Stator assembly, motor and household appliance

Abstract

The utility model discloses a stator assembly, a motor and a household electrical appliance, and relates to the technical field of motors. The stator assembly comprises the substrate and the multiple layers of windings, the multiple layers of windings are sequentially arranged on the substrate in the axial direction of the stator assembly, and the insulating layers are arranged between the adjacent windings, so that unfavorable conditions such as short circuit are avoided. A plurality of coils of the winding are arranged at intervals in the circumferential direction of the stator assembly, the multilayer winding comprises a plurality of coil stacking layers arranged in the circumferential direction of the stator assembly, and all the coils of each coil stacking layer are connected in sequence. The windings are stacked in the axial direction, so that the magnetic field intensity can be improved, and the power density of the motor is improved. And the coils in the coil stacking layer are connected in sequence, so that the stator assembly is miniaturized, and meanwhile, the end loss of the winding can be reduced. Therefore, the wiring of the winding is more reasonable, and the output performance of the motor is improved.

Description

Technical Field

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

[0002] The PCB motor is a new type of motor, different from traditional motors. The stator of the PCB motor consists of a printed circuit board, on which windings are arranged. Therefore, there is no need to set a stator core, no iron loss in the PCB, and the motor has a small size and a simple structure. The layout and wiring of the windings of the existing PCB motors are relatively complex and unreasonable, and the power is relatively low. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a stator assembly, in which the wiring of the windings is more reasonable and the power of the motor can be improved.

[0004] The utility model also provides a motor and a household appliance having the above stator assembly.

[0005] The stator assembly according to the first aspect embodiment of the utility model includes: a substrate;

[0006] A multi-layer winding, which is sequentially arranged along the axial direction of the stator assembly and connected to the substrate. An insulating layer is provided between adjacent windings. The winding includes a plurality of coils, and the number of coils in each layer of the winding is the same. The plurality of coils in each layer of the winding are arranged at intervals along the circumferential direction of the stator assembly. The multi-layer winding includes a plurality of coil stacking layers arranged along the circumferential direction of the stator assembly, and all the coils in each coil stacking layer are sequentially connected.

[0007] The stator assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0008] By sequentially arranging the multi-layer winding along the axial direction of the stator assembly and providing an insulating layer between adjacent windings, adverse situations such as short circuits can be avoided. The plurality of coils of the winding are arranged at intervals along the circumferential direction of the stator assembly, and the multi-layer winding includes a plurality of coil stacking layers arranged along the circumferential direction of the stator assembly, and all the coils in each coil stacking layer are sequentially connected. By arranging the windings to be stacked axially, the magnetic field intensity can be increased, thereby improving the power density of the motor. And the coils in the coil stacking layer are sequentially connected, so that while the stator assembly is miniaturized, the end loss of the winding can be reduced. Therefore, the wiring of the winding is more reasonable, which is beneficial to improving the output performance of the motor.

[0009] According to some embodiments of the utility model, the number of the coils in each layer of the winding is twelve, and all the coil stacking layers are connected by a star connection method.

[0010] According to some embodiments of the present utility model, along the circumferential direction of the stator assembly, the twelve coils in the same layer of the winding are, in sequence: coil PA1, coil RA2, coil PC2, coil RC2, coil RB2, coil PB2, coil PA2, coil RA1, coil PC1, coil RC1, coil RB1, coil PB1. The stator assembly further includes an input terminal A, an input terminal B, and an input terminal C. The input terminal A is connected to the coil PA1 in any layer, the input terminal B is connected to the coil PB1 in any layer, and the input terminal C is connected to the coil PC1 in any layer.

[0011] According to some embodiments of the present utility model, along the axial direction of the stator assembly, among the multiple layers of windings, the topmost layer is the first-layer winding, and the lowermost layer is the last-layer winding. Two of the input terminal A, the input terminal B, and the input terminal C are connected to the corresponding coils in the first-layer winding, and the other one of the input terminal A, the input terminal B, and the input terminal C is connected to the corresponding coil in the last-layer winding.

