Motor stator and manufacturing method thereof, motor and electric appliance

Abstract

The invention discloses a motor stator and a manufacturing method thereof, a motor and an electric appliance, and the motor stator comprises a stator yoke which is in the shape of a ring with an inner cavity, and the inner ring of the stator yoke is provided with a plurality of installation parts at intervals in the circumferential direction; the stator tooth assemblies are located in the inner cavity and arranged in a ring shape, the stator tooth assemblies and the installation parts are assembled and connected in a one-to-one mode, a notch is formed between any two adjacent stator tooth assemblies, and a coil is wound on each stator tooth assembly to form a stator winding. According to the technical scheme, the winding efficiency of the motor stator can be improved, and the production efficiency of the motor stator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly relates to a motor stator, a manufacturing method thereof, a motor, and an electrical appliance. Background Art

[0002] Conventional AC motor stators generally use integral iron cores and need to be wound through an inner winding process. Therefore, the slot opening size Sw of the motor stator is usually greater than or equal to 2 mm. The increase in the slot opening size leads to an increase in the equivalent air gap δ of the motor, resulting in an increase in the air gap reluctance of the motor and a decrease in the energy efficiency of the motor. At the same time, the inner winding speed of the motor generally does not exceed 1400 rpm, and the winding efficiency is very low. Summary of the Invention

[0003] The main object of the present invention is to provide a motor stator, aiming to improve the winding efficiency of the motor stator and the production efficiency of the motor stator.

[0004] To achieve the above object, the motor stator proposed by the present invention includes:

[0005] A stator yoke, which is annular with an inner cavity. A plurality of mounting parts are provided at intervals along the circumferential direction of the inner circle of the stator yoke; and

[0006] A plurality of stator tooth assemblies, which are arranged in a ring side by side in the inner cavity. The stator tooth assemblies are assembled and connected to the mounting parts one by one. A slot opening is formed between any two adjacent stator tooth assemblies. A coil is wound around each stator tooth assembly to form a stator winding.

[0007] In one embodiment, each stator tooth assembly includes a plurality of stacked iron core teeth, and an insulating skeleton disposed outside the plurality of stacked iron core teeth. Each iron core tooth has an assembly part protruding from one side of the insulating skeleton and a tooth end part protruding from the other side of the insulating skeleton. The assembly part is connected to the mounting part. A slot opening is formed between the tooth end parts of any two adjacent iron core teeth among the plurality of iron core teeth located on the same circumference. The coil is wound around the outside of the insulating skeleton.

[0008] In one embodiment, the mounting part is a mounting groove, and the assembly part is embedded in the mounting groove.

[0009] In one embodiment, each stator tooth assembly includes at least two pins. The coils of the plurality of stator windings are independent of each other. In each stator winding, the head and tail of the coil are respectively wound around the two pins of the stator tooth assembly.

[0010] In one embodiment, the plurality of stator tooth assemblies include N main stator tooth assemblies and N auxiliary stator tooth assemblies, and the main stator tooth assemblies and the auxiliary stator tooth assemblies are arranged alternately in the circumferential direction of the stator yoke, where N≥2;

[0011] The coils on the N main stator tooth assemblies are wound by the same main winding wire. One of the main stator tooth assemblies is provided with two pins for winding the head and the tail of the main winding wire respectively, and each main stator tooth assembly is provided with a first wire passing post for the main winding wire to pass around;

[0012] The coils on the N auxiliary stator tooth assemblies are wound by the same auxiliary winding wire. One of the auxiliary stator tooth assemblies is provided with two pins for winding the head and the tail of the auxiliary winding wire respectively, and at least one of the remaining auxiliary stator tooth assemblies is provided with a pin for winding the tap of the auxiliary winding wire. Each auxiliary stator tooth assembly is provided with a second wire passing post for the auxiliary winding wire to pass around; the first wire passing post and the second wire passing post are respectively located at opposite ends of the motor stator.

[0013] In one embodiment, at least part of the stator windings have pins for winding the coils, and the motor stator further includes a wiring board. The wiring board is provided with sockets for inserting the pins, and the wiring board is electrically connected to the stator windings via the pins.

[0014] The present invention also provides a manufacturing method of a motor stator, including the following steps:

[0015] Provide a stator yoke and a plurality of stator tooth assemblies;

[0016] Wind the plurality of stator tooth assemblies to wind coils on each stator tooth assembly, and each stator tooth assembly wound with the coil forms a stator winding;

[0017] Assemble the plurality of stator windings with the stator yoke.

[0018] In one embodiment, the step of providing a stator yoke and a plurality of stator tooth assemblies includes:

[0019] Form a core yoke and core teeth by an integral blanking and stamping process, and the plurality of laminated core yokes form the stator yoke;

[0020] Coat an insulating skeleton around the plurality of laminated core teeth by an in-mold injection molding process to form the stator tooth assemblies; or assemble a preformed insulating skeleton with the plurality of laminated core teeth to form the stator tooth assemblies.

[0021] In one embodiment, the step of winding the coils around the plurality of stator tooth assemblies includes:

[0022] Fix one or more of the stator tooth assemblies to a tooling fixture;

[0023] Wind each of the stator tooth assemblies separately through an external continuous winding process to obtain a plurality of independent stator windings; in each stator winding, the head and tail of the coil are respectively wound around two pins of the stator tooth assembly.

[0024] In one embodiment, the step of assembling the plurality of stator windings with the stator yoke includes:

[0025] Press each of the plurality of stator windings removed from the tooling fixture into the inner cavity of the stator yoke one by one; or, press the plurality of stator windings together with the tooling fixture as a whole into the inner cavity of the stator yoke, and then remove the tooling fixture.

[0026] In one embodiment, the plurality of stator tooth assemblies include N main stator tooth assemblies and N auxiliary stator tooth assemblies, and the main stator tooth assemblies and the auxiliary stator tooth assemblies are alternately arranged along the circumferential direction of the stator yoke, where N≥2;

[0027] The step of winding the coils around the plurality of stator tooth assemblies includes:

[0028] Fix the N main stator tooth assemblies to a tooling fixture, and wind the same main winding around the N main stator tooth assemblies through an external continuous winding process. The main winding passes through the first wire passing posts provided on each of the main stator tooth assemblies to form N interconnected main stator windings. The main winding between any two adjacent main stator windings is located at the first end of the motor stator. The head and tail of the main winding are respectively wound around two pins of one of the main stator tooth assemblies.

[0029] Fix the N auxiliary stator tooth assemblies to a tooling fixture, and wind the same auxiliary winding around the N auxiliary stator tooth assemblies through an external continuous winding process. The auxiliary winding passes through the second wire passing posts provided on each of the auxiliary stator tooth assemblies to form N interconnected auxiliary stator windings. The main winding between any two adjacent auxiliary stator windings is located at the second end of the motor stator. The head and tail of the auxiliary winding are respectively wound around two pins of one of the auxiliary stator tooth assemblies, and the tap of the auxiliary winding is wound around the pins of at least one other auxiliary stator tooth assembly.

