CN218335488U - Stator structure of flat wire motor - Google Patents

Abstract

The utility model discloses a flat wire motor's stator structure, include: the stator comprises a stator core, a first conductor, a second conductor and a third conductor; m stator slots are uniformly arranged on the inner wall of the stator core in the circumferential direction; the first conductor, the second conductor and the third conductor are arranged in the stator slot, a clamping end is formed at one end of the stator core, and a welding end is formed at the other end of the stator core. The utility model adopts a 2-path N-layer winding scheme, and provides a flat wire winding connection scheme with balanced three-phase resistance and no circular current through the connection of 6 neutral point conductors, a first conductor, 6 second conductors and 6 third conductors; the three-phase lead-out wire conductor and the neutral point copper bar are arranged on two adjacent layers, and the positions of the three-phase lead-out wire conductor and the neutral point copper bar are concentrated after the twisting heads, so that the end structure is simplified.

Description

Stator structure of flat wire motor

Technical Field

The utility model belongs to the technical field of the motor, in particular to stator structure of flat wire motor.

Background

The stator structure of the existing Hairpin flat wire motor is formed by connecting a three-phase wire inlet part, a first conductor part, a special-shaped wire clip part and a neutral point part to form a current loop, for a parallel 2-path scheme, an inner layer or outer layer wire inlet mode is generally adopted, and the neutral point and a three-phase wire outlet are formed by an innermost layer wire inlet and outlet or an outermost layer wire inlet and outlet. In order to form a closed loop, the three-phase outgoing line and the neutral point are spaced at a longer distance, the circumferential size of the outgoing line end is occupied more, and a larger outgoing line enveloping size is required.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model discloses a flat wire motor's stator structure, include: the stator comprises a stator core, a first conductor, a second conductor and a third conductor;

m stator slots are uniformly arranged on the inner wall of the stator core in the circumferential direction;

the first conductor, the second conductor and the third conductor are arranged in the stator slot, a hairpin end is formed at one end of the stator core, and a welding end is formed at the other end of the stator core.

Furthermore, the first conductor comprises 1 first conductor bent part, 2 first conductor extension parts and 2 first conductor outer end parts, wherein the 2 first conductor outer end parts extend outwards reversely, the bending angles are the same, the middle span is a, and the end span is b.

Furthermore, the second conductor comprises 1 second conductor bent part, 2 second conductor extended parts and 2 second conductor outer end parts, one second conductor outer end part of the 2 second conductor outer end parts extends outwards, the other second conductor outer end part extends inwards, and the 2 second conductor outer end parts are bent in the same direction, wherein the middle span is c, and the end span is d.

Further, the second conductors are located in the n +24 th, n +28 th, n +30 th, n +32 th, n +34 th and n +38 th stator slots.

Furthermore, the third conductor comprises 1 third conductor bent part, 2 third conductor extended parts and 2 third conductor outer end parts, one third conductor outer end part of the 2 third conductor outer end parts extends outwards, the other third conductor outer end part extends inwards, and the 2 third conductor outer end parts are bent in the same direction, wherein the middle span is e, and the end span is f.

Furthermore, the bending directions of the 2 second conductor outer ends of the second conductor and the 2 third conductor outer ends of the third conductor are opposite.

Still further, the end span d of the second conductor is equal to the end span f of the third conductor.

Further, the third conductor is located in the n +19, n +23, n +25, n +27, n +29 and n +33 stator slots.

Still further, still include: a neutral point conductor;

the neutral point conductor comprises 1 neutral point conductor bending part, 2 neutral point conductor extension parts and 2 neutral point conductor outer end parts, wherein the 2 neutral point conductor outer end parts extend outwards in the reverse direction, the bending angles are different, the middle span is g, and the end span is h.

Further, the neutral point conductors are located in the n +2 th, n +3 th, n +6 th, n +7 th, n +10 th and n +11 th stator slots, respectively.

Still further, it includes: a neutral point copper bar;

the neutral point copper bar is an arc-shaped flat copper bar, is arranged at the hairpin end or the welding end and is connected with one end of the neutral point conductors.

Still further, still include: a three-phase outgoing line conductor;

the middle span of the three-phase outgoing line conductor is a, the end span of the three-phase outgoing line conductor is b, and the three-phase outgoing line conductor is connected with the first conductor;

and the three-phase outgoing line conductors are respectively positioned in the nth, n +1, n +4, n +5, n +8 and n +9 stator slots.

Still further, still include: a lead-out wire conductor;

the two ends of the outgoing line conductor are bent in opposite directions and are connected with the first conductor;

the outgoing line conductor is arranged on the outermost layer or the adjacent layer of the outermost layer of the stator slot.

