CN212462900U - Motor stator and motor - Google Patents

Abstract

The utility model relates to a motor field discloses a motor stator and motor, include: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; the stator winding is three-phase, the number of slots of each phase of each pole is Q, the phase winding is provided with P poles, and two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core; the utility model discloses a winding structure has adopted complete symmetrical structure on magnetic circuit, has eliminated because the circulation current problem that asymmetric structure produced adopts less U-shaped conductor, simplifies manufacturing procedure, reduces the height of weld end, has reduced manufacturing cost, improves machining efficiency.

Description

Motor stator and motor

Technical Field

The utility model relates to a motor field especially relates to a motor stator and motor.

Background

In the prior art, a stator winding comprises various conductors, the various conductors comprise U-shaped conductors, and coils of the various conductors penetrate into a slot of a stator core according to a certain arrangement mode to form a required single-phase winding or multi-phase winding of a motor. The hairpin coils used in the prior art are various, the manufacturing process is complex, the production cost is high, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and motor has adopted complete symmetrical structure on magnetic circuit through the winding structure, has eliminated because the circulation current problem that asymmetric structure produced adopts less U-shaped conductor, simplifies manufacturing procedure, reduces the height of weld end, has reduced manufacturing cost, improves machining efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

an electric machine stator comprising:

a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase;

the stator winding is three-phase, the number of slots of each phase of each pole is Q, the phase winding is provided with P poles, and two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core;

the stator winding includes: the multiple plug terminals are positioned outside the stator core slot, the other ends of the multiple plug terminals are connected with the insides of two slots of the same U-shaped conductor, the pitch between the insides of the slots corresponding to one part of the multiple plug terminals is a long pitch, and the pitch between the insides of the slots corresponding to the other part of the multiple plug terminals is a short pitch;

the stator winding further includes: each connecting area part is provided with a plurality of connecting parts which are sequentially positioned at one end outside the stator core slot along the radial direction of the stator core, and each connecting part is formed by connecting one welding end of a first U-shaped conductor with one welding end of a second U-shaped conductor;

the 3 × Q × P connection region portions include:

a first connection region portion having a same pitch between two soldering terminals corresponding to a plurality of first connection portions,

and the pitch between two welding ends corresponding to the plurality of second connecting parts of the second connecting region part is at least partially different from the pitch between two welding ends corresponding to the plurality of first connecting parts of the first connecting region part, and the number of the second connecting region parts is 2x 3x Q.

Further, when Q is equal to 2, the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductors corresponding to each connection portion of each branch winding is a long pitch, the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductors corresponding to the connection portion is a short pitch, and when Q is equal to 3, the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductors corresponding to part of the connection portions of each branch winding is a long pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductors corresponding to the connection portion is a short pitch.

Furthermore, the two branch windings of the phase winding of the stator winding have outgoing lines, the outgoing line of the first branch winding of the phase winding is located in the first 3 × Q second connection region portions, and the outgoing line of the second branch winding of the phase winding is located in the second 3 × Q second connection region portions.

Furthermore, each branch winding of the phase winding comprises N sub-branch windings, each sub-branch winding is positioned on one radial side of the stator core and sequentially connected with P/2 poles to the other radial side of the stator core in series along the circumferential direction of the stator core, the N sub-branch windings are positioned in 3x Q second connection area parts and are connected in series along the radial direction of the stator core, and N is the same as Q.

Further, the N sub-branch windings of each branch winding in the phase winding are located in the Q circumferentially adjacent slots of the stator core.

Further, the lead wires of the two branch windings of the phase winding are positioned on the radially innermost side or the radially outermost side of the second connection region portion.

Furthermore, each slot is divided into M layers by the number of conductors in the slot which can be accommodated by the stator winding along the radial direction of the stator core, M is an even number which is more than or equal to 4, and the pitch between two welding ends corresponding to the plurality of first connecting parts of the first connecting area part is a whole pitch.

Further, when M is equal to 4, the pitch between the two welding terminals corresponding to the second connection portion of the second connection region portion is a long pitch.

Further, when M is greater than 4, the pitch between the two welding ends corresponding to only one second connecting portion in the second connecting region portion is a long pitch, and the second connecting portion may be located at any position in the radial direction of the second connecting region portion; the pitch between the two welding ends corresponding to the rest second connecting parts in the second connecting area is a whole pitch.

Furthermore, the extending directions of the welding end of the first connecting region part and the welding end of the second connecting region part in the same layer of the stator core in the radial direction in the 3 × Q × P connecting region parts are the same, and the groove pitch of the welding end of the second connecting region part at least partially in the same layer of the stator core in the radial direction is different from the groove pitch of the welding end of the first connecting region part.

In order to achieve the above object, the present invention also provides a motor including the above motor stator.

Use the technical scheme of the utility model, a motor stator and motor: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; the stator winding is three-phase, the number of slots of each phase of each pole is Q, the phase winding is provided with P poles, and two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core; the stator winding includes: the multiple plug terminals are positioned outside the stator core slot, the other ends of the multiple plug terminals are connected with the insides of two slots of the same U-shaped conductor, the pitch between the insides of the slots corresponding to one part of the multiple plug terminals is a long pitch, and the pitch between the insides of the slots corresponding to the other part of the multiple plug terminals is a short pitch; the stator winding further includes: each connecting area part is provided with a plurality of connecting parts which are sequentially positioned at one end outside the stator core slot along the radial direction of the stator core, and each connecting part is formed by connecting one welding end of a first U-shaped conductor with one welding end of a second U-shaped conductor; the 3 × Q × P connection region portions include: the pitch between two welding ends corresponding to a plurality of first connecting parts of the first connecting area part is the same, the pitch between two welding ends corresponding to a plurality of second connecting parts of the second connecting area part is at least partially different from the pitch between two welding ends corresponding to a plurality of first connecting parts of the first connecting area part, and the number of the second connecting area parts is 2x 3x Q. The winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of circulating current generated by an asymmetrical structure, adopts fewer U-shaped conductors, simplifies the manufacturing process, reduces the height of a welding end, reduces the production cost and improves the processing efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a motor stator according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of an axial side of a stator winding according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a phase stator winding according to a first embodiment of the present invention;

FIG. 4 is a schematic view of an insulation paper in a slot of a stator of a first motor according to an embodiment of the present invention;

