CN111969750A - Interior and outer cladding stator module and motor - Google Patents
Interior and outer cladding stator module and motor Download PDFInfo
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- CN111969750A CN111969750A CN202010793730.7A CN202010793730A CN111969750A CN 111969750 A CN111969750 A CN 111969750A CN 202010793730 A CN202010793730 A CN 202010793730A CN 111969750 A CN111969750 A CN 111969750A
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- 238000005253 cladding Methods 0.000 title description 3
- 239000004020 conductor Substances 0.000 claims abstract description 375
- 238000004804 winding Methods 0.000 claims abstract description 34
- 239000011295 pitch Substances 0.000 claims description 90
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 238000005452 bending Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses an internal and external wrapping type stator assembly, which comprises stator windings, wherein each phase winding of the stator windings comprises two coil ring groups which are staggered with Y stator slot positions in the circumferential direction of a stator core, and Y is a pole pitch; each coil ring group comprises Q coil rings which are staggered with one stator slot position in sequence in the circumferential direction of the stator core, and Q is more than or equal to 2; the coil ring is formed by connecting P magnetic pole coils which are uniformly distributed along the circumferential direction of the stator in series, each magnetic pole coil is composed of a plurality of hairpin conductors, and P is the number of magnetic pole pairs; the hairpin conductor comprises a hairpin main body which is bent integrally in a U shape; the magnetic pole coil comprises at least two rows of hairpin conductor groups which are arranged in a layered mode in the radial direction and an outer-span hairpin conductor, and two leg portions of the outer-span hairpin conductor are respectively located on the innermost layer and the outermost layer in the stator slot where the outer-span hairpin conductor is located. The internal and external wrapping type stator assembly and the motor have the advantages of reasonable structure, convenience in winding, capability of meeting the requirements of various application scenes and the like.
Description
Technical Field
The invention relates to the technical field of motors, in particular to an inner-outer wrapping type stator assembly and a motor.
Background
The motor (including the motor and the generator) is a device for converting electric energy into mechanical energy (or converting mechanical energy into electric energy) according to the principle of electromagnetic induction, and can be used as a power source or a power generation device of various electric appliances such as household appliances, various machines such as electric vehicles and electric automobiles. The motors can be classified into dc motors and ac motors according to the kinds of their operating power sources, and the ac motors can be classified into single-phase motors and multi-phase motors (e.g., three-phase motors). The motor comprises a stator and a rotor, and a winding is arranged in a stator core slot of the stator. The traditional winding is formed by winding a round conducting wire, although the winding process is relatively simple, the space utilization rate in an iron core groove is low, useless copper at the end is wasted greatly, the power density is low, and the winding is gradually replaced by a flat copper wire or a rectangular-section copper wire.
At present, flat type copper wire motor wide application is in new energy automobile, and its winding mainly adopts the whole hairpin conductor that is the sectional type of U-shaped bending to connect and forms, and for adapting to different work occasions, the winding mode of flat type copper wire motor also diverse along with constantly refining of application scene, needs constantly richen the stator module and the motor of flat type copper wire motor on the basis of current winding mode.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a rational in infrastructure, the coiling is convenient, can adapt to interior and outer cladding stator module and motor that multiple application scene needs.
In order to solve the technical problems, the invention adopts the following technical scheme:
an inside and outside wrapping type stator assembly comprises a cylindrical stator core, wherein a plurality of stator slots are uniformly distributed on the stator core along the circumferential direction of the stator core, and stator windings are arranged in the stator slots; the motor is characterized in that each phase of winding of the stator winding comprises two groups of coil ring groups which are staggered with Y stator slot positions in the circumferential direction of the stator core, and Y is a pole pitch; each coil ring group comprises Q coil rings which are staggered with one stator slot position in sequence in the circumferential direction of the stator core, and Q is more than or equal to 2; the coil ring is formed by connecting P magnetic pole coils which are uniformly distributed along the circumferential direction of the stator in series, each magnetic pole coil is composed of a plurality of hairpin conductors, and P is the number of magnetic pole pairs; the hairpin conductor comprises a hairpin main body which is bent integrally in a U shape, the hairpin main body comprises two leg parts which are arranged in parallel and heads which are connected to one ends of the two leg parts, and the other ends of the two leg parts are respectively provided with a supporting leg; the magnetic pole coil comprises at least two rows of hairpin conductor groups which are arranged in a layered mode in the radial direction and a hairpin conductor which spans outside, the at least one row of hairpin conductor groups comprises N hairpin conductors with the same number of layers at intervals of the leg parts, the other row of hairpin conductor groups comprises one hairpin conductor or N hairpin conductors with the same number of layers at intervals of the leg parts, and N is 2 or an odd number which is larger than 2; the two leg parts of the hairpin conductor of the outer span are respectively positioned at the innermost layer and the outermost layer in the stator slot where the hairpin conductor is positioned.
By adopting the structure, the hairpin conductors with different layer numbers of the leg parts can be arranged in the stator slot according to the requirements of different application scenes, because each magnetic pole coil comprises at least two rows of hairpin conductor groups, and the leg part interval layer numbers of N hairpin conductors on at least one row of hairpin conductor groups are the same, all the hairpin conductors on the same hairpin conductor group are the same, so that the number of dies of the hairpin conductors can be reduced, the cost of the dies is reduced, and the manufacturing efficiency of the hairpin conductors is improved. In addition, the hairpin conductor sets arranged side by side can be assembled simultaneously, so that the assembly time is saved, and the assembly efficiency is improved.
