Integral pitch winding stator

Abstract

The utility model discloses an integral pitch winding stator, which comprises an iron core and a stator winding wound on the iron core, 48 stator slots are arranged on the iron core at intervals, a plurality of wire layers are respectively arranged in each stator slot, the wire layers in each stator slot are sequentially arranged from inside to outside along the radial direction, and the stator winding is a three-phase winding; each phase winding comprises four parallel branches, each branch comprises a first leading-out end and a second leading-out end, the first leading-out ends of the branches in the same phase are respectively connected to different wire layers in the same stator slot, and the second leading-out ends of the branches in the same phase are respectively connected to different wire layers in the same stator slot. And the first leading-out end and the second leading-out end are respectively led out of different stator slots. In the four branches of each phase winding, each first leading-out end is led out from the same stator slot, and each second leading-out end is led out from the same stator slot, so that only two stator slots of each phase are provided with the leading-out ends, the wiring is simple, and the circuit is neat after wiring.

Description

Technical Field

[0001] This utility model relates to the field of stator winding technology, and more specifically to a full-pitch winding stator. Background Technology

[0002] With the development of new energy vehicles, hybrid and pure electric vehicles have increasingly higher requirements for the power density and quality of motors. Traditional round copper wire motors can no longer meet these requirements. Flat copper wire motors have improved power density compared to round wire motors, which can meet the needs of new energy vehicles. Moreover, the power density increases accordingly with the increase of the number of flat wire layers.

[0003] In the prior art, the common connection method for 8-layer flat copper wire armature windings is as follows: each phase is divided into 4 branches, with the first and second layers of copper wire forming the first branch, the third and fourth layers of copper wire forming the second branch, the fifth and sixth layers of copper wire forming the third branch, and the seventh and eighth layers of copper wire forming the fourth branch. This connection method has the following problems: the lead wires of the 4 branches of the same phase winding are led out from different slots, resulting in a relatively complicated winding connection. For example, the connection method disclosed in "A Novel Short-Pitch Winding Stator and Motor" with publication number CN 112751438A has the above-mentioned problems.

[0004] In view of this, this application has conducted in-depth research on this basis, resulting in this case. Utility Model Content

[0005] The purpose of this invention is to provide a stator with a simple and regular wiring configuration and a full-pitch winding.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A full-pitch winding stator includes an iron core and a stator winding wound on the iron core. The iron core has 48 stator slots spaced apart, and each stator slot has a plurality of wire layers. The wire layers in each stator slot are arranged radially from the inside to the outside. The stator winding is a three-phase winding. Each phase of the winding includes four parallel branches. Each branch includes a first lead-out end and a second lead-out end. The first lead-out ends of the branches of the same phase are respectively connected to different wire layers in the same stator slot, and the second lead-out ends of the branches of the same phase are respectively connected to different wire layers in the same stator slot. The first lead-out end and the second lead-out end are respectively led out of different stator slots.

[0008] Each branch of the three-phase winding includes two connecting wires wound on the iron core. The winding span between the starting ends of the two connecting wires is 5 slots. In each branch, the two connecting wires are connected together sequentially through crossover wires according to the arrangement order of their respective starting ends.

[0009] In each of the aforementioned branches, the two connecting lines correspond to connecting line one and connecting line two, respectively. One of the winding spans of connecting line one is 4 slots, and this winding span is referred to as winding span one. The other winding spans of connecting line one, other than winding span one, are all 5 slots. The stator slot in which connecting line one is wound according to winding span one is referred to as reference slot one, and the other is referred to as reference slot two. When connecting line one 21 is wound in the wire layers in the other stator slots that are not reference slot one and reference slot two, it is arranged sequentially from the outside to the inside. The number of wire layers in reference slot one and reference slot two is the same.

[0010] The stator slot where the connecting wire 2 is wound around the adjacent reference slot 1 is designated as reference slot 3. The span of the cross wire connected to the connecting wire 2 in reference slot 3 is 6 slots, and this span is designated as the second span. The other spans of the connecting wire 2, excluding the second span, are 5 slots. The number of wire layers of the connecting wire 2 wound around the reference slot 3 and the number of wire layers passing through the stator slot corresponding to the second span are the same. Among them, when the connecting wire 2 is wound around the reference slot 3 and passes through the stator slot corresponding to the second span, the wire layers are arranged sequentially from the outside to the inside.

