Stator assembly and motor

Abstract

The utility model discloses a stator assembly and a motor, the stator assembly comprises a stator iron core, the stator iron core is provided with a plurality of stator grooves and a plurality of conductor units at the radial inner side, the plurality of conductor units are arranged in the stator grooves along the direction parallel to the axis of the stator iron core, and the conductor units are arranged in the stator grooves along the direction parallel to the axis of the stator iron core. The conductor parts of the plurality of conductor units are overlapped in the radial direction to form a plurality of conductor layers, and the first layer is a wire inlet end; the insulation part is arranged on the periphery of the first layer in a surrounding mode to form a first insulation area. By wrapping the wire inlet end of the motor with the insulating part, the influence of high voltage impact borne by the coil at the wire inlet end of the motor on other turns of coils can be effectively avoided, and the risk of insulation and voltage resistance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator component and a motor. Background Art

[0002] In recent years, in order to improve the efficiency and power density of motors, the 800V high-voltage platform has become a development trend in the new energy industry. In particular, the application of flat wire motors in electric vehicles has gradually increased. In order to make flat wire motors better adapt to the use needs of new energy vehicles, there is a demand for flat wire motors with higher performance and lower manufacturing costs.

[0003] In the related art, each layer of coils wound in the stator slots of the motor is wrapped as a whole with insulating paper. For the motor on the high-voltage platform, when the motor starts, the winding layer where the incoming end of the winding coil is located will be subjected to greater motor impact than other layers. The large voltage impact borne by this layer will affect the coils of other layers and reduce the insulation withstand voltage performance of the motor. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a stator assembly, which can effectively prevent the high voltage impact borne by the motor's inlet end coil from affecting other turns of the coil by wrapping the inlet end of the motor with an insulating component, thereby reducing the risk of insulation withstand voltage.

[0005] According to the stator assembly of the embodiment of the first aspect of the utility model, it includes: a stator core, wherein the stator core is provided with a plurality of stator slots on the radial inner side, a plurality of conductor units, wherein the plurality of conductor units are arranged in the stator slots along an axial direction parallel to the stator core, and the conductor parts of the plurality of conductor units are radially stacked to form a plurality of conductor layers and the first layer is an incoming line end; and an insulating component, wherein the insulating component is arranged around the outer periphery of the first layer to form a first insulating area.

[0006] According to the stator assembly of the embodiment of the utility model, by wrapping the incoming line end of the motor with an insulating component, the influence of the high voltage shock borne by the incoming line end coil of the motor on other turns of the coil can be effectively avoided, and the risk of insulation withstand voltage can be reduced.

[0007] According to some embodiments of the present invention, the insulating component is disposed around the periphery of the remaining conductor layers except the first layer to form a second insulating area.

[0008] According to some embodiments of the present invention, the cross-sectional shape of the insulating member includes: a first vertical end portion, which is radially disposed on one side of the multi-layer conductor layer; a second vertical end portion, which is radially disposed on the other side of the multi-layer conductor layer and is oppositely disposed to one side of the first layer; a third vertical end portion, which is radially disposed on the other side of the multi-layer conductor layer and is oppositely disposed to one side of the conductor layers other than the first layer; a first horizontal end portion, both ends of the second vertical end portion are respectively connected to one end of the first horizontal end portion, and the other end of the first horizontal end portion is connected to the first vertical end portion to enclose the first insulating region; a second horizontal end portion, both ends of the third vertical end portion are respectively connected to one end of the second horizontal end portion, and the other end of the second horizontal end portion is connected to the first vertical end portion to enclose the second insulating region.

[0009] According to some embodiments of the present invention, the first horizontal end portion adjacent to the second insulating region and the second horizontal end portion adjacent to the first insulating region are radially spaced and stacked.

[0010] According to some embodiments of the present invention, the joints of the first horizontal end portion with the first vertical end portion and the second vertical end portion are right angles or arcs; and / or, the joints of the second horizontal end portion with the first vertical end portion and the third vertical end portion are right angles or arcs.

