A stator assembly and a motor to which it is applied

Abstract

The present invention provides a stator assembly and a motor using the same. The stator assembly includes: a stator core having stator slots, and the stator slots include a plurality of slot layers; and a stator winding inserted into the stator slots. The stator winding includes a plurality of stacked conductor groups, a plurality of full-pitch wave windings, a plurality of long-pitch wave windings, and a plurality of short-pitch wave windings. Among them, the bending portion of the stacked conductor group near the stator slot opening is characterized as the first connection portion, and the bending portion of the stacked conductor group near the stator slot bottom is characterized as the second connection portion. In each branch of each phase winding, each pole of one branch includes two stacked conductor groups. The two stacked conductor groups under the same pole are circumferentially offset by one stator slot, and the two stacked conductor groups under the same pole are located in the same slot layer in the radial direction. The present invention reduces the complexity of the manufacturing process, reduces the production cost, simplifies the wiring method of the winding, thereby simplifies the process and improves the processing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of motors, and particularly to a stator assembly and a motor using the same. Background Art

[0002] Applying a drive motor with a flat wire winding to a new energy vehicle enables the new energy vehicle to have advantages such as light weight and high power efficiency. The drive motor with a flat wire winding has gradually become the development direction of new energy vehicles. The coils of the chain winding of the existing AC motor are continuously wound by a winding mold, and the coils are connected by jumper wires. However, it is only suitable for ordinary round copper wire windings, and the number of winding layers is limited to one layer and cannot be applied to multi-layer flat wire windings. In addition, in Chinese patents CN202010580783.0 and CN201810850677.2, the twist slot pitches of the welding ends of the flat wire coils are inconsistent, resulting in a complex manufacturing process, low processing efficiency, and due to the presence of jumper wires, the number of solder joints is increased, the reliability is low, and the production cost is high. Summary of the Invention

[0003] The present invention provides a stator assembly and a motor using the same, which can solve the problem that the twist slot pitches of the welding ends of the flat wire coils are inconsistent when the existing chain winding is wound with flat wire coils, and the following technical solutions can be proposed.

[0004] The present invention provides a stator assembly, including:

[0005] A stator core having stator slots, wherein the stator slots include a plurality of slot layers; and

[0006] A stator winding inserted into the stator slots, the stator winding including a plurality of stacked conductor groups, a plurality of full-pitch wave conductors, a plurality of long-pitch wave conductors, and a plurality of short-pitch wave conductors;

[0007] Wherein, the bending portion of the stacked conductor group near the stator slot opening is characterized as a first connection portion, and the bending portion of the stacked conductor group near the stator slot bottom is characterized as a second connection portion. In each branch of each phase winding, two stacked conductor groups are included under each pole of one branch, and the two stacked conductor groups under the same pole are circumferentially different by one stator slot, and the two stacked conductor groups under the same pole are located in the same slot layer in the radial direction;

[0008] In each branch of each phase winding, a long-pitch wave conductor, a short-pitch wave conductor, or a full-pitch wave conductor is connected between the first connection portion under one pole and the second connection portion under the circumferentially adjacent other pole;

[0009] In each branch of each phase winding, between two circumferentially adjacent magnetic poles of one branch, the short-pitch wave-wound conductor is connected between the circumferentially adjacent stacked-wound conductor groups, and the long-pitch wave-wound conductor is connected between the circumferentially distant stacked-wound conductor groups. In the remaining two circumferentially adjacent magnetic poles of one branch, the full-pitch wave-wound conductor is connected between the stacked-wound conductor groups located on the same circumferential side under the two magnetic poles.

[0010] In an embodiment of the present invention, one stacked-wound conductor group includes two stacked-wound conductors. The bent portions of the two stacked-wound conductors close to each other are connected, and the bent portions of the two stacked-wound conductors away from each other are respectively a first connection portion and a second connection portion.

[0011] In an embodiment of the present invention, one stacked-wound conductor is radially different by one slot layer.

[0012] In an embodiment of the present invention, the pitch of the full-pitch wave-wound conductor, the long-pitch wave-wound conductor, the short-pitch wave-wound conductor, and the stacked-wound conductor are respectively characterized as y1, y2, y3, y4, and the pole pitch of the stator winding is characterized as τ, where y1 = τ, y2 = τ + 1, y3 = τ - 1, and y4 = τ.

