Stator assembly, motor and vehicle

Abstract

The invention provides a stator assembly, a motor and a vehicle, and the stator assembly comprises a stator iron core, and the radial inner surface of the stator iron core is provided with stator grooves which are uniformly distributed in the circumferential direction; the stator winding is a multi-phase winding and is formed by winding conductors, at least one part of the stator winding is arranged in the stator slots, 2n layers of conductors are arranged in each stator slot, and n is a natural number; each phase of stator winding comprises a plurality of hairpin coils, and each hairpin coil is provided with a crown end, a torsion head end and two straight line segments connected with the crown end and the torsion head end; the plurality of card issuing coils comprise a first card issuing coil with a first straight line segment span y1, a second card issuing coil with a second straight line segment span y2 and a third card issuing coil with a third straight line segment span y3, and y1, y2 and y3 meet the following first rule: y1 = Q * m, y2 = y1 + 1 and y3 = y2-Q; or y1, y2 and y3 meet the following second rule: y1 = Q * m, y2 = y1-1, and y3 = y2 + Q.

Description

Technical Field

[0001] The present application relates to the technical field of motor stators, and in particular, to a stator assembly, a motor and a vehicle. Background Art

[0002] For multi-phase motors, different slot numbers Q per pole per phase can be used to design the stator winding, that is, the number of poles and slots of the stator winding can be matched in different ways. For example, for a three-phase motor, when Q=2, the stator winding can choose a pole-slot match of 36 slots and 6 poles, 48 ​​slots and 8 poles, 60 slots and 10 poles, etc., and when Q=3, it can choose a pole-slot match of 54 slots and 6 poles, 72 slots and 8 poles, 90 slots and 10 poles, etc. For a six-phase motor, when Q=2, the stator winding can choose a pole-slot match of 72 slots and 6 poles, 96 slots and 8 poles, 120 slots and 10 poles, etc., and when Q=3, it can choose a pole-slot match of 108 slots and 6 poles, 144 slots and 8 poles, etc.

[0003] In addition, for flat wire stator windings, in order to avoid AC loss problems at high speeds, multiple branches are usually set in parallel when designing each phase winding to obtain a suitable number of turns. When each phase winding has multiple branches in parallel, 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 large harmonic electromotive force and circulating current, which may cause motor heating, NVH vibration noise and other problems.

[0004] In known multi-phase motors, for each motor with different pole-slot combinations and different numbers of branches, the winding scheme of the stator winding is usually redesigned individually to obtain a preferred design scheme matching the different motors.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] One aspect of the present application is to solve a technical problem of how to efficiently design a stator winding so that it can be applicable to a variety of motors with different pole slot combinations and different numbers of branches.

[0007] In addition, other aspects of the present application are also intended to solve or alleviate other technical problems existing in the prior art.

[0008] The present application provides a stator assembly, a motor and a vehicle. Specifically, according to one aspect of the present application, the present application provides:

[0009] A stator assembly, comprising:

[0010] A stator core, wherein the radial inner surface of the stator core is provided with stator slots evenly distributed in the circumferential direction;

[0011] A stator winding, wherein the stator winding is a multi-phase winding, which is formed by winding a conductor and at least a part of which is arranged in the stator slot, and 2n layers of conductors are arranged in each stator slot, where n is a natural number;

[0012] Each phase of the stator winding includes a plurality of hairpin coils, each of which has a crown end, a twist end, and two straight line segments connecting the crown end and the twist end;

[0013] The plurality of card-issuing coils include a first card-issuing coil having a first straight line segment span y1, a second card-issuing coil having a second straight line segment span y2, and a third card-issuing coil having a third straight line segment span y3, wherein y1, y2, and y3 satisfy the following first rule:

[0014] y1=Q*m, y2=y1+1, y3=y2-Q;

[0015] Or, y1, y2 and y3 satisfy the following second rule:

[0016] y1=Q*m, y2=y1-1, y3=y2+Q;

[0017] Among them, m is the number of phases, and Q is the number of slots per pole and per phase.

[0018] Optionally, according to an embodiment of the present application, the two straight line segments of each of the hairpin coils are respectively arranged in adjacent conductor layers, and the twist end spans of the multiple hairpin coils are equal and are all the first straight line segment spans.

[0019] Optionally, according to an embodiment of the present application, when the number of stator winding branches per phase is 1, the windings of two adjacent layers of each branch per phase include a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is 2Q*(P-1), the number of the second hairpin coil is 2*(Q-1), and the number of the third hairpin coil is 2;

[0020] Or, the number of the first card issuing coils is 2Q, the number of the second card issuing coils is 2*(Q-1)*(P-1), and the number of the third card issuing coils is 2*(P-1);

[0021] Where P is the number of pole pairs.

[0022] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil, a second card-hairpin coil and a third card-hairpin coil, wherein the number of the first card-hairpin coil is Q*(P-1), the number of the second card-hairpin coil is Q-1, and the number of the third card-hairpin coil is 1;

[0023] Or, the number of the first card issuing coils is Q, the number of the second card issuing coils is (Q-1)*(P-1), and the number of the third card issuing coils is P-1;

[0024] Where P is the number of pole pairs.

[0025] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is 2*(P-1), and the number of the third hairpin coil is 2;

[0026] Or, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil and a second card-hairpin coil, wherein the number of the first card-hairpin coils is 2*(P-1), and the number of the second card-hairpin coils is 2;

[0027] Where P is the number of pole pairs.

[0028] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the two adjacent layers of windings of each phase include a first card-pin coil, a second card-pin coil and a third card-pin coil, wherein the number of the first card-pin coil is 2Q*(P-1), the number of the second card-pin coil is 2*(Q-1), and the number of the third card-pin coil is 2.

[0029] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a second hairpin coil, wherein the number of the first hairpin coil is 2, and the number of the second hairpin coil is 2*(P-1);

[0030] Or, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil, a second card-hairpin coil and a third card-hairpin coil, wherein the number of the first card-hairpin coil is 2, the number of the second card-hairpin coil is P-1, and the number of the third card-hairpin coil is P-1;

[0031] Where P is the number of pole pairs.

[0032] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the two adjacent layers of windings of each phase include a first card-hairing coil, a second card-hairing coil and a third card-hairing coil, wherein the number of first card-hairing coils is 2Q, the number of second card-hairing coils is 2*(Q-1)*(P-1), and the number of third card-hairing coils is 2*(P-1).

