CN219592180U

CN219592180U - Winding structure of short-distance flat wire motor stator

Info

Publication number: CN219592180U
Application number: CN202320481702.0U
Authority: CN
Inventors: 刘蕾; 黄健; 程勇; 陈再好; 钱双球
Original assignee: Hefei JEE Power System Co Ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-08-25
Anticipated expiration: 2033-03-09

Abstract

The utility model belongs to the technical field of flat wire motors, and provides a winding structure of a short-distance flat wire motor stator, which comprises a three-phase winding, a three-phase copper bar, a neutral bar, a U-shaped conductor and a stator core; the stator core is provided with a stator slot, the three-phase winding is composed of a plurality of hairpin coils which are connected in parallel, and the three-phase winding is arranged in the stator slot in a fixed span and is provided with a plurality of layers. According to the utility model, the span 10 is adopted in the winding structure of 54 stator slots, and the U-shaped conductors are adopted for connection, so that the neutral end and the leading-out end are concentrated on the innermost layer and the outermost layer of the winding structure, and a reverse twisting card is not used, so that the installation difficulty of the winding structure is simplified; the utility model can quickly confirm the span of the U-shaped conductor by adopting the digital graduations when the U-shaped conductor is installed, thereby avoiding the situation of using U-shaped conductors with different spans.

Description

Winding structure of short-distance flat wire motor stator

Technical Field

The utility model belongs to the technical field of flat wire motors, and particularly relates to a winding structure of a short-distance flat wire motor stator.

Background

The new energy driving motor is used as one of key execution components of the electric automobile, the performance of the new energy driving motor is critical to the performance of the whole automobile, the automobile motor is developed towards high speed, light weight and high efficiency, and the power density, the efficiency, the noise and the like of the motor are required to be higher.

The conventional flat wire motor is generally a 48-slot or 54-slot structure with a full pitch, wherein the span adopted in the 48-slot structure is generally 5+7 or is installed by adopting a span 6, the span can be divided by the number of stator slots, the conventional flat wire motor is a winding structure with a full pitch, and if the number of spans cannot be divided by the number of stator slots, the conventional flat wire motor is a winding structure with a short pitch.

In order to improve the diversity of the motor to adapt to different project demands, the winding structure of the short-distance 54-slot flat wire stator also has application prospect, however, in the winding structure of 54 at present, if the design of a span and a winding structure is improper, the condition that a leading-out end and a neutral end are not concentrated easily occurs, the installation wiring is not facilitated, in addition, the winding structure of the current flat wire motor adopts a reverse twisting card to carry out reversing connection, the number of stator slots is increased, the number of the used reverse twisting cards is increased correspondingly, the installation difficulty of the winding structure is increased, and in order to improve the vibration noise of the motor, the number of each slot of each pole of the motor is increased as much as possible, and meanwhile, the branch number of the winding is also required to be increased to match with better motor output performance. Accordingly, there is a need for a flat copper wire motor that can effectively improve motor output performance.

Disclosure of Invention

In order to solve the problems, the utility model provides a winding structure of a short-distance flat wire motor stator.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a winding structure of a short-distance flat wire motor stator comprises a three-phase winding, a three-phase copper bar, a neutral bar 5, a U-shaped conductor and a stator core;

the stator core is provided with a stator slot, the pole pair number is k, k is more than or equal to 3, and k is an odd number;

the three-phase winding is composed of a plurality of hairpin coils which are connected in parallel, and is arranged in a stator slot in a fixed span, and a plurality of layers are arranged;

the hairpin coil is formed by sequentially connecting a plurality of U-shaped conductors;

the three-phase copper bar is connected with one end of the hairpin coil, and the neutral bar 5 is connected with the other end of the hairpin coil.

Preferably, the fixed span is 10.

Preferably, two of the hairpin coils arranged in parallel constitute a single-phase winding of the three-phase windings.

Preferably, the U-shaped conductor comprises a connection conductor;

the connecting conductor 7 comprises a first U-shaped rod and two connecting rods with equal length;

the connecting rods with equal lengths face opposite directions and are connected with the opening ends of the first U-shaped rods.