[0013] In an embodiment of the present invention, in each branch of each phase winding, under two circumferentially adjacent magnetic poles, the stacked-wound conductor groups in the same circumferential slot layer are circumferentially different by L1 stator slots, and L1 = 2τ - 1.

[0014] In an embodiment of the present invention, each phase winding includes two branches. The outgoing ends of the two branches are circumferentially different by one stator slot, and the lead ends of the two branches are circumferentially different by 2τ - 1 stator slots.

[0015] In an embodiment of the present invention, each phase winding includes at least two branches. The winding directions of the two branches of the same phase winding are opposite, and the two branch windings are connected in series or in parallel.

[0016] In an embodiment of the present invention, under the circumferentially adjacent magnetic poles of the same phase winding, located in the same radial stator slot, the stacked-wound conductor group of one branch is radially different by one slot layer from the stacked-wound conductor group of the other branch.

[0017] In an embodiment of the present invention, in each branch of each phase winding, under one magnetic pole of one branch, a bent portion of the full-pitch wave-wound conductor close to the second connection portion and the second connection portion of one stacked-wound conductor group are the lead-out ends;

[0018] The other bent portion of the full-pitch wave-wound conductor under the magnetic pole is connected to the circumferentially adjacent other stacked-wound conductor group, and the second connection portion of the other stacked-wound conductor group under the magnetic pole is connected to the other full-pitch wave-wound conductor.

[0019] The present invention can also provide a motor, including the stator assembly as described in any one of the above.

[0020] The present invention provides a stator assembly and a motor using the same. The present invention reduces the complexity of the manufacturing process, reduces the production cost, simplifies the wiring method of the winding, thus simplifies the process and improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a stator assembly of the present invention.

[0022] Figure 2 It is a wiring diagram of a phase winding in a stator assembly of the present invention.

[0023] Figure 3 It is a developed view of a branch of a phase winding in a stator assembly of the present invention.

[0024] Figure 4 It is a developed view of another branch of a phase winding in a stator assembly of the present invention.

[0025] Figure 5 It is a schematic structural diagram of a stator winding in a stator assembly of the present invention.

[0026] Figure 6 It is Figure 5 an enlarged schematic view at A in

[0027] Figure 7 It is a schematic structural diagram of a wave-wound coil group in a stator assembly of the present invention.

[0028] Figure 8 It is Figure 7 an enlarged schematic view at B in

[0029] Figure 9 It is a schematic structural diagram of a full-pitch wave-wound conductor in a stator assembly of the present invention.

[0030] Figure 10 It is a schematic structural diagram of a long-pitch wave-wound conductor in a stator assembly of the present invention.

[0031] Figure 11 It is a schematic structural diagram of a short-pitch wave-wound conductor in a stator assembly of the present invention.

[0032] Figure 12 It is a schematic structural diagram of a lap-wound coil group in a stator assembly of the present invention.

[0033] Figure 13 It is Figure 12 an enlarged schematic view at C in

[0034] Figure 14Schematic diagram of the stacked conductor group in a stator assembly of the present invention.

[0035] Figure 15 Schematic diagram of the first stacked conductor in a stator assembly of the present invention.

[0036] Figure 16 Schematic diagram of the second stacked conductor in a stator assembly of the present invention.

[0037] Figure 17 Schematic diagram of the chain coil group in a stator assembly of the present invention.

[0038] Figure 18 Wiring diagram of a phase winding in another embodiment of a stator assembly of the present invention.

[0039] In the figure: 100, stator winding; 1001, hairpin end; 1002, welding end;

[0040] 110, wave-wound coil group; 111, full-pitch wave-wound conductor; 112, long-pitch wave-wound conductor;

[0041] 113, short-pitch wave-wound conductor;

[0042] 120, stacked coil group; 121, stacked conductor group; 122, first stacked conductor;

[0043] 123, second stacked conductor;

[0044] 101, head; 102, first straight section; 103, second straight section;

[0045] 104, first bending part; 105, second bending part;

[0046] 200, stator core. Detailed implementation mode

[0047] The following uses specific specific examples to illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0048] It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components during actual implementation. The type, quantity, and ratio of each component during actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0049] Please refer to Figures 1 - 18 , the present invention provides a stator assembly and a motor using the same, which can be applied to the fields of electric servo drive, transportation, etc. For example, the stator assembly and the motor using the same in this application can be applied to electric vehicles. The invention of this application has the advantages of consistent pitch of the welding end twist, reducing the complexity of the manufacturing process, improving the processing efficiency, and reducing the production cost. The present invention will be described in detail through specific embodiments below.