[0030] In one embodiment, the step of assembling the plurality of stator windings with the stator yoke includes:

[0031] Press the N interconnected main stator windings together with the tooling as a whole into the inner cavity of the stator yoke, and then remove the tooling; or, press the N interconnected main stator windings separated from the tooling into the inner cavity of the stator yoke.

[0032] Press the N interconnected auxiliary stator windings together with the tooling as a whole into the inner cavity of the stator yoke, and then remove the tooling; or, press the N interconnected auxiliary stator windings separated from the tooling into the inner cavity of the stator yoke.

[0033] In one embodiment, it is characterized in that at least part of the stator windings have pins for winding the coils. After the step of assembling the plurality of stator windings and the stator yoke, the following steps are further included:

[0034] Remove the insulating layer of the winding around the pins, and connect and fix the winding to the pins by fusing and solidifying liquid metal.

[0035] Provide a wiring board, and insert and cooperate the jacks of the wiring board with the pins to form an electrical connection.

[0036] The present invention also provides a motor, including a rotor and the motor stator as described above, and the rotor is rotatably arranged inside the motor stator.

[0037] The present invention also provides an electrical appliance, including the motor as described above.

[0038] The technical solution of the present invention adopts a split structure for the stator yoke and a plurality of stator tooth assemblies. First, the stator windings can be wound on the stator tooth assemblies through an external winding process, and then the stator tooth assemblies are assembled and connected to the installation part of the stator yoke. In this way, the motor can adopt a block motor external winding process, which can increase the winding speed from a maximum of 1400 rpm to a maximum of 7000 rpm, greatly improving the winding efficiency, and further improving the production efficiency of the motor stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0040] Figure 1 It is a schematic structural diagram of the first embodiment of the motor stator of the present invention;

[0041] Figure 2 is Figure 1 a schematic structural diagram of the stator tooth assembly in

[0042] Figure 3 is Figure 2 a schematic structural diagram of the stator tooth assembly from another perspective in

[0043] Figure 4 is Figure 2 a schematic structural diagram of the stator tooth assembly wound with coils to form a stator winding in

[0044] Figure 5 is an assembly schematic diagram of a single stator winding and a stator yoke;

[0045] Figure 6 is an assembly schematic diagram of multiple stator windings and a stator yoke;

[0046] Figure 7 is an assembly schematic diagram of a wiring board and multiple stator windings;

[0047] Figure 8 is a schematic structural diagram of the second embodiment of the motor stator of the present invention;

[0048] Figure 9 is a schematic structural diagram of an embodiment of a main stator tooth assembly;

[0049] Figure 10 is an assembly schematic diagram of multiple main stator tooth assemblies and a tooling;

[0050] Figure 11 is a schematic structural diagram of multiple interconnected main stator windings formed after winding multiple main stator tooth assemblies in

[0051] Figure 12 is Figure 11 a schematic structural diagram of multiple interconnected main stator windings after removing the tooling;

[0052] Figure 13 is a schematic structural diagram of an embodiment of an auxiliary stator tooth assembly;

[0053] Figure 14 is an assembly schematic diagram of multiple auxiliary stator tooth assemblies and a tooling;

[0054] Figure 15 is Figure 14 a schematic structural diagram of multiple interconnected auxiliary stator windings formed after winding multiple auxiliary stator tooth assemblies in

[0055] Figure 16 is Figure 15 a schematic structural diagram of multiple interconnected auxiliary stator windings after removing the tooling;

[0056] Figure 17Assembly schematic diagram of multiple interconnected main stator windings with tooling and the stator yoke;

[0057] Figure 18 For the assembly schematic diagram of multiple interconnected secondary stator windings with tooling and Figure 17 the assembly in

[0058] Figure 19 Structural schematic diagram of an embodiment of the stator core of the motor stator of the present invention;

[0059] Figure 20 For Figure 19 the structural schematic diagram of the core yoke of the stator core in

[0060] Figure 21 For Figure 19 the structural schematic diagram of the multiple core teeth of the stator core in

[0061] Figure 22 For Figure 21 the structural schematic diagram of a single core tooth in

[0062] Figure 23 Flow schematic diagram of an embodiment of the manufacturing method of the motor stator of the present invention.

[0063] Explanation of the reference numerals in the drawings:

[0064]

[0065]

[0066] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0067] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0068] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0069] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0070] The present invention provides a motor stator 100.

[0071] Please refer to Figures 1 to 7 , and Figure 19 , in some embodiments of the present invention, the motor stator 100 includes a stator yoke 10 and a plurality of stator tooth assemblies 21. The stator yoke 10 is in a ring shape with an inner cavity 101. A plurality of mounting portions 11 are provided at intervals along the circumferential direction of the inner ring of the stator yoke 10; a plurality of the stator tooth assemblies 21 are located in the inner cavity 101 and are arranged side by side in a ring shape. The stator tooth assemblies 21 are assembled and connected to the mounting portions 11 one by one. A notch 201 is formed between any two adjacent stator tooth assemblies 21. A coil 22 is wound around each stator tooth assembly 21 to form a stator winding 20.

[0072] The stator yoke 10 is arranged in a ring shape, and specifically, it can be a square ring, a circular ring or other special-shaped rings, which are not specifically limited herein. Exemplarily, in this embodiment, the inner ring of the stator yoke 10 is in a polygon shape (such as a regular octagon), and the outer ring of the stator yoke 10 is generally in a square shape. The stator yoke 10 can be used to mount the stator tooth assemblies 21 and the motor end cover components, and at the same time provide a magnetic circuit. The number of the mounting portions 11 of the stator yoke 10 is the same as the number of the stator tooth assemblies 21, and the specific number can be set according to actual needs. Exemplarily, for a 4-pole AC induction motor, which is composed of a main and a secondary winding, has 8 slots and 8 teeth. Correspondingly, there are 8 stator tooth assemblies 21, and 8 mounting portions 11 are provided at intervals along the circumferential direction of the inner ring of the stator yoke 10. Of course, if it is applied to other pole-pair (P) motors, the corresponding number of teeth Z = 4P is still applicable.

[0073] The stator tooth assembly 21 is assembled and connected to the mounting portion 11, which means that the stator tooth assembly 21 is an independent structure relative to the mounting portion 11 of the stator yoke 10 before assembly, and the two need to be connected together through an assembly structure. Such a design is beneficial to winding the stator winding 20 on the stator tooth assembly 21 through an external winding process and then assembling the stator tooth assembly 21 with the stator yoke 10. Among them, there are various ways to assemble and connect the stator tooth assembly 21 and the mounting portion 11, including but not limited to connecting and fixing by means of embedding, welding, riveting, etc., and no specific limitation is made here. The multiple stator tooth assemblies 21 are independent of each other, and a notch 201 is formed between any two adjacent stator tooth assemblies 21, so that the size of the notch 201 can be adjusted within a large range according to design requirements, which can improve the energy efficiency of the motor. And the complete disconnection of the notch 201 avoids magnetic leakage and additional electromagnetic noise caused by magnetic circuit closure. A coil 22 is wound on each stator tooth assembly 21 to form a stator winding 20. The winding method can be various. For example, each stator assembly can be wound into a coil 22 by a separate winding wire, so that the coils 22 of the multiple stator windings 20 are independent of each other; or at least two of the coils 22 of the stator windings 20 can be wound by the same winding wire, so that at least two of the coils 22 of the stator windings 20 are connected to each other.

