1-24 straight line segments, among which the 1st straight line segment to the 2nd straight line segment forms a cross-layer, from the L1 layer to the L2 layer, the 3rd straight line segment is connected to the 2nd straight line segment and both are in the L2 layer, then the 2nd straight line segment and the 3rd straight line segment constitute the first group of straight line segments, the 4th straight line segment is in the L1 layer, and compared with the 3rd straight line segment, it forms a cross-layer, the 5th straight line segment is connected to the 4th straight line segment and they are also in the L1 layer, then the 4th straight line segment and the 5th straight line segment constitute the second group of straight line segments, similarly, the 8th straight line segment and the 9th straight line segment constitute the third group of straight line segments.

[0111] Among them, the first group of straight line segments is in the L2 layer (i.e., the even layer), the second group of straight line segments adjacent to the first group of straight line segments is in the L1 layer (i.e., the odd layer), and the third group of straight line segments is in the L4 layer (i.e., the even layer), and so on, each two adjacent groups of straight line segments are arranged in the odd layers and the even layers respectively.

[0112] Figure 4 A winding diagram of a three-phase winding according to an embodiment is shown. Figure 4 As shown, the three-phase windings U, V, and W each use 6 continuously bent winding wires, for a total of 18 wires. The 6 wires of the V-phase winding are respectively named 1g, 2h, 3i, 1p, 2q, and 3r, and the 6 wires of the W-phase winding are respectively named 1d, 2e, 3f, 1m, 2n, and 3o. In the three-phase windings U, V, and W, there are three types of continuously bent winding wires, among which 1a, 1j, 1g, 1p, 1d, and 1m are a type of continuously bent winding wire, and their span combinations are all 10, 10, 7…, 2b, 2k, 2h, 2q, 2e, and 2n are a type of continuously bent winding wire, and their span combinations are all 10, 7, 10…, 3c, 3l, 3i, 3r, 3f, and 3o are a type of continuously bent winding wire, and their span combinations are all 7, 10, 10….

[0113] In this embodiment, each phase of the three-phase windings U, V, and W includes 6 winding conductors that are continuously bent.

[0114] When the six continuously bent winding wires of each phase are connected in parallel, that is, the current enters at the head end of the six continuously bent winding wires and flows out at the tail end, each phase includes six parallel branches, such as Figure 5 shown.

[0115] When every two of the six continuously bent winding wires of each phase are connected in series end to end to form three groups of winding wires, the three groups of winding wires are connected in parallel, and each phase includes three parallel branches, such as Figure 6 shown.

[0116] When three of the six continuously bent winding conductors of each phase are connected in series end to end to form two groups of winding conductors, the two groups of winding conductors are connected in parallel, and each phase includes two parallel branches, such as Figure 7 shown.

[0117] Figure 8 FIG. 4 shows a U-phase winding diagram of another embodiment. In this embodiment, as shown in FIG. Figure 8 As shown, when the motor winding span combination adopts Each motor stator slot is provided with 8 layers of winding wires, and among the multiple straight segments of each winding wire, each adjacent two straight segments are arranged in odd-numbered layers and even-numbered layers of the 8 layers, respectively. That is, among the multiple straight segments of the winding wire, each adjacent two straight segments are arranged alternately in odd-numbered layers and even-numbered layers.

[0118] like Figure 8 As shown, the U-phase winding has a total of 6 continuously bent winding conductors, which are named 1a, 2b, 3c, 1j, 2k, and 3l respectively. There are three types of continuously bent winding conductors. Winding conductors 1a and 1j are of one type, and their span combinations are 11, 8, 8..., with a total of 2×3×4=24 spans and straight line segments. Winding conductors 2b and 2k are of one type, and their span combinations are 8, 11, 8..., with a total of 2×3×4=24 spans and straight line segments. The winding wires 3c and 3l are of the same type, and their span combinations are all 8, 8, 11..., with a total of 2×3×4=24 spans and straight segments. The head end of each winding wire is marked as 1, where the current flows in, and the end is marked as 24, where the current flows out; in the winding wires 1a, 2b, 3c, 1j, 2k, and 3l, in the multiple straight segments of each winding wire, each adjacent two straight segments are arranged in the odd and even layers of the 8 layers, respectively. That is, in the multiple straight segments of the winding wire, each adjacent two straight segments are arranged alternately in the odd and even layers.