[0033] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is P-1, and the number of the third hairpin coil is 1;

[0034] Or, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a second hairpin coil, wherein the number of the first hairpin coil is P-1, and the number of the second hairpin coil is 1;

[0035] Where P is the number of pole pairs.

[0036] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each phase include a first card-pin coil, a second card-pin coil and a third card-pin coil, wherein the number of first card-pin coils is 2Q*(P-1), the number of second card-pin coils is 2*(Q-1), and the number of third card-pin coils is 2.

[0037] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a second hairpin coil, wherein the number of the first hairpin coil is 1, and the number of the second hairpin coil is (P-1);

[0038] Or, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is 1, the number of the second hairpin coil is P-2, and the number of the third hairpin coil is 1;

[0039] Where P is the number of pole pairs.

[0040] Optionally, according to an embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each phase include a first card-pin coil, a second card-pin coil and a third card-pin coil, wherein the number of first card-pin coils is 2Q, the number of second card-pin coils is 2*(Q-1)*(P-1), and the number of third card-pin coils is 2*(P-1).

[0041] According to another aspect of the present application, the present application provides an electric motor, wherein the electric motor includes the stator assembly described above.

[0042] According to still another aspect of the present application, the present application provides a vehicle, wherein the vehicle includes the motor described above.

[0043] Benefits of this application include:

[0044] 1. The stator assembly of the present application adopts a universal design method. The stator winding adopts a hairpin coil with a specific span combination, and the span of the hairpin coil is associated with the number of slots per pole per phase and the number of motor phases, thereby realizing a universal design of the stator winding, which can be applied to motors with different numbers of slots per pole per phase and different numbers of phases, saving design costs and shortening the design cycle;

[0045] 2. The stator assembly of the present application adopts a hairpin coil with a specific span combination, so that each branch of the winding is transposed in Q slots per pole per phase, thereby ensuring the circumferential balance of the potential of each branch of the winding. At the same time, the straight segments of the hairpin coil are alternately arranged in the odd-numbered layers and the even-numbered layers of the stator core slot, thereby ensuring the radial balance of the potential of each branch of the winding;

[0046] 3. The stator assembly of the present application adopts different card coil combinations for different numbers of winding branches per phase, so that phase balance between the branches of the stator winding can be achieved under different numbers of branches, reducing the harmonic electromotive force and circulating current between the branches. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] With reference to the accompanying drawings, the above and other features of the present application will become apparent. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which,

[0048] Figure 1 and 2 The winding diagrams of the W-phase a and b branches of the stator assembly of one embodiment of the present application are respectively shown, wherein the number of branches per phase is 2;

[0049] Figure 3 Show according to Figure 1 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0050] Figure 4 Show according to Figure 1 A partial view of the stator assembly of the embodiment at the crown end of the hairpin coil;

[0051] Figure 5 Show according to Figure 1A partial view of the stator assembly of the embodiment at the twist end of the hairpin coil;

[0052] Figure 6 and 7 The winding diagrams of the U-phase a and b branches of the stator assembly of another embodiment of the present application are respectively shown, wherein the number of branches per phase is 2;

[0053] Figure 8 Show according to Figure 6 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0054] Fig. 9 Show according to Figure 6 A partial view of the stator assembly of the embodiment at the crown end of the hairpin coil;

[0055] Fig.10 Show according to Figure 6 A partial view of the stator assembly of the embodiment at the twist end of the hairpin coil;

[0056] Fig.11 and 12 The winding diagrams of the U-phase a and b branches using another arrangement method are shown respectively when the number of branches per phase is 2;

[0057] Fig.13 Show according to Fig.11 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0058] Fig.14 , 15 16 respectively show the winding diagrams of the U-phase a, b, and c branches of the stator assembly of one embodiment of the present application, wherein the number of branches per phase is Q;

[0059] Fig.17 Show according to Fig.14 A U-phase winding diagram of a stator assembly of an embodiment;

[0060] Fig.18 Show according to Fig.14 A winding diagram of a three-phase winding of a stator assembly of an embodiment.

[0061] Figure 19-22 The winding diagrams of the U-phase a, b, c, and d branches of the stator assembly of another embodiment of the present application are respectively shown, wherein the number of branches per phase is Q;

[0062] Fig.23 Show according to Fig.19 A U-phase winding diagram of a stator assembly of an embodiment;

[0063] Fig.24 Show according to Fig.19 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0064] Fig.25 A winding diagram of a U-phase winding using another arrangement when the number of branches per phase is Q is shown;

[0065] Fig.26 Show according to Fig.25 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0066] Figure 27-32 The winding diagrams of the a, b, c, d, e, and f branches of the stator assembly U phase of one embodiment of the present application are shown respectively, wherein the number of branches per phase is 2Q;

[0067] Fig.33 Show according to Fig. 27 A U-phase winding diagram of a stator assembly of an embodiment;

[0068] Fig.34 Show according to Fig. 27 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0069] Fig.35 The winding diagram of the U-phase winding using another arrangement when the number of branches per phase is 2Q is shown;

[0070] Fig.36 Show according to Fig.35 A winding diagram of a three-phase winding of a stator assembly of an embodiment;

[0071] Fig.37 The star connection of three-phase windings with two branches per phase is shown;

[0072] Fig.38 The figure shows the delta connection of three-phase windings with two branches per phase. DETAILED DESCRIPTION

[0073] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the present application.

[0074] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for description and distinction purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components or the order or assembly order of the components.

[0075] The first aspect of the present application provides a stator assembly, which includes a stator core and a stator winding. Stator slots uniformly distributed in the circumferential direction are provided on the radial inner surface of the stator core for arranging the conductors of the stator winding. The stator winding is a multi-phase winding, which is wound by a conductor and at least a part of which is arranged in the stator slot. The stator assembly of the present application can be designed to match motors with different key parameters (especially the number of poles, the number of slots, the number of phases, and the number of branches per phase), so that for different motors, phase balance and low harmonic consumption of each branch of the stator winding can be achieved.