[0050] Please refer to Figure 1 As shown, in some embodiments, the present invention provides a stator assembly, which may include a stator winding 100 and a stator core 200. The stator winding 100 may include a plurality of phase windings, and the plurality of phase windings are different from each other in electrical phase. For example, the stator winding 100 may include three phase windings. Each phase winding may include two branches, and the two branches may be connected in series or in parallel. The stator core 200 may be provided with a plurality of stator slots, and the stator slots may be formed on the inner wall of the stator core 200. The stator slots may be arranged along the circumferential direction of the inner wall of the stator core 200, and the stator slots may be spaced apart from each other on the stator core 200 at a predetermined stator slot interval. The upper and lower end faces of the stator core 200 may be defined as a hairpin end 1001 and a welding end 1002 respectively. The stator winding 100 may be inserted into the stator core 200 from the side of the hairpin end 1001, and the stator winding 100 may be welded at the welding end 1002.

[0051] Please refer to Figures 1 - 4 As shown, in some embodiments, the plurality of stator slots in the circumferential direction of the stator core 200 may be respectively defined as the No. 1 stator slot, the No. 2 stator slot, the No. 3 stator slot, the No. 4 stator slot,.... For example, the stator core 200 may be provided with 48 stator slots along the circumferential direction. Among them, each stator slot may be provided with a plurality of slot layers, and each stator slot may be provided with an even number of slot layers. For example, each stator slot may be provided with 6 slot layers. For example, the 6 slot layers may be successively the first layer slot layer, the second layer slot layer, the third layer slot layer, the fourth layer slot layer, the fifth layer slot layer, and the sixth layer slot layer along the radial direction of the stator core 200 from the inside to the outside. That is, the first layer slot layer may be located on the side close to the stator slot opening, and the sixth layer slot layer may be located on the side close to the stator slot bottom. In addition, the specific labeling of the slot layers of each stator slot is not limited. In the embodiments of the present invention, the slot layers are arranged in the order of 1 to 6 from the inside to the outside, and in other embodiments, they may also be arranged in the order of 1 to 6 from the outside to the inside.

[0052] Please refer to Figures 5 - 17As shown, in some embodiments, the stator winding 100 may include a plurality of stacked winding conductor groups 121, a plurality of full-pitch wave winding conductors 111, a plurality of long-pitch wave winding conductors 112, and a plurality of short-pitch wave winding conductors 113. Among them, in each branch of each phase winding, at least two stacked winding conductor groups may be included under one magnetic pole of a branch. A stacked winding conductor group 121 may include at least two stacked windings. A bent portion of one stacked winding is connected to a bent portion of another stacked winding. Another bent portion of one stacked winding may serve as the access end of the stacked winding conductor group 121, and another bent portion of the other stacked winding may serve as the outlet end of the stacked winding conductor group 121. The access end of the stacked winding conductor group 121 close to the stator slot opening may be characterized as the first connection portion, and the outlet end of the stacked winding conductor group 121 close to the stator slot bottom may be characterized as the second connection portion. A plurality of stacked winding conductor groups 121 may form a stacked winding coil group 120. In each branch of each phase winding, between two circumferentially adjacent magnetic poles of a branch, a full-pitch wave winding conductor 111 or a long-pitch wave winding conductor 112 or a short-pitch wave winding conductor 113 may be connected between the first connection portion under one magnetic pole and the second connection portion under another magnetic pole. A plurality of full-pitch wave winding conductors 111, a plurality of long-pitch wave winding conductors 112, and a plurality of short-pitch wave winding conductors 113 may form a wave winding coil group 110. The stacked winding coil group 120 and the wave winding coil group 110 may form a chain-type coil group.