[0011] According to some embodiments of the present invention, it further includes: a multi-phase winding, each phase winding includes a plurality of parallel branches, each of the parallel branches is wound in the stator slot, and n layers of conductor unit windings are distributed in each stator slot, n≥4, and the n layers of conductor unit windings in each parallel branch include a plurality of hairpins; wherein, each parallel branch contains p winding cycle units, each winding cycle unit uses the first layer as a starting point, the first layer uses a hairpin with a same-layer jumper, and from the second layer to the n-1 layer, (n-2) / 2 hairpins with different-layer jumpers are used, the nth layer uses a hairpin with a same-layer jumper, and from the n-1 layer to the second layer, (n-2) / 2 hairpins with different-layer jumpers are used to wind p cycles to form a branch; the conductor portion of the hairpin with a same-layer jumper at the starting point of the first layer of each parallel branch is located in the first insulating region.

[0012] According to some embodiments of the present invention, the parallel branch at least includes a first branch and a second branch, the first layer of the first branch is a first starting point, the starting point of the second branch is arranged on the first layer of the adjacent slot of the stator slot where the first starting point is located, and the winding directions of the first branch and the second branch are opposite to each other.

[0013] According to some embodiments of the present utility model, the first layer is the side close to the notch of the stator slot; or, the first layer is the side close to the bottom of the stator slot.

[0014] According to some embodiments of the present utility model, the conductor unit has two straight portions, two bent portions, and a connecting portion connecting the two straight portions, and the straight portion is the conductor portion.

[0015] The motor according to the embodiment of the second aspect of the present utility model includes the stator assembly described above.

[0016] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0018] Figure 1 is a schematic structural diagram of a plurality of conductor units and insulating components according to an embodiment of the present utility model;

[0019] Figure 2 is a schematic structural diagram of an insulating component according to an embodiment of the present utility model;

[0020] Figure 3 is a layout diagram of two parallel branches of one phase according to an embodiment of the present utility model;

[0021] Figure 4 is a partially enlarged view of the layout of two parallel branches of one phase according to an embodiment of the present utility model.

[0022] Reference Signs:

[0023] 1, stator slot; 2, conductor portion; 3, first layer; 4, insulating component; 401, first vertical end; 402, second vertical end; 403, third vertical end; 404, first horizontal end; 405, second horizontal end; 5, first insulating region; 6, second insulating region; 7, second layer; 8, third layer; 9, fourth layer; 10, fifth layer; 11, sixth layer. Detailed Embodiments

[0024] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the drawings are exemplary. The embodiments of the present utility model will be described in detail below.

[0025] Below, reference is made to Figures 1-4 to describe the stator assembly according to the embodiment of the present utility model.

[0026] As Figure 1 andFigure 2 As shown, the stator assembly includes: a stator core, a plurality of conductor units, and an insulating member 4.

[0027] The stator core is provided with a plurality of stator slots 1 on its radially inner side. The plurality of conductor units are arranged in the stator slots 1 along the axial direction of the stator core. The conductor portions 2 of the plurality of conductor units are stacked radially to form a plurality of conductor layers, and the first layer 3 is the incoming line end. The insulating member 4 is disposed around the outer periphery of the first layer 3 to form a first insulation region 5.

[0028] Specifically, the stator core is generally cylindrical and has an accommodation space for the rotor assembly to rotate inside it in the radial direction. A plurality of stator teeth are provided on the radially inner side of the stator core, and stator slots 1 are formed between two adjacent stator teeth.

[0029] Preferably, the plurality of stator slots 1 are evenly arranged in the circumferential direction. The number of stator slots 1 can be set as required.

[0030] The plurality of conductor units are inserted into the stator slots 1 along the axial direction of the stator core, so that the conductor portions 2 of the plurality of conductor units are stacked radially in the stator slots 1, forming a plurality of conductor layers. For example, in this embodiment, six conductor layers are formed, including the first layer 3, the second layer 7, the third layer 8, the fourth layer 9, the fifth layer 10, and the sixth layer 11.

