Stator winding and motor

Abstract

The utility model discloses a stator winding and a motor, the stator winding comprises a plurality of flat wires, flat wire conductors are respectively arranged at the 2i-th and 2i-1th slot layers of two adjacent stator slot groups, one side of the conductor arranged at the 2i-th slot layer is connected in series with the conductor arranged at the 2i-1th slot layer at one side in the circumferential direction of a stator iron core, the span is Y + A, the other side of the conductor is connected with a conductor arranged on the 2i-1 slot layer on the other side of the stator core, the span is Y-A, 2X mutually independent first branches are formed, the X first branches are connected in series to form a second branch, and the other X first branches are connected in series to form another second branch, one end, located at the 2i-1 slot layer or the 2i slot layer, of one second branch is connected with one end, located at the 2i + 1 slot layer or the 2i + 2 slot layer, of the other second branch, through the winding mode, the requirements of various schemes can be met, the universality is high, the sum of the total potentials of each branch of the stator winding in each slot and each layer is equal, the circulating current problem in the operation of the stator winding is avoided, and the service life of the stator winding is prolonged. And meanwhile, the NVH performance of the motor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator winding and a motor. Background Art

[0002] The winding method of the stator winding in the related art cannot be applied to various scheme requirements with different numbers of slots per level and per phase or different numbers of slot layers formed. The scheme has limitations. Some schemes also have the problem of unequal total potential of each branch in each slot and each layer, which leads to circulating current problems during the operation of the stator winding and noise problems during operation caused by the circulating current. There is room for improvement. Utility Model Content

[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a stator winding in which the total potential of each branch of the stator winding is equal in each slot and each layer, thereby avoiding the problem of circulating current during stator winding operation while ensuring the NVH performance of the motor.

[0004] The utility model also provides a motor.

[0005] According to the first embodiment of the present invention, the stator winding includes a plurality of flat wires, which are formed into 2K slot layers. The number of slots corresponding to each pole and each phase is X, and each stator slot corresponding to each pole constitutes a stator slot group. The two conductors of the flat wire are respectively arranged in the 2i-th and 2i-1-th slot layers of two adjacent stator slot groups.

[0006] One side of the conductor located in the 2i slot layer is connected in series with the conductor located in the 2i-1 slot layer on the circumferential side of the stator core, with a span of Y+A between the two. The other side of the conductor is connected in series with the conductor located in the 2i-1 slot layer on the circumferential side of the stator core, with a span of YA between the two. All flat wires located in the 2i and 2i-1 slot layers are connected to each other to form 2X independent first branches.

[0007] The first and last ends of the X first branches are respectively located at the 2i-1 slot layer of the 2b stator slot group and the 2i slot layer of the 2b+1 stator slot group, and the X first branches are connected in series to form a second branch.

[0008] In addition, the first branches of X are respectively located at the 2i-1 slot layer of the 2c-1 stator slot group and the 2i slot layer of the 2c stator slot group. In addition, the first branches of X are connected in series to form another second branch.

[0009] One end of the two independent second branches is located at the 2i slot layer, and the other end is located at the 2i-1 slot layer.

[0010] One end of the second branch formed by the flat wires arranged in series at the 2i and 2i-1 slot layers is connected to one end of the second branch formed by the flat wires arranged in series at the 2i+1 and 2i+2 slot layers, and one end of another second branch formed by the flat wires arranged in series at the 2i and 2i-1 slot layers is connected to one end of another second branch formed by the flat wires arranged in series at the 2i+1 and 2i+2 slot layers. Each phase of the stator winding forms two independent branches, K and i are positive integers, and A, b, and c are integers.

[0011] According to the stator winding of the embodiment of the present application, the above-mentioned winding method can meet the requirements of various solutions with different numbers of slots per level and per phase or different numbers of slot layers formed. It has strong versatility and makes the total potential of each branch of the stator winding in each slot and each layer equal, avoiding the circulation problem during the operation of the stator winding, while ensuring the NVH performance of the motor.

[0012] According to some embodiments of the present invention, the flat wires provided in the 2i and 2i-1 slot layers include:

[0013] The conductors on both sides are respectively arranged in the first flat wire group of the 2b stator slot group and the 2b+1 stator slot group.

[0014] The first flat wire group includes X-1 first flat wires and one second flat wire, the span of the first flat wires is Y-A+1, and the span of the second flat wires is YA-X+1; or the first flat wire group includes X-1 first flat wires and one second flat wire, the span of the first flat wires is YA-1, and the span of the second flat wires is Y-A+X-1;

[0015] The conductors on both sides are respectively arranged in the second flat wire group of the 2c-1 stator slot group and the 2c stator slot group.

[0016] The second flat wire group includes X-1 third flat wires and one fourth flat wire, the span of the third flat wires is Y-A+1, and the span of the fourth flat wire is YA-X+1; or the second flat wire group includes X-1 third flat wires and one fourth flat wire, the span of the third flat wires is YA-1, and the span of the fourth flat wire is Y-A+X-1;

[0017] The remaining flat wire is a fifth flat wire, and has a span of YA. The welding side span between two adjacent flat wires in the winding direction is Y+A.

