CN210327195U - Motor winding and motor stator - Google Patents
Motor winding and motor stator Download PDFInfo
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- CN210327195U CN210327195U CN201921698767.0U CN201921698767U CN210327195U CN 210327195 U CN210327195 U CN 210327195U CN 201921698767 U CN201921698767 U CN 201921698767U CN 210327195 U CN210327195 U CN 210327195U
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Abstract
The embodiment of the utility model discloses motor winding and motor stator. Wherein, this motor winding includes: the system comprises a plurality of branches, a first switch, a second switch and a third switch, wherein each branch comprises a first out-of-slot end part, a circulating part, a first in-slot part, a first out-of-slot turning part, a second in-slot part and a second out-of-slot end part which are sequentially connected; the plurality of branches includes: a plurality of first branches and a plurality of second branches; the first branch circuits and the second branch circuits are in one-to-one correspondence, and the extending ends of the outer end parts of the second grooves of the first branch circuits and the extending ends of the outer end parts of the second grooves of the corresponding second branch circuits are located in the same radial direction and are connected. The embodiment of the utility model provides a technical scheme can reduce the conductor kind, reduces the use of busbar and busbar.
Description
Technical Field
The utility model relates to the technical field of electric machines, especially, relate to a motor winding and motor stator.
Background
The shape of a conductor in the existing motor winding is various, so that the manufacturing process is complex, a large number of bus bars and bus bars are needed to be used to connect the end parts of the motor in each phase, the process complexity can be brought to the bus bars and the bus bars in the manufacturing process of the motor stator winding, the production cost and efficiency are increased, the insulation and rigidity of the bus bars and the bus bars are high, and the performance of the motor winding can be affected.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a motor winding and motor stator can reduce the conductor kind, reduces the use of busbar and busbar, and reduction in production cost improves machining efficiency.
In a first aspect, an embodiment of the present invention provides a motor winding, including:
a plurality of branch circuits are arranged on the base plate,
any branch comprises a first out-of-slot end, a circulating part, a first in-slot part, a first out-of-slot turning part, a second in-slot part and a second out-of-slot end which are connected in sequence, wherein the circulating part comprises a third in-slot part, a second out-of-slot turning part, a fourth in-slot part and a third out-of-slot turning part which are connected in a circulating arrangement mode in sequence, the first out-of-slot end is connected with the third in-slot part positioned at one end of the circulating part, and the first in-slot part is connected with the third out-of-slot turning part positioned at the other end of the circulating part;
any branch is wound into at least one circle along the circumferential direction, the in-groove parts of any branch are distributed in at least two layers along the radial direction, the in-groove parts positioned in the same circle occupy two adjacent layers, the third in-groove parts positioned in the same circle are positioned in the same layer, the fourth in-groove parts positioned in the same circle are positioned in the same layer, and the third in-groove parts and the fourth in-groove parts of any branch are positioned in different layers; the second in-slot parts of all the branches are positioned at the same layer;
the first outer-slot turning part and the second outer-slot turning part are positioned on one side of the motor, and the outer end part of the first outer slot, the outer end part of the second outer slot and the third outer-slot turning part are positioned on the other side of the motor;
the plurality of branches includes: a plurality of first branches and a plurality of second branches;
the extending directions of the first groove outer end and the second groove outer end of any first branch in the circumferential direction are opposite and close to each other;
the extension directions of the first groove outer end part and the second groove outer end part of any second branch in the circumferential direction are the same;
the extension directions of the first groove outer end part of the first branch and the first groove outer end part of the second branch in the circumferential direction are the same;
the extension directions of the second groove outer end part of the first branch and the second groove outer end part of the second branch in the circumferential direction are opposite and close to each other;
the in-groove parts of any two first branches are positioned in different grooves, and the in-groove parts of any two second branches are positioned in different grooves;
the first branch circuits and the second branch circuits are in one-to-one correspondence, and the extending ends of the outer end parts of the second grooves of the first branch circuits and the extending ends of the outer end parts of the second grooves of the corresponding second branch circuits are located in the same radial direction and are adjacent to each other.
Further, in any branch, the distance in the circumferential direction between the adjacent in-slot portions in the same turn is equal to the full pitch.
Furthermore, in a part of the first branches, the sum of the distances spanned in the circumferential direction by the second groove outer end of any one first branch and the second groove outer end of the corresponding second branch is less than the integral distance;
in the other part of the first branches, the sum of the distances spanned by the second groove outer end of any one first branch and the second groove outer end of the corresponding second branch in the circumferential direction is greater than the integral distance.
