CN114123592A - Motor stator winding, stator and motor - Google Patents

Motor stator winding, stator and motor Download PDF

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Publication number
CN114123592A
CN114123592A CN202111386378.6A CN202111386378A CN114123592A CN 114123592 A CN114123592 A CN 114123592A CN 202111386378 A CN202111386378 A CN 202111386378A CN 114123592 A CN114123592 A CN 114123592A
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CN
China
Prior art keywords
conductor
layer
pitch
conductors
innermost
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Granted
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CN202111386378.6A
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Chinese (zh)
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CN114123592B (en
Inventor
柏荣键
张辉
曹新忠
霍从崇
李佳伟
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Tianjin Songzheng Auto Parts Co ltd
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Tianjin Songzheng Auto Parts Co ltd
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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
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

The invention provides a motor stator winding, a stator and a motor, wherein any phase winding comprises at least one first coil group and a plurality of second coil groups, the first coil group comprises a first conductor unit, a second conductor unit and a first conductor group, the first conductor unit and the second conductor unit are arranged in adjacent slots along the circumferential direction of a stator core and are positioned at two outermost adjacent layers and two innermost adjacent layers, the second coil group comprises a third conductor unit, a fourth conductor unit and a second conductor group, the third conductor unit and the fourth conductor unit are arranged in adjacent slots along the circumferential direction of the stator core and are positioned at two outermost adjacent layers and two innermost adjacent layers, the cross-sectional areas of conductors in the first conductor unit and the second conductor unit are smaller than the cross-sectional area of any conductor in the first conductor group, the cross-sectional areas of conductors in the third conductor unit and the fourth conductor unit are smaller than the cross-sectional area of any conductor in the second conductor group, and the alternating current loss of the stator is reduced.

Description

Motor stator winding, stator and motor
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a motor stator winding, a stator and a motor.
Background
In the stator of the electric motor, due to the low voltage application or the high power requirement, the wire wound in the receiving slot usually needs a sufficient cross-sectional area to withstand the larger current, and the prior art uses a plurality of strands of wire with the same cross-sectional area or a single copper wire with a larger cross-sectional area. The single copper wire has the advantage of higher slot occupancy, but due to the relationship between the skin effect and the proximity effect, the ac loss of the copper wire with large cross-sectional area will increase rapidly with the increase of the motor speed. To solve this problem, it is common practice to use a plurality of strands with smaller cross-sectional area of copper wires to reduce the ac loss of the copper wires by reducing the cross-sectional area of a single copper wire. However, this approach will result in a decrease in the copper occupancy, a decrease in the effective cross-sectional area of the copper and a resulting increase in the dc resistance, thereby increasing the overall copper loss.
Disclosure of Invention
In view of the above problems, the present invention provides a stator winding for an electric machine, a stator and an electric machine, so as to solve the above or other problems in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a motor stator winding comprises a multi-phase winding, wherein any phase winding comprises at least one first coil group and a plurality of second coil groups, the first coil groups and the second coil groups are sequentially arranged along the circumferential direction of a stator core and are sequentially connected, and the second coil groups are arranged on two sides of the first coil groups;
the first coil group comprises a first conductor unit, a second conductor unit and a first conductor group, the first conductor unit and the second conductor unit are arranged in adjacent slots along the circumferential direction of the stator core, the first conductor unit and the second conductor unit are arranged on the same radial layer of the stator core, the first conductor unit is arranged on the outermost adjacent layer and the innermost adjacent layer of the stator core, and the first conductor group is arranged on any two radial layers of the stator core between the outermost adjacent layer and the innermost adjacent layer;
the second coil group comprises a third conductor unit, a fourth conductor unit and a second conductor group, the third conductor unit and the fourth conductor unit are arranged in adjacent slots along the circumferential direction of the stator core, the third conductor unit and the fourth conductor unit are arranged on the same radial layer of the stator core, the third conductor unit is arranged on the two outermost adjacent layers and the two innermost adjacent layers of the stator core, and the second conductor group is arranged on any two radial layers of the stator core between the two outermost adjacent layers and the two innermost adjacent layers;
the cross-sectional area of the conductor in the first conductor unit and the cross-sectional area of the conductor in the second conductor unit are both smaller than the cross-sectional area of any conductor in the first conductor group;
the cross-sectional area of the conductor in the third conductor unit and the cross-sectional area of the conductor in the fourth conductor unit are both smaller than the cross-sectional area of any conductor in the second conductor group;
the conductors in the first conductor unit, the second conductor unit, the third conductor unit and the fourth conductor unit are connected in parallel;
the winding of any phase also comprises an outgoing line end, the outgoing line end is arranged at the plug wire end or the welding end of the winding of any phase, and the outgoing line end is constructed by opening any position of the plug wire end or the welding end.
Further, the total number of the first conductor units and the second conductor units is consistent with the number of all the conductors in the first conductor set;
the total number of the third conductor units and the fourth conductor units corresponds to the number of all the conductors in the second conductor set.
Furthermore, the position of the first conductor unit in the slot of the stator core is the same as the position of one conductor in the first conductor group in the slot of the stator core, and the position of the second conductor unit in the slot of the stator core is the same as the position of the other conductor in the first conductor group in the slot of the stator core;
the position of the third conductor unit in the slot of the stator core is the same as the position of one conductor in the second conductor group in the slot of the stator core, and the position of the fourth conductor unit in the slot of the stator core is the same as the position of the other conductor in the second conductor group in the slot of the stator core.
Further, the sum of the cross-sectional areas of all the conductors in the first conductor unit and the sum of the cross-sectional areas of all the conductors in the second conductor unit are not smaller than the cross-sectional area of any one conductor in the first conductor group;
the sum of the cross-sectional areas of all the conductors in the third conductor unit and the sum of the cross-sectional areas of all the conductors in the fourth conductor unit are not smaller than the cross-sectional area of any one of the conductors in the second conductor set.
Further, the first conductor unit includes two first long-pitch conductors, wherein one of the first long-pitch conductors is located at a radially outermost layer and an innermost layer of the stator core, and the other of the first long-pitch conductors is located at a radially (outermost-1) layer and a (innermost +1) layer of the positioning core, or one of the first long-pitch conductors is located at a radially outermost layer and a (innermost +1) layer of the stator core, and the other of the first long-pitch conductors is located at a radially (outermost-1) layer and an innermost layer of the positioning core;
the second conductor unit includes two first short-pitch conductors, wherein one first short-pitch conductor is located at the radially outermost and innermost layers of the stator core, and the other first short-pitch conductor is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one first short-pitch conductor is located at the radially outermost and (innermost +1) layers of the stator core, and the other first short-pitch conductor is located at the radially (outermost-1) and innermost layers of the positioning core;
the third conductor unit and the fourth conductor unit respectively comprise two first full-pitch conductors, wherein one first full-pitch conductor is positioned on the radial outermost layer and the radial innermost layer of the stator core, and the other first full-pitch conductor is positioned on the radial (outermost layer-1) layer and the radial (innermost layer +1) layer of the positioning core;
or, one first full-pitch conductor is located at the radially outermost and (innermost +1) layers of the stator core, and the other first full-pitch conductor is located at the radially (outermost-1) and innermost layers of the positioning core.
Further, the pitch of the first long-pitch conductor is 7, the pitch of the first short-pitch conductor is 5, and the pitch of the first full-pitch conductor is 6.
Further, the first conductor unit includes two second long-pitch conductors, wherein one of the second long-pitch conductors is located at the radially outermost layer and the innermost layer of the stator core, and the other of the second long-pitch conductors is located at the radially (outermost-1) layer and the (innermost +1) layer of the positioning core, or one of the second long-pitch conductors is located at the radially outermost layer and the (innermost +1) layer of the stator core, and the other of the second long-pitch conductors is located at the radially (outermost-1) layer and the innermost layer of the positioning core;
the second conductor unit comprises two first full-pitch conductors, wherein one first full-pitch conductor is positioned on the radial outermost layer and the innermost layer of the stator core, the other first full-pitch conductor is positioned on the radial (outermost layer-1) layer and the (innermost layer +1) layer of the positioning core, or one first full-pitch conductor is positioned on the radial outermost layer and the (innermost layer +1) layer of the stator core, and the other first full-pitch conductor is positioned on the radial (outermost layer-1) layer and the innermost layer of the positioning core;
the third conductor unit and the fourth conductor unit respectively comprise two first long-pitch conductors, wherein one first long-pitch conductor is positioned on the radial outermost layer and the radial innermost layer of the stator core, and the other first long-pitch conductor is positioned on the radial (outermost layer-1) layer and the radial (innermost layer +1) layer of the positioning core;
or, one first long-pitch conductor is located at the radially outermost and (innermost +1) layers of the stator core, and the other first long-pitch conductor is located at the radially (outermost-1) and innermost layers of the positioning core.
