CN218335462U - Motor stator and vehicle motor - Google Patents

Abstract

The utility model provides a motor stator, motor stator are N groove 2P utmost point, and N is the stator slot number, and P is the number of pole pairs, a serial communication port, include: a stator core; each phase winding of the three-phase stator winding occupies Q stator slots in each magnetic pole, L layers of the three-phase stator winding are distributed in the radial direction of the stator slots, and the L layers of the winding in the radial direction of the stator slots are divided into L/2 groups of odd-even layers; each phase winding of the three-phase stator winding comprises M parallel branches, each branch of the M parallel branches comprises a plurality of hairpin pieces connected in series, each branch comprises a branch part wound from the radially innermost layer to the radially outermost layer or wound from the radially outermost layer to the radially innermost layer along a circumferential direction, and each group of hairpin pieces in the odd-even layers in the branch parts are wound by 3/2 turns in the circumferential direction of the stator core. The utility model discloses can realize the integration of motor stator winding type to realize effective setting and adjustment of motor electromagnetic characteristic.

Description

Motor stator and vehicle motor

Technical Field

The utility model mainly relates to the field of motors, especially, relate to a motor stator and automobile-used motor.

Background

In a hairpin machine, the stator winding is formed by connecting a plurality of hairpin elements in the form of flat wires (flat wires as opposed to round wires). The winding is made into a shape similar to that of a hairpin, and then penetrates into a stator slot, and then the end part of the hairpin is welded at a welding end. How to rapidly manufacture the required types of hairpin elements in batches and winding the hairpin elements to form the motor stator meeting the specific electromagnetic property requirements is a subject to be dealt with.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a motor stator and automobile-used motor realizes the integration of motor stator winding type to and realize effective setting and the adjustment of motor electromagnetic characteristic, improve the manufacturing and the operating efficiency of motor.

In order to solve the technical problem, the utility model provides a motor stator, motor stator is the 2P utmost point in N groove, and N is the stator slot number, and P is the pole pair number, and N and P are positive integer, a serial communication port, include: a stator core having N stator slots; the stator winding is wound in N stator slots of the stator core, each phase winding of the three-phase stator winding occupies Q stator slots in each magnetic pole, L layers are distributed on the three-phase stator winding in the radial direction of the stator slots, L is an even number, and the L layers of windings in the radial direction of the stator slots are divided into L/2 groups of odd-even layers; each phase winding of the three-phase stator winding comprises M parallel branches, each branch of the M parallel branches comprises a plurality of clamping pieces connected in series, each clamping piece of the plurality of clamping pieces is wound on two corresponding layers of each odd-even layer, each clamping piece comprises a non-welding end and a welding end, each clamping piece comprises two in-slot parts inserted into the stator slots and a connecting part connecting the two in-slot parts at the non-welding end, and the two in-slot parts are inserted into the stator slots of two adjacent magnetic poles; each branch comprises a branch part wound from the radially innermost layer to the radially outermost layer or wound from the radially outermost layer to the radially innermost layer along one circumferential direction, and the hairpin elements in each group of odd and even layers in the branch part are wound by 3/2 of turns in the circumferential direction of the stator core.

In an embodiment of the present invention, the number of the hairpin elements in each odd-even layer group in the branch portion is T = (3/2) × P, the stator slot span of the T hairpin elements includes a combination of a first long span H1 and a second short span H2, the first long span H1 > N/2P, the second short span H2 < N/2P;

the number of the hairpin elements with the stator slot span being a first long span H1 is T1, the number of the hairpin elements with the stator slot span being a first short span H2 is T2, and T1+ T2= T; and (T1 × H1+ T2 × H2)/T = N/2P.

In an embodiment of the present invention, the combination of the stator slot span of the T hairpin elements including the first long span H1 and the second short span H2 includes:

the stator slot span of the non-welding ends of the T hairpin elements comprises a combination of a first long span H1 and a second short span H2.

The utility model discloses an in the embodiment, the welding end of every hairpin piece includes along the torsional leg portion of circumference, and the non-welding end of two hairpin pieces that link to each other realizes the electricity through the welding of leg portion and connects.

In an embodiment of the present invention, the span of the stator slot of the leg portion of each hairpin is (N/2P)/2.

