Motor stator and motor using same

Abstract

The present invention proposes a motor stator and a motor using the same. The motor stator includes a stator core and a stator winding. The stator core has a stator groove including a plurality of groove layers. The groove layers are arranged along the radial direction of the stator core. The stator winding is inserted into the stator groove and includes a plurality of first conductors and a plurality of second conductors. The first conductor and the second conductor include two straight line segment portions. Here, the straight line segment portions of the plurality of first conductors are respectively located in two adjacent groove layers. Both the first conductor and the second conductor include two straight line segment portions. One straight line segment portion of the second conductor and one straight line segment portion of the first conductor are located in the same stator groove. The pole pitch of the stator winding is τ, the size of the node pitch of the second conductor is y2, the interval between the straight line segment portions of two adjacent first conductors in the same groove layer is L1, and the interval between the straight line segment portions of adjacent second conductors is L2.

Description

[Technical Field]

[0001] The present invention relates to the field of motor technology, and more particularly to a motor stator and a motor using the same. [Background technology]

[0002] The stator core winding uses rectangular wire, which significantly increases the filling rate of the bare copper slots in the stator winding, thereby significantly improving the efficiency of the motor. The stator winding includes multiple hairpin coils, which are drilled into the stator slots of the stator core according to a specific layout to form the desired winding for a single-phase or multi-phase motor.

[0003] However, conventional stator hairpin coils have too many types, complicated arrangements, and a high voltage difference between different groove layers in the same stator groove. Therefore, when used under high voltage, the hairpin coils between different groove layers are prone to breakdown, which can lead to short circuits and cause the motor to fail. Summary of the Invention

[0004] In order to solve the problem that the hairpin coil is easily broken down when used under high voltage due to the high voltage difference between the layers of different groove layers, the present invention proposes a motor stator and a motor using the same, and proposes the following technical solutions.

[0005] The present invention provides a motor stator, which includes a stator core and a stator winding.

[0006] The stator core has a stator groove, and the stator groove includes a plurality of groove layers, which are arranged along the radial direction of the stator core.

[0007] The stator winding is inserted into the stator groove and includes a plurality of first conductors and a plurality of second conductors, each of the first conductors and the second conductors including two straight segment portions.

[0008] Here, the plurality of straight line segments of the first conductor are located in two adjacent groove layers, each of the first conductor and the second conductor includes two straight line segments, and one straight line segment of the second conductor and one straight line segment of the first conductor are located in the same stator groove.

[0009] When the pole pitch of the stator winding is τ, the node pitch of the second conductor is y2, the distance between two adjacent first conductors in the same groove layer is L1, and the distance between adjacent second conductors is L2, L1=τ+1 or L1=τ-1, L2=2τ-y2 are satisfied.

[0010] In one embodiment of the present invention, the stator winding further includes the third conductor.

[0011] The third conductor is positioned between the first conductor and the second conductor. The two straight line segment portions of the third conductor and the two straight line segment portions of the first conductor are positioned in the same stator groove. When the node pitch of the third conductor is y3, y3 = y1 is satisfied.

[0012] In one embodiment of the present invention, the number of groove layers occupied by the third conductor in the stator groove is at least two.

[0013] In one embodiment of the present invention, the stator winding includes at least one phase winding.

[0014] In one embodiment of the present invention, each phase winding includes at least two branch windings, which are connected in series or in parallel.

[0015] In one embodiment of the present invention, each of the phase windings includes two branch windings, and the straight segment portions of the second conductor of the two branch windings are located in adjacent stator slots.

[0016] In one embodiment of the present invention, the straight segment portions of the first conductors of the two branch windings are located in adjacent stator slots.

[0017] In one embodiment of the present invention, the first conductor further includes a head and a bent portion.

[0018] The head portion is connected between one ends of two straight segment portions of the first conductor.

[0019] The bent portions are connected to the other ends of the two straight segment portions of the first conductor, respectively.

[0020] In one embodiment of the present invention, the extending directions of the bent portions of the first conductors located between adjacent second conductors are opposite to each other, and the extending directions of the bent portions of the first conductors located outside the second conductors are the same.

[0021] The present invention further proposes a motor, which includes a motor body and a motor stator attached to the motor body.

[0022] The motor stator includes a stator core and a stator winding.

[0023] The stator core has a stator groove including a plurality of groove layers, the groove layers being arranged along the radial direction of the stator core.