Further, the pitch of the second long-pitch conductor is 8.
Further, the first conductor unit includes two first full-pitch conductors, wherein one first full-pitch conductor is located at the radially outermost and innermost layers of the stator core, and the other first full-pitch conductor is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one first full-pitch conductor is located at the radially outermost and (innermost +1) layers of the stator core, and the other first full-pitch conductor is located at the radially (outermost-1) and innermost layers of the positioning core;
the second conductor unit includes two second short-pitch conductors, wherein one of the second short-pitch conductors is located at a radially outermost layer and an innermost layer of the stator core, and the other of the second short-pitch conductors is located at a radially (outermost-1) layer and an (innermost +1) layer of the positioning core, or one of the second short-pitch conductors is located at a radially outermost layer and an (innermost +1) layer of the stator core, and the other of the second short-pitch conductors is located at a radially (outermost-1) layer and an innermost layer of the positioning core;
the third conductor unit and the fourth conductor unit respectively comprise two first short-pitch conductors, wherein one first short-pitch conductor is positioned on the radial outermost layer and the radial innermost layer of the stator core, and the other first short-pitch conductor is positioned on the radial (outermost layer-1) layer and the radial (innermost layer +1) layer of the positioning core;
or, one first short-pitch conductor is located at the radially outermost and (innermost +1) layers of the stator core, and the other first short-pitch conductor is located at the radially (outermost-1) and innermost layers of the positioning core.
Further, the pitch of the second short-pitch conductor is 4.
Furthermore, the first conductor group and the second conductor group are arranged on two layers which are adjacent to each other in the radial direction of the stator core.
Further, the first conductor group comprises a first long-pitch conductor and a first short-pitch conductor, and the first long-pitch conductor is arranged around the outside of the first short-pitch conductor;
the second conductor set comprises two first full-pitch conductors, and the two first full-pitch conductors are arranged in adjacent slots of the same radial layer of the stator core.
Further, the first conductor group comprises a second long-pitch conductor and a first full-pitch conductor, and the second long-pitch conductor is arranged around the outside of the first full-pitch conductor;
or the second conductor group comprises two first long-pitch conductors, and the two first long-pitch conductors are arranged in adjacent slots of the same radial layer of the stator core.
Further, the first conductor group comprises a first full-pitch conductor and a second short-pitch conductor, and the first full-pitch conductor is arranged around the outside of the second short-pitch conductor;
the second conductor set comprises two first short-pitch conductors, and the two first short-pitch conductors are arranged in adjacent slots of the same radial layer of the stator core.
Further, the number of radial layers of the stator core is an even number of layers which is greater than or equal to 6.
Furthermore, any phase winding comprises at least two parallel branches, in each parallel branch, in two adjacent coil groups, the conductor in one conductor unit in one coil group is connected in parallel and is connected in series with one conductor in the conductor group in the other coil group.
Further, in any parallel branch, when the leading-out wire end is arranged at the plug wire end, the conductors respectively connected with the leading-out wire end and the leading-out wire end are all S-shaped conductors, and when the leading-out wire end is arranged at the welding end, the conductors respectively connected with the leading-out wire end and the leading-out wire end are all U-shaped conductors.
A stator comprising a motor stator winding as described above.
An electric machine comprising a stator as described above.
Due to the adoption of the technical scheme, the stator winding adopts conductors with different specifications, the conductors with smaller cross-sectional areas are positioned at the outermost side and the innermost side of the stator core, the conductors with larger cross-sectional areas are positioned between the outermost side and the innermost layer of the stator core, and because the alternating current loss of the winding layer arranged at the innermost side is larger than the alternating current loss of the winding layer arranged at the outermost side under the influence of the proximity effect, the preparation of the stator winding is carried out by adopting the conductors with different specifications, the alternating current loss of the stator can be effectively reduced, and simultaneously, the slot occupation rate is reduced and the direct current loss is increased because a plurality of conductors with smaller cross-sectional areas are used, so that the stator achieves the purposes of reducing the influence of the proximity effect and reducing the overall loss; the conductors in the stator winding are the same type of conductors except the conductor connected with the outgoing line end, the conductor type is single, the structure of the stator winding is simple, the preparation process is simple, the outgoing line end can be led out at any position of a plug wire end or any position of a welding end of the stator winding, and loop current is cancelled.
Drawings
FIG. 1 is a schematic structural diagram of a stator according to an embodiment of the present invention;
fig. 2 is a schematic structural view of any one phase winding of the stator winding of an embodiment of the present invention;
FIG. 3 is a structural schematic diagram of a cross-section of a stator of an embodiment of the present invention;
fig. 4 is a schematic structural diagram (no outgoing line end) of the expanded state of the plug end of any phase winding according to the first embodiment of the present invention;
fig. 5 is a schematic structural view (no lead-out terminal) of the expanded state of the welding terminal of any phase winding according to the first embodiment of the present invention;
fig. 6 is a schematic structural diagram of an expanded state of the plug terminal of any phase winding according to the first embodiment of the present invention (the lead terminal is provided at the plug terminal of any phase winding);
fig. 7 is a schematic structural diagram of an unfolded state of one parallel branch of any phase winding according to the first embodiment of the present invention (the outgoing line end is provided at the plug end of any phase winding);
fig. 8 is a schematic structural view showing an expanded state of another parallel branch of any one phase winding according to the first embodiment of the present invention (the outgoing line end is provided at the plug end of any one phase winding);
fig. 9 is a schematic structural view of the expanded state of the plug terminal of any phase winding according to the second embodiment of the present invention (the lead terminal is provided at the plug terminal of any phase winding);
fig. 10 is a schematic structural view showing an expanded state of one parallel branch of any one phase winding according to the second embodiment of the present invention (the outgoing line end is provided at the plug end of any one phase winding);
fig. 11 is a schematic structural view showing an expanded state of another parallel branch of any one phase winding according to the second embodiment of the present invention (a lead-out terminal is provided at a plug terminal of any one phase winding);
fig. 12 is a schematic structural view of a developed state of a plug terminal of any phase winding according to a third embodiment of the present invention (a lead terminal is provided at the plug terminal of any phase winding);
fig. 13 is a schematic structural view of the expanded state of the plug terminal of any phase winding according to the fourth embodiment of the present invention (the lead terminal is provided at the plug terminal of any phase winding);
fig. 14 is a schematic structural view of the expanded state of the plug terminal of any phase winding according to the fifth embodiment of the present invention (no outlet terminal);
fig. 15 is a schematic structural view (no lead terminal) of a developed state of the weld terminal of any one phase winding according to the fifth embodiment of the present invention;
fig. 16 is a schematic structural view of the expanded state of the plug terminal of any phase winding according to the fifth embodiment of the present invention (the lead terminal is provided at the plug terminal of any phase winding);
fig. 17 is a schematic structural view showing an expanded state of one parallel branch of any one phase winding according to the fifth embodiment of the present invention (the outgoing line end is provided at the plug end of any one phase winding);
fig. 18 is a schematic structural view showing an expanded state of another parallel branch of any one phase winding according to the fifth embodiment of the present invention (the outgoing line end is provided at the plug end of any one phase winding);
fig. 19 is a schematic structural view of the expanded state of the plug terminal of any phase winding according to the sixth embodiment of the present invention (the lead terminal is provided at the plug terminal of any phase winding);
fig. 20 is a schematic structural view of the expanded state of the plug terminal of any phase winding according to the seventh embodiment of the present invention (the lead terminal is provided at the plug terminal of any phase winding);
fig. 21 is a schematic structural view showing a developed state of the plug terminal of any one phase winding according to the eighth embodiment of the present invention (the lead terminal is provided at the plug terminal of any one phase winding).