[0053] Please refer to Figures 7 - 11 As shown, in some embodiments, the full-pitch wave winding conductor 111, the long-pitch wave winding conductor 112, and the short-pitch wave winding conductor 113 may include a head, two straight segment portions, and two bent portions. Among them, one end of a head is respectively connected to a straight segment portion. The two straight segment portions pass through the stator slots of the stator core 200 and twist at the welding end 1002 to form two bent portions. The two bent portions of the full-pitch wave winding conductor 111, the long-pitch wave winding conductor 112, and the short-pitch wave winding conductor 113 extend the same distance along one side of the welding end 1002 of the stator core 200, and may be equal to half of the pole pitch. For example, the full-pitch wave winding conductor 111, the long-pitch wave winding conductor 112, and the short-pitch wave winding conductor 113 may include a head 101, a first straight segment portion 102, a second straight segment portion 103, a first bent portion 104, and a second bent portion 105. Among them, the first straight segment portion 102 and the second straight segment portion 103 may be used to insert into different stator slots. One end of the first straight segment portion 102 may be connected to the first bent portion 104, and one end of the second straight segment portion 103 may be connected to the second bent portion 105. The other end of the first straight segment portion 102 and the other end of the second straight segment portion 103 may be connected to the head 101.

[0054] Please refer to Figures 7 - 11As shown, in each branch of each phase winding, the two straight section parts of the full-pitch wave-wound conductor 111, the long-pitch wave-wound conductor 112, and the short-pitch wave-wound conductor 113 can be radially different by five slot layers. Characterize the pitch of the full-pitch wave-wound conductor 111 as y1, and characterize the pole pitch of the stator winding as τ. For example, y1 = τ. Characterize the pitch of the long-pitch wave-wound conductor 112 as y2, and y2 can be greater than the pole pitch of the stator winding. For example, y2 = τ + 1. Characterize the pitch of the short-pitch wave-wound conductor 113 as y3, and y3 can be less than the pole pitch of the stator winding. For example, y3 = τ - 1.

[0055] Please refer to Figures 7 - 11 As shown, in some embodiments, the first bending part 104 and the second bending part 105 in the full-pitch wave-wound conductor 111, the long-pitch wave-wound conductor 112, and the short-pitch wave-wound conductor 113 can be away from each other, and the first bending part 104 and the second bending part 105 in the full-pitch wave-wound conductor 111, the long-pitch wave-wound conductor 112, and the short-pitch wave-wound conductor 113 can extend in opposite directions. For example, the extending direction of multiple first bending parts 104 can be along the clockwise direction or the counterclockwise direction, and the extending direction of multiple second bending parts 105 is opposite.

[0056] Please refer to Figures 12 - 16 As shown, in some embodiments, the number of radial slot layers occupied by the lap-wound coil group 120 in the stator core 200 is not limited, and the number of radial slot layers occupied by the lap-wound coil group 120 in the stator core 200 can be an even number. For example, the number of radial slot layers occupied by the lap-wound coil group 120 in the stator core 200 can be four layers, that is, the lap-wound coil group 120 can be composed of two lap-wound conductors. Since the stator core 200 is in the shape of a hollow circular cylinder, for the middle-layer conductors with the same pitch, the size of the lap-wound conductor near the stator slot opening is smaller, and the size of the lap-wound conductor near the stator slot bottom is larger. The lap-wound conductor near the stator slot opening can be defined as the first lap-wound conductor 122, and the lap-wound conductor near the stator slot bottom can be defined as the second lap-wound conductor 123. The pitches of the first lap-wound conductor 122 and the second lap-wound conductor 123 can be the same. In each branch of each phase winding, the circumferential stator slots occupied by the first lap-wound conductor 122 and the second lap-wound conductor 123 are the same, that is, the first straight section part 102 of the first lap-wound conductor 122 and the first straight section part 102 of the second lap-wound conductor 123 are located in the same circumferential stator slot, and the second straight section part 103 of the first lap-wound conductor 122 and the second straight section part 103 of the second lap-wound conductor 123 are located in the same circumferential stator slot. Among them, the symmetry axes of the first lap-wound conductor 122 and the second lap-wound conductor 123 can be the same.