[0074] The technical solution of the present invention adopts a split structure for the stator yoke 10 and the multiple stator tooth assemblies 21, and the stator winding 20 can be formed by winding on the stator tooth assembly 21 through an external winding process first, and then the stator tooth assembly 21 is assembled and connected to the mounting portion 11 of the stator yoke 10. In this way, the motor can adopt a segmented motor external winding process, so that the winding speed is increased from a maximum of 1400 rpm to a maximum of 7000 rpm, and the winding efficiency is greatly improved, thereby improving the production efficiency of the motor stator 100.

[0075] Please refer to Figures 2 to 5 , and Figures 19 to 22 , in one embodiment, each of the stator tooth assemblies 21 includes a plurality of stacked core teeth 211 and an insulating skeleton 212 disposed outside the plurality of stacked core teeth 211. Each core tooth 211 has an assembly portion 2111 protruding from one side of the insulating skeleton 212 and a tooth end portion 2112 protruding from the other side of the insulating skeleton 212. The assembly portion 2111 is connected to the mounting portion 11. Among the plurality of core teeth 211 located on the same circumference, the notch 201 is formed between the tooth end portions 2112 of any two adjacent core teeth 211, and the coil 22 is wound around the periphery of the insulating skeleton 212.

[0076] In this embodiment, the stator tooth assembly 21 includes a plurality of stacked core teeth 211. Correspondingly, the stator yoke 10 may include a plurality of stacked core yokes 10a, and the number of layers of the core yoke 10a is the same as that of the core teeth 211 of each stator tooth assembly 21. A plurality of stator tooth assemblies 21 enclose to form a ring. Correspondingly, a plurality of core teeth 211 located on the same layer also enclose to form a ring. A plurality of core teeth 211 located on the same layer and the core yoke 10a are assembled to form a single-layer stator core. Among a plurality of core teeth 211 located on the same circumference, a notch 201 is formed between the tooth ends 2112 of any two adjacent core teeth 211. That is, the tooth ends 2112 of a plurality of core teeth 211 located on the same circumference are disconnected from each other to form a gap, and this gap is the notch 201. Since the core teeth 211 and the core yoke 10a are of a split structure and there is no need to wind the inner winding through the notch 201 part, the width dimension of the notch 201 can be made smaller accordingly. Optionally, as Figure 19 shown, the width dimension of the notch 201 is Sw, where Sw is not less than 0.4 mm and not greater than 1.5 mm. Sw is greater than or equal to 0.4 mm, so that the width dimension of the notch 201 will not be too small, which can avoid magnetic leakage and additional electromagnetic noise caused by magnetic circuit closure. Sw is less than or equal to 1.5 mm, which can reduce the influence of the increase in the equivalent air gap caused by the notch 201, avoid the increase in the air gap reluctance of the motor, and ensure the energy efficiency of the motor. In actual production, the core yoke 10a and a plurality of core teeth 211 can be integrally blanked and stamped by a stamping die, which can improve production efficiency. Optionally, the shapes and sizes of a plurality of core teeth 211 are the same, and there is no need to distinguish directions during the production process, which is conducive to realizing automated production, further improving production efficiency, and reducing production costs.

[0077] To facilitate winding and avoid short circuits at the same time, the stator tooth assembly 21 further includes an insulating skeleton 212 disposed outside the core teeth 211. Among them, there are various assembly methods between the insulating skeleton 212 and the core teeth 211. For example, the insulating skeleton 212 can be coated outside the plurality of stacked core teeth 211 through an in-mold injection molding process to form the stator tooth assembly 21; or the pre-formed insulating skeleton 212 can be assembled with the plurality of stacked core teeth 211 to form the stator tooth assembly 21. For example, the insulating skeleton 212 can include an upper skeleton and a lower skeleton, and the upper skeleton and the lower skeleton are inserted and assembled to clamp the plurality of stacked core teeth 211 between the upper skeleton and the lower skeleton.

[0078] In order to further improve the assembly convenience between the stator yoke 10 and the stator tooth assembly 21 and enhance the assembly efficiency. In one embodiment, the installation portion 11 is an installation groove, and the assembly portion 2111 is fitted into the installation groove. During assembly, it only needs to press the assembly portion 2111 of the stator tooth assembly 21 into the installation groove of the stator yoke 10. The assembly is simple and convenient, which can improve the assembly efficiency.

[0079] To ensure that the assembly portion 2111 of the stator tooth assembly 21 can be smoothly pressed into the installation groove of the stator yoke 10, and at the same time enhance the bonding force between the two and improve the assembly reliability. Optionally, as Figure 20 and Figure 22 shown, the depth dimension of the installation groove is L1, and the dimension of the assembly portion 2111 in the groove depth direction of the installation groove is L2, where L2 is greater than L1. Optionally, the difference between L2 and L1 is greater than or equal to 0.3 millimeters. That is, L2 - L1 ≥ 0.3 mm. In this way, the assembly reliability between the stator yoke 10 and the stator tooth assembly 21 can be further improved.

[0080] There are various ways to wind multiple stator tooth assemblies 21 to form the stator winding 20. Hereinafter, embodiments of two winding methods will be introduced.

[0081] As Figures 1 to 6 shown, in one embodiment, each of the stator tooth assemblies 21 includes at least two pins 213, and the coils 22 of the multiple stator windings 20 are independent of each other. In each stator winding 20, the head and tail of the coil 22 are respectively wound around the two pins 213 of the stator tooth assembly 21.

[0082] In this embodiment, multiple stator tooth assemblies 21 can each be wound with a coil 22 around their outer periphery by an independent winding wire, thereby forming multiple independent stator windings 20. In actual production, multiple stator tooth assemblies 21 can be fabricated first, and then each stator tooth assembly 21 can be wound by an outer winding process. Optionally, the multiple stator tooth assemblies 21 have the same structure and size, facilitating production and manufacturing using the same set of molds. Specifically, the stator tooth assembly 21 can include a core tooth 211 and an insulating skeleton 212 disposed around the core tooth 211. Two pins 213 spaced apart from each other can be provided at the top of the insulating skeleton 212. The head of the winding wire is wound around one of the pins 213, and then the winding wire is wound around the insulating skeleton 212 to form a number of turns of the coil 22, and finally the tail of the winding wire is wound around the other pin 213. It can be understood that the insulating skeleton 212 is generally made of a plastic material with good insulating properties, and the pins 213 are generally made of a metal material with good electrical conductivity. In actual production, the insulating skeleton 212 can be injection-molded first, and the pins 213 can be pressed into the insulating skeleton 212 while the insulating skeleton 212 is not yet completely cooled and solidified, so that the insulating skeleton 212 and the pins 213 are connected as a whole. Of course, when injection-molding the insulating skeleton 212, pin holes can also be pre-formed on the insulating skeleton 212, and when the pins 213 are needed, the pins 213 can be assembled into the pin holes.