In one embodiment of the present invention, the stator core of N-slot 2P pole is a 72-slot 8-pole stator core, the first long span H1 is 10, the second short span H2 is 7, the number of the hair fasteners in each odd-even layer of the branch part is 6, and the span of the 6 hair fasteners is 10, 7, 10, 7 or 7, 10, 7, 10 or 10, 7, 10, 7, 10.

In an embodiment of the present invention, when M =2, the winding start position of the first parallel branch and the winding start position of the second parallel branch are opposite to each other in the radial direction of the stator core.

In an embodiment of the present invention, each branch comprises two branch parts, and the two branch parts are connected at the radially innermost layer or the radially outermost layer.

In an embodiment of the present invention, the connection mode between the first end and the second end of the three-phase stator winding includes a delta connection and a star connection.

The utility model also provides an automobile-used motor, including aforementioned arbitrary motor stator.

Compared with the prior art, the utility model has the advantages of it is following: according to the technical scheme, the span of the stator groove of each hairpin element at the leg part of the welding end is the same, so that the manufacturing type of the hairpin element at the leg part of the welding end can be simplified, and the manufacturing and winding efficiency of the hairpin element is improved. The technical scheme of the application also realizes that the number of the hair clips penetrating through the stator slots at different positions in the stator slot of each pole and each phase is equal, so that the balance of windings can be realized, and the adjustment and control of the electromagnetic parameters and the performance of the motor are facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the application.

In the drawings:

fig. 1 is a schematic structural diagram of a stator of an electric machine according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a stator of a motor according to an embodiment of the present application.

Fig. 3 is an exploded view of a stator of a motor according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a hairpin element of a motor stator according to an embodiment of the present application.

Fig. 5 is an expanded view of winding manner of two branches of one phase winding of a stator winding of the motor according to an embodiment of the present application.

Fig. 6 is an expanded view of winding of one branch of one phase winding of a stator winding of the motor according to an embodiment of the present application.

Fig. 7A is a partial development of a winding pattern of a hairpin element for one leg of one phase winding of a stator winding of an electric machine according to an embodiment of the application.

Fig. 7B is another portion of a hairpin winding pattern development for one leg of a phase winding of a stator winding of an electric machine according to an embodiment of the present application.

Fig. 8 is an expanded view of the winding pattern of the other branch of one phase winding of the stator winding of the motor according to the embodiment of the present application.

Fig. 9A is a portion of a hairpin winding pattern development of another leg of a phase winding of a stator winding of an electric machine according to an embodiment of the present application.

Fig. 9B is another portion of a hairpin winding pattern for another leg of a phase winding of a stator winding of an electric machine according to an embodiment of the application.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" are intended to cover only the explicitly identified steps or elements as not constituting an exclusive list and that the method or apparatus may comprise further steps or elements.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

The embodiment of the application describes a motor stator and a motor for a vehicle.

Fig. 1 is a schematic structural diagram of a stator of a motor according to an embodiment of the present application. Fig. 2 is a schematic structural diagram of a stator of a motor according to an embodiment of the present application. Fig. 3 is an exploded view of a stator of an electric motor according to an embodiment of the present application. Fig. 4 is a schematic structural diagram of a hairpin element of a motor stator according to an embodiment of the present application. Referring to fig. 1 to 4, the motor stator 100 includes a stator core 262 and three-phase stator windings wound in stator slots 238 of the stator core 262. The stator winding is formed by winding a plurality of hairpins. Shown in fig. 1 are card issuers 260a, 260b and 260c. The stator core 262 includes a stator tooth 235 and a stator yoke 233. The stator slots are separated by stator teeth 235.

Each of the hair fasteners includes a non-welding end and a welding end, such as the hair fastener 260 of FIG. 4 including a non-welding end X2 and a welding end Y2. The clip member includes two in-slot portions inserted into the stator slots and a connecting portion connecting the two in-slot portions at a non-welded end, and specifically for example, the clip member 260 has a first in-slot portion 460 and a second in-slot portion 470 inserted into the stator slots, and also has a first connecting portion 461 and a second connecting portion 471. The junction of the first and second connection portions 461, 471 is referred to as the top connection end 486. The hairpin element 240 has a leg portion 489 twisted in the circumferential direction sr1 or sr2 of the motor stator at the welding end Y2, and each two hairpin elements connected are electrically connected by welding of the leg portion.

