CN116722689A

CN116722689A - Motor stator and motor

Info

Publication number: CN116722689A
Application number: CN202310444474.4A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Beijing Hainachuan Automotive Parts Co Ltd
Current assignee: Beijing Hainachuan Automotive Parts Co Ltd
Priority date: 2023-02-28
Filing date: 2023-04-21
Publication date: 2023-09-08

Abstract

The invention discloses a motor stator and a motor, wherein the motor stator comprises a stator core and a stator winding, a plurality of axially penetrating stator grooves are uniformly formed in the inner wall of the stator core along the circumferential direction, the stator winding sequentially penetrates through the plurality of stator grooves along the circumferential direction of the stator core and forms a plurality of conductor layers from inside to outside or from outside to inside, the stator winding is turned through an innermost layer and an outermost layer, cross-layer connection is realized through an intermediate layer conductor layer to form a bending path, flat wires are sequentially connected to form a plurality of annular branches, and finally, the stator winding forms a plurality of parallel connection branches by disconnecting any point on the annular branches.

Description

Motor stator and motor

Technical Field

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

Background

In the prior art, in order to realize higher power torque density, a flat copper coil with higher slot filling rate is selected as a stator winding of a vehicle driving motor, and because flat copper wires are formed windings, when the stator winding adopts different parallel branch numbers, the stator winding needs to adopt different arrangement modes, the design process is complex, and an improvement space exists.

Disclosure of Invention

The present invention aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the invention provides a motor stator, the connection mode of the stator winding of the motor stator has wide application range, and the sum of the distribution of each branch at each pole is equal, so that the electric potential sum of each branch is ensured to be equal, and the generation of circulation is avoided.

The invention also provides a motor with the motor stator.

The motor stator according to the embodiment of the invention comprises a stator core and a stator winding, wherein the stator core is provided with a plurality of stator slots which are distributed in the circumferential direction of the stator core, each adjacent four stator slots form a stator slot group, the stator winding comprises M phases, each pole winding occupies one stator slot group, each corresponding 2P stator slot groups, the ratio of the number of slots of the stator slots to the number of poles of the motor is Y, the stator winding penetrates through the plurality of stator slots along the circumferential direction of the stator core and forms a 2P multiplied by N conductor layer along the radial direction of the stator core, each corresponding stator slot group is arranged along a first direction, the stator slots in each stator slot group are arranged along the first direction,

The stator winding comprises a plurality of flat wires inserted in the stator slots, the flat wires are provided with crown ends and welding ends, wherein the welding ends of pins of the 2k-1 layer conductor layers of the m stator slots of the a stator slot group are inserted in one flat wire in phase, the welding ends of pins of the 2k layer conductor layers of the m stator slots of the a stator slot group are connected with the welding ends of pins of the 2k layer conductor layers of the other flat wire in the m stator slots of the a+1 stator slot group, and the flat wires can be divided into:

the two pins of the first flat wire are inserted into the 2k layer conductor layer and the 2k+1 layer conductor layer of the stator slot, and the pitch of the first flat wire is Y;

the second flat wire and the third flat wire are simultaneously inserted into a 2P multiplied by N layer conductor layer of the stator groove, the two pins are respectively inserted into a 2b stator groove group and a 2b-1 stator groove group of the same phase, the second flat wire and the third flat wire are alternately arranged in the 2P multiplied by N layer conductor layer, the pitch of the second flat wire is Y+1, and the pitch of the third flat wire is Y-1;

the two pins of the fourth flat wire, the fifth flat wire and the sixth flat wire are simultaneously inserted into the 1 st layer conductor layer of the stator slot and are respectively inserted into the same phase of the 2b-th stator slot group and the 2b+1-th stator slot group, the two pins of the fourth flat wire are respectively inserted into the first slots of the two stator slot groups or the fourth slots of the two stator slot groups, the pitch of the fourth flat wire is Y, the two pins of the fifth flat wire and the sixth flat wire are respectively inserted into the second slots and the third slots of the two stator slot groups, the pitch of the fifth flat wire is Y+1, the pitch of the sixth flat wire is Y-1,

Each phase winding comprises P branches, each branch is connected end to end, any pin of the flat wire in each branch is not connected with the other pin corresponding to the crown end or the welding end of the flat wire, so that the two pins respectively form the starting point and the ending point of the branch, M, N, P, a, b, m, k is an integer, m is less than or equal to 4, and k is less than or equal to (P multiplied by N).

According to the motor stator provided by the embodiment of the invention, the connection mode of the stator winding of the motor stator is wide in application range, the sum of the distribution of each branch at each pole is equal, the electric potential sum of each branch is ensured to be equal, and the generation of circulation is avoided.

In addition, the motor stator according to the embodiment of the invention can also have the following additional technical characteristics:

according to some embodiments of the present invention, the lead-in end and the lead-out end of the P branches are located at the crown end or the welding end of the flat wire at the same time, and pins corresponding to the lead-in ends of the P branches are located in the same stator slot and/or pins corresponding to the lead-out ends of the P branches are located in the same stator slot.

According to some embodiments of the present invention, the lead-in end and the lead-out end of the P branches are located at the crown end or the welding end of the flat wire at the same time, and the pins corresponding to the lead-in ends of the P branches are located at the same conductor layer and/or the pins corresponding to the lead-out ends of the P branches are located at the same conductor layer.

According to some embodiments of the invention, the flat wire comprises: two pins, which are used for being inserted into the stator slots to form the conductor layer; the crown part is connected between the two pins and is in an outward convex shape; and one end of the pin, which is far away from the crown part, forms a welding part.

According to some embodiments of the invention, the crown of each flat wire of the stator winding is located on one side of the stator slot outer end of the stator core, and the weld is located on the other side of the stator slot outer end.

According to some embodiments of the invention, the soldered portions of the first flat wire on both sides extend obliquely in a direction away from each other in an extending direction of the lead, the soldered portions of the second flat wire and the third flat wire on both sides extend obliquely in a second direction opposite to the first direction in the extending direction of the lead, and the soldered portions of the fourth flat wire, the fifth flat wire and the sixth flat wire on both sides extend obliquely in the first direction in the extending direction of the lead.

According to some embodiments of the invention, two flat wires adjacent in the winding direction are welded to each other by the weld.

According to some embodiments of the invention, the stator winding comprises 3 phases, each corresponding 6 stator slot groups, each phase winding comprising 3 branches.

According to some embodiments of the present invention, the P branches included in each phase winding may be connected in series or parallel, or a plurality of branches may be connected in series and then connected in parallel.

A motor according to another aspect of the invention comprises a motor stator as described above.

Drawings

Fig. 1 is a schematic arrangement of stator windings according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a first flat wire according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a second flat wire and a third flat wire according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a fourth flat wire, a fifth flat wire, and a sixth flat wire according to an embodiment of the present invention.

Reference numerals:

a first flat wire 10, a second flat wire 20, a third flat wire 30, a fourth flat wire 40, a fifth flat wire 50, a sixth flat wire 60, a pin 1, a weld 11, and a crown 2.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the prior art, in order to realize higher power torque density, a stator winding of a vehicle is a flat copper coil with higher slot filling rate, and because the flat copper coil is a forming winding, when each phase of the stator winding adopts different parallel branch numbers, the stator winding needs to adopt different arrangement modes, and the design process is complex.

