CN111555510A

CN111555510A - Motor stator and motor

Info

Publication number: CN111555510A
Application number: CN202010521903.XA
Authority: CN
Inventors: 刘延海; 柏荣键
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-08-18

Abstract

The invention relates to the field of motors, and discloses a motor stator and a motor, which comprise: 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 invention adopts a completely symmetrical structure on the magnetic circuit through the winding structure, eliminates the problem of circulating current generated by an asymmetrical structure, adopts fewer U-shaped conductors, simplifies the manufacturing procedure, reduces the production cost and improves the processing efficiency.

Description

Motor stator and motor

Technical Field

The invention relates to the field of motors, in particular to a motor stator and a 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.

Disclosure of Invention

The invention provides a motor stator and a motor, wherein a completely symmetrical structure is adopted on a magnetic circuit through a winding structure, the problem of circulating current generated by an asymmetrical structure is solved, fewer U-shaped conductors are adopted, the manufacturing process is simplified, the production cost is reduced, and the processing efficiency is improved.

In order to achieve the purpose, the invention adopts the following technical scheme:

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 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 outgoing lines of the two branch windings of the phase winding of the stator winding are positioned in the first 3x Q connecting area parts, and the outgoing lines of the second branch winding of the phase winding are positioned in the second 3x Q connecting area parts.

Further, the stator winding includes: the plurality of plug terminals are positioned outside the stator iron core slots, the other ends of the plug terminals are connected with the insides of the two slots of the same U-shaped conductor, and the pitch between the insides of the slots corresponding to the plurality of plug terminals is a whole pitch;

further, 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;

further, when Q is equal to 2, 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 short 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 long pitch; when Q is equal to 3, the pitch between the inside of the slots corresponding to the plug wire end of the first U-shaped conductor corresponding to the partial connection portion of each branch winding is a short 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 long pitch.

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 pole numbers 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 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 connection region portion.

Furthermore, the number of conductors in the slots which can be accommodated by the stator winding along the radial direction of the stator core divides each slot into M layers, 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 connecting area part is a whole pitch.

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

By applying the technical scheme of the invention, the motor stator and the motor are as follows: 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 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 outgoing lines of the two branch windings of the phase winding of the stator winding are positioned in the first 3x Q connecting area parts, and the outgoing lines of the second branch winding of the phase winding are positioned in the second 3x Q connecting area parts. 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 stator of a motor according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of a phase stator winding structure according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of a U-shaped conductor structure according to an embodiment of the invention;

FIG. 4 is a partial schematic structural diagram of two slots adjacent to each other in phase according to an embodiment of the present invention;

FIG. 5 is a plan view of a stator winding of one phase according to a second embodiment of the present invention;

fig. 6 is a plan development view of a stator winding of one phase in the third embodiment of the present invention;

fig. 7 is a schematic structural view of a stator of a motor according to a fourth embodiment of the present invention;

fig. 8 is a schematic view of a one-phase stator winding structure according to a fourth embodiment of the present invention;

FIG. 9 is a schematic diagram of a U-shaped conductor structure in accordance with a fourth embodiment of the present invention;

fig. 10 is a plan development view of a one-phase stator winding in accordance with a fifth embodiment of the present invention;

fig. 11 is a plan development view of a one-phase stator winding in a sixth embodiment of the invention;

FIG. 12 is a schematic diagram of an electrical connection in an embodiment of the present invention;

FIG. 13 is another electrical connection schematic in an embodiment of the present 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 used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.

In the figure, the extending direction of A1a2 is parallel to the axial direction of the stator core, 0102 is three directions which are drawn by way of example and extend along the radial direction of the stator core, and the pitch in the application is the interval between the inside of a groove corresponding to the welding end of one U-shaped conductor and the inside of a 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 stator of an electric motor, 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, 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.