[0031] Among them, the first layer 3 is the incoming line end, which can be understood as the winding layer where the incoming line end of the winding coil is located. And the insulating member 4 is disposed around the outer periphery of the first layer 3 to form a first insulation region 5 to separate it from other conductor layers. In this way, when the voltage is transmitted to the motor, a large voltage impact will be generated on the coil of the first layer 3. By using the above-mentioned insulating member 4 to surround the coil of the first layer 3, it is isolated from the coils of other conductor layers, avoiding the influence of the high voltage impact borne by the coil of the first layer 3 on the coils of other conductor layers and reducing the risk of insulation withstand voltage.

[0032] Therefore, for the stator assembly according to the embodiment of the present invention, by surrounding the insulating member 4 around the outer periphery of the first layer 3, the first layer 3 is separated from other conductor layers, effectively avoiding the influence of the high voltage impact borne by the incoming line end coil of the motor on other coils, reducing the risk of insulation withstand voltage, and improving the safety performance of the motor.

[0033] According to some embodiments of the present invention, see Figure 1 , the insulating member 4 is disposed around the outer peripheries of the remaining conductor layers except the first layer 3 to form a second insulation region 6.

[0034] With such an arrangement, the insulating member 4 also surrounds the outer periphery of the remaining conductor layers to form a second insulating region 6, further avoiding the influence of the high-voltage impact borne by the coil at the incoming line end of the motor product on the coils of other conductor layers. Moreover, compared with the isolation insulation between adjacent winding layers, which causes the insulation structure to occupy too much space in the stator slot 1, by disposing the insulating member 4 around the outer periphery of the remaining conductor layers, the filling rate of the winding coils can be increased, thereby improving the overall performance of the motor.

[0035] Furthermore, the conductor portion 2 of the conductor unit has a rectangular cross-section. Therefore, when a plurality of conductor units are inserted into the stator slot 1, they can be closely arranged with each other, which allows for a higher conductor filling degree in one stator slot 1 compared to conductors with a circular cross-section.

[0036] Based on the cross-sectional structure of the conductor portion 2 of the above-mentioned conductor unit, see Figure 2 , the cross-sectional shape of the insulating member 4 includes: a first vertical end portion 401, a second vertical end portion 402, a third vertical end portion 403, a first horizontal end portion 404, and a second horizontal end portion 405.

[0037] The first vertical end portion 401 is radially disposed on one side of the multi-layer conductor layer, the second vertical end portion 402 is radially disposed on the other side of the multi-layer conductor layer, and is disposed opposite to one side of the first layer 3. The two ends of the second vertical end portion 402 are respectively connected to one end of the first horizontal end portion 404, and the other end of the first horizontal end portion 404 is connected to the first vertical end portion 401 to enclose a first insulating region 5.

[0038] The third vertical end portion 403 is radially disposed on the other side of the multi-layer conductor layer, and is disposed opposite to one side of the remaining conductor layers except the first layer 3. The two ends of the third vertical end portion 403 are respectively connected to one end of the second horizontal end portion 405, and the other end of the second horizontal end portion 405 is connected to the first vertical end portion 401 to enclose a second insulating region 6.

[0039] With such an arrangement, the cross-sectional shape of the insulating member 4 is generally in a "B" shape structure. In the initial state, the insulating member 4 can be in a "one" shape structure. When enclosing the first layer 3 and the remaining conductor layers except the first layer 3 respectively, the two ends of the insulating member 4 are bent relatively, and the unbent part becomes Figure 2 the first vertical end portion 401 shown, and the bent part becomes Figure 2 the first horizontal end portion 404, the second vertical end portion 402, as well as the second horizontal end portion 405 and the third vertical end portion 403 shown.

[0040] According to some embodiments of the present invention, the first horizontal end portion 404 adjacent to the second insulating region 6 and the second horizontal end portion 405 adjacent to the first insulating region 5 are radially spaced and stacked.