[0011] The starting end of the first connecting wire forms the first lead-out end, and the starting end of the second connecting wire forms the second lead-out end.

[0012] All the connecting lines and all the cross lines are flat copper wires.

[0013] The flat wire conductors in each stator slot have 8 layers, and the 8 layers of flat wire conductors in each stator slot are arranged radially from the inside to the outside as a, b, c, d, e, f, g and h.

[0014] Starting from one of the stator slots, the stator slots are numbered sequentially from slot 1 to slot 48 in a counterclockwise direction. That is, the 48 stator slots are slot 1, slot 2, slot 3, ..., slot 47, slot 48.

[0015] The three-phase windings are respectively designated as U-phase windings, V-phase windings, and W-phase windings. The first lead-out terminals of each branch in the U-phase winding correspond to the leads-out terminals of the h-line, f-line, d-line, and b-line layers of slot 21. The second lead-out terminals of each branch in the U-phase winding correspond to the leads-out terminals of the g-line, e-line, c-line, and a-line layers of slot 27. The first lead-out terminals of each branch in the V-phase winding correspond to the h-line and f-line layers of slot 25. The first lead-out end of each branch in the U-phase winding corresponds to one end of the g, e, c, and a line layers of slot 31, respectively; the second lead-out end of each branch in the W-phase winding corresponds to one end of the h, f, d, and b line layers of slot 29, respectively; and the second lead-out end of each branch in the U-phase winding corresponds to one end of the g, e, c, and a line layers of slot 35, respectively.

[0016] With the above structure, the present invention has the following beneficial effects: The three-phase windings of the present invention all adopt four branches. The first lead of each branch of each phase winding is connected to the same positioning slot, and each second lead is connected to another positioning slot. That is, the four first leads of each phase winding are led out from the same positioning slot, and the four second leads are led out from the same positioning slot. In this way, the winding wiring is simple and clear, and the winding wiring is more regular after the wiring is completed. Attached Figure Description

[0017] Figure 1 This is a winding development diagram of the four branches of the U-phase winding in this utility model.

[0018] Figure 2 This is a schematic diagram of the composite U-phase winding in this utility model.

[0019] Figure 3 for Figure 2 A magnified view of A in the middle.

[0020] Figure 4 This is a schematic diagram of the V-phase winding in this utility model.

[0021] Figure 5 for Figure 4 A magnified view of B in the middle.

[0022] Figure 6 This is a schematic diagram of the composite of the W-phase winding in this utility model.

[0023] Figure 7 for Figure 6 A magnified view of C.

[0024] In the picture:

[0025] 10 - Stator winding; 21 - Connecting line one; 22 - Connecting line two; 3 - Crossover line. Detailed Implementation

[0026] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0027] A type of full-pitch winding stator, such as Figure 1-7 As shown, the device includes an iron core and a stator winding 10 wound on the iron core. The iron core has 48 stator slots evenly spaced, and each stator slot has several wire layers. The wire layers in each stator slot are arranged radially from the inside to the outside, where the inside refers to the direction closest to the iron core. The stator winding 10 is a three-phase winding, namely U-phase, V-phase and W-phase. Each phase winding includes 4 parallel branches. Each branch includes a first lead-out terminal and a second lead-out terminal. The first lead-out terminals of each branch of the same phase are respectively connected to different wire layers in the same stator slot, and the second lead-out terminals of each branch of the same phase are respectively connected to different wire layers in the same stator slot. The first lead-out terminal and the second lead-out terminal are respectively led out of different stator slots.

[0028] For ease of description, starting with one of the stator slots, the stator slots are numbered sequentially from slot 1 to slot 48 in a counterclockwise direction. That is, the 48 stator slots are slot 1, slot 2, slot 3, ..., slot 47, and slot 48.

[0029] In this embodiment, the stator slot has a conventional shape, such as a rectangular slot, and the stator slot corresponds to 8 pairs of magnetic poles.

