CN113708521A - Wound motor stator and motor - Google Patents
Wound motor stator and motor Download PDFInfo
- Publication number
- CN113708521A CN113708521A CN202111235431.2A CN202111235431A CN113708521A CN 113708521 A CN113708521 A CN 113708521A CN 202111235431 A CN202111235431 A CN 202111235431A CN 113708521 A CN113708521 A CN 113708521A
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- inner ring
- outer ring
- groove
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- 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
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
Abstract
The invention provides a wound motor stator and a motor, wherein the stator winding is characterized in that a coil which is correspondingly arranged on each phase of winding comprises a 1 st coil and a 2 nd coil, the 1 st coil and the 2 nd coil respectively comprise an outer ring and an inner ring, the outer ring and the inner ring are respectively arranged in a groove of an iron core groove of the stator in a way that a single-layer conductor is wound in the same layer and are sequentially stacked along the radial direction of a stator iron core, and two grooves of each outer ring are arranged on the circumferentially adjacent outer sides of two grooves of the inner ring of the corresponding coil; the winding directions of the outer ring and the inner ring in the same coil are the same, and the winding directions of the 1 st coil and the 2 nd coil are the same. By adopting the technical scheme, the electric field intensity between conductors in the slot is reduced, corona generation is reduced, further corrosion to insulation is reduced, the insulation life is prolonged, the size of an insulation layer is effectively reduced, the slot filling rate of the motor is improved, the axial end part height of the stator winding is reduced, the overall performance of the motor is improved, and the motor miniaturization is realized.
Description
Technical Field
The invention relates to the field of motors, in particular to a wound motor stator and a motor.
Background
In the prior art, a stator winding of a motor is in a wave winding connection mode, the wave winding connection mode is from the outermost layer to the inner layer, and the wave winding mode is analyzed from electrical connection, and the voltage difference of conductors among different layers in the same slot is high;
in the conventional art, since a more favorable magnetomotive force waveform can be obtained when the number q of slots per pole per phase is 2 than when q is 1, and the characteristics of the rotating electric machine are improved, the motor may be configured under the condition that the number q of slots per pole per phase is 2. In this case, since the respective conductors are stacked outside the stator core shaft, the axial end portion of the stator winding is protruded to a large height, which leads to an increase in size of the motor.
Disclosure of Invention
The invention mainly aims to provide a motor stator and a motor, which can reduce the electric field intensity between conductors in a slot, separate windings of all phases of conductors outside the slot, reduce corona generation, further reduce insulation corrosion, prolong the insulation life, effectively reduce the size of an insulation layer, improve the slot filling rate of the motor, reduce the axial end height of a stator winding, improve the overall performance of the motor and realize motor miniaturization.
In order to achieve the above object, according to one aspect of the present invention, there is provided a wound motor stator including:
a stator core having a plurality of core slots, a plurality of open core slots being formed on a radially inner surface of the stator core and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;
a stator winding including a plurality of phase windings mounted on the stator core,
the coils correspondingly arranged on each phase of winding comprise a 1 st coil and a 2 nd coil, the 1 st coil and the 2 nd coil respectively comprise an outer ring and an inner ring, the outer ring and the inner ring are both arranged in the slots of the iron core slots of the stator in a single-layer conductor same-layer winding mode and are sequentially stacked along the radial direction of the stator iron core, and the two slots of each outer ring are arranged on the circumferentially adjacent outer sides of the two slots of the inner ring of the corresponding coil;
the winding directions of the outer ring and the inner ring in the same coil are the same, and the winding directions of the 1 st coil and the 2 nd coil are the same.
Further, the outer ring and the inner ring of the 1 st coil respectively comprise a pair of axial parts extending along the axial direction of the stator core, the pair of axial parts are connected with each other along the circumferential direction after the coil end part outside the stator core is bent, and the bending directions of two adjacent 1 st coil conductors are opposite.
Further, the outer ring and the inner ring in the 2 nd coil each include a pair of axial portions extending in the axial direction of the stator core, the pair of axial portions are folded back at coil end portions outside the stator core toward the outside of the axial end face of the stator core to form a pair of folded-back portions, the pair of folded-back portion end portions are connected to each other in the circumferential direction after being folded, the folded-back portions of the 2 nd coil outer ring and the inner ring are both the same in direction and height, the inner ring and the outer ring in the same coil span in the circumferential direction, and the folding directions of two adjacent 2 nd coil conductors are opposite.