[0018] According to some embodiments of the present invention, the stator winding includes a plurality of flat wires with a span of Y+A.

[0019] The welding side pin of the conductor provided in the 2i-1 slot layer of the 2b-th stator slot group is connected to the welding side pin of the conductor provided in the 2i slot layer of the 2b+1-th stator slot group, with the spans being Y-A+1 and YA-X+1, or YA-1 and Y-A+X-1 respectively;

[0020] Connect the welding side pin of the conductor located in the 2i-1 slot layer of the 2c-1 stator slot group with the welding side pin of the conductor located in the 2i slot layer of the 2c stator slot group, with the spans being Y-A+1 and YA-X+1, or YA-1 and Y-A+X-1 respectively;

[0021] The welding side span between the remaining two adjacent flat wires in the winding direction is YA.

[0022] According to some embodiments of the present invention, in two interconnected second branches, a conductor corresponding to a connection end of one second branch and a conductor corresponding to a connection end of another second branch are located in two adjacent slot groups.

[0023] According to some embodiments of the present invention, the number of stator slots provided in the stator core is 48, the number of motor poles is 8, the stator winding includes three phases, including U phase, V phase and W phase, the winding method of each phase winding is the same, each stator slot has two slot layers m and n, and each phase winding includes two branches.

[0024] The winding route of the first branch of the U phase of the stator winding is as follows:

[0025] 13m-20n-25m-32n-37m-44n-1m-9n-14m-21n-26m-33n-38m-45n-2m-8n;

[0026] The pins of the conductors corresponding to the mth slot layer of the 13th stator slot and the nth slot layer of the 8th stator slot can respectively form the lead-in end and the lead-out end of the first branch;

[0027] The winding route of the second branch of the U phase of the stator winding is as follows:

[0028] 2n-43m-38n-31m-26n-19m-14n-8m-3n-44m-39n-32m-27n-20m-15n-7m;

[0029] The pins of the conductors corresponding to the nth slot layer of the second stator slot and the mth slot layer of the seventh stator slot may respectively form the lead-in end and the lead-out end of the second branch.

[0030] According to some embodiments of the present invention, the number of stator slots provided in the stator core is 48, the number of motor poles is 8, the stator winding includes three phases, including U phase, V phase and W phase, the winding method of each phase winding is the same, each stator slot has two slot layers m and n, and each phase winding includes two branches.

[0031] The winding route of the first branch of the U phase of the stator winding is as follows:

[0032] 19n-25m-31n-37m-43n-1m-8n-14m-20n-26m-32n-38m-44n-2m-7n-13m;

[0033] The pins of the conductors corresponding to the nth slot layer of the 19th stator slot and the mth slot layer of the 13th stator slot can respectively form the lead-in end and the lead-out end of the first branch;

[0034] The winding route of the second branch of the U phase of the stator winding is as follows:

[0035] 43m-37n-31m-25n-19m-13n-8m-2n-44m-38n-32m-26n-20m-14n-7m-1n;

[0036] The pins of the conductors corresponding to the mth slot layer of the 43rd stator slot and the nth slot layer of the 1st stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0037] According to some embodiments of the present invention, the number of stator slots provided in the stator core is 54, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and each phase winding has the same winding method. Each stator slot has 6 slot layers m, n, o, p, q, r, and each phase winding includes 2 branches.

[0038] The winding route of the first branch of the U phase of the stator winding is as follows:

[0039] 19m-29n-37m-47n-1m-12n-20m-30n-38m-48n-2m-13n-21m-31n-39m-49n-3m-11n-

[0040] 19o-29p-37o-47p-1o-12p-20o-30p-38o-48p-2o-13p-21o-31p-39o-49p-3o-11p-

[0041] 19q-29r-37q-47r-1q-12r-20q-30r-38q-48r-2q-13r-21q-31r-39q-49r-3q-11r;

[0042] The pins of the conductors corresponding to the mth slot layer of the 19th stator slot and the rth slot layer of the 11th stator slot can respectively form the lead-in end and the lead-out end of the first branch;

[0043] The winding route of the second branch of the U phase of the stator winding is as follows:

[0044] 2n-46m-38n-28m-20n-12m-4n-48m-40n-30m-22n-11m-3n-47m-39n-29m-21n-10m-

[0045] 2p-46o-38p-28o-20p-12o-4p-48o-40p-30o-22p-11o-3p-47o-39p-29o-21p-10o-

[0046] 2r-46q-38r-28q-20r-12q-4r-48q-40r-30q-22r-11q-3r-47q-39r-29q-21r-10q;

[0047] The pins of the conductors corresponding to the nth slot layer of the second stator slot and the qth slot layer of the tenth stator slot may respectively form the lead-in end and the lead-out end of the second branch.

[0048] According to some embodiments of the present invention, the number of stator slots provided in the stator core is 72, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, the winding method of each phase winding is the same, each stator slot has two slot layers m and n, and each phase winding includes two branches.