[0012] According to some embodiments of the present utility model, the number of windings is at least four layers. Along the axial direction of the stator assembly, among the multiple layers of windings, the first-layer winding is the topmost layer, and the last-layer winding is the lowermost layer. In the first-layer winding, the coil RA2 is connected to the coil PA2; in the winding layer immediately below the first-layer winding, the coil RC1 is connected to the coil RC2; in the last-layer winding, the coil PB2 is connected to the coil RB1.

[0013] According to some embodiments of the present utility model, the number of windings is N, satisfying: 4 ≤ N ≤ 8.

[0014] According to some embodiments of the present utility model, along the axial direction of the stator assembly, among the multiple layers of windings, the first-layer winding is the topmost layer, and the last-layer winding is the lowermost layer. In the first-layer winding, the coil RB1 is connected to the coil PB1, the coil RB2 is connected to the coil PB2, and the coil PC2 is connected to the coil RC2. In the last-layer winding, the coil PA1 is connected to the coil RA2, the coil PA2 is connected to the coil RA1, and the coil PC1 is connected to the coil RC1.

[0015] According to some embodiments of the present utility model, the stator assembly further includes a common terminal a, a common terminal b, and a common terminal c that are connected to each other. Along the axial direction of the stator assembly, among the multiple layers of windings, the first-layer winding is the topmost layer, and the last-layer winding is the lowermost layer. In the first-layer winding, the common terminal a is connected to the coil RA1. In the last-layer winding, the common terminal b is connected to the coil RB2, and the common terminal c is connected to the coil RC2.

[0016] According to some embodiments of the present utility model, the coil is configured to be formed by a strip-shaped wire extending around the inner end portion of the wire, and the winding directions of adjacent coils in the coil stacking layer are opposite.

[0017] According to some embodiments of the present utility model, the substrate is provided with a conductive member penetrating the insulating layer, and adjacent coils in the coil stacking layer are connected through the conductive member.

[0018] According to some embodiments of the present utility model, the coil is configured to be formed by a strip-shaped wire extending around the end portion of the wire, and the number of turns of the wire winding is S, satisfying: 3 ≤ S ≤ 4.

[0019] According to some embodiments of the present utility model, the coil is configured to be formed by a strip-shaped wire extending around the end portion of the wire, and along the radial direction of the stator assembly, the wire width of the wire is H, satisfying: 0.8 mm ≤ H ≤ 1.6 mm.

[0020] The motor according to the embodiment of the second aspect of the present utility model includes the stator assembly described in the above embodiment.

[0021] The motor according to the embodiment of the present utility model has at least the following beneficial effects:

[0022] By adopting the stator assembly of the embodiment of the first aspect, the stator assembly sequentially arranges multiple layers of windings on the substrate along the axial direction of the stator assembly, and an insulating layer is provided between adjacent windings to avoid adverse situations such as short circuits. The multiple coils of the winding are arranged at intervals along the circumferential direction of the stator assembly, and the multiple layers of windings include multiple coil stacking layers arranged along the circumferential direction of the stator assembly, and all the coils of each coil stacking layer are sequentially connected. By arranging the windings to be stacked axially, the magnetic field intensity can be increased, thereby improving the power density of the motor. And the coils in the coil stacking layer are sequentially connected, enabling the miniaturization of the stator assembly while reducing the end losses of the winding. Therefore, the wiring of the winding is more reasonable, which is beneficial to improving the output performance of the motor.

[0023] The household appliance according to the embodiment of the third aspect of the present utility model includes the motor described in the above embodiment.

[0024] The household appliance according to the embodiment of the present utility model has at least the following beneficial effects:

[0025] By adopting the motor of the second aspect embodiment, the stator assembly of the motor arranges multiple layers of windings on the substrate in sequence along the axial direction of the stator assembly, and an insulating layer is provided between adjacent windings to avoid adverse situations such as short circuits. Multiple coils of the winding are arranged at intervals along the circumferential direction of the stator assembly, and the multiple layers of windings include multiple coil stacking layers arranged along the circumferential direction of the stator assembly, and all the coils of each coil stacking layer are connected in sequence. By arranging the windings to be stacked axially, the magnetic field intensity can be increased, thereby improving the power density of the motor. And the coils in the coil stacking layer are connected in sequence, enabling the miniaturization of the stator assembly while reducing the end losses of the winding. Therefore, the wiring of the winding is more reasonable, which is beneficial to improving the output performance of the motor.

