CN115765251A - Stator module and motor with same - Google Patents
Stator module and motor with same Download PDFInfo
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- CN115765251A CN115765251A CN202211297962.9A CN202211297962A CN115765251A CN 115765251 A CN115765251 A CN 115765251A CN 202211297962 A CN202211297962 A CN 202211297962A CN 115765251 A CN115765251 A CN 115765251A
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Abstract
The invention provides a stator assembly and a motor with the same, wherein the stator assembly comprises a stator core and a coil winding, a stator slot is arranged on the stator core and used for accommodating one part of the coil winding, and the coil winding comprises an internal coil group, a middle coil group and an external coil group; in the same stator slot, the part of the inner coil group, the part of the middle coil group and the part of the outer coil group are sequentially laminated; the inner coil group comprises a first type coil, the middle coil group comprises a second type coil, the outer coil group comprises a second type coil and a third type coil, two effective edges of the first type coil are respectively located in the same layer of different stator slots, two effective edges of the second type coil are respectively located in adjacent layers of different stator slots, two effective edges of the third type coil are respectively located in adjacent layers of different stator slots, the second type coil is in a lap winding mode, and the first type coil and the third type coil are in a wave winding mode.
Description
Technical Field
The invention belongs to the field of motors, and particularly relates to a stator assembly and a motor with the same.
Background
In the related art, a stator assembly of an electric machine generally includes a stator core and coil windings, wherein each coil in the coil windings is often in a wave winding form; on the premise of only adopting a wave winding form, if multiple layers of conductors (or called multiple layers of conductors belonging to effective edges of different coils) are stacked in the same stator slot, the potential difference of the conductors among different layers is higher, so that the interlayer breakdown phenomenon is easy to generate, the insulation damage and the motor short circuit are caused, and the motor fails.
Disclosure of Invention
In view of this, the present invention provides a stator assembly and a motor having the same.
The stator assembly provided by the invention comprises a stator core and a coil winding, wherein a stator slot is arranged on the stator core and used for accommodating one part of the coil winding, and the coil winding comprises an inner coil group, a middle coil group and an outer coil group; in the same stator slot, the part of the inner coil group, the part of the middle coil group and the part of the outer coil group are sequentially laminated; the inner coil group comprises a first type coil, the middle coil group comprises a second type coil, the outer coil group comprises a second type coil and a third type coil, two effective edges of the first type coil are respectively located in the same layer of different stator slots, two effective edges of the second type coil are respectively located in adjacent layers of different stator slots, two effective edges of the third type coil are respectively located in adjacent layers of different stator slots, the second type coil is in a lap winding mode, and the first type coil and the third type coil are in a wave winding mode.
Optionally, a pitch of a portion of the first type of coil is greater than a pole pitch of the stator assembly, a pitch of a portion of the first type of coil is less than the pole pitch of the stator assembly, and a pitch of the second type of coil and the third type of coil is equal to the pole pitch of the stator assembly.
Optionally, in each branch of each phase, at least one second type coil subordinate to the outer coil group is connected with a third type coil subordinate to the outer coil group, the second type coil or the third type coil in the outer coil group is connected with the middle coil group, and the middle coil group is connected with the inner coil group.
Optionally, the first type of coil, the second type of coil, and the third type of coil are flat wire coils, each flat wire coil includes a hairpin portion and an outer slot portion located outside the stator slot, and two effective edges for being respectively placed in different stator slots, the hairpin portions are respectively connected to the two effective edges, and the outer slot portions are respectively connected to the two effective edges and are arranged at intervals;
the outer parts of the two slots of the first type coil are parallel to each other, the outer parts of the two slots of the second type coil extend in different directions and are crossed with each other, and the outer parts of the two slots of the third type coil are parallel to each other; in an expanded view of the coil winding, the outside of the slot of the first type coil extends in a first direction, and the outside of the slot of the third type coil extends in a second direction different from the first direction.
Optionally, N effective edges are stacked in the stator slot, where N is an odd number greater than 3.
Optionally, the pitch of the second type coil is 9, the pitch of a part of the first type coils in the inner coil group is 10, and the pitch of a part of the first type coils in the inner coil group is 7, or
The pitch of a part of the first type coils in the inner coil group is 11, and the pitch of a part of the first type coils is 8.
Alternatively, the development of one phase winding of the coil winding is as shown in fig. 9 to 11, or
The development of one of the coil windings is shown in fig. 15 to 17.
Optionally, the set of outer coils is disposed at a slot bottom of the stator slot.
The invention also provides an electric machine comprising a stator assembly as described in any of the above.