Furthermore, the pitches of all the hairpin conductors on the hairpin conductor group are Ya, the pitches of the outer-span hairpin conductors are Yb, and Ya is Y-1; on the same magnetic pole coil, the hair-sending conductors of all the hair-sending conductor sets are located at the same magnetic pole position, and Yb is Y-1 or Yb is Y +1 when the hair-sending conductors which are spanned outwards are wave-shaped conductors with two support legs which are deflected and bent along the opposite direction in the width direction of the hair-sending main body; and on the same magnetic pole coil, when all the hair-sending conductors of all the hair-sending conductor groups are distributed at least two magnetic pole positions, Yb (Ya) and Y-1.
Furthermore, the pitches of all the hairpin conductors on the hairpin conductor group are Ya, Ya is Y-1, the outer-spanning hairpin conductors comprise a hairpin conductor with the pitch of Yb-1 and a hairpin conductor with the pitch of Yb + Q-1, and on the same coil ring, the hairpin conductor with the pitch of Yb-1 and the hairpin conductor with the pitch of Yb + Q-1 are circumferentially arranged on the magnetic pole coils which are sequentially spaced; in Q coil rings arranged on circumferentially sequentially adjacent slot positions on each coil ring group, among Q outer-span hair clip conductors sequentially adjacent to each other, in the clockwise or anticlockwise direction, the pitch of the hair clip conductor positioned in the first stator slot is Yb + Q-1, and the pitch of other hair clip conductors is Yb-1; on the same magnetic pole coil, the hair-sending conductors of all the hair-sending conductor sets are located at the same magnetic pole position, and Yb is Y-1 or Yb is Y +1 when the hair-sending conductors which are spanned outwards are wave-shaped conductors with two support legs which are deflected and bent along the opposite direction in the width direction of the hair-sending main body; and on the same magnetic pole coil, when all the hair-sending conductors of all the hair-sending conductor groups are distributed at least two magnetic pole positions, Yb (Ya) and Y-1.
In this way, in the circumferential direction, the magnetic pole coils on the Q coil loops sequentially alternate positions once when passing through the positions of the Q outer-span hair-sending conductors which are adjacent in sequence, so that the currents in the Q coil loops are balanced, and thus, the circulating current is eliminated.
Furthermore, Q is 2 and P is an even number, the pitches of all the hairpin conductors on the hairpin conductor group are Ya, and in any coil loop, the hairpin conductors of the outer span all comprise at least one pair of radially oppositely arranged hairpin conductors with the pitch of Yb +1 and hairpin conductors with the pitch of Yb-1, the paired hairpin conductors with the pitch of Yb +1 and hairpin conductors with the pitch of Yb-1 are uniformly distributed along the circumferential direction, and the pitches of the other hairpin conductors of the outer span are Yb; in two coil rings arranged on circumferentially adjacent groove positions, the hairpin conductor with the pitch of Yb +1 on one coil ring and the hairpin conductor with the pitch of Yb-1 on the other coil ring are positioned in circumferentially adjacent groove positions; on the same magnetic pole coil, the hair-sending conductors of all the hair-sending conductor sets are located at the same magnetic pole position, and Yb is Y-1 or Yb is Y +1 when the hair-sending conductors which are spanned outwards are wave-shaped conductors with two support legs which are deflected and bent along the opposite direction in the width direction of the hair-sending main body; and on the same magnetic pole coil, when all the hair-sending conductors of all the hair-sending conductor groups are distributed at least two magnetic pole positions, Yb (Ya) and Y-1.
Because the coil rings with the same current direction are usually arranged in circumferentially adjacent slots, a mechanical angle of 360/Z degrees always exists between the two coil rings, Z is the total number of slots, so that a potential difference exists between the two coil rings to form a circular current, by adopting the structure, a pair of the hairpin conductors with the Yb +1 pitch and the hairpin conductors with the Yb-1 pitch are arranged in the radial direction of the two coil rings, compared with the coil rings formed by all the hairpin conductors and the hairpin conductors with the same pitch, one half of combined coils on the coil rings can keep the original position, and the other half of the combined coils move by one slot pitch clockwise or anticlockwise. And the combined coils on the same side on the two coil rings respectively move one slot pitch in the opposite direction, so that the position relation of the combined coils on the two coil rings is in axial symmetry arrangement, and one half of the combined coils on the two coil rings have a + 360/Z-degree mechanical angle difference and the other half has a-360/Z-degree mechanical angle difference no matter in the clockwise direction or the anticlockwise direction, thereby avoiding the potential difference between the two coil rings from forming a circulating current. In the structure, the hairpin conductors of the outer span can be assembled only after the parallel hairpin conductor groups are completely assembled in place, and the hairpin conductors with the pitch of Yb +1 and the hairpin conductors with the pitch of Yb-1 are arranged on the hairpin conductors of the outer span, so that the problem of circulation can be solved without increasing the assembly difficulty. And the difficulty of assembly is lower for the hairpin conductors arranged at the outer span compared to arranging the hairpin conductors of pitches Yb +1 and Yb-1 on the side-by-side groups of hairpin conductors.
Furthermore, the magnetic pole coil comprises two rows of hairpin conductor groups which are arranged in a layered mode in the radial direction and a hairpin conductor which spans outside, the two rows of hairpin conductor groups are located at the same magnetic pole position in the radial direction of the stator core, one row of hairpin conductor groups comprises two hairpin conductors which are arranged side by side, and two leg parts of the two hairpin conductors are located on the 2 nd layer to the 4 th layer and the 3 rd layer to the 5 th layer of the stator slot where the two hairpin conductors are located respectively; the other row of hairpin conductor groups comprise hairpin conductors, and the two leg parts are respectively positioned on the 6 th layer to the 7 th layer in the stator slot where the two leg parts are respectively positioned; two leg parts of the externally-crossed hairpin conductor are respectively positioned on the 1 st layer to the 8 th layer in the stator slot where the hairpin conductor is positioned; the hairpin conductors and the two rows of hairpin conductor groups which are spanned outside are respectively positioned at two circumferentially adjacent magnetic pole positions of the stator core, the support legs positioned on the 1 st and 2 nd layers or the support legs positioned on the 7 th and 8 th layers deflect and bend towards opposite directions, and the support legs on the other two sequentially adjacent layers deflect and bend towards each other and are connected.