Therefore, the embodiment of the invention designs a stator winding arrangement mode which has wider application range on the premise of ensuring that the sum of the distribution of each pole of each branch is equal, thereby ensuring the electric potential sum of each branch, avoiding the generation of circulation, simplifying the design process of the stator winding arrangement mode by the driving motor and reducing the design cost.

An electric motor stator according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

The motor stator according to an embodiment of the present invention may include: stator core and stator winding.

Further, the stator core has a plurality of stator slots arranged in the circumferential direction thereof, and each adjacent four stator slots constitute a stator slot group, and each pole of each phase winding occupies one stator slot group, that is, the number of slots per pole of each phase of the motor stator is 4.

The stator winding includes M phases, each corresponding 2P stator slot groups, and the stator winding includes M phases, wherein any one corresponding 2P stator slot groups, that is, one phase of the stator winding has P pairs of electrodes. The ratio of the number of stator slots formed in the stator core to the number of poles of the motor is Y, and the stator winding penetrates through the plurality of stator slots along the circumferential direction of the stator core and forms a 2P multiplied by N conductor layer along the radial direction of the stator core.

Each corresponding stator slot group is arranged in A first direction, which may be A clockwise direction (O-A direction as shown in fig. 1) or A counterclockwise direction (O-B direction as shown in fig. 1), and 4 stator slots in each stator slot group are arranged in the first direction, which are A first slot, A second slot, A third slot, and A fourth slot, respectively.

The stator winding comprises a plurality of flat wires inserted into stator slots of the stator core, each flat wire comprises two pins 1 connected with each other, each flat wire is shaped like a U, each flat wire is provided with a crown end and a welding end, one end of each pin 1, which is connected with each other, is the crown end, and the other end of each pin is the welding end.

Further, the flat wires may be divided into a first flat wire 10, a second flat wire 20, a third flat wire 30, a fourth flat wire 40, a fifth flat wire 50, and a sixth flat wire 60.

The two pins 1 of the first flat wire 10 are respectively inserted into the 2k layer conductor layer and the 2k+1 layer conductor layer of the stator slot, the pitch of the first flat wire 10 is Y, and the welding end of the pin 1 of the 2k-1 layer conductor layer inserted into the m stator slot of the a stator slot group of one flat wire in phase is connected with the welding end of the pin 1 of the 2k layer conductor layer inserted into the m stator slot of the a+1 stator slot group of the other flat wire.

Thus, after all the first flat wires 10 are connected to each other, 8P parallel and disjoint coil units are formed in one phase, and the coil units extend from the 2 nd conductor layer in the stator slot to the 2p×n-1 conductor layer in the stator slot. Wherein, the pin 1 of the first flat wire 10 of the 2 nd layer conductor layer in each stator slot is formed as a first end of the coil unit, and the pin 1 of the first flat wire 10 of the 2 nd P x N-1 st layer conductor layer in each stator slot is formed as a second end of the coil unit.

The two pins 1 of the second flat wire 20 and the third flat wire 30 are simultaneously inserted into the 2p×n conductor layer positions of the stator slots, and the two pins 1 are respectively inserted into the 2b stator slot group and the 2b-1 stator slot group of the same phase, the second flat wire 20 and the third flat wire 30 are alternately arranged in the 2p×n conductor layers, the pitch of the second flat wire 20 is y+1, and the pitch of the third flat wire 30 is Y-1.

The welding end of the pin 1 of the 2k-1 layer conductor layer inserted in the m stator slot of the a stator slot group of the flat wire positioned in the same phase is connected with the welding end of the pin 1 of the 2k layer conductor layer inserted in the m stator slot of the a+1 stator slot group of the other flat wire.

Thus, a second flat wire 20 connects the coil units of the 2P N-1 layer conductor layer having the second end located in the first slot of the 2b-1 th stator slot group in series with the coil units of the 2P N-1 layer conductor layer having the second end located in the second slot of the 2 b-th stator slot group to form the first short branch.

The other second flat wire 20 connects the coil unit of the 2p×n-1 layer conductor layer of the third slot of the 2b-1 th stator slot group with the coil unit of the 2p×n-1 layer conductor layer of the fourth slot of the 2 b-th stator slot group in series to form a second short branch.

A third flat wire 30 connects the coil unit of the 2P N-1 layer conductor layer having the second end located in the second slot of the 2b-1 th stator slot group in series with the coil unit of the 2P N-1 layer conductor layer having the second end located in the first slot of the 2 b-th stator slot group to form a third short branch.

The other third flat wire 30 connects the coil unit of the 2p×n-1 layer conductor layer of the fourth slot of the 2b-1 th stator slot group with the coil unit of the 2p×n-1 layer conductor layer of the third slot of the 2 b-th stator slot group at the second end in series to form a fourth short branch.

That is, after all the first, second and third flat wires 10, 20 and 30 are connected to each other, 4P short branches are formed in one phase, and the short branches extend from the 2 nd conductor layer in the stator slot to the 2p×n-1 conductor layer in the stator slot, pass through the second or third flat wire 20 or 30 positioned in the 2p×n conductor layer, and return to the 2 nd conductor layer from the 2p×n-1 conductor layer in the stator slot.

The pin 1 of the first flat wire 10 inserted in the 2 nd layer conductor layer of the first slot in the 2b+1 stator slot group forms a first end of the first short branch, and the pin 1 of the first flat wire 10 inserted in the 2 nd layer conductor layer of the second slot in the 2b+2 stator slot group forms a second end of the first short branch.

Pin 1 of the first flat wire 10 inserted in the 2 nd layer conductor layer of the third slot in the 2b+1 stator slot group forms the first end of the second short leg, and pin 1 of the first flat wire 10 inserted in the 2 nd layer conductor layer of the fourth slot in the 2b+2 stator slot group forms the second end of the second short leg.

Pin 1 of the first flat wire 10 of the 2 nd layer conductor layer inserted in the second slot in the 2b+1 stator slot group forms a first end of the third short leg, and pin 1 of the first flat wire 10 of the 2 nd layer conductor layer inserted in the first slot in the 2b+2 stator slot group forms a second end of the third short leg.

Pin 1 of the first flat wire 10 inserted in the 2 nd layer conductor layer of the fourth slot in the 2b+1 stator slot group forms a first end of a fourth short leg, and pin 1 of the first flat wire 10 inserted in the 2 nd layer conductor layer of the third slot in the 2b+2 stator slot group forms a second end of the fourth short leg.

The two pins 1 of the fourth flat wire 40, the fifth flat wire 50 and the sixth flat wire 60 are simultaneously inserted in the 1 st conductor layer position of the stator slot and are respectively positioned in the 2 b-th stator slot group and the 2b+1-th stator slot group of the same phase, the two pins 1 of the fourth flat wire 40 are inserted in the first slots of the two stator slot groups or the fourth slots of the two stator slot groups, the pitch of the fourth flat wire 40 is Y, the two pins 1 of the fifth flat wire 50 and the sixth flat wire 60 are respectively inserted in the second slots and the third slots of the two stator slot groups, the pitch of the fifth flat wire 50 is Y+1, and the pitch of the sixth flat wire 60 is Y-1.