[0024] The stator winding is inserted into the stator groove and includes a plurality of first conductors and a plurality of second conductors, each of which includes two straight segment portions.

[0025] Here, the plurality of straight line segments of the first conductor are located in two adjacent groove layers, each of the first conductor and the second conductor includes two straight line segments, and one straight line segment of the second conductor and one straight line segment of the first conductor are located in the same stator groove.

[0026] When the pole pitch of the stator winding is τ, the node pitch of the second conductor is y2, the distance between two adjacent first conductors in the same groove layer is L1, and the distance between adjacent second conductors is L2, L1=τ+1 or L1=τ-1, L2=2τ-y2 are satisfied.

[0027] This invention proposes a motor stator and a motor using the same, which solves the problem of hair coil breakdown due to a high voltage difference between layers with different numbers of grooves within a single stator groove. By arranging both the inlet and outlet ends of each branch winding on the same side of the stator winding, the height of the welding ends can be fully utilized. This also solves the problem of allocating the number of series conductors for each phase, making it possible to design a motor that meets specific power and torque requirements. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a structural schematic diagram of a motor stator according to the present invention; [Figure 2] 1 is a structural schematic diagram of a hairpin terminal of a motor stator according to the present invention; [Figure 3] 1 is a schematic diagram showing the structure of a welding terminal of a motor stator according to the present invention; [Figure 4] 3 is a structural schematic diagram of a first coil group made of a first conductor in a motor stator according to the present invention. FIG. [Figure 5] 4 is a structural schematic diagram of a third coil group made of a third conductor in the motor stator according to the present invention. FIG. [Figure 6] 4 is a structural schematic diagram of a second coil group made of a second conductor in the motor stator according to the present invention. FIG. [Figure 7] 3 is a structural schematic diagram of a first type conductor in a first conductor of a motor stator according to the present invention; FIG. [Figure 8] 4 is a structural schematic diagram of a second type conductor in the first conductor of the motor stator according to the present invention; FIG. [Figure 9] 4 is a structural schematic diagram of a third conductor of a motor stator according to the present invention. FIG. [Figure 10]4 is a structural schematic diagram of a second conductor of a motor stator according to the present invention. FIG. [Figure 11] FIG. 2 is a wiring diagram of the stator windings of the motor stator according to the present invention. [Figure 12] FIG. 2 is a winding schematic diagram of a stator winding of a motor stator according to the present invention. [Figure 13] 2 is a schematic diagram of a stator groove of a motor stator according to the present invention; FIG. [Figure 14] 1 is a diagram illustrating the configuration of a motor according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, embodiments of the present invention will be described using specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be further implemented or applied by different specific embodiments. Each detail of this specification can also be variously modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] The drawings provided in this embodiment only provide a rough outline of the basic concept of the present invention. Therefore, the drawings show only components related to the present invention, and are not based on the number, shape, and dimensions of components in actual implementation. In actual implementation, the shape, number, and proportion of each component may be changed arbitrarily, and the layout of the elements may be more complex.

[0031] The present invention proposes a motor stator and a motor using the same, which can be applied to fields such as electric servo transmission and transportation. For example, the motor stator and a motor using the same according to the present invention can be applied to electric vehicles. The present invention can improve motor efficiency by solving the problem of short circuits caused by the phenomenon in which hairpin coils between different groove layers are easily broken down. The present invention will now be described in detail with reference to specific embodiments.

[0032] As shown in FIGS. 1 to 3 , the present invention proposes a motor stator. In some embodiments, the motor stator 100 may include a stator core 300 and a stator winding 500. The stator core 300 may have a plurality of stator grooves formed on the inner surface of the stator core 300. The stator grooves may be arranged along the circumferential direction of the stator core 300. The stator grooves may be spaced apart on the stator core 300 at a predetermined groove pitch. As shown in FIGS. 11 and 12 , the plurality of stator grooves may be arranged in the circumferential direction of the stator core 300, such as a first stator groove, a second stator groove, a third stator groove, a fourth stator groove, and so on, for example, 48 stator grooves in the circumferential direction of the stator core 300. As shown in FIG. 13 , each stator groove may have a plurality of groove layers. In some embodiments, each stator groove may have an odd number of groove layers. For example, five groove layers are arranged in each stator groove. For example, the five groove layers may be arranged in the following order along the radial direction from the inside to the outside of the stator core 300: first groove layer, second groove layer, third groove layer, fourth groove layer, and fifth groove layer. In other words, the first groove layer is located closer to the inside of the stator groove, and the fifth groove layer is located closer to the outside of the stator groove. The specific reference numerals of the groove layers for each stator groove are not limited, and they may be arranged in the order of 1 to 5 from the inside to the outside, or from the outside to the inside.