Furthermore, the magnetic pole coil comprises two rows of hairpin conductor groups which are arranged in a layered manner in the radial direction and a hairpin conductor which spans outside, the two rows of hairpin conductor groups are positioned at two adjacent magnetic pole positions in the circumferential direction of the stator core, one row of hairpin conductor groups comprises two hairpin conductors which are arranged side by side, and two leg parts on the two hairpin conductors are respectively positioned on the 2 nd to 4 th layers and the 3 rd to 5 th layers in the stator slot where the two hairpin conductors are respectively positioned; the other row of hairpin conductor group comprises hairpin conductors of which two leg parts are respectively positioned at 6 th to 7 th layers in the stator slots, the two leg parts and the outer-span hairpin conductor are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts of the outer-span hairpin conductor are respectively positioned at 1 st to 8 th layers in the stator slots; the support legs on the 1 st and 2 nd layers or the 7 th and 8 th layers are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
Furthermore, the magnetic pole coil comprises two rows of hairpin conductor groups which are arranged in a layered manner in the radial direction and a hairpin conductor which spans outside, the two rows of hairpin conductor groups are positioned at the same magnetic pole position in the radial direction of the stator core, and each of the two rows of hairpin conductor groups comprises two hairpin conductors which are arranged side by side, two leg parts on the two hairpin conductors on one row of hairpin conductor group are respectively positioned on the 2 nd to 4 th layer and the 3 rd to 5 th layer in the stator slot where the two hairpin conductors are respectively positioned, and two leg parts on the two hairpin conductors on the other row of hairpin conductor group are respectively positioned on the 6 th to 8 th layer and the 7 th to 9 th layer in the stator slot where the two hairpin conductors are respectively positioned; the hairpin conductors and the two rows of hairpin conductor groups which are in outer span are respectively positioned at two magnetic pole positions which are adjacent in the circumferential direction of the stator core, and the two leg parts are respectively positioned on the 1 st layer to the 10 th layer in the stator slot where the two leg parts are respectively positioned; the support legs on the layers 1-2 or the layers 9-10 are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
Furthermore, the magnetic pole coil comprises two rows of hairpin conductor groups arranged in a layered manner in the radial direction and a hairpin conductor spanning outside, the two rows of hairpin conductor groups are positioned at two adjacent magnetic pole positions in the circumferential direction of the stator core, and the two rows of hairpin conductor groups respectively comprise two hairpin conductors arranged side by side, wherein two leg parts on two hairpin conductors on one row of hairpin conductor group are respectively positioned on the 2 nd to 4 th layer and the 3 rd to 5 th layer in the stator slot where the two hairpin conductors are respectively positioned, and two leg parts on two hairpin conductors on the other row of hairpin conductor group are respectively positioned on the 6 th to 8 th layer and the 7 th to 9 th layer in the stator slot where the two hairpin conductors are respectively positioned; the outward-spanning hairpin conductors and one row of hairpin conductor groups are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts are respectively positioned on the 1 st layer to the 10 th layer in the stator slot where the two leg parts are respectively positioned; the support legs on the layers 1-2 or the layers 9-10 are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
Furthermore, the magnetic pole coil comprises two rows of hairpin conductor groups arranged in a layered manner in the radial direction and a hairpin conductor spanning outside, wherein one row of the hairpin conductor groups comprises 2 hairpin conductors arranged side by side, the other row of the hairpin conductor groups comprises 3 hairpin conductors, two leg parts of the 3 hairpin conductors are respectively positioned on the 2 nd to 5 th layer, the 3 rd to 6 th layer and the 4 th to 7 th layer in the stator slot where the two leg parts are respectively positioned, the leg parts of the hairpin conductors positioned on the 2 nd to 5 th layer and the 4 th to 7 th layer are positioned at the same magnetic pole position in the radial direction of the stator core, and the leg parts of the hairpin conductors positioned on the 3 rd to 6 th layer are respectively positioned at two magnetic pole positions adjacent to each other in the circumferential direction of the stator core, wherein one magnetic pole position is the same as the magnetic pole position of the 2 side by side hairpin conductors, and the two leg parts of the 2 hairpin conductors are respectively positioned on the 8 th to 10 th layer and the 9 th to 11 th layer in the stator slot A layer; the hairpin conductor of the outer span and the hairpin conductor of the leg part positioned on the 3 rd to 6 th layers are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts are respectively positioned on the 1 st to 12 th layers in the stator slot where the two leg parts are respectively positioned; the support legs on the layers 1-2 or the layers 11-12 are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
An electrical machine comprising an inner and outer wrap stator assembly as described above.
In conclusion, the internal and external wrapping type stator assembly and the motor have the advantages of reasonable structure, convenience in winding, capability of meeting the requirements of various application scenes and the like.
Drawings
Fig. 1 is a schematic structural view of a stator winding of embodiment 1.
Fig. 2 is a schematic structural view of the stator winding of fig. 1 from another perspective.
Fig. 3 is a schematic view of the structure of one phase winding and the stator core in embodiment 1.
Fig. 4 is a schematic diagram of the phase winding in fig. 3.
Fig. 5 is a schematic structural view of the coil loop a in embodiment 1.
Fig. 6 is a schematic structural view of the coil ring b in embodiment 1.