In some embodiments, the motor stator is an N-slot 2P pole, N is the number of stator slots, P is the number of pole pairs, and N and P are both positive integers. The stator core of the motor stator has N stator slots, and the three-phase (e.g., including U-phase, V-phase, and W-phase) stator winding is wound around the N stator slots of the stator core. The stator core of the N-slot 2P pole includes, for example: 72-slot 8-pole stator core.

Each phase winding of a three-phase stator winding occupies Q stator slots in each pole, Q may be referred to as the number of slots per pole per phase. For a motor stator formed by winding a stator core with 72 slots and 8 poles, the number of slots per pole and phase of a three-phase stator winding is 72/8/3=3. And L layers of the three-phase stator winding are distributed in the radial direction of the stator slot, L is an even number, and the L layers of the winding in the radial direction of the stator slot are divided into L/2 groups of odd-even layers. Each phase winding of the three-phase stator winding comprises M parallel branches. M is for example 2, i.e. each phase winding of the three-phase stator winding comprises 2 parallel branches.

Fig. 5 is an expanded view of winding manner of two branches of one phase winding of a stator winding of the motor according to an embodiment of the present application. Fig. 6 is an expanded view of winding of one branch of one phase winding of a stator winding of the motor according to an embodiment of the present application. Fig. 7A is a portion of a hairpin winding pattern development for one leg of one phase winding of a stator winding of an electric machine according to an embodiment of the present application. Fig. 7B is another portion of a hairpin winding pattern for one leg of a phase winding of a stator winding of an electric machine according to an embodiment of the application. One branch shown in fig. 7A, 7B is one branch corresponding to fig. 6. Fig. 8 is an expanded view of the winding pattern of the other branch of one phase winding of the stator winding of the motor according to an embodiment of the present application. Fig. 9A is a partial development of a winding pattern of a hairpin element of another leg of a phase winding of a stator winding of a motor of an embodiment of the invention. Fig. 9B is another portion of a hairpin winding pattern for another leg of a phase winding of a stator winding of an electric machine according to an embodiment of the application. The other branch illustrated in fig. 9A, 9B is another branch corresponding to fig. 8. Fig. 5 to 9B correspond to an embodiment when each phase winding of the three-phase stator winding includes 2 parallel branches.

The winding method development of the motor stator winding in fig. 5 is a winding method development of the stator winding in the stator slot when viewed from a non-welding side of the motor stator, and the viewing angles of fig. 6 and fig. 8 are also similar. In the developed views (which may also be referred to as developed lattices for convenience of description) shown in fig. 5, 6 and 8, the first row of the developed lattices indicates the number (Slot No.) of the stator Slot. Layer1, layer2, 8230, layer8 respectively indicate the first Layer, the second Layer, 8230and the eighth Layer of the stator winding. The first layer is located at the radially outer (outer) layer of the stator core, and the eighth layer is located at the radially inner (inner) layer of the stator core. The axial direction of the stator core is indicated for example by a in fig. 1 and the radial direction of the stator core is indicated for example by R in fig. 1.

In fig. 5 to 9B, the two in-slot portions of each clip are inserted into the stator slots of the adjacent two poles. Each branch of the M Parallel branches (Parallel Path) comprises a plurality of hair fasteners connected in series, and each hair fastener of the hair fasteners is wound on two corresponding layers of each odd-even layer. For example, the first and second layers of the stator winding form a set of odd-even layers, the third and fourth layers form a set of odd-even layers, and the fifth and sixth layers form a set of odd-even layers, 8230.