[0049] The winding route of the first branch of the U phase of the stator winding is as follows:

[0050] 25m-38n-49m-62n-1m-15n-26m-39n-50m-63n-2m-16n-27m-40n-51m-64n-3m-17n-28m-41n-52m-65n-4m-14n;

[0051] The pins of the conductors corresponding to the mth slot layer of the 25th stator slot and the nth slot layer of the 14th stator slot can respectively form the lead-in end and the lead-out end of the first branch;

[0052] The winding route of the second branch of the U phase of the stator winding is as follows:

[0053] 2n-61m-50n-37m-26n-16m-5n-64m-53n-40m-29n-15m-4n-63m-52n-39m-28n-14m-3n-62m-51n-38m-27n-13m

[0054] The pins of the conductors corresponding to the nth slot layer of the 2nd stator slot and the mth slot layer of the 13th stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0055] According to some embodiments of the present invention, the flat wire includes:

[0056] two conductors, the conductors being disposed in the stator slots;

[0057] a connecting section connecting one ends of the two conductors;

[0058] The pins are arranged at the other end of the conductor. The two pins of the same flat wire are bent to the side away from the connecting section respectively. The pins of the two adjacent flat wires in the winding direction are connected to form the welding side of the stator winding.

[0059] According to an embodiment of the second aspect of the present invention, the motor includes a stator core and the above-mentioned stator winding, wherein the stator core is provided with a plurality of stator slots in a circumferential direction, and the stator winding is wound in the stator slots.

[0060] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0062] Figure 1 The stator winding arrangement according to the embodiment of the present invention is Figure 1 ;

[0063] Figure 2 The stator winding arrangement according to the embodiment of the present invention is Figure 2 ;

[0064] Figure 3 The stator winding arrangement according to the embodiment of the present invention is Figure 3 ;

[0065] Figure 4 The stator winding arrangement according to the embodiment of the present invention is Figure 4 ;

[0066] Figure 5 The stator winding arrangement according to the embodiment of the present invention is Figure 5 ;

[0067] Figure 6 The stator winding arrangement according to the embodiment of the present invention is Figure 6 ;

[0068] Figure 7 The stator winding arrangement according to the embodiment of the present invention is Figure 7 ;

[0069] Figure 8 The stator winding arrangement according to the embodiment of the present invention is Figure 8 ;

[0070] Figure 9 The stator winding arrangement according to the embodiment of the present invention is Figure 9 ;

[0071] Figure 10 It is a structural schematic diagram of the flat wire according to an embodiment of the present utility model.

[0072] Reference numerals:

[0073] Flat wire 10, conductor 1, connecting section 2, pin 3. DETAILED DESCRIPTION

[0074] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0075] Reference below Figure 1-Figure 4 A stator winding according to an embodiment of the present invention is described.

[0076] The motor using the stator winding wound with the flat wire 10 not only has higher torque density and power density, but also has higher motor efficiency.

[0077] The stator winding includes a plurality of flat wires 10, forming 2K slot layers. The number of slots corresponding to each pole and each phase is X, and each stator slot corresponding to each pole is a stator slot group. The two conductors 1 of the flat wire 10 are respectively arranged in the 2i-th and 2i-1-th slot layers of two adjacent stator slot groups.

[0078] Among them, one side of the conductor 1 arranged in the 2i slot layer is connected in series with the conductor 1 arranged in the 2i-1 slot layer on the one side of the stator core in the circumferential direction, and the span between the two is Y+A. The other side of the conductor 1 is connected in series with the conductor 1 arranged in the 2i-1 slot layer on the other side of the stator core in the circumferential direction, and the span between the two is YA. All the flat wires 10 arranged in the 2i and 2i-1 slot layers are interconnected to form 2X independent first branches.

[0079] Where A can be 0, such as Figure 1 and Figure 2 As shown, at this time, the number of slots corresponding to each stator slot group in each slot layer is the same, and A can also be ±1, such as Figure 3 、 Figure 5-Figure 8 As shown, in this case, each stator slot group has stator slots corresponding to odd-numbered slot layers and stator slots corresponding to even-numbered slot layers that overlap, and are staggered by one slot. A can also be other integers and is not limited here.

[0080] like Figure 9 As shown, Figure 9 Taking the stator core having 48 stator slots and the motor having 8 poles as an example, a stator winding having two slot layers, where the first layer is m and the second layer is n, as an example, four mutually independent first branches are formed through the above winding method.

[0081] The first branch-1's routing is as follows:

[0082] 1m-43n-37m-31n-25m-19n-13m-7n;

[0083] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 1st stator slot and the nth slot layer of the 7th stator slot can form the beginning and the end of the first branch-1 respectively;

[0084] The detour route of the first branch-2 is as follows:

[0085] 2m-44n-38m-32n-26m-20n-14m-8n;

[0086] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 2nd stator slot and the nth slot layer of the 8th stator slot can form the beginning and the end of the first branch-2 respectively;

[0087] The detour route of the first branch-3 is as follows:

[0088] 7m-1n-43m-37n-31m-25n-19m-13n;

[0089] Among them, the pins 3 of the conductor 1 corresponding to the nth slot layer of the 1st stator slot and the mth slot layer of the 7th stator slot can form the beginning and the end of the first branch-3 respectively;

[0090] The detour route of the first branch-4 is as follows:

[0091] 8m-2n-44m-38n-32m-26n-20m-14n;

[0092] The pins 3 of the conductor 1 corresponding to the nth slot layer of the 2nd stator slot and the mth slot layer of the 8th stator slot can form the head end and the tail end of the first branch- 4 respectively.

