CN212183201U - 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; utility model has adopted complete symmetrical structure through the winding structure on magnetic circuit, has eliminated because the circulation current problem that asymmetrical structure produced, adopts less U-shaped conductor, simplifies manufacturing procedure, 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, 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 at least 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 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 3 × Q × 2;

and among the 3Q P connecting region parts, the extending direction of the welding end of the first connecting region part and the extending direction of the welding end of the second connecting region part which are positioned on the same layer in the radial direction of the stator core are the same, and the groove distances are the same.

Furthermore, the pitch between the inside of the slots corresponding to the plug wire end of the first U-shaped conductor corresponding to each connection portion of each branch winding is a long pitch, and the pitch between the inside of the slots corresponding to the plug wire end of the second U-shaped conductor corresponding to the connection portion is a short pitch.

Further, each branch winding of the phase winding has an outgoing line located at a radially innermost side and/or a radially outermost side of the second connection region portion.

Furthermore, when two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core, the outgoing lines of the first branch winding of the phase winding are positioned in the first 3 × Q second connection region parts, and the outgoing lines of the second branch winding of the phase winding are positioned in the second 3 × Q second connection region parts.

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 3 x 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.

Furthermore, each slot is divided into M layers by the stator winding according to 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 connecting parts of the first connecting area part is a whole pitch.

Further, when M is greater than or equal to 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.

Further, the pitch between the two welding terminals 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 first six layers on one radial side of the second connecting region portion, and the pitch between the two welding terminals corresponding to the remaining second connecting portions in the second connecting region portion is a full pitch.

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

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; wherein, stator winding is the three-phase, and every looks slot number of every utmost point is Q, and phase winding has P number of poles, and at least two branch circuit windings are connected in parallel along stator core circumference in proper order in each phase winding, and 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 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 3 × Q × 2; and among the 3Q P connecting region parts, the extending direction of the welding end of the first connecting region part and the extending direction of the welding end of the second connecting region part which are positioned on the same layer in the radial direction of the stator core are the same, and the groove distances are the same. 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 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 is a schematic structural diagram of a U-shaped conductor set in an 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 schematic structural view of a motor stator in the third embodiment of the present invention;

fig. 12 is a schematic structural view of an axial side of a stator winding in the third embodiment of the present invention;

fig. 13 is a planar development view of a stator winding of one phase in the fourth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a motor stator in the fifth embodiment of the present invention;

fig. 15 is a schematic structural view of an axial side of a stator winding according to a fifth embodiment of the present invention;

fig. 16 is a planar development view of a phase stator winding in a sixth embodiment of the present invention;

fig. 17 is a schematic structural view of an axial side of a stator winding in the seventh embodiment of the present invention;

fig. 18 is a schematic structural view of a motor stator according to an eighth embodiment of the present invention;

fig. 19 is a schematic diagram of an electrical connection in an embodiment of the invention;

fig. 20 is another electrical connection schematic in an embodiment of the invention;

fig. 21 is a schematic diagram of yet another electrical connection 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.

The extending direction of A1A2 is parallel to the axial direction of the stator core, and the pitch is the interval between the groove inner part corresponding to the welding end of one U-shaped conductor and the groove inner part corresponding to the welding end of the other U-shaped conductor along the circumferential direction, or the interval between the two groove inner parts 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 2, 11 to 12, 14 to 15, and 17 to 18, 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 at least two branch windings of each phase winding are connected in parallel in sequence in the circumferential direction of the stator core.