Fig. 7 to 10 are schematic structural views of the coil ring and the stator core in embodiment 1.
Fig. 11 and 12 are schematic views of the connection states of the hairpin conductors f having pitches Yb +1 and Yb-1.
Fig. 13 and 14 are schematic structural views of a stator winding of embodiment 4.
Fig. 15 is a schematic structural view of a coil loop set in embodiment 4.
Fig. 16 is a schematic structural view of a coil ring in embodiment 4.
Fig. 17 and 18 are schematic structural views of a coil ring and a stator core in embodiment 4.
FIGS. 19 and 20 are schematic views showing the connection states of the hairpin conductors f having pitches Yb +1 and Yb-1 in example 4.
Fig. 21 is a schematic structural view of a stator winding of embodiment 5.
Fig. 22 and 23 are schematic structural views of phase windings in embodiment 5.
Fig. 24 is a schematic structural view of a coil loop set in embodiment 5.
Fig. 25 is a schematic structural view of a coil ring in embodiment 5.
Fig. 26 and 27 are schematic structural views of a coil ring and a stator core in embodiment 5.
Fig. 28 and 29 are schematic top views of fig. 26 and 27, respectively.
Detailed Description
The present invention will be described in further detail with reference to examples.
The motor comprises a shell (not shown in the figure) and a stator assembly arranged in the shell, wherein the stator assembly comprises a cylindrical stator core 1, the stator core 1 is provided with a plurality of stator slots uniformly distributed along the circumferential direction of the stator core, stator windings 2 are arranged in the stator slots, and the stator windings 2 comprise three phase windings arranged on the stator core 1, as shown in figures 1 and 2. In fig. 1, the upper end of the stator core 1 is an insertion side (or crown side), and the lower end is a connection side (or welding side).
Example 1:
in this embodiment, the number of pairs P of poles is 4, the number Q of slots per pole per phase is 2, the number Z of slots of stator slots on the stator core is 48, the number of conductor layers accommodated in each stator slot is 10, and the pole pitch Y is 6.
For convenience of description, one of the phase windings is selected for illustration, and as shown in fig. 3 and 4, the phase winding includes two coil ring groups, namely a coil ring group a and a coil ring group b, which are mutually shifted by Y stator slot positions in the circumferential direction of the stator core. As shown in fig. 5, the coil ring group a includes 2 coil rings a1 and a2 which are staggered by one stator slot position in the circumferential direction of the stator core; as shown in fig. 6, the coil ring group b includes 2 coil rings b1 and b2 which are shifted by one stator slot position in the circumferential direction of the stator core; as shown in fig. 7-10, coil loop a1, coil loop a2, coil loop b1 and coil loop b2 are formed by connecting 4 magnetic pole coils c uniformly arranged along the circumference of the stator core in series, each magnetic pole coil is composed of a plurality of hairpin conductors, each hairpin conductor comprises a hairpin main body which is bent integrally in a U shape, each hairpin main body comprises two leg portions arranged in parallel and a head connected to one end of each leg portion, and two support legs are respectively arranged at the other ends of the leg portions.
In this embodiment, the pole coil c includes two rows of hairpin conductor groups g1 and g2 layered in the radial direction, and one outer-crossing hairpin conductor f; the hairpin conductor group g1 and the hairpin conductor group g2 are located at the same magnetic pole position, and the hairpin conductor f and the hairpin conductor group g1 and g2 which cross outwards are respectively located at two magnetic pole positions adjacent in the circumferential direction of the stator core.
As shown in fig. 7, the hairpin conductor group g1 includes two hairpin conductors gf1 with the same number of leg spacing layers, and the two hairpin conductors gf1 are arranged side by side; the hairpin conductor group g2 comprises two hairpin conductors gf2 with the same number of leg spacing layers, and the two hairpin conductors gf2 are arranged side by side.
In this embodiment, each of the hairpin conductors gf1 and gf2 is an O-shaped conductor having an annular shape as a whole, and the two legs of the O-shaped conductor are bent and deflected toward the middle in the width direction of the hairpin body and are arranged at a shifted interval in the thickness direction of the hairpin body. The number of the interval layers of the two leg parts of the hairpin conductor gf1 and the hairpin conductor gf2 is 1, namely, the two leg parts of the two hairpin conductors gf1 in the hairpin conductor group g1 are respectively positioned in the 2 nd to 4 th layers and the 3 rd to 5 th layers of the stator slot in which the two leg parts are respectively positioned, and the two leg parts of the two hairpin conductors gf2 in the hairpin conductor group g2 are respectively positioned in the 6 th to 8 th layers and the 7 th to 9 th layers of the stator slot in which the two leg parts are respectively positioned. The two leg parts of the hairpin conductor f which is out-spanned are respectively positioned on the 1 st layer and the 10 th layer in the stator slot where the hairpin conductor f is positioned.
In this embodiment, the pitch Ya of the hairpin conductor gf1 and the hairpin conductor gf2 is 5, that is, Ya is Y-1, and the pitch of the hairpin conductor f is Yb is 7, that is, Yb is Y + 1.
Generally, when the flat copper wire motor is assembled, the hairpin main bodies bent in a U shape are inserted into corresponding stator slots, after all the stator slots are fully inserted with the hairpin main bodies, the leg parts on the connecting side are bent integrally layer by adopting bending equipment, and when the leg parts are bent integrally, all the leg parts on the same layer are bent into the same slot position along clockwise or anticlockwise deflection.
The number of layers and the pitch of the intervals of the two leg parts of all the hairpin conductors in the same hairpin conductor group are the same, for example, all the hairpin conductors gf1 in the hairpin conductor group g1 and all the hairpin conductors gf2 in the hairpin conductor group g2, so that the number of dies of the hairpin conductors can be reduced, the die cost is reduced, and the manufacturing efficiency of the hairpin conductors is improved. And the hairpin conductor groups arranged side by side can be assembled simultaneously, so that the assembly time is saved, and the assembly efficiency is improved.