Furthermore, the intermediate span a of the first conductor, the intermediate span c of the second conductor, the intermediate span e of the third conductor and the intermediate span g of the neutral point conductor are all equal.

Furthermore, the stator slots are internally provided with insulating paper.

Compared with the prior art, the embodiment of the utility model has following advantage at least: a 2-path N-layer scheme is adopted, and a flat wire winding connection scheme with balanced three-phase resistance and no circulating current is provided by connecting 6 neutral point conductors, a first conductor, 6 second conductors and 6 third conductors; the three-phase lead-out wire conductor and the neutral point copper bar are arranged on two adjacent layers, and the positions are concentrated after the head is twisted, so that the end structure is simplified.

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 will 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 in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic view of a stator structure according to an embodiment of the invention;

fig. 2 shows a schematic structural diagram of a stator core and an insulating paper according to an embodiment of the present invention;

FIG. 3 is a top view of the stator structure shown in FIG. 1;

fig. 4 shows a schematic diagram of a three-phase winding according to an embodiment of the invention;

fig. 5 shows a schematic diagram of a phase winding according to an embodiment of the invention;

fig. 6 shows a schematic diagram of a preferred winding according to an embodiment of the invention;

fig. 7 shows a schematic view of a first conductor according to an embodiment of the invention;

fig. 8 shows a schematic view of a second conductor according to an embodiment of the invention;

fig. 9 shows a schematic view of a third conductor according to an embodiment of the invention;

fig. 10 shows a schematic diagram of a neutral conductor in accordance with an embodiment of the present invention;

figure 11 shows a schematic view of a stator structure according to another embodiment of the invention;

FIG. 12 is a winding diagram of the stator structure shown in FIG. 11;

FIG. 13 is a schematic winding unwinding view of the stator structure shown in FIG. 11;

FIG. 14 is a schematic view of a phase winding unwinding of the stator structure of FIG. 11;

FIG. 15 is a schematic view of a preferred winding of the stator structure shown in FIG. 11;

FIG. 16 is a schematic view of the installation of the first conductor;

FIG. 17 is a schematic view of the installation of a pigtail;

FIG. 18 is a schematic view of the installation of the second conductor;

fig. 19 is a schematic view of the installation of the third conductor.

Reference numerals are as follows: 1. a stator core; 2. insulating paper; 3. a hairpin end; 4. welding the end; 5. a neutral point copper bar; 6. a three-phase lead-out wire conductor; 7. a first conductor; 71. a first conductor bend; 72. a first conductor extension; 73. a first conductor outer end; 8. a second conductor; 81. a second conductor bend; 82. a second conductor extension; 83. a second conductor outer end; 9. a third conductor; 91. a third conductor bend; 92. a third conductor extension; 93. a third conductor outer end; 10. a neutral point conductor; 101. a neutral point conductor bent portion; 102. a neutral point conductor extension; 103. a neutral point conductor outer end; 11. a stator slot; 12. and a lead-out wire conductor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a stator structure of flat wire motor, include: a stator core 1, a first conductor 7, a second conductor 8, and a third conductor 9;

m stator slots 11 are uniformly arranged on the inner wall of the stator core 1 in the circumferential direction; m is a natural number of 48 or more and is an integral multiple of 12; illustratively, m is 48.

The first conductor 7, the second conductor 8 and the third conductor 9 are arranged in the stator slot 11, and form a hairpin end 3 at one end of the stator core 1 and a weld end 4 at the other end.

In some embodiments, the stator core 1 is formed by laminating a certain number of silicon steel sheets, and may be formed by riveting, welding or adhering, and 48 rectangular stator slots 11 uniformly distributed along the circumferential direction are formed in the stator core 1 in a circumferential array. As shown in fig. 2, in consideration of insulation, an insulating paper 2 of a certain thickness is inserted into the rectangular stator slots 11.

As shown in fig. 7, the first conductor 7 includes 1 first conductor bent portion 71, 2 first conductor extended portions 72 and 2 first conductor outer end portions 73,2 first conductor outer end portions 73 extending outward in opposite directions, and the bent angles are the same, the middle span is a, and the end span is b. The first conductor 7 is provided in each layer of conductors. Where b > a, illustratively, a is 6 and b is 12.a can also be a natural number such as 4, 5, 7, etc., b can be a natural number such as 10, 11, 13, etc., and the specific numerical value can be determined according to actual conditions. As shown in fig. 16, the first conductor 7 is provided in the stator core 1.

