CN213846350U - Stator and motor - Google Patents
Stator and motor Download PDFInfo
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- CN213846350U CN213846350U CN202022840527.9U CN202022840527U CN213846350U CN 213846350 U CN213846350 U CN 213846350U CN 202022840527 U CN202022840527 U CN 202022840527U CN 213846350 U CN213846350 U CN 213846350U
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Abstract
The utility model relates to a motor field discloses a stator and motor, the stator includes: a stator core including a plurality of stator slots; the three-phase stator winding comprises a plurality of hairpin conductors which are connected among the stator slots in a penetrating manner, the parts of the hairpin conductors penetrating into the stator slots are in-slot conductor sections, and a plurality of parallel branches are formed in each phase winding; for any one of the in-slot conductor segments, another in-slot conductor segment corresponding to the in-slot conductor segment exists, so that the two in-slot conductor segments have the same position relative to the rotor magnetic pole and are positioned in different parallel branches of the same-phase winding; and in the three-phase stator winding, the spans of the hairpin conductors are equal. Through the technical scheme of the utility model, can avoid producing the circulation between a plurality of parallelly connected branches of each phase winding, promote motor efficiency and rated performance to the use kind of reducible hairpin wire improves production efficiency.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to stator and motor.
Background
With the development of new energy, motors with 4 layers, 6 layers and 8 layers of hairpin conductors have appeared in the automobile industry at present, stator windings of most motors are only connected in parallel in 1 way or 2 ways, and the power requirement of permanent magnet synchronous motors for automobiles is difficult to meet, so that the increase of the number of parallel branches of the stator windings becomes an inevitable choice for increasing the power of the motors.
However, under the condition of multiple parallel branches, because the positions of the hairpin conductors between the branches relative to the rotor magnetic steel are different, the hairpin conductors are influenced by the magnetic field of the magnetic steel, and voltage difference exists between the branches, so that circulation is formed. Particularly, the circulation phenomenon is more remarkable for the motor with multiple layers of hairpin conductors. The existence of the circulation can increase the additional copper loss and the dragging loss of the motor, reduce the efficiency of the motor and seriously affect the rated performance of the motor.
SUMMERY OF THE UTILITY MODEL
To prior art's above-mentioned defect or not enough, the utility model provides a stator and motor can avoid producing the circulation between a plurality of parallelly connected branch roads of each phase winding, and can reduce the use kind of hairpin wire to promote motor efficiency, rated performance and production efficiency.
To achieve the above object, the first aspect of the present invention provides a stator, comprising:
a stator core including a plurality of stator slots; and
the three-phase stator winding comprises a plurality of hairpin conductors which are connected among a plurality of stator slots in a penetrating manner, the parts of the hairpin conductors penetrating into the stator slots are in-slot conductor sections, and a plurality of parallel branches are formed in each phase winding;
for any one of the in-slot conductor segments, another in-slot conductor segment corresponding to the in-slot conductor segment exists, so that the two in-slot conductor segments have the same position relative to the rotor magnetic pole and are positioned in different parallel branches of the same-phase winding; and
in the three-phase stator winding, the spans of the hairpin conductors are equal.
Optionally, the hairpin conductor includes a hairpin inserting section and a hairpin welding section connected to both axial ends of the in-slot conductor section, and the stator further includes a transition connection conductor, and a portion of the hairpin welding section is connected by the transition connection conductor.
Optionally, said transition connection wire is connected between said hairpin welded segments extending from said in-slot wire segments at different positions relative to the rotor poles; and/or the transition connection lead is connected between the hairpin welded segments extending from the in-slot lead segments at the same position relative to the rotor poles.
Optionally, the hairpin conductor includes a hairpin inserting section and a hairpin welding section connected to both axial ends of the in-slot conductor section, and the winding outlet ends of the three-phase stator winding are arranged on the same axial side as the hairpin welding section.
Optionally, a plurality of the in-slot wire segments in each of the stator slots are arranged layer by layer in the radial direction, for any one of the in-slot wire segments in any one of the stator slots, there is one of the in-slot wire segments located in another one of the stator slots corresponding thereto, so that the positions of the two stator slots with respect to the rotor magnetic poles are the same, and the number of in-slot layers where the two in-slot wire segments are located is the same and located in different parallel branches of the in-phase winding.
Optionally, in each phase winding of the three-phase stator winding, each parallel branch passes through all layer number positions in the stator slot.
Optionally, the number of the stator slots is 48, 8 layers of the in-slot conductor segments penetrate into each stator slot, and the stator is configured to be matched with a motor with the motor pole number of 8.