[0026] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0027] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0028] Figure 1 is a schematic structural diagram of a stator assembly according to an embodiment of the present utility model;

[0029] Figure 2 is an exploded view of a stator assembly according to an embodiment of the present utility model;

[0030] Figure 3 is an exploded schematic diagram of a coil stacking layer according to an embodiment of the present utility model;

[0031] Figure 4 is a simplified schematic diagram of the winding of a winding according to an embodiment of the present utility model;

[0032] Figure 5 is a schematic structural diagram of a coil according to an embodiment of the present utility model;

[0033] Figure 6 is a schematic structural diagram of a first-layer winding according to an embodiment of the present utility model;

[0034] Figure 7 is a schematic structural diagram of a second-layer winding according to an embodiment of the present utility model;

[0035] Figure 8 is a schematic structural diagram of a third-layer winding according to an embodiment of the present utility model;

[0036] Figure 9 is a schematic structural diagram of a fourth-layer winding according to an embodiment of the present utility model;

[0037] Figure 10It is a schematic structural diagram of the fifth-layer winding of an embodiment of the present utility model;

[0038] Figure 11 It is a schematic structural diagram of the sixth-layer winding of an embodiment of the present utility model;

[0039] Figure 12 It is a schematic structural diagram of the seventh-layer winding of an embodiment of the present utility model;

[0040] Figure 13 It is a schematic structural diagram of the eighth-layer winding of an embodiment of the present utility model.

[0041] Reference numerals:

[0042] Stator assembly 100; Substrate 110; Winding 120; First-layer winding 121; Second-layer winding 122; Third-layer winding 123; Fourth-layer winding 124; Fifth-layer winding 125; Sixth-layer winding 126; Seventh-layer winding 127; Eighth-layer winding 128; Conductor 130; Inner end 131; Outer end 132; Coil 140; Coil stacking layer 150. Detailed implementation manners

[0043] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0044] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element 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.

[0045] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0046] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0047] Referring to Figure 1 and Figure 2 As shown, a stator assembly 100 of an embodiment of the present utility model can be used in a PCB motor. The stator assembly 100 of the embodiment of the present utility model includes a substrate 110 and a multi-layer winding 120. The substrate 110 is a printed circuit board, and the multi-layer winding 120 is sequentially arranged on the substrate 110 along the axial direction of the stator assembly 100. An insulating layer (not shown in the figure) is provided between adjacent windings 120. The insulating layer is used to ensure electrical isolation between adjacent windings 120 and at the same time play a role in physical support to improve the reliability and stability of the stator assembly 100. The winding 120 includes a plurality of coils 140, and the number of coils 140 in each layer of the winding 120 is the same. Referring to Figure 3 As shown, the multi-layer winding 120 includes a plurality of coil stack layers 150 arranged circumferentially along the stator assembly 100. Each coil stack layer includes a plurality of coils 140 arranged axially, and all the coils of each coil stack layer 150 are sequentially connected.