In fig. 5, the hair pieces are shown in alphanumeric combination, the numerals representing the number of hair pieces in each branch, the Current in the winding of the hair pieces is alternating Current, where "i" is in (input), "o" is out (output), and in the expanded lattice of fig. 5, '×' and '·' also indicate the instantaneous Current Direction (Current Direction) of the alternating Current. In fig. 5, the corresponding card issuing devices of different branches are simply distinguished by different coloring, and the analysis of one branch can be combined with the demonstration of fig. 6 to 9B. For example, in fig. 6, "1i" corresponds to the stator groove 68, one in-groove portion representing No. 1 clip piece is inserted into the stator groove 68, and "1o" corresponds to the stator groove 58, the other in-groove portion representing No. 1 clip piece is inserted into the stator groove 58, and the instantaneous current flow direction in No. 1 clip piece is 1i → 1o, i.e., from the in-groove portion 1i to the in-groove portion 1o through the connection portion of No. 1 clip piece. In fig. 8, "4i" corresponds to the stator slot 50 (referring to the 50 th stator slot), one in-slot portion representing the No. 4 clip is inserted into the stator slot 50, "4o" corresponds to the stator slot 40, the other in-slot portion representing the No. 4 clip is inserted into the stator slot 40, and the instantaneous Current flow Direction (Current Direction) in the No. 4 clip is 4i → 4o, i.e., it is branched from the in-slot portion 4i to the in-slot portion 4o through the connection portion of the No. 4 clip.

Each branch comprises a branch part which is wound from the radially innermost layer to the radially outermost layer or from the radially outermost layer to the radially innermost layer along one circumferential direction. For example, each branch is formed by a first branch portion and a second branch portion connected in series, the first branch portion is wound from an innermost layer (inner) to an outermost layer (outer) or from the outermost layer (outer) to the innermost layer (inner) in a first direction in the circumferential direction sr1 or sr2 of the stator core, and the second branch portion is wound from the outermost layer to the innermost layer or from the innermost layer to the outermost layer in a second direction in the circumferential direction sr1 or sr2 of the stator core, the second direction being opposite to the first direction. The hairpin elements of the first branch portion or the second branch portion in each group of odd-even layers are wound by 3/2 of a turn in the circumferential direction of the stator core (i.e., a turn and a half are wound in the circumferential direction of the stator core).

Fig. 7A is a development view of the winding manner of the plurality of hair fasteners in the parallel branch 1 corresponding to fig. 6 from the first layer to the fourth layer. Fig. 7B is a development view of the winding manner of the plurality of hair fasteners in the parallel branch 1 corresponding to fig. 6 in the fifth to eighth layers. Fig. 7A and 7B can be viewed in succession to correspond to the entirety of fig. 6. The foregoing illustration is used because the details shown in fig. 7A and 7B are denser and more difficult to see when combined into a single figure. The corresponding diagrams of fig. 9A, 9B and 8 are also similar.

In some embodiments, the number of hairpin elements in each group of odd-even numbered tiers in the leg portion is T = (3/2) × P, the stator slot spans of the T hairpin elements including a combination of a first long span H1 and a second short span H2, the first long span H1 > N/2P, the second short span H2 < N/2P; the number of the hairpin elements with the stator slot span being a first long span H1 is T1, the number of the hairpin elements with the stator slot span being a first short span H2 is T2, and T1+ T2= T; and (T1 × H1+ T2 × H2)/T = N/2P. For example, referring to fig. 6 to 7B, for a motor stator formed by winding a stator core with 72 slots and 8 poles (the number P of pole pairs is 4), in a branch portion of a Parallel branch 1 (Parallel Path1, PP 1) of two Parallel branches in a three-phase winding, the number of hairpin elements in each group of odd-even layers is T = (3/2) × 4=6. The stator slot span of the 6 hairpin elements comprises a combination of a first long span 10 (H1 taken as 10) and a second short span 7 (H2 taken as 7). N/2p =72/8= 9. H1 is more than N/2P, and H2 is less than N/2P. In each odd-even layer, the number of hairpins with a stator slot span of the first long span 10 is 4 (T1 is 4), the number of hairpins with a stator slot span of the first short span 7 is 2 (T2 is 4), and (T1 × H1+ T2 × H2)/T = (4 × 10+2 × 7)/6 =9= n/2P. The stator groove span of the T hairpin elements includes a combination of a first long span H1 and a second short span H2, more specifically, the stator groove span of the non-welding end of the T hairpin elements (i.e., the stator groove span of the in-groove portion of the hairpin element) includes a combination of a first long span H1 and a second short span H2.