[0119] Taking the winding conductor 1a as an example, it includes 1-24 straight line segments, wherein a cross-layer is formed between each adjacent two straight line segments from the 1st straight line segment to the 24th straight line segment. The 1st straight line segment is in the L1 layer (i.e., the odd-numbered layer), the 2nd straight line segment is in the L2 layer (i.e., the even-numbered layer), the 3rd straight line segment is in the L1 layer (i.e., the odd-numbered layer), and so on, each adjacent two straight line segments are arranged in the odd-numbered layer and the even-numbered layer, respectively.

[0120] Fig. 9 A winding diagram of a three-phase winding of another embodiment is shown. Fig. 9 As shown, the three-phase windings U, V, and W each use 6 continuously bent winding conductors, for a total of 18 conductors. The 6 conductors of the V-phase winding are respectively named 1g, 2h, 3i, 1p, 2q, and 3r, and the 6 conductors of the W-phase winding are respectively named 1d, 2e, 3f, 1m, 2n, and 3o. In the three-phase windings U, V, and W, there are three types of continuously bent winding conductors, of which 1a, 1j, 1g, 1p, 1d, and 1m are a type of continuously bent winding conductor, and their span combinations are all 11, 8, 8…, 2b, 2k, 2h, 2q, 2e, and 2n are a type of continuously bent winding conductor, and their span combinations are all 8, 11, 8…, and 3c, 3l, 3i,

[0121] 3r, 3f, 3o are winding conductors formed by continuous bending, and their span combinations are 11, 8, 8...

[0122] In this embodiment, each phase of the three-phase windings U, V, and W includes 6 winding conductors that are continuously bent.

[0123] When the six continuously bent winding wires of each phase are connected in parallel, that is, the current enters at the head end of the six continuously bent winding wires and flows out at the tail end, each phase includes six parallel branches, such as Fig.10 shown.

[0124] When every two of the six continuously bent winding wires of each phase are connected in series end to end to form three groups of winding wires, the three groups of winding wires are connected in parallel, and each phase includes three parallel branches, such as Fig.11 shown.

[0125] When three of the six continuously bent winding conductors of each phase are connected in series end to end to form two groups of winding conductors, the two groups of winding conductors are connected in parallel, and each phase includes two parallel branches, such as Fig.12 shown.

[0126] Fig.13 FIG. 4 shows a U-phase winding diagram of another embodiment. In this embodiment, as shown in FIG. Figure 8 As shown, when the motor winding span combination adopts Eight layers of winding wires are arranged in each stator slot of the motor. Among the multiple straight segments of each winding wire, two straight segments that are adjacent in sequence and located in the same layer in the stator slot are a group, and each two adjacent groups of straight segments are arranged in odd-numbered layers and even-numbered layers among the eight layers, respectively.

[0127] like Fig.13 As shown, the U-phase winding has 6 continuously bent winding conductors, which are named 1a, 2b, 3c, 1j, 2k, and 3l. There are three types of continuously bent winding conductors. Winding conductors 1a and 1j are of one type, and their span combinations are 11, 8, 8..., with a total of 2×3×4=24 spans and straight segments. Winding conductors 2b and 2k are of one type, and their span combinations are 8, 11, 8..., with a total of 2×3×4=24 spans and straight segments. Wires 3c and 3l are of the same type, and their span combinations are 8, 8, 11..., with a total of 2×3×4=24 spans and straight line segments. The beginning of each winding wire is marked as 1, where the current flows in, and the end is marked as 24, where the current flows out; in winding wires 1a, 2b, 3c, 1j, 2k, and 3l, two adjacent straight line segments in the same layer in each winding wire are grouped together, and two adjacent groups of straight line segments are arranged in odd layers and even layers, respectively.