[0048] For example, referring to Figure 2 and Figure 6 As shown, the winding 120 has eight layers, namely the first-layer winding 121, the second-layer winding 122, the third-layer winding 123, the fourth-layer winding 124, the fifth-layer winding 125, the sixth-layer winding 126, the seventh-layer winding 127, and the eighth-layer winding 128. Each layer of the winding 120 includes twelve coils 140. Along the circumferential direction of the stator assembly 100, the twelve coils 140 in the same layer of the winding 120 are: coil PA1, coil RA2, coil PC2, coil RC2, coil RB2, coil PB2, coil PA2, coil RA1, coil PC1, coil RC1, coil RB1, coil PB1. The coil PA1 of the first-layer winding 121, the coil PA1 of the second-layer winding 122, the coil PA1 of the third-layer winding 123, the coil PA1 of the fourth-layer winding 124, the coil PA1 of the fifth-layer winding 125, the coil PA1 of the sixth-layer winding 126, the coil PA1 of the seventh-layer winding 127, and the coil PA1 of the eighth-layer winding 128 are stacked axially to form a coil stack layer 150. The same applies to other coils such as coil RA2 and coil PC2, and details are not repeated here. It should be noted that the number of windings 120 can also be four layers, five layers, six layers, etc., and the number of coils 140 can also be eight, ten, fourteen, etc. The specific number is selected according to the actual situation. For the convenience of explanation, in the subsequent embodiments, it is assumed that there are twelve coils 140 in one layer of the winding 120 as an example for description.

[0049] With the above - mentioned solution, by arranging the windings 120 to be stacked axially, the magnetic field intensity can be increased, thereby enhancing the power density of the motor. The coils 140 in the coil stacking layer 150 are connected axially in sequence. While miniaturizing the stator assembly 100, the end - loss of the windings 120 can be reduced. Therefore, the routing of the windings 120 is more reasonable, which is beneficial to improving the output performance of the motor.

[0050] In the embodiment of the present utility model, the number of windings 120 is N, satisfying 4 ≤ N ≤ 8. For example, the number of N is 4, 5, 6, 7, 8. It can be understood that when N is greater than 8, the number of windings 120 is larger, the stronger the generated magnetic field is, and the higher the performance of the motor is, but the production cost and production difficulty are greater. When N is less than 4, the number of windings 120 is smaller, the weaker the generated magnetic field is, and it is difficult to meet the performance requirements of the motor. Therefore, by reasonably designing the number of windings 120 between 4 and 8, while meeting the motor performance, the production cost can be reduced and the manufacturing efficiency can be improved. It should be noted that for the convenience of explanation, hereinafter, an example in which the number of windings 120 is eight layers will be used for illustration.

[0051] Refer to Figure 1 and Figure 4 As shown, in the embodiment of the present utility model, the number of coils 140 in each layer of the winding 120 is twelve, and the coils 140 of the multi - layer windings 120 are connected by a star connection. The mechanical angle between adjacent coils 140 in the circumferential direction differs by 30°. In the case where the number of pole pairs of the rotor assembly is 5, the electrical angle difference = 360° / (12×5)=150°. Figure 4 One of the hexagonal boxes in can be understood as a coil stacking layer 150. It can be understood that by designing the number of coils 140 of the winding 120 to be twelve, the winding coefficient of the winding 120 can be increased. For example, when the number of coils 140 is twelve and the number of permanent magnets of the rotor assembly is ten, that is, in the 12 - slot 10 - pole motor solution, the winding coefficient of the winding 120 reaches 0.933. Therefore, the electromagnetic field distribution inside the motor can be optimized, making the magnetic field more uniform and stable, and reducing the copper loss during the operation of the motor. This helps to reduce electromagnetic interference and energy loss, improve the power factor of the motor, and thus improve the overall performance of the motor.

[0052] With the above - mentioned solution, the coils 140 of the multi - layer windings 120 are connected by a star connection. When the impedance values of each coil 140 are equal, the currents on the three phase lines will be equal, which helps to achieve the balance of three - phase loads and reduce the vibration and noise during the operation of the motor. The star connection has a certain fault - tolerance ability. When one of the windings 120 or the load fails, since the other windings 120 still remain in the normal working state, the entire motor system will not fail immediately, thereby improving the reliability and stability of the system.

[0053] Referring to Figure 5 As shown, in the embodiment of the present utility model, the coil 140 is configured as a structure formed by a strip-shaped wire 130 extending around the inner end portion 131 of the wire 130. The wire 130 is flat, so the wire 130 has better heat conduction performance and lower temperature rise, is more reliable and stable in a high-temperature environment, and has less mechanical noise and electromagnetic noise. It should be noted that the two ends of the wire 130 are the inner end portion 131 and the outer end portion 132 respectively. The end located inside the coil 140 is the inner end portion 131, and the end located outside the coil 140 is the outer end portion 132. The wire 130 continuously extends outward around the inner end portion 131, similar to a spiral winding. The winding directions of adjacent coils 140 in the coil stacking layer 150 are opposite, and the inner end portions 131 of adjacent coils 140 in the coil stacking layer 150 are connected by a conductive member.