Optionally, each hairpin conductor has a span of 7.
Optionally, each phase winding of the three-phase stator winding has 2 or 4 parallel branches formed therein.
A second aspect of the present invention provides a motor, comprising the above-mentioned stator.
According to the above technical scheme, to the utility model discloses in arbitrary one inslot wire section, all can find in another parallelly connected branch road of cophase winding another inslot wire section the same with it for the position of rotor magnetic pole, because the influence that receives the rotor magnetic pole is the same, there is not the voltage difference between these two inslot wire sections, consequently can not produce the circulation, and say from whole, because all there is aforementioned position corresponding relation between the whole inslot wire section, just also can avoid producing the circulation between a plurality of parallelly connected branch roads of each cophase winding, thereby reduce the additional copper loss and the drag loss of motor, promote motor efficiency and rated performance. In addition, the spans of the hairpin conductors adopted by the three-phase stator winding are equal, so that the use types of the hairpin conductors can be reduced, the winding speed can be improved, and the production efficiency can be improved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a plan view of a stator according to an embodiment of the present invention, in which each phase winding of a three-phase winding includes 4 parallel branches;
FIG. 2 is an enlarged fragmentary view of the winding weld side of the stator of FIG. 1;
FIG. 3 is a perspective view of the stator of FIG. 1;
FIG. 4 is an enlarged fragmentary view of the stator of FIG. 3 illustrating an end winding configuration corresponding to that shown in FIG. 2;
fig. 5 is a plan view of another stator according to an embodiment of the present invention, in which each phase winding of the three-phase winding includes 2 parallel branches;
FIG. 6 is an enlarged fragmentary view of the winding weld side of the stator of FIG. 5;
FIG. 7 is a perspective view of the stator of FIG. 5;
FIG. 8 is an enlarged fragmentary view of the stator of FIG. 7 illustrating an end winding configuration corresponding to that shown in FIG. 6;
fig. 9 is a plan view of another stator according to an embodiment of the present invention, in which each phase winding of the three-phase winding includes 4 parallel branches;
fig. 10 is a schematic diagram of the arrangement of in-slot wire segments between the parallel legs of the B-phase winding of fig. 9 under each two pairs of rotor poles.
Description of reference numerals:
1 stator core and 2 hairpin conductors
3 transition connecting wire
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The invention will be described in detail below with reference to the accompanying drawings in conjunction with exemplary embodiments.
A first exemplary embodiment of the present invention provides a stator including a stator core and a three-phase stator winding. The stator core comprises a plurality of stator slots, the three-phase stator winding comprises a plurality of hairpin conductors which are connected among the stator slots in a penetrating mode, each hairpin conductor comprises an in-slot conductor section penetrating into the stator slot and hairpin inserting sections and hairpin welding sections which are connected to the two axial ends of the in-slot conductor section, and a plurality of parallel branches are formed in each phase winding of the three-phase stator winding.
In the same phase winding, for any two in-slot conductor segments belonging to different parallel branches, no voltage difference exists between the two in-slot conductor segments theoretically, but because the positions of the two in-slot conductor segments in the traditional motor relative to the rotor magnetic pole are not necessarily the same, when the relative positions are different, the influence of the magnetic field of the rotor magnetic pole on the two in-slot conductor segments can be different, so that the voltage difference exists between the two in-slot conductor segments, and a circulating current is formed between the two in-slot conductor segments. The existence of the circulation can increase the additional copper loss and the dragging loss of the motor, reduce the efficiency of the motor and seriously affect the rated performance of the motor.
Therefore, in order to solve the circulating current problem, the stator of the exemplary embodiment uses an innovative winding manner, so that for any one in-slot conductor segment, there is another in-slot conductor segment corresponding to the in-slot conductor segment, and the corresponding relationship is as follows: the two in-slot wire segments are in the same position relative to the rotor poles and are located in different parallel branches of the in-phase winding.
For example, for a motor with multiple layers of hairpin conductors, that is, a motor in which multiple in-slot conductor segments in each stator slot are arranged layer by layer in the radial direction, the same position of two in-slot conductor slots with respect to a rotor magnetic pole specifically means: and for any in-slot wire segment in any stator slot, one in-slot wire segment which is positioned in another stator slot and corresponds to the in-slot wire segment exists, so that the positions of the two stator slots relative to the rotor magnetic pole are the same, and the in-slot layers where the two in-slot wire segments are positioned are the same and are positioned in different parallel branches of the same-phase winding. And more specifically, in each phase winding of the three-phase stator winding, each parallel branch passes through all of the number of layers within the stator slot.
