Short-distance winding stator and motor

Abstract

The invention discloses a short-distance winding stator and a motor, the short-distance winding stator comprises a stator winding and a stator core, the stator core comprises a plurality of stator slots, and each stator slot comprises 2N accommodating layers; the stator winding comprises a multi-phase winding structure, each phase winding structure comprises two coil groups which are connected in parallel, each coil group comprises a plurality of coil structures with the same span, each coil structure comprises two conductor edges which are connected with each other, and the two conductor edges of each coil structure are respectively inserted into the (2i-1) th layer and the 2i th layer of the accommodating layer; the plurality of coil structures of each coil group are connected through connecting terminals and are connected with an external circuit through lead terminals, the connecting terminals and the lead terminals are arranged at the welding ends of the coil structures, and the plurality of connecting terminals and the plurality of lead terminals are adjacently arranged along the circumferential direction of the stator iron core. According to the short-distance winding stator and the motor, circuit connection of the short-distance winding in the stator can be facilitated, and the overall process difficulty and the manufacturing cost of the short-distance winding stator are reduced.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and in particular relates to a short-pitch winding stator and a motor. Background Art

[0002] In the stator of the motor, the winding can be divided into short-pitch winding and full-pitch winding according to the relationship between the winding span and the motor slot pitch. The use of short-pitch winding can further reduce the torque pulsation and NVH (Noise, Vibration and Harshness) of the motor.

[0003] At present, in the existing short-pitch winding scheme, coils with different spans are usually staggered to form a short-pitch winding, and the stator is wound by a cross-layer wire method, which leads to an increase in the types of coils and is inconvenient to connect several parallel branches in each phase winding, thereby increasing the overall process difficulty of the short-pitch winding stator and causing high manufacturing costs. Summary of the invention

[0004] The present application provides a short-pitch winding stator and a motor, which can facilitate the circuit connection of the short-pitch winding in the stator and reduce the overall process difficulty and manufacturing cost of the short-pitch winding stator.

[0005] The present application provides a short-pitch winding stator, which includes a stator winding and a stator core, the stator core includes a plurality of stator slots, each of which includes 2N layers of accommodation layers; the stator winding includes a multi-phase winding structure, each phase winding structure includes two parallel coil groups, the coil group includes a plurality of coil structures with the same span, the coil structure includes two connected conductor sides, and the two conductor sides of each coil structure are respectively inserted into the 2i-1 layer and the 2i layer of the accommodation layer; the plurality of coil structures of each coil group are connected to each other through connecting terminals and connected to an external circuit through lead terminals, the connecting terminals and the lead terminals are both arranged at the welding end of the coil structure, and the plurality of connecting terminals and the plurality of lead terminals are adjacently arranged along the circumferential direction of the stator core.

[0006] As above, the short-pitch winding stator, wherein each coil group includes three groups of coil structures, the three groups of coil structures are respectively arranged in three stator slots continuous along the circumferential direction, and each group includes a plurality of connected coil structures; at the input and output ends of the coil group, two adjacent groups of coil structures are connected through connecting terminals, and the third group of coil structures is connected to the external circuit through a lead terminal.

[0007] In the short-pitch winding stator as above, in the coil group, one of the connecting terminals is connected to the innermost coil structure of the stator slot, and the other connecting terminal is connected to the outermost coil structure of the stator slot.

[0008] As above, the short-pitch winding stator, wherein the lead terminal includes an incoming terminal and an outgoing terminal, the incoming terminal is connected to the innermost coil structure of the stator slot, and the outgoing terminal is connected to the outermost coil structure of the stator slot; or, the incoming terminal is connected to the outermost coil structure of the stator slot, and the outgoing terminal is connected to the innermost coil structure of the stator slot.

[0009] As shown in the short-pitch winding stator above, the coil structure also has two connecting edges, which are respectively connected to the two conductor edges at the welding ends, and the twisting directions of the two connecting edges are opposite; in the coil structure with a connecting terminal, the connecting terminal is connected to one of the connecting edges, and the two ends of the connecting terminal are respectively connected to the two connecting edges with the same twisting direction to connect the two coil structures of the same coil group.