Preferably, the U-shaped conductor further comprises a lead-out conductor;

the lead-out conductor comprises a second U-shaped rod and two connecting rods with unequal lengths;

the connecting rods with unequal lengths face opposite directions and are connected with the opening ends of the second U-shaped rods.

Preferably, the three-phase copper bar comprises a U-phase copper bar, and the U-phase copper bar is arc-shaped;

the inner cambered surface and the outer cambered surface of the U-phase copper bar are connected with a first extraction rod;

one end of the U-phase copper bar is connected with a first lead-out copper bar.

Preferably, the three-phase copper bar comprises a V-phase copper bar, and the V-phase copper bar is arc-shaped;

the inner cambered surface and the outer cambered surface of the V-phase copper bar are connected with a second extraction rod;

one end of the V-phase copper bar is connected with a second lead-out copper bar.

Preferably, the three-phase copper bar comprises a W-phase copper bar, and the W-phase copper bar is arc-shaped;

the inner cambered surface and the outer cambered surface of the W-phase copper bar are connected with a third extraction rod;

one end of the W-phase copper bar is connected with a third lead-out copper bar.

Preferably, the neutral row is arc-shaped, and the inner cambered surface and the outer cambered surface are connected with a plurality of neutral rods.

Preferably, insulating paper is also inserted into the stator groove; the surface of the stator core is provided with digital scales, and the digital scales are in one-to-one correspondence with the stator slots; the digital scale is used to calculate the span for installing the U-shaped conductor.

The utility model has the beneficial effects that:

1. according to the utility model, the span 10 is adopted in the winding structure of 54 stator slots, and the U-shaped conductors are adopted for connection, so that the neutral end and the leading-out end are concentrated on the innermost layer and the outermost layer of the winding structure, and a reverse twisting card is not used, so that the installation difficulty of the winding structure is simplified;

2. according to the utility model, by adopting the digital scales, the span of the U-shaped conductor can be rapidly confirmed when the U-shaped conductor is installed, so that the situation of using U-shaped conductors with different spans is avoided;

3. the hairpin coil is installed by using a structure that a plurality of U-shaped conductors are sequentially connected, reversing connection is not needed, an arrangement mode that the leading-out end and the neutral end are uniformly distributed at two ends of the three-phase copper bars and the neutral bar is realized, and lead copper bars are concentrated together, so that the hairpin coil is more convenient to wire with external equipment.

Additional features and advantages of the utility model 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 utility model. The objectives and other advantages of the utility model 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 utility model 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 utility model, 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 structural view of a winding structure of a short-distance flat wire motor stator of the present utility model;

FIG. 2 shows a block diagram of a connection conductor of the present utility model;

FIG. 3 shows a block diagram of the lead-out conductor of the present utility model;

FIG. 4 shows a block diagram of a U-phase copper bar of the present utility model;

FIG. 5 shows a block diagram of a V-phase copper bar of the present utility model;

FIG. 6 shows a block diagram of a W-phase copper bar of the present utility model;

FIG. 7 shows a block diagram of a neutral row of the present utility model;

FIG. 8 shows a connection diagram of a three-phase copper bar and a lead-out conductor of the present utility model;

FIG. 9 shows a connection diagram of a neutral row and a lead conductor of the present utility model;

FIG. 10 shows a connection structure of the hairpin of the utility model;

FIG. 11 shows a three-phase expanded view of a 6-layer 54-slot winding structure of the present utility model;

fig. 12 shows a single-phase development of the 6-layer 54-slot winding structure of the present utility model.

In the figure: 1. a stator core; 101. a stator groove; 2. insulating paper; 3. a card issuing end; 4. a welding end; 5. a neutral row; 501. a neutral lever; 6. a digital scale; 7. a connection conductor; 8. a lead conductor; 9. u-phase copper bars; 901. a first extraction lever; 902. a first lead-out copper bar; 10. v-phase copper bars; 1001. a second extraction rod; 1002. a second lead-out copper bar; 11. w-phase copper bars; 1101. a third extraction lever; 1102. and thirdly, leading out copper bars.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The winding structure of a short-distance flat wire motor stator, as shown in figure 1, comprises a three-phase winding, a three-phase copper bar, a neutral bar 5, a U-shaped conductor and a stator core 1; the stator core 1 is provided with 54 stator slots 101, the pole pair number is k, k is greater than or equal to 3, and k is odd, the stator core 1 in the figure is generally formed by stacking silicon steel sheets, and in addition, in fig. 1, the stator core 1 is marked with reference numerals 1-54, and the reference numerals correspond to the 54 stator slots 101 respectively. Then the three-phase winding is composed of several hairpin coils and is installed in the stator slot 101 with a fixed span 10, a number of layers are provided, specifically the number of layers can be set to 2n, n is greater than or equal to 3, and in addition, insulating paper 2 is inserted into the stator slot 101.