Further, when viewed from the axial direction of the stator core, the height of the end in the axial direction of the phase winding is the sum of the height of the folded portion of the 2 nd coil and the conductor width of the outer ring and the inner ring of the 1 st coil at the coil end.
Furthermore, the connection mode of each phase of winding is that an outer ring and an inner ring of one coil in the 1 st coil or the 2 nd coil form a whole and then are connected with the other coil in the circumferential direction.
Furthermore, every phase winding includes the 1 st coil and the 2 nd coil of two relative settings that set up of two relative settings, and every phase winding is a branch way series connection structure, and the 1 st coil inner circle, the 1 st coil outer lane, the 2 nd coil inner circle, the 2 nd coil outer lane of series connection in proper order between its two lead wires, the 1 st coil inner circle of offside, the 1 st coil outer lane of offside and the 2 nd coil inner circle of offside, the 2 nd coil outer lane of offside.
Further, the air conditioner is provided with a fan,
each phase winding comprises two oppositely arranged 1 st coils and two oppositely arranged 2 nd coils, and each phase winding is of a two-branch parallel structure;
the 1 st coil outer ring, the 2 nd coil inner ring, the 1 st coil outer ring on the opposite side and the 2 nd coil inner ring on the opposite side are sequentially connected in series between the two leads of the first branch circuit;
the 1 st coil inner circle, the 2 nd coil outer circle, the 1 st coil inner circle of offside and the 2 nd coil outer circle of offside that connect in series in proper order between two lead wires of second branch road. According to another aspect of the present invention, there is provided an electric machine comprising the electric machine stator described above.
The invention has the beneficial effects that:
by applying the technical scheme of the invention, the motor stator comprises: a stator core having a plurality of core slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;
a stator winding including a plurality of phase windings mounted on the stator core,
the coils correspondingly arranged on each phase of winding comprise a 1 st coil and a 2 nd coil, the 1 st coil and the 2 nd coil respectively comprise an outer ring and an inner ring, the outer ring and the inner ring are both arranged in the slots of the iron core slots of the stator in a single-layer conductor same-layer winding mode and are sequentially stacked along the radial direction of the stator iron core, and the two slots of each outer ring are arranged on the circumferentially adjacent outer sides of the two slots of the inner ring of the corresponding coil;
the winding directions of the outer ring and the inner ring in the same coil are the same, and the winding directions of the 1 st coil and the 2 nd coil are the same.
1. By adopting the structure of winding the single-layer conductors on the same layer, the voltage difference of the conductors in the same groove can be effectively uniformly distributed, and the voltage difference of the conductors with different layers in the same groove can be reduced, so that the electric field intensity is reduced, the corona generation is reduced, the corrosion to insulation is reduced, and the insulation life is prolonged.
2. Effectively reduce the insulating layer size, can increase the same area in the groove simultaneously, improve the full rate in groove of motor, improve the wholeness ability of motor.
3. And the structure adopts a structure of winding a single-layer conductor on the same layer, welding spots are concentrated on one side, and the number of the welding spots can be greatly reduced.
4. The coil types are few, and only two concentric coils are provided.
The electric field intensity between the conductors in the slot is reduced, corona generation is reduced, the separation between the windings of all phases of the conductors outside the slot is realized, further, the corrosion to insulation is reduced, the insulation life is prolonged, the size of an insulation layer is effectively reduced, the slot filling rate of the motor is improved, the axial end part height of a stator winding is reduced, the overall performance of the motor is improved, and the motor miniaturization is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a stator of a motor according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a phase winding of a stator winding according to one embodiment of the present invention;
FIG. 3 is a schematic front view of the inner ring and the outer ring of coil 1 in the embodiment of the present invention;
FIG. 4 is a schematic side view of the inner ring and the outer ring of the 1 st coil in the embodiment of the present invention;
FIG. 5 is a schematic diagram of the side view of the inner ring and the outer ring of the 2 nd coil in the embodiment of the invention;
FIG. 6 is a schematic plane development of a shunt series configuration of phase windings in an embodiment of the present invention;
FIG. 7 is a schematic plane development view of a two-branch parallel structure of a phase winding in the second embodiment of the present invention;
fig. 8 is a perspective view of a high-level part of the axial end of the stator winding according to the first embodiment of the present invention;
fig. 9 is a schematic plan development view of a structure of a high part of an axial end part of a stator winding in the first embodiment of the invention.