[0076] In order to describe the stator assembly more clearly and intuitively, the key parameters of the stator assembly and their related relationships are introduced in detail below: The number of phases of the stator assembly, that is, the number of phases of the motor is m, m = 3x (x = 1, 2, 3 ...), when m = 3, the three-phase windings are named U, V, W in sequence. The number of poles of the motor rotor is 2P, the number of pole pairs is P, P is a natural number greater than or equal to 2, that is, P = 2, 3, 4 .... The number of slots per pole per phase of the stator core is Q, Q is a natural number greater than or equal to 2, that is, Q = 2, 3, 4 .... The number of slots of the stator core is z, and the relationship between the number of slots z and the number of phases, the number of poles 2P and the number of slots per pole per phase Q is z = m * 2P * Q. The pitch of the stator winding is y, and the relationship between the pitch y and the number of slots Q and the number of poles 2P is y = z / 2P = m * Q. In each stator slot, 2n layers of conductors (flat copper wires in the case of flat wire stator windings) are arranged, where n is a natural number. When n=3, there are 6 layers of conductors in the stator slot. At this time, each layer can be named L1, L2, L3, L4, L5, and L6 from the inner diameter to the outer diameter of the stator. For example, when m=3, P=4, and Q=2, z=3*8*2=48, that is, the motor is an 8-pole 48-slot three-phase motor. When m=3, P=3, and Q=3, z=3*6*3=54, that is, the motor is a 6-pole 54-slot three-phase motor. The number of conductor layers 2n in the stator slot is not directly related to the number of phases m, the number of poles P, and the number of slots per pole per phase Q.

[0077] In one embodiment of the present application, each phase stator winding adopts a Hair-pin winding, which is a flat wire winding form, which has the advantages of increasing the winding filling rate, optimizing the motor structure, and improving the heat dissipation performance. The stator winding includes a plurality of hairpin coils, and the hairpin coils have a crown end, a twist end 4, and two straight line segments connecting the crown end and the twist end 4. The number of stator slots between the two straight line segments of the hairpin coil is defined as the straight line segment span of the hairpin coil. The plurality of hairpin coils of the stator winding of the present application include a first hairpin coil 1 with a first straight line segment span y1, a second hairpin coil 2 with a second straight line segment span y2, and a third hairpin coil 3 with a third straight line segment span y3, wherein y1, y2, and y3 satisfy the following first rule:

[0078] y1=Q*m, y2=y1+1, y3=y2-Q;

[0079] Or, y1, y2 and y3 satisfy the following second rule:

[0080] y1=Q*m, y2=y1-1, y3=y2+Q.

[0081] The straight line spans of the three types of hairpin coils are related to the number of phases and the number of slots per pole per phase of the motor, and the straight line spans of the three types of hairpin coils are related to each other. That is to say, the straight line spans of the corresponding hairpin coils can be calculated to match the number of phases m and the number of slots per pole per phase Q of different motors, and the arrangement of the hairpin coils of the stator winding in the stator core can be determined accordingly, without completely redesigning the arrangement of the stator winding for motors with different numbers of phases and numbers of slots per pole per phase. This realizes a universal design method for stator windings, which can easily determine the arrangement of the hairpin coils in the stator winding regardless of how the number of phases and the number of slots per pole per phase of the motor change, greatly saving design costs and design time.

[0082] In one embodiment of the present application, the two straight segments of each hairpin coil are arranged in adjacent conductor layers. Preferably, the two straight segments of each hairpin coil are arranged in 2k layers and 2k-1 layers, respectively, where k is a natural number less than or equal to n. For example, in the case of 6 conductor layers, the two straight segments of a single hairpin coil are usually arranged in 1, 2 layers or 3, 4 layers or 5, 6 layers. This arrangement is conducive to reducing the difficulty of arranging the hairpin coil and facilitating the allocation of the straight segments of the hairpin coil in a single stator slot.

[0083] In one embodiment of the present application, the twist ends of multiple hairpin coils have the same span, and are all the first straight line span y1. The twist ends 4 of the hairpin coils all use the first straight line span y1, that is, all use the pitch Q*m as the span.

[0084] In the following implementation, the case where different numbers of parallel branches are used for each phase winding is specifically discussed. When the number of slots per pole per phase is Q, the motor generally uses 1, 2, Q, and 2Q as the number of parallel branches per phase. Although for motors with different numbers of parallel branches per phase, the stator winding includes the above three types of hairpin coils, the number and arrangement of the three types of hairpin coils can be adjusted to make the arrangement of the winding better ensure the phase balance between the branches and reduce harmonic consumption.

[0085] In one embodiment of the present application, when the number of parallel branches of each phase winding is 2, the windings of two adjacent layers of each branch of each phase include a first card-hairing coil 1, a second card-hairing coil 2 and a third card-hairing coil 3, wherein the number of first card-hairing coils 1 is Q*(P-1), the number of second card-hairing coils 2 is Q-1, and the number of third card-hairing coils 3 is 1.

[0086] The following takes a three-phase motor as an example to illustrate the stator winding arrangement when the number of parallel branches per phase winding is 2:

[0087] refer to Figure 1 and 2 , which respectively show the winding diagrams of the W-phase a and b branches of the stator assembly of an embodiment of the present application, wherein the number of branches per phase is 2. In this embodiment, the motor is a 6-pole 54-slot three-phase motor, n=3, that is, the conductor layer is 2n=6 layers, and the number of parallel branches per phase winding is 2. For example, the two branches of the W-phase are named a and b, and each layer of conductors arranged in the stator slots is marked in turn by numbers plus branch names. At this time, m=3, P=3, Q=3, and the span of the hairpin coil adopts the second rule, that is, y1=9, y2=8, y3=11. Figure 1 and 2 The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Figure 1 and 2 As can be seen, for every two conductor layers of each branch, there are a total of 3*3=9 hairpin coils, of which the first hairpin coil 1 is 6, the second hairpin inner ring 2 is 2, and the third hairpin coil 3 is 1. Each branch of the 6-layer winding has a total of 9*3=27 hairpin coils, of which the first hairpin coil 1 is 18, the second hairpin coil 2 is 6, and the third hairpin coil 3 is 3. The span of the twist end is 9, and every two layers of each branch have a total of 3*3=9 twist ends 4 for welding the conductors in the slot.