[0057] Please refer to Figures 12 - 16As shown, in some embodiments, the overlapping conductor group 121 may include at least two overlapping conductors. The first overlapping conductor 122 and the second overlapping conductor 123 may include a head 101, a first straight segment portion 102, a second straight segment portion 103, a first bending portion 104, and a second bending portion 105. Among them, the first straight segment portion 102 and the second straight segment portion 103 may be used to insert into the stator slots, and the first straight segment portion 102 and the second straight segment portion 103 may be inserted into different stator slots. One end of the first straight segment portion 102 may be connected to the first bending portion 104, and one end of the second straight segment portion 103 may be connected to the second bending portion 105. The head 101 may be connected between the other ends of the first straight segment portion 102 and the second straight segment portion 103. In each branch of each phase winding, the two straight segment portions of the first overlapping conductor 122 and the second overlapping conductor 123 may be radially different by one slot layer. The pitch of the first overlapping conductor 122 and the second overlapping conductor 123 is characterized as y4, for example, y4 = τ.

[0058] Please refer to Figures 12 - 16 As shown, in some embodiments, the first bending portion 104 and the second bending portion 105 in the first overlapping conductor 122 and the second overlapping conductor 123 may be close to each other, and the first bending portion 104 and the second bending portion 105 in the first overlapping conductor 122 and the second overlapping conductor 123 may extend in opposite directions. For example, the extending direction of multiple first bending portions 104 may be along the clockwise direction or the counterclockwise direction, and the extending direction of multiple second bending portions 105 is opposite.

[0059] Please refer to Figures 2 - 4 As shown, in some embodiments, in each branch of each phase winding, each pole of a branch may include two overlapping conductor groups 121. The two overlapping conductor groups 121 under the same pole are circumferentially different by one stator slot, and the two overlapping conductor groups under the same pole are located in the same slot layer radially.

[0060] Please refer to Figures 2 - 4As shown, in some embodiments, under two circumferentially adjacent magnetic poles of a branch, a short-pitch wave-wound conductor 113 is connected between circumferentially adjacent stacked winding conductor groups 121. For example, the short-pitch wave-wound conductor 113 is connected between a bent portion of the 16th stator slot and a second connection portion of the stacked winding conductor group 121 in the 10th stator slot, and the short-pitch wave-wound conductor 113 is connected between another bent portion of the 21st stator slot and a first connection portion of the stacked winding conductor group 121 in the 27th stator slot. A long-pitch wave-wound conductor 112 is connected between stacked winding conductor groups 121 that are far apart circumferentially. For example, the long-pitch wave-wound conductor 112 is connected between a bent portion of the 15th stator slot and a second connection portion of the stacked winding conductor group 121 in the 9th stator slot, and the long-pitch wave-wound conductor 112 is connected between another bent portion of the 22nd stator slot and a first connection portion of the stacked winding conductor group 121 in the 28th stator slot. Under the remaining two circumferentially adjacent magnetic poles of a branch, a full-pitch wave-wound conductor 111 is connected between stacked winding conductor groups 121 on the same circumferential side under the two magnetic poles. For example, the full-pitch wave-wound conductor 111 is connected between a bent portion of the 39th stator slot and the stacked winding conductor group 121 in the 33rd stator slot, and the full-pitch wave-wound conductor 111 is connected between another bent portion of the 45th stator slot and the stacked winding conductor group 121 in the 3rd stator slot. The full-pitch wave-wound conductor 111 is connected between a bent portion of the 40th stator slot and the stacked winding conductor group 121 in the 34th stator slot, and the full-pitch wave-wound conductor 111 is connected between another bent portion of the 46th stator slot and the stacked winding conductor group 121 in the 4th stator slot.

[0061] Please refer to Figures 2 - 4 As shown, in some embodiments, in each branch of each phase winding, under a magnetic pole in a branch, a bent portion of the full-pitch wave-wound conductor 111 close to the second connection portion and a second connection portion of a stacked winding conductor group 121 are the lead-out ends. The other bent portion of the full-pitch wave-wound conductor 111 under this magnetic pole is connected to a circumferentially adjacent stacked winding conductor group 121, and the second connection portion of the other stacked winding conductor group 121 under this magnetic pole is connected to another full-pitch wave-wound conductor 111.

[0062] Please refer to Figures 1 - 16 As shown, in some embodiments, in each branch of each phase winding, when y1 = τ, y2 = τ + 1, y3 = τ - 1, y4 = τ, under two circumferentially adjacent magnetic poles, the stator slots by which the stacked winding conductor groups 121 in the same slot layer differ circumferentially is L1, and L1 = 2τ - 1. For example, when τ = 6, y1 = 6, y2 = 7, y3 = 6, y4 = 6, and L1 = 11.