[0083] Since the multiple stator windings 20 are independent of each other, there will be no mutual interference between adjacent two stator windings 20. When assembling with the stator yoke 10, multiple stator windings 20 can be successively pressed into the inner cavity 101 of the stator yoke 10, and the stator tooth assemblies 21 of the stator windings 20 are assembled and connected to the mounting portion 11 of the stator yoke 10. For the convenience of winding, multiple stator tooth assemblies 21 can also be assembled on the outer periphery of a tooling 400. For example, 8 stator tooth assemblies 21 can be arranged at intervals along the outer periphery of the tooling 400, and an assembly groove adapted to the assembly portion 2111 of the stator tooth assembly 21 is provided on the outer periphery of the tooling 400. After winding is completed, the multiple stator windings 20 together with the tooling 400 are integrally pressed into the inner cavity 101 of the stator yoke 10, and then the tooling 400 is removed.

[0084] Please refer to Figures 8 to 18 , in another embodiment, the multiple stator tooth assemblies 21 include N main stator tooth assemblies 21a and N sub-stator tooth assemblies 21b, and the main stator tooth assemblies 21a and the sub-stator tooth assemblies 21b are alternately arranged along the circumferential direction of the stator yoke 10, where N≥2;

[0085] The coils 22 on the N main stator tooth assemblies 21a are wound by the same main winding wire 221. One of the main stator tooth assemblies 21a is provided with two pins 213 for winding the head and the tail of the main winding wire 221 respectively, and each main stator tooth assembly 21a is provided with a first wire passing post 214 for the main winding wire 221 to pass around.

[0086] The coils 22 on the N auxiliary stator tooth assemblies 21b are wound by the same auxiliary winding wire 222. One of the auxiliary stator tooth assemblies 21b is provided with two pins 213 for winding the head and the tail of the auxiliary winding wire 222 respectively, and at least one of the remaining auxiliary stator tooth assemblies 21b is provided with a pin 213 for winding the tap of the auxiliary winding wire 222. Each auxiliary stator tooth assembly 21b is provided with a second wire passing post 215 for the auxiliary winding wire 222 to pass around. The first wire passing post 214 and the second wire passing post 215 are respectively located at opposite ends of the motor stator 100.

[0087] In this embodiment, the multiple stator tooth assemblies 21 include main stator tooth assemblies 21a and auxiliary stator tooth assemblies 21b, and the number of the main stator tooth assemblies 21a is the same as that of the auxiliary stator tooth assemblies 21b. Optionally, the main stator tooth assemblies 21a and the auxiliary stator tooth assemblies 21b adopt a symmetric structure, so that the injection mold and the manufacturing tooling 400 fixture can be universal, and the cost can be reduced. Taking an 8-slot and 8-tooth motor as an example, correspondingly, the 8 stator tooth assemblies 21 include 4 main stator tooth assemblies 21a and 4 auxiliary stator tooth assemblies 21b. For example, one of the 4 main stator tooth assemblies 21a has two spaced pins 213 at the top. The number of pins 213 of the auxiliary stator tooth assemblies 21b can be set according to actual needs. If there are N gears for the tap speed regulation of the auxiliary stator winding 20b, there will be corresponding N + 1 pin positions for placing the head, the tap gear positions and the tail of the auxiliary winding wire 222. For example, two of the 4 auxiliary stator tooth assemblies 21b have two spaced pins 213 at the top. The two pins 213 of one of the auxiliary stator tooth assemblies 21b are respectively used for winding the head and the tail of the auxiliary winding wire 222, and the two pins 213 of the other auxiliary stator tooth assembly 21b are respectively used for winding the tap of the auxiliary winding wire 222. When more gear speed regulations are needed, pins 213 can also be provided on more auxiliary stator tooth assemblies 21b, which is not specifically limited herein.

[0088] In order to make the winding arrangement more regular during winding, each main stator tooth assembly 21a is provided with a first wire passing post 214, and each auxiliary stator tooth assembly 21b is provided with a second wire passing post 215. The first wire passing post 214 and the second wire passing post 215 are respectively located at opposite ends of the motor stator 100. In this way, the main winding 221 passes through the wire from the first end of the motor stator 100, and the auxiliary winding 222 passes through the wire from the second end of the motor stator 100. After winding is completed, the main winding 221 connected between two adjacent main stator windings 20a is located at the first end of the motor stator 100, and the auxiliary winding 222 connected between two adjacent auxiliary stator windings 20b is located at the second end of the motor stator 100. When assembling with the stator yoke 10, the main stator winding 20a and the auxiliary stator winding 20b will not interfere with each other, avoiding the breakdown of the enameled wire film due to the pressure difference between the main and auxiliary windings in contact, so as to ensure smooth assembly. For example, two spaced first wire passing posts 214 are provided at the bottom of each main stator tooth assembly 21a, and two spaced second wire passing posts 215 are provided at the top of each auxiliary stator tooth assembly 21b. The main stator winding 20a passes through the wire at the bottom, and the auxiliary stator winding 20b passes through the wire at the top.

[0089] Please refer to Figures 10 to 18 , during actual production, N (for example, 4) main stator tooth assemblies 21a can be assembled on the periphery of the tooling 400. The N main stator tooth assemblies 21a are arranged at intervals along the circumferential direction of the tooling 400, and then the N main stator tooth assemblies 21a are wound by an external continuous winding process, and the wire passes through the first wire passing post 214 during the winding process. In this way, after winding is completed, N interconnected main stator windings 20a can be obtained, and the N main stator windings 20a enclose a ring. Similarly, N (for example, 4) auxiliary stator tooth assemblies 21b can be assembled on the periphery of the tooling 400. The N auxiliary stator tooth assemblies 21b are arranged at intervals along the circumferential direction of the tooling 400, and then the N auxiliary stator tooth assemblies 21b are wound by an external continuous winding process, and the wire passes through the second wire passing post 215 during the winding process. When assembling with the stator yoke 10, the N interconnected main stator windings 20a together with the tooling 400 can be first pressed into the inner cavity 101 of the stator yoke 10, and then the tooling 400 is removed. When the N main stator windings 20a are assembled in place with the stator yoke 10, an installation space for installing the auxiliary stator winding 20b is formed between any two adjacent main stator windings 20a. Then the N interconnected auxiliary stator windings 20b together with the tooling 400 are pressed into the inner cavity 101 of the stator yoke 10, and then the tooling 400 is removed, so that the auxiliary stator windings 20b and the main stator windings 20a are alternately arranged along the circumferential direction of the stator yoke 10.