FIG. 5 is a schematic view of the second embodiment of the present invention illustrating the insulation paper in the slots of the stator of the motor;

FIG. 6 is a schematic view of an insulation paper in a stator slot of a third motor according to an embodiment of the present invention;

FIG. 7 is a schematic view of an insulation paper in a slot of a fourth motor stator according to an embodiment of the present invention;

fig. 8 shows a U-shaped conductor set according to a first embodiment of the present invention;

fig. 9 is a partial structure schematic view of two adjacent slots in phase in the first embodiment of the present invention;

fig. 10 is a planar development view of a stator winding of one phase according to the second embodiment of the present invention;

fig. 11 is a partial schematic structural view of two in-phase adjacent grooves in the fourth embodiment of the present invention;

fig. 12 is a planar development view of a stator winding of one phase in the fourth embodiment of the present invention;

fig. 13 is a schematic diagram of an electrical connection in an embodiment of the invention;

fig. 14 is another electrical connection schematic in an embodiment of the invention;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not intended to limit a specific order. The embodiments of the present invention can be implemented individually, and can be implemented by combining each other between the embodiments, and the embodiments of the present invention are not limited to this.

In the figure, the extending direction of A1a2 is parallel to the axial direction of the stator core, 0102 is the direction of extending along the radial direction of the stator core, and the pitch in the application is the interval between the inside of the groove corresponding to the welding end of one U-shaped conductor and the inside of the groove corresponding to the welding end of another U-shaped conductor along the circumferential direction, or the interval between the inside of two grooves of one U-shaped conductor along the circumferential direction; in the application, a plurality of connecting parts of the connecting region part are sequentially and adjacently arranged along the radial direction of the stator core, and the radial direction of the stator core is the same radial direction or is close to the same radial direction; it should be noted that the first layer is located in the radial direction of the stator core (i.e. the first layer in the direction close to the central axis of the stator core), and the mth layer is located in the radial direction of the stator core (i.e. the mth layer in the direction close to the central axis of the stator core); correspondingly, the first layer in the radial direction of the stator core (the first layer in the direction away from the central axis of the stator core is also possible) is positioned, and the Mth layer in the radial direction of the stator core (namely, the Mth layer in the direction away from the central axis of the stator core is positioned).

As shown in fig. 1, an embodiment of the present invention provides a motor stator, including: a stator core 20 having a plurality of slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

as shown in fig. 1 to 12, the stator winding 10 includes a plurality of phase windings mounted on a stator core 20 so as to be different from each other in electrical phase, wherein two branch windings of each phase winding are connected in parallel in turn in the circumferential direction of the stator core.

Referring to fig. 1 to 2, in the first embodiment, the stator winding 10 is mounted on the stator core 20, that is, a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, wherein the stator winding 10 is a three-phase (i.e., U-phase, V-phase, W-phase) winding, and the number Q of slots per phase per pole is 2 or more; two slots 21 are provided for each pole of the rotor, the number Q of slots per pole per phase is 2 in the present embodiment, the rotor has a number of poles of 12 (P is 12 in the first embodiment) and this is true for each phase of the three-phase stator winding 10, the number of slots 21 provided in the stator core 20 is equal to 72 (i.e., 2X12X3), as shown in fig. 10, the number of poles in the stator winding is 8 in the second embodiment (P is 8 in the second embodiment), and accordingly the number of slots 21 provided in the stator core 20 is equal to 48; the U1 branch windings and the U2 branch windings in the U-phase windings are sequentially connected in parallel along the circumferential direction of the stator core respectively, the V1 branch windings and the V2 branch windings in the V-phase windings are sequentially connected in parallel along the circumferential direction of the stator core respectively, and the W1 branch windings and the W2 branch windings in the W-phase windings are sequentially connected in parallel along the circumferential direction of the stator core respectively; as shown in fig. 12, in the fourth embodiment, the stator winding 10 is a three-phase (i.e., U-phase, V-phase, W-phase) winding, and the number Q of slots per phase per pole is 3, the rotor has 8 poles and the number of slots per phase of the three-phase stator winding 10 is equal to 72 (i.e., 3X8X3), the U1 branch winding and the U2 branch winding in the U-phase winding are sequentially connected in parallel in the circumferential direction of the stator core, the V1 branch winding and the V2 branch winding in the V-phase winding are sequentially connected in parallel in the circumferential direction of the stator core, and the W1 branch winding and the W2 branch winding in the W-phase winding are sequentially connected in parallel in the circumferential direction of the stator core; further, in the present embodiment, the stator core 20 is formed by stacking a plurality of annular magnetic steel plates to form the stator core axial direction both end faces 25, 26 of the stator core 20 by defining one tooth portion 22 by two adjacent slots 21, and other conventional metal plates may be used instead of the magnetic steel plates; as shown in fig. 1, 4, 5, 6, and 7, a plurality of insulating papers 30 are inserted into the magnetic steel plate slots 21, fig. 4 shows that the first type of in-slot insulating paper 30 in this embodiment is B-shaped insulating paper, fig. 5 shows that the second type of in-slot insulating paper 30 in this embodiment is double-mouth-shaped insulating paper, fig. 6 shows that the third type of in-slot insulating paper 30 in this embodiment is large S-shaped insulating paper, in this embodiment, any one of the three types of in-slot insulating paper can be selected to isolate the inter-phase conductors in the slots 21, and fig. 7 shows that the fourth type of in-slot insulating paper 30 in this embodiment is single large-mouth-shaped paper, when the conductor insulation is selected to be thicker, the isolation is not required in the middle, and the fourth type of in-slot insulating paper 30 can be used.