[0063] Please refer to Figures 1 - 16As shown, in some embodiments, the heads 101 of the full-pitch wave-wound conductor 111, the long-pitch wave-wound conductor 112, the short-pitch wave-wound conductor 113, the first stacked-wound conductor 122, and the second stacked-wound conductor 123 are located on the same side. One end of the stator winding 100 located at the head 101 is the hairpin end 1001. One end of the stator winding 100 located away from the head 101 is the welding end 1002.

[0064] Please refer to Figures 1 - 16 As shown, in some embodiments, by winding in this way, the winding structure of each phase winding of the stator winding 100 can be optimized. This winding method can arrange the incoming line ends and outgoing line ends of each branch on the same side hairpin end 1001 of the stator winding 100, and can make full use of the height of the hairpin end 1001. The outgoing line ends of the two branches are circumferentially different by one stator slot at the hairpin end 1001, which makes it convenient to weld the incoming line ends of the two branches. Similarly, the incoming line ends of the two branches are located at the hairpin end 1001, which is convenient for welding.

[0065] Please refer to Figures 2 - 4 As shown, in some embodiments, in order to more clearly express the wiring structure of the present invention, the A-phase coil group is described as an example in the winding expansion diagram. Only the winding of the A-phase coil group is drawn in the winding expansion diagram, and it does not involve the B-phase and C-phase coil groups. The winding methods of the B-phase coil group and the C-phase coil group are the same as that of the A-phase coil group, and the only difference lies in the slot numbers of the stator slots where the incoming line ends and outgoing line ends are located. For example, the incoming line ends of the A-phase winding are the 16th stator slot and the 27th stator slot respectively, the incoming line ends of the B-phase winding can be the 20th stator slot and the 31st stator slot, and the incoming line ends of the C-phase winding can be the 24th stator slot and the 35th stator slot.

[0066] Please refer to Figures 2 - 16 As shown, in some embodiments, the stator winding 100 may include three-phase windings, and each phase winding may include two branches. The following refers to Figures 2 - 4 to describe the specific embodiments of the present invention in detail. For example, each branch winding may include 8 magnetic poles, the pole pitch of the stator winding 100 may be 6 stator slots, that is, τ = 6, the number of slots per pole per phase is 2, and the number of slot layers L of the stator winding 100 is 6. Among them, the expansion diagram of the A-phase winding is as Figure 2 shown. Figure 3 In [reference], A1X1 is the first branch of the A-phase winding, Figure 4 in [reference], A2X2 is the second branch of the A-phase winding, A1, A2, X1, and X2 are the lead-out ends of the winding, A1 and A2 are the incoming line ends of the winding, and X1 and X2 are the outgoing line ends of the winding. In each stator slot of the winding expansion diagram, from left to right, they are the 6th layer, 5th layer, 4th layer, 3rd layer, 2nd layer, and 1st layer in sequence. Figure 3In the first branch A1X1, the winding is in the positive direction. Figure 4 In the second branch A2X2, the winding is in the reverse direction. Under the circumferentially adjacent magnetic poles of the same-phase winding and in the same stator slots radially, the stacked winding conductor groups 121 of one branch are radially offset by one slot layer from the stacked winding conductor groups 121 of the other branch.

[0067] Please refer to Figures 2 - 4 As shown, in some embodiments, the specific winding method of the first branch A1X1 of the A-phase winding is as follows. For example, 27(6) represents the 6th layer of the 27th stator slot.

[0068] A1 -> 27(6) -> 33(1) -> 39(2) -> 33(3) -> 39(4) -> 33(5) -> 39(6) -> 45(1) -> 3(2) -> 45(3) -> 3(4) -> 45(5) -> 3(6) -> 9(1) -> 15(2) -> 9(3) -> 15(4) -> 9(5) -> 15(6) -> 22(1) -> 28(2) > 22(3) -> 28(4) -> 22(5) -> 28(6) -> 34(1) -> 40(2) -> 34(3) -> 40(4) -> 34(5) -> 40(6) -> 46(1) -> 4(2) -> 46(3) -> 4(4) -> 46(5) -> 4(6) -> 10(1) -> 16(2) -> 10(3) -> 16(4) -> 10(5) -> 16(6) -> 21(1) -> 27(2) -> 21(3) -> 27(4) -> 21(5) -> X1.