Thus, a fourth flat wire 40 connects in series a first short leg of the 2 nd layer conductor layer having a first end located in the first slot of the 2b+1 stator slot group with a third short leg of the 2 nd layer conductor layer having a second end located in the first slot of the 2b+2 stator slot group.

Another fourth flat wire 40 connects in series a fourth short leg of the 2 nd layer conductor layer having a first end located in the fourth slot of the 2b+1 stator slot group with a second short leg of the 2 nd layer conductor layer having a second end located in the fourth slot of the 2b+2 stator slot group.

The fifth flat wire 50 connects in series a third short leg of the 2 nd layer conductor layer having a first end located in the second slot of the 2b+1 stator slot group with a fourth short leg of the 2 nd layer conductor layer having a second end located in the third slot of the 2b+2 stator slot group. The sixth flat wire 60 connects in series the second short leg of the 2 nd layer conductor layer of the third slot of the 2b+1 stator slot group with the first short leg of the 2 nd layer conductor layer of the second slot of the 2b+2 stator slot group at the first end.

That is, the second end of the first short leg is connected to the first end of the second short leg by the sixth flat wire 60, the second end of the second short leg is connected to the first end of the fourth short leg by the fourth flat wire 40, the second end of the fourth short leg is connected to the first end of the third short leg by the fifth flat wire 50, and the second end of the third short leg is connected to the first end of the first short leg by the fourth flat wire 40.

Thus, the fourth, fifth and sixth flat wires 40, 50 and 60 connect the four adjacent short legs in sequence, forming an endless leg that is connected end to end.

Wherein M, N, P, a, b, c, m, k is an integer, m is less than or equal to 4, and k is less than or equal to (P multiplied by N).

In summary, through the above arrangement, each phase winding forms P annular branches connected end to end, each branch has a breakpoint at the crown end or the welding end of the flat wire, and pins 1 at two ends of the breakpoint respectively form the start point and the end point of the branch. In other words, the pin 1 of any flat wire in each branch is not connected to the other pin 1 corresponding to the crown end or the welding end thereof, so that the two pins 1 form the start point and the end point of the branch respectively.

In some embodiments, the start point and the end point of the branch may be formed at the welding end of the flat wire, where the pin 1 of the flat wire corresponding to the v-th branch is inserted into the 2v+x-th stator slot group and 2v+x+1-th stator slot group of the x-th conductor layer. The pin 1 of the flat wire in which the (2v+2y) th slot of the (2 y) th stator slot group is inserted is formed as one of the start point and the end point of the (v) th branch, the pin 1 of the flat wire in which the (m) th slot of the (2v+2y) -1 th stator slot group is inserted is formed as the other of the start point and the end point of the (v) th branch, or the pin 1 of the flat wire in which the (2v+2y+1) th stator slot group is inserted is formed as one of the start point and the end point of the (v) th branch, and the pin 1 of the flat wire in which the (2 y) -1 th slot of the (2v+2y) th stator slot group is inserted is formed as the other of the start point and the end point of the (v) th branch. v, x and y are integers, v is less than or equal to P, x is less than or equal to 2P multiplied by N, and y is less than or equal to P multiplied by N.

In other embodiments, the start point and the end point of the branch may be formed at the crown end of the flat wire, and the crown end of any one of the flat wires corresponding to the branch may be disconnected.

That is, each phase winding includes P branches, each branch is connected end to end, and a pin 1 of any flat wire in each branch is not connected with another pin 1 corresponding to the crown end or the welding end of the flat wire, so that the two pins 1 respectively form a start point and an end point of the v branch.

For example, when p=3 and n=1, by the arrangement of the flat wires, each phase winding forms 3 end-to-end loop branches.

The pin 1 of the flat wire corresponding to the first branch is inserted into the 3 rd stator slot group and the 4 th stator slot group of the 1 st layer of conductor layer, the 4 th stator slot group and the 5 th stator slot group of the 2 nd layer of conductor layer, the 5 th stator slot group and the 6 th stator slot group of the 3 rd layer of conductor layer, the 6 th stator slot group and the 7 th stator slot group (the 7 th stator slot group is also the 1 st stator slot group) of the 4 th layer of conductor layer, the 7 th stator slot group and the 8 th stator slot group (the 8 th stator slot group is also the 2 nd stator slot group) of the 5 th layer of conductor layer, and the 8 th stator slot group and the 9 th stator slot group (the 9 th stator slot group is also the 3 rd stator slot group) of the 6 th layer of conductor layer.

The pin 1 of the flat wire corresponding to the second branch is inserted into the 5 th stator slot group and the 6 th stator slot group of the 1 st layer of conductor layer, the 6 th stator slot group and the 1 st stator slot group of the 2 nd layer of conductor layer, the 1 st stator slot group and the 2 nd stator slot group of the 3 rd layer of conductor layer, the 2 nd stator slot group and the 3 rd stator slot group of the 4 th layer of conductor layer, the 3 rd stator slot group and the 4 th stator slot group of the 5 th layer of conductor layer, and the 4 th stator slot group and the 5 th stator slot group of the 6 th layer of conductor layer.

The pin 1 of the flat wire corresponding to the third branch is inserted into the 1 st stator slot group and the 2 nd stator slot group of the 1 st layer of conductor layer, the 2 nd stator slot group and the 3 rd stator slot group of the 2 nd layer of conductor layer, the 3 rd stator slot group and the 4 th stator slot group of the 3 rd layer of conductor layer, the 4 th stator slot group and the 5 th stator slot group of the 4 th layer of conductor layer, the 5 th stator slot group and the 6 th stator slot group of the 5 th layer of conductor layer, and the 6 th stator slot group and the 1 st stator slot group of the 6 th layer of conductor layer.

The starting point and the end point of the three branches can be formed at the welding end of the flat wire at the same time, wherein the welding end of the pin 1 of one flat wire inserted in the m-th slot of the 2+2y-th stator slot group of the 2 y-th layer conductor layer in the first branch is not connected with the welding end of the pin 1 of the other flat wire inserted in the m-th slot of the 2+2y-1-th stator slot group of the 2 y-1-th layer conductor layer, and the pins 1 at the two ends of the break point are respectively formed as the starting point and the end point of the first branch.

The welding end of the pin 1 of one flat wire inserted in the m-th slot of the 4+2y stator slot group of the 2 y-th layer conductor layer is not connected with the welding end of the pin 1 of the other flat wire inserted in the m-th slot of the 4+2y-1 stator slot group of the 2y-1 th layer conductor layer, and the pins 1 at the two ends of the break point are respectively formed into a starting point and a terminal point of the first branch.

The welding end of the pin 1 of one flat wire inserted in the m-th slot of the 6+2y stator slot group of the 2 y-th layer conductor layer is not connected with the welding end of the pin 1 of the other flat wire inserted in the m-th slot of the 6+2y-1 stator slot group of the 2y-1 th layer conductor layer, and the pins 1 at the two ends of the break point are respectively formed into a starting point and a terminal point of the first branch.

The starting points and the ending points of the three branches can be formed at the crown end of the flat wire at the same time, the crown end of any flat wire in one branch is disconnected, and pins 1 at the two ends of the breakpoint are respectively formed as the starting points and the ending points of the branches.