Wherein:
10. the stator comprises a stator winding, 20 stator cores, 21 core slots, 150A, 1 st coil outer ring, 150B, 1 st coil inner ring, 300A, 2 nd coil outer ring, 300B, 2 nd coil inner ring, 300Aa. 2 nd coil outer ring folded part, 300Ab. 2 nd coil outer ring connecting part, 300Ba. nd coil inner ring folded part and 300Bb. nd coil inner ring connecting part.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.
As shown in fig. 1, an embodiment of the present invention provides a stator of an electric motor, including: a stator core 20, the stator core 20 having a plurality of core slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;
as shown in fig. 1, 2, 6, and 7, in the first embodiment, the stator winding 10 is a stator winding 10, and the stator winding 10 is mounted on the stator core 20, that is, a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, wherein the stator winding 10 is a three-phase (i.e., U-phase winding, V-phase winding, W-phase winding) winding, and each phase slot of each pole is equal to 2; two slots are provided for each pole of the rotor, 2 slots per pole per phase in the present embodiment, the rotor has eight poles, and this is true for each phase of the three-phase stator winding 10, the number of slots provided in the stator core 20 is equal to 48 (i.e., 2X8X3), the pitch is equal to the number of phases per stator winding X the number of slots per pole per phase, the conductors having a pitch less than the pitch are short-pitch conductors, the conductors having a pitch equal to the pitch are full-pitch conductors, the conductors having a pitch greater than the pitch are long-pitch conductors, and in the present embodiment, the pitch is equal to 2X3 equal to 6; further, in the present embodiment, the stator core 20 is formed by stacking a plurality of annular magnetic steel plates to form the stator core 20 having two end faces in the axial direction by defining one tooth portion by two adjacent slots, and other conventional metal plates may be used instead of the magnetic steel plates.
Referring to fig. 1 and 2, a plurality of coils are mounted in slots of a core slot of a stator in a manner that a single-layer conductor is wound in the same layer, and the coils include a 1 st coil outer ring 150A, a 1 st coil inner ring 150B, a 2 nd coil outer ring 300A, and a 2 nd coil inner ring 300B, and the outer and inner rings are sequentially wound and laminated in the radial direction of the stator core in a manner that a single conductor is wound in the same layer in 2 slots spaced apart by a predetermined slot pitch in the circumferential direction of the stator core, and occupy the slots. The same coil and the same layer of conductor are in a concentric form, the winding directions of an outer ring and an inner ring in the same coil are the same, and the winding directions of a No. 1 coil and a No. 2 coil are the same.
Referring to fig. 6 and 7, two slots of the 1 st coil outer ring 150A are located in the first slot, the eighth slot, two slots of the 1 st coil inner ring 150B corresponding thereto are located in the second slot, the seventh slot, two slots of the 1 st coil outer ring 150A are located on the circumferentially adjacent outer side of two slots of the 1 st coil inner ring 150B corresponding thereto, two slots of the 2 nd coil outer ring 300A are located in the thirteenth slot, the twentieth slot, two slots of the 2 nd coil inner ring 300B corresponding thereto are located in the fourteenth slot, the nineteenth slot, and two slots of the 2 nd coil outer ring 300A are located on the circumferentially adjacent outer side of two slots of the 2 nd coil inner ring 300B. The winding directions of the outer ring and the inner ring in the same coil are the same, and the winding directions of the 1 st coil and the 2 nd coil are the same.
As shown in fig. 1 and 8, each of the 1 st coil outer ring 150A and the 1 st coil inner ring 150B includes a pair of axial portions extending in the axial direction of the stator core, the pair of axial portions are connected to each other in the circumferential direction after the coil end portion outside the stator core is bent, and the bending directions of the adjacent two 1 st coil conductors are opposite. For example, one conductor of one 1 st outer coil loop 150A is bent to the left, and the other conductor of the adjacent 1 st outer coil loop 150A is bent to the right.