[0088] refer to Figure 3 , which shows that according to Figure 1The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W each have two branches, the two branches of the U-phase winding are named c and d, and the two branches of the V-phase winding are named e and f. Figure 3 It can be seen that the arrangement of the U and V phase windings is similar to that of the W phase winding. Each phase winding has 18 hairpin coils in each adjacent two layers, and each phase winding has 6 layers, with a total of 18*3=54 hairpin coils, of which the first hairpin coil 1 has 36, the second hairpin coil 2 has 12, and the third hairpin coil 3 has 6. The span of the twist end of the stator assembly is 9, and each phase winding has a total of 9*3*2=54 twist ends 4. Figure 4 and 5 , which respectively show the Figure 1 A partial view of the stator assembly of an embodiment at the hairpin coil crown end and the torsion head end 4.

[0089] In one embodiment of the present application, when the number of stator winding branches per phase is 1, the windings of two adjacent layers of each branch per phase include a first card-pin coil, a second card-pin coil and a third card-pin coil, wherein the number of first card-pin coils is 2Q*(P-1), the number of second card-pin coils is 2*(Q-1), and the number of third card-pin coils is 2, wherein P is the number of pole pairs.

[0090] For a stator winding with 2 parallel branches per phase, the two branches per phase are connected in series to obtain a stator winding arrangement with 1 branch per phase. Taking the above-mentioned embodiment of a 6-pole 54-slot three-phase motor as an example, when the number of branches per phase is 1, there are 18 hairpin coils in each adjacent two layers of each phase winding, including 12 first hairpin coils, 4 second hairpin inner coils, and 2 third hairpin coils. There are 18*3=54 hairpin coils in each phase 6-layer winding, including 36 first hairpin coils, 12 second hairpin coils, and 6 third hairpin coils. The span of the twist end is 9, and there are 9*3*2=54 twist ends in each phase winding.

[0091] refer to Figure 6 and 7, which respectively show the winding diagrams of the U-phase a and b branches of the stator assembly of another embodiment of the present application, wherein the number of branches per phase is 2. In this embodiment, the motor is an 8-pole 48-slot three-phase motor, n=3, that is, the conductor layer is 2n=6 layers, and the number of parallel branches of each phase winding is 2. Exemplarily, the two branches of the U-phase are named a and b respectively, and each layer of conductors arranged in the stator slot is marked in sequence by a number plus the branch name. At this time, m=3, P=4, Q=2, and the span rule obtained by the first rule or the second rule for the hairpin coil is the same, that is, y1=6, y2=7, y3=5 or y1=6, y2=5, y3=7. For the convenience of description, the span combination obtained by the first rule is used for description below, that is, the straight line span of the first hairpin coil 1 is 6, the straight line span of the second hairpin coil 2 is 7, and the straight line span of the third hairpin coil 3 is 5. Figure 6 and 7 The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Figure 6 and 7 As can be seen, for every two conductor layers of each branch, there are a total of 4*2=8 hairpins, of which the first hairpin coil 1 is 6, the second hairpin coil 2 is 1, and the third hairpin coil 3 is 1. Each branch of the 6-layer winding has a total of 8*3=24 hairpin coils, of which the first hairpin coil 1 is 18, the second hairpin coil 2 is 3, and the third hairpin coil 3 is 3. The span of the twist end is 6, and every two layers of each branch have a total of 4*2=8 twist ends 4 for welding the conductors in the slot.

[0092] refer to Figure 8 , which shows that according to Figure 6 The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W each have two branches, the two branches of the V-phase winding are named c and d, and the two branches of the W-phase winding are named e. f. Figure 8 It can be seen that the arrangement of the U and V phase windings is similar to that of the W phase winding. Each phase winding has 16 hairpin coils in each adjacent two layers, and each phase winding has 6 layers, with a total of 16*3=48 hairpin coils, of which the first hairpin coil 1 has 36, the second hairpin coil 2 has 6, and the third hairpin coil 3 has 6. The span of the twist end of the stator assembly is 6, and each phase winding has a total of 8*3*2=48 twist ends 4. Fig. 9 and 10 , which respectively show the Figure 6 A partial view of the stator assembly of an embodiment at the hairpin coil crown end and the torsion head end 4.

[0093] In one embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2, another arrangement can be adopted, that is, the windings of two adjacent layers of each branch of each phase include a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is Q, the number of the second hairpin coil is (Q-1)*(P-1), and the number of the third hairpin coil is P-1;

[0094] Where P is the number of pole pairs.

[0095] refer to Fig.11 and 12 , which shows the winding diagram of the U-phase a and b branches in another arrangement when the number of branches per phase is 2. In this embodiment, another arrangement is adopted to arrange the stator winding with the number of branches per phase being 2, and the three types of hairpin coils have different numbers and arrangements from the above embodiments.

[0096] exist Fig.11 and 12 In the embodiment of the invention, the motor is an 8-pole 48-slot three-phase motor, n=3, that is, the conductor layer is 2n=6 layers, the number of parallel branches of each phase winding is 2, and for example, the two branches of the U phase are named a and b respectively, and each layer of conductors arranged in the stator slot is marked in sequence by a number plus the branch name. At this time, m=3, P=4, Q=2, and the span of the hairpin coil adopts the first rule, that is, y1=6, y2=7, y3=5. Fig.11 and 12 The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Fig.11 and 12 As can be seen, for every two conductor layers of each branch, there are a total of 4*2=8 hairpins, of which there are 2 first hairpin coils 1, 3 second hairpin inner coils 2, and 3 third hairpin coils 3. Each branch of the 6-layer winding has a total of 8*3=24 hairpin coils, of which there are 6 first hairpin coils 1, 9 second hairpin coils 2, and 9 third hairpin coils 3. The span of the twist ends is 6, and there are a total of 4*2=8 twist ends 4 for every two layers of each branch, which are used to weld the conductors in the slots.

[0097] refer to Fig.13 , which shows that according to Fig.11 The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W each have two branches, the two branches of the V-phase winding are named c and d, and the two branches of the W-phase winding are named e and f. Fig.13It can be seen that the V and W phase windings are arranged in a similar manner to the U phase winding, with 16 hairpin coils in each adjacent two layers of each phase winding, and 16*3=48 hairpin coils in each phase 6-layer winding, of which 12 are the first hairpin coils 1, 18 are the second hairpin coils 2, and 18 are the third hairpin coils 3. The span of the twist ends of the stator assembly is 6, and each phase winding has 8*3*2=48 twist ends 4.