For example, in the first branch, the welding end of the pin 1 of the flat wire inserted in the 1 st slot of the 4 th stator slot group of the 2 nd conductor layer is not connected to the pin 1 of the flat wire inserted in the 1 st slot of the 3 rd stator slot group of the first conductor layer, the welding end of the pin 1 of the flat wire inserted in the 1 st slot of the 4 th stator slot group of the 2 nd conductor layer is formed as the start point of the first branch, and the welding end of the pin 1 of the flat wire inserted in the 1 st slot of the 3 rd stator slot group of the first conductor layer is formed as the end point of the first branch.

For example, in the first branch, the crown ends of the flat wires inserted in the 3 rd slot of the 2 nd layer conductor layer sixth stator slot group and the 3 rd slot position of the 3 rd layer conductor layer 1 st stator slot group of the two pins 1 are disconnected, the crown ends of the pin 1 of the 3 rd slot flat wire inserted in the 2 nd layer conductor layer sixth stator slot group of the stator slot are formed as the start point of the first branch, and the crown ends of the pin 1 of the 3 rd layer conductor layer inserted in the 3 rd slot position of the 1 st stator slot group are formed as the end point of the first branch.

There are also various locations where the start point and the end point exist in the first branch, which are not limited herein.

In other embodiments, a plurality of equidistant break points may exist on the branches connected end to end, so as to form a plurality of branches respectively, and two ends of the break point form the start point or the end point of any two branches respectively.

Through the arrangement mode of the stator windings, the stator windings can be suitable for the situation that the number of slots of each phase of each pole is 4, the number of branches is 3 and the like, and the stator windings are not easy to arrange.

According to the motor stator provided by the embodiment of the invention, the connection mode of the stator winding of the motor stator has a wide application range, and the sum of the distribution of each branch at each pole is equal, so that the electric potential sum of each branch is ensured to be equal, and the generation of circulation is avoided.

According to some embodiments of the present invention, as shown in fig. 1, the lead-in end and the lead-out end of the P branches are located at the crown end or the welding end of the flat wire at the same time, so as to facilitate connection between the branches, and facilitate overall arrangement of the motor.

In some embodiments, the pins 1 corresponding to the lead-in ends of the P branches are located in the same stator slot and/or the pins 1 corresponding to the lead-out ends of the P branches are located in the same stator slot. Therefore, the motor has a more regular overall structure, is convenient for the production and processing of the motor, ensures that the positions of the lead-in end and the lead-out end are more advanced, and is convenient for series connection or parallel connection between the branches.

In some embodiments, the lead-in and lead-out ends of the P branches are located at the welding ends of the flat wire, the pins 1 corresponding to the lead-in ends of the P branches are located at the same stator slot and the pins 1 corresponding to the lead-out ends of the P branches are also located at the same stator slot.

The lead-in ends of the three branches can be located in the 1 st slot of the first stator slot group at the same time, the lead-out ends of the three branches can be located in the first slot of the second stator slot group at the same time, the welding ends of the pins 1 of the flat wires of the 1 st conductor layer inserted in the first slot of the first stator slot group are formed into the lead-in ends of the first branch, the welding ends of the pins 1 of the flat wires of the 3 rd conductor layer inserted in the first slot of the first stator slot group are formed into the lead-in ends of the 2 nd branch, and the welding ends of the pins 1 of the flat wires of the 5 th conductor layer inserted in the first slot of the first stator slot group are formed into the lead-in ends of the 3 rd branch.

Further, the welded end of the pin 1 of the flat wire inserted in the 2 nd conductor layer of the first slot of the second stator slot group is formed as the lead-out end of the first branch, the welded end of the pin 1 of the flat wire inserted in the 4 th conductor layer of the first slot of the second stator slot group is formed as the lead-out end of the 2 nd branch, and the welded end of the pin 1 of the flat wire inserted in the 6 th conductor layer of the first slot of the second stator slot group is formed as the lead-out end of the 3 rd branch.

In other embodiments, the lead-in end and the lead-out end of the P branches are located at the welding end of the flat wire, the pins 1 corresponding to the lead-in end of the P branches are located in the same stator slot, the pins 1 corresponding to the lead-out end of the P branches are respectively located in two different stator slots, or the pins 1 corresponding to the lead-out end of the P branches are located in the same stator slot, and the pins 1 corresponding to the lead-in end of the P branches are respectively located in two different stator slots.

The leading-in ends of the three branches can be simultaneously positioned in the second groove of the second stator groove group, and the leading-out ends of the three branches can be respectively positioned in the second groove of the third stator groove group and the second groove of the first stator groove group.

For example, the welded end of the pin 1 of the flat wire inserted in the 1 st conductor layer of the second slot of the 2 nd stator slot group is formed as the lead-in end of the first branch, the welded end of the pin 1 of the flat wire inserted in the 4 th conductor layer of the 2 nd slot of the 2 nd stator slot group is formed as the lead-in end of the 2 nd branch, and the welded end of the pin 1 of the flat wire inserted in the 5 th conductor layer of the 2 nd slot of the 2 nd stator slot group is formed as the lead-in end of the 3 rd branch.

Further, the welded end of the pin 1 of the flat wire inserted in the 2 nd conductor layer of the 2 nd slot of the 3 rd stator slot group is formed as the lead-out end of the first branch, the welded end of the pin 1 of the flat wire inserted in the 3 rd conductor layer of the 2 nd slot of the 1 st stator slot group is formed as the lead-out end of the 2 nd branch, and the welded end of the pin 1 of the flat wire inserted in the 6 th conductor layer of the 2 nd slot of the 3 rd stator slot group is formed as the lead-out end of the 3 rd branch.

In some embodiments, the lead-in end and the lead-out end of the P branches are located at the crown end of the flat wire, the pins 1 corresponding to the lead-in ends of the P branches are located in the same stator slot, and at this time, the pins 1 corresponding to the lead-out ends of the P branches are located in the same or different stator slots according to the disconnection of the flat wire.

In other embodiments, the lead-in end and the lead-out end of the P branches are located at the crown end of the flat wire, the pins 1 corresponding to the lead-in ends of the P branches are located in the same stator slot, the pins 1 corresponding to the lead-out ends of the P branches are also located in the same stator slot, for example, two pins 1 in one branch are respectively inserted into the 2b th stator slot group and the 2b+1 th stator slot group of the same phase and are simultaneously inserted into the crown end of the flat wire of the first slot or the fourth slot of the corresponding stator slot group, and the lead-in parts on both sides of the break point are formed as the lead-in ends and the lead-out ends of the branches, so that the pins 1 corresponding to the lead-in ends and the lead-out ends of each branch are located in the same stator slot.

Wherein, two pins 1 in the three branches are respectively inserted into the crown ends of flat wires arranged in the fourth slot of the 4 th stator slot group and the fourth slot of the 5 th stator slot group to be disconnected, wherein, the crown end of the pin 1 of the 1 st layer conductor layer positioned in the fourth slot of the 4 th stator slot group is formed as the leading-in end of the first branch, the crown end of the pin 1 of the 2 nd layer conductor layer positioned in the fourth slot of the 4 th stator slot group is formed as the leading-in end of the 2 nd branch, and the crown end of the pin 1 of the 4 th layer conductor layer positioned in the fourth slot of the 4 th stator slot group is formed as the leading-in end of the 3 rd branch.