Referring to fig. 2, 3, 4 and 5, each of the 2 nd coil outer ring 300A and the 2 nd coil inner ring 300B includes a pair of axial portions extending in the axial direction of the stator core, the pair of axial portions being folded back at the coil end portion outside the stator core to form a pair of folded-back portions, the 2 nd coil outer ring folded-back portion 300Aa and the 2 nd coil inner ring folded-back portion 300Ba being connected to each other in the circumferential direction after the pair of folded-back portion end portions are folded back to form a 2 nd coil outer ring connecting portion 300Ab, the 2 nd coil inner ring connecting portion 300Bb, the 2 nd coil outer ring and the inner ring having the same folded-back portion direction and height H3, that is, the 2 nd coil outer ring 300A and the 2 nd coil inner ring 300B both span the 2 nd coil outer ring 300Aa and the 2 nd coil inner ring 300Ba in the circumferential direction and height H3 are the same and the same coil inner ring and the inner ring in the circumferential direction, the bending directions of two adjacent 2 nd coil conductors are opposite. For example, one conductor of one 2 nd coil outer 300A is bent to the left, and the conductor of the other 2 nd coil outer 300A adjacent thereto is bent to the right.
Further, the outer ends of the coil slots of the 1 st coil and the 2 nd coil of the adjacent phase windings are separated among the phase windings, and with reference to fig. 1 and 8, the coil end of one 2 nd coil of the U-phase windings positioned in the 1 st slot, the 2 nd slot, the 7 th slot and the 8 th slot of the stator core (the coil end of the 2 nd coil includes a pair of folded portions formed by folding the coil end toward the outside of the axial end face of the stator core, and the pair of folded portions are connected to each other in the circumferential direction after being folded) is not in contact with (i.e., separated from) the upper surface of the 2 nd coil inner ring 300B (or the 2 nd coil outer ring 300A) of the adjacent different phase winding at the lower surface of the 1 st coil inner ring 150B because the folded portions of the coil end of the 2 nd coil are not in contact with (i.e., separated from) the coil end of one 1 st coil of the V-phase windings positioned in the 3 rd slot, the 4 th slot, the 45 th slot and the 46 th slot of the stator core (the coil end are connected to each other in the circumferential direction after being folded, referring to fig. 8, the coil end of the 1 st coil of the V-phase winding in the 3 rd slot, the 4 th slot, the 45 th slot and the 46 th slot of the stator core is not in contact with (i.e. separated from) the coil end of the 1 st coil of the W-phase winding in the 5 th slot, the 6 th slot, the 11 th slot and the 12 th slot of the stator core due to the opposite bending directions in the coil ends of the two 1 st coil conductors of the two adjacent phase windings, but the coil ends of the conductors of the phase windings of the non-hairpin machine are in the same direction and are stacked, so that the structure of the present application reduces corrosion to the insulation and improves the insulation life.
Referring to fig. 1, 8, and 9, when viewed in the axial direction of the stator core, the height H of the phase winding axial end portion is the sum of the height H3 of the 2 nd coil outer ring folded portion 300Aa (or the 2 nd coil inner ring folded portion 300 Ba), the conductor width H1 of the 1 st coil outer ring 150A, and the conductor width H2 of the 1 st coil inner ring 150B at the coil end portion. The axial end height of the stator winding is effectively reduced (the reasonable gap between the coils is neglected by the height H of the application).
With reference to fig. 6, in the first embodiment, each phase winding is a branch series structure, the 1 st coil inner ring 150B, the 1 st coil outer ring 150A, the 2 nd coil inner ring 300B, the 2 nd coil outer ring 300A, the 1 st coil inner ring 150B, the 1 st coil outer ring 150A, the 2 nd coil inner ring 300B, and the 2 nd coil outer ring 300A are sequentially connected in series between two leads thereof, and the connection mode of each phase winding is that one outer ring and one inner ring of one coil of the 1 st coil or the 2 nd coil form an integral and then are connected with the other coil in the circumferential direction.