With reference to fig. 1 to 18, in the first embodiment, the third embodiment, the fifth embodiment, the seventh embodiment and the eighth 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 and W-phase) winding, and the number Q of slots per phase per pole is equal to or greater than 2; each pole of the rotor is provided with two slots 21, the number Q of slots per phase per pole being 2 in this embodiment, the rotor has 12 (P is 12 in the first embodiment) poles 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 figures 10, 13, 16, in the second embodiment, the fourth embodiment and the sixth embodiment, the number of poles in the stator winding is 8 (P is 8 in the second embodiment, the fourth embodiment and the sixth embodiment), the number of the corresponding slots 21 arranged in the stator core 20 is equal to 48, the U1 branch windings and the U2 branch windings in the U-phase winding 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 winding 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 are sequentially connected in parallel along the circumferential direction of the stator core respectively; 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, any one of the three types of in-slot insulating paper can be selected in this embodiment to isolate the inter-phase conductors in the slots 21, and as fig. 7 shows that the fourth type of in-slot insulating paper 30 in this embodiment is single large-mouth-shaped paper, when conductor insulation is selected to be thicker, isolation is not required in the middle, and the fourth type of in-slot insulating paper 30 can be used.

With reference to fig. 1 to 15, in the second embodiment, the fourth embodiment and the sixth embodiment, the stator winding 10 includes 48 connection area portions 110(120), (in the first embodiment, the third embodiment, the fifth embodiment, the seventh embodiment and the eighth embodiment, the stator winding 10 includes 72 connection area portions 110(120)), so that it can be seen that the number of the connection area portions is related to the number of slots, poles and phases per pole and phase of the motor, and in this embodiment, the connection area 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 inner parts 301 are positioned in two slots of the stator core at a specified slot distance, the other end 25 of the stator core outside the slot is connected with the wire plugging ends of the two slot inner parts 301, the end 26 of the stator core outside the slot is connected with two welding ends 303, and each first connecting part 210 (second connecting part 220) is formed by connecting one welding end 303 of a first U-shaped conductor 200A (200B) with one welding end 303 of a second U-shaped conductor 200B (200A);

with reference to fig. 1 to 15, in the present embodiment, the 48 (72) connection region portions in the stator winding include: 36 (60) first connection region parts 110, wherein 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), 210-4 (located at the second and first radial layers of the stator core) sequentially from the outer radial side of the stator core to the inner radial side of the stator core, and the pitches between the two welding ends corresponding to the 4 connection parts of the first connection region parts 110 are the same and are the same as a whole pitch;

specifically, referring to fig. 1 to 15, the 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 13 th slot of the seventh layer of the stator core and the 7 th slot of the eighth layer of the stator core, the two slot interiors 301 corresponding to the second first connection portion 210-2 and connecting the two welding terminals 303 are located at the 13 th slot of the fifth layer of the stator core and the 7 th slot of the sixth layer of the stator core, the two slot interiors 301 corresponding to the third first connection portion 210-3 and connecting the two welding terminals 303 are located at the 13 th slot of the third layer of the stator core and the 7 th slot of the fourth layer of the stator core, the two slot interiors 301 corresponding to the fourth first connection portion 210-4 and connecting the two welding terminals 303 are located at the 13 th slot of the first layer of the stator core and the 7 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 first connecting parts 210 of the first connecting area part 110 are the same and are all the same as a whole pitch; 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 first connection portions 210 of the first connection region portion 110 and connecting the two welding ends 303, and details are not repeated herein; 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 18, in the present embodiment, 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 sequentially 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 among the 3 connection parts 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 among the second connection region parts is a long pitch, the pitch between the two welding ends corresponding to the rest of the second connecting parts in the second connecting area is a whole pitch (the whole pitch is 6 in the embodiment); of course, the connection portion of the second connection region where the pitch of one corresponding welding end is a long pitch may be located at two welding ends (located at the third layer and the second layer in the radial direction of the stator core) corresponding to the first second connection portion 220-1, the pitch of two welding ends (located at the fifth layer and the fourth layer in the radial direction 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 seventh layer and the sixth layer in the radial direction of the stator core) corresponding to the third second connection portion 220-3 is a full pitch.