Further, in any branch, the distances in the circumferential direction between the third in-slot portions located in the same circle and the two adjacent fourth in-slot portions thereof are different, the distance in the circumferential direction between the two adjacent third in-slot portions located in the same circle is equal to 2 times of the integer distance, and the distance in the circumferential direction between the two adjacent fourth in-slot portions located in the same circle is equal to 2 times of the integer distance.
Further, the plurality of branches for forming the same phase winding include two first branches and two second branches.
Further, any branch is a continuous coil.
Furthermore, the third outer turning part comprises a third outer slot end part and a fourth outer slot end part, in any third outer turning part, one end of the third outer slot end part far away from the fourth outer slot end part is connected with an adjacent fourth inner slot part, one end of the fourth outer slot end part far away from the third outer slot end part is connected with an adjacent third inner slot part, and the extension end of the third outer slot end part close to the fourth outer slot end part and the extension end of the fourth outer slot end part close to the third outer slot end part are positioned in the same radial direction and are adjacent;
in any branch, a first card sending coil is formed by the outer end part of the first slot, a third in-slot part, a second out-slot turning part, a fourth in-slot part and the outer end part of the third slot which are positioned at one end of the circulating part, and the extending directions of the outer end part of the first slot and the outer end part of the third slot of the first card sending coil are opposite and far away in the circumferential direction; a fourth slot outer end part positioned at the other end of the circulating part forms a second hairpin coil together with the first slot inner part, the first slot outer turning part, the second slot inner part and the second slot outer end part;
in the rest of the cyclic part, each group of contiguous permutations: a third hairpin coil is formed by a fourth slot outer end part, a third slot inner part, a second slot outer turning part, a fourth slot inner part and a third slot outer end part, and the extension directions of the third slot outer end part and the fourth slot outer end part of the third hairpin coil in the circumferential direction are opposite and far away;
in any first branch circuit with the integral distance, the extending directions of the outer end part of the fourth slot and the outer end part of the second slot of the second hairpin coil are opposite and far away in the circumferential direction;
in any second branch, the extension direction of the fourth slot outer end part of the second hairpin coil and the extension direction of the second slot outer end part of the second hairpin coil in the circumferential direction are the same.
Further, any branch is wound into a circle along the circumferential direction.
Furthermore, any branch is wound into at least two circles along the circumferential direction, the third in-groove parts of the two adjacent circles of any branch are aligned one by one along the radial direction, the fourth in-groove parts of the two adjacent circles of any branch are aligned one by one along the radial direction, in any branch, the in-groove parts located in different circles are located in different layers, and the in-groove parts of the two adjacent circles are located in four adjacent layers.
In a second aspect, the embodiment of the present invention further provides a motor stator, including: stator core and the utility model discloses the motor winding that arbitrary embodiment provided, stator core are provided with a plurality of along circumference arrangement and along axially extended groove, and the first inslot portion, second inslot portion, third inslot portion and the fourth inslot portion of branch road are located the inslot.
The utility model discloses technical scheme carries out the antitorque song through the second groove outer tip with many second branches, the extension end that makes the second groove outer tip of first branch road is located same radial and adjacent with the extension end of the second groove outer tip of the second branch road that corresponds, convenient welding, so that the first branch road and the second branch road series connection that correspond, thereby can reduce the use of busbar and busbar, the shape of many first branch roads is the same, the second branch road is similar with the shape of first branch road, the difference only lies in second groove outer tip in ascending extending direction in week, thereby can reduce motor winding's conductor kind, and the production cost is reduced, and the machining efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a motor winding according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a motor stator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a phase winding according to an embodiment of the present invention;
FIG. 4 is a partial enlarged view of area a of FIG. 3;
fig. 5 is a schematic structural diagram of a second branch according to an embodiment of the present invention;
fig. 6 is a schematic diagram of two second branches in one phase winding in fig. 3;
fig. 7 is a schematic view illustrating a tiled expansion of a phase winding according to an embodiment of the present invention;
fig. 8 is a schematic view illustrating a tiled expansion of a phase winding according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another motor winding according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another motor stator according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a first hairpin coil according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a second hairpin coil in a second branch according to an embodiment of the present invention;
fig. 13 is a schematic view illustrating a tiled expansion of a phase winding according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a motor winding according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of the inner two-layer structure of FIG. 14 in a motor winding;
fig. 16 is a schematic structural diagram of another phase winding according to an embodiment of the present invention;
fig. 17 is a schematic view illustrating a tiled expansion of another phase winding according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
An embodiment of the utility model provides a motor winding. Fig. 1 is a schematic structural diagram of a motor winding according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a motor stator provided by an embodiment of the present invention. Fig. 3 is a schematic structural diagram of a phase winding according to an embodiment of the present invention. Fig. 4 is a partially enlarged view of the area a in fig. 3. Fig. 5 is a schematic structural diagram of a second branch according to an embodiment of the present invention. Fig. 6 is a schematic diagram of two second branches in one phase winding in fig. 3. Fig. 7 is a schematic view illustrating a tiled development of a phase winding according to an embodiment of the present invention. The motor winding can be a stator winding or a rotor winding and can be arranged on a stator core or a rotor core of the motor. As shown in fig. 1 to 6, the motor winding includes: a plurality of branches 200.