The U1 phase lead terminals (terminals) enter from the 01 layer 02 groove of the 1 st coil inner ring 150B, sequentially pass through the 01 layer 07 groove, the 02 layer 02 groove, the 02 layer 07 groove, the 03 layer 02 groove, the 03 layer 07 groove, the 04 layer 02 groove, the 04 layer 07 groove to the 04 layer 01 groove, the 04 layer 08 groove, the 03 layer 01 groove, the 03 layer 08 groove, the 02 layer 01 groove, the 02 layer 08 groove, the 01 layer 01 groove, and the 01 layer 08 groove of the 1 st coil outer ring 150A, are welded to the 2 nd coil inner ring 300B at the 04 layer 14 groove, sequentially pass through the 04 layer 19 groove, the 03 layer 14 groove, the 03 layer 19 groove, the 02 layer 14 groove, the 01 layer 19 groove to the 01 layer 13 groove of the 2 nd coil outer ring 300A, the 01 layer 20 groove, the 02 layer 13 groove, the 03 layer 20 groove, the 04 layer 13 groove, the 04 layer 20 groove, the 01 layer 20 groove, and the 01 layer 20 groove of the inner ring 150B, sequentially pass through the 01 layer 02 layer 26 groove, the 02 layer 31 groove, and the 02 layer 31 groove, The wire ends (lead ends) of the 03-layer 26 groove, the 03-layer 31 groove, the 04-layer 26 groove, the 04-layer 25 groove, the 04-layer 32 groove, the 03-layer 25 groove, the 03-layer 32 groove, the 02-layer 25 groove, the 02-layer 32 groove, the 01-layer 25 groove, and the 01-layer 32 groove from the 04-layer 31 groove to the 1 st coil outer ring 150A are welded to the 2 nd coil inner ring 300B in the 04-layer 38 groove, and then go through the 04-layer 43 groove, the 03-layer 38 groove, the 03-layer 43 groove, the 02-layer 38 groove, the 02-layer 43 groove, the 01-layer 38 groove, the 01-layer 43 groove from the 01-layer 37 groove, the 01-layer 44 groove, the 02-layer 37 groove, the 02-layer 44 groove, the 03-layer 37 groove, the 04-layer 37 groove, and the 04-layer 44 groove U2 in this order.
With reference to fig. 7, in the second embodiment, each phase winding is in a two-branch parallel structure.
The 1 st coil outer ring 150A, the 2 nd coil inner ring 300B, the 1 st coil outer ring 150A and the 2 nd coil inner ring 300B are connected in series between the two leads of the first branch.
And a 1 st coil inner ring 150B, a 2 nd coil outer ring 300A, a 1 st coil inner ring 150B and a 2 nd coil outer ring 300A which are sequentially connected in series between the two leads of the second branch.
The U1 phase lead terminals (lead terminals) enter from the 01 layer 01 groove of the 1 st coil outer ring 150A, sequentially pass through the 01 layer 08 groove, the 02 layer 01 groove, the 02 layer 08 groove, the 03 layer 01 groove, the 03 layer 08 groove, the 04 layer 01 groove, and the 04 layer 08 groove, then are welded to the 01 layer 14 groove of the 2 nd coil inner ring 300B, sequentially pass through the 01 layer 19 groove, the 02 layer 14 groove, the 02 layer 19 groove, the 03 layer 14 groove, the 03 layer 19 groove, the 04 layer 14 groove, and the 04 layer 19 groove, then are welded to the 1 st coil outer ring 150A at the 01 layer 25 groove, sequentially pass through the 01 layer 32 groove, the 02 layer 25 groove, the 02 layer 32 groove, the 03 layer 25 groove, the 03 layer 32 groove, the 04 layer 25 groove, and the 04 layer 32 groove, then are welded to the 2 nd coil inner ring 300B at the 01 layer 38 groove, sequentially pass through the 01 layer 43 groove, the 02 layer 38 groove, the 02 layer 43 groove, the 03 layer 38 groove, the 03 layer 43 groove, and the lead terminal (lead terminal) of the 3 groove.