[0041] With such an arrangement, the first transverse end portion 404 adjacent to the second insulating region 6 and the second transverse end portion 405 adjacent to the first insulating region 5 are stacked in a spaced manner in the radial direction, so that the first layer 3 and the remaining conductor layers are further separated, effectively avoiding the influence of the high-voltage impact borne by the incoming line end coil of the motor on other coils, reducing the risk of insulation withstanding voltage, and improving the safety performance of the motor.

[0042] According to some embodiments of the present invention, the joints of the first transverse end portion 404 with the first vertical end portion 401 and the second vertical end portion 402 are right angles or arcs; and / or, the joints of the second transverse end portion 405 with the first vertical end portion 401 and the third vertical end portion 403 are right angles or arcs.

[0043] With such an arrangement, the joints of the first transverse end portion 404 with the first vertical end portion 401 and the second vertical end portion 402 are designed as right angles, which is convenient for bending and improves the processing efficiency. Or the joints can also be set as arcs, which can better enclose the first layer 3 and other conductor layers, and improve the fitting degree between the insulating component 4 and the first layer 3 and between the insulating component 4 and the remaining conductor layers. Similarly, the joints of the second transverse end portion 405 with the first vertical end portion 401 and the third vertical end portion 403 are right angles or arcs.

[0044] According to some embodiments of the present invention, the first layer 3 is on the side close to the opening of the stator slot 1; or, the first layer 3 is on the side close to the bottom of the stator slot 1.

[0045] That is to say, the first layer 3 can be arranged at the opening position of the stator slot 1, or the first layer 3 can also be arranged at the bottom position of the stator slot 1. Preferably, the first layer 3 can be arranged on the side close to the bottom of the stator slot 1, which is convenient for the arrangement of the incoming line end and the outgoing line end and improves the operation convenience.

[0046] In some embodiments, the insulating component 4 can be insulating paper.

[0047] According to some embodiments of the present invention, the stator assembly further includes: a multi-phase winding, each phase winding includes a plurality of parallel branches, each parallel branch is wound in the stator slot 1, and n layers of conductor unit windings are distributed in each stator slot 1, n≥4, and the n layers of conductor unit windings in each parallel branch include a plurality of hairpins.

[0048] Among them, each parallel branch includes p winding cycle units. Each winding cycle unit starts from the first layer 3. The first layer 3 uses a hairpin with a same-layer jumper, and from the second layer 7 to the (n - 1)th layer, (n - 2) / 2 hairpins with different-layer jumpers are used. The nth layer uses a hairpin with a same-layer jumper, and from the (n - 1)th layer to the second layer, (n - 2) / 2 hairpins with different-layer jumpers are used to wind p cycles to form a branch; the conductor part 2 of the hairpin with a same-layer jumper at the starting point of the first layer 3 of each parallel branch is located in the first insulation area 5.

[0049] See Figure 3 and Figure 4 As shown, the middle row of numbers represents the numbers of the stator slots 1. The six wires from left to right in each slot respectively correspond to the first layer 3, the second layer 7, the third layer 8, the fourth layer 9, the fifth layer 10, and the sixth layer 11. The first layer 3 can be the layer closest to the rotor assembly, that is, the innermost layer relative to the axis of the motor.

[0050] The embodiment shown in the present utility model is the winding path of the three-phase stator winding of a three-phase permanent magnet synchronous motor with 48 stator slots and 8 motor poles. Among them, ABC are the incoming ends of each phase winding, and XYZ are the output ends of each phase winding. Now, taking the winding method of the B-phase winding as an example to illustrate the arrangement of each phase winding of the motor, n = 6 is used for the description.

