CN116404786A - Winding structure of flat wire motor stator - Google Patents

Winding structure of flat wire motor stator Download PDF

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Publication number
CN116404786A
CN116404786A CN202310242146.6A CN202310242146A CN116404786A CN 116404786 A CN116404786 A CN 116404786A CN 202310242146 A CN202310242146 A CN 202310242146A CN 116404786 A CN116404786 A CN 116404786A
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CN
China
Prior art keywords
layer
hairpin
flat wire
span
phase winding
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Pending
Application number
CN202310242146.6A
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Chinese (zh)
Inventor
申启乡
黄健
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Hefei JEE Power System Co Ltd
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Hefei JEE Power System Co Ltd
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Priority to CN202310242146.6A priority Critical patent/CN116404786A/en
Publication of CN116404786A publication Critical patent/CN116404786A/en
Pending legal-status Critical Current

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/06—Embedding prefabricated windings in machines
    • H02K15/062—Windings in slots; salient pole 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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

Abstract

The invention provides a winding structure of a flat wire motor stator, which belongs to the technical field of flat wire motors and comprises a stator core and a three-phase winding; the inner surface of the stator core is provided with a plurality of stator slots, and the three-phase winding is arranged in the stator slots; the three-phase winding is provided with 2n layers, n is more than or equal to 3, and n is a natural number; the first layer and the 2n layer of the three-phase winding are provided with a plurality of anti-twist hair cards with the span of 9 or with the span of 11 and the span of 8 alternately arranged. The single-phase winding adopts a three-way parallel connection mode, an outer layer wire outlet mode and a secondary outer layer wire outlet mode are used in arrangement and installation, and the leading-out end and the neutral end are very concentrated, so that the installation and wiring of the flat wire motor with 6 layers of 54 stator slots are facilitated; the anti-twisting hairpin of the first layer and the last layer is installed by adopting the span 9, and the U-shaped hairpin of the middle layer is installed by adopting a mode of combining two spans 8 and 11, so that the flat wire motor of the 54-slot 6 layer can replace the bridging of the special-shaped wire, and the wire outlet end structure is simplified.