The U2 phase lead terminals (lead terminals) enter from the 01 layer 02 groove of the 1 st coil inner ring 150B, sequentially pass through the 01 layer 07 groove, the 02 layer 02 groove, the 02 layer 07 groove, the 03 layer 02 groove, the 03 layer 07 groove, the 04 layer 02 groove, and the 04 layer 07 groove, then are welded to the 2 nd coil outer ring 300A at the 01 layer 13 groove, sequentially pass through the 01 layer 20 groove, the 02 layer 13 groove, the 02 layer 20 groove, the 03 layer 13 groove, the 03 layer 20 groove, the 04 layer 13 groove, and the 04 layer 20 groove, then are welded to the 1 st coil inner ring 150B at the 01 layer 26 groove, sequentially pass through the 01 layer 31 groove, the 02 layer 26 groove, the 02 layer 31 groove, the 03 layer 26 groove, the 03 layer 31 groove, the 04 layer 26 groove, and the 04 layer 31 groove, then are welded to the 2 nd coil outer ring 300A at the 01 layer 37 groove, sequentially pass through the 01 layer 44 groove, the 02 layer 37 groove, the 02 layer 44 groove, the 03 layer 37 groove, the 03 layer 44 groove, the 04 layer 37 groove, and the U4 phase lead terminals.
The motor provided by the embodiment of the present invention includes the motor stator in the above embodiment, and therefore, the motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not described herein again.
Due to the structure:
1. by adopting the structure of winding the single-layer conductors on the same layer, the voltage difference of the conductors in the same groove can be effectively uniformly distributed, and the voltage difference of the conductors with different layers in the same groove can be reduced, so that the electric field intensity is reduced, the corona generation is reduced, the corrosion to insulation is reduced, and the insulation life is prolonged.
2. Effectively reduce the insulating layer size, can increase the same area in the groove simultaneously, improve the full rate in groove of motor, improve the wholeness ability of motor.
3. And the structure adopts a structure of winding a single-layer conductor on the same layer, welding spots are concentrated on one side, and the number of the welding spots can be greatly reduced.
4. The coil types are few, and only two concentric coils are provided.
By adopting the technical scheme, the electric field intensity between conductors in the slot is reduced, corona generation is reduced, further corrosion to insulation is reduced, the insulation life is prolonged, the size of an insulation layer is effectively reduced, the slot filling rate of the motor is improved, the axial end part height of the stator winding is reduced, the overall performance of the motor is improved, and the motor miniaturization is realized.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be mechanical or electrical, may be direct, may be indirect via an intermediate medium (a bridge wire connection), or may be a communication between two elements. Those skilled in the art will understand what is specifically meant by the present invention. Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, and that various obvious changes, rearrangements and substitutions may be made therein by those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A wound electric machine stator comprising:
a stator core having a plurality of core slots, a plurality of open core slots being formed on a radially inner surface of the stator core and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;
a stator winding including a plurality of phase windings mounted on the stator core,
the method is characterized in that:
the coils correspondingly arranged on each phase of winding comprise a 1 st coil and a 2 nd coil, the 1 st coil and the 2 nd coil respectively comprise an outer ring and an inner ring, the outer ring and the inner ring are both arranged in the slots of the iron core slots of the stator in a single-layer conductor same-layer winding mode and are sequentially stacked along the radial direction of the stator iron core, and the two slots of each outer ring are arranged on the circumferentially adjacent outer sides of the two slots of the inner ring of the corresponding coil;
the winding directions of the outer ring and the inner ring in the same coil are the same, and the winding directions of the 1 st coil and the 2 nd coil are the same.
2. The wound motor stator according to claim 1, wherein each of the outer and inner coils of the 1 st coil includes a pair of axial portions extending in the axial direction of the stator core, the pair of axial portions being connected to each other in the circumferential direction after the coil end portion outside the stator core is bent, and the bending directions of adjacent two 1 st coil conductors are opposite.
3. The wound motor stator according to claim 1, wherein each of the outer and inner coils of the 2 nd coil includes a pair of axial portions extending in the axial direction of the stator core, the pair of axial portions are folded back at coil end portions outside the stator core toward the axial end faces of the stator core to form a pair of folded-back portions, the pair of folded-back portion end portions are connected to each other in the circumferential direction after being folded, the folded-back portions of the 2 nd coil outer and inner coils are identical in direction and height, and the inner and outer coils in the same coil circumferentially cross over the inner coil, and the folding directions of adjacent two 2 nd coil conductors are opposite.