[0093] The beginning and the end of the X first branches are respectively located at the 2i-1th slot layer of the 2bth stator slot group and the 2ith slot layer of the 2b+1th stator slot group. The X first branches are connected in series to form a second branch.

[0094] like Figure 9 As shown, the 7th stator slot and the 8th stator slot belong to the 2bth stator slot group, the 13th stator slot and the 14th stator slot belong to the 2b+1th stator slot group, the beginning and end of the winding route of the first branch-3 and the winding route of the first branch-4 are located at the 2i-1th slot layer of the 2bth stator slot group and the 2ith slot layer of the 2b+1th stator slot group, and the first branch-3 and the first branch-4 are connected in series to form a second branch.

[0095] After connecting the head end of the first branch-3 and the tail end of the first branch-4, and connecting the tail end of the first branch-3 and the head end of the first branch-4, a closed loop is formed. If the connection between any two flat wires 10 in the closed loop is disconnected, a second branch can be formed.

[0096] In addition, the beginning and the end of the X first branches are respectively located at the 2i-1 slot layer of the 2c-1 stator slot group and the 2i slot layer of the 2c stator slot group. In addition, the X first branches are connected in series to form another second branch.

[0097] like Figure 9 As shown, the 7th stator slot and the 8th stator slot belong to the 2cth stator slot group, the 1st stator slot and the 2nd stator slot belong to the 2c-1th stator slot group, the beginning and end of the winding route of the first branch-1 and the winding route of the first branch-2 are located at the 2i-1th slot layer of the 2c-1th stator slot group and the 2ith slot layer of the 2cth stator slot group, and the first branch-1 and the first branch-2 are connected in series to form a second branch.

[0098] After connecting the head end of the first branch-1 and the tail end of the first branch-2, and connecting the tail end of the first branch-1 and the head end of the first branch-2, a closed loop is formed. By disconnecting the connection between any two flat wires 10 in the closed loop, another second branch can be formed.

[0099] For example Figure 8As shown, the heads and tails of the four first branches are respectively located at the mth slot layer of the 2c-1th stator slot group and the nth slot layer of the 2cth stator slot group, that is, the heads and tails of the four first branches are respectively located at 1m and 14n, 2m and 15n, 3m and 16n, and 4m and 17n.

[0100] The four first branches are connected in series, such as connecting 1m and 15n, 2m and 16n, 3m and 17n, and 4m and 14n, to form a closed loop. If the connection between any two flat wires 10 in the closed loop is disconnected, a second branch can be formed.

[0101] The heads and tails of the four first branches are located at the mth slot layer of the 2bth stator slot group and the nth slot layer of the 2b+1th stator slot group, that is, the heads and tails of the four first branches are located at 13m and 26n, 14m and 27n, 15m and 28n, and 16m and 29n, respectively.

[0102] The four first branches are connected in series from head to tail, such as connecting 13m and 27n, 14m and 28n, 15m and 29n, and 16m and 26n, to form a closed loop. If the connection between any two flat wires 10 in the closed loop is disconnected, a second branch can be formed.

[0103] like Figure 7 and Figure 8 As shown, one end of the two independent second branches is located at the 2i slot layer, and the other end is located at the 2i-1 slot layer.

[0104] One end of a second branch formed by the series connection of flat wires arranged at the 2i and 2i-1 slot layers is connected to one end of a second branch formed by the series connection of flat wires arranged at the 2i+1 and 2i+2 slot layers, and one end of another second branch formed by the series connection of flat wires arranged at the 2i and 2i-1 slot layers is connected to one end of another second branch formed by the series connection of flat wires arranged at the 2i+1 and 2i+2 slot layers. Each phase of the stator winding forms two independent branches, K and i are positive integers, and A, b, and c are integers.

[0105] In some embodiments, as Figure 7 As shown, the second branch formed by the series connection of the flat wires arranged at the 2i and 2i-1 slot layers is located at one end of the 2i-1 slot layer and is connected to the second branch formed by the series connection of the flat wires arranged at the 2i+1 and 2i+2 slot layers at one end of the 2i+2 slot layer, so that each phase of the stator winding is formed with two independent branches.

[0106] In other embodiments, Figure 6As shown, the second branch formed by the series connection of the flat wires arranged at the 2i and 2i-1 slot layers is located at one end of the 2i slot layer and is connected to the second branch formed by the series connection of the flat wires arranged at the 2i+1 and 2i+2 slot layers at one end of the 2i+1 slot layer, so that each phase of the stator winding is formed with two independent branches.

[0107] According to the stator winding of the embodiment of the present application, the stator winding formed by the above-mentioned winding method can meet the requirements of various solutions with different numbers of slots per level and per phase or different numbers of slot layers formed. It has strong versatility and makes the total potential of each branch of the stator winding in each slot and each layer equal, avoiding the circulation problem during the operation of the stator winding and ensuring the NVH performance of the motor.

[0108] Reference Figure 1 The flat wires located in the 2i and 2i-1 slot layers include:

[0109] The conductors 1 on both sides are respectively arranged in the first flat wire group of the 2b stator slot group and the 2b+1 stator slot group.