As will now be explained in more detail with reference to fig. 9 and 10, the stator in the figure is a stator in a 48-slot 8-pole machine, i.e. the stator core 1 of the stator comprises 48 stator slots and is numbered sequentially for all stator slots, with a rotor pole number of 8 (i.e. a pole pair number of 4). In addition, the stator comprises 8 layers of hairpin conductors, and threading positions in the slots from the 1 st layer to the 8 th layer are defined in the same stator slot from inside to outside in the radial direction. Each phase winding of the three-phase stator winding comprises 4 parallel branches, and the three-phase stator winding adopts two kinds of hairpin conductors for winding, wherein one kind of hairpin conductor is provided with a span of 6, and the other kind of hairpin conductor is provided with a span of 4 and is a different-layer cross-line. The different-layer overline means: the two in-slot conductor segments in the same hairpin conductor are positioned in-slot threading positions with different layers except for threading different stator slots. That is, the stator in the figure uses hairpin conductors of 1-7 different-layer overlines and hairpin conductors of 1-5 different-layer overlines. The three-phase stator winding conforms to the winding principle innovative in the present exemplary embodiment.
Taking the B-phase winding as an example, specifically, the B-phase winding includes a branch B1, a branch B2, a branch B3, and a branch B4.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B1 are in turn:
2 groove 1 layer, 8 groove 2 layer, 15 groove 1 layer, 19 groove 2 layer, 26 groove 1 layer, 32 groove 2 layer, 39 groove 1 layer, 43 groove 2 layer, 2 groove 3 layer, 8 groove 4 layer, 15 groove 3 layer, 19 groove 4 layer, 26 groove 3 layer, 32 groove 4 layer, 39 groove 3 layer, 43 groove 4 layer, 2 groove 5 layer, 8 groove 6 layer, 15 groove 5 layer, 19 groove 6 layer, 26 groove 5 layer, 32 groove 6 layer, 39 groove 5 layer, 43 groove 6 layer, 2 groove 7 layer, 8 groove 8 layer, 15 groove 7 layer, 19 groove 8 layer, 26 groove 7 layer, 32 groove 8 layer, 39 groove 7 layer, 43 groove 8 layer.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B2 are in turn:
3 groove 1 layers, 7 groove 2 layers, 14 groove 1 layers, 20 groove 2 layers, 27 groove 1 layers, 31 groove 2 layers, 38 groove 1 layers, 44 groove 2 layers, 3 groove 3 layers, 7 groove 4 layers, 14 groove 3 layers, 20 groove 4 layers, 27 groove 3 layers, 31 groove 4 layers, 38 groove 3 layers, 44 groove 4 layers, 3 groove 5 layers, 7 groove 6 layers, 14 groove 5 layers, 20 groove 6 layers, 27 groove 5 layers, 31 groove 6 layers, 38 groove 5 layers, 44 groove 6 layers, 3 groove 7 layers, 7 groove 8 layers, 14 groove 7 layers, 20 groove 8 layers, 27 groove 7 layers, 31 groove 8 layers, 38 groove 7 layers, 44 groove 8 layers.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B3 are in turn:
2 groove 8 layers, 44 groove 7 layers, 37 groove 8 layers, 33 groove 7 layers, 26 groove 8 layers, 20 groove 7 layers, 13 groove 8 layers, 9 groove 7 layers, 2 groove 6 layers, 44 groove 5 layers, 37 groove 6 layers, 33 groove 5 layers, 26 groove 6 layers, 20 groove 5 layers, 13 groove 6 layers, 9 groove 5 layers, 2 groove 4 layers, 44 groove 3 layers, 37 groove 4 layers, 33 groove 3 layers, 26 groove 4 layers, 20 groove 3 layers, 13 groove 4 layers, 9 groove 3 layers, 2 groove 2 layers, 44 groove 1 layers, 37 groove 2 layers, 33 groove 1 layers, 26 groove 2 layers, 20 groove 1 layers, 13 groove 2 layers, 9 groove 1 layers.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B4 are in turn:
1 groove 8 layer, 45 groove 7 layer, 38 groove 8 layer, 32 groove 7 layer, 25 groove 8 layer, 21 groove 7 layer, 14 groove 8 layer, 8 groove 7 layer, 1 groove 6 layer, 45 groove 5 layer, 38 groove 6 layer, 32 groove 5 layer, 25 groove 6 layer, 21 groove 5 layer, 14 groove 6 layer, 8 groove 5 layer, 1 groove 4 layer, 45 groove 3 layer, 38 groove 4 layer, 32 groove 3 layer, 25 groove 4 layer, 21 groove 3 layer, 14 groove 4 layer, 8 groove 3 layer, 1 groove 2 layer, 45 groove 1 layer, 38 groove 2 layer, 32 groove 1 layer, 25 groove 2 layer, 21 groove 1 layer, 14 groove 2 layer, 8 groove 1 layer.