With reference to fig. 1 to 2 and 7 to 8, in a first embodiment, a fourth 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 pole per phase is greater than or equal to 2; two slots 21 are provided for each magnetic pole of the rotor, the number Q of slots per pole per phase is 2 in the present embodiment, the rotor has 12 (P is 12 in the first embodiment and the second embodiment) poles and is so 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. 5 and 10, the number of poles in the stator winding is 8 (P is 8 in the second embodiment and the fifth embodiment), correspondingly, the number of slots 21 provided in the stator core 20 is equal to 48, U1 branch windings and U2 branch windings in the U-phase winding are sequentially connected in parallel in the circumferential direction of the stator core, V1 branch windings and V2 branch windings in the V-phase winding are sequentially connected in parallel in the circumferential direction of the stator core, and W1 branch windings and W2 branch windings in the W-phase winding are sequentially connected in parallel in the circumferential direction of the stator core; as shown in fig. 6 and 11, in the third and sixth embodiments, the stator winding 10 is a three-phase (i.e., U-phase, V-phase, W-phase) winding, the number Q of slots per phase per pole is 3, the rotor has 8 poles and is the same 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., 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 are sequentially connected in parallel in the circumferential direction of the stator core; further, in the present embodiment, the stator core 20 is formed with two end faces 25, 26 in the axial direction of the stator core by laminating a plurality of annular magnetic steel plates in which a plurality of insulating papers are inserted, with the stator core 20 being defined by the adjacent two slots 21 by one tooth 22, it should be noted that other conventional metal plates may be used instead of the magnetic steel plates.

With reference to fig. 5 and 10, in the second and fifth embodiments, the stator winding 10 includes 48 connection region portions 100, and in the first, third, fourth and sixth embodiments, the stator winding 10 includes 72 connection region portions 100, so that it can be seen that the number of connection region portions is related to the number of slots, poles and phases per pole per phase, and in the present embodiment, the connection region portions include: the 4 connecting portions 110 (or 3 connecting portions 110) 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 200 sequentially includes: the stator core comprises a welding end 303, a slot interior 301, a plug wire end 302, a slot interior 301 and a welding end 303 which are sequentially connected, wherein the two slot interiors 301 are positioned in two slots of the stator core which are separated by a specified slot distance, one end of the stator core 25 which is positioned outside the slots is connected with the plug wire ends of the two slot interiors 301, the other end 26 of the stator core which is positioned outside the slots is connected with the two welding ends 303, and each connecting part 110 is formed by connecting one welding end 303 of a first U-shaped conductor 200 with one welding end 303 of a second U-shaped conductor 200.

As shown in fig. 2, 5, 8, and 10, in the first, second, fourth, and fifth embodiments, the two branch windings U1 and U2 of the phase winding (U phase is an example) of the stator winding 10 have lead wires, the lead wire of the first branch winding U1 of the phase winding U is located in the 6 connection region portions 100 of the first (Q1), and the lead wire of the second branch winding U2 of the phase winding U is located in the 6 connection region portions 100 of the second (Q2), and the number of slots per pole per phase is 2 in the first and second embodiments, that is, Q is 2; as shown in fig. 6 and 11, in the third and sixth embodiments, the two branch windings U1 and U2 of the phase winding (U-phase is taken as an example) of the stator winding 10 have lead wires, the lead wire of the first branch winding U1 of the phase winding U is located in the 9 connection region portions 110 of the first (Q1), the lead wire of the second branch winding U2 of the phase winding U is located in the 9 connection region portions 100 of the second (Q2), and the number of slots per pole per phase is 3 in the fourth embodiment, that is, Q is 3; 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.

Alternatively, as shown in fig. 1 to 6, in the first, second, and third embodiments, the pitch inside the slot corresponding to the plurality of plug terminals of the stator winding including 48 connection region portions (or 72 connection region portions) is the full pitch, when M is 8, the pitch inside the slot corresponding to the 4 plug terminals of the stator winding including 48 connection regions is the full pitch, and further, the stator winding uses a single U-shaped conductor 200, and the pitch between the two slot interiors of the U-shaped conductor 200 is the full pitch (when Q is 2 in the first and second embodiments, the pitch between the two slot interiors of the U-shaped conductor 200 is the full pitch 6, and when Q is 3 in the third embodiment, the pitch between the two slot interiors of the U-shaped conductor 200 is the full pitch 9).