[0054] For example, referring to Figures 6 to 13 as shown, starting from the inner end portion 131, in the coil RC1 of the first-layer winding 121 in Figure 6 , the coil RC1 is arranged to wind counterclockwise; Figure 7 in the coil RC1 of the second-layer winding 122 in Figures 6 to 13 , the coil RC1 is arranged to wind clockwise. The same applies to the coils 140 of other layers and will not be elaborated here. It can be understood that the arrows on the coil 140 in

[0055] Referring to Figure 5 as shown, in the embodiment of the present utility model, the number of turns of the wire 130 is S, satisfying: 3 ≤ S ≤ 4. For example, the number of turns S is three turns or four turns. Along the radial direction of the stator assembly 100, the wire width of the wire 130 is H, satisfying: 0.8 mm ≤ H ≤ 1.6 mm. For example, the value of H can be 0.8 mm, 0.9 mm, 1 mm, 1.3 mm, 1.6 mm. It can be understood that when the number of coils 140 is fixed, the number of turns is affected by the wire width. The larger the wire width, the smaller the resistance, but the number of turns will decrease, resulting in a decrease in the electromotive force generated when cutting the magnetic induction line. Therefore, the wire width and the number of turns affect each other, and the relationship between the resistance and the induced electromotive force needs to be balanced. By setting the number of turns S to 3 or 4 and the wire width H between 0.8 mm and 1.6 mm, the working efficiency of the motor can be maximally improved.

[0056] In an embodiment of the present utility model, adjacent coils 140 in the coil stacking layer 150 are connected by a conductive member (the conductive member is not shown in the figure). For example, the inner ends 131 of adjacent coils 140 are connected by a conductive member. It can be understood that adjacent coils 140 in the coil stacking layer 150 can be connected by a blind via process. For example, the blind via process is as follows: blind vias are drilled on the substrate 110, then deburred, and then chemical copper plating is performed on the blind vias to metallize the blind vias, so that a copper layer is deposited on the surface of the original insulating substrate, and the deposited copper layer constitutes the conductive member, thereby achieving the effect of electrical connection between layers.

[0057] Referring to Figure 4 As shown, in an embodiment of the present utility model, the stator assembly 100 further includes an input terminal A, an input terminal B, and an input terminal C. The input terminal A is connected to the coil PA1 of any layer, the input terminal C is connected to the coil PC1 of any layer, and the input terminal B is connected to the coil PB1 of any layer. It can be understood that the positions of the coil PA1 and the coil PB1 are adjacent, and the coil PC1 is also relatively close to the coil PB1, that is, the positions of the coil PA1, the coil PB1, and the coil PC1 are relatively concentrated, which is convenient for routing the input terminal A, the input terminal B, and the input terminal C, that is, the routing distance can be reduced, the routing difficulty can be reduced, the assembly process can be simplified, and the assembly efficiency can be improved.

[0058] Referring to Figure 6 and Figure 13 As shown, in an embodiment of the present utility model, along the axial direction of the stator assembly 100, the topmost layer of the multi-layer winding 120 is the first-layer winding 120, and the lowermost layer of the winding 120 is the last-layer winding 120. For the convenience of explanation, it is described that the winding 120 has eight layers, the topmost layer is the first-layer winding 121, and the lowermost layer is the eighth-layer winding 128. Two of the input terminal A, the input terminal B, and the input terminal C are connected to the corresponding coils 140 in the first-layer winding 121, and the other one of the input terminal A, the input terminal B, and the input terminal C is connected to the corresponding coil 140 in the eighth-layer winding 128. For example, the input terminal A is connected to the coil PA1 of the first-layer winding 121, the input terminal C is connected to the coil PC1 of the first-layer winding 121, and the input terminal B is connected to the PB1 of the eighth-layer winding 128. Or, the input terminal A is connected to the coil PA1 of the eighth layer, the input terminal B is connected to the PB1 of the eighth-layer winding 128, and the input terminal C is connected to the coil PC1 of the first-layer winding 121. A suitable solution is specifically selected according to the actual situation.