As shown in fig. 5, each of the branches 200 includes a first out-of-slot portion 210, a circulating portion 220, a first in-slot portion 230, a first out-of-slot turn portion 240, a second in-slot portion 250, and a second out-of-slot portion 260, which are sequentially connected, the circulating portion 220 includes a third in-slot portion 221, a second out-of-slot turn portion 222, a fourth in-slot portion 223, and a third out-of-slot turn portion 224, which are sequentially and cyclically connected, the first out-of-slot portion 210 is connected to the third in-slot portion 221 located at one end of the circulating portion 220, and the first in-slot portion 230 is connected to the third out-of-slot turn portion 224 located at the other end of the circulating portion 220.
As shown in fig. 3, each branch 200 is wound into at least one circle along the circumferential direction, the in-slot portions of each branch 200 are distributed in at least two layers along the radial direction, the in-slot portions located in the same circle occupy two adjacent layers, the third in-slot portion 221 located in the same circle is located in the same layer, the fourth in-slot portion 223 located in the same circle is located in the same layer, and the third in-slot portion 221 and the fourth in-slot portion 223 of each branch are located in different layers. The second in-slot portions 250 of all the legs 200 are located at the same level. The first in-slot portions 230 of all the legs 200 are located at the same level. The first in-slot portion 230 and the second in-slot portion 250 of any of the branches 200 are located in different layers.
Referring to fig. 2 and 5, the first and second out-of-slot turns 240 and 222 are located on one side of the motor, and the first, second and third out-of-slot turns 210, 260 and 224 are located on the other side of the motor.
As shown in fig. 1 and 3, the plurality of branches 200 includes: a plurality of first branches 201 and a plurality of second branches 202.
As shown in fig. 4, the first and second slot outer ends 210 and 260 of any of the first branches 201 extend in opposite directions in the circumferential direction and are close to each other; the first and second slot outer ends 210, 260 of any second leg 202 extend in the same circumferential direction; the first outer slot end 210 of the first branch 201 and the first outer slot end 210 of the second branch 202 extend in the same direction in the circumferential direction; the second slot outer end 260 of the first leg 201 and the second slot outer end 260 of the second leg 202 extend in opposite directions in the circumferential direction and are adjacent.
As shown in fig. 3 and 6, the in-slot portions of any two first branches 201 are located in different slots 52, and the in-slot portions of any two second branches 202 are located in different slots 52.
Referring to fig. 3 and 4, the first branch 201 and the second branch 202 are in one-to-one correspondence, the extending end 270 of the second slot outer end 260 of the first branch 201 and the extending end 270 of the second slot outer end 260 of the second branch 202 are in one-to-one correspondence, and the extending end 270 of the second slot outer end 260 of the first branch 201 and the extending end 270 of the second slot outer end 260 of the corresponding second branch 202 are located in the same radial direction and adjacent to each other, so that welding is facilitated.
Wherein the extending direction of AA' in FIG. 1 is parallel to the axial direction; the extending direction of BB' is the circumferential direction, namely the circumferential direction; O1O2, O1O3, and O1O4 are exemplary drawn three directions extending in a radial direction. The motor windings may be single phase or multi-phase. Alternatively, the motor windings may be three-phase. The tiled expansion schematic diagrams of each phase winding are similar, fig. 7 exemplarily shows the tiled expansion schematic diagram of the U-phase winding, the V-phase winding and the W-phase winding are only required to move the U-phase winding by X slots or 2X slots along the circumferential direction, and X is the number of slots of each phase per pole. The embodiment of the utility model provides an use the three-phase to explain as the example, this three-phase winding can include U looks, V looks and W looks. The embodiment of the utility model provides a do not restrict the number of poles of slot number and motor. Fig. 1 to 3 exemplarily show the case where the number of slots 52 of the stator core 51 is 96, the number of teeth 53 is 96, the number of poles of the motor is 16, and the number of slots per phase per pole is 2. Fig. 7 exemplarily shows a case where the number of slots 52 of the stator core 51 is 48, the number of teeth 53 is 48, the number of poles of the motor is 8, and the number of slots per phase per pole is 2, and the slot numbers are 1 to 48 in fig. 7, respectively. Fig. 1 to 3 exemplarily show a case where any of the branches 200 is wound in 3 turns in the circumferential direction. As shown in fig. 7, each branch 200 is wound in 2 turns in the circumferential direction, and the in-slot portion located in the first turn occupies one layer and two layers, and the in-slot portion located in the second turn occupies three layers and four layers. The extension end 270 of the first outer slot end 210 and the extension end 270 of the second outer slot end 260 of each branch are used as connection ends, such as a U1 phase leading-out line, a U2 phase leading-out line, a U1 phase neutral point and a U2 phase neutral point in FIG. 7. By connecting the connection ends of the windings of the respective phases, a star connection or a delta connection is formed.