Referring to fig. 10, in the embodiment, the stator winding 10 includes 48 connection region portions 110(120), (in the first embodiment, the stator winding 10 includes 72 connection region portions 110(120)), so that it can be seen that the number of the connection region portions is related to the number of slots per phase, the number of poles, and the number of phases per pole, and in the present embodiment, the connection region portions include: the 4 first connecting portions 210 (or the 3 second connecting portions 220) are sequentially located at the stator core slot outer end 26 along the radial direction of the stator core 20, and each U-shaped conductor 200A (200B) includes: the two slot interiors 301 are positioned in two slots of the stator core at a specified slot pitch, one end 25 outside the stator core slot is connected with the plug wire ends of the two slot interiors 301, the other end 26 outside the stator core slot is connected with two welding ends 303, and each first connecting part 210(220) is formed by connecting one welding end 303 of a first U-shaped conductor 200A with one welding end 303 of a second U-shaped conductor 200B;

with reference to fig. 2 and 10, in the present embodiment, 48 (72) connection region portions in the stator winding include: 36 (60) first connection region parts 110, where the first connection region parts 110 include 4 first connection parts 210-1 (located at the eighth and seventh radial layers of the stator core), 210-2 (located at the sixth and fifth radial layers of the stator core), 210-3 (located at the fourth and third radial layers of the stator core), and 210-4 (located at the second and first radial layers of the stator core) sequentially from the radial outer side of the stator core to the radial inner side of the stator core, and the pitches between the two welding ends corresponding to the 4 first connection parts 210 of the first connection region parts 110 are the same and are the same pitch;

specifically, referring to fig. 1 to 10, two slot interiors 301 corresponding to the first connection portion 210-1 of any one of the first connection region portions 110 and connecting the two welding terminals 303 are located at the 14 th slot of the seventh layer of the stator core and the 8 th slot of the eighth layer of the stator core, two slot interiors 301 corresponding to the second first connection portion 210-2 and connecting the two welding terminals 303 are located at the 14 th slot of the fifth layer of the stator core and the 8 th slot of the sixth layer of the stator core, two slot interiors 301 corresponding to the third first connection portion 210-3 and connecting the two welding terminals 303 are located at the 14 th slot of the third layer of the stator core and the 8 th slot of the fourth layer of the stator core, two slot interiors 301 corresponding to the fourth first connection portion 210-4 and connecting the two welding terminals 303 are located at the 14 th slot of the first layer of the stator core and the 8 th slot of the second layer of the stator core, and thus, the pitches between the two groove interiors 301 connected by the two welding ends 303 correspondingly connected by the 4 connecting parts of the first connecting area part 110 are the same and are all integral pitches; as shown in fig. 10, the positions of the 4 first connection portions 210 of the remaining 35 first connection region portions 110 are the same as the pitch of the two groove interiors 301 corresponding to the 4 connection portions of the first connection region portion 110 and connecting the two welding ends 303, which is not described herein again; it should be noted that the number of the connection portions in each connection region portion in this embodiment is related to the number of the inside of the slots that can be accommodated by the stator winding in the radial direction of the stator core, and the number of the inside of the slots that can be accommodated by the stator winding in the radial direction of the stator core in this embodiment is 8 layers (M is 8 in this embodiment).

With reference to fig. 1 to 10, in the first and second embodiments, 48 (72) connection region portions in the stator winding include: 12 second connection region parts 120, the second connection region parts 120 including 3 second connection parts 220-1, 220-2, 220-3 in sequence along the radial outer side of the stator core to the radial inner side of the stator core, and the pitch between two welding ends (located at the seventh layer and the sixth layer in the radial direction of the stator core) corresponding to the first second connection part 220-1 in the 3 second connection parts 220 of the second connection region parts 120 is a full pitch, the pitch between two welding ends (located at the fifth layer and the fourth layer in the radial direction of the stator core) corresponding to the second connection part 220-2 is a long pitch, the pitch between two welding ends (located at the third layer and the second layer in the radial direction of the stator core) corresponding to the third second connection part 220-3 is a full pitch, at this time, the pitch between two welding ends corresponding to one second connection part 220-2 in the second connection region part is a long pitch, the pitch between the two welding ends corresponding to the rest of the connection parts in the second connection region is a full pitch (in the embodiment, the full pitch is 6); of course, the connection portion of the second connection region where the pitch of one corresponding welding end is long may be located at two welding ends (located at the seventh and sixth radial layers of the stator core) corresponding to the first second connection portion 220-1, the pitch of two welding ends (located at the fifth and fourth radial layers of the stator core) corresponding to the remaining second connection portions 220-2 is a full pitch, and the pitch of two welding ends (located at the third and second radial layers of the stator core) corresponding to the third second connection portion 220-3 is a full pitch; of course, the connection portion in which the pitch of one corresponding two welding terminals in the second connection region is long may be located at the third second connection portion 220-3 (located at the third layer and the second layer in the radial direction of the stator core), and the two welding terminals corresponding to the remaining second connection portions 220 in the second connection region are at the full pitch.

Specifically, referring to fig. 1 to 10, two slot interiors 301 connected to two welding terminals 303 correspondingly connected to the first second connecting portion 220-1 of any one of the second connecting region portions 120 are located in the 2 nd slot of the seventh layer of the stator core and the 44 th slot of the sixth layer of the stator core, two slot interiors 301 connected to two welding terminals 303 correspondingly connected to the second connecting portion 220-2 are located in the 2 nd slot of the fifth layer of the stator core and the 43 th slot of the fourth layer of the stator core, two slot interiors 301 connected to two welding terminals 303 correspondingly connected to the third second connecting portion 220-3 are located in the 2 nd slot of the third layer of the stator core and the 44 th slot of the second layer of the stator core, and it can be seen that, of pitches between two welding terminals corresponding to 3 second connecting portions 220 of the second connecting region portion 120, the first second connecting portion 220-1, the third second connecting portion 220-3 and the second connecting region portion 110 are located in the pitch between two welding terminals corresponding to 4 first connecting portions 210 of the first connecting region portion 110 Similarly, the pitch between the two welding terminals corresponding to the second connecting portion 220-2 of the second connecting region portion 120 is different from the pitch between the two welding terminals corresponding to the 4 first connecting portions 210 of the first connecting region portion 110, and the number of the second connecting region portions in the 48 (72) connecting region portions is 12, that is, the number Q of slots per phase per pole is 2, the number of poles in each phase winding is 2, the stator winding is three-phase, it should be noted that the 12 connecting region portions may be located at circumferentially adjacent positions of the stator core, or may be separately located.

Referring to fig. 8, in the present embodiment, the stator winding includes 48 connection region portions (or 72 connection region portions), the pitch between the inside of the slots corresponding to one half of the plug terminals in the plurality of plug terminals is long pitch 7, and the pitch between the inside of the slots corresponding to the other half of the plug terminals is short pitch 5, that is, the stator winding includes U-shaped conductors 200A having long pitch between the inside of the slots corresponding to the plurality of plug terminals, and the stator winding includes U-shaped conductors 200B having short pitch between the inside of the slots corresponding to the plurality of plug terminals, and each of the U-shaped conductors 200A having long pitch surrounds each of the U-shaped conductors 200B having short pitch, and two conductors are located in two adjacent stator slots.