[0090] Of course, in some embodiments, N interconnected main stator windings 20a and N independent secondary stator windings 20b can also be fabricated. When assembling with the stator yoke 10, the N interconnected main stator windings 20a together with the tooling 400 are integrally pressed into the inner cavity 101 of the stator yoke 10, then the tooling 400 is removed, and then the N secondary stator windings 20b are assembled with the stator yoke 10 one by one. Alternatively, N independent main stator windings 20a and N interconnected secondary stator windings 20b can be fabricated. When assembling with the stator yoke 10, the N interconnected secondary stator windings 20b together with the tooling 400 are integrally pressed into the inner cavity 101 of the stator yoke 10, then the tooling 400 is removed, and then the N main stator windings 20a are assembled with the stator yoke 10 one by one.

[0091] To facilitate the electrical connection of the motor stator 100 to an external circuit, please refer to Figure 1 , Figure 7 and Figure 8 , in some embodiments, at least part of the stator winding 20 has pins 213 around which the coil 22 is wound. The motor stator 100 further includes a wiring board 30. The wiring board 30 is provided with sockets 31 for inserting the pins 213. The wiring board 30 is electrically connected to the stator winding 20 via the pins 213.

[0092] In this embodiment, after multiple stator windings 20 are assembled in place with the stator yoke 10, the insulation layer of the wire wound around the pins 213 can be removed, and the wire is connected and fixed to the pins 213 by the fusion and solidification of liquid metal. For example, the insulation layer of the wire can be removed by dipping in tin and peeling, so as to form a stable and reliable electrical connection between the wire and the pins 213. Then the sockets 31 of the wiring board 30 (such as a PCB board) are plugged into the pins 213, so that the wiring board 30 is electrically connected to the stator winding 20 via the pins 213. Optionally, after the wiring board 30 and the pins 213 are assembled in place, the pins 213 and the pads on the wiring disk are further fixed by soldering. Optionally, the wiring board 30 is provided with sockets, and the wiring board 30 is connected to external leads through the sockets. Alternatively, sockets can also be not provided, and single leads can be directly soldered on the wiring board 30. In some embodiments, the wiring board 30 can also be not provided, and leads can be directly soldered on the pins 213.

[0093] Among them, the shape and size of the wiring board 30 can be determined according to the arrangement of the pins 213 on the multiple stator windings 20. For example, as Figure 1 shown, in the first embodiment, each stator winding 20 is wound separately, and each stator winding 20 has pins 213. Correspondingly, the wiring board 30 can be set as a ring shape. Another example is, as Figure 8As shown, in the second embodiment, the main stator winding 20a and the auxiliary stator winding 20b are wound by using the process of continuous winding with segmented iron cores respectively. In this way, it is only necessary to arrange the insertion pins 213 on part of the main stator winding 20a and the auxiliary stator winding 20b, which can reduce the total number of insertion pins 213 and make the arrangement of the insertion pins 213 more compact. The wiring board 30 can be set as a sector shape, which can reduce the size of the wiring board 30 and lower the cost.

[0094] The present invention also provides a method for manufacturing a motor stator 100.

[0095] Please refer to Figure 23 , in an embodiment of the present invention, the method for manufacturing the motor stator 100 includes the following steps:

[0096] S1. Provide a stator yoke 10 and a plurality of stator tooth assemblies 21;

[0097] Among them, the stator yoke 10 is arranged in a ring shape, specifically, it can be a square ring, a circular ring or other special-shaped rings, and no specific limitation is made here. Exemplarily, in this embodiment, the inner circle of the stator yoke 10 is polygonal (such as a regular octagon), and the outer circle of the stator yoke 10 is generally square. The stator yoke 10 can be used to install the stator tooth assemblies 21 and the motor end cover components, and at the same time provide a magnetic circuit. The number of the installation parts 11 of the stator yoke 10 is the same as the number of the stator tooth assemblies 21, and the specific number can be set according to actual needs. Exemplarily, for a 4-pole AC induction motor, which is composed of a main and an auxiliary winding, has 8 slots and 8 teeth, correspondingly, there are 8 stator tooth assemblies 21, and 8 installation parts 11 are arranged at intervals along the circumferential direction of the inner circle of the stator yoke 10.

[0098] S2. Wind the plurality of stator tooth assemblies 21 so that coils 22 are wound on each of the stator tooth assemblies 21, and each stator tooth assembly 21 wound with the coil 22 forms a stator winding 20;

[0099] Since the stator yoke 10 and the plurality of stator tooth assemblies 21 are of a separated structure, an external winding process can be used to wind the plurality of stator tooth assemblies 21. Among them, there are various ways to wind the plurality of stator tooth assemblies 21. For example, each stator assembly can be wound into a coil 22 by a separate winding respectively, so that the coils 22 of the plurality of stator windings 20 are independent of each other; or at least two of the coils 22 of the stator windings 20 can be wound with the same winding to make at least two of the coils 22 of the stator windings 20 connected to each other.

[0100] S3. Assemble the plurality of stator windings 20 with the stator yoke 10.

[0101] When multiple stator windings 20 are independent of each other, the multiple independent stator windings 20 can be successively pressed into the inner cavity 101 of the stator yoke 10, and the stator tooth assemblies 21 of the stator windings 20 are assembled and connected to the corresponding mounting portions 11 on the stator yoke 10. Alternatively, the multiple stator windings 20 can be assembled on the tooling 400, and the multiple stator windings 20 together with the tooling 400 are pressed into the inner cavity 101 of the stator yoke 10, and the tooling 400 is removed after the assembly is completed. When the coils 22 of at least two of the stator windings 20 are connected to each other, the connected stator windings 20 together with the tooling 400 are pressed into the inner cavity 101 of the stator yoke 10, and the tooling 400 is removed after the assembly is completed.

[0102] The technical solution of the present invention adopts a split structure for the stator yoke 10 and the multiple stator tooth assemblies 21. First, the stator windings 20 can be wound on the stator tooth assemblies 21 through an external winding process, and then the stator tooth assemblies 21 are assembled and connected to the mounting portions 11 of the stator yoke 10. In this way, the motor can adopt a segmented motor external winding process, so that the winding speed is increased from a maximum of 1400 rpm to a maximum of 7000 rpm, and the winding efficiency is greatly improved, thereby improving the production efficiency of the motor stator 100.