Specifically, in fig. 6 to 7B, the first branch portion of the parallel branch 1 includes the No. 1 hair clip piece "1i → 1o", the No. 2 hair clip piece "2i → 2o", the No. 3 hair clip piece, the No. 4 hair clip piece, the No. 5 hair clip piece, the No. 6 hair clip piece, the No. 7 hair clip piece, the No. 8 hair clip piece, the No. 9 hair clip piece, \8230; \ 8230;, the No. 19 hair clip piece, the No. 20 hair clip piece, the No. 21 hair clip piece, the No. 22 hair clip piece, the No. 23 hair clip piece "23i → 23o", and the No. 24 hair clip piece "24i → 24o" connected in series. The second branch portion of the parallel branch 1 includes 25 th card issuing member "25i → 25o", 26 th card issuing member "26i → 26o", 27 th card issuing member, 28 th card issuing member, 29 th card issuing member, 30 th card issuing member, 31 th card issuing member, 32 th card issuing member, 33 rd card issuing member, \8230 \ 8230; \ 8230, 43 rd card issuing member, 44 th card issuing member, 45 th card issuing member, 46 th card issuing member, 47 th card issuing member "47i → 47o", 48 th card issuing member "48i → 48o" connected in series.

No. 1 hairpin piece, no. 2 hairpin piece, no. 3 hairpin piece, no. 4 hairpin piece, no. 5 hairpin piece and No. 6 hairpin piece are around establishing 3/2 circle (namely around establishing a round half) in a set of odd even layer that eighth layer and seventh layer constitute. The number 1 hairpin, the number 2 hairpin, the number 3 hairpin, the number 4 hairpin, the number 5 hairpin and the number 6 hairpin are respectively 10, 7, 10 and 7 in the span of the stator slot at the non-welding end. After the odd-even layer formed by the eighth layer and the seventh layer is wound for a half circle, the first branch part of the parallel branch 1 jumps to the odd-even layer formed by the sixth layer and the fifth layer, and specifically, the odd-even layer formed by the sixth layer and the fifth layer is wound for 3/2 circles (namely, the odd-even layer is wound for a half circle) by the No. 7 hairpin element, the No. 8 hairpin element, the No. 9 hairpin element, the No. 10 hairpin element, the No. 11 hairpin element and the No. 12 hairpin element. Then, 3/2 circles are wound in a group of odd-even layers formed by a fourth layer and a third layer by the No. 13 hairpin, the No. 14 hairpin, the No. 15 hairpin, the No. 16 hairpin, the No. 17 hairpin and the No. 18 hairpin, 3/2 circles are wound in a group of odd-even layers formed by a second layer and a first layer by the No. 19 hairpin, the No. 20 hairpin, the No. 21 hairpin, the No. 22 hairpin, the No. 23 hairpin and the No. 24 hairpin, and the winding of the first branch part of the parallel branch 1 is finished. The stator slot spans of the non-welded ends of the fasteners in the odd and even layers of each layer of the first branch portion of the parallel branch 1 are respectively 10, 7, 10 and 7 in turn. After the first branch part of the parallel branch 1 is wound, the second branch part of the parallel branch 1 is switched, the parallel branch 1 (PP 1) is connected to the support leg 25i of the 25 th hairpin in the 14 th stator slot of the 1 st layer along the second direction at the support leg part 24o of the 24 th hairpin positioned in the 5 th stator slot of the 1 st layer, and the switching from the first branch part to the second branch part of the parallel branch 1 is realized. The winding direction of the first branch part of the parallel branch 1 can be called as winding from the radially innermost layer to the radially outermost layer along a circumferential direction.