[0110] The first flat wire group includes X-1 first flat wires and one second flat wire, the span of the first flat wire is Y-A+1, and the span of the second flat wire is YA-X+1; or the first flat wire group includes X-1 first flat wires and one second flat wire, the span of the first flat wire is YA-1, and the span of the second flat wire is Y-A+X-1;

[0111] The conductors 1 on both sides are respectively arranged in the second flat wire group of the 2c-1 stator slot group and the 2c stator slot group.

[0112] The second flat wire group includes X-1 third flat wires and one fourth flat wire, the span of the third flat wire is Y-A+1, and the span of the fourth flat wire is YA-X+1; or the second flat wire group includes X-1 third flat wires and one fourth flat wire, the span of the third flat wire is YA-1, and the span of the fourth flat wire is Y-A+X-1;

[0113] The remaining flat wire is the fifth flat wire, the span is YA, and the welding side span between two adjacent flat wires in the winding direction is Y+A.

[0114] The stator windings formed by the winding method have the same welding side span, which reduces the possibility of errors occurring during the welding process.

[0115] Reference Figure 2 The stator winding includes a plurality of flat wires 10 with a span of Y+A.

[0116] The welding side pin 3 of the conductor 1 provided in the 2i-1 slot layer of the 2b-th stator slot group is connected to the welding side pin 3 of the conductor 1 provided in the 2i slot layer of the 2b+1-th stator slot group, with the spans being Y-A+1 and YA-X+1, or YA-1 and Y-A+X-1, respectively.

[0117] Connect the welding side pin 3 of the conductor 1 provided in the 2i-1 slot layer of the 2c-1 stator slot group with the welding side pin 3 of the conductor 1 provided in the 2i slot layer of the 2c stator slot group, with the spans being Y-A+1 and YA-X+1, or YA-1 and Y-A+X-1 respectively;

[0118] The welding side span between the remaining two adjacent rectangular wires 10 in the winding direction is YA.

[0119] The stator winding formed by the above winding method only requires one type of flat wire 10 with a span of Y+A, eliminating the need to produce multiple different flat wires 10 , thereby reducing production costs.

[0120] Furthermore, when the number of slot layers is 2, one branch of the stator winding is formed by one second branch; and when the number of slot layers is greater than 2, one branch of the stator winding is formed by connecting multiple second branches.

[0121] In order to facilitate the connection of the two second branches, the two second branches connected to each other, such as Figure 6 and Figure 7 As shown, in the two second branches connected to each other, the conductor corresponding to the connection end of one second branch and the conductor corresponding to the connection end of the other second branch are located in two adjacent slot groups, so that the span formed after the two are connected will not be too large or too small.

[0122] Reference Figure 3 The number of stator slots in the stator core is 48, the number of motor poles is 8, and the stator winding includes three phases, including U phase, V phase and W phase. The winding method of each phase is the same. Each stator slot has two slot layers m and n, and each phase winding contains two branches.

[0123] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0124] 13m-20n-25m-32n-37m-44n-1m-9n-14m-21n-26m-33n-38m-45n-2m-8n;

[0125] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 13th stator slot and the nth slot layer of the 8th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0126] The winding route of the second branch of the U phase of the stator winding is as follows:

[0127] 2n-43m-38n-31m-26n-19m-14n-8m-3n-44m-39n-32m-27n-20m-15n-7m;

[0128] The pins 3 of the conductor 1 corresponding to the nth slot layer of the second stator slot and the mth slot layer of the seventh stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0129] Reference Figure 2 The number of stator slots in the stator core is 48, the number of motor poles is 8, and the stator winding includes three phases, including U phase, V phase and W phase. The winding method of each phase is the same. Each stator slot has two slot layers m and n, and each phase winding contains two branches.

[0130] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0131] 19n-25m-31n-37m-43n-1m-8n-14m-20n-26m-32n-38m-44n-2m-7n-13m;

[0132] Among them, the pins 3 of the conductor 1 corresponding to the nth slot layer of the 19th stator slot and the mth slot layer of the 13th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0133] The winding route of the second branch of the U phase of the stator winding is as follows:

[0134] 43m-37n-31m-25n-19m-13n-8m-2n-44m-38n-32m-26n-20m-14n-7m-1n;

[0135] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 43rd stator slot and the nth slot layer of the 1st stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0136] Reference Figure 1 The number of stator slots in the stator core is 48, the number of motor poles is 8, and the stator winding includes three phases, including U phase, V phase and W phase. The winding method of each phase is the same. Each stator slot has two slot layers m and n, and each phase winding contains two branches.

[0137] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0138] 13m-19n-25m-31n-37m-43n-1m-8n-14m-20n-26m-32n-38m-44n-2m-7n;

[0139] Among them, the pins 3 of the conductor 1 corresponding to the nth slot layer of the 7th stator slot and the mth slot layer of the 13th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0140] The winding route of the second branch of the U phase of the stator winding is as follows:

[0141] 1n-43m-37n-31m-25n-19m-13n-8m-2n-44m-38n-32m-26n-20m-14n-7m;

[0142] The pins 3 of the conductor 1 corresponding to the mth slot layer of the 7th stator slot and the nth slot layer of the 1st stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0143] like Figure 4 As shown, the number of stator slots opened in the stator core is 54, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has two slot layers m and n, and each phase winding contains two branches.