[0128] Taking the winding conductor 1a as an example, it includes 1-24 straight line segments, among which the 1st straight line segment to the 2nd straight line segment forms a cross-layer, from the L1 layer to the L2 layer, the 3rd straight line segment is connected to the 2nd straight line segment and both are in the L2 layer, then the 2nd straight line segment and the 3rd straight line segment constitute the first group of straight line segments, the 4th straight line segment is in the L1 layer, and compared with the 3rd straight line segment, it forms a cross-layer, the 5th straight line segment is connected to the 4th straight line segment and they are also in the L1 layer, then the 4th straight line segment and the 5th straight line segment constitute the second group of straight line segments, similarly, the 8th straight line segment and the 9th straight line segment constitute the third group of straight line segments.

[0129] Among them, the first group of straight line segments is in the L2 layer (i.e., the even layer), the second group of straight line segments adjacent to the first group of straight line segments is in the L1 layer (i.e., the odd layer), and the third group of straight line segments is in the L4 layer (i.e., the even layer), and so on, each two adjacent groups of straight line segments are arranged in the odd layers and the even layers respectively.

[0130] Fig.14 A winding diagram of a three-phase winding of another embodiment is shown. Fig.14 As shown, the three-phase windings U, V, and W each use 6 continuously bent winding wires, for a total of 18 wires. The 6 wires of the V-phase winding are respectively named 1g, 2h, 3i, 1p, 2q, and 3r, and the 6 wires of the W-phase winding are respectively named 1d, 2e, 3f, 1m, 2n, and 3o. In the three-phase windings U, V, and W, there are three types of continuously bent winding wires, among which 1a, 1j, 1g, 1p, 1d, and 1m are a type of continuously bent winding wire, and their span combinations are all 11, 8, 8..., 2b, 2k, 2h, 2q, 2e, and 2n are a type of continuously bent winding wire, and their span combinations are all 8, 11, 8..., and 3c, 3l, 3i, 3r, 3f, and 3o are a type of continuously bent winding wire, and their span combinations are all 11, 8, 8...

[0131] In this embodiment, each phase of the three-phase windings U, V, and W includes 6 winding conductors that are continuously bent.

[0132] When the six continuously bent winding wires of each phase are connected in parallel, that is, the current enters at the head end of the six continuously bent winding wires and flows out at the tail end, each phase includes six parallel branches, such as Fig.15 shown.

[0133] When every two of the six continuously bent winding wires of each phase are connected in series end to end to form three groups of winding wires, the three groups of winding wires are connected in parallel, and each phase includes three parallel branches, such as Fig.16 shown.

[0134] When three of the six continuously bent winding conductors of each phase are connected in series end to end to form two groups of winding conductors, the two groups of winding conductors are connected in parallel, and each phase includes two parallel branches, such as Fig.17 shown.

[0135] In a specific implementation, the number of phases of the motor is m=3, the number of stator pole pairs of the motor is P=4, the number of slots per pole per phase is Q=2, and the number of stator slots of the motor is z=m×2P×Q=48, that is, the motor is an 8-stage 48-slot three-phase motor. Its winding span combination is:

[0136] or

[0137] Fig.18 FIG. 4 shows a winding diagram of a U-phase winding of an embodiment, as shown in FIG. Fig.18 As shown, 6 layers of winding wires are arranged in each stator slot of the motor. Among the multiple straight segments of each winding wire, two straight segments that are adjacent in sequence and located in the same layer in the stator slot are a group, and each two adjacent groups of straight segments are arranged in the odd layers and the even layers of the 8 layers respectively.

[0138] like Fig.18 As shown, the U-phase winding has a total of 4 continuously bent winding conductors, which are named 1a, 2b, 1g, and 2h respectively. There are two types of continuously bent winding conductors. Winding conductors 1a and 1g are of one type, and their span combinations are 7, 5, 7, 5..., with a total of 2×4×3=24 spans and straight segments; winding conductors 2b and 2h are of one type, and their span combinations are 5, 7, 5, 7..., with a total of 2×3×4=24 spans and straight segments. The head end of each winding conductor is marked as 1, where the current flows in, and the end is marked as 24, where the current flows out; in the winding conductors 1a, 2b, 1g, and 2h, two adjacent straight segments in the same layer in each winding conductor are grouped together, and the two adjacent groups of straight segments are arranged in odd layers and even layers, respectively.