In the figure:
10. stator winding 20, stator core 30, and lead-out wire end
40. Plug terminal 50, soldering terminal 60, first coil assembly
70. Second coil assembly 100, first conductor unit 110, second conductor unit
120. First conductor set 130, third conductor unit 140, fourth conductor unit
150. Second conductor set 160, first full-pitch conductor 170, first short-pitch conductor
180. First long-pitch conductor 190 and second short-pitch conductor
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Fig. 1 to 21 are schematic structural diagrams illustrating some embodiments of the present invention, and some embodiments of the present invention relate to a stator winding of an electric machine, a stator, and an electric machine, where the stator winding of the electric machine is composed of conductors with different cross-sectional areas, the conductors with smaller cross-sectional areas are located at two outermost adjacent layers and two innermost adjacent layers in the radial direction of a stator core, the conductors with larger cross-sectional areas are located between two outermost adjacent layers and two innermost adjacent layers in the radial direction of the stator core, and therefore, the ac loss of the stator can be effectively reduced, the influence of the proximity effect and the overall loss can be reduced without changing the slot occupation ratio and the dc loss, and a leading-out terminal is located at any position of a wire insertion terminal or any position of a welding terminal of any phase winding, and the loop current is cancelled.
1-5, 14 and 15, a stator winding of an electric machine includes multiple phase windings, where any phase winding includes at least one first coil group 60 and a plurality of second coil groups 70, the plurality of first coil groups 60 and the plurality of second coil groups 70 are sequentially arranged and sequentially connected along a circumferential direction of a stator core 20, and the second coil groups 70 are arranged on two sides of the plurality of first coil groups 60, that is, along the circumferential direction of the stator core 20, one part of the plurality of second coil groups 70, and another part of the at least one first coil group 60 and the plurality of second coil groups 70 are sequentially arranged and sequentially connected, so as to construct any phase winding of an annular structure; each phase winding in the stator winding 10 has the same structure, but the position of each phase winding in the slot of the stator core 20 is different, and the number of phases of the winding in the stator winding 10 is selected according to actual requirements, and no specific requirement is made here;
the first coil group 60 includes a first conductor unit 100, a second conductor unit 110, and a first conductor group 120, the first conductor unit 100 and the second conductor unit 110 are disposed in adjacent slots along the circumferential direction of the stator core 20, and the first conductor unit 100 and the second conductor unit 110 are disposed in the same layer in the radial direction of the stator core 20, the first conductor unit 100 is disposed in the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, the first conductor group 120 is disposed in any two layers between the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, that is, along the circumferential direction of the stator core 20, the first conductor unit 100 and the second conductor unit 110 are disposed in adjacent slots of the same layer in the radial direction of the stator core 20, the first conductor unit 100 is disposed in the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, the second conductor units 110 are also located at two outermost adjacent layers and two innermost adjacent layers in the radial direction of the stator core 20, the slot of the stator core 20 where the first conductor unit 100 is located is consistent with the slot of the stator core 20 where one conductor in the first conductor group 120 is located, the slot of the stator core 20 where the second conductor unit 110 is located is consistent with the slot of the stator core 20 where the other conductor in the first conductor group 120 is located, and the first conductor group 120 and the first conductor unit 100 are sequentially arranged from the innermost layer to the outermost layer along the radial direction of the stator core 20;
the second coil group 70 includes a third conductor unit 130, a fourth conductor unit 140, and a second conductor group 150, the third conductor unit 130 and the fourth conductor unit 140 are disposed in adjacent slots along the circumferential direction of the stator core 20, and the third conductor unit 130 and the fourth conductor unit 140 are disposed in the same layer in the radial direction of the stator core 20, the third conductor unit 130 is disposed in the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, the second conductor group 150 is disposed in any two layers between the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, that is, in the circumferential direction of the stator core 20, the third conductor unit 130 and the fourth conductor unit 140 are disposed in adjacent slots of the same layer in the radial direction of the stator core 20, the third conductor unit 130 is disposed in the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, the fourth conductor unit 140 is also disposed in the outermost adjacent two layers and the innermost adjacent two layers in the radial direction of the stator core 20, the position of the slot of the stator core 20 where the third conductor unit 130 is located is the same as the position of the slot of the stator core 20 where one conductor in the second conductor group 150 is located, the position of the slot of the stator core 20 where the fourth conductor unit 140 is located is the same as the position of the slot of the stator core 20 where the other conductor in the second conductor group 150 is located, and the second conductor group 150 and the third conductor unit 130 are sequentially arranged from the innermost layer to the outermost layer along the radial direction of the stator core 20;
preferably, in the first coil group 60, the total number of the first conductor unit 100 and the second conductor unit 110 is identical to the total number of the conductors in the first conductor group 120, and the positions of the slots of the stator core 20 where the first conductor unit 100 and the second conductor unit 110 are located are identical to the positions of the slots of the stator core 20 where the conductors in the first conductor group 120 are located; in the second coil group 70, the total number of the third conductor unit 130 and the fourth conductor unit 140 is consistent with the total number of the conductors in the second conductor group 150, and the positions of the slots of the stator core 20 where the third conductor unit 130 and the fourth conductor unit 140 are located are consistent with the positions of the slots of the stator core 20 where the conductors in the second conductor group 150 are located;
the cross-sectional area of the conductor in the first conductor unit 100 and the cross-sectional area of the conductor in the second conductor unit 110 are both smaller than the cross-sectional area of the conductor in the first conductor group 120, that is, the cross-sectional area of each conductor in the first conductor unit 100 is smaller than the cross-sectional area of any conductor in the first conductor group 120, the cross-sectional area of each conductor in the second conductor unit 110 is smaller than the cross-sectional area of any conductor in the first conductor group 120, and the cross-sectional areas of the conductor in the first conductor unit 100 and the cross-sectional area of the conductor in the second conductor unit 110 are selected according to actual needs, and are not specifically required herein;
the cross-sectional area of the conductor in the third conductor unit 130 and the cross-sectional area of the conductor in the fourth conductor unit 140 are both smaller than the cross-sectional area of the conductor in the second conductor group 150, that is, the cross-sectional area of each conductor in the third conductor unit 130 is smaller than the cross-sectional area of any conductor in the second conductor group 150, the cross-sectional area of each conductor in the fourth conductor unit 140 is smaller than the cross-sectional area of any conductor in the second conductor group 150, and the cross-sectional areas of the conductor in the third conductor unit 130 and the cross-sectional area of the conductor in the fourth conductor unit 140 are selected according to actual needs, and are not specifically required herein;
the conductors with smaller cross-sectional areas in the conductor specifications are arranged on the innermost side and the outermost side of the stator core 20, and the conductors with larger cross-sectional areas are arranged between the innermost side and the outermost side of the stator core 20, so that the alternating current loss of the winding layer arranged on the innermost side is greater than the alternating current loss of the winding layer arranged on the outermost side under the influence of the proximity effect, and the arrangement of the conductors with unequal cross-sectional areas can effectively reduce the alternating current loss of the stator, and simultaneously, the groove occupying rate is reduced and the direct current loss is increased because a plurality of conductors with smaller cross-sectional areas are used, so that the stator achieves the purposes of reducing the influence of the proximity effect and reducing the overall loss.
The conductors in the first conductor unit 100, the second conductor unit 110, the third conductor unit 130 and the fourth conductor unit 140 are all connected in parallel, that is, the plurality of conductors in the first conductor unit 100 are connected in parallel to form a conductor form, the plurality of conductors in the second conductor unit 110 are connected in parallel to form a conductor form, the plurality of conductors in the third conductor unit 130 are connected in parallel to form a conductor form, and the plurality of conductors in the fourth conductor unit 140 are connected in parallel to form a conductor form;
the winding of any phase further includes an outgoing line end 30, the outgoing line end 30 is arranged at the plug end 40 or the welding end 50 of the winding of any phase, and the outgoing line end 30 is constructed by opening at any position of the plug end 40 or the welding end 50, the outgoing line end 30 may be located at the plug end 40 of the winding of any phase or at the welding end 50 of the winding of any phase, and is selected according to actual requirements, which does not make specific requirements.
The number of the outlet terminals 30 is selectively set according to the number of the parallel branches in any phase winding, and is not particularly required here.