Optionally, the motor is a 54-slot 6-pole three-phase motor, and the motor includes three parallel branches per corresponding coil winding.
In conclusion, by adopting the mode of combining the wave winding form and the lap winding form, the stator assembly provided by the invention has the advantages that the interlayer potential difference is lower, the insulation damage or short circuit caused by interlayer breakdown can be reduced, and the service life of the motor is prolonged; furthermore, the potential difference between the same-phase different branches is reduced, and the magnetic circuits are reasonably arranged, so that the invention can avoid the circulation, reduce the loss and improve the efficiency of the motor; furthermore, when the number of conductor layers in the stator slot is set to be an odd number, the stator assembly provided by the invention is also beneficial to designing a motor with specific power and torque.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of a stator assembly according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an inner coil assembly according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a middle coil assembly according to an embodiment of the invention.
Fig. 4 is a schematic diagram of an external coil assembly according to an embodiment of the invention.
Fig. 5 is a schematic diagram of a first type coil according to a first embodiment of the invention.
Fig. 6 is a diagram illustrating a second type of coil according to a first embodiment of the invention.
Fig. 7 is a diagram illustrating a third type of coil according to an embodiment of the invention.
Fig. 8 is a schematic view of an effective edge stacking arrangement in a stator slot according to an embodiment of the invention.
Fig. 9 is an expanded view of a branch in the coil winding corresponding to U in the first embodiment of the present invention.
Fig. 10 is an expanded view of a branch in the coil winding corresponding to U in the first embodiment of the present invention.
Fig. 11 is an expanded view of a branch in the coil winding corresponding to U in the first embodiment of the present invention.
Fig. 12 is a wiring diagram of a branch in the corresponding coil winding of U in the first embodiment of the present invention.
Fig. 13 is a wiring diagram of a branch in the coil winding corresponding to U in the first embodiment of the present invention.
Fig. 14 is a wiring diagram of a branch in the corresponding coil winding of U in the first embodiment of the present invention.
Fig. 15 is an expanded view of a branch in the coil winding corresponding to U in the second embodiment of the present invention.
Fig. 16 is an expanded view of a branch in the coil winding corresponding to U in the second embodiment of the present invention.
Fig. 17 is an expanded view of a branch in the coil winding corresponding to U in the second embodiment of the present invention.
Fig. 18 is a wiring diagram of a branch in the coil winding corresponding to U in the second embodiment of the present invention.
FIG. 19 is a diagram illustrating a branch circuit of a coil winding corresponding to U in the second embodiment of the present invention
Fig. 20 is a wiring diagram of a branch in the coil winding corresponding to U in the second embodiment of the present invention.
Description of the reference numerals
A-stator core, A1-stator slot, B-coil winding, C-effective edge, D-hairpin portion, and E-slot outside. 1-inner coil set, 2-middle coil set, 3-outer coil set, 4-first type coil, 41-first part, 5-second type coil, 6-third type coil, 61-second part.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The terms first, second and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example one
As shown in fig. 1, the present embodiment provides a stator assembly for an electric machine, which includes a stator core a and a coil winding B, wherein an upper side of the stator core a is a hairpin side, a lower side of the stator core a is a welding side, the stator core a is a hollow cylinder, and a plurality of stator slots A1 axially penetrating through the stator core a are circumferentially spaced. A part of the coil is located in the stator slot A1 and a part of the coil extends from different ends of the stator slot A1, respectively.
In light of the above, all the coils in the coil winding B are flat wire coils, the portion of the coil located in the stator slot A1 is called an effective side C, the portion of the coil extending out of the stator slot A1 is an end portion of the coil, and a single coil includes two effective sides C which are parallel to each other. The part of the single coil extending out of one end of the stator slot A1 is in a V shape with an opening facing the effective side C of the coil, the end of the coil is called a hair clip part D, and the hair clip part D is positioned on the hair clip side; the hairpin part D is respectively connected with the two effective sides C of the coil; meanwhile, the portion of the coil protruding from the other end of the stator slot A1 is referred to as a slot outer portion E, which is located on the welding side; the coil comprises two groove outer parts E besides two effective edges C, wherein the two groove outer parts E are respectively connected with the two effective edges C of the coil into a whole and are arranged at intervals.
The coil winding B in the present embodiment includes three coil groups, i.e., an inner coil group 1, a middle coil group 2, and an outer coil group 3 as illustrated in fig. 2 to 4, respectively, wherein the coils subordinate to the inner coil group 1 have the form of a first-type coil 4 as illustrated in fig. 5; the coils belonging to the middle coil group 2 have the configuration of the second type coil 5 as shown in fig. 6; as shown in fig. 7, a part of the coils subordinate to the external coil group 3 have a form of the second type coil 5, and a part of the coils have a form of the third type coil 6.