It should be noted that, since the arrangement of the in-slot conductor segments between the parallel branches is the same under each two pairs of rotor magnetic poles, the arrangement of the in-slot conductor segments between the parallel branches under the two pairs of rotor magnetic poles is only analyzed below. For the analysis of the parallel branches of the a-phase winding and the C-phase winding, reference may be made to the B-phase winding, and for the sake of brevity, no specific description is made here.
Specifically, under the two pairs of rotor poles illustrated in fig. 10, the slot threading positions of the slot conductor segments corresponding to the hairpin conductors in the branch B1 are in turn:
2 grooves 1 layer, 8 grooves 2 layer, 15 grooves 1 layer, 19 grooves 2 layer, 2 grooves 3 layer, 8 grooves 4 layer, 15 grooves 3 layer, 19 grooves 4 layer, 2 grooves 5 layer, 8 grooves 6 layer, 15 grooves 5 layer, 19 grooves 6 layer, 2 grooves 7 layer, 8 grooves 8 layer, 15 grooves 7 layer, 19 grooves 8 layer.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B2 are in turn:
3 grooves 1 layer, 7 grooves 2 layer, 14 grooves 1 layer, 20 grooves 2 layer, 3 grooves 3 layer, 7 grooves 4 layer, 14 grooves 3 layer, 20 grooves 4 layer, 3 grooves 5 layer, 7 grooves 6 layer, 14 grooves 5 layer, 20 grooves 6 layer, 3 grooves 7 layer, 7 grooves 8 layer, 14 grooves 7 layer, 20 grooves 8 layer.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B3 are in turn:
2 groove 8 layers, 20 groove 7 layers, 13 groove 8 layers, 9 groove 7 layers, 2 groove 6 layers, 20 groove 5 layers, 13 groove 6 layers, 9 groove 5 layers, 2 groove 4 layers, 20 groove 3 layers, 13 groove 4 layers, 9 groove 3 layers, 2 groove 2 layers, 20 groove 1 layers, 13 groove 2 layers, 9 groove 1 layers.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B4 are in turn:
1 groove 8 layer, 21 groove 7 layer, 14 groove 8 layer, 8 groove 7 layer, 1 groove 6 layer, 21 groove 5 layer, 14 groove 6 layer, 8 groove 5 layer, 1 groove 4 layer, 21 groove 3 layer, 14 groove 4 layer, 8 groove 3 layer, 1 groove 2 layer, 21 groove 1 layer, 14 groove 2 layer, 8 groove 1 layer.
It can be seen that under the two pairs of rotor poles illustrated in fig. 10, for any one in-slot conductor segment in any one stator slot, there is a corresponding one in-slot conductor segment in the other stator slot, so that the positions of the two stator slots relative to the rotor poles are the same, and the in-slot layers where the two in-slot conductor segments are located are the same and are located in different parallel branches of the B-phase winding. For example, the slot conductor segment of the branch B4 is penetrated in the slot 8 layer 1, and correspondingly, the slot conductor segment of the branch B2 is penetrated in the slot 8 layer 7, the slot conductor segment of the branch B3 is penetrated in the slot 8 layer 13, and the slot conductor segment of the branch B1 is penetrated in the slot 8 layer 19, so that the positions of the slot 1, the slot 7, the slot 13 and the slot 19 with respect to the rotor magnetic pole (N pole or S pole) are the same, and the slot conductor segments in the 4 slots are all located at the threading positions in the slot 8 layer, and therefore, the influence of the magnetic field of the rotor magnetic pole is the same, and a circular current cannot be generated between the slot conductor segments in the 4 slots. And because the in-slot conductor segments at other positions have similar corresponding relations, circulation currents cannot be generated among 4 parallel branches of the B-phase winding as a whole.
In an embodiment, the types of the hairpin conductors can be further reduced, that is, only one hairpin conductor can be adopted for winding in the three-phase stator winding, and the spans of the hairpin conductors are equal, so that the winding speed is improved, and the production efficiency is improved.