[0030] Furthermore, each stator slot is equipped with insulating paper, which is laid on the slot wall. In addition, eight wire layers are arranged radially from the inside to the outside of the iron core in the stator slot. Here, "inner side" refers to the direction closest to the iron core. For ease of description, these eight wire layers are arranged radially from the inside to the outside of the iron core as wire layers a, b, c, d, e, f, g, and h. The insulating paper is the conventional insulating paper used on motor stators, so it will not be described in detail.

[0031] Furthermore, in the aforementioned three-phase winding, each branch includes two connecting wires wound on the iron core. The winding span between the starting ends of the two connecting wires is 5 slots. In each branch, the two connecting wires are connected together sequentially through the span 3 according to the arrangement order of their respective starting ends.

[0032] In detail, one winding span of connecting wire 21 is 4 slots, and this winding span is called winding span one. The stator slot wound first among the two stator slots arranged according to winding span one is designated as reference slot one, and the other as reference slot two. Other winding spans of connecting wire 21 outside of winding span one are 5 slots. When connecting wire 21 is wound in the wire layers in stator slots other than reference slot one and reference slot two, it is arranged sequentially from the outside to the inside. The number of wire layers wound by connecting wire 21 in reference slot one and reference slot two is the same. In this embodiment, the aforementioned winding span refers to the number of stator slots between two adjacent stator slots wound by the same connecting wire.

[0033] The stator slot of the adjacent reference slot 1, where connecting wire 22 is wound, is designated as reference slot 3. The span of the cross wire connected to connecting wire 2 in reference slot 3 is 6 slots, which is designated as winding span 2. The other winding spans of connecting wire 22 outside of winding span 2 are 5 slots. The number of wire layers of connecting wire 21 wound in reference slot 3 is the same as the number of wire layers passing through the stator slot corresponding to winding span 2. When connecting wire 22 is wound in reference slot 3 and through the stator slot corresponding to winding span 2, the wire layers are arranged sequentially from the outside to the inside. The starting end of connecting wire 21 naturally forms a first lead-out end, and the starting end of connecting wire 22 naturally forms a second lead-out end.

[0034] It should be noted that all connecting wires and all cross wires 3 are conventionally used wires in the field of motors, such as flat copper wires. Preferably, the flat copper wires used in this embodiment have a flat elliptical cross-section compared to conventional round copper wires.

[0035] Furthermore, in the aforementioned U-phase winding, the four parallel branches correspond to branches U1, U2, U3, and U4, respectively. The first and second leads of branch U1 correspond to U1+ and U1-, respectively; the first and second leads of branch U2 correspond to U2+ and U2-, respectively; the first and second leads of branch U3 correspond to U3+ and U3-, respectively; and the first and second leads of branch U4 correspond to U4+ and U4-, respectively.

[0036] like Figure 1-3As shown, in the U1 branch of the U-phase winding, the starting end of the connecting line 21 is located in the h-line layer of the 21st slot. The two positioning slots corresponding to the span 1 on the connecting line 21 are the 21st slot and the 16th slot, respectively, and are wound in the h-line layer of the 21st slot and the 16th slot. Then, the winding span of the connecting line 21 below is 5 slots. The connecting line 21 of the 16th slot is connected to the g-line layer of the 22nd slot through the cross wire 11. The connecting line 21 of the 22nd slot is connected to the f-line layer of the 28th slot through the cross wire 11, and so on, thereby realizing the winding of the connecting line 21. The starting point of connecting wire 22 is located at the g-line layer of slot 27. Connecting wire 22 then connects to the f-line layer of slot 33 via crossover wire 11, and then to the e-line layer of slot 39 via crossover wire 11, and so on, thus completing the layout of connecting wire 22. After connecting wire 22 winds to the h-line layer of slot 15, it connects to the h-line layer of slot 22 via crossover wire 11, at which point the winding span is 6 slots. In this embodiment, reference slot one is slot 21, reference slot two is slot 16, and reference slot three is slot 22.

[0037] In this embodiment, the first lead-out end is one end led out from the h-line layer of the 21st slot, and the second lead-out end is one end led out from the g-line layer of the 27th slot. That is, U1- is one end led out from the h-line layer of the 21st slot, and U1+ is one end led out from the g-line layer of the 27th slot.