Next, the second branch portion of the parallel branch 1 is wound 3/2 times (i.e., wound one and a half) in a group of odd-even layers composed of the first layer and the second layer by the 25 th hairpin, the 26 th hairpin, the 28 th hairpin, the 29 th hairpin and the 30 th hairpin, and the stator slot spans of the 25 th hairpin, the 26 th hairpin, the 27 th hairpin, the 28 th hairpin, the 29 th hairpin and the 30 th hairpin at the non-welding end are respectively 7, 10, 7, 10 and 10. 3/2 circles are wound in a group of odd-even layers formed by the third layer and the fourth layer through the No. 31 hairpin, the No. 32 hairpin, the No. 33 hairpin, the No. 34 hairpin, the No. 35 hairpin and the No. 36 hairpin. Then, winding 3/2 circles in a group of odd-even layers formed by a fifth layer and a sixth layer through a 37 th card sending piece, a 38 th card sending piece, a 39 th card sending piece, a 40 th card sending piece, a 41 th card sending piece and a 42 th card sending piece, winding 3/2 circles in a group of odd-even layers formed by a seventh layer and an eighth layer through a 43 th card sending piece, a 44 th card sending piece, a 45 th card sending piece, a 46 th card sending piece, a 47 th card sending piece and a 48 th card sending piece, and winding the second branch part of the parallel branch 1. The stator slot spans of the non-welded ends of the fasteners in the odd and even layers of each layer of the first branch portion of the parallel branch 1 are 7, 10, 7, 10 and 10 in turn. The winding direction of the second branch part of the parallel branch 1 can be referred to as winding from the radially outermost layer to the radially innermost layer along one circumferential direction. The two leg portions are connected at a radially innermost layer or a radially outermost layer. The stator groove span (i.e., the twist span of the leg portion in the circumferential direction) of the leg portion of each hairpin is (N/2P)/2 =9/2=4.5.

Fig. 8 to 9B show the winding of a plurality of hair fasteners in the parallel branch 2 (PP 2). The winding mode of the hair fasteners in the parallel branch 2 is similar to that of the parallel branch 1, and the hair fasteners of the winding are different in the specific distribution positions of the stator slots. In some embodiments, the winding start position of the parallel arm 2 is opposite to the winding start position of the parallel arm 1 in the radial direction of the stator core. The span of the stator slots of the hairpin elements of the first branch part of the parallel branch 2 in each group of odd-even layers at the non-welding end is sequentially 10, 7, 10, 7, and the span of the stator slots of the hairpin elements of the second branch part of the parallel branch 2 in each group of odd-even layers at the non-welding end is sequentially 7, 10, 7, 10. In some embodiments, the stator slot spans at the non-welding end of the hairpin elements in each set of odd-even layers of the first branch portion or the second branch portion of each parallel branch are respectively 10, 7, 10, 7, 10 in turn.

In fig. 7A to 7B, parallel Path 1.1 (PP 1.1), parallel Path 1.2, parallel Path 1.3, \ 8230, and Parallel Path 1.8 indicate respective serially connected portions when the Parallel branch 1 is wound in the first direction. In fig. 9A to 9B, parallel Path 2.1 (PP 2.1), parallel Path 2.2, parallel Path 2.3, \ 8230, and Parallel Path 2.8 indicate respective serially connected portions when the Parallel branch 2 is wound in the second direction.

In some embodiments, the connection of the leading End (which may specifically include the Start End (Start) and the tail End (End)) of the three-phase stator winding includes a delta connection or a star connection. In the delta connection method, the start end and the tail end of a three-phase winding are sequentially connected end to end, and then three connection points are led out to serve as three phase lines of three-phase electricity. In the star connection, one ends of the three-phase windings are connected, and the common connection point is led out as a neutral line, and the other ends of the three-phase windings are respectively used as three phase lines of three-phase power. In the embodiments shown in fig. 5 to 9B, the starting end and the tail end of different parallel branches of the stator winding are respectively indicated by an arrow in an upward direction and an arrow in a downward direction, for example, in fig. 6, the arrow 601 in the upward direction indicates the starting end of the parallel branch 1 of the stator winding, and the arrow 602 in the downward direction indicates the tail end of the parallel branch 1 of the stator winding. Correspondingly, in fig. 7B, an arrow 701 in an upward direction indicates a starting end of the stator winding parallel branch 1, and an arrow 702 in a downward direction indicates a tail end of the stator winding parallel branch 1. Two points 701 in fig. 7B actually provide a point of connection where the 13 th hair fastener and the 16 th hair fastener merge due to the two positions actually provided when actually connecting.