The second branch 202 is obtained by reversely twisting the second out-of-slot end 260 of the first branch 201, so that the extending end 270 of the second out-of-slot end 260 of the first branch 201 and the extending end 270 of the second out-of-slot end 260 of the corresponding second branch 202 are located in the same radial direction and adjacent to each other, welding is facilitated, a reduction bus bar and a bus bar are not needed for connection, the number of parallel branches in a phase winding is reduced, and the requirements of performances such as motor power and voltage are met.
The technical scheme of this embodiment is through carrying out the antitorque song with the second groove outer tip of many second branches, make the extension end of the second groove outer tip of first branch road and the extension end of the second groove outer tip of the second branch road that corresponds be located same radial and adjacent, convenient welding, so that the first branch road and the second branch road series connection that correspond, thereby can reduce the use of busbar and busbar, the shape of many first branch roads is the same, the second branch road is similar with the shape of first branch road, the difference only lies in second groove outer tip at the ascending extending direction of circumference, thereby can reduce motor winding's conductor kind, and the production cost is reduced, and the machining efficiency is improved.
Optionally, on the basis of the above-described embodiment, with continued reference to fig. 3 to 6, the plurality of branches 200 for forming the same phase winding include two first branches 201 and two second branches 202. As shown in fig. 3 and 6, the second in-slot portions 250 in the two first branches 201 of the plurality of branches 200 for forming the same phase winding are located in the adjacent two slots; the second in-slot portions 250 in two second branches 202 are located in two adjacent slots.
Optionally, on the basis of the above embodiment, with continued reference to fig. 1, 3 to 6, any branch 200 is a continuous coil. The motor windings may be wave windings.
Optionally, with continued reference to fig. 1 and 3 to 6, in any branch 200, the distances in the circumferential direction between the third in-slot portion 221 and the adjacent two fourth in-slot portions 223 in the same turn are different, as shown in fig. 5, the distance D1 between the third in-slot portion 221 and the fourth in-slot portion 223 adjacent to the second out-of-slot turn 222 is less than the integer pitch, and the distance D2 between the third in-slot portion 221 and the fourth in-slot portion 223 adjacent to the third out-of-slot turn 224 is greater than the integer pitch; the distance D3 in the circumferential direction of the adjacent two third in-slot portions 221 located in the same ring is equal to 2 times the full pitch, and the distance D4 in the circumferential direction of the adjacent two fourth in-slot portions 223 located in the same ring is equal to 2 times the full pitch.
Wherein the pitch is equal to the number of slots of the motor divided by the number of poles of the motor, a part of the in-slot portions of the first branch 201 and a part of the in-slot portions of the second branch 202 in a phase winding in fig. 3 or fig. 7 are located in the same slot, as in fig. 7, the in-slot portions of one first branch 201 and one second branch 202 are located in slots numbered 4, 9, 16, 21, 46, 40, 34, 28, and the other part of the in-slot portions of the first branch 201 and the other part of the in-slot portions of the second branch 202 are located in different slots, as in fig. 7, the in-slot portions of the other first branch 201 are located in slots numbered 3, 8, 15, 20, 47, 39, 35, 29, and the in-slot portions of the other second branch 202 are located in slots numbered 5, 10, 17, 22, 45, 41, 33, 27. The slots occupied by the two first branches 201 in a phase winding partially overlap the slots occupied by the two second branches 201. The motor windings are same-slot out-of-phase windings.
Optionally, on the basis of the above embodiment, fig. 8 is a schematic view illustrating a tiled development of a phase winding according to an embodiment of the present invention, in any branch 200, a distance in a circumferential direction between adjacent in-slot portions in the same turn is equal to a full pitch. As shown in fig. 8, the slots occupied by the first leg 201 in a phase winding are in the same position as the slots occupied by the second leg 201, such as the slots numbered 4, 5, 10, 11, 16, 17, 22, 23, 47, 46, 41, 40, 35, 34, 29, 28 in fig. 8. The motor winding is a same-slot and same-phase winding. Fig. 8 exemplarily shows a case where the number of slots of the stator core is 48, the number of teeth is 48, and the number of poles of the motor is 8. Fig. 8 illustrates the case where any of the branches 200 is wound in 2 turns in the circumferential direction.