When the leading-out wire end 30 is provided at the plug end 40 of any phase winding, the leading-out wire end 30 may be configured to be opened from at least one conductor in the first conductor unit 100, at least one conductor in the second conductor unit 110, at least one conductor in the first conductor group 120, at least one conductor in the third conductor unit 130, at least one conductor in the fourth conductor unit 140, or at least one conductor in the second conductor group 150, that is, the leading-out wire end 30 may be opened from the conductor with the largest pitch in the first conductor unit 100, the plug end of the conductor with the largest pitch may be opened, the leading-out wire end and the leading-out wire end may be formed, the plug end of the conductor with the smallest pitch in the first conductor unit 100 may be opened, the lead-out wire end and the leading-out wire end may be formed, or the plug end of the conductor may be opened from the other conductor in the first conductor unit 100, lead terminals and lead-out terminals are formed, and the selection of the conductors and the selection of the number of the conductors in the first conductor unit 100 are selected according to actual requirements, and no specific requirements are made here; or, the conductor is opened from the conductor with the largest pitch in the second conductor unit 110, the plug wire end of the conductor with the largest pitch is opened to form the lead end and the outlet end, or the conductor is opened from the conductor with the smallest pitch in the second conductor unit 110, the plug wire end of the conductor with the smallest pitch is opened to form the lead end and the outlet end, or the other conductors in the second conductor unit 110 are opened to form the plug wire end of the conductor and the outlet end, and the selection of the conductors and the selection of the number of the conductors in the second conductor unit 110 are selected according to the actual requirements, and are not specifically required; or, the conductor with the largest pitch in the first conductor group 120 is opened, the plug wire end of the conductor with the largest pitch is opened to form the lead end and the outlet end, or the conductor with the smallest pitch in the first conductor group 120 is opened, the plug wire end of the conductor with the smallest pitch is opened to form the lead end and the outlet end, or the other conductors in the first conductor group 120 are opened, the plug wire end of the conductor is opened to form the lead end and the outlet end, and the selection of the conductors and the selection of the number of the conductors in the first conductor group 120 are selected according to the actual requirements, and are not specifically required; or, the conductor with the largest pitch in the third conductor unit 130 is opened, the plug wire end of the conductor with the largest pitch is opened, and a lead terminal and an outlet terminal are formed, or the conductor with the smallest pitch in the third conductor unit 130 is opened, and the plug wire end of the conductor with the smallest pitch is opened, and a lead terminal and an outlet terminal are formed, or the conductor is opened from other conductors in the third conductor unit 130, and the plug wire end of the conductor is opened, and a lead terminal and an outlet terminal are formed, and the selection of the conductor and the selection of the number of the conductors in the third conductor unit 130 are selected according to actual requirements, and are not specifically required; or, the conductor with the largest pitch in the fourth conductor unit 140 is opened, the plug wire end of the conductor with the largest pitch is opened, and a lead end and a lead-out end are formed, or the conductor with the smallest pitch in the fourth conductor unit 140 is opened, and the plug wire end of the conductor with the smallest pitch is opened, and a lead end and a lead-out end are formed, or the conductor is opened from other conductors in the fourth conductor unit 140, and the plug wire end of the conductor is opened, and a lead end and a lead-out end are formed, and the selection of the conductor and the selection of the number of the conductors in the fourth conductor unit 140 are selected according to actual requirements, and are not specifically required; or, the conductor is opened from the conductor with the largest pitch in the second conductor group 150, the plug end of the conductor with the largest pitch is opened to form the lead end and the outlet end, or the conductor is opened from the conductor with the smallest pitch in the second conductor group 150, the plug end of the conductor with the smallest pitch is opened to form the lead end and the outlet end, or the plug end of the conductor is opened from the other conductors in the second conductor group 150 to form the lead end and the outlet end, and the selection of the conductors and the selection of the number of the conductors in the second conductor group 150 are selected according to actual requirements, and are not specifically required here.
Further, the lead-out wire terminal 30 may be opened from the plug terminal 40 portion of one conductor in the first conductor unit 100 and from the plug terminal 40 portion of one conductor in the second conductor unit 110, or the lead-out wire terminal 30 may be opened from the plug terminal 40 portion of one conductor in the third conductor unit 130 and from the plug terminal 40 portion of one conductor in the fourth conductor unit 140, or the lead-out wire terminal 30 may be opened from the plug terminal 40 portion of one conductor in the first conductor unit 100 and from the plug terminal 40 portion of one conductor in the first conductor group 120 or the lead-out wire terminal 30 may be opened from the plug terminal 40 portion of one conductor in the second conductor unit 110 and from the plug terminal 40 portion of one conductor in the first conductor group 120, or the lead-out wire terminal 30 may be opened from the plug terminal 40 portion of one conductor in the third conductor unit 130, and, the leading-out wire end 30 is opened from the plug wire end 40 of one conductor in the second conductor group 150, or the leading-out wire end 30 may also be opened from the plug wire end 40 of one conductor in the fourth conductor unit 140, and the plug wire end 40 of one conductor in the second conductor group 150, as long as the current directions of the conductors in the motor stator winding 10 are consistent, the arrangement of the position of the leading-out wire end 30 at the plug wire end 40 is selected according to actual requirements, and is not specifically required here.
When the leading-out wire end 30 is arranged at the welding end 50 of any phase of winding, two welding end parts welded at any phase can be opened to form a leading-out wire end and a leading-out wire end, the arrangement of the leading-out wire end 30 is selected, and the arrangement is selected according to actual requirements, and no specific requirement is made here.
Preferably, the sum of the cross-sectional areas of all the conductors in the first conductor unit 100 is not smaller than the cross-sectional area of any one of the conductors in the first conductor set 120; the sum of the cross-sectional areas of all the conductors in the second conductor unit 110 is not smaller than the cross-sectional area of any one of the conductors in the first conductor set 120; the sum of the cross-sectional areas of all the conductors in the third conductor unit 130 is not smaller than the cross-sectional area of any of the conductors in the second conductor set 150; the sum of the cross-sectional areas of all the conductors in the fourth conductor unit 140 is not smaller than the cross-sectional area of any of the conductors in the second conductor set 150. In the stator core 20, the conductors located in different radial layers in the same slot of the stator core 20 have different cross-sectional areas, and the cross-sectional area of the conductor located in the outermost adjacent two layers and the cross-sectional area of the conductor located in the innermost adjacent two layers are both smaller than the cross-sectional area of the conductor located between the outermost adjacent two layers and the innermost adjacent two layers. The gauge of the conductor in the first conductor unit 100 is different from the gauge of the conductor in the first conductor set 120, the gauge of the conductor in the second conductor unit 110 is different from the gauge of the conductor in the first conductor set 120, the gauge of the conductor in the third conductor unit 130 is different from the gauge of the conductor in the second conductor set 150, and the gauge of the conductor in the fourth conductor unit 140 is different from the gauge of the conductor in the second conductor set 150.
The number of radial layers of the stator core 20 is an even number of layers greater than or equal to 6, and the number of radial layers of the stator core 20 may be 6, 8, or other even number of layers, which is selected according to actual requirements, and is not specifically required here.
And any phase winding comprises at least two parallel branches, and in each branch, in two adjacent coil groups, the conductors in the conductor unit in one coil group are connected in parallel and connected in series with one conductor in one conductor group in the other coil group after being connected in parallel. For example, when the number of the first coil groups 60 is one, both sides of the first coil groups 60 are a plurality of second coil groups 70, in each parallel branch of any phase winding, the conductors in the first conductor unit 100 in the first coil group 60 are connected in parallel, and after connection, is connected in series with one conductor in the second conductor set 150 in the adjacent one of the second coil sets 70, the conductor is simultaneously connected in series with the parallel-wound conductors in the third conductor unit 130 in one second coil adjacent to the second coil group 70, the conductor in the third conductor unit 130 connected in parallel is simultaneously connected in series with one conductor in the second conductor group 150 in another second coil adjacent to the second coil group 70, and so on, the plurality of second coil groups 70 in each parallel branch in any phase winding are connected in series with the first coil group 60 in turn; each parallel branch in any phase winding is connected in the same way, and the plug end 40 of the conductor at any position is opened to form the leading-out wire end 30, or the two welding ends 50 welded at any position are opened to form the leading-out wire end 30, so that symmetrical circulating current is formed.