[0010] As above, the short-pitch winding stator, wherein the end of each connecting edge has a welding portion parallel to the conductor edge, and the coil structure is connected to the corresponding coil structure through the welding portion; the connecting terminal includes a terminal connecting portion and a terminal extension portion connected to both ends of the terminal connecting portion, and the two terminal extension portions are respectively connected to the welding portions of the two coil structures.

[0011] As above, the short-pitch winding stator, wherein the stator winding also includes a copper bar assembly, the copper bar assembly includes a first connecting copper bar and a second connecting copper bar, the two incoming terminals of each phase winding structure are connected through the first connecting copper bar, and the first connecting copper bars are arranged at intervals, and all the outgoing terminals of the multi-phase winding structure are connected through the second connecting copper bar, and the first connecting copper bars and the second connecting copper bars are arranged at intervals.

[0012] In the short-pitch winding stator as above, the first connecting copper bars and the second connecting copper bars are spaced apart from each other in the axial direction of the stator winding, and at least part of the first connecting copper bars are at the same height in the axial direction.

[0013] As shown in the above short-pitch winding stator, the stator core includes 54 stator slots distributed along the circumferential direction, the stator winding includes a 3-phase winding structure, the number of pole pairs of the short-pitch winding stator is 3, the span of the coil structure is 8, and the twist span of the connecting edge is 10.

[0014] On the other hand, the present application also provides a motor, which includes the above-mentioned short-pitch winding stator.

[0015] The short-pitch winding stator of the present application includes a stator winding and a stator core. The stator core includes a plurality of stator slots with 2N layers of accommodation layers. The stator winding includes a multi-phase winding structure. Each phase winding structure includes two parallel coil groups. The two conductor sides of each coil structure in each coil group only span the 2i-1 layer and the 2i-th accommodation layer, so there is no need to use a cross-layer coil from the 2i layer to the 2i+1 layer, which reduces the types of coil structures. When the coil structure of each coil group is connected from the 2i layer to the 2i+1 layer, it is only necessary to weld at the welding end. The use of such a coil structure setting method facilitates the circuit connection of the short-pitch winding and facilitates the connection terminal to the coil structure in the same coil group, reducing the difficulty of arranging the connection terminal.

[0016] In addition, multiple connecting terminals and multiple lead terminals are arranged adjacent to each other along the circumferential direction, so that multiple connecting terminals and multiple lead terminals can be centrally arranged at the welding end, which is convenient for connecting the same-phase lead terminals and further reduces the difficulty of arranging the connecting terminals and lead terminals, thereby reducing the overall process difficulty and manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the short-pitch winding stator of an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the connection between the coil structure and the connection terminals of the short-pitch winding stator according to an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of a common coil structure of a short-pitch winding stator in an embodiment of the present application;

[0021] Figure 4 A schematic structural diagram of a coil structure connected to a connection terminal of a short-pitch winding stator according to an embodiment of the present application;

[0022] Figure 5 A connection diagram of two coil structures of a short-pitch winding stator of an embodiment of the present application connected via a connection terminal;

[0023] Figure 6 This is a schematic structural diagram of a copper bar assembly of a short-pitch winding stator in an embodiment of the present application;

[0024] Figure 7 This is a partial expanded view of the stator winding of the short-pitch winding stator according to an embodiment of the present application.