Optionally, with continued reference to fig. 8, in a part of the first branches 201, the sum of the distances spanned in the circumferential direction by the second slot outer end 260 of any one first branch 201 and the second slot outer end 260 of the corresponding second branch 202 is less than the integer pitch; in another part of the first branches 201, the sum of the distances spanned in the circumferential direction by the second groove outer end 260 of any one first branch 201 and the second groove outer end 260 of the corresponding second branch 202 is greater than the integral distance.
For example, as shown in fig. 8, the second outer end 260 of the first branch 201 spans from the slot No. 41 to the slot No. 44, and the second outer end 260 of the corresponding second branch 202 spans from the slot No. 46 to the slot No. 44, so that the sum of the distances spanned is the distance (i.e. 5) from the slot No. 41 to the slot No. 46, which is less than the integer pitch, which is 6; the second slot outer end 260 of the other first branch 201 spans from the slot No. 40 to the slot No. 43, and the second slot outer end 260 of the corresponding second branch 202 spans from the slot No. 47 to the slot No. 43, so the sum of the spanning distances is the distance (i.e. 7) from the slot No. 40 to the slot No. 47, and is greater than the integer pitch.
Optionally, on the basis of the above embodiment, with continued reference to fig. 8, the distances spanned in the circumferential direction by the first and second outer slot ends 210 and 260 of the first branch 201 are both half of the full pitch, the distances spanned in the circumferential direction by the first outer slot end 210 of the second branch 202 are both half of the full pitch, the distance spanned in the circumferential direction by the second outer slot end 260 of a part of the second branch 202 is greater than half of the full pitch, and the distance spanned in the circumferential direction by the second outer slot end 260 of another part of the second branch 202 is less than half of the full pitch. The second outer end 260 of the second branch 202 is reversely twisted and shortened or lengthened, so that the extending end 270 of the second outer end 260 of the first branch 201 and the extending end 270 of the corresponding second outer end 260 of the second branch 202 are located in the same radial direction and adjacent to each other, welding is facilitated, and the use of bus bars and bus bars is reduced.
An embodiment of the utility model provides a motor winding of another kind. Fig. 9 is a schematic structural diagram of another motor winding according to an embodiment of the present invention. Fig. 10 is a schematic structural diagram of another motor stator according to an embodiment of the present invention. Fig. 11 is a schematic structural diagram of a first hairpin coil according to an embodiment of the present invention. Fig. 12 is a schematic structural diagram of a second hairpin coil in a second branch circuit according to an embodiment of the present invention. Fig. 13 is a schematic view illustrating a tiled expansion of another phase winding according to an embodiment of the present invention. On the basis of the above embodiment, the third outer slot turning part 224 includes a third outer slot end 225 and a fourth outer slot end 226, in any third outer slot turning part 224, one end of the third outer slot end 225 far away from the fourth outer slot end 226 is connected to an adjacent fourth inner slot part 223, one end of the fourth outer slot end 226 far away from the third outer slot end 225 is connected to an adjacent third inner slot part 221, and an extending end 270 of the third outer slot end 225 near the fourth outer slot end 226 is located in the same radial direction and connected to an extending end 270 of the fourth outer slot end 226 near the third outer slot end 225. The extension end 270 of the third slot outer end 225 near the fourth slot outer end 226 is located in the same radial direction and adjacent to the extension end 270 of the fourth slot outer end 226 near the third slot outer end 225, facilitating welding.
Referring to fig. 11 and 13, in any branch 200, the first outer slot end 210, the third inner slot portion 221, the second outer slot turn portion 222, the fourth inner slot portion 223 and the third outer slot end 225 at one end of the circulating portion 220 form a first hairpin coil 10, and the first outer slot end 210 and the third outer slot end 226 of the first hairpin coil 10 extend in opposite directions away from each other in the circumferential direction.
As shown in fig. 12 and 13, the fourth out-of-slot end 226 at the other end of the circulating part 220 forms a second card coil 20 with the first in-slot part 230, the first out-of-slot turn 240, the second in-slot part 250, and the second out-of-slot end 260.