Description

Winding structure of flat wire motor stator
Technical Field
The invention belongs to the technical field of flat wire motors, and particularly relates to a winding structure of a flat wire motor stator.
Background
The driving motor for the automobile is used as one of key execution parts of the electric automobile, and the performance of the driving motor for the automobile is crucial to the performance of the whole automobile. At present, the motor is developed towards high speed, light weight and high efficiency, and the flat wire winding has higher slot filling rate, higher power density and better heat dissipation capability than the conventional scattered wire winding group, so the flat wire winding is gradually used in the field of driving motors for vehicles
The current commutation of a certain phase branch of the existing 6-layer 54-stator slot flat wire stator winding is mostly implemented by using a special-shaped wire mode, and the special-shaped wire is mostly arranged at the end part of the stator winding; the three-phase outgoing lines and the neutral point outgoing lines are more dispersed.
Disclosure of Invention
In view of the above problems, the present invention provides a winding structure of a flat wire motor stator.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a winding structure of a flat wire motor stator comprises a stator core and a three-phase winding;
the inner surface of the stator core is provided with a plurality of stator slots, and the three-phase winding is arranged in the stator slots;
the three-phase winding is provided with 2n layers, n is more than or equal to 3, and n is a natural number;
the first layer and the 2n layer of the three-phase winding are provided with a plurality of anti-twisting hair cards with the span of 9 or with the span of 11 and the span of 8 alternately arranged;
the second layer to the 2n-1 layer of the three-phase winding are provided with a plurality of U-shaped hairpin with 8 spans and 11 spans;
the three-phase winding is also provided with a leading-out end and a neutral end;
the neutral end is positioned at the inner side of the leading-out end.
Preferably, the stator slots are provided with 54 stator slots.
Preferably, the anti-twisting hairpin comprises an outgoing line hairpin, a first reversing hairpin and a second reversing hairpin, which are used for reversing connection;
the outgoing line hairpin and the plurality of first reversing hairpin are uniformly arranged on the first layer of the three-phase winding in a structure of alternately arranging a span 9 or a span 11 and a span 8;
one end of the outgoing line hairpin is used for forming an outgoing end;
a plurality of second commutation clips are arranged on the 2n layer of the three-phase winding in a structure of alternately arranging the spans 9 or 11 and 8.
Preferably, the outgoing line hairpin, the first reversing hairpin and the second reversing hairpin are all composed of a U-shaped conductor and a connecting end which is arranged at an opening of the U-shaped conductor and is arranged in the same direction;
the lengths of the connecting ends of the outgoing line hair clips are different;
the connecting ends of the first reversing hairpin and the second reversing hairpin face opposite directions.
Preferably, the U-shaped hairpin includes a cross-layer hairpin and a neutral wire hairpin;
the cross-layer hairpin and the neutral line hairpin are both used for cross-layer connection;
and one end of the neutral line hairpin is positioned on the second layer and used for forming a neutral end.
Preferably, the cross-layer hairpin and the neutral wire hairpin are both composed of a U-shaped conductor and a connecting end which is connected with the opening of the U-shaped conductor and is arranged away from the opening;
the lengths of the connecting ends of the cross-layer hairpin are equal;
the lengths of the connecting ends of the neutral line hairpin are different.
Preferably, each of the three phase windings is provided with three parallel branches.
Preferably, the sum of the numbers of the outgoing line card-issuing and the first reversing card-issuing is equal to the number of the second reversing card-issuing.
Preferably, the stator core is cylindrical and is formed by laminating a plurality of silicon steel sheets.
Preferably, insulating paper is arranged in the stator groove.
The invention has the beneficial effects that:
1. the invention provides a flat wire stator winding scheme, a three-way parallel connection mode is adopted for a single-phase winding, an outer layer wire outlet mode and a secondary outer layer wire outlet mode are adopted in arrangement and installation, and a leading-out end and a neutral end are very concentrated, so that the installation and wiring of a 6-layer 54-stator-slot flat wire motor are facilitated;
2. the anti-twisting hairpin of the first layer and the last layer is installed by adopting the span 9, and the U-shaped hairpin of the middle layer is installed by adopting a mode of combining two spans 8 and 11, so that the flat wire motor of the 54-slot 6 layer can replace the bridging of the special-shaped wire, the wire outlet end structure is simplified, and the connection reliability is improved;