Further, the crown end of the pin 1 of the 1 st layer conductor layer positioned in the fourth slot of the 5 th stator slot group is formed as the lead-out end of the first branch, the crown end of the pin 1 of the 3 rd layer conductor layer positioned in the fourth slot of the 5 th stator slot group is formed as the lead-out end of the 2 nd branch, and the crown end of the pin 1 of the 5 th layer conductor layer positioned in the fourth slot of the 5 th stator slot group is formed as the lead-out end of the 3 rd branch.

In some embodiments, the lead-in end and the lead-out end of the P branches are located at the crown end of the flat wire, the pins 1 corresponding to the lead-in ends of the P branches are located in the same stator slot, and the pins 1 corresponding to the lead-out ends of the P branches are located in different stator slots.

For example, two pins 1 are respectively inserted into the 2 b-th stator slot group and the 2b+1-th stator slot group of the same phase in one branch, and the crown end of the flat wire inserted into the second slot or the third slot of the 2 b-th stator slot group is disconnected, the lead parts on two sides of the break point are formed into a lead-in end and a lead-out end of the branch, at this time, the pins 1 corresponding to the lead-in end of each branch are located in the same stator slot, and the pins 1 corresponding to the lead-out end of each branch are located in different stator slots.

Wherein, two pins 1 in the three branches are respectively inserted into the second slot of the 4 th stator slot group and the second slot of the 5 th stator slot group or the crown end of the flat wire of the third slot is disconnected, wherein, the crown end of the pin 1 of the 1 st layer conductor layer positioned in the second slot of the 4 th stator slot group is formed as the leading-in end of the first branch, the crown end of the pin 1 of the 2 nd layer conductor layer positioned in the second slot of the 4 th stator slot group is formed as the leading-in end of the 2 nd branch, and the crown end of the pin 1 of the 4 th layer conductor layer positioned in the second slot of the 4 th stator slot group is formed as the leading-in end of the 3 rd branch.

Further, the crown end of the pin 1 of the 1 st layer conductor layer positioned in the third slot of the 5 th stator slot group is formed as the lead-out end of the first branch, the crown end of the pin 1 of the 3 rd layer conductor layer positioned in the second slot of the 5 th stator slot group is formed as the lead-out end of the 2 nd branch, and the crown end of the pin 1 of the 5 th layer conductor layer positioned in the second slot of the 5 th stator slot group is formed as the lead-out end of the 3 rd branch.

For example, two pins 1 are respectively inserted into the 2 b-th stator slot group and the 2 b-1-th stator slot group of the same phase in one branch, the crown ends of the flat wires are disconnected, one pin 1 of the flat wires is positioned in the same stator slot, and the lead parts at two sides of the break point are formed into a lead-in end and a lead-out end of the branch, so that the pins 1 corresponding to the lead-in ends of the branches are positioned in the same stator slot.

Wherein, two pins 1 in the three branches are respectively inserted into the third slot of the 4 th stator slot group and the crown end of the flat wire of the 3 rd stator slot group to be disconnected, wherein, the crown end of the pin 1 of the 3 rd layer conductor layer positioned in the third slot of the 4 th stator slot group is formed as the leading-in end of the first branch, the crown end of the pin 1 of the 5 th layer conductor layer positioned in the third slot of the 4 th stator slot group is formed as the leading-in end of the 2 nd branch, and the crown end of the pin 1 of the 6 th layer conductor layer positioned in the third slot of the 4 th stator slot group is formed as the leading-in end of the 3 rd branch.

Further, the crown end of the pin 1 of the 2 nd layer conductor layer positioned in the third slot of the 3 rd stator slot group is formed as the lead-out end of the first branch, the crown end of the pin 1 of the 4 th layer conductor layer positioned in the third slot of the 3 rd stator slot group is formed as the lead-out end of the 2 nd branch, and the crown end of the pin 1 of the 6 th layer conductor layer positioned in the fourth slot of the 3 rd stator slot group is formed as the lead-out end of the 3 rd branch.

According to other embodiments of the present invention, the lead-in end and the lead-out end of the P branches are located at the crown end or the welding end of the flat wire at the same time, so as to facilitate connection between the branches and facilitate overall arrangement of the motor.

And, the pins 1 corresponding to the leading-in ends of the P branches are positioned on the same conductor layer and/or the pins 1 corresponding to the leading-out ends of the P branches are positioned on the same conductor layer. Therefore, the motor has a more regular overall structure, is convenient for the production and processing of the motor, ensures that the positions of the lead-in end and the lead-out end are more advanced, and is convenient for series connection or parallel connection between the branches.

In some embodiments, the lead-in and lead-out of the P branches are located at the welding end of the flat wire, the pins 1 corresponding to the lead-in of the P branches are located at the same conductor layer and the pins 1 corresponding to the lead-out of the P branches are also located at the same conductor layer. The leading-in ends of the P branches can be located at the 2 y-layer conductor layer at the same time, and the leading-out ends of the three branches can be located at the 2 y-1-layer conductor layer at the same time.

In other embodiments, the lead-in end and the lead-out end of the P branches are located at the crown end of the flat wire, and the pin 1 corresponding to the lead-in end of the P branches and the pin 1 corresponding to the lead-out end of the P branches are located at the same conductor layer at the same time. The lead-in end and the lead-out end of the P branches can be located at the 1 st layer of conductor layer at the same time, or the lead-in end and the lead-out end of the P branches can be located at the 2p×n layer of conductor layer at the same time. At this time, the crown end of one second flat wire 20 or one third flat wire 30 in each branch is disconnected, or at this time, the crown end of one fourth flat wire 40 or one fifth flat wire 50 or one sixth flat wire 60 in each branch is disconnected, so that the two pins 1 of the flat wire form the starting point and the ending point of the branch respectively.

In still other embodiments, the lead-in and lead-out ends of the P branches are located at the crown end of the flat wire, and the pin 1 corresponding to the lead-in end of the P branches and the pin 1 corresponding to the lead-out end of the P branches are located at two adjacent conductor layers at the same time. The leading-in ends of the P branches can be located at the 2y layer conductor layer at the same time, and the leading-out ends of the P branches can be located at the 2y+1 layer conductor layer at the same time. At this time, two pins 1 in each branch are respectively located at the crown ends of the first flat wire 10 of the 2 y-th layer conductor layer and the 2y+1-th layer conductor layer, so that the two pins 1 of the flat wire respectively form the start point and the end point of the branch.

Referring to fig. 2 to 4, the flat wire includes: the two pins 1 and the crown 2, the pins 1 are used for being inserted into the stator slots to form conductor layers, the crown 2 is connected between the two pins 1, the crown 2 is in an outer convex shape, and the outer convex crown 2 can facilitate arrangement and installation of flat wires. One end of the pin 1, which is far away from the crown 2, forms a welding part 11, the welding part 11 is positioned at the welding end of the flat wire, and the crown 2 is positioned at the crown end of the flat wire.

According to some embodiments of the present invention, the crown 2 of each flat wire of the stator winding is located at one side of the outer end of the stator slot of the stator core, and the welding portion 11 is located at the other side of the outer end of the stator slot, so that the overall structure of the stator winding is more regular, and the installation and welding of the stator winding are facilitated.