Alternatively, as shown in fig. 7 to 11, in the fourth, fifth and sixth embodiments, the pitch between the inside of the slots corresponding to one part (half) of the plug terminals in the plurality of plug terminals of the stator winding including the 48 connection region portions 100 (or the 72 connection region portions 100) is a long pitch, and the pitch between the inside of the slots corresponding to another part (half) of the plug terminals in the plurality of plug terminals is a short pitch; that is, the stator winding includes a U-shaped conductor 200A having a long pitch in the inter-slot pitch corresponding to one half of the plug terminals, the stator winding includes a U-shaped conductor 200B having a short pitch in the inter-slot pitch corresponding to the other half of the plug terminals, the U-shaped conductor 200A having a long pitch surrounds the U-shaped conductor 200B having a short pitch, and the two conductors are located in two adjacent stator slots. When M is 8, the pitch of the inside of the groove corresponding to 4 plug terminals of 24 connection regions in 48 connection regions of the stator winding is a long pitch, and the pitch of the inside of the groove corresponding to 4 plug terminals of the remaining 24 connection regions is a short pitch; (in the fourth and fifth embodiments, when Q is 2, the pitch between the two groove interiors of the U-shaped conductor 200A is long pitch 7, and the pitch between the two groove interiors of the U-shaped conductor 200B is short pitch 5, and in the sixth embodiment, when Q is 3, the pitch between the two groove interiors of the U-shaped conductor 200A is long pitch 10, and the pitch between the two groove interiors of the U-shaped conductor 200B is short pitch 7).

When Q is equal to 2, as shown in fig. 10, further, 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. 10, the first U-shaped conductor 200A corresponding to the first connecting portion 110-1 located at the seventh and eighth layers in the radial direction of the stator core in any branch is located at the 20 th and 13 th slots, and the second U-shaped conductor 200B corresponding to the first connecting portion 110-1 is located at the 7 th and 2 nd slots; a first U-shaped conductor 200A corresponding to a second connecting part 110-2 positioned at the fifth layer and the sixth layer in the radial direction of the stator core is positioned in the 20 th groove and the 13 th groove, and a second U-shaped conductor 200B corresponding to the second connecting part 110-2 is positioned in the 7 th groove and the 2 nd groove; a first U-shaped conductor 200A corresponding to a third connecting part 110-3 positioned on a third layer and a fourth layer in the radial direction of the stator core is positioned in a 20 th groove and a 13 th groove, and a second U-shaped conductor 200B corresponding to the third connecting part 110-3 is positioned in a 7 th groove and a2 nd groove; a second U-shaped conductor 200B corresponding to a fourth connecting part 110-4 positioned on the first layer and the second layer in the radial direction of the stator core is positioned in the 20 th slot and the 13 th slot, and a first U-shaped conductor 200A corresponding to the connecting part 110-4 is positioned in the 7 th slot and the 2 nd slot; 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. 11, when Q is equal to 3, 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 in the present embodiment 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 partial connection portions is a long pitch; as shown in fig. 11, the second U-shaped conductor 200B corresponding to the first connecting portion 110-1 located at the seventh and eighth layers in the radial direction of the stator core in any branch is located at the 12 th and 19 th slots, and the first U-shaped conductor 200A corresponding to the first connecting portion 110-1 is located at the 3 rd and 65 th slots; the second U-shaped conductor 200B corresponding to the second connecting part 110-2 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 19 th slot, and the first U-shaped conductor 200A corresponding to the second connecting part 110-2 is positioned in the 3 rd slot and the 65 th slot; the second U-shaped conductor 200B corresponding to the third connecting part 110-3 positioned on the third layer and the fourth 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 third connecting part 110-3 is positioned in the 3 rd slot and the 65 th slot; the second U-shaped conductor 200B corresponding to the fourth connecting part 110-4 positioned on 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 connecting part 110-4 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 of 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 110-1 positioned in a seventh layer and an eighth 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 first connecting part 110-1 is positioned in a2 nd slot and a 64 th slot; a first U-shaped conductor 200A corresponding to a second connecting part 110-2 positioned at the fifth layer and the sixth layer in the radial direction of the stator core is positioned in the 11 th groove and the 21 st groove, and another first U-shaped conductor 200A corresponding to the second connecting part 110-2 is positioned in the 2 nd groove and the 64 th groove; a first U-shaped conductor 200A corresponding to a third connecting part 110-3 positioned on 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 connecting part 110-3 is positioned in a2 nd slot and a 64 th slot; a first U-shaped conductor 200A corresponding to a fourth connecting part 110-4 positioned on 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 connecting part 110-4 is positioned in the 2 nd slot and the 64 th slot; the pitch between the inside of the grooves corresponding to the plug wire ends of the first U-shaped conductor 200A corresponding to another circumferentially adjacent connecting part of the above-mentioned each layer in the branch is a long pitch, and the pitch between the inside of the grooves corresponding to the plug wire ends of another first U-shaped conductor 200A corresponding to the connecting part is a long pitch;