As shown in fig. 8, the second conductor 8 includes 1 second conductor bent portion 81, 2 second conductor extended portions 82 and 2 second conductor outer end portions 83, one of the 2 second conductor outer end portions 83 extends outward, the other second conductor outer end portion 83 extends inward, the 2 second conductor outer end portions 83 are bent in the same direction, the middle span is c, the end span is d, and the second conductor outer end portions are disposed on the outer layer of the stator slot 11, see fig. 18. Where d > c, illustratively, c is 6 and d is 7.c can also be natural numbers such as 4, 5, 7, etc., d can be natural numbers such as 8, 9, etc., and the specific numerical value can be determined according to actual conditions.

6 second conductors 8-an extension are located in the n +24, n +28, n +30, n +32, n +34 and n +38 stator slots 11. Wherein n is more than or equal to 1 and less than or equal to m, and n is a natural number.

In some embodiments, when n is 1, m is 48, an extension of the second conductor 8 is located in the 25 th, 29 th, 31 th, 33 th, 35 th, 39 th stator slots 11. It should be noted that the conductors in the stator slots 11 are arranged in a reciprocating manner, for example, when m is 48, when n is 24, that is, an extension of the second conductor 8 is located in the 48 th stator slot 11, and an extension of the remaining 5 second conductors 8 is sequentially located in the 4 th, 6 th, 8 th, 10 th and 14 th stator slots 11.

As shown in fig. 9, the third conductor 9 includes 1 third conductor bending portion 91, 2 third conductor extending portions 92 and 2 third conductor outer end portions 93, one of the 2 third conductor outer end portions 93 extends outward, the other third conductor outer end portion 93 extends inward, the 2 third conductor outer end portions are bent in the same direction, the middle span is e, the end span is f, and the third conductor outer end portions are disposed in the inner layer of the stator slot 11, see fig. 19. Wherein f > e. Illustratively, e is 6 and f is 7.e can also be a natural number such as 4, 5, 7, etc., f can be a natural number such as 8, 9, etc., and the specific numerical value can be determined according to the actual situation.

The 2 second outer ends 83 of the second conductor 8 are bent in the opposite direction to the 2 third outer ends 93 of the third conductor 9. The end span d of the second conductor 8 is equal to the end span f of the third conductor 9.

The 6 third conductors 9 have an extension located in the (n + 19) th, n +23, n +25, n +27, n +29 and n +33 stator slots 11. Illustratively, 6 extensions of the third conductor 9 are located in the 20 th, 24 th, 26 th, 28 th, 30 th and 34 th stator slots 11.

As shown in fig. 10, the stator structure of the flat wire motor further includes: a neutral point conductor 10;

the neutral point conductor 10 comprises 1 neutral point conductor bending part 101, 2 neutral point conductor extending parts 102 and 2 neutral point conductor outer end parts 103, wherein the 2 neutral point conductor outer end parts 103 extend outwards in a reverse direction, the bending angles are different, the middle span is g, and the end span is h. Where h > g, illustratively, g is 6 and h is 10.g can also be a natural number such as 4, 5, 7, etc., h can be a natural number such as 11, 12, etc., and the specific numerical value can be determined according to actual conditions.

The intermediate span a of the first conductor 7, the intermediate span c of the second conductor 8, the intermediate span e of the third conductor 9 and the intermediate span g of the neutral conductor 10 are all equal.

As shown in fig. 3, the stator structure of the flat wire motor further includes: a neutral point copper bar 5;

the neutral point copper bar 5 is an arc-shaped flat copper bar, is arranged at the hairpin end 3 or the welding end 4, and is respectively connected with one end of 6 neutral point conductors 10, and an extension part of the 6 neutral point conductors 10 is positioned in the n +2 th, n +3 th, n +6 th, n +7 th, n +10 th and n +11 th stator slots 11. Illustratively, an extension of the neutral conductor 10 is located in the 3 rd, 4 th, 7 th, 8 th, 11 th, 12 th stator slots 11.

The stator structure of the flat wire motor further comprises: a three-phase outgoing line conductor 6;

the three-phase outgoing line conductor 6 has a middle span a and an end span b, has the same structure as the first conductor 7, and is connected with the first conductor 7;

an extension part of the three-phase outgoing line conductor 6 is respectively positioned in the n, n +1, n +4, n +5, n +8 and n +9 stator slots 11. Illustratively, an extension of the three-phase outgoing line conductor 6 is located in the 1 st, 2 nd, 5 th, 6 th, 9 th, 10 th stator slots 11.