[0098] By connecting the two branches per phase in the above embodiment in series into one branch, another arrangement of the stator winding with the number of branches per phase being 1 is obtained. The windings of two adjacent layers of each branch per phase include a first card-hairpin coil, a second card-hairpin coil and a third card-hairpin coil, the number of the first card-hairpin coil is 2Q, the number of the second card-hairpin coil is 2*(Q-1)*(P-1), and the number of the third card-hairpin coil is 2*(P-1).

[0099] Taking the above 8-pole 48-slot three-phase motor as an example, when the number of branches per phase is 1, each phase winding has 16 hairpin coils in each adjacent two layers, including 4 first hairpin coils, 6 second hairpin coils, and 6 third hairpin coils. Each phase has 6 layers of windings with a total of 16*3=48 hairpin coils, including 12 first hairpin coils, 18 second hairpin coils, and 18 third hairpin coils. The span of the twist end is 6, and each phase winding has a total of 8*3*2=48 twist ends.

[0100] In one embodiment of the present application, when the number of parallel branches of each phase winding is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first hairpin coil 1 and a third hairpin coil 3, wherein the number of the first hairpin coil 1 is 2*(P-1), and the number of the third hairpin coil 3 is 2;

[0101] Or, when the number of parallel branches of each phase winding is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairing coil 1 and a second card-hairing coil 2, wherein the number of first card-hairing coils 1 is 2*(P-1), and the number of second card-hairing coils 2 is 2.

[0102] Further, when the number of parallel branches of each phase winding is Q and Q>2, the two adjacent layers of windings of each phase include a first card-hairing coil 1, a second card-hairing coil 2 and a third card-hairing coil 3, wherein the number of first card-hairing coils 1 is 2Q*(P-1), the number of second card-hairing coils 2 is 2*(Q-1), and the number of third card-hairing coils 3 is 2.

[0103] In this embodiment, by limiting the number of hairpin coils in two adjacent layers of each phase and each branch and the number of hairpin coils in two adjacent layers of each phase, it is equivalent to limiting the corresponding number of hairpin coils in each branch of each phase. In this way, it is ensured that the straight line segments of the hairpin coils of each branch can be distributed in the stator slots of each pole and each phase, further ensuring the phase balance between each branch.

[0104] The following takes a specific three-phase motor as an example to illustrate the stator winding arrangement when the number of parallel branches of each phase winding is Q:

[0105] refer to Fig.14 , 15 and 16, which respectively show the winding diagrams of the U-phase a, b, and c branches of the stator assembly of an embodiment of the present application, wherein the number of branches per phase is Q. In this embodiment, the motor is a 6-pole 54-slot three-phase motor, n=4, that is, the conductor layer is 2n=8 layers, at this time m=3, P=3, Q=3, and the number of parallel branches per phase winding is Q=3. Exemplarily, the three branches of the U phase are named a, b, and c, respectively, and each layer of conductors arranged in the stator slots is marked in turn by numbers plus branch names. The span of the hairpin coil adopts the first rule, that is, y1=9, y2=10, y3=7. Fig.14 , 15 The crown end connecting the two straight line segments of the hairpin coil in 16 is represented by a black solid line, and the twist end connecting the straight line segments is represented by a black dotted line. Fig.14 , 15 As can be seen from Figures 1 and 16, for every two conductor layers of each branch, there are 3*2=6 hairpins in total, among which, when the adjacent two layers of each branch of each phase only include the first hairpin coil 1 and the third hairpin coil 3, there are 4 first hairpin coils 1 and 2 third hairpin coils 3. When the adjacent two layers of each branch of each phase only include the first hairpin coil 1 and the second hairpin coil 2, there are 4 first hairpin coils 1 and 2 second hairpin coils 2. Each branch of the 8-layer winding has a total of 6*4=24 hairpin coils, and the span of the twist end 4 is 9. There are 2*3=6 twist ends 4 in each branch for welding the conductors in the slot. There are 3 types of hairpin coils in each adjacent two layers of each phase winding formed by each branch, and their spans are 9, 10, and 7 respectively. Among them, there are 12 first hairpin coils 1, 4 second hairpin coils 2, and 2 third hairpin coils 3. The span of the twist end is 9, and there are 18 twist ends in total. refer to Fig.17 , which shows that according to Fig.14 The U-phase winding diagram of the stator assembly of the embodiment. Each phase has 8 layers of windings, with a total of 72 hairpin coils, of which the first hairpin coils 1 have a total of 48, the second hairpin coils 2 have a total of 16, and the third hairpin coils 3 have a total of 8. The span of the twist ends is 9, and there are a total of 72 twist ends 4.

[0106] refer to Fig.18 , which shows that according to Fig.14 The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W have three branches respectively, the three branches of the V-phase winding are named d, e, and f respectively, and the three branches of the W-phase winding are named g, h, and j respectively; the arrangement of the hairpin coils of the V, W phases and the U phase winding is similar, and the types and quantities are the same.

[0107] refer to Figure 19-22 , which respectively show the winding diagrams of the U-phase a, b, c, and d branches of the stator assembly of another embodiment of the present application, wherein the number of branches per phase is Q. In this embodiment, the motor is a 6-pole 72-slot three-phase motor, n=4, that is, the conductor layer is 2n=8 layers, at this time m=3, P=3, Q=4, and the number of parallel branches per phase winding is Q=4. Exemplarily, the four branches of the U-phase are named a, b, c, and d, and each layer of conductors arranged in the stator slots are marked in turn by numbers plus branch names. The span of the hairpin coil adopts the second rule, that is, y1=12, y2=11, y3=15. Figure 19-22 The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Figure 19-22 It can be seen that for every two conductor layers of each branch, there are 3*2=6 hairpins in total, among which, when the two adjacent layers of each branch of each phase only include the first hairpin coil 1 and the third hairpin coil 3, the number of the first hairpin coil 1 is 4, and the number of the third hairpin coil 3 is 2. When the two adjacent layers of each branch of each phase only include the first hairpin coil 1 and the second hairpin coil 2, the number of the first hairpin coil 1 is 4, and the number of the second hairpin coil 2 is 2. Each branch of the 8-layer winding has a total of 6*4=24 hairpin coils, and the span of the twist end 4 is 12. There are 2*3=6 twist ends 4 in every two layers of each branch to weld the conductors in the slot. Each branch forms a winding of each phase, and each adjacent layer has three types of hairpin coils, with spans of 12, 11, and 15, respectively. The first hairpin coil 1 has 16, the second hairpin coil 2 has 6, and the third hairpin coil 3 has 2. The span of the twist end is 12, and there are 24 twist ends 4 in total. Fig.23 , which shows that according to Fig.19 The U-phase winding diagram of the stator assembly of the embodiment. Each phase has 8 layers of windings, with a total of 96 hairpin coils, of which the first hairpin coils 1 have a total of 64, the second hairpin coils 2 have a total of 24, and the third hairpin coils 3 have a total of 8. The span of the twist ends is 12, and there are a total of 96 twist ends 4.