[0033] See FIGS. 4, 7-8, 6, and 10. In some embodiments, the stator winding 500 can be inserted into a stator groove. The stator winding 500 can include a plurality of first conductors 510 and a plurality of second conductors 520. The plurality of first conductors 510 can form a first coil group. The first coil group can be located in the stator groove of the stator core 300. The plurality of second conductors 520 can form a second coil group. The second coil group can be located in the stator groove of the stator core 300. The second coil group can be located closer to the interior of the stator groove.

[0034] See FIGS. 4, 7, and 8. In some embodiments, the first conductor 510 may include a head 501, a straight segment 502, and a bent portion 503. Here, the straight segment 502 may be used to insert into a stator groove. The two straight segment 502 of the first conductor 510 may be inserted into different stator grooves. The head 501 may be connected between one ends of the two straight segment 502. The bent portion 503 may be connected to the other ends of the two straight segment 502.

[0035] See FIGS. 6 and 10. In some embodiments, the structure of the second conductor 520 may be similar to that of the first conductor 510. The second conductor 520 may include a head portion 501, a straight segment portion 502, and a bent portion 503. The straight segment portion 502 may be used to insert into a stator groove. The two straight segment portions 502 of the second conductor 520 may be used to insert into different stator grooves. The head portion 501 may be connected between one ends of the two straight segment portions 502. The bent portion 503 may be connected to the other ends of the two straight segment portions 502.

[0036] Hereinafter, the first conductor 510 and the second conductor 520 will be described in detail with reference to specific embodiments.

[0037] See FIGS. 4, 7, and 8. In some embodiments, the first conductor 510 may include a first type conductor 511 and a second type conductor 512. Here, the first type conductor 511 may include a head portion 501, a straight segment portion 502, and a bent portion 503. The straight segment portion 502 may be used to be inserted into a stator groove. The two straight segment portions 502 of the first type conductor 511 may be used to be inserted into different stator grooves. The head portion 501 may be connected between one ends of the two straight segment portions 502. The bent portion 503 may be connected to the other ends of the two straight segment portions 502.

[0038] Here, the second-type conductor 512 may include a head 501, a straight segment 502, and a bent portion 503. The straight segment 502 can be used to insert into a stator groove. The two straight segment portions 502 of the second-type conductor 512 can be used to insert into different stator grooves. The head 501 can be connected between one end of the two straight segment portions 502. The bent portion 503 can be connected to the other end of the two straight segment portions 502. The difference between the first-type conductor 511 and the second-type conductor 512 is that the two bent portions 503 of the first-type conductor 511 extend in the same direction, while the two bent portions of the second-type conductor 512 extend in opposite directions, facing each other.

[0039] 6 and 10 . In some embodiments, the second conductor 520 includes two portions. One portion of the second conductor 520 has a node pitch that is larger than the pole pitch of the stator winding 500, and the other portion of the second conductor 520 has a node pitch that is smaller than the pole pitch of the stator winding 500. The sum of the node pitches of the two portions of the second conductor 520 may be twice the pole pitch of the stator winding 500. For example, if the pole pitch of the stator winding 500 is six groove pitches, the node pitch of one portion of the second conductor 520 may be five groove pitches, and the node pitch of the other portion of the second conductor 520 may be seven groove pitches.

[0040] 11 and 12 . In some embodiments, the straight segment portions 502 of the multiple first conductors 510 may be located in two adjacent groove layers. The straight segment portions 502 of the second conductors 520 and the straight segment portions 502 of the first conductors 510 may be located in the same stator groove. The node pitch of the first conductors 510 may be the same as the pole pitch of the stator winding 500. In some embodiments, the spacing between the straight segment portions 502 of adjacent first conductors 510 in the same groove layer may differ by one groove pitch from the pole pitch of the stator winding 500. The spacing between the straight segment portions 502 of two adjacent second conductors 520 may be the same. For example, if the pole pitch of the stator winding is τ, the node pitch of the second conductor is y2, the distance between two adjacent first straight segment portions of the same groove layer is L1, and the distance between adjacent straight segment portions 502 of the second conductor is L2, then L1=τ+1 or L1=τ-1, L2=2τ-y2 are satisfied.