Specifically, with reference to fig. 1 to 18, the first second connection portion 220-1 of any one of the second connection region portions 120 correspondingly connects the two slot interiors 301 connected to the two welding terminals 303 to the 1 st slot of the seventh layer of the stator core and the 43 th slot of the sixth layer of the stator core, the second connection portion 220-2 correspondingly connects the two slot interiors 301 connected to the two welding terminals 303 to the fifth layer 1 st slot of the stator core and the fourth layer 42 th slot of the stator core, and the third second connection portion 220-3 correspondingly connects the two slot interiors 301 connected to the two welding terminals 303 to the third layer 1 st slot of the stator core and the 43 th slot of the second layer of the stator core, so that it can be seen that the first second connection portion 220-1 and the third second connection portion 220-3 among the pitches between the two welding terminals corresponding to the 3 second connection portions 220 of the second connection region portion 120 and the two welding terminals corresponding to the 4 first connection portions 210 of the first connection region portion 110 are in the same pitch Similarly, the pitch between the two welding terminals corresponding to the second connection portion 220-2 of the second connection region portion 120 is different from the pitch between the two welding terminals corresponding to the 4 first connection portions 210 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 each phase winding is 2, the stator winding is three-phase, it should be noted that the 12 connection region portions may be located at circumferentially adjacent positions of the stator core, or may be separately disposed.

With reference to fig. 1 to 15, in the present embodiment, the stator winding includes a long pitch 7 of pitch between the inside of the corresponding slots of one half of the plurality of terminals 3, and a short pitch 5 of pitch between the inside of the corresponding slots of the other half of the plurality of terminals, that is, the stator winding includes U-shaped conductors 200A having a long pitch of pitch between the inside of the corresponding slots of the plurality of terminals, and the stator winding includes U-shaped conductors 200B having a short pitch of pitch between the inside of the corresponding slots of the plurality of terminals, each U-shaped conductor 200A having a long pitch surrounds each U-shaped conductor 200B having a short pitch, and two conductors are located in two adjacent stator slots; when M is 8, the pitch inside the slots corresponding to the 4 plug terminals of the 24 connection regions in the 48 connection regions of the stator winding is a long pitch, and the pitch inside the slots corresponding to the 4 plug terminals of the remaining 24 connection regions is a short pitch.

Illustratively, as shown in fig. 1 to 18, in the present embodiment, of the 48 connection region portions (72 connection region portions), the welding end of the first connection region portion 110 located at the second layer in the radial direction of the stator core and the welding end of the second connection region portion 120 all extend in the same direction to the right, and the slot pitches all are 3.5 slot pitches, the welding end of the first connection region portion 110 located at the third layer in the radial direction of the stator core and the welding end of the second connection region portion 120 all extend in the same direction to the left, and the slot pitches all extend in 2.5 slot pitches, the welding end of the first connection region portion 110 located at the fourth layer in the radial direction of the stator core and the welding end of the second connection region portion 120 all extend in the same direction to the right, and the slot pitches all extend in 3.5 slot pitches, the welding end of the first connection region portion 110 located at the fifth layer in the radial direction of the stator core and the welding end of the second connection region portion 120 all extend in the same direction to the left, and the slot pitches are 3.5 slot pitches, the extending directions of the welding end of the first connecting area part 110 positioned on the radial sixth layer of the stator core and the welding end of the second connecting area part 120 are the same and extend rightwards, the slot pitches are 2.5 slot pitches, the extending directions of the welding end of the first connecting area part 110 positioned on the radial seventh layer of the stator core and the welding end of the second connecting area part 120 are the same and extend leftwards, and the slot pitches are 3.5 slot pitches, therefore, the extending directions of the welding end of the first connecting area part positioned on the radial same layer of the stator core and the welding end of the second connecting area part in 48 connecting area parts are the same and the slot pitches are the same. 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 production cost and improves the processing efficiency.