In this embodiment, the number of layers between the two leg portions of the hairpin conductor gf1 and the hairpin conductor gf2 is the same, and the pitch is also the same, and the hairpin bodies of both can be processed by using the same set of mold. And all the pitches of the hairpin conductors f are 7, and the two leg parts are respectively positioned at the 1 st layer and the 10 th layer of the stator slot, namely all the hairpin conductors f can be processed by adopting the same set of mould. Therefore, the hairpin conductor in the embodiment only needs to be produced by two sets of dies, and the die sinking cost is favorably reduced.
Example 2:
the main difference between the present embodiment and embodiment 1 is that the hairpin conductors f of the outer span include hairpin conductors with a pitch of Yb +1 and hairpin conductors with a pitch of Yb-1, and on the same coil ring, the hairpin conductors with a pitch of Yb +1 and the hairpin conductors with a pitch of Yb-1 are sequentially and alternately arranged along the circumferential direction of the coil ring. In two coil loops arranged on circumferentially adjacent slots, namely the coil loop a1 and the coil loop a2, the hairpin conductor with the pitch of Yb +1 on one coil loop and the hairpin conductor with the pitch of Yb-1 on the other coil loop are positioned in the circumferentially adjacent slots;
since Yb +1 and Y + 6, the hairpin conductor f of the outer span in this embodiment has two types of hairpin conductors f with a pitch of 6 and a pitch of 8, and the hairpin conductor f of the outer span needs to use two types of dies, compared with embodiment 1, although one type of die is added, the types of dies are still few compared with other similar products.
In addition, with the solution of this embodiment, in a coil loop, the hairpin conductor f with the pitch of 8 is necessarily shifted outward by one slot relatively to the hairpin conductor f with the pitch of 7 in embodiment 1, and the whole hairpin conductor set joined in this direction is shifted toward this direction by one slot, as shown in fig. 11. On the other coil loop in the adjacent slot, since the hairpin conductor with the pitch of 6 in the adjacent slot is necessarily shifted relatively inward by one slot in comparison with the hairpin conductor f with the pitch of 7 in embodiment 1, the set of hairpin conductors joined in this direction is shifted toward this direction by one slot as a whole, as shown in fig. 12. So that the two pole coils at the same pole position on the two coil loops exchange relative positions with each other, and at the next pole position in the circumferential direction, the pole coils on the two coil loops exchange positions again. Thus, in the circumferential direction, half of two coil rings are different from each other by a mechanical angle of +360/Z degrees, and the other half of the two coil rings are different from each other by a mechanical angle of-360/Z degrees, so that the two coil rings can be prevented from generating potential difference to form circulation current.
Example 3:
the main difference between this embodiment and embodiment 1 is that each coil loop constitutes a branch, and on the same coil loop, the hairpin conductors f of the outer span include a pair of hairpin conductors with a pitch of 8 and hairpin conductors with a pitch of 6, which are arranged opposite to each other in the radial direction, the paired hairpin conductors with a pitch of 8 and hairpin conductors with a pitch of 6 are uniformly distributed along the circumferential direction, and the pitches of the hairpin conductors of the other outer spans are all 7; in two branches arranged on circumferentially adjacent slots, the hairpin conductor with the pitch of 8 on one branch and the hairpin conductor with the pitch of 6 on the other branch are positioned in the circumferentially adjacent slots.
As in embodiment 2, the hairpin conductors f with the pitch of 8 on one branch and the hairpin conductors f with the pitch of 6 on the other branch are arranged correspondingly, so that half of the two branches differ by a mechanical angle of +360/Z ° and the other half differ by a mechanical angle of-360/Z °, thereby preventing the two coil loops from generating a potential difference to form a loop current.
Example 4:
in the present embodiment, as shown in fig. 13 and 14, the number of pole pairs P is 4, the number of slots per pole and phase Q is 2, the number of slots Z of the stator slot in the stator core is 48, the number of conductor layers accommodated in each stator slot is 12, and the pole pitch Y is 6.
In this embodiment, each phase winding includes two coil ring groups, namely a coil ring group a and a coil ring group b, which are staggered from each other by Y stator slots in the circumferential direction of the stator core. As shown in fig. 15, the coil ring group a includes 2 coil rings a1 and a2 which are staggered by one stator slot position in the circumferential direction of the stator core; the coil ring group b includes 2 coil rings b1 and b2 which are staggered by one stator slot position in the circumferential direction of the stator core. As shown in fig. 16, each of the coil loop a1, the coil loop a2, the coil loop b1 and the coil loop b2 is formed by connecting 4 magnetic pole coils c uniformly distributed along the circumferential direction of the stator core in series, each magnetic pole coil is composed of a plurality of hairpin conductors, each hairpin conductor comprises a hairpin body bent in a U shape integrally, each hairpin body comprises two leg portions arranged in parallel and a head portion connected to one end of each leg portion, and the other end of each leg portion is provided with a support leg.