[0108] refer to Fig.24 , which shows that according to Fig.19The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W have four branches respectively, the four branches of the V-phase winding are named e, f, g, and h respectively, and the four branches of the W-phase winding are named i, j, k, o, V, and W-phase windings are arranged in a similar manner to the U-phase windings, and the types and quantities are the same.

[0109] In one embodiment of the present application, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a second hairpin coil, wherein the number of the first hairpin coil is 2, and the number of the second hairpin coil is 2*(P-1);

[0110] Or, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil, a second card-hairpin coil and a third card-hairpin coil, wherein the number of the first card-hairpin coil is 2, the number of the second card-hairpin coil is P-1, and the number of the third card-hairpin coil is P-1;

[0111] Where P is the number of pole pairs.

[0112] Further, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the two adjacent layers of windings of each phase include a first card-carrying coil, a second card-carrying coil and a third card-carrying coil, wherein the number of first card-carrying coils is 2Q, the number of second card-carrying coils is 2*(Q-1)*(P-1), and the number of third card-carrying coils is 2*(P-1).

[0113] In this embodiment, another arrangement is adopted to arrange the stator winding with the number of branches per phase being Q. At this time, the windings of two adjacent layers of each branch of each phase have different types and quantities of hairpin coils compared with the above embodiment with the number of branches per phase being Q, and each two layers of each phase also have three different numbers of hairpin coils.

[0114] refer to Fig.25 , which shows a winding diagram of a U-phase winding in another arrangement when the number of branches per phase is Q. In this embodiment, another arrangement is adopted to arrange the stator winding with the number of branches per phase being Q, and the three types of hairpin coils have different numbers and arrangements from those in the above embodiment.

[0115] exist Fig.25 In the embodiment, the motor is a 6-pole 54-slot three-phase motor, n=4, that is, the conductor layer is 2n=8 layers, at this time m=3, P=3, Q=3, the number of parallel branches of each phase winding is Q=3, and for example, the three branches of the U phase are named a, b and c respectively, and each layer of conductors arranged in the stator slot is marked in turn by a number plus the branch name. The span of the hairpin coil adopts the second rule, that is, y1=9, y2=8, y3=11. Fig.25The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Fig.25 It can be seen that for every two conductor layers of each branch, there are 3*2=6 hairpins in total, among which, when the two adjacent layers of each branch of each phase only include the first hairpin coil 1 and the second hairpin coil 2, there are 2 first hairpin coils 1 and 4 second hairpin coils 3. When the two adjacent layers of each branch of each phase include the first hairpin coil 1, the second hairpin coil 2 and the third hairpin coil 3, there are 2 first hairpin coils 1, 2 second hairpin coils 2 and 2 third hairpin coils 3. There are 6*4=24 hairpin coils in total for each branch of the 8-layer winding, and the span of the twist end 4 is 9. There are 2*3=6 twist ends 4 in total for every two layers of each branch to weld the conductors in the slot. Each phase winding formed by each branch has three types of hairpin coils in each adjacent layer, and their spans are 9, 8, and 11 respectively, of which the first hairpin coil 1 has 6, the second hairpin coil 2 has 8, and the third hairpin coil 3 has 4, and the span of the twist end is 9, with a total of 18 twist ends. Each phase has 8 layers of winding, and there are 72 hairpin coils in total, of which the first hairpin coil 1 has 24, the second hairpin coil 2 has 32, and the third hairpin coil 3 has 16, and the span of the twist end is 9, with a total of 72 twist ends 4.

[0116] refer to Fig.26 , which shows that according to Fig.25 The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W have three branches respectively, the three branches of the V-phase winding are named d, e, and f respectively, and the three branches of the W-phase winding are named g, h, and i respectively; the arrangement of the hairpin coils of the V, W phases and the U phase winding is similar, and the types and quantities are the same.

[0117] In one embodiment of the present application, when the number of parallel branches of each phase winding is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil 1 and a third hairpin coil 3, wherein the number of the first hairpin coil 1 is P-1, and the number of the third hairpin coil 3 is 1;

[0118] Or, when the number of parallel branches of each phase winding is 2Q, the windings of two adjacent layers of each branch of each phase include a first card-hairing coil 1 and a second card-hairing coil 2, wherein the number of the first card-hairing coil 1 is P-1, and the number of the second card-hairing coil 2 is 1.

[0119] Further, when the number of parallel branches of each phase winding is 2Q, the windings of two adjacent layers of each phase include a first card-hairing coil 1, a second card-hairing coil 2 and a third card-hairing coil 3, wherein the number of first card-hairing coils 1 is 2Q*(P-1), the number of second card-hairing coils 2 is 2*(Q-1), and the number of third card-hairing coils 3 is 2.

[0120] In this embodiment, by limiting the number of each hairpin coil in two adjacent layers of each branch of each phase and the number of each hairpin coil in two adjacent layers of each phase, it is equivalent to limiting the corresponding number of hairpin coils in each branch of each phase. In this way, it is ensured that the straight line segments of the hairpin coils of each branch can be distributed in the stator slots of each pole and each phase, and the phase balance between each branch is further ensured.