When M is 8, the pitch of the inner part of the slot corresponding to 4 plug terminals in 24 connection areas in 48 connection areas of the stator winding is a long pitch, and the pitch of the inner part of the slot corresponding to 4 plug terminals in the remaining 24 connection areas is a short pitch; the winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of circulating current generated by an asymmetrical structure, adopts fewer U-shaped conductors, simplifies the manufacturing process, reduces the height of a welding end, reduces the production cost and improves the processing efficiency.

As shown in fig. 10, in the second embodiment, the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductor 200B corresponding to each connection portion of the first branch winding of the two branch windings of the phase winding (U-phase as an example) of the stator winding 10 is a short pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductor 200A corresponding to the connection portion is a long pitch; as shown in fig. 10, in any branch, the first U-shaped conductor 200A corresponding to the first connection portion 210-1 in the first connection region portion 110 of the seventh and eighth layers in the radial direction of the stator core is located in the 21 st and 14 th slots, and the second U-shaped conductor 200B corresponding to the first connection portion 210-1 is located in the 8 th and 3 rd slots; a first U-shaped conductor 200A corresponding to a second first connecting part 210-2 in the first connecting area part 110 of the fifth layer and the sixth layer in the radial direction of the stator core is positioned in the 21 st slot and the 14 th slot, and a second U-shaped conductor 200B corresponding to the second first connecting part 210-2 is positioned in the 8 th slot and the 3 rd slot; the second U-shaped conductor 200B corresponding to the third first connecting part 210-3 in the first connecting area part 110 of the third and fourth layers in the radial direction of the stator core is positioned in the 19 th and 14 th grooves, and the first U-shaped conductor 200A corresponding to the third first connecting part 210-3 is positioned in the 8 th and 1 st grooves; the second U-shaped conductor 200B corresponding to the fourth first connecting part 210-4 in the first connecting area part 110 of the first layer and the second layer in the radial direction of the stator core is positioned in the 19 th slot and the 14 th slot, and the first U-shaped conductor 200A corresponding to the fourth first connecting part 210-4 is positioned in the 8 th slot and the 1 st slot; the second U-shaped conductors 200B corresponding to the first second connecting parts 220-1 in the second connecting region parts 120 of the sixth and seventh layers in the radial direction of the stator core are positioned in the 3 rd slot and the 8 th slot of the seventh layer of the stator core, and the first U-shaped conductors 200A corresponding to the first second connecting parts 220-1 are positioned in the 45 th slot and the 38 th slot of the sixth layer of the stator core and the fifth layer of the stator core; the second U-shaped conductor 200B corresponding to the second connecting part 220-2 in the first connecting region part 120 of the fourth layer and the fifth layer of the stator core is positioned in the fifth layer 3 rd slot and the sixth layer 8 th slot of the stator core, and the first U-shaped conductor 200A corresponding to the second connecting part 220-2 is positioned in the fourth layer 44 th slot and the third layer 37 th slot of the stator core; the second U-shaped conductor 200B corresponding to the third second connecting part 220-3 in the second connecting region part 120 of the second layer and the third layer of the stator core is positioned in the 2 nd slot and the 7 th slot of the third layer and the fourth layer of the stator core, and the first U-shaped conductor 200A corresponding to the third second connecting part 220-3 is positioned in the 44 th slot and the 37 th slot of the second layer and the first layer of the stator core; it can be seen that when Q is equal to 2, the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductor 200B corresponding to each connection portion of each connection region section of each branch winding is a short pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductor 200A corresponding to the connection portion is a long pitch.

As shown in fig. 12, alternatively, in the fourth embodiment, the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductor 200B corresponding to the partial connection portions of the first branch windings of the two branch windings (U-phase as an example) of the phase winding 10 is a short pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductor 200A corresponding to the connection portions is a long pitch; as shown in fig. 12, in any branch, the second U-shaped conductor 200B corresponding to the first connection portion 210-1 located at the seventh and eighth layers in the radial direction of the stator core is located at the 13 th and 20 th slots, and the first U-shaped conductor 200A corresponding to the first connection portion 210-1 is located at the 4 th and 66 th slots; a second U-shaped conductor 200B corresponding to a second first connecting part 210-2 positioned at the fifth layer and the sixth layer in the radial direction of the stator core is positioned in the 13 th slot and the 20 th slot, and a first U-shaped conductor 200A corresponding to the second first connecting part 210-2 is positioned in the 4 th slot and the 66 th slot; a second U-shaped conductor 200B corresponding to a third first connecting part 210-3 positioned on a third layer and a fourth layer in the radial direction of the stator core is positioned in a 12 th slot and a 19 th slot, and a first U-shaped conductor 200A corresponding to the third first connecting part 210-3 is positioned in a 3 rd slot and a 65 th slot; the second U-shaped conductor 200B corresponding to the fourth first connecting part 210-4 in the first connecting area part 110 of the first layer and the second layer in the radial direction of the stator core is positioned in the 12 th slot and the 19 th slot, and the first U-shaped conductor 200A corresponding to the fourth first connecting part 210-4 is positioned in the 3 rd slot and the 65 th slot;