[0051] Each parallel branch starts from the first layer 3 in one of the stator slots 1 (i.e., the incoming end), such as Figure 4 the first layer 3 in the stator slot 1 labeled 2 as shown. This first layer 3 is a conductor part 2 of a conductor unit. The other conductor part 2 of the conductor unit jumps the wire to the first layer 3 in the stator slot 1 labeled 9. That is to say, the first layer 3 uses a hairpin with a same-layer jumper. Then, from the second layer 7 to the fifth layer 10, two hairpins with different-layer jumpers are used. The sixth layer 11 uses a hairpin with a same-layer jumper, and from the fifth layer 10 to the second layer 7, two hairpins with different-layer jumpers are used to wind p cycles to form a branch, such as B1 - Y1.

[0052] Similarly, B2 - Y2 has the same winding direction as B1 - Y1 to form another branch.

[0053] Among them, the hairpin has two conductor parts 2 to be respectively inserted into the conductor layers in different stator slots 1. Among them, only the two conductor parts 2 of the hairpin in the first layer 3 are both inserted into the first layer 3, the two conductor parts 2 of the second layer and the (n - 1)th layer are inserted into the adjacent layers, and the two conductor parts 2 of the nth layer are inserted into the nth layer.

[0054] Moreover, for each parallel branch, the two conductor portions 2 of the hairpin-shaped cross-over wire at the starting point of the first layer 3 are both located within the first insulation region 5, thereby isolating the first layer 3 of each parallel branch from other conductor layers. When voltage is transmitted to the motor, a large voltage impact will be generated on the first layer 3 at the incoming line end. By using the insulating component 4 to isolate the first layer 3 from the remaining conductor layers, the influence of the high voltage impact borne by the first layer 3 coil on the coils of other layers is avoided, and the risk of insulation voltage withstand is reduced.

[0055] According to some embodiments of the present invention, the parallel branches at least include a first branch and a second branch. The first layer 3 of the first branch is the first starting point, and the starting point of the second branch is arranged on the first layer 3 of the adjacent slot of the stator slot 1 where the first starting point is located. The winding directions of the first branch and the second branch are opposite to each other.

[0056] With such an arrangement, each phase winding includes two parallel branches. That is, the A-phase winding includes A1-X1 and A2-X2; the B-phase winding includes B1-Y1 and B2-Y2; the C-phase winding includes C1-Z1 and C2-Z2. Among them, the B-phase winding includes branch B1 and branch B2. For example, the first layer 3 of branch B1 is located in the first layer 3 within the stator slot 1 numbered 2, and this first layer 3 serves as the first starting point. The starting point of branch B2 is arranged on the first layer 3 within the stator slot 1 numbered 3.

[0057] Moreover, the winding directions of the first branch and the second branch are opposite to each other. In this way, the incoming and outgoing wires of each parallel branch can be distributed more regularly, and the wire shape of each parallel branch is also simplified, which is conducive to the rapid insertion of each phase winding into the stator slot 1 and reduces the wiring difficulty of the multi-phase winding.

[0058] According to some embodiments of the present invention, the conductor unit has two straight portions, two bent portions, and a connecting portion connecting the two straight portions, and the straight portions are the conductor portions 2.

[0059] With such an arrangement, in the initial state, the conductor unit only includes two straight portions and the connecting portion connecting the straight portions. When manufacturing the stator winding, the two straight portions are respectively inserted axially into different stator slots 1. After being inserted in place, the ends of the two straight portions located outside the stator slot 1 in the axial direction are bent, thereby forming two bent portions, and the unbent portions become the straight portions.

[0060] The motor according to the embodiment of the second aspect of the present invention includes a stator assembly.

[0061] Therefore, for the stator assembly according to the embodiments of the present utility model, by arranging the two conductor parts 2 of the hairpin of the same-layer cross wire at the starting point of the first layer 3 of each parallel branch in the first insulation area 5, the first layer 3 of each parallel branch is isolated from other conductor layers. When voltage is transmitted to the motor, an insulating component 4 is used to isolate the first layer 3 from the remaining conductor layers, avoiding the impact of the high voltage borne by the first layer 3 coils on the coils of other layers and reducing the risk of insulation withstanding voltage. Moreover, the insulating component 4 also surrounds the outer periphery of the remaining conductor layers to form a second insulation area 6, further avoiding the impact of the high voltage borne by the coils at the incoming line end of the motor product on the coils of other conductor layers. At the same time, compared with the insulation structure occupying too much space in the stator slot 1 due to the insulation between adjacent winding layers, by arranging the insulating component 4 around the outer periphery of the remaining conductor layers, the filling rate of the winding coils can be improved, thereby improving the overall performance of the motor.