4. The wound motor stator according to claim 3, wherein a height of an end portion in the axial direction of the phase winding is a sum of a height of a folded portion of the 2 nd coil, and a conductor width of an outer ring and an inner ring of the 1 st coil at the end portion of the coil, when viewed from the axial direction of the stator core.
5. The wound motor stator according to any one of claims 1 to 4, wherein each phase winding is connected in such a manner that an outer ring and an inner ring of one of the 1 st coil or the 2 nd coil are integrated and then connected to the other coil in the circumferential direction.
6. The wound motor stator according to claim 5, wherein each phase winding includes a plurality of 1 st and 2 nd coils uniformly arranged, wherein the 1 st and 2 nd coils are arranged at intervals, and each phase winding is a branch series structure having a 1 st coil inner ring, a 1 st coil outer ring, a 2 nd coil inner ring, a 2 nd coil outer ring, a 1 st coil inner ring, a 1 st coil outer ring, a 2 nd coil inner ring, and a 2 nd coil outer ring sequentially connected in series along a circumferential direction.
7. The wound motor stator according to any one of claims 1 to 4, comprising a plurality of 1 st and 2 nd coils arranged uniformly, wherein the 1 st and 2 nd coils are arranged at intervals, and each phase winding is in a two-branch parallel structure;
the first branch is sequentially connected in series along the circumferential direction and has a structure comprising a 1 st coil outer ring, a 2 nd coil inner ring, a 1 st coil outer ring and a 2 nd coil inner ring;
the second branch circuit is sequentially connected in series along the circumferential direction and has a structure comprising a 1 st coil inner ring, a 2 nd coil outer ring, a 1 st coil inner ring and a 2 nd coil outer ring.
8. An electrical machine comprising a wound electrical machine stator according to any one of claims 1 to 7.
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| CN202111235431.2A CN113708521B (en) | 2021-10-22 | 2021-10-22 | Wound motor stator and motor |
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| CN202111235431.2A CN113708521B (en) | 2021-10-22 | 2021-10-22 | Wound motor stator and motor |
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| CN113708521B CN113708521B (en) | 2022-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037237A1 (en) * | 2022-08-19 | 2024-02-22 | 安徽威灵汽车部件有限公司 | Stator, motor, and vehicle |
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| JP2011188724A (en) * | 2010-03-11 | 2011-09-22 | Toyota Industries Corp | Stator for rotary electric machine, and method for manufacturing coil of the same |
| JP2015019452A (en) * | 2013-07-09 | 2015-01-29 | アイシン・エィ・ダブリュ株式会社 | Coil and coil formation method |
| JP2018183020A (en) * | 2017-04-21 | 2018-11-15 | ダイキン工業株式会社 | Rotary electric machine |
| JP2019134574A (en) * | 2018-01-31 | 2019-08-08 | アイシン・エィ・ダブリュ株式会社 | Stator manufacturing method, conductor welding method, stator manufacturing apparatus, and conductor welding apparatus |
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| JPH09215238A (en) * | 1996-01-30 | 1997-08-15 | Hitachi Ltd | Rotating machine and its forming method |
| JP2011188724A (en) * | 2010-03-11 | 2011-09-22 | Toyota Industries Corp | Stator for rotary electric machine, and method for manufacturing coil of the same |
| JP2015019452A (en) * | 2013-07-09 | 2015-01-29 | アイシン・エィ・ダブリュ株式会社 | Coil and coil formation method |
| JP2018183020A (en) * | 2017-04-21 | 2018-11-15 | ダイキン工業株式会社 | Rotary electric machine |
| JP2019134574A (en) * | 2018-01-31 | 2019-08-08 | アイシン・エィ・ダブリュ株式会社 | Stator manufacturing method, conductor welding method, stator manufacturing apparatus, and conductor welding apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024037237A1 (en) * | 2022-08-19 | 2024-02-22 | 安徽威灵汽车部件有限公司 | Stator, motor, and vehicle |
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|---|---|
| CN113708521B (en) | 2022-01-07 |
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