3. the anti-twisting hair clasp of the first layer and the last layer of the invention adopts the alternate installation of the span 8 and the span 11, provides a novel winding structure for the flat wire motor with 6 layers of 54 slots, ensures that the leading-out ends and the neutral ends can be arranged according to the arrangement of the spans 8 and 11, is concentrated and compact, is beneficial to outgoing wires and is reliable in connection.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of a winding structure of a flat wire motor stator of the present invention;
FIG. 2 shows a schematic diagram of the structure of the pinout card of the present invention;
FIG. 3 shows a schematic diagram of a first reversing hairpin of the invention;
FIG. 4 shows a schematic diagram of the structure of a cross-layer issuer of the present invention;
fig. 5 shows a schematic diagram of a second reversing hairpin structure of the invention;
FIG. 6 shows a schematic diagram of a neutral conductor hairpin structure of the invention;
fig. 7 shows a schematic diagram of a single-phase winding structure of the present invention;
FIG. 8 is a schematic diagram of a first layer card issuing installation of the present invention;
FIG. 9 is a schematic diagram of a second and third tier of hair clip installation of the present invention;
FIG. 10 is a schematic diagram of a fourth and fifth tier card issuing installation of the present invention;
FIG. 11 is a schematic diagram of a sixth level hairpin installation of the invention;
fig. 12 shows a single-phase winding development of the invention.
In the figure: 1. a stator core; 101. a stator groove; 2. a lead-out end; 3. a neutral end; 4. a welding end; 5. a card issuing end; 6. issuing a card by the outgoing line; 7. a first reversing hairpin; 8. cross-layer hairpin; 9. the second reversing hairpin; 10. the neutral line is stuck.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The winding structure of a flat wire motor stator, as shown in figure 1, comprises a stator core 1 and a three-phase winding; wherein, the inner surface of the stator core 1 is provided with a plurality of stator slots 101, and three-phase windings are arranged in the stator slots 101; in addition, the three-phase winding is provided with 2n layers, n is more than or equal to 3, and n is a natural number; the first layer and the 2n layer of the three-phase winding are provided with a plurality of anti-twist hair cards with the span of 9 or the span of 11 and the span of 8 alternately arranged; the second layer to the 2n-1 layer of the three-phase winding are provided with a plurality of U-shaped hairpin with 8 spans and 11 spans; the three-phase winding is also provided with a leading-out end 2 and a neutral end 3; the neutral end 3 is located inside the outlet end 2.
In fig. 2, 54 stator slots 101 are provided in number, and a circumferential array is formed on the stator core 1, and in consideration of insulation, insulation paper of a certain length and thickness is inserted into each stator slot 101, the stator core 1 is cylindrical, and is formed by laminating a plurality of silicon steel sheets, and the stator core 1 is formed by laminating a certain number of silicon steel sheets, and may be in various manners such as riveting, welding or bonding. Flat copper conductors are inserted into 54 stator slots 101, and 2n conductors (n is a natural number) are inserted into each slot. In order to realize the electrical connection between the conductors in the 54 rectangular grooves, a manner of sending a card, welding and the like is needed. Assuming that 2n conductors can be inserted per slot, there are 2n layers of conductors per slot, and it is stated that the outer layer is near the bottom of the stator slot 101 and the inner layer is near the mouth of the stator slot 101. The corresponding in-slot conductors under each branch are circularly arranged in the stator slots 101 of the span rule according to the adjacent layers.
It should be noted that, three-phase winding sets up altogether and is provided with 6 layers, and wherein the anti-hair of turning round of the leading-out end 2 department of first layer connects U-shaped hair clip, then the U-shaped hair clip begins the cross-layer connection from the second floor, and the anti-hair clip of turning round of layer 6 is connected, then the anti-hair clip of turning round of reversing back first layer again, and the circulation so far as connecting neutral end 3. In addition, the three-phase winding components are U-phase, V-phase and W-phase, and each phase winding is arranged in a mode of connecting three branches in parallel.
In the present invention, the bottom of the stator slot 101 is the first layer, and the opening of the stator slot 101 is the 2n layer, but the reverse may be also adopted.
Further, the anti-twisting hairpin comprises an outgoing line hairpin 6, a first reversing hairpin 7 and a second reversing hairpin 9 which are used for reversing connection; the outgoing line hairpin 6 and the first reversing hairpin 7 are uniformly arranged on the first layer of the three-phase winding in a structure of alternately arranging a span 9 or a span 11 and a span 8; one end of the outgoing line hairpin 6 is used for forming an outgoing end 2; a plurality of second commutating hairpins 9 are mounted on the 2 n-th layer of the three-phase winding in a structure in which spans 9, or spans 11 and spans 8 are alternately arranged.