[0062] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0064] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that, Comprising: A stator core, wherein a plurality of stator slots are arranged on the radially inner side of the stator core; A plurality of conductor units, the plurality of conductor units are arranged in the stator slots along the axial direction parallel to the stator core, the conductor parts of the plurality of conductor units are stacked radially to form a multi-layer conductor layer, and the first layer is the incoming line end; An insulating component, the insulating component is disposed around the outer periphery of the first layer to form a first insulating region.

2. The stator assembly according to claim 1, wherein, The insulating component is disposed around the outer peripheries of the remaining conductor layers except the first layer to form a second insulating region.

3. The stator assembly according to claim 2, wherein, The cross-sectional shape of the insulating component includes: A first vertical end portion, the first vertical end portion is arranged radially on one side of the multi-layer conductor layer; A second vertical end portion, the second vertical end portion is arranged radially on the other side of the multi-layer conductor layer and is arranged opposite to one side of the first layer; A third vertical end portion, the third vertical end portion is arranged radially on the other side of the multi-layer conductor layer and is arranged opposite to one side of the remaining conductor layers except the first layer; A first horizontal end portion, both ends of the second vertical end portion are respectively connected to one end of the first horizontal end portion, and the other end of the first horizontal end portion is connected to the first vertical end portion to enclose the first insulating region; A second horizontal end portion, both ends of the third vertical end portion are respectively connected to one end of the second horizontal end portion, and the other end of the second horizontal end portion is connected to the first vertical end portion to enclose the second insulating region.

4. The stator assembly according to claim 3, wherein The first horizontal end portion adjacent to the second insulating region and the second horizontal end portion adjacent to the first insulating region are stacked radially at intervals.

5. The stator assembly according to claim 3, wherein, The joints of the first horizontal end portion with the first vertical end portion and the second vertical end portion are right angles or arcs; and / or, the joints of the second horizontal end portion with the first vertical end portion and the third vertical end portion are right angles or arcs.

6. The stator assembly according to claim 1, wherein Further comprising: A multi-phase winding, each phase winding includes a plurality of parallel branches, each parallel branch is wound in the stator slot, and n layers of conductor unit windings are distributed in each stator slot, n≥4, and the n layers of conductor unit windings in each parallel branch include a plurality of hairpins; Wherein, each parallel branch includes p winding cycle units, each winding cycle unit takes the first layer as a starting point, the first layer uses a same-layer jumper hairpin, and from the second layer to the n-1th layer uses (n-2) / 2 different-layer jumper hairpins, the nth layer uses a same-layer jumper hairpin, and from the n-1th layer to the second layer uses (n-2) / 2 different-layer jumper hairpins, and p cycles are wound to form a branch; the conductor part of the same-layer jumper hairpin at the starting point of the first layer of each parallel branch is located in the first insulating region.

7. The stator assembly according to claim 6, characterized in that, The parallel branch at least includes a first branch and a second branch, the first layer of the first branch is a first starting point, the starting point of the second branch is arranged on the first layer of the adjacent slot of the stator slot where the first starting point is located, and the winding directions of the first branch and the second branch are opposite to each other.

8. The stator assembly according to claim 1, wherein The first layer is the side close to the slot opening of the stator slot; or, the first layer is the side close to the slot bottom of the stator slot.

9. The stator assembly according to claim 1, characterized in that, The conductor unit has two straight portions, two bent portions, and a connecting portion connecting the two straight portions, and the straight portions are the conductor portions.

10. A motor, characterized in that, Comprising the stator assembly according to any one of claims 1-9.

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