In any parallel branch, when the leading-out wire end 30 is disposed at the plug wire end 40, the conductors connected to the leading-out wire end and the leading-out wire end are S-shaped conductors, and the other conductors are U-shaped conductors, and when the leading-out wire end 30 is disposed at the soldering end 50, the conductors connected to the leading-out wire end and the leading-out wire end are U-shaped conductors, and the other conductors are also U-shaped conductors. In any one of the phase windings of the stator winding 10, the conductors in each phase winding are U-shaped conductors of the same type (except for the conductors connected to the lead-out wire ends 30), the welded ends of the U-shaped conductors extend in the circumferential direction of the stator core 20, and the extending directions of the welded ends extend in opposite directions. The plurality of conductors in the first coil group 60 and the plurality of conductors in the second coil group 70 are all hairpin coils with the same structure, the hairpin coils are U-shaped conductors, the U-shaped conductors have two welding end parts, the U-shaped conductors are used for being welded and connected with the welding end parts of the hairpin coils of the adjacent layers, the hairpin coils have two groove inner parts and one wire inserting end part, one ends of the two groove inner parts are respectively connected with the two welding end parts, the other ends of the two groove inner parts are respectively connected with the wire inserting end parts to form a U-shaped conductor structure, the U-shaped conductors with the same structure and different pitches are selected according to the preparation requirement of the stator winding 10, and the structure of the first conductor unit 100, the second conductor unit 110, the third conductor unit 130, the fourth conductor unit 140, the first conductor group 120 and the second conductor group 150 is formed, the plurality of the third conductor unit 130, the plurality of the fourth conductor unit 140, the plurality of the second conductor group 150 and at least one first conductor unit 100, The at least one second conductor unit 110 and the at least one first conductor group 120 are configured into a structure of any phase winding according to a certain arrangement rule, and the multi-phase winding is configured into a structure of the stator winding 10, so that the stator winding 10 has a simple structure, a simple preparation process and high working efficiency. Both welding ends of the conductor extend along the circumferential direction of the stator core 20, and the extending directions extend in opposite directions, and are opposite and away from each other.
In each parallel branch in each phase winding, when the outgoing line end 30 is located at the plug end 40 of any phase winding, the conductor connected with the outgoing line end 30 is an S-shaped conductor, that is, the conductors connected with the outgoing line end and the lead end are both S-shaped conductors, so as to be conveniently connected with the outgoing line end 30, and the other conductors in any phase winding are all U-shaped conductors; wherein the S-shaped conductor includes a slot interior and welding end portions located at both axial ends of the stator core 20, the two welding end portions being connected to both ends of the slot interior, respectively. When the leading-out wire end 30 is located at the welding end 50 of any phase winding, the conductor connected with the leading-out wire end 30 is a U-shaped conductor, the conductor in any phase winding is a U-shaped conductor, and the two welding end parts welded at any phase are opened and respectively connected with the leading wire end and the leading-out wire end, so that the leading-out wire end 30 can be formed.
The first conductor unit 100 described above includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the radially outermost and innermost layers of the stator core 20, and the other first long-pitch conductor 180 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one first long-pitch conductor 180 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first long-pitch conductor 180 is located at the radially (outermost-1) and innermost layers of the positioning core.
The second conductor unit 110 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the radially outermost and innermost layers of the stator core 20, and the other first short-pitch conductor 170 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one first short-pitch conductor 170 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first short-pitch conductor 170 is located at the radially (outermost-1) and innermost layers of the positioning core.
The third conductor unit 130 and the fourth conductor unit 140 each include two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the radially outermost and innermost layers of the stator core 20, and the other first full-pitch conductor 160 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core;
alternatively, the third conductor unit 130 and the fourth conductor unit 140 each include two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first full-pitch conductor 160 is located at the radially outermost and innermost layers of the positioning core.
Alternatively, the first conductor unit 100 includes two second long-pitch conductors, one of which is located at the radially outermost and innermost layers of the stator core 20 and the other of which is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one of which is located at the radially outermost and (innermost +1) layers of the stator core 20 and the other of which is located at the radially (outermost-1) and innermost layers of the positioning core.
The second conductor unit 110 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the radially outermost and innermost layers of the stator core 20, and the other first full-pitch conductor 160 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one first full-pitch conductor 160 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first full-pitch conductor 160 is located at the radially (outermost-1) and innermost layers of the positioning core.
The third conductor unit 130 and the fourth conductor unit 140 each include two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the radially outermost and innermost layers of the stator core 20, and the other first long-pitch conductor 180 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core; or, one first long-pitch conductor 180 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first long-pitch conductor 180 is located at the radially (outermost-1) and innermost layers of the positioning core.
Alternatively, the first conductor unit 100 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the radially outermost and innermost layers of the stator core 20, and the other first full-pitch conductor 160 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one first full-pitch conductor 160 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first full-pitch conductor 160 is located at the radially (outermost-1) and innermost layers of the positioning core;
the second conductor unit 110 includes two second short-pitch conductors 190, wherein one second short-pitch conductor 190 is located at the radially outermost and innermost layers of the stator core 20, and the other second short-pitch conductor 190 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core, or one second short-pitch conductor 190 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other second short-pitch conductor 190 is located at the radially (outermost-1) and innermost layers of the positioning core.
The third conductor unit 130 and the fourth conductor unit 140 each include two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the radially outermost and innermost layers of the stator core 20, and the other first short-pitch conductor 170 is located at the radially (outermost-1) and (innermost +1) layers of the positioning core; or, each of the third conductor unit 130 and the fourth conductor unit 140 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the radially outermost and (innermost +1) layers of the stator core 20, and the other first short-pitch conductor 170 is located at the radially outermost and innermost layers of the positioning core.
Where the pitch of the first long-pitch conductor 180 is 7, the pitch of the first short-pitch conductor 170 is 5, the pitch of the first full-pitch conductor 160 is 6, the pitch of the second long-pitch conductor is 8, and the pitch of the second short-pitch conductor 190 is 4.
Preferably, the first conductor set 120 and the second conductor set 150 are disposed on two radially adjacent layers of the stator core 20.
The first conductor group 120 includes a first long-pitch conductor 180 and a first short-pitch conductor 170, and the first long-pitch conductor 180 is arranged around the outside of the first short-pitch conductor 170; alternatively, the first conductor group 120 includes a second long-pitch conductor and the first full-pitch conductor 160, the second long-pitch conductor being surrounded outside the first full-pitch conductor 160; alternatively, the first conductor group 120 includes a first full-pitch conductor 160 and a second short-pitch conductor 190, and the first full-pitch conductor 160 is surrounded outside the second short-pitch conductor 190.
The second conductor set 150 includes two first full-pitch conductors 160, and the two first full-pitch conductors 160 are disposed in adjacent slots of the same radial layer of the stator core 20; alternatively, the second conductor set 150 includes two first long-pitch conductors 180, and the two first long-pitch conductors 180 are disposed in adjacent slots of the same layer in the radial direction of the stator core 20; alternatively, the second conductor set 150 includes two first short-pitch conductors 170, and the two first short-pitch conductors 170 are provided in adjacent slots of the same layer in the radial direction of the stator core 20.
In a further preferred embodiment, each first coil assembly 60 is located in one pole, each second coil assembly 70 is located in one pole, and the different coil assemblies are located in different poles.
A stator comprising a stator winding 10 for an electrical machine as described above.
An electric machine comprises the stator.
The following is a detailed description of some specific embodiments.
In some embodiments described below, the stator winding 10 is a three-phase stator winding, the number of slots provided in the stator core 20 is equal to 48, the 48 slots are spaced apart at a predetermined slot pitch in the circumferential direction of the stator core 20, both side walls of the slots are teeth, that is, two adjacent slots define one tooth, the stator winding 10 is mounted on the stator core 20, and the number of radial layers of the stator core 20 is six.