[0144] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0145] 19m-29n-37m-47n-1m-12n-20m-30n-38m-48n-2m-13n-21m-31n-39m-49n-3m-11n;

[0146] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 19th stator slot and the nth slot layer of the 11th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0147] The winding route of the second branch of the U phase of the stator winding is as follows:

[0148] 2n-46m-38n-28m-20n-12m-4n-48m-40n-30m-22n-11m-3n-47m-39n-29m-21n-10m;

[0149] The pins 3 of the conductor 1 corresponding to the mth slot layer of the 10th stator slot and the nth slot layer of the 2nd stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0150] like Figure 5 As shown, the number of stator slots opened in the stator core is 54, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has two slot layers m and n, and each phase winding contains two branches.

[0151] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0152] 19m-28n-37m-46n-1m-11n-20m-29n-38m-47n-2m-12n-21m-30n-39m-48n-3m-10n;

[0153] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 19th stator slot and the nth slot layer of the 10th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0154] The winding route of the second branch of the U phase of the stator winding is as follows:

[0155] 1n-46m-37n-28m-19n-12m-3n-48m-39n-30m-21n-11m-2n-47m-38n-29m-20n-10m;

[0156] The pins 3 of the conductor 1 corresponding to the mth slot layer of the 10th stator slot and the nth slot layer of the 1st stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0157] like Figure 6 As shown, the number of stator slots opened in the stator core is 54, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has 4 slot layers m, n, o, p, and each phase winding contains 2 branches.

[0158] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0159] 19m-29n-37m-47n-1m-12n-20m-30n-38m-48n-2m-13n-21m-31n-39m-49n-3m-11n-

[0160] 19o-29p-37o-47p-1o-12p-20o-30p-38o-48p-2o-13p-21o-31p-39o-49p-3o-11p;

[0161] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 19th stator slot and the pth slot layer of the 11th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0162] The winding route of the second branch of the U phase of the stator winding is as follows:

[0163] 2n-46m-38n-28m-20n-12m-4n-48m-40n-30m-22n-11m-3n-47m-39n-29m-21n-10m-

[0164] 2p-46o-38p-28o-20p-12o-4p-48o-40p-30o-22p-11o-3p-47o-39p-29o-21p-10o;

[0165] The pins 3 of the conductor 1 corresponding to the oth slot layer of the 10th stator slot and the nth slot layer of the 2nd stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0166] like Figure 7 As shown, the number of stator slots opened in the stator core is 54, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has 6 slot layers m, n, o, p, q, r, and each phase winding contains 2 branches.

[0167] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0168] 19m-29n-37m-47n-1m-12n-20m-30n-38m-48n-2m-13n-21m-31n-39m-49n-3m-11n-

[0169] 19o-29p-37o-47p-1o-12p-20o-30p-38o-48p-2o-13p-21o-31p-39o-49p-3o-11p-

[0170] 19q-29r-37q-47r-1q-12r-20q-30r-38q-48r-2q-13r-21q-31r-39q-49r-3q-11r;

[0171] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 19th stator slot and the rth slot layer of the 11th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0172] The winding route of the second branch of the U phase of the stator winding is as follows:

[0173] 2n-46m-38n-28m-20n-12m-4n-48m-40n-30m-22n-11m-3n-47m-39n-29m-21n-10m-

[0174] 2p-46o-38p-28o-20p-12o-4p-48o-40p-30o-22p-11o-3p-47o-39p-29o-21p-10o-

[0175] 2r-46q-38r-28q-20r-12q-4r-48q-40r-30q-22r-11q-3r-47q-39r-29q-21r-10q;

[0176] The pins of the conductors corresponding to the nth slot layer of the second stator slot and the qth slot layer of the tenth stator slot may respectively form the lead-in end and the lead-out end of the second branch.

[0177] like Figure 8 As shown, the number of stator slots opened in the stator core is 72, the number of motor poles is 6, and the stator winding includes three phases, including U phase, V phase and W phase. The winding method of each phase is the same. Each stator slot has two slot layers m and n, and each phase winding contains two branches.

[0178] Among them, the winding route of the first branch of the U phase of the stator winding is as follows:

[0179] 25m-38n-49m-62n-1m-15n-26m-39n-50m-63n-2m-16n-27m-40n-51m-64n-3m-17n-28m-41n-52m-65n-4m-14n;

[0180] Among them, the pins 3 of the conductor 1 corresponding to the mth slot layer of the 25th stator slot and the nth slot layer of the 14th stator slot can form the lead-in end and the lead-out end of the first branch respectively;

[0181] The winding route of the second branch of the U phase of the stator winding is as follows:

[0182] 2n-61m-50n-37m-26n-16m-5n-64m-53n-40m-29n-15m-4n-63m-52n-39m-28n-14m-3n-62m-51n-38m-27n-13m

[0183] The pins 3 of the conductor 1 corresponding to the nth slot layer of the 2nd stator slot and the mth slot layer of the 13th stator slot can respectively form the lead-in end and the lead-out end of the second branch.