With reference to fig. 5 to 7, the two slot exteriors E of the first type coil 4 are parallel to each other, the two slot exteriors E of the third type coil 6 are parallel to each other, and the two slot exteriors E of the second type coil 5 respectively have portions extending in opposite directions from the end of the effective side C, and the two portions form an intersecting posture at one end of the second type coil 5. Furthermore, after the inner coil assembly 1, the middle coil assembly 2 and the outer coil assembly 3 are molded on the stator core a in their entirety, in the development view of the corresponding coil winding B (see fig. 9), the slot outer portion E of the first type coil 4 has a first portion 41 extending along a first direction, the slot outer portion E of the third type coil 6 has a second portion 61 extending along a second direction, and the first direction and the second direction are opposite to each other.
In the present embodiment, the effective side C belonging to the inner coil group 1, the effective side C belonging to the middle coil group 2, and the effective side C belonging to the outer coil group 3 are sequentially stacked in the same stator slot A1; the pitch of a part of the first type coils 4 is greater than the pole distance of the stator assembly, the pitch of a part of the first type coils 4 is smaller than the pole distance of the stator assembly, and two effective edges C of the first type coils 4 are respectively positioned on the same layer in different stator slots A1; the pitch of the second type coil 5 and the third type coil 6 is equal to the pole pitch of the stator assembly, and two effective edges C of the second type coil 5 and the third type coil 6 are used for adjacent layers respectively positioned in different stator slots A1; the second type coil 5 is in a lap winding form, and the first type coil 4 and the third type coil 6 are in a wave winding form; therefore, the potential difference of the conductors among different layers in the stator slot A1 caused by the lap winding mode between the coils is lower than the potential difference of the conductors among different layers in the stator slot A1 when the wave winding mode is adopted between the coils, so that the combination of the wave winding mode and the lap winding mode adopted by the stator assembly of the embodiment can reduce the potential difference among the layers, reduce the insulation damage or short circuit caused by the breakdown among the layers and prolong the service life of the motor. It should be noted that the pitch in this embodiment refers to the slot pitch that one effective side C of a certain coil crosses another effective side C from the hairpin side.
Based on the above setting principle, the present embodiment further provides a 54-slot 6-pole three-phase motor including the stator assembly, wherein the pole pitch is 9, N layers of effective edges C are arranged in each stator slot A1, N is an odd number greater than or equal to 3, and each corresponding coil winding B includes three parallel branches.
As shown in fig. 8, when N =7 and there are the first type coil 4 with the pitch of 10 and the first type coil 4 with the pitch of 7 in the inner coil group 1, one phase in the stator assembly has an expanded view of the coil winding B as shown in fig. 9 to 11, and a coil wiring schematic as shown in fig. 12 to 14; taking the effective side C on the left side of the figure in the same stator slot A1 as the effective side C of the layer 1, for the convenience of understanding, the following briefly describes the embodiment of the above setting principle on the stator assembly:
in the corresponding coil winding B, the inner coil group 1 has a pitch combination of 10, 7. To describe this in more detail, one effective side C of a first type coil 4 is located at the 7 th layer of the 38 th slot, and the other effective side C is located at the 7 th layer of the 48 th slot, that is, the pitch of the first type coil 4 is 10 and both effective sides C are located at the same layer in different stator slots A1; meanwhile, the groove outer portions E to which the two effective sides C are respectively connected each include a first portion 41 extending in a first direction (i.e., downward and rightward in the drawing); the two effective sides C are connected to the second type coil 5 located at the 6 th layer of the 47 th slot (belonging to the intermediate coil group) and the second type coil 5 located at the 6 th layer of the 3 rd slot (belonging to the intermediate coil group), respectively.
Similarly, one effective side C of a first type coil 4 is located at the 7 th layer of the 1 st slot, and the other effective side C is located at the 7 th layer of the 11 th slot, that is, the pitch of the first type coil 4 is 10 and both effective sides C are located at the same layer in different stator slots A1; meanwhile, the groove outer portions E to which the two effective sides C are connected extend downward to the right in the drawing.
Similarly, one effective side C of a first type coil 4 is located at the 7 th layer of the 21 st slot, and the other effective side C is located at the 7 th layer of the 28 th slot, that is, the pitch of the first type coil 4 is 7, and both effective sides C are located at the same layer in different stator slots A1; meanwhile, the groove outer portions E to which the two effective sides C are connected extend downward to the right in the drawing.