[0025] Description of Figure Numbers:

[0026] 100, stator winding; 200, stator core; 210, stator slot;

[0027] 10. Winding structure; 20. Coil group; 30. Coil structure; 31. Conductor edge; 32. Connecting terminal; 321. Terminal connecting part; 322. Terminal extension part; 33. Lead terminal; 34. Incoming terminal; 35. Outgoing terminal; 36. Connecting edge; 361. Welding part; 40. Welding end; 50. Crown end; 60. Copper busbar assembly; 61. First connecting copper busbar; 611. First connecting plate; 612. First lead-out end; 613. Second lead-out end; 62. Second connecting copper busbar. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0029] In the current automotive industry, the stator of the motor usually adopts the matching scheme of 54 slots and 6 poles and 48 slots and 8 poles. Compared with the 48 slots and 8 poles motor, the 54 slots and 6 poles motor has higher high-speed and low-torque efficiency. In addition, the 54 slots and 6 poles motor has more stator slots and smaller stator slots, so the size of the flat wire set in the slot is smaller, which can reduce the AC copper loss and further improve the efficiency in the high-speed zone. In addition, the number of slots per pole and per phase of the 54 slots and 6 poles motor is increased from 2 to 3, and the NVH (Noise, Vibration and Harshness) performance is also better.

[0030] The winding needs to be wound in the stator slot of the motor. According to the relationship between the winding span and the motor slot pitch, the winding can be divided into short-pitch winding and full-pitch winding. In the three-phase winding line voltage, there is no third harmonic, so the fifth and seventh harmonics are mainly eliminated. Through calculation, the approximate span of 5 or 6 times the full pitch can be used to eliminate the fifth and seventh harmonics. This span is called short pitch. For example, for a 54-slot 6-pole solution, the full pitch is 9 and the short pitch is 8. The use of short-pitch windings can further reduce the torque pulsation and NVH of the motor.

[0031] In the existing technical solutions, coils with different spans are usually staggered to form short-pitch windings, and the stator is wound by cross-layer wires, which increases the types of coils and is inconvenient to connect several parallel branches in each phase winding, thereby increasing the overall process difficulty of the short-pitch winding stator and increasing the manufacturing cost. In order to solve this technical problem, the present application designs the internal stator structure of a 54-slot 6-pole motor and proposes a short-pitch winding stator and motor. The following are embodiments of the short-pitch winding stator and motor.

[0032] like Figures 1 to 7 As shown, an embodiment of the present application provides a short-pitch winding stator, which includes a stator winding 100 and a stator core 200, the stator core 200 includes a plurality of stator slots 210, and each stator slot 210 includes a 2N-layer accommodation layer; the stator winding 100 includes a multi-phase winding structure 10, each phase winding structure 10 includes two parallel coil groups 20, the coil group 20 includes a plurality of coil structures 30 with the same span, the coil structure 30 includes two connected conductor sides 31, and the two conductor sides 31 of each coil structure 30 are respectively inserted into the 2i-1 layer and the 2i layer of the accommodation layer; the plurality of coil structures 30 of each coil group 20 are connected to each other through connecting terminals 32 and connected to an external circuit through lead terminals 33, the connecting terminals 32 and the lead terminals 33 are both arranged at the welding end 40 of the coil structure 30, and the plurality of connecting terminals 32 and the plurality of lead terminals 33 are adjacently arranged along the circumferential direction of the stator core 200.

[0033] In the embodiment of the present application, the stator core 200 includes 54 stator slots 210 distributed along the circumferential direction, the stator winding 100 includes a 3-phase winding structure 10, and the number of pole pairs of the short-pitch winding stator is 3, so the number of slots per pole per phase is q is 3. In addition, the number of accommodating layers in the stator slot 210 can be 6, 8 or 10 layers, and specifically 8 layers in the embodiment of the present application.

[0034] like Figure 7 As shown, each phase winding structure 10 includes two parallel coil groups 20. In the entire stator winding 100, there are 6 coil groups 20, namely U1, U2, V1, V2, W1, and W2. Among them, the 6 coil groups 20 all have a first end and a second end. The first ends of the two parallel coil groups 20 in each phase winding structure 10 are connected to form the input end of each phase winding structure 10; the second ends of the 6 coil groups 20 are connected to a point to form the input end of each phase winding structure 10. The connection point is a neutral point, thereby forming a star connection of the three-phase winding structure 10.