[0059] With the above solution, since the input terminals A, B, and C are located in the first-layer winding 120 or the last-layer winding 120, it is convenient to lead the input terminals A, B, and C to the terminals of the substrate 110, and it is beneficial to control the current flow direction, increase the superposition effect of the magnetomotive force, thereby improving the torque and efficiency of the motor, and reducing the heat concentration and performance degradation caused by uneven current distribution. At the same time, it can also reduce the adverse conditions such as increased vibration, increased noise, and excessive temperature rise caused by voltage imbalance. The connection and wiring between the coils 140 are relatively simple and convenient, which can improve the assembly efficiency of the stator assembly 100.

[0060] As an alternative embodiment, it can also be that one of the input terminals A, B, and C is connected to the corresponding coil 140 in the first-layer winding 121, and the other two of the input terminals A, B, and C are connected to the corresponding coils 140 in the eighth-layer winding 128. Specifically, select a suitable solution according to the actual situation.

[0061] In the embodiment of the present utility model, refer to Figure 6 As shown, the coil RB1 and the coil PB1 are connected, and the coil RB2 and the coil PB2 are connected, that is, the outer end 132 of the coil RB1 and the outer end 132 of the coil PB1 are connected, and the outer end 132 of the coil RB2 and the outer end 132 of the coil PB2 are connected. Refer to Figure 13 As shown, in the last-layer winding 120, for example, in the eighth-layer winding 128, the coil PA1 and the coil RA2 are connected, the coil PA2 and the coil RA1 are connected, and the coil PC1 and the coil RC1 are connected. It can be understood that by adopting the above solution, the current of the input terminal A can flow from the coil PA1 of the first-layer winding 121 to the coil PA1 of the eighth-layer winding 128, and then to the coil RA2 of the eighth-layer winding 128, and then to the coil RA2 of the first-layer winding 121. The current flow directions of the input terminals B and C are the same and will not be elaborated. Since each layer of winding 120 generates a magnetomotive force after being energized, by reasonably designing the connection method of the coils 140, the magnetomotive forces are superimposed on each other inside the motor, thereby generating a stronger magnetic field and improving the performance of the motor.

[0062] Refer to Figure 6 As shown, in the embodiment of the present utility model, in the first-layer winding 121, the coil RA2 and the coil PA2 are connected; refer to Figure 7 As shown, in the next-layer winding 120 of the first-layer winding 121, that is, in the second-layer winding 122, the coil RC1 and the coil RC2 are connected; refer to Figure 13As shown, in the last-layer winding 120, for example, in the eighth-layer winding 128, the coil PB2 and the coil RB1 are connected. It can be understood that the coil RA2 and the coil PA2 are connected in the first-layer winding 121. Therefore, the current in the input terminal A flows from the coil PA1 to the coil RA2, then through the coil RA2 to the coil PA2, and finally to the coil RA1. The current flow directions of the other coils 140 are similar and will not be elaborated here. This enables the current to flow from the first-layer winding 121 to the eighth-layer winding 128, or from the eighth-layer winding 128 to the first-layer winding 121, thereby more effectively controlling the current flow direction, increasing the superposition effect of the magnetomotive force, and thus improving the torque and efficiency of the motor.

[0063] It should be noted that the coil RC1 and the coil RC2 are connected in the second-layer winding 122 rather than in the first-layer winding 121 because when connected in the first-layer winding 121, it is easy to contact the input terminal C or the input terminal A, resulting in adverse effects such as short circuits. Therefore, the coil RC1 and the coil RC2 are connected in the second-layer winding 122 to avoid contacting the input terminal C and the input terminal A, so as to improve the safety of the wire routing and the production efficiency. As an alternative embodiment, it can also be that the coil RC1 and the coil RC2 in the first-layer winding 121 are connected, and an insulating sheet is provided at the position where it contacts the input terminal C or the input terminal A.