It should be noted that, there is no specific arrangement order between the coils of the internal coil group 1 having the corresponding pitch parameters, that is, from the 1 st slot to the 54 th slot, the pitches of the first type coils 4 in the internal coil group 1 may sequentially appear in the order of 10, 7, and 10, for example, the X1A2 branch in fig. 9, or may sequentially appear in the order of 7, 10, and 10, for example, the X2A2 branch in fig. 10.
In the corresponding coil winding B, one effective side C of a third type coil 6 belonging to the outer coil group 3 is located in the 1 st layer of the 38 th slot, and the other effective side C is located in the 2 nd layer of the 47 th slot, that is, the pitch of the third type coil 6 is 9, and the two effective sides C thereof are located in adjacent layers in different stator slots A1, and the slot outer portion E to which the two effective sides C are connected has a second portion 61 extending in the second direction (i.e., downward and leftward in the drawing). One effective side C of a second type coil 5 subordinate to the outer coil group 3 is positioned at the 1 st layer of the 11 th slot, and the other effective side C is positioned at the 2 nd layer of the 20 th slot, that is, the pitch of the second type coil 5 is 9, and the two effective sides C are respectively positioned in adjacent layers in different stator slots A1, meanwhile, one of the outer portions E of the slots respectively connected with the two effective sides C extends towards the lower left in the figure, and the other extends towards the lower right in the figure, and forms an intercrossing posture.
Similarly, one effective side C of a third type coil 6 belonging to the outer coil group 3 is located at the 1 st layer of the 20 th slot, and the other effective side C is located at the 2 nd layer of the 29 th slot; one effective side C of a second type coil 5 belonging to the outer coil group 3 is located at the 1 st layer of the 10 th slot, and the other effective side C is located at the 2 nd layer of the 19 th slot. The effective side C of the second coil 5, which is positioned at the 1 st layer of the 10 th slot, is connected with the effective side C of the third coil 6, which is positioned at the 1 st layer of the 20 th slot; the effective side C of the second type coil 5 located at the 19 th slot 2 nd layer is connected with a second type coil 5 located at the 10 th slot 3 rd layer, and the second type coil 5 located at the 10 th slot 3 rd layer is further connected with the second type coil 5 (belonging to the middle coil group 2) of the 19 th slot 6 th layer.
From the above, the effective sides C of the layer 1 conductor and the layer 2 conductor which form the 20 th slot are both subordinate to the external coil group 3; based on this requirement, from the 3 rd layer of the 20 th slot to the 6 th layer of the 20 th slot, the effective sides C for forming the four layers of conductors are respectively subordinate to different second-type coils 5, one of the second-type coils 5 closest to the inner coil group 1 (i.e., the first-type coil 4 corresponding to the 6 th layer of the 20 th slot) needs to be set as subordinate to the middle coil group 2, and since the middle coil group 2 and the outer coil group 3 both include the second-type coil 5, the remaining three second-type coils 5 can be regarded as subordinate to both the middle coil group 2 and the outer coil group 3.
Thus, the arrangement of the U phase can be completed based on fig. 9-14 according to the fact that the three phases of the motor are respectively the U phase, the V phase and the W phase, and the arrangement of the other two phases can be arranged according to the motor principle staggered groove array.
Alternatively, the external coil group 3 is disposed at the slot bottom of the stator slot A1, the internal coil group 1 is disposed at a position close to the opening of the stator slot A1, and the coil in the external coil group 3 is used as the circuit leading-out position of the stator assembly, so that the leading-out operation of the coil winding can be simplified, and the leading-out wire can be prevented from interfering with other parts of the motor (for example, other coils in the stator assembly).
Example two
The second embodiment also provides a stator assembly and a motor having the same, and the present embodiment is different from the first embodiment in that when the first type coil 4 with a pitch of 11 and the first type coil 4 with a pitch of 8 are in the inner coil group 1 in the stator assembly, one phase in the stator assembly has a winding development view as shown in fig. 15 to 17, and a coil wiring diagram as shown in fig. 18 to 20. In the corresponding coil winding B, the inner coil group 1 has a pitch combination of 11, 8 in which there is no particular arrangement order between the coils having the corresponding pitch parameters.