[0103] In one embodiment, the step of providing the stator yoke 10 and the multiple stator tooth assemblies 21 includes:

[0104] S11. The iron core yoke 10a and the iron core teeth 211 are formed by an integral nesting stamping process, and the multiple laminated iron core yokes 10a form the stator yoke 10;

[0105] Specifically, as Figures 19 to 22 shown, the stator tooth assembly 21 includes multiple laminated iron core teeth 211. Correspondingly, the stator yoke 10 can include multiple laminated iron core yokes 10a, and the number of layers of the iron core yoke 10a is the same as the number of layers of the iron core teeth 211 of each stator tooth assembly 21. The iron core yoke 10a and the multiple iron core teeth 211 can be integrally formed by stamping with a stamping die, which can improve the production efficiency. Optionally, the shapes and sizes of the multiple iron core teeth 211 are the same, and there is no need to distinguish directions during the production process, which is beneficial to realizing automated production, further improving the production efficiency, and reducing the production cost. In the actual production process, the iron core yoke 10a and the multiple iron core teeth 211 can be integrally formed by stamping with a stamping die. To ensure that the combined iron core teeth 211 and the iron core yoke 10a have sufficient structural force and are easy to press together, the clearance between the convex and concave dies of the stamping die can be designed to be 0.015 mm to 0.05 mm.

[0106] S12. The insulating skeleton 212 is coated around the peripheries of the multiple laminated iron core teeth 211 through an in-mold injection molding process to form the stator tooth assembly 21; or the preformed insulating skeleton 212 is assembled with the multiple laminated iron core teeth 211 to form the stator tooth assembly 21.

[0107] To facilitate winding and avoid short circuits, the stator tooth assembly 21 further includes an insulating skeleton 212 disposed around the iron core teeth 211. There are various ways to assemble the insulating skeleton 212 and the iron core teeth 211. For example, the insulating skeleton 212 can be coated around the peripheries of the multiple laminated iron core teeth 211 through an in-mold injection molding process to form the stator tooth assembly 21; or the preformed insulating skeleton 212 is assembled with the multiple laminated iron core teeth 211 to form the stator tooth assembly 21. For example, the insulating skeleton 212 can include an upper skeleton and a lower skeleton, and the upper skeleton and the lower skeleton are inserted and assembled to clamp the multiple laminated iron core teeth 211 between the upper skeleton and the lower skeleton.

[0108] In one embodiment, the step of winding the multiple stator tooth assemblies 21 so that coils 22 are wound on each stator tooth assembly 21 includes:

[0109] S21. Fix one or more of the stator tooth assemblies 21 on the tooling 400;

[0110] S22. Wind each stator tooth assembly 21 separately through an external continuous winding process to obtain multiple independent stator windings 20; in each stator winding 20, the head and tail of the coil 22 are respectively wound on two pins 213 of the stator tooth assembly 21.

[0111] Specifically, a single stator tooth assembly 21 can be fixed on the tooling 400, and the stator tooth assembly 21 is wound through an external winding process. To improve the winding efficiency, multiple stator tooth assemblies 21 can also be assembled on the outer peripheral surface of the tooling 400 along the circumference of the tooling 400, and the multiple stator tooth assemblies 21 are wound through an external winding process. The stator tooth assembly 21 can include iron core teeth 211 and an insulating skeleton 212 disposed around the iron core teeth 211. Two spaced pins 213 can be provided at the top of the insulating skeleton 212. The head of the winding is wound on one of the pins 213, then the winding is wound on the insulating skeleton 212 to form several turns of the coil 22, and then the tail of the winding is wound on the other pin 213. In this way, multiple independent stator windings 20 can be obtained after winding.

[0112] Such as Figure 5 and Figure 6As shown, after manufacturing a plurality of stator windings 20, further, the step of assembling the plurality of stator windings 20 with the stator yoke 10 includes:

[0113] Press the plurality of stator windings 20 separated from the tooling 400 into the inner cavity 101 of the stator yoke 10 one by one; or, press the plurality of stator windings 20 together with the tooling 400 as a whole into the inner cavity 101 of the stator yoke 10, and then remove the tooling 400.

[0114] Since the plurality of stator windings 20 are independent of each other, there will be no mutual interference between adjacent two stator windings 20. When assembling with the stator yoke 10, the plurality of stator windings 20 can be pressed into the inner cavity 101 of the stator yoke 10 one by one, and the stator tooth assemblies 21 of the stator windings 20 can be assembled and connected with the mounting portions 11 of the stator yoke 10. Or, the plurality of (for example, 8) stator tooth assemblies 21 can be arranged at intervals along the outer periphery of the tooling 400, and the outer periphery of the tooling 400 is provided with assembly grooves adapted to the assembly portions 2111 of the stator tooth assemblies 21. After winding is completed, press the plurality of stator windings 20 together with the tooling 400 as a whole into the inner cavity 101 of the stator yoke 10, and then remove the tooling 400. In this way, the assembly efficiency can be further improved.

[0115] Please refer to Figures 8 to 18 , in another embodiment, the plurality of stator tooth assemblies 21 include N main stator tooth assemblies 21a and N auxiliary stator tooth assemblies 21b, and the main stator tooth assemblies 21a and the auxiliary stator tooth assemblies 21b are alternately arranged along the circumferential direction of the stator yoke 10, where N≥2;

[0116] The step of winding the plurality of stator tooth assemblies 21 so that coils 22 are wound on each of the stator tooth assemblies 21 includes:

[0117] S21’: Fix the N main stator tooth assemblies 21a on the tooling 400, and wind the same main winding 221 on the N main stator tooth assemblies 21a through an external continuous winding process. The main winding 221 passes through the first wire passing posts 214 provided on each of the main stator tooth assemblies 21a to form N interconnected main stator windings 20a. The main winding 221 between any adjacent two main stator windings 20a is located at the first end of the motor stator 100, and the head and tail of the main winding 221 are respectively wound around two pins 213 of one of the main stator tooth assemblies 21a;

[0118] S22' fixes the N sub-stator tooth assemblies 21b on the tooling 400, and winds the same sub-winding 222 around the N sub-stator tooth assemblies 21b through an outer winding and continuous winding process. The sub-winding 222 passes through the second wire passing post 215 provided on each sub-stator tooth assembly 21b to form N interconnected sub-stator windings 20b. The main winding 221 between any two adjacent sub-stator windings 20b is located at the second end of the motor stator 100. The head and tail of the sub-winding 222 are respectively wound around two pins 213 of one of the sub-stator tooth assemblies 21b, and the tap of the sub-winding 222 is wound around the pins 213 of at least one other sub-stator tooth assembly 21b.

[0119] In this embodiment, the plurality of stator tooth assemblies 21 include a main stator tooth assembly 21a and sub-stator tooth assemblies 21b, and the number of the main stator tooth assemblies 21a and the sub-stator tooth assemblies 21b is the same. Optionally, the main stator tooth assembly 21a and the sub-stator tooth assemblies 21b adopt a symmetrical structure, so that the injection mold and the fixture of the manufacturing tooling 400 can be universal, and the cost can be reduced. Taking an 8-slot and 8-tooth motor as an example, correspondingly, the 8 stator tooth assemblies 21 include 4 main stator tooth assemblies 21a and 4 sub-stator tooth assemblies 21b. For example, two spaced pins 213 are provided at the top of one main stator tooth assembly 21a among the 4 stator tooth assemblies 21. The number of pins 213 of the sub-stator tooth assembly 21b can be set according to actual needs. If there are N gears for the tap speed regulation of the sub-stator winding 20b, there are corresponding N + 1 pin positions for placing the head, tap gears, and tail of the sub-winding 222. For example, two spaced pins 213 are provided at the top of two sub-stator tooth assemblies 21b among the 4 sub-stator tooth assemblies 21b. Two pins 213 of one sub-stator tooth assembly 21b are respectively used for winding the head and tail of the sub-winding 222, and two pins 213 of the other sub-stator tooth assembly 21b are respectively used for winding the tap of the sub-winding 222. When more gear speed regulations are needed, pins 213 can also be provided on more sub-stator tooth assemblies 21b, which is not specifically limited herein.