[0035] The stator winding 100 has a welding end 40 and a crown end 50, that is, the coil structure 30 has a welding end 40 and a crown end 50, and the two coil conductor edges 31 of the coil structure 30 are connected at the crown end 50, and the welding end 40 is connected to the connecting edges 36, the connecting terminals 32 or the lead terminals 33 of the coil structure 30 on both sides through the connecting edges 36.

[0036] Moreover, in the embodiment of the present application, the span of the coil structure 30 is 8, that is, at the crown end 50, the overall span of the coil structure 30 is 8, which is smaller than the pitch 9 of the motor, thereby meeting the requirements of the short-pitch winding, and under the condition that there is only one span at the crown end 50, it is convenient to insert the wires, thereby reducing the overall process cost; the twist span of the connecting edge 36 is 10, so that the overall winding and connection of the stator winding 100 meet the requirements of the motor, and under the condition that the overall twist span is 10, it is also convenient to twist the connecting edge 36, thereby reducing the overall process difficulty.

[0037] In specific implementation, the short-pitch winding stator of the embodiment of the present application includes a stator winding 100 and a stator core 200, the stator core 200 includes a plurality of stator slots 210 with 2N layers of accommodation layers, and the stator winding 100 includes a multi-phase winding structure 10, each phase winding structure 10 includes two parallel coil groups 20, and the two conductor sides 31 of each coil structure 30 in each coil group 20 are only arranged across the 2i-1 layer and the 2i-th layer of accommodation layer, so there is no need to use a cross-layer coil from the 2i layer to the 2i+1 layer, thereby reducing the types of coil structures 30. When the coil structures 30 of each coil group 20 are connected from the 2i layer to the 2i+1 layer, only welding is required at the welding end 40. The arrangement of the coil structure 30 in this way facilitates the circuit connection of the short-pitch winding, and facilitates the connection terminal 32 to connect the coil structure 30 in the same coil group 20, thereby reducing the difficulty of arranging the connection terminal 32.

[0038] In addition, multiple connecting terminals 32 and multiple lead terminals 33 are arranged adjacent to each other along the circumferential direction, so that multiple connecting terminals 32 and multiple lead terminals 33 are concentratedly arranged at the welding end 40, which is convenient for connecting the same-phase lead terminals 33, further reducing the difficulty of arranging the connecting terminals 32 and the lead terminals 33, thereby reducing the overall process difficulty and manufacturing cost.

[0039] like Figure 1 and Figure 7As shown, the short-pitch winding stator of the embodiment of the present application, wherein each coil group 20 includes three groups of coil structures 30, and the three groups of coil structures 30 are respectively arranged in three stator slots 210 continuous along the circumferential direction, so that the pole slot matching number q is 3, and each group includes a plurality of connected coil structures 30, and each group of connected coil structures 30 can be connected from the 1st layer to the 2Nth layer, thereby realizing the winding of each coil group 20 in multiple stator slots 210.

[0040] At the input and output ends of the coil group 20, two groups of adjacent coil structures 30 are connected through a connection terminal 32, and the third group of coil structures 30 is connected to an external circuit through a lead terminal 33. When performing specific settings, at the input end of the coil group 20, among the three coil structures 30 sequentially arranged in three stator slots 210, the first coil structure 30 is connected to an external circuit through a lead terminal 33, and the second and third coil structures 30 are connected through a connection terminal 32; at the output end of the coil group 20, among the three coil structures 30 sequentially arranged in three stator slots 210, the first and second coil structures 30 are connected through a connection terminal 32, and the third coil structure 30 is connected to an external circuit through a lead terminal 33. By adopting this connection method, the input and output of the coil group 20 at both ends can be completed, and each group of coil structures 30 in the coil group 20 can be connected to form a complete loop from the input end to the output end.