[0064] Referring to Figure 4 As shown, in the embodiment of the present utility model, the stator assembly 100 further includes a common terminal a, a common terminal b, and a common terminal c that are connected to each other. Referring to Figure 6 As shown, in the first-layer winding 121, the common terminal a is connected to the coil RA1. Referring to Figure 13 As shown, in the eighth-layer winding 128, the common terminal b is connected to the coil RB2, and the common terminal c is connected to the coil RC2. It can be understood that by adopting the above connection method, the current can pass through most of the coils 140 and finally output from the common terminal a, the common terminal b, and the common terminal c, thereby increasing the superposition effect of the magnetomotive force and thus improving the torque and efficiency of the motor. It should be noted that as an alternative embodiment, it can also be: in the first-layer winding 121, the common terminal a is connected to the coil RA1, and the common terminal c is connected to the coil RC2. In the eighth-layer winding 128, the common terminal b is connected to the coil RB2. Or, in the first-layer winding 121, the common terminal c is connected to the coil RC2. In the eighth-layer winding 128, the common terminal a is connected to the coil RA1, and the common terminal b is connected to the coil RB2. Specifically, select a suitable solution according to the actual situation.

[0065] A motor according to an embodiment of the present utility model includes the stator assembly 100 of the above embodiment. The motor according to the embodiment of the present utility model adopts the stator assembly 100 of the above embodiment. By sequentially arranging multiple layers of windings 120 along the axial direction of the stator assembly 100 on the substrate 110, an insulating layer is provided between adjacent windings 120 to avoid adverse situations such as short circuits. A plurality of coils 140 of the winding 120 are arranged at intervals along the circumferential direction of the stator assembly 100, and the multiple layers of windings 120 include a plurality of coil stacking layers 150 arranged along the circumferential direction of the stator assembly 100, and all the coils 140 of each coil stacking layer 150 are sequentially connected. By arranging the windings 120 to be stacked axially, the magnetic field strength can be increased, thereby improving the power density of the motor. And the coils 140 in the coil stacking layer 150 are sequentially connected axially, so that while the stator assembly 100 is miniaturized, the end losses of the winding 120 can be reduced. Therefore, the wiring of the winding 120 is more reasonable, which is beneficial to improving the output performance of the motor.

[0066] Since the motor adopts all the technical solutions of the stator assembly 100 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here.

[0067] A household appliance according to an embodiment of the present utility model can be an air conditioner, a refrigerator, a fan, a humidifier, etc. The household appliance includes the motor of the above embodiment. The household appliance according to the embodiment of the present utility model adopts the motor of the above embodiment. The stator assembly 100 of the motor sequentially arranges multiple layers of windings 120 along the axial direction of the stator assembly 100 on the substrate 110, and an insulating layer is provided between adjacent windings 120 to avoid adverse situations such as short circuits. A plurality of coils 140 of the winding 120 are arranged at intervals along the circumferential direction of the stator assembly 100, and the multiple layers of windings 120 include a plurality of coil stacking layers 150 arranged along the circumferential direction of the stator assembly 100, and all the coils 140 of each coil stacking layer 150 are sequentially connected. By arranging the windings 120 to be stacked axially, the magnetic field strength can be increased, thereby improving the power density of the motor. And the coils 140 in the coil stacking layer 150 are sequentially connected axially, so that while the stator assembly 100 is miniaturized, the end losses of the winding 120 can be reduced. Therefore, the wiring of the winding 120 is more reasonable, which is beneficial to improving the output performance of the motor.

[0068] Since the household appliance adopts all the technical solutions of the motor of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here.

[0069] The above has described the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which it pertains, various changes can be made without departing from the gist of the present utility model.