[0120] In order to make the winding arrangement more regular during winding, each main stator tooth assembly 21a is provided with a first wire passing post 214, and each secondary stator tooth assembly 21b is provided with a second wire passing post 215. The first wire passing post 214 and the second wire passing post 215 are respectively located at opposite ends of the motor stator 100. In this way, the main winding 221 passes through the wire from the first end of the motor stator 100, and the secondary winding 222 passes through the wire from the second end of the motor stator 100. After winding is completed, the main winding 221 connected between two adjacent main stator windings 20a is located at the first end of the motor stator 100, and the secondary winding 222 connected between two adjacent secondary stator windings 20b is located at the second end of the motor stator 100. When assembling with the stator yoke 10, the main stator winding 20a and the secondary stator winding 20b will not interfere with each other, avoiding the main and secondary windings from contacting and breaking through the enameled wire film due to the pressure difference, so as to ensure smooth assembly. For example, two spaced first wire passing posts 214 are provided at the bottom of each main stator tooth assembly 21a, and two spaced second wire passing posts 215 are provided at the top of each secondary stator tooth assembly 21b. The main stator winding 20a passes through the wire at the bottom, and the secondary stator winding 20b passes through the wire at the top.

[0121] As Figure 17 and Figure 18 shown, after manufacturing N interconnected main stator windings 20a and N interconnected secondary stator windings 20b, the steps of assembling the plurality of stator windings 20 with the stator yoke 10 include:

[0122] S31. Press the N interconnected main stator windings 20a together with the tooling 400 as a whole into the inner cavity 101 of the stator yoke 10, and then remove the tooling 400; alternatively, press the N interconnected main stator windings 20a separated from the tooling 400 into the inner cavity 101 of the stator yoke 10;

[0123] S32. Press the N interconnected secondary stator windings 20b together with the tooling 400 as a whole into the inner cavity 101 of the stator yoke 10, and then remove the tooling 400; alternatively, press the N interconnected secondary stator windings 20b separated from the tooling 400 into the inner cavity 101 of the stator yoke 10.

[0124] In this embodiment, when assembling with the stator yoke 10, N (e.g., 4) interconnected main stator windings 20a can be first pressed into the inner cavity 101 of the stator yoke 10 together with the tooling 400, and then the tooling 400 is removed. After the N main stator windings 20a are assembled with the stator yoke 10 in place, an installation space for installing the auxiliary stator winding 20b is formed between any two adjacent main stator windings 20a. Then, N (e.g., 4) interconnected auxiliary stator windings 20b are pressed into the inner cavity 101 of the stator yoke 10 together with the tooling 400, and then the tooling 400 is removed, so that the auxiliary stator windings 20b and the main stator windings 20a are arranged alternately along the circumferential direction of the stator yoke 10, which can improve the assembly efficiency.

[0125] Of course, in some embodiments, N interconnected main stator windings 20a and N independent auxiliary stator windings 20b can also be manufactured. When assembling with the stator yoke 10, the N interconnected main stator windings 20a are pressed into the inner cavity 101 of the stator yoke 10 as a whole together with the tooling 400, and then the tooling 400 is removed. Then, the N auxiliary stator windings 20b are assembled with the stator yoke 10 one by one. Alternatively, N independent main stator windings 20a and N interconnected auxiliary stator windings 20b can be manufactured. When assembling with the stator yoke 10, the N interconnected auxiliary stator windings 20b are pressed into the inner cavity 101 of the stator yoke 10 as a whole together with the tooling 400, and then the tooling 400 is removed. Then, the N main stator windings 20a are assembled with the stator yoke 10 one by one.

[0126] Based on the above embodiments, in one embodiment, at least part of the stator winding 20 has pins 213 for winding the coil 22. After the step of assembling the plurality of stator windings 20 with the stator yoke 10, the following steps are further included:

[0127] S4. Remove the insulation layer of the wire wound around the pins 213, and connect and fix the wire to the pins 213 by fusing and solidifying liquid metal;

[0128] S5. Provide a wiring board 30, insert the jack 31 of the wiring board 30 into the pins 213 in a plug-in fit to form an electrical connection.

[0129] In this embodiment, after multiple stator windings 20 and the stator yoke 10 are assembled in place, the insulating layer of the wire wound around the pin 213 can be removed, and the wire and the pin 213 are connected and fixed by the fusion and solidification of liquid metal. For example, the insulating layer of the wire can be removed by dipping in tin and peeling, so as to form a stable and reliable electrical connection between the wire and the pin 213. Then, the jack 31 of the wiring board 30 (such as a PCB board) is inserted into the pin 213, so that the wiring board 30 is electrically connected to the stator winding 20 via the pin 213. Optionally, after the wiring board 30 and the pin 213 are assembled in place, the pad of the pin 213 on the wiring disk is further fixed by soldering. Optionally, the wiring board 30 is provided with a socket, and the wiring board 30 is connected to an external lead through the socket. Alternatively, the socket may not be provided, and a single lead may be directly soldered on the wiring board 30. In some embodiments, the wiring board 30 may not be provided, and a lead may be directly soldered on the pin 213.

[0130] Among them, the shape and size of the wiring board 30 can be determined according to the arrangement of the pins 213 on the multiple stator windings 20. For example, as Figure 1 shown, in the first embodiment, each stator winding 20 is separately wound, and each stator winding 20 has a pin 213. Correspondingly, the wiring board 30 can be set as a ring shape. Another example, as Figure 8 shown, in the second embodiment, the main stator winding 20a and the auxiliary stator winding 20b are respectively wound by the block core continuous winding process. In this way, it is only necessary to arrange pins 213 on some of the main stator windings 20a and the auxiliary stator windings 20b, which can reduce the total number of pins 213 and make the arrangement of the pins 213 more compact. The wiring board 30 can be set as a fan shape, which can reduce the size of the wiring board 30 and reduce the cost.

[0131] The present invention also provides a motor, which includes a rotor and a motor stator 100. The specific structure of the motor stator 100 refers to the above embodiments. Since this motor adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0132] The present invention also provides an electrical appliance, which includes a motor. The specific structure of the motor refers to the above embodiments. Since this electrical appliance adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the electrical appliance includes but is not limited to a fan, a blower, a compressor or other electrical appliances having the above motor, etc.