According to the technical scheme, the span of the stator slot of the leg part of the welding end of each hair clip piece is the same, so that the manufacturing type of the leg part of the welding end where the hair clip piece is located can be simplified, and the manufacturing and winding efficiency of the hair clip piece is improved. The non-welding end of the hairpin element is also combined into two span types of hairpin elements, so that the integration of winding types is realized, and the height of the top connecting end of the non-welding end of the hairpin element is controlled. The technical scheme of the application also realizes that the number of the hairpin elements passing through the stator slots at the left, middle and right positions in 3 slots is the same in the embodiment shown in fig. 5 to 9B, namely 3 stator slots of each pole and each phase, so that the balance of the winding can be realized, and the adjustment and control of the electromagnetic parameters and the performance of the motor are facilitated.

The present application further provides a motor for a vehicle including the motor stator described in any of the above embodiments. This application can realize practicing thrift automobile-used motor manufacturing cost to and promote automobile-used motor's manufacturing and availability factor.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such alterations, modifications, and improvements are intended to be suggested herein and are intended to be within the spirit and scope of the exemplary embodiments of this application.

Also, the present application uses specific words to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single disclosed embodiment.

Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.

Claims (10)

1. The utility model provides a motor stator, motor stator is N groove 2P utmost point, and N is the stator slot number, and P is the pole pair number, and N and P are positive integer, its characterized in that includes:

a stator core having N stator slots;

the stator winding is wound in N stator slots of the stator core, each phase winding of the three-phase stator winding occupies Q stator slots in each magnetic pole, L layers are distributed on the three-phase stator winding in the radial direction of the stator slots, L is an even number, and the L layers of windings in the radial direction of the stator slots are divided into L/2 groups of odd-even layers;

each phase winding of the three-phase stator winding comprises M parallel branches, each branch of the M parallel branches comprises a plurality of clamping pieces connected in series, each clamping piece of the plurality of clamping pieces is wound on two corresponding layers of each odd-even layer, each clamping piece comprises a non-welding end and a welding end, each clamping piece comprises two in-slot parts inserted into the stator slots and a connecting part connecting the two in-slot parts at the non-welding end, and the two in-slot parts are inserted into the stator slots of two adjacent magnetic poles;

each branch comprises a branch part wound from the radially innermost layer to the radially outermost layer or wound from the radially outermost layer to the radially innermost layer along one circumferential direction, and the hairpin elements in each group of odd and even layers in the branch part are wound by 3/2 turns in the circumferential direction of the stator core.

2. The stator according to claim 1, wherein the number of flip-flops in each odd-even layer of the branch portion is T = (3/2) × P, the stator slot spans of the T flip-flops include a combination of a first long span H1 and a second short span H2, the first long span H1 > N/2P, the second short span H2 < N/2P;

the number of the hairpin elements with the stator slot span being a first long span H1 is T1, the number of the hairpin elements with the stator slot span being a first short span H2 is T2, and T1+ T2= T; and (T1 × H1+ T2 × H2)/T = N/2P.

3. The stator according to claim 2, wherein the stator slot spans of the T hairpin elements including the combination of the first long span H1 and the second short span H2 comprise:

the stator slot span of the non-welded end of the T hairpin elements comprises a combination of a first long span H1 and a second short span H2.

4. The stator as claimed in claim 3, wherein the welding end of each of the hair clamping pieces includes a leg portion twisted in a circumferential direction, and the non-welding ends of the two connected hair clamping pieces are electrically connected by the leg portion welding.

5. The stator for an electric motor according to claim 4, wherein the span of the stator slot of the leg portion of each clip piece is (N/2P)/2.

6. The stator of an electric machine according to claim 2, wherein the stator core of N-slot 2P pole is a stator core of 72-slot 8 pole, the first long span H1 is 10, the second short span H2 is 7, the number of the hairpins of the branch part in each set of odd-even number layers is 6, and the spans of the 6 hairpins are 10, 7, 10, 7 or 7, 10, 7, 10 or 10, 7, 10, 7, 10 in sequence.

7. The stator according to claim 1, wherein when M =2, a winding start position of a first parallel branch is opposite to a winding start position of a second parallel branch in a radial direction of the stator core.

8. The electric machine stator of claim 6, wherein each leg comprises two leg portions connected at a radially innermost layer or a radially outermost layer.

9. The machine stator of claim 1 wherein said three phase stator windings are connected end to end in delta and star connections.

10. An electric machine for a vehicle comprising an electric machine stator according to any one of claims 1-9.

Images