[0041] In the short-pitch winding stator of the embodiment of the present application, in the coil group 20, one of the connection terminals 32 is connected to the innermost coil structure 30 of the stator slot 210, and the other connection terminal 32 is connected to the outermost coil structure 30 of the stator slot 210. The two connection terminals 32 of all coil groups 20 are respectively arranged at the innermost accommodating layer and the outermost accommodating layer of the stator slot 210. When the stator winding 100 is arranged, all the connection terminals 32 can be divided into two layers, that is, arranged at the innermost layer and the outermost layer of the stator core 200, thereby reducing the difficulty of arrangement, and also reducing the overall process difficulty and manufacturing cost.

[0042] The lead terminal 33 includes an input terminal 34 and an output terminal 35, the input terminal 34 is connected to the innermost coil structure 30 of the stator slot 210, and the output terminal 35 is connected to the outermost coil structure 30 of the stator slot 210; or, the input terminal 34 is connected to the outermost coil structure 30 of the stator slot 210, and the output terminal 35 is connected to the innermost coil structure 30 of the stator slot 210.

[0043] The incoming terminal 34 and the outgoing terminal 35 are arranged at the innermost layer or the outermost layer of the stator slot 210. When the stator winding 100 is arranged, the incoming terminal 34 and the outgoing terminal 35 will not have more layers, which is convenient for the connection of the copper busbar assembly 60, thereby reducing the difficulty of arranging the incoming terminal 34, the outgoing terminal 35 and the copper busbar assembly 60, and also reducing the overall process difficulty and manufacturing cost.

[0044] exist Figure 7 In the figure, the three coil groups 20 marked are U1, V1 and W1 coil groups, respectively. Taking the U-phase winding structure 10 as an example, the first side conductor edges 31 of the three coil structures 30 corresponding to the input end of the three coil structures 30 of the U1 coil group 20 are respectively arranged at the innermost layers of the 54th, 1st and 2nd slots, the conductor edge 31 in the 54th slot is connected to the incoming terminal 34, and the two conductor edges 31 in the 1st and 2nd slots are connected through the connecting terminal 32; the second side conductor edges 31 of the three coil structures 30 corresponding to the output end of the three coil structures 30 of the U1 coil group 20 are respectively arranged at the outermost layers of the 44th, 45th and 46th slots, the two conductor edges 31 in the 44th and 45 slots are connected through the connecting terminal 32, and the conductor edge 31 in the 46th slot is connected to the outgoing terminal 35. In the complete loop of the U1 coil group 20, the U-phase current enters from the incoming terminal 34 and flows out from the outgoing terminal 35. In the subsequent winding of the coil structure 30, the six coil groups 20 of U1, V1, W1, U2, V2, and W2 are arranged in sequence in the stator slots 210 along the circumferential direction, and in adjacent coil groups 20, the two incoming terminals 34 are respectively arranged at the innermost layer and the outermost layer, and the two outgoing terminals 35 are respectively arranged at the innermost layer and the outermost layer.

[0045] It should be noted that the specific arrangement position of the coil structure 30 described above is only for illustration, and the position can be changed and the winding of the coil structure 30 can be changed according to actual needs.

[0046] like Figures 3 to 5 As shown, the short-pitch winding stator of an embodiment of the present application, wherein the coil structure 30 also has two connecting edges 36, and the two connecting edges 36 are respectively connected to the two conductor edges 31 at the welding end 40, and the twisting directions of the two connecting edges 36 are opposite; in the coil structure 30 with a connecting terminal 32, the connecting terminal 32 is connected to one of the connecting edges 36, and the two ends of the connecting terminal 32 are respectively connected to the two connecting edges 36 with the same twisting direction, so as to connect the two coil structures 30 of the same coil group 20.

[0047] In a coil structure 30, a connecting edge 36 connected to a conductor edge 31 is twisted so as to be connected to a connecting edge 36 of an adjacent coil structure 30 that is also twisted, and in adjacent coil structures 30, two connected connecting edges 36 are twisted in directions approaching each other so as to be welded together.