in the branch circuit, the pitches of the in-slot parts corresponding to the plug wire ends of two U-shaped conductors corresponding to another connecting part circumferentially adjacent to the connecting part of each layer are the same, namely, the pitches of the in-slot parts corresponding to another U-shaped conductor of the adjacent slot of the U-shaped conductor corresponding to the connecting part of each layer in the branch circuit are the same, specifically, a first U-shaped conductor 200A corresponding to a first connecting part 210-1 positioned in a seventh layer and an eighth layer in the radial direction of the stator core is positioned in a 12 th slot and a 22 th slot, and another first U-shaped conductor 200A corresponding to the first connecting part 210-1 is positioned in a 3 rd slot and a 65 th slot; a first U-shaped conductor 200A corresponding to a second first connecting part 210-2 positioned at the fifth layer and the sixth layer in the radial direction of the stator core is positioned in the 12 th slot and the 21 st slot, and another first U-shaped conductor 200A corresponding to the second first connecting part 210-2 is positioned in the 3 rd slot and the 65 th slot; a first U-shaped conductor 200A corresponding to a third first connecting part 210-3 positioned at a third layer and a fourth layer in the radial direction of the stator core is positioned in a 11 th slot and a 21 st slot, and another first U-shaped conductor 200A corresponding to the third first connecting part 210-3 is positioned in a2 nd slot and a 64 th slot; a first U-shaped conductor 200A corresponding to a fourth first connecting part 210-4 in the first connecting area part 110 of the first layer and the second layer in the radial direction of the stator core is positioned in the 11 th slot and the 21 st slot, and another first U-shaped conductor 200A corresponding to the fourth first connecting part 210-4 is positioned in the 2 nd slot and the 64 th slot; it can be seen that, the pitch between the inside of the corresponding slot of the plug wire end of the first U-shaped conductor 200A corresponding to each connection portion of each connection region portion of each branch winding is a long pitch, and the pitch between the inside of the corresponding slot of the plug wire end of the other first U-shaped conductor 200A corresponding to the connection portion is a long pitch;

further, the second U-shaped conductor 200B corresponding to the first second connecting portion 220-1 in the second connecting region 120 of the sixth and seventh layers in the radial direction of the stator core is located in the 4 th slot of the seventh layer and the 11 th slot of the eighth layer of the stator core, and the first U-shaped conductor 200A corresponding to the first second connecting portion 220-1 is located in the 67 th slot of the sixth layer and the 57 th slot of the fifth layer of the stator core; the second U-shaped conductor 200B corresponding to the second connecting part 220-2 in the first connecting region part 120 of the fourth layer and the fifth layer of the stator core is positioned in the fifth 4 th groove and the sixth 11 th groove of the stator core, and the first U-shaped conductor 200A corresponding to the second connecting part 220-2 is positioned in the fourth 66 th groove and the third 56 th groove of the stator core; the second U-shaped conductor 200B corresponding to the third second connecting part 220-3 in the second connecting region part 120 of the second layer and the third layer of the stator core is positioned in the 32 th slot and the 10 th slot of the third layer of the stator core, and the first U-shaped conductor 200A corresponding to the third second connecting part 220-3 is positioned in the 66 th slot and the 56 th slot of the first layer of the stator core; it can be seen that, the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductor 200B corresponding to each connection portion of each connection region portion of each branch winding is a short pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductor 200A corresponding to the connection portion is a long pitch; in the branch circuit, the pitches of the in-slot components corresponding to the plug wire ends of two U-shaped conductors corresponding to another connecting part circumferentially adjacent to the connecting part of each layer are the same, that is, the pitches of the in-slot components corresponding to another U-shaped conductor of the adjacent slot of the U-shaped conductor corresponding to the connecting part of each layer in the branch circuit are the same, specifically, a first U-shaped conductor 200A corresponding to a first second connecting part 220-1 in a second connecting region part 120 located at a sixth layer and a seventh layer in the radial direction of the stator core is located at a seventh layer 3 slot and an eighth layer 13 slot of the stator core, and another first U-shaped conductor 200A corresponding to the first second connecting part 220-1 is located at a sixth layer 66 slot and a fifth layer 56 slot of the stator core; the first U-shaped conductor 200A corresponding to the second connecting part 220-2 in the first connecting region part 120 of the fourth layer and the fifth layer of the stator core is positioned in the fifth layer 3 rd slot and the sixth layer 13 th slot of the stator core, and the other first U-shaped conductor 200A corresponding to the second connecting part 220-2 is positioned in the fourth layer 65 th slot and the third layer 55 th slot of the stator core; the first U-shaped conductor 200A corresponding to the third second connecting part 220-3 in the first connecting region part 120 of the second layer and the third layer of the stator core is positioned in the 2 nd slot and the 12 th slot of the third layer of the stator core, and the other first U-shaped conductor 200A corresponding to the third second connecting part 220-3 is positioned in the 65 th slot and the 55 th slot of the second layer and the 55 th slot of the first layer of the stator core; it can be seen that, the pitch between the inside of the corresponding slot of the plug wire end of the first U-shaped conductor 200A corresponding to each connection portion of each connection region portion of each branch winding is a long pitch, and the pitch between the inside of the corresponding slot of the plug wire end of the other first U-shaped conductor 200A corresponding to the connection portion is a long pitch; therefore, when Q is equal to 3, the pitch between the inside of the slots corresponding to the plug ends of the second U-shaped conductors corresponding to the two-thirds connection portions of each branch winding is a short pitch, the pitch between the inside of the slots corresponding to the plug ends of the first U-shaped conductors corresponding to the connection portions is a long pitch, the pitch between the inside of the slots corresponding to the plug ends of the first U-shaped conductors corresponding to the one-third connection portions of the branch windings is a long pitch, and the pitch between the inside of the slots corresponding to the plug ends of the other first U-shaped conductors corresponding to the connection portions is a long pitch, that is, the pitch between the inside of the slots corresponding to the plug ends of the two U-shaped conductors corresponding to the one-third connection portions of the branch winding is a long pitch or a short pitch;

as shown in fig. 3, in the embodiment, the outgoing lines (incoming line ends and outgoing line ends) of the two branch windings U1 and U2 of the phase winding (U-phase is an example) of the stator winding 10 are located in the 6 second connection region portions 120 of the first (Q1) of the outgoing lines (incoming line ends and outgoing line ends) of the first branch winding U1 of the phase winding U, and the outgoing lines (incoming line ends and outgoing line ends) of the second branch winding U2 of the phase winding U are located in the 6 second connection region portions 120 of the second (Q2), the number of slots per phase per pole is 2 in the first embodiment and the second embodiment, that is, Q is 2; as shown in fig. 12, in the fourth embodiment, the lead wires (inlet and outlet ends) of the two branch windings U1 and U2 of the phase winding (U-phase is taken as an example) of the stator winding 10 are located in the 9 second connection region portions 120 of the first (Q1) of the lead wires (inlet and outlet ends) of the first branch winding U1 of the phase winding U, and the lead wires (inlet and outlet ends) of the second branch winding U2 of the phase winding U are located in the 9 second connection region portions 120 of the second (Q2), and in the fourth embodiment, the number of slots per pole per phase is 3, that is, Q is 3;