[0121] The following takes a specific three-phase motor as an example to illustrate the stator winding arrangement when the number of parallel branches per phase winding is 2Q:

[0122] refer to Figure 27-32 , which respectively show the winding diagrams of the U-phase a, b, c, d, e, and f branches of the stator assembly of another embodiment of the present application, wherein the number of branches per phase is 2Q. In this embodiment, the motor is a 6-pole 54-slot three-phase motor, n=5, that is, the conductor layer is 2n=10 layers, at this time m=3, P=3, Q=3, and the number of parallel branches per phase winding is 2Q=6. Exemplarily, the six branches of the U-phase are named a, b, c, d, e, and f, and each layer of conductors arranged in the stator slots are marked in sequence by numbers plus branch names. The span of the hairpin coil adopts the second rule, that is, y1=9, y2=8, y3=11. Figure 27-32 The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Figure 27-32 It can be seen that for every two conductor layers of each branch, there are a total of 3 hairpins, among which, when the two adjacent layers of each branch of each phase only include the first hairpin coil 1 and the third hairpin coil 3, there are 2 first hairpin coils 1 and 1 third hairpin coil 3. When the two adjacent layers of each branch of each phase only include the first hairpin coil 1 and the second hairpin coil 2, the number of first hairpin coils 1 is 2, the number of second hairpin coils 2 is 1, and each branch of the 10-layer winding has a total of 3*5=15 hairpin coils, and the span of the twist ends 4 is 9. There are 3 twist ends 4 in every two layers of each branch to weld the conductors in the slots. There are 3 types of hairpin coils in every two adjacent layers of each phase winding formed by each branch, and their spans are 9, 8, and 11 respectively. Among them, there are 12 first hairpin coils 1, 4 second hairpin coils 2, and 2 third hairpin coils 3. The span of the twist ends is 9, and there are 18 twist ends 4 in total. Reference Fig.33 , which shows that according to Fig. 27 The U-phase winding diagram of the stator assembly of the embodiment. Each phase has 10 layers of windings, with a total of 90 hairpin coils, of which the first hairpin coils 1 are 60 in total, the second hairpin coils 2 are 20 in total, and the third hairpin coils 3 are 10 in total. The span of the twist ends is 9, and there are a total of 90 twist ends 4.

[0123] refer to Fig.34 , which shows that according to Fig. 27The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W have 6 branches respectively, the 6 branches of the V-phase winding are named g, h, i, j, k, and l respectively, and the 6 branches of the W-phase winding are named o, p, q, r, s, and t respectively. The arrangement of the hairpin coils of the V and W phases is similar to that of the U phase winding, and the types and quantities are the same.

[0124] In one embodiment of the present application, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a second hairpin coil, wherein the number of the first hairpin coil is 1, and the number of the second hairpin coil is (P-1);

[0125] Or, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each branch of each phase include a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is 1, the number of the second hairpin coil is P-2, and the number of the third hairpin coil is 1;

[0126] Where P is the number of pole pairs.

[0127] Further, when the number of parallel branches of the stator winding of each phase is 2Q, the windings of two adjacent layers of each phase include a first card-hairing coil, a second card-hairing coil and a third card-hairing coil, wherein the number of first card-hairing coils is 2Q, the number of second card-hairing coils is 2*(Q-1)*(P-1), and the number of third card-hairing coils is 2*(P-1).

[0128] In the above embodiment, another arrangement is adopted to arrange the stator winding with 2Q branches per phase. At this time, the windings of two adjacent layers of each branch per phase have different types and quantities of hairpin coils compared with the above embodiment with 2Q branches per phase, and each two layers per phase also have three different numbers of hairpin coils.

[0129] refer to Fig.35 , which shows a winding diagram of a U-phase winding using another arrangement when the number of branches per phase is 2Q. In this embodiment, another arrangement is adopted to arrange the stator winding with the number of branches per phase being 2Q, and the three types of hairpin coils have different numbers and arrangements from the above embodiment.

[0130] exist Fig.35 In the embodiment, the motor is a 6-pole 54-slot three-phase motor, n=5, that is, the conductor layer is 2n=10 layers, at this time m=3, P=3, Q=3, the number of parallel branches of each phase winding is 2Q=6, and by way of example, the six branches of the U phase are named a, b, c, d, e and f, and each layer of conductors arranged in the stator slot is marked in turn by a number plus the branch name. The span of the hairpin coil adopts the second rule, that is, y1=9, y2=8, y3=11. Fig.35 The crown end of the hairpin coil connecting the two straight segments is represented by a black solid line, and the twist end connecting the straight segments is represented by a black dotted line. Fig.35 It can be seen that for every two conductor layers of each branch, there are a total of 3 hairpins, among which, when the adjacent two layers of each branch of each phase only include the first hairpin coil 1 and the second hairpin coil 2, the number of the first hairpin coil 1 is 1, and the number of the second hairpin coil 2 is 2. When the adjacent two layers of each branch of each phase include the first hairpin coil 1, the second hairpin coil 2 and the third hairpin coil 3, the number of the first hairpin coil 1 is 1, the number of the second hairpin coil 2 is 1, and the number of the third hairpin coil 3 is 1. There are 3*5=15 hairpin coils in total for each branch of the 10-layer winding, and the span of the twist end 4 is 9. There are 3 twist ends 4 in total for every two layers of each branch to weld the conductors in the slot. Each phase winding formed by each branch has three types of hairpin coils in each adjacent two layers, and their spans are 9, 8, and 11 respectively, of which the first hairpin coil 1 has 6, the second hairpin coil 2 has 8, and the third hairpin coil 3 has 4, and the span of the twist end is 9, with a total of 18 twist ends 4. Each phase has 10 layers of windings, with a total of 90 hairpin coils, of which the first hairpin coil 1 has 30, the second hairpin coil 2 has 40, and the third hairpin coil 3 has 20, and the span of the twist end is 9, with a total of 90 twist ends 4.

[0131] refer to Fig.36 , which shows that according to Fig.35 The winding diagram of the three-phase winding of the stator assembly of the embodiment. The three-phase windings U, V, and W have 6 branches respectively, the 6 branches of the V-phase winding are named g, h, i, j, k, and l respectively, and the 6 branches of the W-phase winding are named q, s, t, x, y, and z respectively. The arrangement of the hairpin coils of the V and W phases is similar to that of the U phase winding, and the types and quantities are the same.

[0132] It should be understood that the above-mentioned embodiments only illustrate winding design methods for three-phase motors with several pole slot combinations and different numbers of branches per phase. For motors with other pole slot combinations, numbers of phases or numbers of branches per phase, those skilled in the art can also design the stator assembly accordingly according to the design scheme of the stator assembly of the present application, especially the stator winding in the stator assembly, which should also be included in the scope of protection of the present application.