Example one
As shown in fig. 1 to 6, each phase of the stator winding 10 includes a first coil group 60 and seven second coil groups 70, the seven second coil groups 70 are located at two sides of the first coil group 60, and the first coil group 60 and the seven second coil groups 70 are sequentially arranged along the circumferential direction of the stator core 20, and are sequentially connected in series to form any phase of the winding in an annular structure;
the first coil group 60 includes a first conductor unit 100, a second conductor unit 110 and a first conductor group 120, wherein the first conductor unit 100 and the second conductor unit 110 are located in two adjacent slots of the same radial layer of the stator core 20, and the first conductor group 120 is located in two radially adjacent layers of the stator core 20; specifically, the first conductor unit 100 and the second conductor unit 110 are located at the first layer, the second layer, the fifth layer and the sixth layer in the radial direction of the stator core 20, and the first conductor group 120 is located at the third layer and the fourth layer in the radial direction of the stator core 20;
the first conductor unit 100 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the sixth layer and the first layer, and the other first long-pitch conductor 180 is located at the fifth layer and the second layer;
the second conductor unit 110 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the sixth layer and the first layer, and the other first short-pitch conductor 170 is located at the fifth layer and the second layer;
the first conductor set 120 includes one first long-pitch conductor 180 and one first short-pitch conductor 170, wherein the first long-pitch conductor 180 is located at the third layer and the fourth layer, and the first short-pitch conductor 170 is located at the third layer and the fourth layer;
the second coil group 70 includes a third conductor unit 130, a fourth conductor unit 140 and a second conductor group 150, wherein the third conductor unit 130 and the fourth conductor unit 140 are located in two adjacent slots of the same radial layer of the stator core 20, and the second conductor group 150 is located in two radially adjacent layers of the stator core 20; specifically, the third conductor unit 130 and the fourth conductor unit 140 are located at the first layer, the second layer, the fifth layer and the sixth layer in the radial direction of the stator core 20, and the second conductor group 150 is located at the third layer and the fourth layer in the radial direction of the stator core 20;
the third conductor unit 130 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the first layer, and the other first full-pitch conductor 160 is located at the fifth layer and the second layer;
the fourth conductor unit 140 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the first layer, and the other first full-pitch conductor 160 is located at the fifth layer and the second layer;
the second conductor set 150 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the third layer and the fourth layer, and the other first full-pitch conductor 160 is located at the third layer and the fourth layer;
in the present embodiment, the outgoing line terminal 30 is provided at the plug terminal 40 of any one of the phase windings, and is provided at the plug terminal 40 of any one of the second coil groups 70, specifically, as shown in fig. 6, any one of the phase windings 10 has two parallel branches, wherein, as shown in fig. 7, in one parallel branch, the U1 phase lead terminal is connected with an S-shaped conductor located at the 25-slot fourth layer of the stator core 20, the S-shaped conductor is connected with the first layer and the second layer parallel-wound third conductor unit 130 located at the fifth layer, the sixth layer and the 37-slot of the 31 st slot, the third conductor unit 130 parallel-wound and connected in series with one conductor in the second conductor group 150 located at the fourth layer and the third layer of the 43 th slot, the third conductor unit 130 parallel-wound and connected in series with the fifth layer, the sixth layer and the first layer and the second layer of the 1 st slot of the 43 th slot, the third conductor unit 130 connected in parallel is connected in series with one conductor in the second conductor group 150 of the fourth layer in the 1 st slot and the third layer in the 7 th slot, the conductor is connected in series with one conductor in the first layer and the second layer of the fifth layer, the sixth layer and the 13 th slot in the 7 th slot and the third conductor unit 130 connected in parallel, the third conductor unit 130 connected in parallel is connected in series with one conductor in the fourth layer in the 13 th slot and the second conductor group 150 of the 19 th slot and the third layer in the 19 th slot, the conductor is connected in series with the first conductor unit 100 connected in parallel in the fifth layer and the sixth layer of the 19 th slot and the 26 th slot, the first conductor unit 100 connected in parallel is connected in series with one conductor in the fourth layer in the 26 th slot and the second conductor group 150 in the third layer in the 32 th slot, the conductor is connected in series with the fifth layer, the sixth layer and the first conductor group 150 in the 38 th slot, The fourth conductor unit 140 of the second layer connected in parallel is connected in series, the fourth conductor unit 140 connected in parallel is connected in series with one conductor in the second conductor group 150 of the fourth layer of the 38 th slot and the third layer of the 44 th slot, the conductor is connected in series with the fourth conductor unit 140 of the fifth layer, the sixth layer and the 2 nd slot of the 44 th slot, the fourth conductor unit 140 connected in parallel is connected in series with one conductor in the second conductor group 150 of the fourth layer of the 2 nd slot and the third layer of the 8 th slot, the conductor is connected in series with the fourth conductor unit 140 connected in parallel and the fourth layer of the first layer, the sixth layer and the 14 th slot of the 8 th slot, the fourth conductor unit 140 connected in parallel is connected in series with one conductor in the second conductor group 150 of the fourth layer of the 14 th slot and the third layer of the 20 th slot, the conductor is connected with the second conductor unit 110 which is connected in series and is wound in the fifth layer and the sixth layer of the 20 th slot and the first layer and the second layer of the 25 th slot, the second conductor unit 110 which is connected in parallel and is connected in series with the S-shaped conductor which is connected with the U4 phase outlet end to form a parallel branch structure in any phase winding.
As shown in fig. 8, the other parallel branch is connected in the same manner as the parallel branch described above, except that the conductors in the respective conductor units and conductor sets are located in different layers in different slots.
Example two
As shown in fig. 9-11, the difference between the present embodiment and the first embodiment is that the leading-out wire end 30 of any phase winding is disposed at the plug wire end 40 of the phase winding, and the leading-out wire end 30 is disposed at the plug wire end 40 of the first coil group 60, and the rest of the arrangement and connection manners are the same, which will not be described herein again.
EXAMPLE III
As shown in fig. 12, compared with the first and second embodiments, the present embodiment is different in that the conductor pitch in the first conductor unit 100, the conductor pitch in the second unit conductor, and the conductor pitch in the first conductor group 120 in the first coil group 60 are all different from those in the first and second embodiments, the conductor pitch in the third conductor unit 130, the conductor pitch in the fourth conductor unit 140, and the conductor pitch in the second conductor group 150 in the second coil group 70 are all different from those in the first and second embodiments, and the rest of the arrangement modes and the connection modes are the same, and only the differences are described here, and the same parts are not repeated.
In the present embodiment, the first conductor unit 100 includes two second long-pitch conductors, one of which is located at the sixth layer and the first layer, and the other of which is located at the fifth layer and the second layer;
the second conductor unit 110 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the first layer, and the other first full-pitch conductor 160 is located at the fifth layer and the second layer;
the first conductor set 120 includes a second long-pitch conductor and a first full-pitch conductor 160, wherein the second long-pitch conductor is located at the third layer and the fourth layer, and the first full-pitch conductor 160 is located at the third layer and the fourth layer;
the third conductor unit 130 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the sixth layer and the first layer, and the other first long-pitch conductor 180 is located at the fifth layer and the second layer;
the fourth conductor unit 140 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the sixth layer and the first layer, and the other first long-pitch conductor 180 is located at the fifth layer and the second layer;
the second conductor set 150 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located in the third layer and the fourth layer, and the other first long-pitch conductor 180 is located in the third layer and the fourth layer.
Example four
As shown in fig. 13, the difference between the third embodiment and the first, second, and third embodiments is that the conductor pitch in the first conductor unit 100, the conductor pitch in the second unit, and the conductor pitch in the first conductor group 120 in the first coil group 60 are different from those in the first, second, and third embodiments, the conductor pitch in the third conductor unit 130, the conductor pitch in the fourth conductor unit 140, and the conductor pitch in the second conductor group 150 in the second coil group 70 are different from those in the first, second, and third embodiments, and the rest of the arrangement and connection are the same, and only the differences are described here, and the same parts are not repeated.
In the present embodiment, the first conductor unit 100 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the first layer, and the other first full-pitch conductor 160 is located at the fifth layer and the second layer;
the second conductor unit 110 includes two second short-pitch conductors 190, wherein one second short-pitch conductor 190 is located at the sixth layer and the first layer, and the other second short-pitch conductor 190 is located at the fifth layer and the second layer;
the first conductor set 120 includes a first full-pitch conductor 160 and a second short-pitch conductor 190, wherein the first full-pitch conductor 160 is located at the third layer and the fourth layer, and the second short-pitch conductor 190 is located at the third layer and the fourth layer;
the third conductor unit 130 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the sixth layer and the first layer, and the other first short-pitch conductor 170 is located at the fifth layer and the second layer;
the fourth conductor unit 140 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the sixth layer and the first layer, and the other first short-pitch conductor 170 is located at the fifth layer and the second layer;
the second conductor set 150 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the third layer and the fourth layer, and the other first short-pitch conductor 170 is located at the third layer and the fourth layer.
EXAMPLE five
As shown in fig. 14 to 18, compared with the first embodiment, the present embodiment is different from the first embodiment in that the number of layers of the stator core 20 on which the conductors in the first conductor unit 100 are arranged, the number of layers of the stator core 20 on which the conductors in the second conductor unit 110 are arranged, the number of layers of the stator core 20 on which the conductors in the third conductor unit 130 are arranged, and the number of layers of the stator core 20 on which the conductors in the fourth conductor unit 140 are arranged are different from those in the first embodiment, and the rest of the arrangement modes and the connection modes are the same, and are not described again here.