therefore, when Q is equal to 3, the pitch between the inside of the slots corresponding to the plug ends 302 of the second U-shaped conductors 200B corresponding to the two-thirds connection portion of each branch winding is a short pitch, the pitch between the inside of the slots corresponding to the plug ends 302 of the first U-shaped conductors 200A corresponding to the two-thirds connection portion is a long pitch, the pitch between the inside of the slots corresponding to the plug ends 302 of the first U-shaped conductors 200A corresponding to the one-third connection portion of the branch winding is a long pitch, and the pitch between the inside of the slots corresponding to the plug ends 302 of the other first U-shaped conductors 200A corresponding to the connection portion 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 portion of the branch winding is a long pitch, and may also be a short pitch;

illustratively, as shown in fig. 2, in the first embodiment, the second embodiment, the fourth embodiment, and the fifth embodiment, the first branch winding of the phase winding U includes 2 sub-branch windings, two sub-branch windings U1A, U3A of the first branch winding are located on the radial outer side of the stator core (i.e., on the side away from the central axis direction) and are sequentially connected in series with a P/2-pole number coil to the radial outer side of the stator core (i.e., on the side away from the central axis direction) along the circumferential direction of the stator core, and P is 12, i.e., the U1A sub-branch winding is located in series from the radially outermost side (eighth layer) of the stator core to the U-shaped conductor 200(200A or 200B) of a q 2-pole number coil, a q 4-pole number coil, a q 6-pole number coil, a q 8-pole number coil, a q 10-pole number coil, and a q 12-pole number coil to the tail U1B of; the U3 branch winding is also serially connected from the outermost side (eighth layer) in the radial direction of the stator core to the tail U3B of the innermost side (first layer) in the radial direction of the stator core from the U-shaped conductor 200(200A or 200B) of a q 2-pole coil, a q 4-pole coil, a q 6-pole coil, a q 8-pole coil, a q 10-pole coil and a q 12-pole coil in the circumferential direction of the stator core; the first branch winding is positioned in 6 connecting area parts of q1, the tail part U1B of the first sub-branch winding positioned on the first radial layer of the stator core is radially connected with the head part U3A of the second sub-branch winding positioned on the eighth radial layer of the stator core, and the tail part U3B of the second sub-branch winding 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. 2, the second branch winding of the phase winding U in the first, second, third and fourth embodiments includes 2 sub-branch windings, the U2A, U4A sub-branch windings of the two sub-branch windings of the second branch winding are sequentially connected in series from the P/2 number of poles coil to the radial outer side (i.e., the side away from the central axis direction) of the stator core along the circumferential direction of the stator core, and P is 12, i.e., the U2A 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 to the tail U2B of the radially outermost side (the eighth layer) of the stator core from the U-shaped conductor 200(200A or 200B) of the q1 number of poles coil, the q11 number of poles coil, the q9 number of poles coil, the q7 number of poles coil, the q5 number of poles coil and the q3 number of poles coil; the U4A 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 200(200A or 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 connection region portions of q2, the head portion U4A of the second sub-branch winding located at the first radial layer of the stator core is radially connected with the tail portion U2B of the first sub-branch winding located at the eighth radial layer of the stator core, and the second sub-branch winding located at the tail portion U4B of the eighth radial layer of the stator core is connected in an interphase mode; that is, 2 sub-branch windings of the second branch winding are positioned in 6 connection region parts of q2 and are connected in series along the radial direction of the stator core; 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 examples N is 2 and Q is 2; 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, and the U2 and U4 sub-branch windings in the two sub-branch windings of the second branch winding are located in 2 circumferentially adjacent slots of the stator core.