The magnetic pole coil c comprises two rows of hairpin conductor groups g1 and g2 which are arranged in a layered mode in the radial direction, and an outer-crossing hairpin conductor f; wherein one row of the hairpin conductor groups g1 includes 2 hairpin conductors gf1 arranged side by side, the other row of the hairpin conductor groups g2 includes 3 hairpin conductors gf2, and two leg parts of the 3 hairpin conductors gf2 are respectively positioned at the 2 nd to 5 th layers, the 3 rd to 6 th layers and the 4 th to 7 th layers in the stator slots where the leg parts are positioned, the hairpin conductors of the 2 nd to 5 th layers and the 4 th to 7 th layers are positioned at the same magnetic pole position in the radial direction of the stator core, and the hairpin conductors positioned on the 3 rd to 6 th layers with the leg parts are respectively positioned at two adjacent magnetic pole positions in the circumferential direction of the stator core, one magnetic pole position is the same as the magnetic pole position of 2 side-by-side hairpin conductors gf1, and two leg parts on the 2 hairpin conductors gf1 are respectively positioned on the 8 th to 10 th layers and the 9 th to 11 th layers in the stator slots where the two leg parts are respectively positioned; the hairpin conductor f of the outer span and the hairpin conductor gf2 with the leg parts positioned on the 3 rd to 6 th layers are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts are respectively positioned on the 1 st to 12 th layers in the stator slots where the two leg parts are respectively positioned; the legs on the leg portions on the 1 st to 2 nd layers or the 11 th to 12 th layers are deflected and bent in opposite directions, and the legs on the leg portions on the other two layers adjacent in sequence are deflected and bent towards each other and connected, as shown in fig. 17 and 18.
The hairpin conductors f of the outer span comprise hairpin conductors with the pitch of Yb +1 and hairpin conductors with the pitch of Yb-1, and on the same coil ring, the hairpin conductors with the pitch of Yb +1 and the hairpin conductors with the pitch of Yb-1 are sequentially arranged at intervals in a staggered manner along the circumferential direction of the coil ring. In two coil loops arranged on circumferentially adjacent slots, namely the coil loop a1 and the coil loop a2, the hairpin conductor with the pitch of Yb +1 on one coil loop and the hairpin conductor with the pitch of Yb-1 on the other coil loop are positioned in the circumferentially adjacent slots;
in this embodiment, the pitch Ya of the hairpin conductor gf1 and the hairpin conductor gf2 is 5, that is, Ya is Y-1, the pitch of the outer span hairpin conductor f is Yb +1 is 6 (as shown in fig. 19) and the pitch is Yb +1 is 4 (as shown in fig. 20), that is, Yb is Ya is Y-1.
With the solution of the present embodiment, the hairpin conductor f having the pitch of 6 is necessarily offset relatively outward by one slot in one leg portion with respect to the hairpin conductor f having the pitch of 5(Yb) on one coil loop, so that the whole set of hairpin conductors joined in this direction is offset by one slot toward this direction, as shown in fig. 19. On the other coil loop in the adjacent slot, since the hairpin conductor with the pitch of 4 in the adjacent slot is opposite to the hairpin conductor f with the pitch of 5(Yb), one of the leg portions must be relatively shifted inward by one slot, so that the set of hairpin conductors joined in this direction is shifted by one slot toward this direction as a whole, as shown in fig. 20. So that the two pole coils at the same pole position on the two coil loops exchange relative positions with each other, and at the next pole position in the circumferential direction, the pole coils on the two coil loops exchange positions again. Thus, in the circumferential direction, half of two coil rings are different from each other by a mechanical angle of +360/Z degrees, and the other half of the two coil rings are different from each other by a mechanical angle of-360/Z degrees, so that the two coil rings can be prevented from generating potential difference to form circulation current.
Example 5:
as shown in fig. 21, the number of pairs of magnetic poles P is 4, the number of slots per pole Q is 2, the number of slots Z of stator slots on a stator core is 48, the number of conductor layers accommodated in each stator slot is 8, and the pole pitch Y is 6.
For convenience of description, one of the phase windings is selected for description, and as shown in fig. 22 and 23, each phase winding includes two coil ring groups, namely a coil ring group a and a coil ring group b, which are mutually shifted by Y stator slot positions in the circumferential direction of the stator core. As shown in fig. 24, the coil ring group a includes 2 coil rings a1 and a2 which are staggered by one stator slot position in the circumferential direction of the stator core; the coil ring group b includes 2 coil rings b1 and b2 which are staggered by one stator slot position in the circumferential direction of the stator core. As shown in fig. 25, each of the coil loop a1, the coil loop a2, the coil loop b1 and the coil loop b2 is formed by connecting 4 magnetic pole coils c uniformly arranged along the circumferential direction of the stator core in series, each magnetic pole coil is composed of a plurality of hairpin conductors, each hairpin conductor comprises a hairpin body bent in a U shape integrally, each hairpin body comprises two leg portions arranged in parallel and a head portion connected to one end of each leg portion, and the other ends of the two leg portions are respectively provided with a support leg.
The pole coil c comprises two rows of radially layered hairpin conductor groups g1 and g2 and an outer-crossing hairpin conductor f, wherein one row of the hairpin conductor group g1 comprises two side-by-side hairpin conductors gf1, two leg parts of the two hairpin conductors gf1 are respectively located in the 2-4 th layer and the 3-5 th layer of the stator slot in which the two leg parts are respectively located, and the other row of the hairpin conductor group g2 comprises a 6-7 th hairpin conductor gf2, two leg parts of which are respectively located in the stator slot in which the two leg parts are respectively located. The two rows of hairpin conductor groups are located at two adjacent magnetic pole positions in the circumferential direction of the stator core, the hairpin conductor group g2 of only one hairpin conductor gf2 and the hairpin conductor of the outer span are located at the same magnetic pole position in the radial direction of the stator core, and two leg parts of the hairpin conductor of the outer span are respectively located at the 1 st layer to the 8 th layer in the stator slot where the two leg parts are located; the legs on the leg parts on the 1 st and 2 nd layers or the 7 th and 8 th layers are deflected and bent towards the opposite direction, and the legs on the leg parts on the other two layers adjacent in sequence are deflected and bent towards each other and connected, as shown in fig. 26 and 27.