exemplarily, as shown in fig. 10, the first branch winding of the phase winding U in the first embodiment and the second embodiment includes 2 sub-branch windings, two sub-branch windings U1A and U3A of the first branch winding are located on the radial outer side (i.e., the side away from the axial direction) of the stator core and are sequentially connected in series with P/2 pole number coils to the radial inner side (i.e., the side close to the central axial direction) of the stator core along the circumferential direction of the stator core, and P is 12, that is, the U1 sub-branch winding is sequentially connected in series from the radially outermost side (eighth layer) U1A of the stator core along the circumferential direction of the stator core to the tail portion U1B of the radially innermost side (first layer) of the stator core from the q2 pole number coil, the q4 pole number coil, the q6 pole number coil, the q8 pole number coil, the q10 pole number coil, and the q12 pole number coil; the U3 sub-branch winding is also formed by sequentially connecting the U-shaped conductors 200A (200B) of a q2 pole number coil, a q4 pole number coil, a q6 pole number coil, a q8 pole number coil, a q10 pole number coil and a q12 pole number coil in series from the radially outermost side (eighth layer) U3A of the stator core to the radially innermost side (first layer) tail U3B of the stator core along the circumferential direction of the stator core; the first sub-branch winding is positioned in 6 second connection region parts of q1, the tail part U1B of the first sub-branch winding, which is positioned on the first radial layer of the stator core, is radially connected with the head part U3A of the second sub-branch winding, which is positioned on the eighth radial layer of the stator core, and the tail part U3B of the second sub-branch winding, which is positioned on the first radial layer of the stator core, radially extends to the outermost side (eighth layer) of the stator core to be connected in an alternate mode;

as shown in fig. 3, in the first embodiment and the second embodiment, the second branch winding of the phase winding U includes 2 sub-branch windings, where U2A and U4A of the two sub-branch windings of the second branch winding are located on the radially inner side (i.e., the side close to the axial direction) of the stator core and are sequentially connected in series with P/2-pole coils to the radially outer side (i.e., the side away from the central axial direction) of the stator core along the circumferential direction of the stator core, and P is 12, that is, the U2 sub-branch winding is sequentially connected in series from the radially innermost side (first layer) U2A of the stator core along the circumferential direction of the stator core and is located in series from the U-shaped conductor 200A (200B) of the q 1-pole coil, the q 11-pole coil, the q 9-pole coil, the q 7-pole coil, the q 5-pole coil, and the q 3-pole coil to the; the U4 sub-branch winding is also serially connected from the radially innermost side (the first layer) of the stator core to the tail U4B of the radially outermost side (the eighth layer) of the stator core from the U-shaped conductor 200A (200B) of a q 1-pole coil, a q 11-pole coil, a q 9-pole coil, a q 7-pole coil, a q 5-pole coil and a q 3-pole coil in the circumferential direction of the stator core; the first sub-branch winding is located in 6 second connection region parts of q2, the head part U4A of the second sub-branch winding located in a first radial layer of the stator core is radially connected with the tail part U2B of the first sub-branch winding located in an eighth radial layer of the stator core, the second sub-branch winding located in the tail part U4B of the eighth radial layer of the stator core is connected in an interphase mode, namely 2 sub-branch windings of the second sub-branch winding are located in 6 second connection region parts of q2 and are connected in series in the radial direction of the stator core; that is, the P/2 pole number coils of the plurality of sub-branch windings of the first branch winding of the phase which are sequentially connected in series along the circumferential direction of the stator core are different from the P/2 pole number coils of the plurality of sub-branch windings of the second branch winding of the phase which are sequentially connected in series along the circumferential direction of the stator core;

in the first embodiment, N is 2, and Q is 2, in the second embodiment, N is 2, and U1 and U3 sub branch windings in two sub branch windings of a first branch winding in the U-phase winding are located in 2 circumferentially adjacent slots of the stator core, and U2 and U4 sub branch windings in two sub branch windings of a second branch winding are located in 2 circumferentially adjacent slots of the stator core;

as shown in fig. 12, in the fourth embodiment, the first branch winding of the phase winding U includes 3 sub-branch windings, the sub-branch windings U1A, U3A, and U5A are located on the radially outer side of the stator core (i.e., on the side away from the central axis direction) and are sequentially connected in series with P/2-pole coils to the radially inner side of the stator core (i.e., on the side close to the central axis direction) along the circumferential direction of the stator core, and P is 8, that is, the first sub-branch winding is sequentially connected in series from the radially outermost (eighth layer) U1A of the stator core to the circumferentially innermost (first layer) tail U1B of the stator core, where the U-shaped conductors 200A (200B) of the q 2-pole coil, the q 4-pole coil, the q 6-pole coil, and the q 8-pole coil; the second sub-branch winding is also formed by sequentially connecting U-shaped conductors 200A (200B) of a coil with the number of q2 poles, a coil with the number of q4 poles, a coil with the number of q6 poles and a coil with the number of q8 poles in series from the radially outermost side (eighth layer) U5A of the stator core to the tail U5B of the radially innermost side (first layer) of the stator core along the circumferential direction of the stator core; the third sub-branch winding is also formed by sequentially connecting U-shaped conductors 200A (200B) of a coil with the number of q2 poles, a coil with the number of q4 poles, a coil with the number of q6 poles and a coil with the number of q8 poles in series from the radially outermost side (eighth layer) U3A of the stator core to the tail part U3B of the radially innermost side (first layer) of the stator core along the circumferential direction of the stator core; the first sub-branch winding is located in 6 second connection area portions of q1, the tail portion U1B of the first sub-branch winding located on the first radial layer of the stator core is radially connected with the head portion U5A of the second sub-branch winding located on the eighth radial layer of the stator core, the second sub-branch winding is located in 6 second connection area portions of q1, the tail portion U5B of the second sub-branch winding located on the first radial layer of the stator core is radially connected with the head portion U3A of the third sub-branch winding located on the eighth radial layer of the stator core, the third sub-branch winding is located in 6 second connection area portions of q1, and the tail portion U3B of the third sub-branch winding located on the first radial layer of the stator core radially extends to the outermost side (eighth layer) of the stator core to be connected in an interphase mode;