As shown in fig. 6, in the third and sixth embodiments, the first branch winding of the phase winding U includes 3 sub-branch windings, the sub-branch windings U1, U3 and U5 are located on the radial 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 radial 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 radially innermost (first layer) tail U1B of the stator core, where the U-shaped conductor 200(200A or 200B) of the q 2-pole coil, the q 4-pole coil, the q 6-pole coil and the q 8-pole coil; the U5 sub-branch winding is also formed by sequentially connecting U-shaped conductors 200(200A or 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 part U5B of the radially innermost side (first layer) of the stator core along the circumferential direction of the stator core; the U3 sub-branch winding is also formed by sequentially connecting U-shaped conductors 200(200A or 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 9 connection area portions of q1, the tail portion U1B of the first sub-branch winding located on the radial first layer of the stator core is radially connected with the head portion U5A of the second sub-branch winding located on the radial eighth layer of the stator core, the second sub-branch winding is located in 9 connection area portions of q1, the tail portion U5B of the second sub-branch winding located on the radial first layer of the stator core is radially connected with the head portion U3A of the third sub-branch winding located on the radial eighth layer of the stator core, the third sub-branch winding is located in 9 connection area portions of q1, and the tail portion U3B of the third sub-branch winding located on the radial first 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. 6, in the third and sixth embodiments, the second branch winding of the phase winding U includes 3 sub-branch windings, the sub-branch windings U2, U4 and U6 are located on the radially inner side (i.e., the side close to the central axis direction) of the stator core U2A and are sequentially connected in series with P/2-pole coils to the radially outer side (i.e., the side away from the central axis direction) of the stator core along the circumferential direction of the stator core, and P is 8, i.e., the first sub-branch winding is sequentially connected in series from the radially innermost side (first layer) U2A of the stator core to the circumferentially outermost side (eighth layer) of the stator core U2B of the U-shaped conductor 200(200A or 200B) of the q 1-pole coil, the q 3-pole coil, the q 5-pole coil and the q 7-pole coil; the U6 branch winding is also formed by sequentially connecting U-shaped conductors 200(200A or 200B) of a coil with the number of q1 poles, a coil with the number of q7 poles, a coil with the number of q5 poles and a coil with the number of q3 poles in series from the radially innermost (first layer) U6A of the stator core to the tail U6B of the radially outermost (eighth layer) of the stator core along the circumferential direction of the stator core; the U4 sub-branch winding is also connected in series from the U-shaped conductor 200 of the coil with the number of q1 poles, the coil with the number of q7 poles, the coil with the number of q5 poles and the coil with the number of q3 poles on the radially innermost side (the first layer) of the stator core along the circumferential direction of the stator core to the tail U4B of the radially outermost side (the eighth layer) of the stator core; the first sub-branch winding is positioned in 9 connection region parts of q2, the head part U6A of the second sub-branch winding positioned at the first radial layer of the stator core is radially connected with the head part U2B of the first sub-branch winding positioned at the eighth radial layer of the stator core, the third sub-branch winding is positioned in 9 connection region parts of q1, the head part U4A of the third sub-branch winding positioned at the first radial layer of the stator core is radially connected with the tail part U6B of the second sub-branch winding positioned at the eighth radial layer of the stator core, the third sub-branch winding is positioned in 9 connection region parts of q1, and the third sub-branch winding positioned at the tail part U4B of the eighth radial layer of the stator core is connected in an interphase mode; namely, the 3 sub-branch windings of the second branch winding are positioned in 9 connection region 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.

Further, in example three, example six N is 3, 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 connection region portion 100, or may be located on the radially outermost side (eighth layer) of the connection region portion 100.