In the present embodiment, the first conductor unit 100 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the sixth layer and the second layer, and the other first long-pitch conductor 180 is located at the fifth layer and the first layer;
the second conductor unit 110 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the sixth layer and the second layer, and the other first short-pitch conductor 170 is located at the fifth layer and the first layer;
the third conductor unit 130 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the second layer, and the other first full-pitch conductor 160 is located at the fifth layer and the first layer;
the fourth conductor unit 140 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the second layer, and the other first full-pitch conductor 160 is located at the fifth layer and the first layer.
EXAMPLE six
As shown in fig. 19, compared with the fifth embodiment, the difference between the present application and the fifth embodiment is that the leading-out wire end 30 of any phase winding is disposed at the plug wire end 40 of the phase winding, and the leading-out wire end 30 is disposed at the plug wire end 40 of the first coil group 60, and the rest of the disposing manners and the connection manners are the same, and are not described again here.
EXAMPLE seven
As shown in fig. 20, compared with the fifth and sixth embodiments, the present embodiment is different from the fifth and sixth embodiments in that the conductor pitch of the first conductor unit 100, the conductor pitch of the second unit conductor, and the conductor pitch of the first conductor group 120 in the first coil group 60 are different from those in the fifth and sixth embodiments, the conductor pitch of the third conductor unit 130, the conductor pitch of the fourth conductor unit 140, and the conductor pitch of the second conductor group 150 in the second coil group 70 are different from those in the fifth and sixth embodiments, and the rest of the arrangement and connection manners are the same, and only the differences are described here, and the same parts are not repeated.
In the present embodiment, the first conductor unit 100 includes two second long-pitch conductors, one of which is located at the sixth layer and the first layer, and the other of which is located at the fifth layer and the second layer;
the second conductor unit 110 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the first layer, and the other first full-pitch conductor 160 is located at the fifth layer and the second layer;
the first conductor set 120 includes a second long-pitch conductor and a first full-pitch conductor 160, wherein the second long-pitch conductor is located at the third layer and the fourth layer, and the first full-pitch conductor 160 is located at the third layer and the fourth layer;
the third conductor unit 130 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the sixth layer and the first layer, and the other first long-pitch conductor 180 is located at the fifth layer and the second layer;
the fourth conductor unit 140 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located at the sixth layer and the first layer, and the other first long-pitch conductor 180 is located at the fifth layer and the second layer;
the second conductor set 150 includes two first long-pitch conductors 180, wherein one first long-pitch conductor 180 is located in the third layer and the fourth layer, and the other first long-pitch conductor 180 is located in the third layer and the fourth layer.
Example eight
As shown in fig. 21, compared with the fifth, sixth, and seventh embodiments, the difference between the present embodiment and the fifth, sixth, and seventh embodiments is that the pitch of the conductors in the first conductor unit 100, the pitch of the conductors in the second unit, and the pitch of the conductors in the first conductor group 120 in the first coil group 60 are all different from those in the fifth, sixth, and seventh embodiments, the pitch of the conductors in the third conductor unit 130, the pitch of the conductors in the fourth conductor unit 140, and the pitch of the conductors in the second conductor group 150 in the second coil group 70 are all different from those in the fifth, sixth, and seventh embodiments, the remaining arrangement and connection are the same, and only the differences are described here, and the same parts are not repeated.
In the present embodiment, the first conductor unit 100 includes two first full-pitch conductors 160, wherein one first full-pitch conductor 160 is located at the sixth layer and the first layer, and the other first full-pitch conductor 160 is located at the fifth layer and the second layer;
the second conductor unit 110 includes two second short-pitch conductors 190, wherein one second short-pitch conductor 190 is located at the sixth layer and the first layer, and the other second short-pitch conductor 190 is located at the fifth layer and the second layer;
the first conductor set 120 includes a first full-pitch conductor 160 and a second short-pitch conductor 190, wherein the first full-pitch conductor 160 is located at the third layer and the fourth layer, and the second short-pitch conductor 190 is located at the third layer and the fourth layer;
the third conductor unit 130 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the sixth layer and the first layer, and the other first short-pitch conductor 170 is located at the fifth layer and the second layer;
the fourth conductor unit 140 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the sixth layer and the first layer, and the other first short-pitch conductor 170 is located at the fifth layer and the second layer;
the second conductor set 150 includes two first short-pitch conductors 170, wherein one first short-pitch conductor 170 is located at the third layer and the fourth layer, and the other first short-pitch conductor 170 is located at the third layer and the fourth layer.
Due to the adoption of the technical scheme, the stator winding adopts conductors with different specifications, the conductors with smaller cross-sectional areas are positioned at the outermost side and the innermost side of the stator core, the conductors with larger cross-sectional areas are positioned between the outermost side and the innermost layer of the stator core, and because the alternating current loss of the winding layer arranged at the innermost side is larger than the alternating current loss of the winding layer arranged at the outermost side under the influence of the proximity effect, the preparation of the stator winding is carried out by adopting the conductors with different specifications, the alternating current loss of the stator can be effectively reduced, and simultaneously, the slot occupation rate is reduced and the direct current loss is increased because a plurality of conductors with smaller cross-sectional areas are used, so that the stator achieves the purposes of reducing the influence of the proximity effect and reducing the overall loss; the conductors in the stator winding are the same type of conductors except the conductor connected with the outgoing line end, the conductor type is single, the structure of the stator winding is simple, the preparation process is simple, the outgoing line end can be led out at any position of a plug wire end or any position of a welding end of the stator winding, and loop current is cancelled.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (19)

1. An electric machine stator winding comprising a multi-phase winding, characterized in that: any phase winding comprises at least one first coil group and a plurality of second coil groups, the first coil groups and the second coil groups are sequentially arranged along the circumferential direction of the stator core and are sequentially connected, and the second coil groups are arranged on two sides of the first coil groups;
the first coil group comprises a first conductor unit, a second conductor unit and a first conductor group, the first conductor unit and the second conductor unit are arranged in adjacent slots along the circumferential direction of the stator core, the first conductor unit and the second conductor unit are arranged on the same radial layer of the stator core, the first conductor unit is arranged on the outermost adjacent two layers and the innermost adjacent two layers of the stator core, and the first conductor group is arranged on any two radial layers of the stator core between the outermost adjacent two layers and the innermost adjacent two layers;
the second coil group comprises a third conductor unit, a fourth conductor unit and a second conductor group, the third conductor unit and the fourth conductor unit are arranged in adjacent slots along the circumferential direction of the stator core, the third conductor unit and the fourth conductor unit are arranged on the same radial layer of the stator core, the third conductor unit is arranged on the outermost adjacent layer and the innermost adjacent layer of the stator core, and the second conductor group is arranged on any two radial layers of the stator core between the outermost adjacent layer and the innermost adjacent layer;
the cross-sectional area of the conductor in the first conductor unit and the cross-sectional area of the conductor in the second conductor unit are both smaller than the cross-sectional area of any conductor in the first conductor group;
the cross-sectional area of the conductor in the third conductor unit and the cross-sectional area of the conductor in the fourth conductor unit are both smaller than the cross-sectional area of any conductor in the second conductor group;
the conductors in the first conductor unit, the second conductor unit, the third conductor unit and the fourth conductor unit are connected in parallel;
the winding of any phase further comprises an outgoing line end, the outgoing line end is arranged at a plug wire end or a welding end of the winding of any phase, and the outgoing line end is constructed by opening any position of the plug wire end or the welding end.
2. The stator winding of an electric machine of claim 1, wherein: the total number of the first conductor units and the second conductor units corresponds to the number of all conductors in the first conductor set;
the total number of the third conductor units and the fourth conductor units corresponds to the number of all the conductors in the second conductor set.
3. The stator winding of an electric machine of claim 2, wherein: the position of the first conductor unit in the slot of the stator core is the same as the position of one conductor in the first conductor group in the slot of the stator core, and the position of the second conductor unit in the slot of the stator core is the same as the position of the other conductor in the first conductor group in the slot of the stator core;
the position of the third conductor unit in the slot of the stator core is the same as the position of one conductor in the second conductor group in the slot of the stator core, and the position of the fourth conductor unit in the slot of the stator core is the same as the position of the other conductor in the second conductor group in the slot of the stator core.
4. The stator winding of an electric machine of claim 1, wherein: the sum of the cross-sectional areas of all the conductors in the first conductor unit and the sum of the cross-sectional areas of all the conductors in the second conductor unit are not smaller than the cross-sectional area of any conductor in the first conductor group;
the sum of the cross-sectional areas of all the conductors in the third conductor unit and the sum of the cross-sectional areas of all the conductors in the fourth conductor unit are not smaller than the cross-sectional area of any one conductor in the second conductor group.