In conclusion, by adopting the mode of combining the wave winding form and the lap winding form, the stator assembly provided by the invention has the advantages that the interlayer potential difference is lower, the insulation damage or short circuit caused by interlayer breakdown can be reduced, and the service life of the motor is prolonged; furthermore, the potential difference between the same-phase different branches is reduced, and the magnetic circuits are reasonably arranged, so that the invention can avoid the circulation, reduce the loss and improve the efficiency of the motor; furthermore, when the number of conductor layers in the stator slot A1 is set to be an odd number, the stator assembly provided by the invention is also beneficial to designing a motor with specific power and torque.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A stator assembly comprises a stator core and a coil winding, wherein a stator slot is arranged on the stator core and is used for accommodating a part of the coil winding, and the stator assembly is characterized in that the coil winding comprises an inner coil group (1), a middle coil group (2) and an outer coil group (3); in the same stator slot, the part of the inner coil group (1), the part of the middle coil group (2) and the part of the outer coil group (3) are sequentially laminated; the inner coil group (1) comprises a first type coil (4), the middle coil group (2) comprises a second type coil (5), the outer coil group (3) comprises a second type coil (5) and a third type coil (6), two effective edges of the first type coil (4) are located in the same layer of different stator slots respectively, two effective edges of the second type coil (5) are located in adjacent layers of different stator slots respectively, two effective edges of the third type coil (6) are located in adjacent layers of different stator slots respectively, the second type coil (5) is in a lap winding mode, and the first type coil (4) and the third type coil (6) are in a wave winding mode.
2. The stator assembly according to claim 1, characterized in that a pitch of a part of the first type of coils (4) is larger than a pole pitch of the stator assembly, a pitch of a part of the first type of coils (4) is smaller than the pole pitch of the stator assembly, and a pitch of the second type of coils (5) and the third type of coils (6) is equal to the pole pitch of the stator assembly.
3. Stator assembly according to claim 2, characterized in that in each branch of each phase at least one coil of the second type (5) belonging to the outer set (3) is connected to a coil of the third type (6) belonging to the outer set (3), the coil of the second type (5) or the coil of the third type (6) in the outer set (3) being connected to the middle set (2), and the middle set (2) being connected to the inner set (1).
4. A stator assembly according to claim 3, characterized in that the first type of coil (4), the second type of coil (5) and the third type of coil (6) are flat wire coils, which comprise a hairpin portion and a slot outer portion located outside the stator slots, and two effective edges for being respectively inserted into different stator slots, the hairpin portion being respectively connected to the two effective edges, the slot outer portions being respectively connected to the effective edges and being arranged at a distance from each other;
the two groove exteriors of the first type coil (4) are parallel to each other, the two groove exteriors of the second type coil (5) extend in opposite directions and cross each other, and the two groove exteriors of the third type coil (6) are parallel to each other; in an expanded view of the coil winding, the outside of the slot of the first type coil (4) extends in a first direction and the outside of the slot of the third type coil (6) extends in a second direction different from the first direction.
5. The stator assembly of claim 4 wherein the stator slot inner laminations are provided with N layers of active edges, N being an odd number greater than 3.
6. The stator assembly according to claim 5, characterized in that the pitch of the second type of coils (5) is 9, the pitch of a part of the first type of coils (4) in the inner set of coils (1) is 10, the pitch of a part of the first type of coils (4) is 7, or
The pitch of a part of the first type coils (4) in the inner coil group (1) is 11, and the pitch of a part of the first type coils (4) is 8.
7. The stator assembly of claim 6, wherein an unfolded view of one of the coil windings is as shown in fig. 9 to 11, or
The development of one of the coil windings is shown in fig. 15 to 17.
8. The stator assembly according to claim 1, characterized in that the outer set of coils (3) is arranged at the bottom of the stator slots.
9. An electrical machine comprising a stator assembly according to any of claims 1-8 above.
10. The motor of claim 9 wherein said motor is a 54 slot 6 pole three phase motor comprising three parallel legs per corresponding coil winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297962.9A CN115765251A (en) | 2022-10-21 | 2022-10-21 | Stator module and motor with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297962.9A CN115765251A (en) | 2022-10-21 | 2022-10-21 | Stator module and motor with same |
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| CN115765251A true CN115765251A (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211297962.9A Pending CN115765251A (en) | 2022-10-21 | 2022-10-21 | Stator module and motor with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115967209A (en) * | 2023-03-16 | 2023-04-14 | 博格华纳汽车零部件（武汉）有限公司 | 54-slot 6-pole hairpin type flat wire winding and motor |
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2022
- 2022-10-21 CN CN202211297962.9A patent/CN115765251A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115967209A (en) * | 2023-03-16 | 2023-04-14 | 博格华纳汽车零部件（武汉）有限公司 | 54-slot 6-pole hairpin type flat wire winding and motor |
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