[0048] In the coil structure 30 with the connecting terminal 32, the two ends of the connecting terminal 32 are respectively connected to two connecting edges 36 with the same twisting direction. Since the two connecting edges 36 have the same twisting direction and the same twisting span, the interval between the two connecting edges 36 is small, which facilitates the connection between the two through the connecting terminal 32, thereby reducing the process difficulty when setting the connecting terminal 32.

[0049] like Figures 3 to 5 As shown, the short-pitch winding stator of an embodiment of the present application, wherein the end of each connecting edge 36 has a welding portion 361 parallel to the conductor edge 31, and the coil structure 30 is connected to the corresponding coil structure 30 through the welding portion 361, and each welding portion 361 is arranged in parallel. When welding between two welding portions 361, the welding process is less difficult, which facilitates the welding connection of multiple coil structures 30; the connecting terminal 32 includes a terminal connecting portion 321 and a terminal extension portion 322 connected to both ends of the terminal connecting portion 321, and the two terminal extension portions 322 are respectively connected to the welding portions 361 of the two coil structures 30.

[0050] In a specific implementation, the two terminal extensions 322 of the connection terminal 32 can be welded to the welding portions 361 of the two coil structures 30 respectively, and the two terminal extensions 322 can be conductively connected through the terminal connection portion 321, thereby achieving connection between the two coil structures 30.

[0051] Specifically, the extension direction of the two terminal extensions 322 is parallel to the extension direction of the welding portion 361, so that the welding operation between the terminal extensions 322 and the welding portion 361 is facilitated, and the difficulty of the welding process is reduced. Figure 4 As shown, in the coil structure 30 with the connecting terminal 32, the soldering portion 361 of the coil structure 30 extends longer than Figure 3 The extended length of the welding portion 361 of the ordinary coil structure 30 can increase the contact area between the welding portion 361 and the terminal extension portion 322, thereby ensuring the connection strength between the two. In addition, the larger contact area makes it easier to perform welding operations, reducing the process difficulty of the welding operation.

[0052] like Figure 6 As shown, the short-pitch winding stator of the embodiment of the present application, wherein the stator winding 100 also includes a copper bar assembly 60, the copper bar assembly 60 includes a first connecting copper bar 61 and a second connecting copper bar 62, the two incoming terminals 34 of each phase winding structure 10 are connected through the first connecting copper bar 61, and the first connecting copper bars 61 are arranged at intervals, and all the outgoing terminals 35 of the multi-phase winding structure 10 are connected through the second connecting copper bar 62, and the first connecting copper bars 61 and the second connecting copper bars 62 are arranged at intervals.

[0053] In a specific implementation, the first connecting copper bars 61 of the copper bar assembly 60 are arranged at intervals, which can avoid the situation where a conductive connection occurs between the incoming terminals 34 of each phase winding structure 10, thereby realizing the three-phase incoming line of the stator winding 100; and the first connecting copper bars 61 and the second connecting copper bars 62 are arranged at intervals, which can avoid the situation where a conductive connection occurs between the incoming terminal 34 and the outgoing terminal 35, thereby realizing the connection between all the outgoing terminals 35 of the multi-phase winding structure 10, and completing the star connection of the stator winding 100.

[0054] like Figure 6 As shown, in the short-pitch winding stator of the embodiment of the present application, the first connecting copper bars 61 are spaced apart from each other in the axial direction of the stator winding 100 , and at least part of the first connecting copper bars 61 are at the same height in the axial direction.

[0055] In specific implementation, the first copper bar 61 and the second copper bar 62 are arranged at intervals in the axial direction, so that the first copper bar 61 and the second copper bar 62 can be at different heights, avoiding positional conflicts between the first copper bar 61 and the second copper bar 62, and contact between the two, resulting in conductive connection between the input terminal 34 and the output terminal 35. The first copper bar 61 only needs to connect the two input terminals 34 of the same phase, so the extension length of the first copper bar 61 is shorter, so that at least part of the first copper bar 61 can be at the same height in the axial direction, and the first copper bar 61 will not be in contact. Such an arrangement can reduce the number of overall layout layers of the first copper bar 61 and the second copper bar 62, and optimize the overall longitudinal space of the motor.