[0041] See FIGS. 1-3, 11, and 12. In some embodiments, the number of stator slots in the stator core 300 may be, for example, 48. The stator winding 500 may include multiple phase windings. The multiple phase windings differ from each other in electrical phase. For example, the stator winding 500 may include three phase windings. Each phase winding includes two branch windings. The two branch windings may be connected in series or in parallel. Each branch winding may include eight magnetic poles. The pole pitch of the stator winding is six slot pitches. The number of slots per phase per pole is 2, and q=z / 2pm. Here, q is the number of phase slots per pole, z is the number of stator slots, 2p is the number of poles of the motor, and m is the number of phases of the motor.

[0042] 1 to 3, 11, and 12, the node pitch of the first conductor 510 may be the same as the pole pitch of the stator winding 500, or may be six groove pitches. The spacing between the straight segment portions 502 of adjacent first conductors 510 in the same groove layer may be five groove pitches or seven groove pitches. In some embodiments, the node pitch of the second conductor 520 may be seven groove pitches. The spacing between the straight segment portions 502 of two adjacent second conductors 520 may be five groove pitches. The second conductors 520 having a node pitch of seven groove pitches may be arranged along the circumferential direction of the stator core 300. In another embodiment, the node pitch of the second conductor 520 may be five groove pitches. The spacing between the straight segments 502 of two adjacent second conductors 520 may be seven groove pitches. The second conductors 520 having a node pitch of five groove pitches may be arranged along the circumferential direction of the stator core 300.

[0043] In this case, the first conductor 510 and the second conductor 520 are not filled in the same stator slot, but are filled in adjacent stator slots, thereby resolving the problem of hairpin coil breakdown due to a high voltage difference between different slot layers in the same stator slot.

[0044] One end of the stator winding 500 located at the head 501 of the first conductor 510 and the head 501 of the second conductor 520 may be a hairpin end 400. One end of the stator winding 500 located at the bent portion 503 of the first conductor 510 and the bent portion 503 of the second conductor 520 may be a welded end 200.

[0045] See FIGS. 1 to 3, 11, and 12. In some embodiments, each phase winding may include two branch windings. The node pitch of one portion of the second conductor 520 may be 7 slot pitches, and the node pitch of the other portion of the second conductor 520 may be 5 slot pitches. The second conductor 520 in one branch winding with a node pitch of 5 slot pitches and the second conductor 520 in the other branch winding with a node pitch of 7 slot pitches may be located in adjacent stator slots. That is, when one straight segment 502 of the second conductor 520 of the first branch winding and one straight segment 502 of the second conductor 520 of the second branch winding are located in adjacent stator slots, the other straight segment 502 of the second conductor 520 of the first branch winding and the other straight segment 502 of the second conductor 520 of the second branch winding are located in adjacent stator slots. That is, second conductors 520 with a node pitch of seven groove pitches surround second conductors 520 with a node pitch of five groove pitches.

[0046] As shown in Figures 11 and 12, when the incoming wire end of the first branch winding is located in the first groove layer of the stator slot No. 29, the outgoing wire end of this branch winding can be located in the first groove layer of the stator slot No. 22. When the incoming wire end of the second branch winding is located in the first groove layer of the stator slot No. 28, the outgoing wire end of the second branch winding can be located in the first groove layer of the stator slot No. 23. When the incoming wire end of the first branch winding is located in the first groove layer of the stator slot No. 29, the incoming wire end of the second branch winding can be located in the first groove layer of the stator slot No. 28. By winding using this winding method, the winding structure of each phase winding of the stator winding 500 can be optimized. This winding method allows the incoming wire end and outgoing wire end of each branch winding to be located on the same side of the stator winding 500, making full use of the height of the weld end 200.

[0047] Because the input ends of the two branch windings are located in adjacent stator slots, they can be easily welded together. Similarly, because the output ends of the two branch windings are located in adjacent stator slots, they can be easily welded together. In this case, the two branch windings are connected in parallel. In some embodiments, the two branch windings can also be connected in series. For example, the output end of one branch winding can be connected to the input end of the other branch winding via a lead wire. Connecting the two branch windings as phase windings allows for adjustment of the number of branches, reduces the occurrence of unbalanced currents, prevents freewheeling, and prevents the motor from malfunctioning.