In the case of winding with only one type of hairpin conductor, two hairpin welding segments, which could otherwise be welded directly, may be caused to protrude from two stator slots having a large distance, respectively, and cannot be welded directly. Therefore, the stator can be further provided with a transitional connecting wire with any length, and two ends of the transitional connecting wire can be respectively connected with two hairpin welding sections with larger intervals, so that the problems are effectively solved. Of course, for two hairpin welding segments with a small distance, a transition connection wire may also be used for connection, and the present exemplary embodiment is not limited.
For two hairpin welding sections connected by a transition connection wire, the two hairpin welding sections can respectively extend out of two in-slot wire sections with different positions relative to the rotor magnetic pole, and can also respectively extend out of two in-slot wire sections with the same positions relative to the rotor magnetic pole. For example, in a motor with multiple layers of hairpin conductors, i.e., a motor in which the plurality of intra-slot conductor segments in each stator slot are arranged layer by layer in the radial direction, for two hairpin welding segments connected by a transition connection conductor, both can extend from two intra-slot conductor segments located in the same number of layers, respectively, or from two intra-slot conductor segments located in different numbers of layers, respectively. In other words, the transitional connecting wires can be routed in the same layer of crossing manner and also in different layers of crossing manner.
In addition, it should be noted that the outer end of the hairpin welding section is a terminal of the hairpin conductor, so if the winding outlet end of the three-phase stator winding and the hairpin insertion section are arranged on the same axial side (i.e., the winding outlet end and the hairpin welding section are arranged on opposite axial sides), the winding outlet end and the hairpin welding section need to be connected by an additional special-shaped conductor, thereby making the winding structure of the three-phase stator winding more complex. Therefore, the winding outlet end of the three-phase stator winding and the hairpin welding section are preferably arranged on the same axial side in the exemplary embodiment, so that the winding structure is simplified, the winding speed is increased, and the production efficiency is improved.
Referring to the embodiment shown in fig. 1 to 4, the stator is a stator in a 48-slot 8-pole motor, that is, the stator core 1 of the stator includes 48 stator slots, all the stator slots are numbered sequentially, and the number of rotor magnetic poles is 8 (that is, the number of pole pairs is 4). In addition, the stator comprises 8 layers of hairpin conductors, and threading positions in the slots from the 1 st layer to the 8 th layer are defined in the same stator slot from inside to outside in the radial direction. Each phase winding of the three-phase stator winding comprises 4 parallel branches, and the three-phase stator winding only adopts the hairpin conductor 2 with the span of 7 for winding and conforms to the winding principle innovative in the exemplary embodiment. And with specific reference to fig. 2 and 4, the stator is provided with transition connecting wires 3 at a first position and a second position (a perspective view is not shown at the second position), and the transition connecting wires 3 at the first position and the second position are all routed in a different-layer cross-over manner. And moreover, the winding outlet end of the three-phase stator winding and the hairpin welding section are arranged at the same axial side.
The winding method in this embodiment can also achieve the purpose of eliminating the circulating current between the parallel branches, and the analysis method can refer to the foregoing, and details are not described herein, and specific routing sequences of the B-phase winding are listed below, where the B-phase winding includes a branch B1, a branch B2, a branch B3, and a branch B4.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B1 are in turn:
9 groove 1 layer, 2 groove 2 layer, 45 groove 1 layer, 38 groove 2 layer, 32 groove 1 layer, 25 groove 2 layer, 20 groove 1 layer, 13 groove 2 layer, 8 groove 3 layer, 1 groove 4 layer, 44 groove 3 layer, 37 groove 4 layer, 33 groove 3 layer, 26 groove 4 layer, 21 groove 3 layer, 14 groove 4 layer, 8 groove 5 layer, 1 groove 6 layer, 44 groove 5 layer, 37 groove 6 layer, 33 groove 5 layer, 26 groove 6 layer, 21 groove 5 layer, 14 groove 6 layer, 9 groove 7 layer, 2 groove 8 layer, 45 groove 7 layer, 38 groove 8 layer, 32 groove 7 layer, 25 groove 8 layer, 20 groove 7 layer, 13 groove 8 layer.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B2 are in turn:
8 groove 8 layers, 15 groove 7 layers, 20 groove 8 layers, 27 groove 7 layers, 31 groove 8 layers, 38 groove 7 layers, 43 groove 8 layers, 2 groove 7 layers, 7 groove 6 layers, 14 groove 5 layers, 19 groove 6 layers, 26 groove 5 layers, 32 groove 6 layers, 39 groove 5 layers, 44 groove 6 layers, 3 groove 5 layers, 7 groove 4 layers, 14 groove 3 layers, 19 groove 4 layers, 26 groove 3 layers, 32 groove 4 layers, 39 groove 3 layers, 44 groove 4 layers, 3 groove 3 layers, 8 groove 2 layers, 15 groove 1 layers, 20 groove 2 layers, 27 groove 1 layers, 31 groove 2 layers, 38 groove 1 layers, 43 groove 2 layers, 2 groove 1 layers.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B3 are in turn:
7 groove 8 layers, 14 groove 7 layers, 19 groove 8 layers, 26 groove 7 layers, 32 groove 8 layers, 39 groove 7 layers, 44 groove 8 layers, 3 groove 7 layers, 8 groove 6 layers, 15 groove 5 layers, 20 groove 6 layers, 27 groove 5 layers, 31 groove 6 layers, 38 groove 5 layers, 43 groove 6 layers, 2 groove 5 layers, 8 groove 4 layers, 15 groove 3 layers, 20 groove 4 layers, 27 groove 3 layers, 31 groove 4 layers, 38 groove 3 layers, 43 groove 4 layers, 2 groove 3 layers, 7 groove 2 layers, 14 groove 1 layers, 19 groove 2 layers, 26 groove 1 layers, 32 groove 2 layers, 39 groove 1 layers, 44 groove 2 layers, and 3 groove 1 layers.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B4 are in turn:
8 groove 1 layer, 1 groove 2 layer, 44 groove 1 layer, 37 groove 2 layer, 33 groove 1 layer, 26 groove 2 layer, 21 groove 1 layer, 14 groove 2 layer, 9 groove 3 layer, 2 groove 4 layer, 45 groove 3 layer, 38 groove 4 layer, 32 groove 3 layer, 25 groove 4 layer, 20 groove 3 layer, 13 groove 4 layer, 9 groove 5 layer, 2 groove 6 layer, 45 groove 5 layer, 38 groove 6 layer, 32 groove 5 layer, 25 groove 6 layer, 20 groove 5 layer, 13 groove 6 layer, 8 groove 7 layer, 1 groove 8 layer, 44 groove 7 layer, 37 groove 8 layer, 33 groove 7 layer, 26 groove 8 layer, 21 groove 7 layer, 14 groove 8 layer.
Referring to the embodiment shown in fig. 5 to 8, the stator is a stator in a 48-slot 8-pole motor, that is, the stator core 1 of the stator comprises 48 stator slots, all the stator slots are numbered sequentially, and the number of rotor magnetic poles is 8 (that is, the number of pole pairs is 4). In addition, the stator comprises 8 layers of hairpin conductors, and threading positions in the slots from the 1 st layer to the 8 th layer are defined in the same stator slot from inside to outside in the radial direction. Each phase winding of the three-phase stator winding comprises 2 parallel branches, and the three-phase stator winding only adopts the hairpin conductor 2 with the span of 7 for winding and conforms to the winding principle innovative in the exemplary embodiment. And referring to fig. 6 and 8 in particular, the stator is provided with a transition connecting wire 3 at a first position, for example, and the transition connecting wire 3 at the first position is routed in a different-layer cross-line manner, so that the transition connecting wire 3 in the present embodiment has a larger circumferential span and can be connected to two hairpin welding segments with a longer distance than the transition connecting wire 3 at the first position in the previous 4-way parallel embodiment. And moreover, the winding outlet end of the three-phase stator winding and the hairpin welding section are arranged at the same axial side.