As shown in fig. 2, the soldered portions 11 of the first flat wire 10 on both sides extend obliquely in a direction away from each other in the extending direction of the pin 1 so that the soldered portions 11 on one side are soldered to the soldered portions 11 of the pin 1 in the stator slot group adjacent to the one side.

Referring to fig. 3, the welding parts 11 of the second and third flat wires 20 and 30 located at both sides extend obliquely in a second direction opposite to the first direction in the extending direction of the pin 1 so that the stator winding can be turned in the second direction by the second flat wire 20.

As shown in fig. 4, the welded portions 11 of the fourth, fifth, and sixth flat wires 40, 50, and 60 on both sides extend obliquely in the first direction in the extending direction of the pin 1, so that the stator winding can be turned in the first direction by the third and fourth flat wires 30 and 40.

In some embodiments, two flat wires adjacent in the winding direction are welded to each other by a weld 11 to facilitate the installation of the stator winding.

According to some embodiments of the present invention, the P branches included in each phase winding may be connected in series or parallel, or the multiple branches may be connected in parallel after being connected in series, so as to make the arrangement of the stator winding more universal.

According to some embodiments of the present invention, as shown in fig. 1, the stator winding includes 3 phases, each corresponding to 6 stator slot groups, each phase winding includes 3 branches, and by the arrangement manner of the stator windings, one phase and three branches can be realized under the condition that the slot number of each phase of each pole is 4.

A specific embodiment of the invention is described with reference to fig. 1.

As shown in fig. 1, the stator core has 72 stator slots arranged in the circumferential direction thereof, each adjacent four stator slots form a stator slot group, the stator winding includes 3 phases, each corresponding 6 stator slot groups, the stator winding is arranged in the circumferential direction of the stator core in a penetrating manner in a plurality of stator slots and forms 6 conductor layers in the radial direction of the stator core, and each phase winding includes 3 branches.

As shown in fig. 1, taking one phase as an example, the arrangement of the three branches of the phase in the stator slot is described.

Two pins 1 of the 24 th flat wire of the first branch are inserted into the positions of the 2 nd layer conductor layer of the second slot of the 2 nd stator slot group and the 3 rd layer conductor layer of the second slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 23 rd flat wire of the first branch are inserted into the positions of the 4 th layer conductor layer of the second slot of the 4 th stator slot group and the 5 th layer conductor layer of the second slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 22 nd flat wire of the first branch are inserted into the 6 th layer conductor layer of the second slot of the 6 th stator slot group and the 6 th layer conductor layer of the first slot of the 1 st stator slot group, and the flat wire is a third flat wire 30.

Two pins 1 of the 21 st flat wire of the first branch are inserted into the 5 th layer conductor layer of the first slot of the 6 th stator slot group and the 4 th layer conductor layer of the first slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 20 th flat wire of the first branch are inserted into the positions of the 3 rd layer conductor layer of the first slot of the 4 th stator slot group and the 2 nd layer conductor layer of the first slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 19 th flat wire of the first branch are inserted into the 1 st layer conductor layer of the first slot of the 2 nd stator slot group and the 1 st layer conductor layer of the first slot of the 1 st stator slot group, and the flat wire is a fourth flat wire 40.

Two pins 1 of the 18 th flat wire of the first branch are inserted into the positions of the 2 nd layer conductor layer of the first slot of the 2 nd stator slot group and the 3 rd layer conductor layer of the first slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 17 th flat wire of the first branch are inserted into the positions of the 4 th layer conductor layer of the first slot of the 4 th stator slot group and the 5 th layer conductor layer of the first slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 16 th flat wire of the first branch are inserted into the 6 th layer conductor layer of the first slot of the 6 th stator slot group and the 6 th layer conductor layer of the second slot of the 1 st stator slot group, and the flat wire is the second flat wire 20.

Two pins 1 of the 15 th flat wire of the first branch are inserted into the 5 th layer conductor layer of the second slot of the 6 th stator slot group and the 4 th layer conductor layer of the second slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 14 th flat wire of the first branch are inserted into the positions of the 3 rd layer conductor layer of the second slot of the 4 th stator slot group and the 2 nd layer conductor layer of the second slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 13 th flat wire of the first branch are inserted into the 1 st layer conductor layer of the second slot of the 2 nd stator slot group and the 1 st layer conductor layer of the third slot of the 1 st stator slot group, and the flat wire is a sixth flat wire 60.

Two pins 1 of the 12 th flat wire of the first branch are inserted into the positions of the 2 nd layer conductor layer of the third slot of the 2 nd stator slot group and the 3 rd layer conductor layer of the third slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 11 th flat wire of the first branch are inserted into the positions of the 4 th layer conductor layer of the third slot of the 4 th stator slot group and the 5 th layer conductor layer of the third slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 10 th flat wire of the first branch are inserted into the 6 th layer conductor layer of the third slot of the 6 th stator slot group and the 6 th layer conductor layer of the fourth slot of the 1 st stator slot group, and the flat wire is the second flat wire 20.

Two pins 1 of the 9 th flat wire of the first branch are inserted into the 5 th layer conductor layer of the fourth slot of the 6 th stator slot group and the 4 th layer conductor layer of the fourth slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 8 th flat wire of the first branch are inserted into the positions of the 3 rd layer conductor layer of the fourth slot of the 4 th stator slot group and the 2 nd layer conductor layer of the fourth slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 7 th flat wire of the first branch are inserted into the 1 st layer conductor layer of the fourth slot of the 2 nd stator slot group and the 1 st layer conductor layer of the fourth slot of the 1 st stator slot group, and the flat wire is a fourth flat wire 40.

Two pins 1 of the 6 th flat wire of the first branch are inserted into the positions of the 2 nd layer conductor layer of the fourth slot of the 2 nd stator slot group and the 3 rd layer conductor layer of the fourth slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 5 th flat wire of the first branch are inserted into the positions of the 4 th layer conductor layer of the fourth slot of the 4 th stator slot group and the 5 th layer conductor layer of the fourth slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 4 th flat wire of the first branch are inserted into the 6 th layer conductor layer of the fourth slot of the 6 th stator slot group and the 6 th layer conductor layer of the third slot of the 1 st stator slot group, and the flat wire is the third flat wire 30.

Two pins 1 of the 3 rd flat wire of the first branch are inserted into the 5 th layer conductor layer of the third slot of the 6 th stator slot group and the 4 th layer conductor layer of the third slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 2 nd flat wire of the first branch are inserted into the positions of the 3 rd layer conductor layer of the third slot of the 4 th stator slot group and the 2 nd layer conductor layer of the third slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 1 st flat wire of the first branch are inserted into the 1 st layer conductor layer of the third slot of the 2 nd stator slot group and the 1 st layer conductor layer of the second slot of the 1 st stator slot group, and the flat wire is a fifth flat wire 50.