[0048] The second conductor 520 constitutes the second coil group. In the second coil group, the second conductor 520 with a node pitch of 7 groove pitches is located outside the second conductor 520 with a node pitch of 5 groove pitches. That is, the second conductor 520 with a node pitch of 7 groove pitches surrounds the second conductor 520 with a node pitch of 5 groove pitches. The first conductor 510 constitutes the first coil group. The first conductors 510 in the first coil group are on opposite sides of each other. The present invention solves the problem of nesting a large number of coils in a stator winding, reduces the height of the bent portions of the stator winding, improves motor efficiency, improves motor torque and power density, avoids circulating current in the stator winding, and reduces losses. It also reduces problems of insulation breakdown and high-voltage breakdown during the production of nested coils. Furthermore, the use of an odd number of winding layers solves the problem of distributing the number of series conductors for each phase, allowing motors to be designed to meet specific power and torque requirements.

[0049] See FIGS. 1 to 3, 5, and 9. In some embodiments, the motor stator may include a third conductor 530. In some embodiments, the third conductor 530 may include a head 501, a straight segment 502, and a bent portion 503. Here, the straight segment 502 may be used to insert into a stator groove. The two straight segment portions 502 of the third conductor 530 may be used to insert into different stator grooves. The head 501 may be connected between one ends of the two straight segment portions 502. The bent portion 503 may be connected to the other ends of the two straight segment portions 502. The third conductor 530 may constitute a third coil group. The third coil group may be located between the first coil group and the second coil group. Here, the number of third coil groups is at least one.

[0050] See Figures 1 to 3, 5, 9, and 11 to 12. In some embodiments, the straight segment portions 502 of the third conductor 530 may be located in adjacent groove layers on both sides. The node pitch of the third conductor 530 may be the same as the node pitch of the first conductor 510. The third conductor 530 and the first conductor 510 may be parallel to each other. When the node pitch of the third conductor is y3, y3 = y1 is satisfied.

[0051] 4 to 10. In some embodiments, the bent portions 503 of the second conductors 520 extend in the same direction. The second conductors 520 form a second coil group. The bent portions 503 of the second conductors 520 in the second coil group extend in the same direction, which may be clockwise or counterclockwise. The bent portions 503 of the third conductors 530 extend in opposite directions. The third conductors 530 form a third coil group. The bent portions 503 of one of the third conductors 530 in the third coil group may extend in the clockwise or counterclockwise direction, while the bent portions 503 of the other of the third conductors 530 may extend in the opposite direction. The first conductors 510 can form a first coil group. Here, the bent portions 503 of some of the first conductors 510 extend in the same direction, while the bent portions 503 of the other of the first conductors 510 may extend in the opposite direction. For example, the extending directions of the bent portions 503 of the first conductor 510 located between adjacent second conductors 520 may be opposite. One of the bent portions 503 of the first conductor 510 in this portion may extend counterclockwise or clockwise on the first coil group, while the extending direction of the other bent portion 503 of the first conductor 510 may be opposite. The extending directions of the bent portions 503 of the first conductor 510 located outside the second conductor 520 may be the same. The extending directions of the bent portions 503 of the first conductor 510 in this portion may extend counterclockwise or clockwise on the first coil group. The extending directions of the bent portions 503 of the first conductor 510, the second conductor 520, and the third conductor 530 are not particularly limited and must satisfy the wiring diagram shown in FIG. 12 .

[0052] Referring to FIG. 14 , in some embodiments, the present invention further proposes a motor including a motor stator 100 and a motor body 600. The motor stator 100 is attached to the motor body 600. The motor stator 100 includes a stator core 300 and a stator winding 500. The stator core 300 may have a stator groove. The stator groove may include multiple groove layers that can be arranged along the radial direction of the stator core 300. Here, the stator winding 500 can be inserted into the stator groove. The stator winding 500 may include a plurality of first conductors 510 and a plurality of second conductors 520. The first conductors 510 and the second conductors 520 may include two straight segment portions. Here, the multiple first conductors 510 can be located in two adjacent groove layers, respectively. The straight segment portions of the second conductors 520 and the straight segment portions of the first conductors 510 may be located in the same stator groove. The node pitch of the first conductors 510 is the same as the pole pitch of the stator winding 500. The spacing between the straight segment portions 502 of two adjacent first conductors 510 in the same groove layer may differ by one pitch compared to the pole pitch of the stator winding 500. The spacing between the straight segment portions 502 of two adjacent second conductors 520 is equal.