The winding method in this embodiment can also achieve the purpose of eliminating the circulating current between the parallel branches, and the analysis method can refer to the foregoing description, and details of the routing sequence of the phase B winding are listed below, where the phase B winding includes a branch B1 and a branch B2.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B1 are in turn:
9 groove 1 layer, 2 groove 2 layer, 45 groove 1 layer, 38 groove 2 layer, 33 groove 1 layer, 26 groove 2 layer, 21 groove 1 layer, 14 groove 2 layer, 8 groove 3 layer, 1 groove 4 layer, 44 groove 3 layer, 37 groove 4 layer, 32 groove 3 layer, 25 groove 4 layer, 20 groove 3 layer, 13 groove 4 layer, 8 groove 5 layer, 1 groove 6 layer, 44 groove 5 layer, 37 groove 6 layer, 32 groove 5 layer, 25 groove 6 layer, 20 groove 5 layer, 13 groove 6 layer, 9 groove 7 layer, 2 groove 8 layer, 45 groove 7 layer, 38 groove 8 layer, 33 groove 7 layer, 26 groove 8 layer, 21 groove 7 layer, 14 groove 8 layer, 7 groove 8 layer, 14 groove 7 layer, 19 groove 8 layer, 26 groove 7 layer, 31 groove 8 layer, 38 groove 7 layer, 43 groove 8 layer, 2 groove 7 layer, 8 groove 6 layer, 15 groove 5 layer, 20 groove 6 layer, 27 groove 5 layer, 32 groove 5 layer, 6 layer, 39 groove 3 layer, 15 groove 3 layer, 7 layer, 27 groove 4 groove 3 layer, 27 groove 4 layer, 27 groove 3 layer, 27 groove 4 layer, 8 layer, 27 groove 3 layer, 25 groove 3 layer, 8 layer, 25 groove 3 layer, 9 groove 4 groove 7 layer, 8 groove 7 layer, 2 groove 7 layer, 8 groove 7 layer, 2 groove 7 layer, 15 groove 7 layer, 2 groove 6 layer, 2 groove 7 layer, 2 groove 6 layer, 2 groove 7 layer, 2 groove 3 layer, 2 groove 6 layer, 15 groove 5 groove 3 layer, 2 groove 3 layer, 2 groove 6 layer, 2 groove 3 layer, 2 groove 6 layer, 1 groove 6 layer, 2 groove 6, 32 groove 4 layer, 39 groove 3 layer, 44 groove 4 layer, 3 groove 3 layer, 7 groove 2 layer, 14 groove 1 layer, 19 groove 2 layer, 26 groove 1 layer, 31 groove 2 layer, 38 groove 1 layer, 43 groove 2 layer, 2 groove 1 layer.
The in-slot threading positions of the in-slot conductor segments corresponding to the plurality of hairpin conductors in the branch B2 are in turn:
8-groove 1 layer, 1-groove 2 layer, 44-groove 1 layer, 37-groove 2 layer, 32-groove 1 layer, 25-groove 2 layer, 20-groove 1 layer, 13-groove 2 layer, 9-groove 3 layer, 2-groove 4 layer, 45-groove 3 layer, 38-groove 4 layer, 33-groove 3 layer, 26-groove 4 layer, 21-groove 3 layer, 14-groove 4 layer, 9-groove 5 layer, 2-groove 6 layer, 45-groove 5 layer, 38-groove 6 layer, 33-groove 5 layer, 26-groove 6 layer, 21-groove 5 layer, 14-groove 6 layer, 8-groove 7 layer, 1-groove 8 layer, 44-groove 7 layer, 37-groove 8 layer, 32-groove 7 layer, 25-groove 8 layer, 20-groove 7 layer, 13-groove 8 layer, 8-groove 7 layer, 15-groove 7 layer, 20-groove 8 layer, 27-groove 7 layer, 32-groove 8 layer, 39-groove 7 layer, 44-groove 8 layer, 3-groove 7 layer, 7-groove 6 layer, 14-groove 5 layer, 19-groove 6 layer, 26-groove 5 layer, 31-groove 6 layer, 19-groove 4 layer, 26-groove 7 layer, 26-groove 4 layer, 26-groove 7 layer, 26-groove 6 layer, 7 layer, 6 layer, 26-groove 7 layer, 6 layer, 26 groove 3 groove 4 layer, 9 groove 7 layer, 2 groove 7 layer, 9 groove 7 layer, 2 groove 3 groove 4 layer, 2 groove 3 groove 7 layer, 2 groove 3 groove 4 layer, 9 groove 3 groove 4 layer, 2 groove 3 groove 4 groove 3 groove 7 layer, 2 groove 3 groove 6 layer, 2 groove 6 layer, 9 groove 5 layer, 2 groove 4 layer, 9 groove 7 layer, 2 groove 3 groove 6 layer, 9 groove 4 layer, 2 groove 4 layer, 9 groove 6 layer, 2 groove 6 layer, 9 groove 6 layer, 2 groove 6 layer, 9 groove 6 layer, 2 groove 6 layer, 9 groove 6 layer, 2 groove 6 layer, 9 groove 6 layer, 2 groove 6 layer, 9 groove 6 layer, 2 groove 6 layer, 9 groove 6 layer, 2 groove 6 layer, and the groove 6 layer, 2 groove 6 layer, 31 groove 4 layer, 38 groove 3 layer, 43 groove 4 layer, 2 groove 3 layer, 8 groove 2 layer, 15 groove 1 layer, 20 groove 2 layer, 27 groove 1 layer, 32 groove 2 layer, 39 groove 1 layer, 44 groove 2 layer, 3 groove 1 layer.