[0184] Reference Figure 10The stator winding includes several flat wires 10, and the flat wire 10 includes a crown side, which is arranged on one side of the stator core. In addition, the pins 3 of two adjacent flat wires 10 are connected to form a welding side of the stator winding, and the welding side is arranged on the other side of the stator core, so that welding can be performed on one side during the production process to connect the pins 3 of each flat wire 10, making the overall layout more neat and avoiding connection errors.

[0185] like Figure 4 As shown, several flat wires 10 respectively include: two conductors 1, a connecting section 2 and two pins 3. The two conductors 1 are respectively inserted into different stator slots. The connecting section 2 connects one end of the two conductors 1. The above-mentioned crown side is the side of the flat wire 10 where the connecting section 2 is located. The pin 3 is provided at the other end of the conductor 1. The two pins 3 of the same flat wire 10 are respectively bent outwards. The pins 3 of the two adjacent flat wires 10 in the winding direction are connected to form the welding side of the stator winding.

[0186] According to an embodiment of the present invention, a motor includes a stator core and the aforementioned stator winding. The stator core is circumferentially provided with a plurality of stator slots, and the stator winding is wound within the stator slots. The branches of each phase of the stator winding are evenly distributed within the stator core, making winding arrangement simple. Furthermore, the potentials of each branch of each phase are equal, effectively preventing the generation of circulating currents and enhancing the reliability and stability of the motor operation.

[0187] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0188] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0189] In the description of the present invention, “plurality” means two or more.

[0190] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0191] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0192] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0193] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator winding, characterized in that: The invention comprises a plurality of flat wires, forming a 2K slot layer, wherein the number of slots corresponding to each pole and each phase is X, and each stator slot corresponding to each pole is a stator slot group, and the two conductors of the flat wire are respectively arranged in the 2i-th and 2i-1-th slot layers of two adjacent stator slot groups. One side of the conductor located in the 2i slot layer is connected in series with the conductor located in the 2i-1 slot layer on the circumferential side of the stator core, with a span of Y+A between the two. The other side of the conductor is connected in series with the conductor located in the 2i-1 slot layer on the circumferential side of the stator core, with a span of YA between the two. All flat wires located in the 2i and 2i-1 slot layers are connected to each other to form 2X independent first branches. The first and last ends of the X first branches are respectively located at the 2i-1 slot layer of the 2b stator slot group and the 2i slot layer of the 2b+1 stator slot group, and the X first branches are connected in series to form a second branch. In addition, the first branches of X are respectively located at the 2i-1 slot layer of the 2c-1 stator slot group and the 2i slot layer of the 2c stator slot group. In addition, the first branches of X are connected in series to form another second branch. One end of the two independent second branches is located at the 2i slot layer, and the other end is located at the 2i-1 slot layer. One end of the second branch formed by the flat wires arranged in series at the 2i and 2i-1 slot layers is connected to one end of the second branch formed by the flat wires arranged in series at the 2i+1 and 2i+2 slot layers, and one end of another second branch formed by the flat wires arranged in series at the 2i and 2i-1 slot layers is connected to one end of another second branch formed by the flat wires arranged in series at the 2i+1 and 2i+2 slot layers. Each phase of the stator winding forms two independent branches, K and i are positive integers, and A, b, and c are integers.

2. The stator winding according to claim 1, characterized in that The flat wires located in the 2i and 2i-1 slot layers include: The conductors on both sides are respectively arranged in the first flat wire group of the 2b stator slot group and the 2b+1 stator slot group. The first flat wire group includes X-1 first flat wires and one second flat wire, the span of the first flat wires is Y-A+1, and the span of the second flat wires is YA-X+1; or the first flat wire group includes X-1 first flat wires and one second flat wire, the span of the first flat wires is YA-1, and the span of the second flat wires is Y-A+X-1; The conductors on both sides are respectively arranged in the second flat wire group of the 2c-1 stator slot group and the 2c stator slot group. The second flat wire group includes X-1 third flat wires and one fourth flat wire, the span of the third flat wires is Y-A+1, and the span of the fourth flat wire is YA-X+1; or the second flat wire group includes X-1 third flat wires and one fourth flat wire, the span of the third flat wires is YA-1, and the span of the fourth flat wire is Y-A+X-1; The remaining flat wire is a fifth flat wire, and has a span of YA. The welding side span between two adjacent flat wires in the winding direction is Y+A.

3. The stator winding according to claim 1, characterized in that It includes several flat wires with a span of Y+A. The welding side pin of the conductor provided in the 2i-1 slot layer of the 2b-th stator slot group is connected to the welding side pin of the conductor provided in the 2i slot layer of the 2b+1-th stator slot group, with the spans being Y-A+1 and YA-X+1, or YA-1 and Y-A+X-1 respectively; Connect the welding side pin of the conductor located in the 2i-1 slot layer of the 2c-1 stator slot group with the welding side pin of the conductor located in the 2i slot layer of the 2c stator slot group, with the spans being Y-A+1 and YA-X+1, or YA-1 and Y-A+X-1 respectively; The welding side span between the remaining two adjacent flat wires in the winding direction is YA.