[0053] In summary, the present invention proposes a motor stator and a motor using the same. Since the conductors of one branch winding are not packed into the same stator slot, the problem of high voltage differences between layers of different slots in the same stator slot, which can lead to hair coil breakdown, is resolved. Since both the inlet and outlet ends of each branch winding are located on the same side of the stator winding, the height of the welding ends can be fully utilized. The present invention also solves the problem of nesting a large number of coils in the stator winding. By reducing the height of the bent portions of the stator winding, motor efficiency is improved, motor torque and power density are improved, and circulating current in the stator winding is avoided, reducing losses. Furthermore, problems of insulation breakdown and high-voltage breakdown during the production of nested coils are reduced. Furthermore, by using an odd number of winding layers, the problem of distributing the number of series conductors for each phase is resolved, allowing motors to be designed to meet specific power and torque requirements.

[0054] The above description merely describes preferred embodiments and the technical principles employed in the present application. Those skilled in the art should understand that the scope of the present invention is not limited to the specific combination of the above-described technical features, but should also include other technical embodiments formed by any combination of the above-described technical features or their equivalent features without departing from the gist of the invention, such as by substituting the above-described features with technical features having similar functions (but not limited to) disclosed in the present application.

[0055] Except for the technical features described in the specification, other technical features are well known to those skilled in the art, and in order to highlight the innovative features of the present invention, other technical features will not be described herein. [Explanation of symbols]

[0056] 100, motor stator, 200, welding terminal, 300, stator core, 400, hairpin terminal, 500, stator winding, 501, head, 502, straight segment portion, 503, bent portion, 510, first conductor, 511, first type conductor, 512, second type conductor, 520, second conductor, 530, third conductor, 600, motor body

Claims

1. A motor stator, a stator core having a stator groove including a plurality of groove layers; a stator winding inserted into the stator groove and including a plurality of first conductors and a plurality of second conductors; Including, the plurality of straight line segments of the first conductor are respectively located in two adjacent groove layers, each of the first conductor and the second conductor includes two straight line segments, and one straight line segment of the second conductor and one straight line segment of the first conductor are located in the same stator groove; When the pole pitch of the stator winding is τ, the node pitch of the second conductor is y2, the interval between two adjacent first conductors in the same groove layer is L1, and the interval between adjacent second conductors is L2, L1=τ+1 or L1=τ-1, L2=2τ-y2 are satisfied. A motor stator characterized by:

2. the stator winding further includes a third conductor located between the first conductor and the second conductor; 2. The motor stator according to claim 1, wherein the two straight line segment portions of the third conductor and the two straight line segment portions of the first conductor are respectively positioned in the same stator groove, and when a node pitch of the third conductor is y3, y3 = y1 is satisfied.

3. 3. The motor stator according to claim 2, wherein the number of groove layers occupied by the third conductor in the stator groove is at least two.

4. The motor stator of claim 1 , wherein the stator windings include at least one phase winding.

5. 5. The motor stator according to claim 4, wherein each phase winding includes at least two branch windings, and the branch windings are connected in series or in parallel.

6. 5. The motor stator of claim 4, wherein each of the phase windings includes two branch windings, and the straight segment portions of the second conductor of the two branch windings are located in adjacent stator slots.

7. 7. The motor stator according to claim 6, wherein the straight segment portions of the first conductors of the two branch windings are located in adjacent stator grooves.

8. The first conductor is a head portion connected between one ends of the two straight segment portions of the first conductor; a bent portion connected to the other end of each of the two straight segment portions of the first conductor; 10. The motor stator of claim 1, further comprising:

9. 9. The motor stator according to claim 8, wherein the extending directions of the bent portions of the first conductors located between adjacent second conductors are opposite to each other, and the extending directions of the bent portions of the first conductors located outside the second conductors are the same.

10. A motor, A motor body, a motor stator attached to the motor body; Including, The motor stator includes: a stator core having a stator groove including a plurality of groove layers; a stator winding inserted into the stator groove and including a plurality of first conductors and a plurality of second conductors; Including, the groove layer is arranged along a radial direction of the stator core, and the first conductor and the second conductor include two straight line segment portions; the plurality of straight line segments of the first conductor are respectively located in two adjacent groove layers, each of the first conductor and the second conductor includes two straight line segments, and one straight line segment of the second conductor and one straight line segment of the first conductor are located in the same stator groove; When the pole pitch of the stator winding is τ, the node pitch of the second conductor is y2, the interval between two adjacent first conductors in the same groove layer is L1, and the interval between adjacent second conductors is L2, L1=τ+1 or L1=τ-1, L2=2τ-y2 are satisfied. A motor characterized by:

Images