The three-phase outgoing line is divided into a U, V and W three-phase outgoing line; each three-phase outgoing line is connected with the copper nose through a soft copper wire.

As shown in fig. 4, the three-phase winding of the stator structure is a 2-way parallel connection scheme, and is formed by stacking and winding the first conductor 7 in a wiring manner as shown in fig. 4, so that a winding connection manner with balanced three phases and no circulating current is realized. 2 branches of the U-phase winding are a first branch A1 and a second branch A2, the input end is A +, and the output end is A-; 2 branches of the V-phase winding are a third branch B1 and a fourth branch B2, the input end is B +, and the output end is B-; the 2 branches of the W-phase winding are a fifth branch C1 and a sixth branch C2, the input end is C +, and the output end is C-. As shown in fig. 5, in the developed view of the U-phase winding, the input end of the first branch A1 is A1+, the output end is A1+, the input end of the second branch A2 is A2+, and the output end is A2-. As shown in fig. 6, the incoming line is preferably located at the 6 th floor and the neutral point occurrence is located at the 5 th floor. The utility model discloses an adopt 2 way N layer N to be greater than or equal to 6, connect through 6 neutral conductor 10, first conductor 7, 6 second conductors 8 and 6 third conductors 9 and provide a three phase resistance balanced, and do not have the flat wire winding connection scheme of circulation.

In some embodiments, as shown in fig. 2, the stator core 1 of the flat-wire motor is formed by laminating multiple silicon steel sheets, and includes a stator yoke portion, a stator tooth portion, and a stator tooth head portion. 48 stator slots are defined by three portions of the stator core 1, and an insulating paper 2 of a certain length and thickness is inserted into each slot in consideration of insulation.

Fig. 1 shows a winding coil of a whole flat wire motor, which includes a straight line conductor inserted into a stator slot 11 of a stator core 1, the straight line conductor at one end of the stator core 1 is connected by a U-shaped hairpin to form a hairpin end 3, and the straight line conductor at the other end can form a weld end 4 by a twist-head outward expansion welding method;

the three-phase neutral connection point of the electrical machine is also located in the outermost or outermost adjacent layer in the stator slots 11 of the stator core 1. The electric short circuit of the 6 coil branches can be realized through a simple neutral point copper bar 5.

In the commutation connections for each phase branch, a third conductor 9 and a second conductor 8 are used, which are located in the innermost and outermost layers, respectively, in the stator slots 11.

As shown in fig. 11, another embodiment of the present invention provides a stator structure of a flat-wire motor, which is different from the stator structure in the previous embodiment in that the stator structure includes: and the lead wire conductor 12 does not comprise the neutral point copper bar 5 and the three-phase lead wire conductor 6.

As shown in fig. 17, the two ends of the 12 lead-out wire conductors 12 are bent in opposite directions and connected to the first conductor 7. The outgoing line conductors 12 are disposed at the outermost layer or the outermost adjacent layer of the stator slots 11. Of these, the 6 long lead conductors 12 may be used as three-phase lead wires (or neutral points), and the other 6 short lead conductors 12 may be used as neutral points (or three-phase lead wires).

As shown in fig. 12, in order to electrically connect the conductors in the 48 stator slots 11, it is necessary to use a method such as hairpin or welding. The number of the parallel branches of the stator winding with 48 stator slots 11 is 2, and various spans, such as equal span 6, equal span 5, equal span 7 circulation and the like, can be arranged between the conductors in the stator slots 11 connected with each branch, and are distributed according to the span rule in the circumferential direction of a stator. As shown in fig. 13, assuming that 2N conductors can be inserted into each stator slot 11, there are 2N layers of conductors in each stator slot 11, and it is stated that the outer layer is near the bottom of the stator slot 11 and the inner layer is near the mouth of the stator slot 11. And the conductors in the stator slots 11 corresponding to each branch are circularly installed in the stator slots 11 with the regular span according to adjacent layers until one circle is finished, and the conductors are switched to the next adjacent layer for circular installation. In particular, the incoming and outgoing wires of the three-phase winding of the flat wire motor stator are all arranged on the outermost layer of the stator slot 11. In particular, in the commutation connections of each branch, a number of third conductors 9 are used for electrical cross-over, the hairpin coils of opposite twist sense being located in the innermost layers of the stator slots 11. In order to realize the arrangement and installation of the windings, the welding end 4 of the whole winding needs to be expanded to a proper size from the outer layer, so that the interference between a motor rotor and the inner layer of the winding is avoided, and finally, a three-phase balanced winding connection mode without circulating current is realized. As shown in fig. 14, the winding connection method of one phase winding is adopted. As shown in fig. 15, in the preferred embodiment of the winding of this embodiment, the incoming line is located at the 6 th layer, and the neutral point appears at the 5 th layer.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (15)

1. A stator structure of a flat wire motor, comprising: a stator core (1), a first conductor (7), a second conductor (8), and a third conductor (9);

m stator slots (11) are uniformly arranged on the inner wall of the stator core (1) in the circumferential direction;

the first conductor (7), the second conductor (8) and the third conductor (9) are arranged in the stator slot (11), a clamping end (3) is formed at one end of the stator core (1), and a welding end (4) is formed at the other end of the stator core.