In the present embodiment, as shown in fig. 28 and 29, the pitch Ya of the hairpin conductor gf1 and the hairpin conductor gf2 is 5, that is, Ya is Y-1, and the pitch Yb of the hairpin conductor f is 5, that is, Yb is Ya is Y-1.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An inside and outside wrapping type stator assembly comprises a cylindrical stator core, wherein a plurality of stator slots are uniformly distributed on the stator core along the circumferential direction of the stator core, and stator windings are arranged in the stator slots; the motor is characterized in that each phase of winding of the stator winding comprises two groups of coil ring groups which are staggered with Y stator slot positions in the circumferential direction of the stator core, and Y is a pole pitch; each coil ring group comprises Q coil rings which are staggered with one stator slot position in sequence in the circumferential direction of the stator core, and Q is more than or equal to 2; the coil ring is formed by connecting P magnetic pole coils which are uniformly distributed along the circumferential direction of the stator in series, each magnetic pole coil is composed of a plurality of hairpin conductors, and P is the number of magnetic pole pairs; the hairpin conductor comprises a hairpin main body which is bent integrally in a U shape, the hairpin main body comprises two leg parts which are arranged in parallel and heads which are connected to one ends of the two leg parts, and the other ends of the two leg parts are respectively provided with a supporting leg; the magnetic pole coil comprises at least two rows of hairpin conductor groups which are arranged in a layered mode in the radial direction and a hairpin conductor which spans outside, the at least one row of hairpin conductor groups comprises N hairpin conductors with the same number of layers at intervals of the leg parts, the other row of hairpin conductor groups comprises one hairpin conductor or N hairpin conductors with the same number of layers at intervals of the leg parts, and N is 2 or an odd number which is larger than 2; the two leg parts of the hairpin conductor of the outer span are respectively positioned at the innermost layer and the outermost layer in the stator slot where the hairpin conductor is positioned.
2. The inside-and-outside-jacket stator assembly of claim 1, wherein the pitch of all hairpin conductors on the set of hairpin conductors is Ya, the pitch of the hairpin conductors of the outer span is Yb, Ya ═ Y-1; on the same magnetic pole coil, the hair-sending conductors of all the hair-sending conductor sets are located at the same magnetic pole position, and Yb is Y-1 or Yb is Y +1 when the hair-sending conductors which are spanned outwards are wave-shaped conductors with two support legs which are deflected and bent along the opposite direction in the width direction of the hair-sending main body; and on the same magnetic pole coil, when all the hair-sending conductors of all the hair-sending conductor groups are distributed at least two magnetic pole positions, Yb (Ya) and Y-1.
3. The inside-and-outside-wrapped stator assembly according to claim 1, wherein the pitches of all the hairpin conductors on the hairpin conductor set are Ya, Ya being Y-1, the hairpin conductors of the outer span include a hairpin conductor with a pitch of Yb-1 and a hairpin conductor with a pitch of Yb + Q-1, and on the same coil ring, the hairpin conductor with a pitch of Yb-1 and the hairpin conductor with a pitch of Yb + Q-1 are circumferentially arranged on sequentially spaced pole coils; in Q coil rings arranged on circumferentially sequentially adjacent slot positions on each coil ring group, among Q outer-span hair clip conductors sequentially adjacent to each other, in the clockwise or anticlockwise direction, the pitch of the hair clip conductor positioned in the first stator slot is Yb + Q-1, and the pitch of other hair clip conductors is Yb-1; on the same magnetic pole coil, the hair-sending conductors of all the hair-sending conductor sets are located at the same magnetic pole position, and Yb is Y-1 or Yb is Y +1 when the hair-sending conductors which are spanned outwards are wave-shaped conductors with two support legs which are deflected and bent along the opposite direction in the width direction of the hair-sending main body; and on the same magnetic pole coil, when all the hair-sending conductors of all the hair-sending conductor groups are distributed at least two magnetic pole positions, Yb (Ya) and Y-1.
4. The inside-outside pack stator assembly according to claim 1, wherein Q is 2 and P is an even number, the pitch of all the hairpin conductors on the set of hairpin conductors is Ya, and in any coil loop, the hairpin conductors of the outside span each include at least one pair of radially oppositely disposed hairpin conductors having a pitch of Yb +1 and hairpin conductors having a pitch of Yb-1, the paired hairpin conductors having a pitch of Yb +1 and hairpin conductors having a pitch of Yb-1 are uniformly arranged in the circumferential direction, and the other hairpin conductors of the outside span each have a pitch of Yb; in two coil rings arranged on circumferentially adjacent groove positions, the hairpin conductor with the pitch of Yb +1 on one coil ring and the hairpin conductor with the pitch of Yb-1 on the other coil ring are positioned in circumferentially adjacent groove positions; on the same magnetic pole coil, the hair-sending conductors of all the hair-sending conductor sets are located at the same magnetic pole position, and Yb is Y-1 or Yb is Y +1 when the hair-sending conductors which are spanned outwards are wave-shaped conductors with two support legs which are deflected and bent along the opposite direction in the width direction of the hair-sending main body; and on the same magnetic pole coil, when all the hair-sending conductors of all the hair-sending conductor groups are distributed at least two magnetic pole positions, Yb (Ya) and Y-1.