The flat wires are sequentially welded and connected according to the sequence, a pin 1 in a 2 nd layer conductor layer inserted in a second groove of a 2 nd stator groove group of the 24 th flat wire is not connected with a pin 1 in a 1 st layer conductor layer position inserted in a second groove of a 1 st stator groove group of the 1 st flat wire, a lead-in end of a first branch is formed at a welding end of the pin 1 in the 1 st layer conductor layer inserted in the second groove of the 1 st stator groove group, and a lead-out end of the first branch is formed at a welding end of the pin 1 inserted in the 2 nd layer conductor layer of the second groove of the 2 nd stator groove group of the 24 th flat wire.

Two pins 1 of the 24 th flat wire of the second branch are inserted into the 1 st layer conductor layer of the second slot of the 6 th stator slot group and the 1 st layer conductor layer of the third slot of the 5 th stator slot group, and the flat wire is a sixth flat wire 60.

Two pins 1 of the 23 rd flat wire of the second branch are inserted into the positions of the 2 nd layer conductor layer of the third slot of the 6 th stator slot group and the 3 rd layer conductor layer of the third slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 22 nd flat wire of the second branch are inserted into the positions of the 4 th layer conductor layer of the third slot of the 2 nd stator slot group and the 5 th layer conductor layer of the third slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 21 st flat wire of the second branch are inserted into the 6 th layer conductor layer of the third slot of the 4 th stator slot group and the 6 th layer conductor layer of the fourth slot of the 5 th stator slot group, and the flat wire is the second flat wire 20.

Two pins 1 of the 20 th flat wire of the second branch are inserted into the positions of the 5 th layer conductor layer of the fourth slot of the 4 th stator slot group and the 4 th layer conductor layer of the fourth slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 19 th flat wire of the second branch are inserted into the positions of the 3 rd layer conductor layer of the fourth slot of the 2 nd stator slot group and the 2 nd layer conductor layer of the fourth slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 18 th flat wire of the second branch are inserted into the positions of the 1 st layer conductor layer of the fourth slot of the 6 th stator slot group and the 1 st layer conductor layer of the fourth slot of the 5 th stator slot group, and the flat wire is a fourth flat wire 40.

Two pins 1 of the 17 th flat wire of the second branch are inserted into the positions of the 2 nd layer conductor layer of the fourth slot of the 6 th stator slot group and the 3 rd layer conductor layer of the fourth slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 16 th flat wire of the second branch are inserted into the positions of the 4 th layer conductor layer of the fourth slot of the 2 nd stator slot group and the 5 th layer conductor layer of the fourth slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 15 th flat wire of the second branch are inserted into the 6 th layer conductor layer of the fourth slot of the 4 th stator slot group and the 6 th layer conductor layer of the third slot of the 5 th stator slot group, and the flat wire is the third flat wire 30.

Two pins 1 of the 14 th flat wire of the second branch are inserted into the 5 th layer conductor layer of the third slot of the 4 th stator slot group and the 4 th layer conductor layer of the third slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 13 th flat wire of the second branch are inserted into the positions of the 3 rd layer conductor layer of the third slot of the 2 nd stator slot group and the 2 nd layer conductor layer of the third slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 12 th flat wire of the second branch are inserted into the 1 st layer conductor layer of the third slot of the 6 th stator slot group and the 1 st layer conductor layer of the second slot of the 5 th stator slot group, and the flat wire is a fifth flat wire 50.

Two pins 1 of the 11 th flat wire of the second branch are inserted into the positions of the 2 nd layer conductor layer of the second slot of the 6 th stator slot group and the 3 rd layer conductor layer of the second slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 10 th flat wire of the second branch are inserted into the positions of the 4 th layer conductor layer of the second slot of the 2 nd stator slot group and the 5 th layer conductor layer of the second slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 9 th flat wire of the second branch are inserted into the 6 th layer conductor layer of the second slot of the 4 th stator slot group and the 6 th layer conductor layer of the first slot of the 5 th stator slot group, and the flat wire is a third flat wire 30.

Two pins 1 of the 8 th flat wire of the second branch are inserted into the 5 th layer conductor layer of the first slot of the 4 th stator slot group and the 4 th layer conductor layer of the first slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 7 th flat wire of the second branch are inserted into the positions of the 3 rd layer conductor layer of the first slot of the 2 nd stator slot group and the 2 nd layer conductor layer of the first slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 6 th flat wire of the second branch are inserted into the 1 st layer conductor layer of the first slot of the 6 th stator slot group and the 1 st layer conductor layer of the first slot of the 5 th stator slot group, and the flat wire is a fourth flat wire 40.

Two pins 1 of the 5 th flat wire of the second branch are inserted into the positions of the 2 nd layer conductor layer of the first slot of the 6 th stator slot group and the 3 rd layer conductor layer of the first slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 4 th flat wire of the second branch are inserted into the positions of the 4 th layer conductor layer of the first slot of the 2 nd stator slot group and the 5 th layer conductor layer of the first slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 3 rd flat wire of the second branch are inserted into the 6 th layer conductor layer of the first slot of the 4 th stator slot group and the 6 th layer conductor layer of the second slot of the 5 th stator slot group, and the flat wire is the second flat wire 20.

Two pins 1 of the 2 nd flat wire of the second branch are inserted into the 5 th layer conductor layer of the second slot of the 4 th stator slot group and the 4 th layer conductor layer of the second slot of the 3 rd stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 1 st flat wire of the second branch are inserted into the positions of the 3 rd layer conductor layer of the second slot of the 2 nd stator slot group and the 2 nd layer conductor layer of the second slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

The flat wires are sequentially welded and connected according to the sequence, a pin 1 in a 1 st layer conductor layer inserted in a second groove of a 6 th stator groove group of the 24 th flat wire is not connected with a pin 1 in a 2 nd layer conductor layer inserted in a second groove of the 1 st stator groove group of the 1 st flat wire, a lead-in end of a second branch is formed at a welding end of the pin 1 in the 2 nd layer conductor layer inserted in the second groove of the 1 st stator groove group, and a lead-out end of the second branch is formed at a welding end of the pin 1 inserted in the 1 st layer conductor layer of the second groove of the 6 th stator groove group of the 24 th flat wire.

Two pins 1 of the 24 th flat wire of the third branch are inserted into the positions of the 3 rd layer conductor layer of the second slot of the 6 th stator slot group and the 2 nd layer conductor layer of the second slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 23 rd flat wire of the third branch are inserted into the 1 st layer conductor layer of the second slot of the 4 th stator slot group and the 1 st layer conductor layer of the third slot of the 3 rd stator slot group, and the flat wire is a sixth flat wire 60.

Two pins 1 of the 22 nd flat wire of the third branch are inserted into the positions of the 2 nd layer conductor layer of the third slot of the 4 th stator slot group and the 3 rd layer conductor layer of the third slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 21 st flat wire of the third branch are inserted into the positions of the 4 th layer conductor layer of the third slot of the 6 th stator slot group and the 5 th layer conductor layer of the third slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 20 th flat wire of the third branch are inserted into the 6 th layer conductor layer of the third slot of the 2 nd stator slot group and the 6 th layer conductor layer of the fourth slot of the 3 rd stator slot group, and the flat wire is the second flat wire 20.