as shown in fig. 12, in the fourth embodiment, the second branch winding of the phase winding U includes 3 sub-branch windings, the sub-branch windings U2A, U4A and U6A are located on the radially inner side (i.e., the side close to the axial direction) of the stator core and are sequentially connected in series with P/2-pole coils to the radially outer side (i.e., the side away from the central axial direction) of the stator core along the circumferential direction of the stator core, and P is 8, that is, the first sub-branch winding is sequentially connected in series from the radially innermost side (the first layer) of the stator core along the circumferential direction of the stator core and is located from the U-shaped conductor 200A (200B) of the q 1-pole coil, the q 7-pole coil, the q 5-pole coil and the q 3-pole coil to the tail U2B of the radially; the second sub-branch winding is also sequentially connected in series from the radially innermost side (the first layer) of the stator core to the tail U6B of the radially outermost side (the eighth layer) of the stator core from the U-shaped conductor 200A (200B) of the q 1-pole coil, the q 7-pole coil, the q 5-pole coil and the q 3-pole coil in the circumferential direction of the stator core; the third sub-branch winding is also connected with a U-shaped conductor 200A (200B) of a coil with q1 poles, a coil with q7 poles, a coil with q5 poles and a coil with q3 poles in series in turn from the radially innermost side (the first layer) of the stator core to the tail U4B of the radially outermost side (the eighth layer) of the stator core along the circumferential direction of the stator core; the first sub-branch winding is located in 9 second connection region portions of q2, the head portion U6A, located at the first radial layer of the stator core, of the second sub-branch winding is radially connected with the head portion U2B, located at the eighth radial layer of the stator core, of the first sub-branch winding, the third sub-branch winding is located in 9 second connection region portions of q1, the head portion U4A, located at the first radial layer of the stator core, of the third sub-branch winding is radially connected with the tail portion U6B, located at the eighth radial layer of the stator core, of the second sub-branch winding, the third sub-branch winding is located in 9 second connection region portions of q1, and the third sub-branch winding is located at the tail portion U4B, located at the eighth radial layer of the stator core, of the stator core and is connected in an; namely, 3 sub-branch windings of the second branch winding are positioned in 9 second connection area parts of q2 and are connected in series along the radial direction of the stator core; that is, the P/2 pole number coils of the plurality of sub-branch windings of the first branch winding of the phase which are sequentially connected in series along the circumferential direction of the stator core are different from the P/2 pole number coils of the plurality of sub-branch windings of the second branch winding of the phase which are sequentially connected in series along the circumferential direction of the stator core.

In example four N is 3 and Q is 3; the U1, U5 and U3 sub-branch windings in three sub-branch windings of the U1 branch winding in the U-phase winding are positioned in 3 circumferentially adjacent slots of the stator core, and the U2, U6 and U4 sub-branch windings in three sub-branch windings of the second branch winding are positioned in 3 circumferentially adjacent slots of the stator core;

further, the lead wires (including lead terminals and lead terminals) of the two branch windings U1 and U2 in each phase winding of the stator winding may be located on the radially innermost side (first layer) of the second connection region portion 120, or may be located on the radially outermost side (eighth layer) of the second connection region portion 120.

In the third embodiment, the number of stator windings in the slots that can be accommodated in the radial direction of the stator core is 4 (M is 4 in the present embodiment), and 48 (72) connection region portions in the stator windings include: 36 (60) first connection area parts 110, where the first connection area part 110 includes 2 first connection parts 210-1 (located at a first layer and a second layer in the radial direction of the stator core), a first connection part 210-2 (located at a third layer and a fourth layer in the radial direction of the stator core), and two welding ends that sequentially face the radial inner side of the stator core along the radial outer side of the stator core and correspond to the 2 connection parts of the first connection area part 110 have the same pitch, which is a whole pitch; the 48 connection region portions in the stator winding include: 12 second connection region parts 120, the second connection region parts 120 including 1 second connection part 220-1 (located at the second layer and the third layer in the radial direction of the stator core), the pitch between the two welding terminals corresponding to the first second connection part 220-1 being a long pitch, whereby it can be seen that the pitch between the two welding terminals corresponding to the second connection part 220 of the second connection region parts is different from the pitch between the two welding terminals corresponding to the 2 first connection parts 210 of the first connection region parts; that is, the pitch between the two welding terminals corresponding to 1 connection portion of the second connection region portion 120 is different from the pitch between the two welding terminals corresponding to 2 connection portions of the first connection region portion 110, and the number of the second connection region portions in 48 (72) connection region portions is 12, that is, the number Q of slots per phase per pole is 2, the number of poles in the phase winding is 2, and the stator winding is 3 phases.

Alternatively, with reference to fig. 1, 2 and 10, in the first and second embodiments of the present invention, the extending directions of the welding end of the first connecting region portion 110 located at the second layer in the radial direction of the stator core and the welding end of the second connecting region portion 120 in the 48 connecting region portions (or 72 connecting region portions) are all extended rightward, and the slot pitches are all 3 slot pitches, the extending directions of the welding end of the first connecting region portion 110 located at the third layer in the radial direction of the stator core and the welding end of the second connecting region portion 120 are all extended leftward, and the slot pitches are all 3 slot pitches, the extending directions of the welding end of the first connecting region portion 110 located at the fourth layer in the radial direction of the stator core and the welding end of the second connecting region portion 120 are all extended rightward, and the slot pitches are all 3 slot pitches, the extending directions of the welding end of the first connecting region portion 110 located at the fifth layer in the radial direction of the stator core and the welding end of the second connecting region portion 120 are all extended leftward, and the groove pitch of the welding end of the first connection area part 110 is 3, the groove pitch of the welding end of the second connection area part 120 is 4, the welding end of the first connection area part 110 positioned at the sixth layer in the radial direction of the stator core and the welding end of the second connection area part 120 extend rightwards in the same direction, and the groove pitches are 3, the welding end of the first connection area part 110 positioned at the seventh layer in the radial direction of the stator core and the welding end of the second connection area part 120 extend leftwards in the same direction, and the groove pitches are 3, so that the welding ends of the first connection area part positioned at the second layer, the third layer, the fourth layer, the sixth layer and the seventh layer in the radial direction of the stator core and the welding ends of the second connection area part in the radial direction of the stator core have the same direction and the same groove pitch, and the welding ends of the first connection area part positioned at the fifth layer in the radial direction of the stator core and the welding ends of the second connection area part in the radial direction of the stator core and the groove pitch are the same, that is, the extending directions of the welding ends of the first connecting area part and the second connecting area part of the 48 connecting area parts which are positioned on the same layer in the radial direction of the stator core are the same, and the extending directions of the welding ends of the first connecting area part of the fifth layer in the radial direction of the stator core and the second connecting area part of the layer are the same, and the slot pitches are different.