[0069] The specific winding method of the second branch A2X2 of the A-phase winding is as follows. For example, 22(6) represents the 6th layer of the 22nd stator slot.

[0070] X2 <- 22(6) <- 28(1) <- 34(2) <- 28(3) <- 34(4) <- 28(5) -> 34(6) <- 40(1) <- 46(2) <- 40(3) <- 46(4) <- 40(5) -> 46(6) <- 4(1) <- 10(2) <- 4(3) <- 10(4) <- 4(5) -> 10(6) <- 15(1) <- 21(2) <- 15(3) <- 21(4) <- 15(5) -> 21(6) <- 27(1) <- 33(2) <- 27(3) <- 33(4) <- 27(5) -> 33(6) <- 39(1) <- 45(2) <- 39(3) <- 45(4) <- 39(5) -> 45(6) <- 3(1) <- 9(2) <- 3(3) <- 9(4) <- 3(5) -> 9(6) <- 16(1) <- 22(2) <- 16(3) <- 22(4) <- 16(5) <- A2.

[0071] Please refer to Figures 2 - 4 As shown, in some embodiments, from the above winding method, it can be seen that the outlet ends X1 and X2 of the first branch A1X1 and the second branch A2X2 are circumferentially different by one stator slot, and the outlet ends X1 and X2 of the first branch A1X1 and the second branch A2X2 are radially different by one slot layer. When y1 = τ, y2 = τ + 1, y3 = τ - 1, y4 = τ, the lead ends A1 and A2 of the two branch windings are circumferentially different by 2τ - 1 stator slots, and the lead ends A1 and A2 of the two branch windings are radially different by one slot layer. For example, when y1 = 6, y2 = 7, y3 = 5, y4 = 6, and L1 = 11, the lead ends of the two branch windings are circumferentially different by 11 stator slots.

[0072] Please refer to Figures 2 - 4 As shown, in some embodiments, the lead end A1 and the outlet end X1 of the first branch are circumferentially different by 6 stator slots, and the lead end A1 and the outlet end X1 of the first branch are radially different by 1 slot layer. The lead end A2 and the outlet end X2 of the second branch are circumferentially different by 6 stator slots, and the lead end A2 and the outlet end X2 of the second branch are radially different by 1 slot layer. It should be noted that "difference" can refer to the difference between two slot numbers. For example, there is a difference of 6 stator slots between the 3rd stator slot and the 9th stator slot. In addition, "difference" can also refer to the difference between two slot layers. For example, there is a difference of 3 slot layers between the 1st layer slot and the 4th layer slot. In a phase winding, when the first branch and the second branch are connected in parallel, the inlet end A1 and the inlet end A2 are connected, and the outlet end X1 and the outlet end X2 are connected, so that the first branch and the second branch are connected in parallel with each other.

[0073] Please refer to Figures 2 - 4 As shown, in some embodiments, in each branch of each phase winding, the stacked winding conductor group 121 is connected by the full pitch wave winding conductor 111. When multiple stacked winding conductor groups 121 wind around the stator core 200 for one week, they are connected to the next stacked winding conductor group 121 through the long pitch wave winding conductor 112 or the short pitch wave winding conductor 113, and then continue to wind circumferentially along the stator core 200 until a complete branch is formed. Among them, in each branch of each phase winding, the number of full pitch wave winding conductors 111 is six, the number of long pitch wave winding conductors 112 is one, and the number of short pitch wave winding conductors 113 is one.

[0074] Please refer to Figure 18As shown, in some other embodiments, in each branch of each phase winding, the stacked winding conductor groups 121 are alternately connected by long-pitch wave windings 112 and short-pitch wave windings 113. When multiple stacked winding conductor groups 121 wind around the stator core 200 for one week, they are connected to the next stacked winding conductor group 121 through full-pitch wave windings 111, and then continue to wind circumferentially along the stator core 200 until a complete branch is formed. Among them, in each branch of each phase winding, the number of full-pitch wave windings 111 is two, the number of long-pitch wave windings 112 is three, and the number of short-pitch wave windings 113 is three.

[0075] Please refer to Figures 1 - 18 As shown, in some embodiments, the present invention further provides a motor, which may include the above-mentioned stator assembly.