[0133] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present invention.

Claims

1. A motor stator, characterized in that, Comprising: A stator yoke, in the shape of a ring with an inner cavity, wherein a plurality of mounting portions are circumferentially spaced along the inner circle of the stator yoke; and A plurality of stator tooth assemblies, located in the inner cavity and arranged side by side in a ring shape, the stator tooth assemblies are assembled and connected to the mounting portions one by one, a notch is formed between any two adjacent stator tooth assemblies, and a coil is wound around each stator tooth assembly to form a stator winding.

2. The motor stator according to claim 1, characterized in that, Each stator tooth assembly includes a plurality of laminated core teeth, and an insulating skeleton disposed around the plurality of laminated core teeth. Each core tooth has an assembly portion protruding from one side of the insulating skeleton and a tooth end portion protruding from the other side of the insulating skeleton. The assembly portion is connected to the mounting portion. Among the plurality of core teeth located on the same circumference, the notch is formed between any two adjacent core teeth, and the coil is wound around the periphery of the insulating skeleton.

3. The motor stator according to claim 2, characterized in that, The mounting portion is a mounting groove, and the assembly portion is embedded in the mounting groove.

4. The motor stator according to claim 1, characterized in that, Each stator tooth assembly includes at least two pins. The coils of the plurality of stator windings are independent of each other. In each stator winding, the head and tail of the coil are respectively wound around the two pins of the stator tooth assembly.

5. The motor stator according to claim 1, characterized in that, The plurality of stator tooth assemblies include N main stator tooth assemblies and N auxiliary stator tooth assemblies. The main stator tooth assemblies and the auxiliary stator tooth assemblies are alternately arranged along the circumference of the stator yoke, where N≥2; The coils on the N main stator tooth assemblies are wound by the same main winding. One of the main stator tooth assemblies is provided with two pins for respectively winding the head and tail of the main winding, and each main stator tooth assembly is provided with a first wire passing post for the main winding to pass around; The coils on the N auxiliary stator tooth assemblies are wound by the same auxiliary winding. One of the auxiliary stator tooth assemblies is provided with two pins for respectively winding the head and tail of the auxiliary winding, and at least one of the remaining auxiliary stator tooth assemblies is provided with a pin for winding the tap of the auxiliary winding. Each auxiliary stator tooth assembly is provided with a second wire passing post for the auxiliary winding to pass around; the first wire passing post and the second wire passing post are respectively located at opposite ends of the motor stator.

6. The motor stator according to any one of claims 1 to 5, characterized in that, At least part of the stator windings have pins for winding the coils. The motor stator further includes a wiring board, the wiring board is provided with sockets for inserting the pins, and the wiring board is electrically connected to the stator windings via the pins.

7. A method for manufacturing a motor stator, characterized in that, Including the following steps: Providing a stator yoke and a plurality of stator tooth assemblies; Winding the plurality of stator tooth assemblies so that coils are wound around each stator tooth assembly, and each stator tooth assembly wound with the coil forms a stator winding; Assembling the plurality of stator windings with the stator yoke.

8. The method for manufacturing a motor stator according to claim 7, characterized in that, The step of providing a stator yoke and a plurality of stator tooth assemblies includes: Forming a core yoke and core teeth by an integral nesting stamping process, and the plurality of laminated core yokes form the stator yoke; The insulating skeleton is coated around the periphery of the iron core teeth arranged in multiple layers through an in-mold injection molding process to form the stator tooth assembly; or the preformed insulating skeleton is assembled with the iron core teeth arranged in multiple layers to form the stator tooth assembly.

9. The method for manufacturing a motor stator according to claim 7, characterized in that, The step of winding coils around the multiple stator tooth assemblies includes: Fixing one or more of the stator tooth assemblies to a tooling. Winding each of the stator tooth assemblies separately through an external continuous winding process to obtain multiple independent stator windings; in each stator winding, the head and tail of the coil are respectively wound around two pins of the stator tooth assembly.

10. The method for manufacturing a motor stator according to claim 9, characterized in that, The step of assembling the multiple stator windings with the stator yoke includes: Pressing the multiple stator windings separated from the tooling one by one into the inner cavity of the stator yoke; or, pressing the multiple stator windings together with the tooling as a whole into the inner cavity of the stator yoke, and then removing the tooling.

11. The method for manufacturing a motor stator according to claim 7, characterized in that, The multiple stator tooth assemblies include N main stator tooth assemblies and N auxiliary stator tooth assemblies, and the main stator tooth assemblies and the auxiliary stator tooth assemblies are arranged alternately along the circumferential direction of the stator yoke, where N≥2. The step of winding coils around the multiple stator tooth assemblies includes: Fixing the N main stator tooth assemblies to a tooling, and winding the same main winding around the N main stator tooth assemblies through an external continuous winding process. The main winding passes through the first wire passing posts provided on each of the main stator tooth assemblies to form N interconnected main stator windings. The main winding between any two adjacent main stator windings is located at the first end of the motor stator, and the head and tail of the main winding are respectively wound around two pins of one of the main stator tooth assemblies. Fixing the N auxiliary stator tooth assemblies to a tooling, and winding the same auxiliary winding around the N auxiliary stator tooth assemblies through an external continuous winding process. The auxiliary winding passes through the second wire passing posts provided on each of the auxiliary stator tooth assemblies to form N interconnected auxiliary stator windings. The main winding between any two adjacent auxiliary stator windings is located at the second end of the motor stator, and the head and tail of the auxiliary winding are respectively wound around two pins of one of the auxiliary stator tooth assemblies, and the tap of the auxiliary winding is wound around the pins of at least one other auxiliary stator tooth assembly.

12. The method for manufacturing a motor stator according to claim 11, characterized in that, The step of assembling the multiple stator windings with the stator yoke includes: Pressing the N interconnected main stator windings together with the tooling as a whole into the inner cavity of the stator yoke, and then removing the tooling; or, pressing the N interconnected main stator windings separated from the tooling into the inner cavity of the stator yoke. Pressing the N interconnected auxiliary stator windings together with the tooling as a whole into the inner cavity of the stator yoke, and then removing the tooling; or, pressing the N interconnected auxiliary stator windings separated from the tooling into the inner cavity of the stator yoke.

13. The manufacturing method of the motor stator according to any one of claims 7 to 12, characterized in that, At least a part of the stator windings has pins for winding the coils. After the step of assembling a plurality of the stator windings with the stator yoke, the following steps are further included: Removing the insulation layer of the wire wound around the pins, and connecting and fixing the wire to the pins by fusion solidification of liquid metal; Providing a wiring board, inserting the jacks of the wiring board into the pins in a plug-in fit and forming an electrical connection.

14. A motor, characterized in that, It includes a rotor and a motor stator according to any one of claims 1 to 6, and the rotor is rotatably arranged inside the motor stator.

15. An electrical appliance, characterized in that, It includes a motor according to claim 14.

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