As shown in fig. 10, 13, and 16, in the present 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. 13, in any branch, the first U-shaped conductor 200A corresponding to the first connection portion 210-1 located 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 13 th and 20 th slots, and the second U-shaped conductor 200B corresponding to the first connection portion 210-1 is located in the 7 th and 2 nd 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 13 th groove and the 20 th groove, and a second U-shaped conductor 200B corresponding to the second first connecting part 210-2 is positioned in the 7 th groove and the 2 nd groove; 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 layer and the fourth layer in the radial direction of the stator core is positioned in the 13 th slot and the 18 th slot, and the first U-shaped conductor 200A corresponding to the third first connecting part 210-3 is positioned in the 7 th slot and the 48 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 13 th slot and the 18 th slot, and the first U-shaped conductor 200A corresponding to the fourth first connecting part 210-4 is positioned in the 7 th slot and the 48 th slot; the first U-shaped conductor 200A corresponding to the first second connecting part 220-1 in the second connecting region part 120 of the sixth layer and the seventh layer in the radial direction of the stator core is positioned in the 1 st slot of the seventh layer and the 8 th slot of the eighth layer of the stator core, and the second U-shaped conductor 200B corresponding to the first second connecting part 220-1 is positioned in the 43 th slot of the sixth layer and the 38 th slot of the fifth layer 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 1 st slot and the 8 th slot of the fifth layer of the stator core, and the second U-shaped conductor 200B corresponding to the second connecting part 220-2 is positioned in the 42 th slot and the 37 th slot of the third layer of the stator core; the second U-shaped conductor 200B 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 1 st slot and the 6 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 43 th slot and the 36 th slot of the first layer of the stator core; as can be seen, 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.

Schematically, as shown in fig. 1 to 16, in the first to sixth embodiments, when two branch windings are provided in each phase winding of the stator winding, the lead wires (including the lead terminals and the lead terminals) of the first branch windings U1 and U2 in each phase winding of the stator winding are located on the radially innermost side (first layer) of the second connection region part 120, or may be located on the radially outermost side (eighth layer) of the second connection region part 120.

Illustratively, as shown in fig. 17 and 18, in the seventh and eighth embodiments, when four branches are included in each phase of the stator winding, the lead wires (including the lead ends and the lead ends) of the first branch winding U1 and the second branch winding U2 in each phase of the stator winding are located on the radially innermost side (the first layer) of the second connecting region portion 120, and the lead wires (including the lead ends and the lead ends) of the third branch winding U3 and the fourth branch winding U4 in the phase of the stator winding are located on the radially outermost side (the eighth layer) of the second connecting region portion 120, as shown in fig. 18, of course, the lead wires of each branch winding in the stator winding may be located on the radially outermost side (the eighth layer) of the second connecting region 120, or may be located on the radially innermost side (the first layer) of the second connecting region portion 120.

With reference to fig. 3, in the first and second embodiments, the lead wires of the first branch winding U1 of the phase winding U are located in the 6 second connection region portions 120 of the first (Q1), and the lead wires 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), in the first embodiment, the number of slots per phase per pole is 2, that is, Q is 2;

exemplarily, as shown in fig. 3, in the first and second embodiments, the first branch winding of the phase winding U 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 coils to the radial inner side (i.e., the side close to the central axis 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) U1 7 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 2-pole coil, the q 4-pole coil, the q 6-pole coil, the q 8-pole coil, the q 10-pole coil, and the q 12-pole coil to the tail portion U1 5634 4 of the; 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, the second branch winding of the second 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., on 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., on 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 positioned in 6 second connection region parts of q2, the head part U4A of the second sub-branch winding positioned on the first radial layer of the stator core is radially connected with the tail part U2B of the first sub-branch winding positioned on the eighth radial layer of the stator core, and the second sub-branch winding positioned on the tail part U4B of the eighth radial layer of the stator core is connected in an interphase mode; the U1 and U3 sub-branch windings in the two sub-branch windings of the first branch winding in the U-phase winding are located in 2 circumferentially adjacent slots of the stator core, the U2 and U4 sub-branch windings in the two sub-branch windings of the second branch winding are located on the radial outer side of the stator core and in the 2 circumferentially adjacent slots of the stator core, in the embodiment, N is 2, and Q is 2.