In the seventh embodiment, the number of the stator windings in the slots that can be accommodated along the radial direction of the stator core is 4, (M is 4 in this embodiment), each of the 48 (72) connection region portions in the stator winding includes 2 connection portions 110, where the first connection portion 110 (located at the third layer and the fourth layer in the radial direction of the stator core), the second connection portion 110 (located at the first layer and the second layer in the radial direction of the stator core), and the two welding ends corresponding to the 2 connection portions 110 are the same and are all the same pitch; in the first to sixth embodiments, with reference to fig. 5, 6, 10, and 11, the number of the inside of the slots that can be accommodated by the stator winding along the radial direction of the stator core is 8 (M is 8 in this embodiment), each of the 48 (72) connection region portions in the stator winding includes 4 connection portions 110, the fourth connection portion 110-4 (located at the first layer and the second layer in the radial direction of the stator core), the third connection portion 110-3 (located at the third layer and the fourth layer in the radial direction of the stator core), the second connection portion 110-2 (located at the fifth layer and the sixth layer in the radial direction of the stator core), and the first connection portion 110-1 (located at the seventh layer and the eighth layer in the radial direction of the stator core) are sequentially disposed along the radial outside of the stator core toward the radial inside of the stator core, and the pitches between the two welding ends corresponding to the 4 connecting parts 110 are the same and are all the whole pitches;

specifically, referring to fig. 10, the first connecting portion 100-1 of any connecting region portion 100, the two slot interiors 301 corresponding to two connecting ends 303 are located in 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 connecting portion 110-2 and connecting two connecting ends 303 are located in 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 connecting portion 110-3 and connecting two connecting ends 303 are located in 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 connecting portion 110-4 and connecting two connecting ends 303 are located in 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, so that the pitches between the two slot interiors 301 corresponding to two connecting ends 303 of the 4 connecting portions 110 of the connecting region portion 100 are the same, are all at a full pitch; the positions of the 4 connecting portions 110 of the remaining 47 connecting region portions 100 are the same as the pitch of the two groove interiors 301 corresponding to the 4 connecting portions 110 of the connecting region portion 100 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).

Illustratively, as shown in fig. 12, U-phase conductor lead terminals have U-phase terminals U1 and U2, V-phase conductor lead terminals have V-phase terminals V1 and V2, W-phase conductor lead terminals have W-phase terminals W1 and W2, U-phase conductor lead terminals U3 and U4, 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., a star connection of parallel windings of 2-phase of the motor is completed, as shown in fig. 13, 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 U3 and U4, i.e., a delta connection of parallel windings of 2-phase 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.

In the present invention, the number of slots per phase per pole is equal to the number of stator slots/number of motor poles/number of phases, and the pole pitch is equal to the number of slots per phase per pole/number of motor poles, and the number of slots is not limited to 48 slots, but may be other numbers of slots, for example: the number of slots per phase per pole is not limited to 2, 3, etc., and is not limited thereto.

The motor provided by the embodiment of the present invention includes the motor stator in the above embodiment, and therefore, the motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not described herein again.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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. Those skilled in the art will understand what is specifically meant by the present invention. Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments 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, and that various obvious changes, rearrangements and substitutions may be made therein by those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric machine stator comprising:

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 outgoing lines of the two branch windings of the phase winding of the stator winding are positioned in the first 3x Q connecting area parts, and the outgoing line of the second branch winding of the phase winding is positioned in the second 3x Q connecting area parts.

2. The electric machine stator of claim 1, wherein the stator winding comprises: the plurality of plug terminals are positioned outside the stator iron core slots, the other ends of the plug terminals are connected with the insides of two slots of the same U-shaped conductor, and the pitches among the insides of the slots corresponding to the plurality of plug terminals are full pitches;

3. the electric machine stator of claim 1, wherein the stator winding comprises: the multiple plug terminals are positioned outside the stator core slot, the other ends of the multiple plug terminals are connected with the inside of two slots of the same U-shaped conductor, the pitch between the inside of the slots corresponding to one part of the plug terminals in the multiple plug terminals is long pitch, and the pitch between the inside of the slots corresponding to the other part of the plug terminals in the multiple plug terminals is short pitch;

4. the stator according to claim 3, 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 branch winding is a short 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 long pitch; when Q is equal to 3, the pitch between the inside of the slots corresponding to the plug wire end of the first U-shaped conductor corresponding to the partial connection portion of each branch winding is a short 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 long pitch.

5. The stator according to claim 1, 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 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 motor stator according to claim 1, wherein the lead-out wires of the two branch windings of the phase winding are located on a radially innermost side or an outermost side of the connection region portion.

8. 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 connection region portion is a full pitch.

9. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 8.