[0139] Taking 1a of the winding conductor as an example, it includes 1-24 straight line segments, among which the 1st straight line segment to the 2nd straight line segment forms a cross-layer, from the L1 layer to the L2 layer, the 3rd straight line segment is connected to the 2nd straight line segment and both are in the L2 layer, then the 2nd straight line segment and the 3rd straight line segment constitute the first group of straight line segments, the 4th straight line segment is in the L1 layer, and compared with the 3rd straight line segment, a cross-layer is formed, the 5th straight line segment is connected to the 4th straight line segment and they are also in the L1 layer, then the 4th straight line segment and the 5th straight line segment constitute the second group of straight line segments, and similarly, the 6th straight line segment and the 7th straight line segment constitute the third group of straight line segments.

[0140] Among them, the first group of straight line segments is in the L2 layer (i.e., the even layer), the second group of straight line segments adjacent to the first group of straight line segments is in the L1 layer (i.e., the odd layer), and the third group of straight line segments is in the L2 layer (i.e., the even layer), and so on, each two adjacent groups of straight line segments are arranged in the odd layer and the even layer respectively.

[0141] Fig.19A winding diagram of a three-phase winding according to an embodiment is shown. Fig.19 As shown, the U, V, and W three-phase windings each use 4 continuously bent winding wires, for a total of 12 wires. The 4 wires of the V-phase winding are respectively named 1e, 2f, 1k, and 2l, and the 4 wires of the W-phase winding are respectively named 1c, 2d, 1i, and 2j; in the U, V, and W three-phase windings, there are two types of continuously bent winding wires, of which 1a, 1c, 1e, 1g, 1i, and 1k are one type of continuously bent winding wires, and their span combinations are all 7, 5, 7, 5…, and 2b, 2d, 2f, 2h, 2j, and 2l are one type of continuously bent winding wires, and their span combinations are all 5, 7, 5, 7….

[0142] In this embodiment, each phase of the three-phase windings U, V, and W includes four winding conductors that are continuously bent.

[0143] When the four continuously bent winding wires of each phase are connected in parallel, that is, the current enters at the head end of the four continuously bent winding wires and flows out at the tail end, each phase includes four parallel branches, such as Fig. 20 shown.

[0144] When two of the four continuously bent winding conductors of each phase are connected in series end to end to form two groups of winding conductors, the two groups of winding conductors are connected in parallel, and each phase includes two parallel branches, such as Fig.21 shown.

[0145] In a specific implementation, the number of phases of the motor is m=3, the number of stator pole pairs of the motor is P=3, the number of slots per pole per phase is Q=4, and the number of stator slots of the motor is z=m×2P×Q=72, that is, the motor is a 6-pole 72-slot three-phase motor. Its winding span combination is:

[0146]

[0147] Fig. 22 FIG. 4 shows a winding diagram of a U-phase winding of an embodiment, as shown in FIG. Fig. 22 As shown, 6 layers of winding wires are arranged in each stator slot of the motor. Among the multiple straight segments of each winding wire, two straight segments that are adjacent in sequence and located in the same layer in the stator slot are a group, and each two adjacent groups of straight segments are arranged in the odd layers and the even layers of the 8 layers respectively.

[0148] like Fig. 22 As shown, the U-phase winding has a total of 8 continuously bent winding wires, which are named 1a, 2b, 3c, 4d, 1m, 2v, 3o, and 4p respectively. There are four types of winding wires. Winding wires 1a and 1m are of one type, and their span combinations are 15, 11, 11, 11..., with a total of 2×3×3=18 spans and straight segments. Winding wires 2b and 2v are of one type, and their span combinations are 11,

[0149] 15, 11, 11…, a total of 2×3×3=18 spans and straight segments, winding wires 3c and 3o are of one kind, and their span combinations are 11, 11, 15, 11…, a total of 2×3×3=18 spans and straight segments, winding wires 4d and 4p are of one kind, and their span combinations are 11, 11, 11, 15…, a total of 2×3×3=18 spans and straight segments, the beginning of each winding wire is marked as 1, and the beginning is the current flowing in in, and the end is marked as 18, and the end is the current flowing out out; in winding wires 1a, 2b, 3c, 4d, 1m, 2v, 3o, 4p, two adjacent straight segments in the same layer in each winding wire are divided into a group, and the two adjacent groups of straight segments are arranged in odd layers and even layers respectively.