Claims

1. Stator assembly, characterized in that, Comprising: Substrate; Multi-layer windings, arranged in sequence along the axial direction of the stator assembly and connected to the substrate. An insulating layer is provided between adjacent windings. Each winding includes a plurality of coils, and the number of coils in each layer of the winding is the same. The plurality of coils in each layer of the winding are arranged at intervals along the circumferential direction of the stator assembly. The multi-layer windings include a plurality of coil stack layers arranged along the circumferential direction of the stator assembly, and all the coils in each coil stack layer are connected in sequence.

2. The stator assembly according to claim 1, characterized in that: The number of coils in each layer of the winding is twelve, and all the coil stack layers are connected by a star connection method.

3. The stator assembly according to claim 2, wherein: Along the circumferential direction of the stator assembly, the twelve coils in the same layer of the winding are, in sequence: coil PA1, coil RA2, coil PC2, coil RC2, coil RB2, coil PB2, coil PA2, coil RA1, coil PC1, coil RC1, coil RB1, coil PB1. The stator assembly further includes input terminals A, B, and C. The input terminal A is connected to the coil PA1 of any layer, the input terminal B is connected to the coil PB1 of any layer, and the input terminal C is connected to the coil PC1 of any layer.

4. The stator assembly according to claim 3, characterized in that: Along the axial direction of the stator assembly, among the multi-layer windings, the topmost layer is the first-layer winding, and the bottommost layer is the last-layer winding. Two of the input terminals A, B, and C are connected to the corresponding coils in the first-layer winding, and the other one of the input terminals A, B, and C is connected to the corresponding coil in the last-layer winding.

5. The stator assembly according to claim 3, wherein: The number of windings is at least four layers. Along the axial direction of the stator assembly, among the multi-layer windings, the topmost layer is the first-layer winding, and the bottommost layer is the last-layer winding. In the first-layer winding, the coil RA2 is connected to the coil PA2; in the winding layer below the first-layer winding, the coil RC1 is connected to the coil RC2; In the last-layer winding, the coil PB2 is connected to the coil RB1.

6. The stator assembly according to claim 5, wherein: The number of windings is N, satisfying: 4 ≤ N ≤ 8.

7. The stator assembly according to claim 3, characterized in that: Along the axial direction of the stator assembly, among the multi-layer windings, the topmost layer is the first-layer winding, and the bottommost layer is the last-layer winding. In the first-layer winding, the coil RB1 is connected to the coil PB1, the coil RB2 is connected to the coil PB2, and the coil PC2 is connected to the coil RC2. In the last-layer winding, the coil PA1 is connected to the coil RA2, the coil PA2 is connected to the coil RA1, and the coil PC1 is connected to the coil RC1.

8. The stator assembly according to claim 3, wherein: The stator assembly further includes a common terminal a, a common terminal b, and a common terminal c connected to each other. Along the axial direction of the stator assembly, among the multi-layer windings, the topmost layer is the first-layer winding, and the bottommost layer is the last-layer winding. In the first-layer winding, the common terminal a is connected to the coil RA1. In the last-layer winding, the common terminal b is connected to the coil RB2, and the common terminal c is connected to the coil RC2.

9. The stator assembly according to claim 1, wherein: The coil is configured to be formed by a strip-shaped wire extending around the inner end portion of the wire, and the winding directions of adjacent coils in the coil stacking layer are opposite.

10. The stator assembly according to claim 9, wherein: The substrate is provided with a conductive member penetrating through the insulating layer, and adjacent coils in the coil stacking layer are connected through the conductive member.

11. The stator assembly according to claim 1, characterized in that: The coil is configured to be formed by a strip-shaped wire extending around the end portion of the wire, and the number of turns of the wire winding is S, satisfying: 3 ≤ S ≤ 4.

12. The stator assembly according to claim 1 or 11, characterized in that: The coil is configured to be formed by a strip-shaped wire extending around the end portion of the wire, and along the radial direction of the stator assembly, the wire width of the wire is H, satisfying: 0.8 mm ≤ H ≤ 1.6 mm.

13. Electric motor, characterized in that: It includes the stator assembly according to any one of claims 1 to 12.

14. Household appliance, characterized in that: It includes the motor according to claim 13.

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