[0056] Specifically, the copper busbar assembly 60 includes three first connecting copper busbars 61, wherein the first connecting plates 611 of two first connecting copper busbars 61 spaced apart in the circumferential direction are at the same height, and the first connecting plate 611 of the middle first connecting copper busbar 61 is at a different height from the other two first connecting plates 611. The double-layer structure of the first connecting copper busbar 61 can form a three-layer stacked structure with the second connecting copper busbar 62. Compared with the copper busbar structure that independently forms a layer structure, the copper busbar assembly 60 in the embodiment of the present application optimizes the overall stacking number, reduces the axial size of the motor, ensures sufficient creepage distance, and avoids safety problems.

[0057] In the first connecting copper bar 61, the first connecting plate 611 is an arc-shaped plate-like structure and is extended in the circumferential direction. The first connecting copper bar 61 includes two first lead-out terminals 612, which are respectively arranged on both sides of the first connecting plate 611 for connecting the same-phase incoming line terminals 34 located at the innermost and outermost layers of the stator slot 210, and the second lead-out terminal 613 is arranged on the outer side of the first connecting plate 611 for external incoming line convenience; in the second connecting copper bar 62, the second connecting plate is an arc-shaped plate-like structure and is extended in the circumferential direction. The second connecting copper bar 62 includes three groups of third lead-out terminals, each group of third lead-out terminals includes two third lead-out terminals, and the two third lead-out terminals of each group are respectively arranged on both sides of the second connecting plate for connecting the same-phase outgoing line terminals 35 at the innermost and outermost layers.

[0058] An embodiment of the present application also provides a motor, which includes the above-mentioned short-pitch winding stator.

[0059] In a specific implementation, the motor includes the above-mentioned short-pitch winding stator, the short-pitch winding stator includes a stator winding 100 and a stator core 200, the stator core 200 includes a plurality of stator slots 210 with 2N layers of accommodation layers, the stator winding 100 includes a multi-phase winding structure 10, each phase winding structure 10 includes two parallel coil groups 20, and the two conductor sides 31 of each coil structure 30 in each coil group 20 are only arranged across the 2i-1 layer and the 2i-th layer of accommodation layer, so there is no need to use a cross-layer coil from the 2i-th layer to the 2i+1-th layer, thereby reducing the types of coil structures 30, and when the coil structures 30 of each coil group 20 are connected from the 2i-th layer to the 2i+1-th layer, it is only necessary to weld at the welding end 40, and the arrangement of the coil structure 30 in this way is convenient for the circuit connection of the short-pitch winding, and convenient for the connection terminal 32 to connect the coil structure 30 in the same coil group 20, thereby reducing the difficulty of arranging the connection terminal 32. In addition, multiple connecting terminals 32 and multiple lead terminals 33 are arranged adjacent to each other along the circumferential direction, so that multiple connecting terminals 32 and multiple lead terminals 33 are concentratedly arranged at the welding end 40, which is convenient for connecting the same-phase lead terminals 33, further reducing the difficulty of arranging the connecting terminals 32 and the lead terminals 33, thereby reducing the overall process difficulty and manufacturing cost.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0061] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A short-pitch winding stator, characterized in that: It comprises a stator winding (100) and a stator core (200), wherein the stator core (200) comprises a plurality of stator slots (210), and each of the stator slots (210) comprises 2N accommodating layers; The stator winding (100) comprises a multi-phase winding structure (10), each phase of the winding structure (10) comprises two parallel coil groups (20), the coil group (20) comprises a plurality of coil structures (30) with the same span, the coil structure (30) comprises two connected conductor sides (31), and the two conductor sides (31) of each coil structure (30) are respectively plugged into the 2i-1th layer and the 2ith layer of the accommodation layer; The plurality of coil structures (30) of each coil group (20) are connected to each other via a connecting terminal (32) and are connected to an external circuit via a lead terminal (33); the connecting terminal (32) and the lead terminal (33) are both arranged at a welding end (40) of the coil structure (30), and the plurality of connecting terminals (32) and the plurality of lead terminals (33) are adjacently arranged along the circumferential direction of the stator core (200).