[0150] Taking 1a of the winding conductor as an example, it includes 1-18 straight line segments, among which the 1st straight line segment to the 2nd straight line segment forms a cross-layer, from the L1 layer to the L2 layer, the 3rd straight line segment is connected to the 2nd straight line segment and both are in the L2 layer, then the 2nd straight line segment and the 3rd straight line segment constitute the first group of straight line segments, the 4th straight line segment is in the L1 layer, and compared with the 3rd straight line segment, a cross-layer is formed, the 5th straight line segment is connected to the 4th straight line segment and they are also in the L1 layer, then the 4th straight line segment and the 5th straight line segment constitute the second group of straight line segments, similarly, the 8th straight line segment and the 9th straight line segment constitute the third group of straight line segments.

[0151] Among them, the first group of straight line segments is in the L2 layer (i.e., the even layer), the second group of straight line segments adjacent to the first group of straight line segments is in the L1 layer (i.e., the odd layer), and the third group of straight line segments is in the L4 layer (i.e., the even layer), and so on, each two adjacent groups of straight line segments are arranged in the odd layers and the even layers respectively.

[0152] Fig.23 A winding diagram of a three-phase winding according to an embodiment is shown. Fig.23 As shown in the figure, each of the U, V, and W three-phase windings uses 8 continuously bent winding wires, a total of 24 wires, the 4 wires of the V-phase winding are named 1i, 2j, 3k, 4l, 1w, 2x, 3y, and 4z, and the 8 wires of the W-phase winding are named 1e, 2f, 3g, 4h, 1q, 2r, 3s, and 4t; in the U, V, and W three-phase windings, there are 4 types of winding wires, of which 1a, 1e, 1i, 1m, 1q, and 1w are one type of winding wire. The span combinations are all 15, 11, 11, 11…, 2b, 2f, 2j, 2v, 2r, 2x are a type of winding wire, and their span combinations are all 11, 15, 11, 11…, 3c, 3g, 3k, 3o, 3s, 3y are a type of winding wire, and their span combinations are all 11, 11, 15, 11…, 4d, 4h, 4l, 4p, 4t, 4z are a type of winding wire, and their span combinations are all 11, 11, 11, 15…

[0153] In this embodiment, each phase of the three-phase windings U, V, and W includes 8 winding conductors that are continuously bent.

[0154] When the eight continuously bent winding conductors of each phase are connected in parallel, that is, the current enters at the head ends of the eight continuously bent winding conductors and flows out at the tail ends, each phase includes eight parallel branches.

[0155] When every two of the eight continuously bent winding wires of each phase are connected in series end to end to form four groups of winding wires, the four groups of winding wires are connected in parallel, and each phase includes four parallel branches, such as Fig.24 shown.

[0156] When each of the 8 continuously bent winding wires of each phase is connected in series end to end to form 2 sets of winding wires, the 2 sets of winding wires are connected in parallel, and each phase includes 2 parallel branches, such as Fig.24 shown.

[0157] The above implementations are only partial examples, and not all of them are shown. When the number of slots per pole per phase Q, the number of rotor poles P, and the number of phases m change, we can quickly obtain the required continuous wave winding according to the above invention, and its span is determined by Q and P. There are two types of straight line segment distribution forms. The first type is that adjacent straight line segments are arranged alternately in odd and even layers, and the second type is that two adjacent straight line segments are arranged in odd layers, and the latter two straight line segments are arranged in even layers, or two adjacent straight line segments are arranged in even layers, and the latter two straight line segments are arranged in odd layers. There are Q types of winding wires, and 2Q winding wires per phase winding make the number of parallel winding branches flexible to 2Q, Q, 2, 1, etc. The above embodiments enable the winding design to cover different pole slot combinations, and the advantages of balanced potential of different branch numbers. At the same time, the two arrangements can also avoid the problem of wire damage caused by parallel stacking of multiple winding wires, and reduce the problem of braiding multiple winding wires.