In a ninth 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 this embodiment), and 48 (72) connection region portions in the stator windings include: 36 (60) first connection area parts 110, where the first connection area parts 110 include 2 first connection parts 210-1 (located at a first layer and a second layer in the radial direction of the stator core), 210-2 (located at a third layer and a fourth layer in the radial direction of the stator core), and the two welding ends corresponding to the 2 connection parts of the first connection area parts 110 are all at the same pitch; the 48 connection region portions in the stator winding include: 12 second connection region parts 120, wherein the second connection region parts 120 include 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 ends corresponding to the second connection part 220-1 is a long pitch, and the pitch between the two welding ends corresponding to the second connection part 220 of the second connection region part 120 is different from the pitch between the two welding ends corresponding to the 2 first connection parts 210 of the first connection region part 110; as can be seen, the pitch between the two bonding terminals corresponding to 1 connection portion of the second connection region portion 120 is different from the pitch between the two bonding terminals corresponding to 2 connection portions of the first connection region portion 110.

For example, as shown in fig. 10, 13, 16, and 20, U-phase conductor lead terminals include U-phase terminals U1 and U2, V-phase conductor lead terminals include V-phase terminals V1 and V2, W-phase conductor lead terminals include W-phase terminals W1 and W2, U-phase conductor lead terminals U3 and U4, and V-phase conductor lead terminals V3 and V4, and W-phase conductor lead terminals W3 and W4 use connectors to perform neutral point connection, i.e., completing a star connection of parallel connection of 2-phase windings of the motor, as shown in fig. 10, 13, 16, and 20, U-phase conductor lead terminals U1 and U2 connect W-phase conductor lead terminals W3 and W4, W-phase conductor lead terminals W1 and W2 connect V-phase conductor lead terminals V3 and V4, V-phase conductor lead terminals V1 and V2 connect U-phase conductor lead terminals U5953 and U-phase conductor lead terminals 4, i.e., completing a triangle connection of parallel connection of the motor;

as shown in fig. 17 and 21, U-phase conductor lead ends include U-phase terminals U1, U2, U3 and U4, V-phase terminals V1, V2, V3 and V4, W-phase conductor lead ends W1, W2, W3 and W4, and U-phase conductor outlet ends, V-phase conductor outlet ends and W-phase conductor outlet ends are connected by connectors to perform neutral point connection, that is, a star connection method of parallel connection of 4-branch windings of the motor is completed.

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 to one.

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 (10)

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 method is characterized in that: 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 at least 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 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 3 × Q2;

and among the 3Q P connecting area parts, the extending directions of the welding ends of the first connecting area part and the second connecting area part which are positioned on the same layer in the radial direction of the stator core are the same, and the groove distances are the same.

2. The stator according to claim 1, wherein 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 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 conductors corresponding to the connection portion is a short pitch.

3. The stator for an electric machine according to claim 1, wherein the phase winding has an outgoing line per branch winding, the outgoing line being located at a radially innermost side and/or a radially outermost side of the second connection region portion.

4. The stator according to claim 3, wherein when two branch windings of the respective phase windings are connected in parallel in this order in the circumferential direction of the stator core, the lead-out wires of the first branch winding of the phase winding are located in the first 3 × Q second connection region portions, and the lead-out wires of the second branch winding of the phase winding are located in the second 3 × Q second connection region portions.

5. The stator according to claim 4, 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.

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

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 connection portions of the first connection region portion is a full pitch.

8. The stator of claim 7, wherein when M is greater than or equal to 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.

9. The stator according to claim 8, wherein the pitch between the two welding terminals corresponding to only one of the second connection portions in the second connection region is a long pitch, and the second connection portion can be located at any position in the first six layers on one radial side of the second connection region, and the pitch between the two welding terminals corresponding to the remaining second connection portions in the second connection region is a full pitch.

10. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 9.

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