In the remainder of the loop portion 220, each adjacent row is connected by a set of: the fourth outer slot end 226, the third inner slot portion 221, the second outer slot turn 222, the fourth inner slot portion 223 and the third outer slot end 225 form a third hairpin coil 30, the third outer slot end 225 and the fourth outer slot end 226 of the third hairpin coil 30 extending in opposite directions in the circumferential direction and away from each other. The third hairpin coil 30 in either branch 200 is the same or similar in structure to the first hairpin coil 10.
In any first branch 201, the fourth slot outer end 226 and the second slot outer end 260 of the second hairpin coil 20 extend in opposite directions in the circumferential direction and away from each other, and the second hairpin coil 20 in the first branch 201 and the first hairpin coil 10 in any branch 200 have the same or similar structure; in any of the second branches 202, the fourth and second slot outer ends 226 and 260 of the second hairpin coil 20 extend in the same direction in the circumferential direction. The second hairpin coil 20 in the second branch 202 corresponds to a structure obtained by reversely twisting an outer end portion of a slot of the first hairpin coil 10 and shortening or lengthening the length of the slot. Optionally, the third and fourth outboard slots 225, 226 in either branch 200 span circumferentially half the pitch distance.
Fig. 9 exemplarily shows a case where the number of slots 52 of the stator core 51 is 96, the number of teeth 53 is 96, the number of poles of the motor is 16, and the number of slots per phase per pole is 2. Fig. 13 exemplarily shows a case where the number of slots 52 of the stator core 51 is 48, the number of teeth 53 is 48, the number of poles of the motor is 8, and the number of slots per phase per pole is 2. Fig. 9 and 13 illustrate the case where any of the branches 200 is wound in 1 turn in the circumferential direction. As shown in fig. 9, all of the hairpin coils in the plurality of branches are arranged in a lap winding manner in the circumferential direction, and of the adjacent two hairpin coils, the part located in the same layer of the slots is located in the adjacent two slots. The motor winding in fig. 9 corresponds to a structure obtained by dividing the continuous coil in the above-described embodiment into a plurality of hairpin coils. The distance of the two in-slot parts of the first hairpin coil in the circumferential direction, the distance of the two in-slot parts of the second hairpin coil in the circumferential direction, and the distance of the two in-slot parts of the third hairpin coil in the circumferential direction are all equal. The present embodiment can reduce the number of types of hairpin coils used, and can reduce the use of bus bars and busbars.
Alternatively, as shown in fig. 9, any of the branches 200 is wound in one turn in the circumferential direction. The branch 200 may be a continuous coil, or may be a structure including a plurality of hairpin coils.
The embodiment of the utility model provides a still another motor winding. Fig. 14 is a schematic structural diagram of a motor winding according to an embodiment of the present invention. Fig. 15 is a schematic diagram of the inner two-layer structure of fig. 14 in the motor winding. Fig. 16 is a schematic structural diagram of another phase winding according to an embodiment of the present invention. Fig. 17 is a schematic view illustrating a tiled expansion of another phase winding according to an embodiment of the present invention. On the basis of the above embodiment, any branch 200 is wound into at least two circles along the circumferential direction, the third in-slot portions 221 of two adjacent circles of any branch 200 are aligned one by one along the radial direction, the fourth in-slot portions of two adjacent circles of any branch 200 are aligned one by one along the radial direction, in any branch 200, the in-slot portions located in different circles are located in different layers, and the in-slot portions of two adjacent circles are located in four adjacent layers.
Fig. 14 exemplarily shows a case where the number of slots 52 of the stator core 51 is 96, the number of teeth 53 is 96, the number of poles of the motor is 16, and the number of slots per phase per pole is 2. Fig. 16 exemplarily shows a case where the number of slots 52 of the stator core 51 is 48, the number of teeth 53 is 48, the number of poles of the motor is 8, and the number of slots per phase per pole is 2. Any branch 200 is wound into at least K circles along the circumferential direction, K is an integer greater than or equal to 2, and the in-slot part of the motor winding is distributed in 2K layers. If any branch 200 is wound into at least two circles along the circumferential direction, each branch of the motor winding includes a plurality of hairpin coils, the slot parts of the hairpin coils of the plurality of branches of the motor winding are radially arranged in multiple layers, each two adjacent layers are a segmented coil group, the motor winding may include a first segmented coil group and at least one second segmented coil group which are radially arranged in a surrounding manner, the first segmented coil group is located at the outermost layer or the innermost layer of the motor winding, the structure of the first segmented coil group is the same as or similar to that of fig. 9, and the structure of the second segmented coil group is the same as or similar to that of fig. 15. As shown in fig. 9, the first segment-type coil set includes a plurality of hairpin coils arranged in a stacked manner, the in-slot portions of any one of the hairpin coils are located in different layers, the in-slot portions located in the same layer are located in two adjacent slots, and in a part of the hairpin coils, the two outer slot ends of any one of the hairpin coils extend in opposite directions in the circumferential direction and are away from each other, such as a first hairpin coil or a third hairpin coil, and in another part of the hairpin coils, the two outer slot ends of any one of the hairpin coils extend in the same direction in the circumferential direction, such as a second hairpin coil. As shown in fig. 15, the second segmented coil group includes a plurality of hairpin coils arranged in a stacked manner, the in-slot portions of any one of the hairpin coils are located in different layers, the in-slot portions located in the same layer of two adjacent hairpin coils are located in two adjacent slots, and the two slot outer end portions of all the hairpin coils extend in opposite directions in the circumferential direction and are away from each other, such as the first hairpin coil or the third hairpin coil. Fig. 14 and 16 exemplarily show that any branch 200 is wound into three turns along the circumferential direction, and the in-slot portion of the motor winding is distributed in six layers along the radial direction. Fig. 17 shows an exemplary case where any of the branches 200 is wound in two turns in the circumferential direction, and the in-slot portions of the motor windings are distributed in four layers in the radial direction. The windings in fig. 14 and 17 are in-phase with the slots. The motor windings may also be out-of-phase windings in the same slot, for example, the continuous coils in fig. 1 and 7 may be replaced by a plurality of sequentially connected hairpin coils.