Further, as shown in fig. 2, 3 and 5, the outgoing line hairpin 6, the first reversing hairpin 7 and the second reversing hairpin 9 are all composed of a U-shaped conductor and connecting ends which are arranged at openings of the U-shaped conductor and are arranged in the same direction; in fig. 2, the connection ends of the outgoing line hairpin 6 are unequal in length, wherein the connection end with the longer length constitutes the lead end 2, and the end with the shorter length is connected with the U-shaped hairpin. The connection end of the first reversing hairpin 7 is opposite to the connection end of the second reversing hairpin 9, in fig. 3, the connection end of the first reversing hairpin 7 is arranged towards the right for connecting the second layer of U-shaped hairpin, and in fig. 5, the connection end of the second reversing hairpin 9 is arranged towards the left for connecting the fifth layer of U-shaped hairpin.
Further, the U-shaped hairpin comprises a cross-layer hairpin 8 and a neutral wire hairpin 10; the cross-layer hairpin 8 and the neutral line hairpin 10 are both used for cross-layer connection, and if one end of the cross-layer hairpin 8 is positioned at the 2n-2 th layer, the other end is positioned at the 2n-3 rd layer or the 2n-1 st layer, so that cross-layer is realized; while the neutral conductor hairpin 10 is used for cross-layer connection between the first layer and the second layer.
Further, as shown in fig. 4 and 6, the cross-layer hairpin 8 and the neutral line hairpin 10 are both composed of a U-shaped conductor and a connecting end which is connected with the opening of the U-shaped conductor and is arranged away from the opening; in fig. 4, the connection ends of the cross-layer hairpin 8 are equal in length for connection with the anti-twist hairpin, other cross-layer hairpin 8, and the neutral line hairpin 10. As shown in fig. 6, the lengths of the connection ends of the neutral line hairpin 10 are different, wherein the connection end with a longer length is used for forming the neutral end 3, and the connection end with a shorter length is welded with the connection end of the cross-layer hairpin 8.
The winding coil includes a U-shaped conductor inserted into the stator slot 101, the connection end of the other end may be formed into a welding end 4 by twisting and expanding, and the closed end of the U-shaped conductor forms a hairpin end 5.
Further, the sum of the numbers of the outgoing line card-issuing 6 and the first reversing card-issuing 7 is equal to the number of the second reversing card-issuing 9.
An embodiment of the three-phase winding structure of the 54 stator slots 101 of the 6 layers of the present invention, in which the first layer and the sixth layer each adopt a structure of a span 9, will be described with reference to fig. 8 to 11, specifically as follows:
as shown in fig. 8, a first layer of anti-twisting hairpin installation schematic diagram is shown, wherein a total of 9 outgoing line hairpin 6 are grouped by 3 outgoing line hairpin 6 connected in parallel to form an outgoing end 2 of a single-phase winding, then 18 first commutation hairpin 7 are arranged, each single-phase winding corresponds to 6, and the single-phase winding is installed in a stator slot 101 by a span 9.
As shown in fig. 9, a U-shaped card-issuing installation schematic of the second layer and the third layer is shown, wherein the cross-layer card-issuing 8 is connected from the second layer to the third layer in a manner of span 8+span 11+span 8, and the total number is 54, and 27 is shown in each layer.
As shown in fig. 10, a schematic diagram of the installation of the U-shaped hairpin of the fourth layer and the fifth layer is shown, wherein the cross-layer hairpin 8 is connected from the fourth layer to the fifth layer in a manner of span 8+span 11+span 8, and the total number is 54, and 27 is shown in each layer.
As shown in fig. 11, the second reversing clips 9 of the sixth layer are 27 in number and are installed in the span 9.
Another embodiment of the three-phase winding structure of the present invention of the 6-layer 54 stator slots 101 is: the first layer and the sixth layer adopt a mode of combining the span 11 and the span 8, the number of the outgoing line hairpin 6, the first reversing hairpin 7 and the second reversing hairpin 9 is not changed, and the structures of fig. 9 and 10 are installed in the same way from the second layer to the fifth layer.
The three-phase winding of the invention takes the outgoing line hairpin 6 of the first layer as a starting point, is connected to the last layer from the first layer, is connected to the first layer from the last layer in a reversing way, and is connected to the first layer and the sixth layer in a reversing way, so that the three-phase winding is reciprocated until the last neutral line hairpin 10 is positioned at the inner side of the outgoing line hairpin 6, and the three-phase winding is concretely as follows: the outgoing line hairpin 6 is connected with two sequentially connected cross-layer hairpin 8, from the second layer to the third layer, from the fourth layer to the fifth layer, the cross-layer hairpin 8 of the fifth layer is connected with the second reversing hairpin 9 of the sixth layer to realize reversing, then the outgoing line hairpin 8 is reversely connected to the first reversing hairpin 7, … … of the first layer, and the outgoing line hairpin 6 is circularly connected in the mode, and finally the neutral line hairpin 10 is connected, so that one end of the neutral line hairpin 10 is positioned on the second layer and positioned on the inner side of the outgoing line hairpin 6.