2. The stator structure of a flat wire electric machine according to claim 1, wherein the first conductor (7) includes 1 first conductor bent portion (71), 2 first conductor extended portions (72), and 2 first conductor outer end portions (73), and the 2 first conductor outer end portions (73) extend in opposite directions and have the same bending angle, and have a middle span a and a tip span b.

3. The stator structure of a flat wire electric machine according to claim 2, characterised in that the second conductor (8) comprises 1 second conductor bend (81), 2 second conductor extensions (82) and 2 second conductor outer ends (83), one of the 2 second conductor outer ends (83) extending outwards and the other second conductor outer end (83) extending inwards, the 2 second conductor outer ends (83) being bent in the same direction, the middle span being c and the end spans being d.

4. Stator structure of a flat wire electric machine according to claim 3, characterized in that the second conductor (8) is located in the n +24, n +28, n +30, n +32, n +34 and n +38 stator slots (11).

5. The stator structure of the flat wire motor according to claim 4, wherein the third conductor (9) includes 1 third conductor bent portion (91), 2 third conductor extended portions (92), and 2 third conductor outer end portions (93), one of the 2 third conductor outer end portions (93) extends outward, the other third conductor outer end portion (93) extends inward, the 2 third conductor outer end portions are bent in the same direction, the middle span is e, and the end span is f.

6. Stator structure of a flat wire electric machine according to claim 5, characterized in that the 2 second conductor outer ends (83) of the second conductors (8) are bent in the opposite direction to the 2 third conductor outer ends (93) of the third conductors (9).

7. Stator structure of a flat wire electric machine according to claim 6, characterized in that the end span d of the second conductor (8) is equal to the end span f of the third conductor (9).

8. Stator structure of a flat wire electrical machine according to claim 7, characterized in that the third conductor (9) is located in the n +19, n +23, n +25, n +27, n +29 and n +33 stator slots (11).

9. The stator structure of the flat wire motor according to claim 8, further comprising: a neutral point conductor (10);

the neutral point conductor (10) comprises 1 neutral point conductor bending part (101), 2 neutral point conductor extending parts (102) and 2 neutral point conductor outer end parts (103), wherein the 2 neutral point conductor outer end parts (103) extend outwards in the reverse direction, the bending angles are different, the middle span is g, and the end span is h.

10. The stator structure of a flat wire electric machine according to claim 9, characterized in that the neutral point conductor (10) is located in the n +2, n +3, n +6, n +7, n +10 and n +11 stator slots (11), respectively.

11. The stator structure of the flat wire motor according to claim 10, further comprising: a neutral point copper bar (5);

the neutral point copper bar (5) is an arc-shaped flat copper bar, is arranged at the hairpin end (3) or the welding end (4), and is connected with one end of a plurality of neutral point conductors (10).

12. The stator structure of the flat wire motor according to claim 1, further comprising: a three-phase outgoing line conductor (6);

the middle span of the three-phase outgoing line conductor (6) is a, the end span of the three-phase outgoing line conductor is b, and the three-phase outgoing line conductor is connected with the first conductor (7);

the three-phase outgoing line conductors (6) are respectively positioned in the n, n +1, n +4, n +5, n +8 and n +9 stator slots (11).

13. The stator structure of the flat wire motor according to claim 1, further comprising: a lead-out wire conductor (12);

the bending directions of the two ends of the outgoing line conductor (12) are opposite, and the outgoing line conductor is connected with the first conductor (7);

the outgoing line conductor (12) is arranged on the outermost layer or the adjacent layer of the outermost layer of the stator slot (11).

14. The stator structure of a flat wire electric machine according to claim 9, characterized in that the intermediate span a of the first conductor (7), the intermediate span c of the second conductor (8), the intermediate span e of the third conductor (9), and the intermediate span g of the neutral conductor (10) are all equal.

15. Stator structure of a flat wire electric machine according to claim 1, characterized in that the stator slots (11) are provided with insulating paper (2).

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