[0133] In one embodiment of the present application, each phase winding in the three-phase motor can be connected in a star connection or in a delta connection. Fig.37 and 38 , which respectively show the star and triangle connection modes of the three-phase winding with 2 branches per phase. Those skilled in the art can infer the corresponding connection modes of the three-phase winding with other numbers of branches according to the connection mode of the three-phase winding with 2 branches per phase, which should also be included in the scope of the present application.

[0134] A second aspect of the present application further provides an electric motor, comprising the stator assembly described above.

[0135] The motor has all the beneficial technical effects of the aforementioned stator assembly, which will not be described in detail here.

[0136] A third aspect of the present application further provides a vehicle, comprising the motor described above.

[0137] The vehicle has all the beneficial technical effects of the aforementioned stator assembly, which will not be repeated here.

[0138] It should be understood that the stator assembly of the present application can be installed on various vehicles, including cars, trucks, buses, hybrid vehicles, pure electric vehicles, etc. Therefore, the subject matter of the present application is also intended to protect various vehicles equipped with the stator assembly of the present application.

[0139] It should be understood that all the above preferred embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present application should be within the legal protection scope of the present application.

[0140] The relevant user personal information that may be involved in the various embodiments of this application is strictly in accordance with the requirements of laws and regulations, following the principles of legality, legitimacy and necessity, based on the reasonable purposes of business scenarios, to process the personal information that users actively provide during the use of products / services or generated due to the use of products / services, as well as the personal information obtained with the user's authorization.

[0141] The user personal information processed by the applicant will vary depending on the specific product / service scenario, and shall be based on the specific scenario in which the user uses the product / service, which may involve the user's account information, device information, driving information, vehicle information or other related information. The applicant will treat the user's personal information and its processing with a high degree of diligence.

[0142] The Applicant attaches great importance to the security of user personal information and has adopted reasonable and feasible security protection measures that comply with industry standards to protect user information and prevent personal information from being accessed, disclosed, used, modified, damaged or lost without authorization.

Claims

1. A stator assembly, characterized in that: include: A stator core, wherein the radial inner surface of the stator core is provided with stator slots evenly distributed in the circumferential direction; A stator winding, wherein the stator winding is a multi-phase winding, which is formed by winding a conductor and at least a part of which is arranged in the stator slot, and 2n layers of conductors are arranged in each stator slot, where n is a natural number; Each phase of the stator winding includes a plurality of hairpin coils, each of which has a crown end, a twist end, and two straight line segments connecting the crown end and the twist end; The plurality of card-issuing coils include a first card-issuing coil having a first straight line segment span y1, a second card-issuing coil having a second straight line segment span y2, and a third card-issuing coil having a third straight line segment span y3, wherein y1, y2, and y3 satisfy the following first rule: y1=Q*m, y2=y1+1, y3=y2-Q; Or, y1, y2 and y3 satisfy the following second rule: y1=Q*m, y2=y1-1, y3=y2+Q; Among them, m is the number of phases, and Q is the number of slots per pole and per phase.

2. The stator assembly according to claim 1, characterized in that The two straight line segments of each hairpin coil are respectively arranged in adjacent conductor layers, and the spans of the twist ends of the multiple hairpin coils are equal and are all the first straight line segment spans.

3. The stator assembly according to claim 1, characterized in that: When the number of stator winding branches per phase is 1, the windings of two adjacent layers of each branch per phase include a first hairpin coil, a second hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is 2Q*(P-1), the number of the second hairpin coil is 2*(Q-1), and the number of the third hairpin coil is 2; Or, the number of the first card issuing coils is 2Q, the number of the second card issuing coils is 2*(Q-1)*(P-1), and the number of the third card issuing coils is 2*(P-1); Where P is the number of pole pairs.

4. The stator assembly according to claim 1, characterized in that: When the number of parallel branches of the stator winding of each phase is 2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil, a second card-hairpin coil and a third card-hairpin coil, wherein the number of the first card-hairpin coil is Q*(P-1), the number of the second card-hairpin coil is Q-1, and the number of the third card-hairpin coil is 1; Or, the number of the first card issuing coils is Q, the number of the second card issuing coils is (Q-1)*(P-1), and the number of the third card issuing coils is P-1; Where P is the number of pole pairs.

5. The stator assembly according to claim 1, characterized in that When the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first hairpin coil and a third hairpin coil, wherein the number of the first hairpin coil is 2*(P-1), and the number of the third hairpin coil is 2; Or, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil and a second card-hairpin coil, wherein the number of the first card-hairpin coils is 2*(P-1), and the number of the second card-hairpin coils is 2; Where P is the number of pole pairs.

6. The stator assembly according to claim 5, characterized in that When the number of parallel branches of the stator winding of each phase is Q and Q>2, the two adjacent layers of windings of each phase include a first card-hairing coil, a second card-hairing coil and a third card-hairing coil, wherein the number of first card-hairing coils is 2Q*(P-1), the number of second card-hairing coils is 2*(Q-1), and the number of third card-hairing coils is 2.

7. The stator assembly according to claim 1, characterized in that When the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil and a second card-hairpin coil, wherein the number of the first card-hairpin coil is 2 and the number of the second card-hairpin coil is 2*(P-1); Or, when the number of parallel branches of the stator winding of each phase is Q and Q>2, the windings of two adjacent layers of each branch of each phase include a first card-hairpin coil, a second card-hairpin coil and a third card-hairpin coil, wherein the number of the first card-hairpin coil is 2, the number of the second card-hairpin coil is P-1, and the number of the third card-hairpin coil is P-1; Where P is the number of pole pairs.

8. The stator assembly according to claim 7, characterized in that When the number of parallel branches of the stator winding of each phase is Q and Q>2, the two adjacent layers of windings of each phase include a first card-hairing coil, a second card-hairing coil and a third card-hairing coil, wherein the number of first card-hairing coils is 2Q, the number of second card-hairing coils is 2*(Q-1)*(P-1), and the number of third card-hairing coils is 2*(P-1).

9. A motor, characterized in that: The electric machine comprises a stator assembly according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle comprises an electric machine according to claim 9.

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