[0158] Another embodiment of the present invention provides a motor, including a stator and a rotor, wherein the winding of the stator is wound based on the winding method of the motor stator winding according to any of the above embodiments.

[0159] Another embodiment of the present invention provides a vehicle, which includes the motor according to any one of the above embodiments.

[0160] 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 method for winding a motor stator winding, characterized in that: include: Determine the number of slots per pole per phase of the motor stator and the number of phases of the motor; Calculating a plurality of first spans of the stator winding of the motor according to the number of slots per pole per phase and the number of phases, wherein the plurality of first spans are different or partially the same; The motor stator winding is wound based on a plurality of the first spans, so that the motor stator winding is continuously transposed in a plurality of the per-pole per-phase slots.

2. The method for winding a motor stator winding according to claim 1, characterized in that: The first plurality of spans are calculated based on the following formula: Where Y Q is the first span of the stator winding of the motor, including y1, y2, ..., y Q , Q is the number of slots per pole per phase, and m is the number of phases of the motor.

3. The method for winding a motor stator winding according to claim 1, characterized in that: The first plurality of spans are calculated based on the following formula: Where Y Q is the first span of the stator winding of the motor, including y1, y2, ..., y Q , Q is the number of slots per pole per phase, and m is the number of phases of the motor.

4. The method for winding a motor stator winding according to any one of claims 1 to 3, characterized in that: Each motor stator slot is provided with 2n layers of winding wires, where n is a natural number greater than or equal to 2; Each of the winding wires includes a plurality of straight segments, and the plurality of straight segments are arranged in the stator slots of the motor; The arrangement of the plurality of straight segments of each winding conductor in the stator slot of the motor is as follows: Among the plurality of straight line segments, two straight line segments that are adjacent in sequence and located in the same layer in the stator slot form a group, and each two adjacent groups of straight line segments are respectively arranged in odd-numbered layers and even-numbered layers in the 2n layers.

5. The method for winding a motor stator winding according to any one of claims 1 to 3, characterized in that: Each motor stator slot is provided with 2n layers of winding wires, where n is a natural number greater than or equal to 2; Each of the winding wires includes a plurality of straight segments, and the plurality of straight segments are arranged in the stator slots of the motor; The arrangement of the plurality of straight segments of each winding conductor in the stator slot of the motor is as follows: Among the plurality of straight line segments, every two adjacent straight line segments are respectively arranged in odd-numbered layers and even-numbered layers in the 2n layers.

6. The method for winding a motor stator winding according to any one of claims 1 to 3, characterized in that: The motor stator winding shares Q types of winding wires formed by continuous bending, and the second spans of the straight segments of the Q types of winding wires are respectively the same as a plurality of the first spans, wherein Q is the number of slots per pole per phase.

7. The method for winding the motor stator winding according to claim 6, characterized in that: The continuously bent winding conductor also includes a bent segment, which is used to connect two adjacent straight segments. Each type of continuously bent winding conductor is arranged in the stator slot for n turns. Each type of continuously bent winding conductor has a total of 2P straight segments arranged around the stator. The number of straight segments and bent segments of each type of continuously bent winding conductor is 2P×n; wherein P is the number of poles of the motor rotor.

8. The method for winding the motor stator winding according to claim 7, characterized in that: Each phase winding adopts 2Q winding conductors formed by continuous bending, Q is the number of slots per pole per phase, and the number of branches of each phase winding formed by the 2Q winding conductors formed by continuous bending is 2Q, Q, 2 or 1.

9. A motor, characterized in that: It comprises a stator and a rotor, wherein the winding of the stator is wound based on the winding method of the motor stator winding according to any one of claims 1 to 8.

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

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