In addition, the hairpin coil is formed by sequentially connecting a plurality of U-shaped conductors; and the three-phase copper bar is connected with one end of the hairpin coil, and the neutral bar 5 is connected with the other end of the hairpin coil. Each hairpin coil corresponds to a current branch, and two hairpin coils connected in parallel form a unidirectional winding in the three-phase winding. In the working state, the current enters from the three-phase copper bar, then enters into two parallel hairpin coils, and finally flows out from the neutral bar 5.

In addition, the surface of the stator core 1 is provided with 1-54 digital scales 6, the digital scales 6 are in one-to-one correspondence with the stator slots 101, and the digital scales 6 are used for calculating the span when installing the U-shaped conductors.

It should be noted that, the function of designing the digital scale 6 is to quickly determine how much span is when installing the U-shaped conductor, if the U-shaped conductor with other spans is used, the problem that the span is not in compliance can be found through the digital scale 6, so that convenience is improved.

As shown in fig. 2, the U-shaped conductor comprises a connecting conductor 7, the connecting conductor 7 comprising a first U-shaped bar and two connecting bars of equal length, and the connecting bars of equal length being opposite in orientation and connected to the open ends of the first U-shaped bar.

As shown in fig. 3, the U-shaped conductor further comprises a lead-out conductor 8, the lead-out conductor 8 comprising a second U-shaped bar and two connecting bars of unequal length, the connecting bars of unequal length facing opposite and being connected to the open ends of the second U-shaped bar.

In fig. 2 and 3, the U-shaped conductor has a flat copper structure, and the first U-shaped bar and the second U-shaped bar are inserted into the stator groove 101 as a main structure, and the span is 10. When the connection conductors 7 are connected to the lead conductors 8, one of the connection conductors 7 is soldered to a connection rod of shorter length of the lead conductors 8. The long connecting rod of the lead conductor 8 is connected to the three-phase copper bar.

It should be further noted that in the three-phase winding, the closed ends of the U-shaped conductors constitute the hairpin ends 3, while the open ends are welded together by the connecting rods, constituting the welded ends 4.

Further, as can be seen from fig. 1, fig. 2 and fig. 3, the hairpin coil is wound in two manners, that is, the hairpin coil is provided with a plurality of sequentially connected U-shaped conductors in a counterclockwise direction with a first layer as a starting point until the hairpin coil is wound in a circle on a last layer, or is provided with a plurality of sequentially connected U-shaped conductors in a clockwise direction with a last layer as a starting point until the hairpin coil is wound in a circle on the first layer.

In the hairpin, the first and last U-shaped conductors are the outgoing conductors 8, and then a plurality of connection conductors 7 are provided between the two outgoing conductors 8. When the hairpin coil is wound from the first layer to the last layer, the lead-out conductors 8 are connected with a plurality of connection conductors 7 by winding the connection conductors around the first layer, then bridging the connection conductors 7 from the first layer to the third layer, then winding the connection conductors 7 around the second layer and bridging the connection conductors to the 5 th layer, according to the rule, the connection conductors 7 are always connected to the last layer, and are arranged around the last layer, and the connection conductors 7 are replaced by the lead-out conductors 8 at the positions of winding the connection conductors around the first layer. Conversely, when the hairpin is wound from the 2n layer to the first layer, the lead-out conductors 8 are connected to the plurality of connection conductors 7 by winding the connection conductors 7 around the 2n layer one turn, then bridging the connection conductors 7 from the 2n layer to the 2n-2 layer, then winding the connection conductors 7 around the second layer one turn and bridging the connection conductors 7 to the 2n-4 layer, according to the rule, the connection conductors 7 are connected to the first layer all the way to the last layer, and are arranged around the last layer, and the connection conductors 7 are replaced by the lead-out conductors 8 at the positions where the connection conductors are wound around the one turn.