Illustratively, as shown in fig. 13, U-phase conductor lead terminals include U-phase terminals U1 and U2, V-phase terminals V1 and V2 are provided at the V-phase conductor lead terminals, W-phase terminals W1 and W2 are provided at the W-phase conductor lead terminals, U3, U4, V-phase conductor lead terminals V3 and V4 are provided at the W-phase conductor lead terminals W3 and W4, and a neutral point connection is performed, i.e., a star connection for parallel connection of 2-phase windings of the electric machine is completed, as shown in fig. 14, U-phase conductor lead terminals U1 and U2 are connected to W-phase conductor lead terminals W3 and W4, W-phase conductor lead terminals W1 and W2 are connected to V-phase conductor lead terminals V3 and V4, V-phase conductor lead terminals V1 and V2 are connected to U3 and U4, i.e., a delta connection for parallel connection of 2-phase windings of the electric machine.

The embodiment also provides a motor, which comprises the motor stator, and the motor adopting the motor stator can reduce the production cost and improve the production efficiency.

The utility model discloses in every utmost point every looks slot number the stator slot number/motor pole number/looks number, the pole distance the stator slot number/motor pole number every utmost point every looks slot number the looks number, the quantity in groove is not limited only 48 grooves, can also be the groove of other quantity, for example: the number of slots per phase per pole is not limited to 2, 3, etc., and is not limited thereto.

The embodiment of the utility model provides a motor includes the motor stator in above-mentioned embodiment, consequently the embodiment of the utility model provides a motor also possesses the beneficial effect that the above-mentioned embodiment described, no longer gives unnecessary details here.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; the connection may be mechanical or electrical, may be direct, may be indirect via an intermediate medium (bus connection), or may be communication between the two components. The above-described meaning of what is specifically intended in the present invention can be understood in specific instances by those of ordinary skill in the art. Finally, it should be noted that the above description is only a preferred embodiment of the present invention and the technical principles applied.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (11)

1. An electric machine stator comprising:

a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

a stator winding including a plurality of phase windings mounted on the stator core so as to be different in electrical phase from each other;

the stator winding is three-phase, the number of slots of each phase of each pole is Q, the phase winding is provided with P poles, and two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core;

the stator winding includes: the multiple plug terminals are positioned outside the stator core slot, the other ends of the multiple plug terminals are connected with the insides of two slots of the same U-shaped conductor, the pitch between the insides of the slots corresponding to one part of the plug terminals in the multiple plug terminals is long pitch, and the pitch between the insides of the slots corresponding to the other part of the plug terminals in the multiple plug terminals is short pitch;

the stator winding further includes: each connecting area part is provided with a plurality of connecting parts which are sequentially positioned at one end outside the stator core slot along the radial direction of the stator core, and each connecting part is formed by connecting one welding end of a first U-shaped conductor with one welding end of a second U-shaped conductor;

the 3 × Q × P connection region portions include:

a first connection region portion having a same pitch between two soldering terminals corresponding to a plurality of first connection portions,

and the pitch between two welding ends corresponding to the plurality of second connecting parts of the second connecting region part is at least partially different from the pitch between two welding ends corresponding to the plurality of first connecting parts of the first connecting region part, and the number of the second connecting region parts is 2x 3x Q.

2. The stator according to claim 1, wherein when Q is equal to 2, the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductor corresponding to each connection portion of each winding branch is a long pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductor corresponding to the connection portion is a short pitch, and when Q is equal to 3, the pitch between the inside of the slots corresponding to the plug terminals of the first U-shaped conductor corresponding to part of the connection portion of each winding branch is a long pitch, and the pitch between the inside of the slots corresponding to the plug terminals of the second U-shaped conductor corresponding to the connection portion is a short pitch.

3. The electric machine stator according to claim 1, wherein two branch windings of the phase windings of the stator winding have lead-out wires, the lead-out wires of a first branch winding of the phase windings are located in a first 3 × Q of the second connection region portions, and the lead-out wires of a second branch winding of the phase winding are located in a second 3 × Q of the second connection region portions.

4. The stator according to claim 3, wherein each branch winding of the phase winding includes N sub-branch windings, each sub-branch winding is located on one radial side of the stator core and sequentially connected in series with P/2 poles to the other radial side of the stator core along a circumferential direction of the stator core, the N sub-branch windings are located in 3 × Q second connection region portions and connected in series along the radial direction of the stator core, and N and Q are the same.

5. The electric machine stator of claim 4, wherein the N sub-branch windings of each of the phase windings are located in Q circumferentially adjacent slots of the stator core.

6. A motor stator according to claim 3, wherein the lead-out wires of the two branch windings of the phase winding are located radially innermost or radially outermost of the second connection region portion.

7. The stator according to claim 1, wherein the number of conductors in slots that can be received by the stator winding in the radial direction of the stator core divides each slot into M layers, M is an even number equal to or greater than 4, and a pitch between two welding terminals corresponding to the plurality of first connection portions of the first connection region portion is a full pitch.

8. The stator according to claim 7, wherein when M is equal to 4, a pitch between two welding terminals corresponding to the second connection portion of the second connection region portion is a long pitch.

9. The stator of claim 7, wherein when M is greater than 4, the pitch between the two welding ends corresponding to only one second connecting portion in the second connecting region is a long pitch, and the second connecting portion can be located at any position in the radial direction of the second connecting region; the pitch between the two welding ends corresponding to the rest second connecting parts in the second connecting area is a whole pitch.

10. The stator according to claim 1, wherein the 3 × Q × P connection regions have the same extending direction of the welding end of the first connection region and the welding end of the second connection region located in the same radial layer of the stator core, and the pitch of the slots of the welding end of the second connection region located in the same radial layer of the stator core is different from the pitch of the welding end of the first connection region.

11. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 10.

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