The 4-path parallel or 2-path parallel three-phase stator winding can effectively avoid the circulation between the parallel branches, thereby reducing the additional copper consumption and the dragging loss of the motor, improving the efficiency and the rated performance of the motor, saving the use types of the hairpin, and improving the winding speed and the production efficiency. In addition, because the short-distance winding arrangement is used, the counter electromotive force waveform of the motor can be ensured to have good sine property.
The utility model discloses second exemplary embodiment provides a motor, and this motor includes above-mentioned stator, consequently possesses all technological effects brought by above-mentioned stator, and the repetition is no longer repeated here and is repeated.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that, in the above-mentioned embodiments, the various technical features described in the above-mentioned embodiments can be combined in any suitable way without contradiction, and in order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.
Claims (10)
1. A stator, characterized in that the stator comprises:
a stator core (1) comprising a plurality of stator slots; and
the three-phase stator winding comprises a plurality of hairpin conductors (2) which are connected among a plurality of stator slots in a penetrating manner, the parts of the hairpin conductors (2) penetrating into the stator slots are in-slot conductor sections, and a plurality of parallel branches are formed in each phase winding;
for any one of the in-slot conductor segments, another in-slot conductor segment corresponding to the in-slot conductor segment exists, so that the two in-slot conductor segments have the same position relative to the rotor magnetic pole and are positioned in different parallel branches of the same-phase winding; and
in the three-phase stator winding, the spans of the hairpin conductors (2) are equal.
2. The stator according to claim 1, characterized in that the hairpin conductor (2) comprises a hairpin insertion section and a hairpin welding section connected to both axial ends of the in-slot conductor section, and the stator further comprises a transition connection conductor (3), and parts of the hairpin welding sections are connected by the transition connection conductor (3).
3. A stator according to claim 2, characterized in that the transition connection wire (3) is connected between the hairpin welded segments projecting from the in-slot wire segments at different positions relative to the rotor poles; and/or the transition connecting lead (3) is connected between the hairpin welding sections extending from the in-slot lead sections at the same position relative to the rotor poles.
4. The stator according to claim 1, characterized in that the hairpin conductor (2) comprises a hairpin insertion section and a hairpin welding section connected to both axial ends of the in-slot conductor section, the winding outlet ends of the three-phase stator winding being arranged axially on the same side as the hairpin welding section.
5. A stator according to any one of claims 1 to 4, wherein a plurality of the intra-slot conductor segments in each stator slot are arranged layer by layer in a radial direction, and for any one of the intra-slot conductor segments in any one of the stator slots, there is a corresponding one of the intra-slot conductor segments in another one of the stator slots, so that the two stator slots have the same position relative to the rotor poles, and so that the two intra-slot conductor segments have the same number of intra-slot layers and are located in different parallel branches of the in-phase winding.
6. A stator according to claim 5, wherein in each of the three phase stator windings each of the parallel branches passes through all of the number of layers in the stator slot.
7. The stator as claimed in claim 6, wherein the number of the stator slots is 48, 8 layers of the in-slot conductor segments penetrate into each stator slot, and the stator is configured to be used with a motor having a pole number of 8.
8. The stator according to claim 7, characterized in that the span of each hairpin (2) is 7.
9. A stator according to claim 8, wherein 2 or 4 of the parallel branches are formed in each of the three phase stator windings.
10. An electrical machine comprising a stator according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840527.9U CN213846350U (en) | 2020-11-30 | 2020-11-30 | Stator and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840527.9U CN213846350U (en) | 2020-11-30 | 2020-11-30 | Stator and motor |
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| Publication Number | Publication Date |
|---|---|
| CN213846350U true CN213846350U (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022840527.9U Active CN213846350U (en) | 2020-11-30 | 2020-11-30 | Stator and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337033A (en) * | 2021-09-22 | 2022-04-12 | 华为数字能源技术有限公司 | Three-phase flat wire wave winding structure, three-phase motor, power assembly and vehicle |
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2020
- 2020-11-30 CN CN202022840527.9U patent/CN213846350U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337033A (en) * | 2021-09-22 | 2022-04-12 | 华为数字能源技术有限公司 | Three-phase flat wire wave winding structure, three-phase motor, power assembly and vehicle |
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