Further, as shown in fig. 4, the three-phase copper bar includes a U-phase copper bar 9,U phase copper bar 9 designed into an arc structure; the inner arc surface and the outer arc surface of the U-phase copper bar 9 are both connected with a first lead-out rod 901, and one end of the U-phase copper bar 9 is welded with (or integrally formed with) the first lead-out copper bar 902. The first lead-out rod 901 is respectively connected with the two hairpin coils, then the first lead-out copper bar 902 is used as a lead-out wire to be led into external current, and then the current respectively enters the two hairpin coils which are connected in parallel through the first lead-out rod 901.

Further, as shown in fig. 5, the three-phase copper bar includes a V-phase copper bar 10, and the V-phase copper bar 10 is designed to have an arc structure; the inner arc surface and the outer arc surface of the V-phase copper bar 10 are both connected with a second lead-out rod 1001, and one end of the V-phase copper bar 10 is welded with (or integrally formed with) the second lead-out copper bar 1002. Wherein the second lead-out bar 1001 is connected with two hairpin coils respectively, then the second lead-out copper bar 1002 is used as a lead-out wire to be led with external current, and then the current enters the two hairpin coils connected in parallel respectively through the second lead-out bar 1001.

Further, as shown in fig. 6, the three-phase copper bar includes a W-phase copper bar 11, and the W-phase copper bar 11 is arc-shaped; the inner cambered surface and the outer cambered surface of the W-phase copper bar 11 are connected with a third extraction rod 1101; one end of the W-phase copper bar 11 is connected to a third lead copper bar 1102. In addition, the function of the W-phase copper bar 11 is the same as that of the U-phase copper bar 9 and the V-phase copper bar 10, and will not be described here again.

Further, as shown in fig. 7, the neutral row 5 is arc-shaped, and both the intrados and extrados are connected with a plurality of neutral bars 501. The neutral bars 501 are connected to one end of the hairpin, specifically, welded to a long connecting rod of the lead conductor 8, and as shown in fig. 7, the neutral bars 501 are provided with 6 hairpin coils connected in parallel. As can be seen in connection with fig. 1 and 9, the neutral bars 5 are arranged in the three-phase windings on the underside of the three-phase copper bars.

As shown in fig. 8, the U-phase copper bar 9, the V-phase copper bar 10 and the W-phase copper bar 11 are mounted on the three-phase winding in a stacked manner, so that the positions of the outgoing lines are more concentrated, and connection with external equipment is facilitated.

The following describes a single-phase winding of a stator winding of a flat wire motor of 6 layers 54 slots and a span of 10 according to the present utility model:

as shown in fig. 10, when the lead-out conductor 8 of the 6 th layer is used as the current lead-in terminal, the 6 th layer is wound around the stator core 1 along the stator core through one lead-out conductor 8 and two connecting conductors 7, and the layer number is changed to 6 th layer, 5 th layer, 6 th layer and cross layer to 4 th layer; then 3 connection conductors 7 are wound around the stator core 1 for one turn, and the layer number is changed to be 4 th layer, 3 rd layer, 4 th layer and cross-layer to 2 nd layer; finally, a turn is wound around the stator core 1 by two connection conductors 7 and one extraction conductor 8, the number of layers of which varies from layer 2 to layer 1 to layer 2 to the longer connection end of the extraction conductor 8 (the connection end is located in the first layer and is welded with one neutral rod 501 of the neutral row 5 as the current outflow end).

Similarly, when the lead-out conductor 8 of the 1 st layer is taken as a current lead-in end, the 1 st layer is wound along the stator core 1 through one lead-out conductor 8 and two connecting conductors 7, and the layer number is changed into 1 st layer, 2 nd layer, 1 st layer and cross-layer to 3 rd layer; then 3 connection conductors 7 are wound around the stator core 1 for one turn, and the layer number is changed to be 3 layers, 4 layers, 3 layers and cross layers to 5 layers; finally, two connection conductors 7 and one lead-out conductor 8 are wound around the stator core 1 in a circle, the number of layers of the connection conductors is changed into 5 th layer, 6 th layer, 5 th layer, and the longer connection end of the lead-out conductor 8 (the connection end is positioned at the 6 th layer and is welded with one neutral rod 501 of the neutral row 5 and is used as a current outflow end).