4. The stator winding according to claim 1, characterized in that In two second branches connected to each other, a conductor corresponding to a connection end of one second branch and a conductor corresponding to a connection end of the other second branch are located in two adjacent slot groups.

5. The stator winding according to claim 1, characterized in that The number of stator slots provided in the stator core is 48, the number of motor poles is 8, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has two slot layers m and n, and each phase winding includes two branches. The winding route of the first branch of the U phase of the stator winding is as follows: 13m-20n-25m-32n-37m-44n-1m-9n-14m-21n-26m-33n-38m-45n-2m-8n; The pins of the conductors corresponding to the mth slot layer of the 13th stator slot and the nth slot layer of the 8th stator slot can respectively form the lead-in end and the lead-out end of the first branch; The winding route of the second branch of the U phase of the stator winding is as follows: 2n-43m-38n-31m-26n-19m-14n-8m-3n-44m-39n-32m-27n-20m-15n-7m; The pins of the conductors corresponding to the nth slot layer of the second stator slot and the mth slot layer of the seventh stator slot may respectively form the lead-in end and the lead-out end of the second branch.

6. The stator winding according to claim 1, characterized in that The number of stator slots provided in the stator core is 48, the number of motor poles is 8, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has two slot layers m and n, and each phase winding includes two branches. The winding route of the first branch of the U phase of the stator winding is as follows: 19n-25m-31n-37m-43n-1m-8n-14m-20n-26m-32n-38m-44n-2m-7n-13m; The pins of the conductors corresponding to the nth slot layer of the 19th stator slot and the mth slot layer of the 13th stator slot can respectively form the lead-in end and the lead-out end of the first branch; The winding route of the second branch of the U phase of the stator winding is as follows: 43m-37n-31m-25n-19m-13n-8m-2n-44m-38n-32m-26n-20m-14n-7m-1n; The pins of the conductors corresponding to the mth slot layer of the 43rd stator slot and the nth slot layer of the 1st stator slot can respectively form the lead-in end and the lead-out end of the second branch.

7. The stator winding according to claim 1, characterized in that The number of stator slots provided in the stator core is 54, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has 6 slot layers m, n, o, p, q, r, and each phase winding includes 2 branches. The winding route of the first branch of the U phase of the stator winding is as follows: 19m-29n-37m-47n-1m-12n-20m-30n-38m-48n-2m-13n-21m-31n-39m-49n-3m-11n- 19o-29p-37o-47p-1o-12p-20o-30p-38o-48p-2o-13p-21o-31p-39o-49p-3o-11p- 19q-29r-37q-47r-1q-12r-20q-30r-38q-48r-2q-13r-21q-31r-39q-49r-3q-11r; The pins of the conductors corresponding to the mth slot layer of the 19th stator slot and the rth slot layer of the 11th stator slot can respectively form the lead-in end and the lead-out end of the first branch; The winding route of the second branch of the U phase of the stator winding is as follows: 2n-46m-38n-28m-20n-12m-4n-48m-40n-30m-22n-11m-3n-47m-39n-29m-21n-10m- 2p-46o-38p-28o-20p-12o-4p-48o-40p-30o-22p-11o-3p-47o-39p-29o-21p-10o- 2r-46q-38r-28q-20r-12q-4r-48q-40r-30q-22r-11q-3r-47q-39r-29q-21r-10q; The pins of the conductors corresponding to the nth slot layer of the second stator slot and the qth slot layer of the tenth stator slot may respectively form the lead-in end and the lead-out end of the second branch.

8. The stator winding according to claim 1, characterized in that The number of stator slots provided in the stator core is 72, the number of motor poles is 6, the stator winding includes three phases, including U phase, V phase and W phase, and the winding method of each phase winding is the same. Each stator slot has two slot layers m and n, and each phase winding includes two branches. The winding route of the first branch of the U phase of the stator winding is as follows: 25m-38n-49m-62n-1m-15n-26m-39n-50m-63n-2m-16n-27m-40n-51m-64n-3m-17n-28m-41n-52m-65n-4m-14n; The pins of the conductors corresponding to the mth slot layer of the 25th stator slot and the nth slot layer of the 14th stator slot can respectively form the lead-in end and the lead-out end of the first branch; The winding route of the second branch of the U phase of the stator winding is as follows: 2n-61m-50n-37m-26n-16m-5n-64m-53n-40m-29n-15m-4n-63m-52n-39m-28n-14m-3n-62m-51n-38m-27n-13m The pins of the conductors corresponding to the nth slot layer of the 2nd stator slot and the mth slot layer of the 13th stator slot can respectively form the lead-in end and the lead-out end of the second branch.

9. The stator winding according to claim 1, characterized in that The flat wire comprises: two conductors, the conductors being disposed in the stator slots; a connecting section connecting one ends of the two conductors; The pins are arranged at the other end of the conductor. The two pins of the same flat wire are bent to the side away from the connecting section respectively. The pins of the two adjacent flat wires in the winding direction are connected to form the welding side of the stator winding.

10. A motor, characterized in that: The invention comprises a stator core and a stator winding according to any one of claims 1 to 9, wherein a plurality of stator slots are provided on the stator core in a circumferential direction, and the stator winding is wound on the stator slots.

Images