An embodiment of the utility model provides a motor stator. Referring to fig. 2 or 10, the motor stator includes: stator core 51 and the motor winding that the utility model discloses arbitrary embodiment provided, stator core 51 are provided with a plurality of along the circumference range and along axially extending's groove 52, and the first inslot portion 230, second inslot portion 250, third inslot portion 221 and the fourth inslot portion 223 of branch road are located the groove 52.
Wherein, the teeth 53 are formed between two adjacent grooves 52, and the grooves 52 and the teeth 53 are arranged alternately in turn along the circumferential direction. The embodiment of the utility model provides a motor stator includes the motor winding in above-mentioned embodiment, consequently the embodiment of the utility model provides a motor stator also possesses the beneficial effect that the above-mentioned embodiment described, and this is no longer repeated here.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. An electric machine winding, comprising:
a plurality of branch circuits are arranged on the base plate,
any branch comprises a first out-of-slot end, a circulating part, a first in-slot part, a first out-of-slot turning part, a second in-slot part and a second out-of-slot end which are sequentially connected, wherein the circulating part comprises a third in-slot part, a second out-of-slot turning part, a fourth in-slot part and a third out-of-slot turning part which are sequentially and circularly arranged and connected, the first out-of-slot end is connected with the third in-slot part positioned at one end of the circulating part, and the first in-slot part is connected with the third out-of-slot turning part positioned at the other end of the circulating part;
any branch is wound into at least one circle along the circumferential direction, the in-groove parts of any branch are distributed in at least two layers along the radial direction, the in-groove parts positioned in the same circle occupy two adjacent layers, the third in-groove part positioned in the same circle is positioned in the same layer, the fourth in-groove part positioned in the same circle is positioned in the same layer, and the third in-groove part and the fourth in-groove part of any branch are positioned in different layers; the second in-groove parts of all the branches are positioned in the same layer;
the first outer-slot turning part and the second outer-slot turning part are positioned on one side of the motor, and the first outer-slot end part, the second outer-slot end part and the third outer-slot turning part are positioned on the other side of the motor;
the plurality of branches includes: a plurality of first branches and a plurality of second branches;
the extending directions of the first groove outer end and the second groove outer end of any first branch in the circumferential direction are opposite and close to each other;
the extension directions of the first groove outer end part and the second groove outer end part of any second branch in the circumferential direction are the same;
the extending directions of the first groove outer end of the first branch and the first groove outer end of the second branch in the circumferential direction are the same;
the extending directions of the second groove outer end of the first branch and the second groove outer end of the second branch in the circumferential direction are opposite and close to each other;
the in-groove parts of any two first branches are positioned in different grooves, and the in-groove parts of any two second branches are positioned in different grooves;
the first branch circuits and the second branch circuits are in one-to-one correspondence, and the extending ends of the outer end parts of the second grooves of the first branch circuits and the corresponding extending ends of the outer end parts of the second grooves of the second branch circuits are located in the same radial direction and are adjacent to each other.
2. An electric machine winding according to claim 1, wherein in any of the branches, adjacent in-slot portions in the same turn are circumferentially spaced by a distance equal to the full pitch.