[0038] In the U2 branch of the U-phase winding, the starting end of connecting line 21 is located in the f-line layer of slot 21. Connecting line 21 is connected to the g-line layer of slot 15 through crossover line 3, and then connected to the h-line layer of slot 9 through crossover line 3. Then, according to the winding span 1, it is connected to the h-line layer of slot 4 through crossover line 3. At this time, slot 1 is the reference slot 9, and slot 2 is the reference slot 4. Then, according to the winding span of slot 5, it is connected to the g-line layer of slot 10 through crossover line 3. Then, according to the winding span of slot 5, it is laid out in sequence, and the line layers are wound in a progressive manner from the outside to the inside. The starting point of connecting line 22 is located at the e-line layer of slot 27. It connects to the d-line layer of slot 33 via a crossover line, and then connects to the c-line layer of slot 39 via a crossover line, and so on, to complete the layout of connecting line 22. After connecting line 22 winds to the h-line layer of slot 10, it connects to the h-line layer of slot 3 via a crossover line 11. At this point, the winding span is 6 slots. In this embodiment, reference slot one is slot 9, reference slot two is slot 4, and reference slot three is slot 10.

[0039] In this embodiment, the first lead-out end is one end led out from the f-line layer of the 21st slot, and the second lead-out end is one end led out from the e-line layer of the 27th slot. That is, U2- is one end led out from the f-line layer of the 21st slot, and U2+ is one end led out from the e-line layer of the 27th slot.

[0040] It is worth mentioning that the logic of the connection and wiring methods for the U-phase winding branches U2, U3, and U4 is the same as that for the U1 branch, and therefore will not be described further. Specifically, in the U3 branch, the first lead-out end is one end of the d-line layer of slot 21, and the second lead-out end is one end of the c-line layer of slot 27. That is, U3- is one end of the d-line layer of slot 21, and U3+ is one end of the c-line layer of slot 27. In the U4 branch, U4- is one end of the b-line layer of slot 21, and U4+ is one end of the a-line layer of slot 27.

[0041] To elaborate further, such as Figure 3 As shown, U1-, U2-, U3- and U4- together form U-, and U1+, U2+, U3+ and U4+ together form U+. That is, U- is the negative terminal of the U-phase winding, and U+ is the positive terminal of the U-phase winding.

[0042] Furthermore, the logic of the wiring connection of each branch of the V-phase winding and W-phase winding is the same as that of the wiring connection of the U1 branch of the U-phase winding, so it will not be described in detail here.

[0043] like Figure 4-5 As shown, in the V-phase winding, the first leads of the four branches correspond to V1-, V2-, V3-, and V4-, respectively, and the second leads of the four branches correspond to V1+, V2+, V3+, and V4+, respectively. V1-, V2-, V3-, and V4- correspond to the ends of the h, f, d, and b lines of slot 25, respectively, while V1+, V2+, V3+, and V4+ correspond to the ends of the g, e, c, and a lines of slot 31, respectively. V1-, V2-, V3-, and V4- together form V-, and V1+, V2+, V3+, and V4+ together form V+. That is, V- is the negative terminal of the V-phase winding, and V+ is the positive terminal of the V-phase winding.

[0044] like Figure 6-7 As shown, in the W-phase winding, the first leads of the four branches correspond to W1-, W2-, W3-, and W4-, respectively, and the second leads of the four branches correspond to W1+, W2+, W3+, and W4+, respectively. W1-, W2-, W3-, and W4- correspond to the ends of the h, f, d, and b lines of slot 29, respectively, while W1+, W2+, W3+, and W4+ correspond to the ends of the g, e, c, and a lines of slot 35, respectively. W1-, W2-, W3-, and W4- together form W-, and W1+, W2+, W3+, and W4+ together form W+. That is, W- is the negative terminal of the W-phase winding, and W+ is the positive terminal of the W-phase winding.

[0045] This utility model discloses a full-pitch winding stator in which the first lead-out end of each of the four branches of each phase winding is led out from the same stator slot, and the second lead-out end is led out from the same stator slot, so that each phase has only two stator slots with lead-out ends, thereby simplifying the wiring and making the wiring neater.