5. The inside-and-outside-wrapped stator assembly according to any one of claims 1 to 4, wherein the pole coil comprises two rows of hairpin conductor groups layered in the radial direction and one outer-spanning hairpin conductor, the two rows of hairpin conductor groups are located at the same magnetic pole position in the radial direction of the stator core, one row of hairpin conductor groups comprises two hairpin conductors arranged side by side, and two leg portions of the two hairpin conductors are respectively located at the 2 nd to 4 th layers and the 3 rd to 5 th layers in the stator slots where the two hairpin conductors are located; the other row of hairpin conductor groups comprise hairpin conductors, and the two leg parts are respectively positioned on the 6 th layer to the 7 th layer in the stator slot where the two leg parts are respectively positioned; two leg parts of the externally-crossed hairpin conductor are respectively positioned on the 1 st layer to the 8 th layer in the stator slot where the hairpin conductor is positioned; the hairpin conductors and the two rows of hairpin conductor groups which are spanned outside are respectively positioned at two circumferentially adjacent magnetic pole positions of the stator core, the support legs positioned on the 1 st and 2 nd layers or the support legs positioned on the 7 th and 8 th layers deflect and bend towards opposite directions, and the support legs on the other two sequentially adjacent layers deflect and bend towards each other and are connected.
6. The inside-and-outside-clad stator assembly according to any one of claims 1-4, wherein the pole coil comprises two rows of radially layered hairpin conductor sets and one outside-spanning hairpin conductor, the two rows of hairpin conductor sets are located at two adjacent pole positions in the circumferential direction of the stator core, one row of hairpin conductor sets comprises two side-by-side hairpin conductors, and two leg portions of the two hairpin conductors are located at 2-4 th and 3-5 th layers in the stator slots respectively; the other row of hairpin conductor group comprises hairpin conductors of which two leg parts are respectively positioned at 6 th to 7 th layers in the stator slots, the two leg parts and the outer-span hairpin conductor are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts of the outer-span hairpin conductor are respectively positioned at 1 st to 8 th layers in the stator slots; the support legs on the 1 st and 2 nd layers or the 7 th and 8 th layers are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
7. The inside-and-outside-wrapped stator assembly according to any one of claims 1 to 4, wherein the pole coil comprises two rows of radially layered hairpin conductor sets and an outside-spanning hairpin conductor, the two rows of hairpin conductor sets are located at the same pole position in the radial direction of the stator core, and the two rows of hairpin conductor sets each comprise two side-by-side hairpin conductors, wherein two leg portions of two hairpin conductors in one row of hairpin conductor sets are located at the 2 nd to 4 th layers and the 3 rd to 5 th layers in the respective stator slots, and two leg portions of two hairpin conductors in the other row of hairpin conductor sets are located at the 6 th to 8 th layers and the 7 th to 9 th layers in the respective stator slots; the hairpin conductors and the two rows of hairpin conductor groups which are in outer span are respectively positioned at two magnetic pole positions which are adjacent in the circumferential direction of the stator core, and the two leg parts are respectively positioned on the 1 st layer to the 10 th layer in the stator slot where the two leg parts are respectively positioned; the support legs on the layers 1-2 or the layers 9-10 are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
8. The inside-and-outside-wrapped stator assembly according to any of claims 1-4, wherein the pole coils comprise two rows of radially layered hairpin conductor sets and one outside-spanning hairpin conductor, the two rows of hairpin conductor sets are located at two adjacent pole positions in the circumferential direction of the stator core, and each two rows of hairpin conductor sets comprise two side-by-side hairpin conductors, wherein two leg portions of two hairpin conductors in one row of hairpin conductor sets are located at the 2-4 th layer and the 3-5 th layer in the respective stator slot, and two leg portions of two hairpin conductors in the other row of hairpin conductor sets are located at the 6-8 th layer and the 7-9 th layer in the respective stator slot; the outward-spanning hairpin conductors and one row of hairpin conductor groups are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts are respectively positioned on the 1 st layer to the 10 th layer in the stator slot where the two leg parts are respectively positioned; the support legs on the layers 1-2 or the layers 9-10 are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
9. The inside-and-outside-wrapped stator assembly according to any of claims 1-4, wherein the pole coil comprises two rows of radially layered hairpin conductor sets and an outside-span hairpin conductor, wherein one row of hairpin conductor sets comprises 2 side-by-side hairpin conductors, the other row of hairpin conductor sets comprises 3 hairpin conductors, two leg portions of the 3 hairpin conductors are respectively located at the 2-5 th layer, the 3-6 th layer and the 4-7 th layer in the stator slot, the leg portions are located at the 2-5 th layer and the 4-7 th layer of hairpin conductors and are located at the same pole position in the radial direction of the stator core and are respectively located at two circumferentially adjacent pole positions of the stator core with the hairpin conductors of the 3-6 th layer, one pole position is the same as the pole position of the 2 side-by-side hairpin conductors, two leg parts on the 2 hairpin conductors are respectively positioned on the 8 th to 10 th layers and the 9 th to 11 th layers in the stator slots where the two leg parts are respectively positioned; the hairpin conductor of the outer span and the hairpin conductor of the leg part positioned on the 3 rd to 6 th layers are positioned at the same magnetic pole position in the radial direction of the stator core, and the two leg parts are respectively positioned on the 1 st to 12 th layers in the stator slot where the two leg parts are respectively positioned; the support legs on the layers 1-2 or the layers 11-12 are deflected and bent towards the opposite direction, and the support legs on the other two layers which are adjacent in sequence are deflected and bent towards each other and connected.
10. An electrical machine comprising an inner and outer wrap stator assembly according to any of claims 1 to 9.
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| CN111969750B (en) | 2022-03-11 |
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Denomination of invention: An internal and external stator component and motor Effective date of registration: 20231016 Granted publication date: 20220311 Pledgee: Chongqing Zongshen Jiyan Mechanical and Electrical Technology Co.,Ltd. Pledgor: CHONGQING ZONGSHEN ELECTRIC POWER TECHNOLOGY Co.,Ltd. Registration number: Y2023980061209 |