3. The electrical machine winding of claim 2,
in a part of the first branches, the sum of the distances spanned by the second groove outer end of any one first branch and the second groove outer end of the corresponding second branch in the circumferential direction is less than the integral distance;
in another part of the first branches, the sum of the distances spanned by the second groove outer end of any one first branch and the second groove outer end of the corresponding second branch in the circumferential direction is greater than the integral distance.
4. An electric machine winding according to claim 1, characterized in that in any of the branches, the third in-slot portions in the same turn are at different distances in the circumferential direction from the adjacent two fourth in-slot portions thereof, the distance in the circumferential direction between the adjacent two third in-slot portions in the same turn is equal to 2 times the integer distance, and the distance in the circumferential direction between the adjacent two fourth in-slot portions in the same turn is equal to 2 times the integer distance.
5. The winding for an electrical machine of claim 1, wherein the plurality of legs for forming the same phase winding includes two first legs and two second legs.
6. An electrical machine winding according to claim 2 or 4, wherein any of the legs is a continuous coil.
7. The winding of an electric motor according to claim 2 or 4, wherein the third outer slot turning part comprises a third outer slot end and a fourth outer slot end, in any of the third outer slot turning parts, one end of the third outer slot end, which is far away from the fourth outer slot end, is connected with an adjacent fourth inner slot part, one end of the fourth outer slot end, which is far away from the third outer slot end, is connected with an adjacent third inner slot part, and an extension end of the third outer slot end, which is close to the fourth outer slot end, is located in the same radial direction and adjacent to an extension end of the fourth outer slot end, which is close to the third outer slot end;
in any branch, the first out-of-slot end, the third in-slot portion, the second out-of-slot turning portion, the fourth in-slot portion and the third out-of-slot end which are positioned at one end of the circulating portion form a first hairpin coil, and the first out-of-slot end and the third out-of-slot end of the first hairpin coil extend in opposite directions in the circumferential direction and are far away from each other; a fourth slot outer end part positioned at the other end of the circulating part forms a second hairpin coil together with the first slot inner part, the first slot outer turning part, the second slot inner part and the second slot outer end part;
in the rest of the cyclic part, each group of adjacent permutations is connected: a third hairpin coil is formed by a fourth slot outer end part, a third slot inner part, a second slot outer turning part, a fourth slot inner part and a third slot outer end part, and the extension directions of the third slot outer end part and the fourth slot outer end part of the third hairpin coil in the circumferential direction are opposite and far away;
in any one first branch circuit with the integral distance, the extending directions of the fourth slot outer end part and the second slot outer end part of the second hairpin coil in the circumferential direction are opposite and far away;
in any one second branch, the extension directions of the fourth slot outer end part and the second slot outer end part of the second hairpin coil in the circumferential direction are the same.
8. An electric machine winding according to claim 1, wherein any of the branches is wound in a circumferential direction into one turn.
9. An electric machine winding according to claim 2 or 4, wherein any branch is wound into at least two turns along the circumferential direction, the third in-slot portions of two adjacent turns of any branch are aligned one by one in the radial direction, the fourth in-slot portions of two adjacent turns of any branch are aligned one by one in the radial direction, the in-slot portions of different turns in any branch are located in different layers, and the in-slot portions of two adjacent turns are located in four adjacent layers.
10. An electric machine stator, comprising: stator core and an electric machine winding according to any of claims 1-9, said stator core being provided with a plurality of circumferentially arranged and axially extending slots, the first, second, third and fourth in-slot portions of the legs being located in the slots.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921698767.0U CN210327195U (en) | 2019-10-11 | 2019-10-11 | Motor winding and motor stator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921698767.0U CN210327195U (en) | 2019-10-11 | 2019-10-11 | Motor winding and motor stator |
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| CN210327195U true CN210327195U (en) | 2020-04-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024018580A1 (en) * | 2022-07-21 | 2024-01-25 | 株式会社 東芝 | Stator and rotating electric machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024018580A1 (en) * | 2022-07-21 | 2024-01-25 | 株式会社 東芝 | Stator and rotating electric machine |
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Effective date of registration: 20211123 Address after: 300300 Building 1, block B, No. 1, Xishi Road, pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee after: Tianjin Songzheng Auto Parts Co.,Ltd. Address before: No.1, Xishi Road, Tianjin Binhai New Area Free Trade Zone (Airport Economic Zone) Patentee before: TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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Address after: Free House R&D Building, No. 69, West 11th Road, Tianjin Free Trade Pilot Zone (Airport Economic Zone), Binhai New Area, Tianjin 300300 Patentee after: BorgWarner Powertrain (Tianjin) Co.,Ltd. Address before: 300300 Building 1, block B, No. 1, Xishi Road, pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee before: Tianjin Songzheng Auto Parts Co.,Ltd. |