[0046] The above description is only a preferred embodiment of this invention. All equivalent changes and modifications made within the scope of the claims of this utility model shall fall within the scope of the claims of this utility model.

Claims

1. A kind of whole pitch winding stator, including core and stator winding wound on the core, 48 stator slots are arranged on the core, a plurality of wire layers are respectively arranged in each stator slot, each wire layer in each stator slot is sequentially arranged from inside to outside along radial direction, and the stator winding is three-phase winding;Characterized in that: Each phase winding comprises 4 parallel branches, each branch comprising a first outgoing end and a second outgoing end, the first outgoing end of each branch of the same phase being connected to different wire layers in the same stator slot, the second outgoing end of each branch of the same phase being connected to different wire layers in the same stator slot, the first outgoing end and the second outgoing end being led out of different stator slots.

2. A cylinder-concentrated pole type stator of a cylinder-concentrated pole type motor according to claim 1, wherein: Each branch of the three-phase winding comprises two connection wires wound on the iron core, the winding span between the starting ends of the two connection wires being 5 slots, and the two connection wires in each branch being connected in turn by cross wires according to the arrangement order of the respective starting ends.

3. A cylinder-concentrated stator of a whole pitch winding as defined in claim 2, characterized in that: In each branch, the two connection wires correspond to connection wire one and connection wire two, the winding span of the connection wire one is 4 slots, and the winding span is winding span one, the other winding spans of the connection wire one are 5 slots, the stator slot where the connection wire one is wound according to the winding span one is referred to as reference slot one, and the other is referred to as reference slot two; when the connection wire one is wound in the wire layers of the other stator slots other than the reference slot one and the reference slot two, it is arranged in turn from outside to inside; wherein the number of layers of the wire layers where the connection wire one is wound in the reference slot one and the reference slot two is the same.

4. A cylinder-concentrated stator of a whole pitch winding as defined in claim 3, characterized in that: The stator slot where the connection wire two is wound adjacent to the reference slot one is referred to as reference slot three, the winding span of the cross wire connected to the connection wire two in the reference slot three is 6 slots, which is referred to as winding span two, the other winding spans of the connection wire two are 5 slots, and the number of layers of the wire layers where the connection wire two is wound in the reference slot three and the number of layers of the wire layers in the stator slots corresponding to the winding span two are the same; wherein the connection wire two is arranged in turn from outside to inside when it is wound in the wire layers in the reference slot three and the stator slots corresponding to the winding span two; The starting end of the connection wire one forms the first outgoing end, and the starting end of the connection wire two forms the second outgoing end.

5. A cylinder-concentrated stator of a cylinder-concentrated machine according to any one of claims 2-4, characterized in that: Each connection wire and each cross wire is a flat copper wire.

6. A cylinder-concentrated stator of an integer-pole winding characterized in that: The flat copper wire conductor in each stator slot has 8 layers, and the 8 layers of flat copper wire conductors in each stator slot are arranged in turn from inside to outside as a, b, c, d, e, f, g, and h along the radial direction.

7. A cylinder-concentrated stator of an integer-pole winding characterized in that: Taking one of the stator slots as the starting point, each stator slot is numbered in turn from the 1st slot to the 48th slot in the counterclockwise direction, i.e., the 48 stator slots are in turn the 1st slot, the 2nd slot, the 3rd slot,..., the 47th slot, and the 48th slot. The three-phase windings correspond to U-phase windings, V-phase windings and W-phase windings respectively, the first lead-out ends of the branches in the U-phase windings correspond to one end of the h, f, d and b wire layers led out from the 21st slot respectively, the second lead-out ends of the branches in the U-phase windings correspond to one end of the g, e, c and a wire layers led out from the 27th slot respectively; the first lead-out ends of the branches in the V-phase windings correspond to one end of the h, f, d and b wire layers led out from the 25th slot respectively, the second lead-out ends of the branches in the U-phase windings correspond to one end of the g, e, c and a wire layers led out from the 31st slot respectively; the first lead-out ends of the branches in the W-phase windings correspond to one end of the h, f, d and b wire layers led out from the 29th slot respectively, the second lead-out ends of the branches in the U-phase windings correspond to one end of the g, e, c and a wire layers led out from the 35th slot respectively.

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