As shown in FIG. 11, a three-phase winding development of a winding structure of 6 layers 54 slots is shown, wherein the numbers 1-54 represent 54 stator slots 101, wherein solid lines are U-phases A1+, A1-, A2+, A2-, dashed lines are V-phases B1+, B1-, B2+, B2-, and broken lines are W-phases C1+, C1-, C2+, C2-, and 6 outgoing lines are arranged at the neutral point, 3 innermost layers are A1+, B1+, C1+, and 3 outermost layers are A2-, B2-, and C2-, respectively.

As shown in fig. 12, which is a single-phase winding development of a 6-layer 54-slot winding structure, in a U-phase winding, a1+ and a1-represent one parallel branch, a2+ and a2-are the other parallel branch, wherein a1+ and a2+ are the innermost layers of the winding, A1-and A2-are the outermost layers of the U-phase winding, and the V-phase winding and the W-phase winding are the same.

Although the utility model 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 utility model.

Claims

1. The winding structure of the short-distance flat wire motor stator is characterized by comprising a three-phase winding, a three-phase copper bar, a neutral bar (5), a U-shaped conductor and a stator core (1);

the stator core (1) is provided with 54 stator slots (101), the pole pair number is k, k is more than or equal to 3, and k is an odd number;

the three-phase winding is composed of a plurality of hairpin coils which are connected in parallel, and is arranged in a stator slot (101) in a fixed span, and a plurality of layers are arranged;

the three-phase copper bar is connected with one end of the hairpin coil, and the neutral bar (5) is connected with the other end of the hairpin coil.

2. The winding structure of a short-distance flat wire motor stator according to claim 1, wherein the fixed span is 10.

3. A winding structure of a short-distance flat wire motor stator according to claim 1, wherein two of said hairpin coils arranged in parallel constitute a single-phase winding of said three-phase windings.

4. A winding structure of a short-range flat wire motor stator according to claim 1, characterized in that the U-shaped conductor comprises a connection conductor (7);

the connecting conductor (7) comprises a first U-shaped rod and two connecting rods with equal lengths;

5. A winding structure of a short-range flat wire motor stator according to claim 4, characterized in that the U-shaped conductor further comprises a lead-out conductor (8);

the lead-out conductor (8) comprises a second U-shaped rod and two connecting rods with unequal lengths;

6. The winding structure of a short-distance flat wire motor stator according to claim 1, wherein the three-phase copper bars comprise U-phase copper bars (9), and the U-phase copper bars (9) are arc-shaped;

the inner cambered surface and the outer cambered surface of the U-phase copper bar (9) are connected with a first extraction rod (901);

one end of the U-phase copper bar (9) is connected with a first lead-out copper bar (902).

7. A winding structure of a short-distance flat wire motor stator according to claim 1, characterized in that the three-phase copper bars comprise V-phase copper bars (10), the V-phase copper bars (10) being arc-shaped;

the inner cambered surface and the outer cambered surface of the V-phase copper bar (10) are connected with a second extraction rod (1001);

one end of the V-phase copper bar (10) is connected with a second lead-out copper bar (1002).

8. The winding structure of a short-distance flat wire motor stator according to claim 1, wherein the three-phase copper bar comprises a W-phase copper bar (11), and the W-phase copper bar (11) is arc-shaped;

the inner cambered surface and the outer cambered surface of the W-phase copper bar (11) are connected with a third extraction rod (1101);

one end of the W-phase copper bar (11) is connected with a third lead-out copper bar (1102).

9. The winding structure of a short-distance flat wire motor stator according to claim 1, wherein the neutral row (5) is arc-shaped, and both the intrados and extrados are connected with a plurality of neutral bars (501).

10. Winding structure of a short-distance flat wire motor stator according to any of claims 1-9, characterized in that the stator slot (101) is further inserted with insulating paper (2); the surface of the stator core (1) is provided with digital scales (6), and the digital scales (6) are in one-to-one correspondence with the stator grooves (101); the digital scale (6) is used for calculating the span when installing the U-shaped conductor.