2. The short-pitch winding stator according to claim 1, characterized in that: Each of the coil groups (20) includes three groups of coil structures (30), the three groups of coil structures (30) are respectively arranged in three stator slots (210) that are continuous along the circumferential direction, and each group includes a plurality of connected coil structures (30); At the input end and the output end of the coil group (20), two groups of adjacent coil structures (30) are connected via the connecting terminals (32), and the third group of coil structures (30) is connected to an external circuit via a lead terminal (33).

3. The short-pitch winding stator according to claim 2, characterized in that: In the coil group (20), one of the connection terminals (32) is connected to the innermost coil structure (30) of the stator slot (210), and the other connection terminal (32) is connected to the outermost coil structure (30) of the stator slot (210).

4. The short-pitch winding stator according to claim 2, characterized in that: The lead terminal (33) comprises an incoming terminal (34) and an outgoing terminal (35), wherein the incoming terminal (34) is connected to the innermost layer of the coil structure (30) of the stator slot (210), and the outgoing terminal (35) is connected to the outermost layer of the coil structure (30) of the stator slot (210); Alternatively, the incoming terminal (34) is connected to the coil structure (30) at the outermost layer of the stator slot (210), and the outgoing terminal (35) is connected to the coil structure (30) at the innermost layer of the stator slot (210).

5. The short-pitch winding stator according to claim 2, characterized in that: The coil structure (30) further comprises two connecting edges (36), the two connecting edges (36) being respectively connected to the two conductor edges (31) at the welding end (40), and the twisting directions of the two connecting edges (36) are opposite; In the coil structure (30) having the connecting terminal (32), the connecting terminal (32) is connected to one of the connecting edges (36), and two ends of the connecting terminal (32) are respectively connected to two connecting edges (36) with the same twisting direction, so as to connect two coil structures (30) of the same coil group (20).

6. The short-pitch winding stator according to claim 5, characterized in that: The end of each connecting edge (36) has a welding portion (361) parallel to the conductor edge (31), and the coil structure (30) is connected to the corresponding coil structure (30) via the welding portion (361); The connecting terminal (32) comprises a terminal connecting portion (321) and a terminal extending portion (322) connected to both ends of the terminal connecting portion (321), and the two terminal extending portions (322) are respectively connected to the welding portions (361) of the two coil structures (30).

7. The short-pitch winding stator according to claim 4, characterized in that: The stator winding (100) further comprises a copper bar assembly (60), wherein the copper bar assembly (60) comprises a first connecting copper bar (61) and a second connecting copper bar (62), wherein the two incoming terminals (34) of each phase of the winding structure (10) are connected via the first connecting copper bar (61), wherein the first connecting copper bars (61) are arranged at intervals, and all the outgoing terminals (35) of the multi-phase winding structure (10) are connected via the second connecting copper bar (62), wherein the first connecting copper bars (61) and the second connecting copper bars (62) are arranged at intervals.

8. The short-pitch winding stator according to claim 7, characterized in that: The first connecting copper bar (61) and the second connecting copper bar (62) are arranged at intervals along the axial direction of the stator winding (100), and at least part of the first connecting copper bar (61) is at the same height in the axial direction.

9. The short-pitch winding stator according to claim 1, characterized in that: The stator core (200) includes 54 stator slots (210) distributed along the circumferential direction, the stator winding (100) includes a three-phase winding structure (10), the number of pole pairs of the short-pitch winding stator is 3, the span of the coil structure (30) is 8, and the twist span of the connecting edge (36) of the coil structure (30) is 10.

10. A motor, characterized in that: The invention comprises a short-pitch winding stator as claimed in any one of claims 1 to 9.

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