As shown in fig. 12, which is an expanded view of the single-phase winding, reference numerals 1 to 54 in the drawing indicate 54 stator slots 101, a1+, a2+, a3+ are the leading-out terminals 2 of the single-phase winding, and A1-, A2-, and A3-are the neutral terminals 3 of the single-phase winding.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The winding structure of the flat wire motor stator is characterized by comprising a stator core (1) and a three-phase winding;
the stator core (1) is provided with a plurality of stator slots (101) on the inner surface, and the three-phase windings are arranged in the stator slots (101);
the three-phase winding is provided with 2n layers, n is more than or equal to 3, and n is a natural number;
the first layer and the 2n layer of the three-phase winding are provided with a plurality of anti-twisting hair cards with the span of 9 or with the span of 11 and the span of 8 alternately arranged;
the second layer to the 2n-1 layer of the three-phase winding are provided with a plurality of U-shaped hairpin with 8 spans and 11 spans;
the three-phase winding is also provided with a leading-out end (2) and a neutral end (3);
the neutral end (3) is positioned at the inner side of the leading-out end (2).
2. A winding structure of a flat wire motor stator according to claim 1, characterized in that the stator slots (101) are provided with 54.
3. The winding structure of a flat wire motor stator according to claim 1, wherein the anti-twist hair clip comprises a lead-out hair clip (6), a first commutation hair clip (7) and a second commutation hair clip (9) for commutation connection;
the outgoing line hairpins (6) and the first reversing hairpins (7) are uniformly arranged on the first layer of the three-phase winding in a structure of alternately arranging a span 9 or a span 11 and a span 8;
one end of the outgoing line hairpin (6) is used for forming an outgoing end (2);
and a plurality of second reversing hairpins (9) are arranged on the 2n layer of the three-phase winding in a structure of alternately arranging the spans 9 or the spans 11 and the spans 8.
4. A winding structure of a flat wire motor stator according to claim 3, characterized in that the outgoing line hairpin (6), the first commutation hairpin (7) and the second commutation hairpin (9) are each composed of a U-shaped conductor and a connecting end arranged at the opening of the U-shaped conductor and arranged in the same direction;
the lengths of the connecting ends of the outgoing line hair clips (6) are different;
the connecting end of the first reversing hairpin (7) and the connecting end of the second reversing hairpin (9) face opposite directions.
5. A winding structure of a flat wire motor stator according to claim 3, characterized in that the U-shaped hairpin comprises a cross-layer hairpin (8) and a neutral wire hairpin (10);
the cross-layer hairpin (8) and the neutral wire hairpin (10) are both used for cross-layer connection;
one end of the neutral wire hairpin (10) is positioned on the second layer and used for forming a neutral end (3).
6. A winding structure of a flat wire motor stator according to claim 5, characterized in that the cross-layer hairpins (8) and the neutral wire hairpins (10) are each composed of a U-shaped conductor and a connecting end which is connected with the opening of the U-shaped conductor and is arranged away from the U-shaped conductor;
the lengths of the connecting ends of the cross-layer hairpins (8) are equal;
the lengths of the connecting ends of the neutral line hairpins (10) are different.
7. The winding structure of a flat wire motor stator according to claim 1, wherein each of the single-phase windings of the three-phase windings is provided with three parallel branches.
8. A winding structure of a flat wire motor stator according to claim 3, characterized in that the sum of the number of outgoing line clips (6) and the number of first commutation clips (7) is equal to the number of second commutation clips (9).
9. The winding structure of a flat wire motor stator according to claim 1, wherein the stator core (1) is cylindrical and is formed by laminating a plurality of silicon steel sheets.
10. A winding structure of a flat wire motor stator according to any one of claims 1-9, characterized in that insulation paper is provided in the stator slots (101).
CN202310242146.6A 2023-03-09 2023-03-09 Winding structure of flat wire motor stator Pending CN116404786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310242146.6A CN116404786A (en) 2023-03-09 2023-03-09 Winding structure of flat wire motor stator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310242146.6A CN116404786A (en) 2023-03-09 2023-03-09 Winding structure of flat wire motor stator

Publications (1)

Publication Number Publication Date
CN116404786A true CN116404786A (en) 2023-07-07

Family

ID=87009397

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310242146.6A Pending CN116404786A (en) 2023-03-09 2023-03-09 Winding structure of flat wire motor stator

Country Status (1)

Country Link
CN (1) CN116404786A (en)

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