Two pins 1 of the 19 th flat wire of the third branch are inserted into the 5 th layer conductor layer of the fourth slot of the 2 nd stator slot group and the 4 th layer conductor layer of the fourth slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 18 th flat wire of the third branch are inserted into the positions of the 3 rd layer conductor layer of the fourth slot of the 6 th stator slot group and the 2 nd layer conductor layer of the fourth slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 17 th flat wire of the third branch are inserted into the 1 st layer conductor layer of the fourth slot of the 4 th stator slot group and the 1 st layer conductor layer of the fourth slot of the 3 rd stator slot group, and the flat wire is a fourth flat wire 40.

Two pins 1 of the 16 th flat wire of the third branch are inserted into the positions of the 2 nd layer conductor layer of the fourth slot of the 4 th stator slot group and the 3 rd layer conductor layer of the fourth slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 15 th flat wire of the third branch are inserted into the positions of the 4 th layer conductor layer of the fourth slot of the 6 th stator slot group and the 5 th layer conductor layer of the fourth slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 14 th flat wire of the third branch are inserted into the 6 th layer conductor layer of the fourth slot of the 2 nd stator slot group and the 6 th layer conductor layer of the third slot of the 3 rd stator slot group, and the flat wire is the third flat wire 30.

Two pins 1 of the 13 th flat wire of the third branch are inserted into the 5 th layer conductor layer of the third slot of the 2 nd stator slot group and the 4 th layer conductor layer of the third slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 12 th flat wire of the third branch are inserted into the positions of the 3 rd layer conductor layer of the third slot of the 6 th stator slot group and the 2 nd layer conductor layer of the third slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 11 th flat wire of the third branch are inserted into the positions of the 1 st layer conductor layer of the third slot of the 4 th stator slot group and the 1 st layer conductor layer of the second slot of the 3 rd stator slot group, and the flat wire is a fifth flat wire 50.

Two pins 1 of the 10 th flat wire of the third branch are inserted into the positions of the 2 nd layer conductor layer of the second slot of the 4 th stator slot group and the 3 rd layer conductor layer of the second slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 9 th flat wire of the third branch are inserted into the positions of the 4 th layer of conductor layer of the second slot of the 6 th stator slot group and the 5 th layer of conductor layer of the second slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 8 th flat wire of the third branch are inserted into the 6 th layer conductor layer of the second slot of the 2 nd stator slot group and the 6 th layer conductor layer of the first slot of the 3 rd stator slot group, and the flat wire is the third flat wire 30.

Two pins 1 of the 7 th flat wire of the third branch are inserted into the 5 th layer conductor layer of the first slot of the 2 nd stator slot group and the 4 th layer conductor layer of the first slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 6 th flat wire of the third branch are inserted into the positions of the 3 rd layer conductor layer of the first slot of the 6 th stator slot group and the 2 nd layer conductor layer of the first slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 5 th flat wire of the third branch are inserted into the 1 st layer conductor layer of the first slot of the 4 th stator slot group and the 1 st layer conductor layer of the first slot of the 3 rd stator slot group, and the flat wire is a fourth flat wire 40.

Two pins 1 of the 4 th flat wire of the third branch are inserted into the positions of the 2 nd layer conductor layer of the first slot of the 4 th stator slot group and the 3 rd layer conductor layer of the first slot of the 5 th stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 3 rd flat wire of the third branch are inserted into the 4 th layer conductor layer of the first slot of the 6 th stator slot group and the 5 th layer conductor layer of the first slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

Two pins 1 of the 2 nd flat wire of the third branch are inserted into the 6 th layer conductor layer of the first slot of the 2 nd stator slot group and the 6 th layer conductor layer of the second slot of the 3 rd stator slot group, and the flat wire is the second flat wire 20.

Two pins 1 of the 1 st flat wire of the third branch are inserted into the 5 th layer conductor layer of the second slot of the 2 nd stator slot group and the 4 th layer conductor layer of the second slot of the 1 st stator slot group, and the flat wire is the first flat wire 10.

The flat wires are sequentially welded and connected according to the sequence, a pin 1 in a 3 rd layer conductor layer inserted in a second groove of a 6 th stator groove group of the 24 th flat wire is not connected with a pin 1 in a 4 th layer conductor layer inserted in a second groove of a 1 st stator groove group of the 1 st flat wire, a lead-in end of a third branch is formed at a welding end of the pin 1 in the 4 th layer conductor layer inserted in the second groove of the 1 st stator groove group, and a lead-out end of the third branch is formed at a welding end of the pin 1 inserted in the 3 rd layer conductor layer of the second groove of the 6 th stator groove group of the 24 th flat wire.

The motor according to the embodiment of the present invention includes the motor stator according to the above-described embodiment. In the motor, the motor stator is adopted, so that the motor performance is better.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Other constructions of the motor are well known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The stator of the motor is characterized by comprising a stator core and a stator winding, wherein the stator core is provided with a plurality of stator slots which are circumferentially distributed, each adjacent four stator slots form a stator slot group, the stator winding comprises M phases, each phase winding occupies one stator slot group, each corresponding 2P stator slot groups, the ratio of the number of slots of the stator slots to the number of poles of the motor, which are formed by the stator core, is Y, the stator winding penetrates through the plurality of stator slots along the circumferential direction of the stator core and forms a 2P multiplied by N conductor layer along the radial direction of the stator core, each corresponding stator slot group is arranged along a first direction, the stator slots in each stator slot group are arranged along the first direction,

2. The motor stator according to claim 1, wherein the lead-in end and the lead-out end of the P branches are located at the crown end or the welding end of the flat wire at the same time, and pins corresponding to the lead-in ends of the P branches are located in the same stator slot and/or pins corresponding to the lead-out ends of the P branches are located in the same stator slot.

3. The motor stator according to claim 1, wherein the lead-in end and the lead-out end of the P branches are located at the crown end or the welding end of the flat wire at the same time, and pins corresponding to the lead-in ends of the P branches are located at the same conductor layer and/or pins corresponding to the lead-out ends of the P branches are located at the same conductor layer.

4. The motor stator according to claim 1, wherein the flat wire includes:

two pins, which are used for being inserted into the stator slots to form the conductor layer;

The crown part is connected between the two pins and is in an outward convex shape;

and one end of the pin, which is far away from the crown part, forms a welding part.

5. The motor stator according to claim 4, wherein the crown portion of each flat wire of the stator winding is located on one side of the stator slot outer end of the stator core, and the welding portion is located on the other side of the stator slot outer end.

6. The motor stator according to claim 4, wherein the welded portions of the first flat wire on both sides extend obliquely in a direction away from each other in an extending direction of the lead, the welded portions of the second flat wire and the third flat wire on both sides extend obliquely in a second direction opposite to the first direction in the extending direction of the lead, and the welded portions of the fourth flat wire, the fifth flat wire, and the sixth flat wire on both sides extend obliquely in the first direction in the extending direction of the lead.

7. The motor stator according to claim 4, wherein two of the flat wires adjacent in the winding direction are welded to each other by the weld.

8. The motor stator of claim 1 wherein the stator windings comprise 3 phases, each corresponding 6 stator slot sets, each phase winding comprising 3 legs.

9. An electric motor stator according to claim 1, characterized in that said P branches of each phase winding can be connected in series or in parallel with each other, or in that a plurality of branches are connected in series and then in parallel with each other.

10. An electric machine comprising an electric machine stator as claimed in any one of claims 1-9.