[0076] In summary, the present invention provides a stator assembly and a motor using the same. Through the arrangement of the above-mentioned windings, the twisting slot pitches of the winding welding ends are consistent, which reduces the complexity of the manufacturing process and the production cost; the jumper wire is eliminated, which simplifies the wiring method of the windings, thereby simplifying the process and improving the processing efficiency. In addition, the two parallel branches are completely symmetric in the magnetic circuit and are completely equal in electrical parameters such as resistance and inductance. There is no circulating current between the branches after parallel connection, thereby improving the efficiency of the motor and reducing the vibration and noise of the motor.

[0077] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features. It should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept, such as the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

[0078] Except for the technical features described in the specification, the remaining technical features are known to those skilled in the art. To highlight the innovative features of the present invention, the remaining technical features are not described herein again.

Claims

1. A stator assembly, characterized in that, Comprising: A stator core having stator slots, said stator slots including a plurality of slot layers; and A stator winding inserted into said stator slots, said stator winding including a plurality of stacked winding conductor groups, a plurality of full-pitch wave windings, a plurality of long-pitch wave windings, and a plurality of short-pitch wave windings; Wherein, the bending portion of the stacked winding conductor group near the stator slot opening is characterized as a first connection portion, and the bending portion of the stacked winding conductor group near the stator slot bottom is characterized as a second connection portion. In each branch of each phase winding, in each pole of a branch, there are two stacked winding conductor groups, and the two stacked winding conductor groups under the same pole are circumferentially different by one stator slot, and the two stacked winding conductor groups under the same pole are located in the same slot layer in the radial direction; In each branch of each phase winding, between the first connection portion under one pole and the second connection portion under the circumferentially adjacent other pole, there is connected the long-pitch wave winding, the short-pitch wave winding, or the full-pitch wave winding; In each branch of each phase winding, in the circumferentially two adjacent poles of a branch, between the circumferentially adjacent stacked winding conductor groups, there is connected the short-pitch wave winding, and between the circumferentially distant stacked winding conductor groups, there is connected the long-pitch wave winding. In the remaining circumferentially two adjacent poles of a branch, between the stacked winding conductor groups on the same circumferential side under the two poles, there is connected the full-pitch wave winding; In each branch of each phase winding, in one pole of a branch, the bending portion of the full-pitch wave winding near the second connection portion and the second connection portion of one of the stacked winding conductor groups are the lead-out ends; The other bending portion of the full-pitch wave winding under the said pole is connected to the circumferentially adjacent other stacked winding conductor group, and the second connection portion of the other stacked winding conductor group under the said pole is connected to another full-pitch wave winding.

2. The stator assembly according to claim 1, wherein, One of the stacked winding conductor groups includes at least two stacked windings. The bending portions of the two stacked windings that are radially close to each other are connected, and the bending portions of the two stacked windings that are radially far from each other are respectively the first connection portion and the second connection portion.

3. The stator assembly according to claim 2, characterized in that, One of the stacked windings is radially different by one slot layer.

4. The stator assembly according to claim 2, wherein The pitches of the full-pitch wave winding, the long-pitch wave winding, the short-pitch wave winding, and the stacked winding are respectively characterized as y1, y2, y3, y4, and the pole pitch of the stator winding is characterized as τ, y1 = τ, y2 = τ + 1, y3 = τ - 1, y4 = τ.

5. The stator assembly according to claim 4, characterized in that, In each branch of each phase winding, in the circumferentially two adjacent poles, the stacked winding conductor groups in the same circumferential slot layer are circumferentially different by L1 stator slots, L1 = 2τ - 1.

6. The stator assembly according to claim 4, characterized in that, Each phase winding includes two branches. The outlet ends of the two branches are circumferentially different by one stator slot, and the lead ends of the two branches are circumferentially different by 2τ - 1 stator slots.

7. The stator assembly according to claim 1, characterized in that, Each phase winding includes at least two branches. The winding directions of the two branches of the same phase winding are opposite, and the two branch windings are connected in series or in parallel.

8. The stator assembly according to claim 7, characterized in that, In the circumferentially adjacent poles of the same phase winding, located in the same radial stator slot, the stacked winding conductor groups of one branch are radially different by one slot layer from the stacked winding conductor groups of the other branch.

9. A motor, characterized in that, Including the stator assembly according to any one of claims 1 to 8.

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