5. A stator winding for an electrical machine according to any of claims 1-4, wherein: the first conductor unit includes two first long-pitch conductors, one of which is located at a radially outermost and innermost layer of the stator core, and the other of which is located at a radially (outermost-1) layer and (innermost +1) layer of the positioning core, or one of which is located at a radially outermost and (innermost +1) layer of the stator core, and the other of which is located at a radially (outermost-1) layer and an innermost layer of the positioning core;
the second conductor unit includes two first short-pitch conductors, one of which is located at a radially outermost and innermost layer of the stator core and the other of which is located at a radially (outermost-1) and (innermost +1) layer of the positioning core, or one of which is located at a radially outermost and (innermost +1) layer of the stator core and the other of which is located at a radially (outermost-1) and innermost layer of the positioning core; the third conductor unit and the fourth conductor unit comprise two first full-pitch conductors, wherein one first full-pitch conductor is positioned on the radially outermost layer and the radially innermost layer of the stator core, and the other first full-pitch conductor is positioned on the radially (outermost layer-1) layer and the (innermost layer +1) layer of the positioning core;
or, one of the first full-pitch conductors is located at the radially outermost and (innermost +1) layers of the stator core, and the other of the first full-pitch conductors is located at the radially (outermost-1) and innermost layers of the positioning core.
6. The stator winding of an electric machine of claim 5, wherein: the pitch of the first long-pitch conductor is 7, the pitch of the first short-pitch conductor is 5, and the pitch of the first full-pitch conductor is 6.
7. A stator winding for an electrical machine according to any of claims 1-4, wherein: the first conductor unit includes two second long-pitch conductors, one of which is located at a radially outermost layer and an innermost layer of the stator core, and the other of which is located at a radially (outermost-1) layer and an (innermost +1) layer of the positioning core, or one of which is located at a radially outermost layer and an (innermost +1) layer of the stator core and the other of which is located at a radially (outermost-1) layer and an innermost layer of the positioning core;
the second conductor unit includes two first full-pitch conductors, wherein one of the first full-pitch conductors is located at a radially outermost layer and an innermost layer of the stator core, and the other of the first full-pitch conductors is located at a radially (outermost-1) layer and an (innermost +1) layer of the positioning core, or one of the first full-pitch conductors is located at a radially outermost layer and an (innermost +1) layer of the stator core, and the other of the first full-pitch conductors is located at a radially (outermost-1) layer and an innermost layer of the positioning core; the third conductor unit and the fourth conductor unit comprise two first long-pitch conductors, wherein one first long-pitch conductor is positioned on the radially outermost layer and the radially innermost layer of the stator core, and the other first long-pitch conductor is positioned on the radially (outermost layer-1) layer and the (innermost layer +1) layer of the positioning core;
or, one of the first long-pitch conductors is located at a radially outermost layer and (innermost +1) layer of the stator core, and the other of the first long-pitch conductors is located at a radially (outermost-1) layer and an innermost layer of the positioning core.
8. The stator winding of an electric machine of claim 7, wherein: the second long-pitch conductor has a pitch of 8.
9. A stator winding for an electrical machine according to any of claims 1-4, wherein: the first conductor unit comprises two first full-pitch conductors, wherein one of the first full-pitch conductors is located at the radially outermost layer and the radially innermost layer of the stator core, and the other of the first full-pitch conductors is located at the radially (outermost-1) layer and the (innermost +1) layer of the positioning core, or one of the first full-pitch conductors is located at the radially outermost layer and the (innermost +1) layer of the stator core, and the other of the first full-pitch conductors is located at the radially (outermost-1) layer and the innermost layer of the positioning core;
the second conductor unit includes two second short-pitch conductors, one of which is located at a radially outermost and innermost layer of the stator core and the other of which is located at a radially (outermost-1) and (innermost +1) layer of the positioning core, or one of which is located at a radially outermost and (innermost +1) layer of the stator core and the other of which is located at a radially (outermost-1) and innermost layer of the positioning core; the third conductor unit and the fourth conductor unit each include two first short-pitch conductors, one of which is located at the radially outermost and innermost layers of the stator core, and the other of which is located at the radially (outermost-1) and (innermost +1) layers of the positioning core;
or, one of the first short-pitch conductors is located at a radially outermost layer and (innermost +1) layer of the stator core, and the other of the first short-pitch conductors is located at a radially (outermost-1) layer and an innermost layer of the positioning core.
10. The stator winding of an electric machine of claim 9, wherein: the second short-pitch conductor has a pitch of 4.
11. A stator winding for an electrical machine according to any one of claims 1-4, 6, 8 and 10, wherein: the first conductor group and the second conductor group are arranged on two layers which are adjacent to each other in the radial direction of the stator core.
12. The stator winding of an electric machine of claim 5, wherein: the first conductor group comprises a first long-pitch conductor and a first short-pitch conductor, and the first long-pitch conductor is arranged around the outside of the first short-pitch conductor;
the second conductor group comprises two first full-pitch conductors, and the two first full-pitch conductors are arranged in adjacent slots of the same radial layer of the stator core.
13. The stator winding of an electric machine of claim 7, wherein: the first conductor group comprises a second long-pitch conductor and a first full-pitch conductor, and the second long-pitch conductor is arranged around the outside of the first full-pitch conductor;
or the second conductor group comprises two first long-pitch conductors, and the two first long-pitch conductors are arranged in adjacent slots of the same radial layer of the stator core.
14. The stator winding of an electric machine of claim 9, wherein: the first conductor group comprises a first full-pitch conductor and a second short-pitch conductor, and the first full-pitch conductor is arranged around the outside of the second short-pitch conductor;
the second conductor group comprises two first short-pitch conductors, and the two first short-pitch conductors are arranged in adjacent slots of the same radial layer of the stator core.
15. The stator winding of an electric machine of claim 1, wherein: the number of radial layers of the stator core is an even number of layers which is more than or equal to 6.
16. A stator winding for an electrical machine according to claim 1 or 18, wherein: and any phase winding comprises at least two parallel branches, wherein in each parallel branch, in two adjacent coil groups, the conductor in one conductor unit in one coil group is connected in parallel and is connected in series with one conductor in the conductor group in the other coil group.
17. The stator winding of an electric machine of claim 19, wherein: in any parallel branch, when the leading-out wire end is arranged at the plug wire end, the conductors respectively connected with the leading-out wire end and the leading-out wire end are S-shaped conductors;
when the leading-out wire end is arranged at the welding end, the conductors respectively connected with the leading-out wire end and the leading-out wire end are all U-shaped conductors.
18. A stator, characterized by: comprising a stator winding of an electrical machine according to any of claims 1-17.
19. An electric machine characterized by: comprising a stator according to claim 18.
CN202111386378.6A 2021-11-22 2021-11-22 Motor stator winding, stator and motor Active CN114123592B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011135733A (en) * 2009-12-25 2011-07-07 Aisin Seiki Co Ltd Rotating electric machine
US20180152070A1 (en) * 2016-11-25 2018-05-31 Delta Electronics, Inc. Stator
CN108110917A (en) * 2016-11-25 2018-06-01 台达电子工业股份有限公司 Stator
US20190149001A1 (en) * 2017-11-14 2019-05-16 Borgwarner Inc. Electric machine with variable cross section stator windings
CN212277995U (en) * 2020-04-09 2021-01-01 吉利汽车研究院（宁波）有限公司 Stator structure with winding wire section changes and flat wire motor
CN214626541U (en) * 2021-05-14 2021-11-05 天津市松正电动汽车技术股份有限公司 Motor stator and motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011135733A (en) * 2009-12-25 2011-07-07 Aisin Seiki Co Ltd Rotating electric machine
US20180152070A1 (en) * 2016-11-25 2018-05-31 Delta Electronics, Inc. Stator
CN108110917A (en) * 2016-11-25 2018-06-01 台达电子工业股份有限公司 Stator
US20190149001A1 (en) * 2017-11-14 2019-05-16 Borgwarner Inc. Electric machine with variable cross section stator windings
CN212277995U (en) * 2020-04-09 2021-01-01 吉利汽车研究院（宁波）有限公司 Stator structure with winding wire section changes and flat wire motor
CN214626541U (en) * 2021-05-14 2021-11-05 天津市松正电动汽车技术股份有限公司 Motor stator and motor

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