A stator assembly, a unidirectional motor and a manufacturing method thereof

Abstract

The application provides a kind of stator assembly, single-phase motor and its manufacturing method, the stator assembly includes stator and multiple stator coils;Stator includes stator core, and multiple teeth are circumferentially provided on stator core;Multiple stator coils are independently arranged on each tooth to form stator winding respectively;Stator winding includes main phase winding and auxiliary phase winding;Each pole winding of main phase winding and auxiliary phase winding includes M stator coils;M satisfies: M >= 2, and M is positive integer.The scheme provided by the application, by designing each pole winding of main phase winding and auxiliary phase winding includes multiple stator coils, multiple stator coils can be independently wound on each tooth, and can be connected in multiple ways to form stator winding, so as to shorten the wiring time of coil, improve the winding efficiency of stator core.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to a stator assembly, a unidirectional motor, and a method for manufacturing the same. Background Technology

[0002] Existing single-phase asynchronous motors are widely used in various fields of industry, agriculture, and daily life due to their simple structure, low cost, low noise, and ease of use, especially in household appliances, electrical tools, and medical devices. A single-phase asynchronous motor has two sets of stator windings: a main phase winding and a secondary phase winding, which are wound on the teeth of the stator core.

[0003] In the existing technology, due to the limitations of the stator core structure design of the centralized winding structure motor, the main phase winding and the auxiliary phase winding need to be wound in a specific order for each individual tooth section, resulting in a single wiring method, long wiring time, low production efficiency, and inability to meet the market supply demand.

[0004] Because existing stator assemblies suffer from technical problems such as limited wiring methods, this invention researches and designs a stator assembly and a unidirectional motor. Summary of the Invention

[0005] Therefore, the present invention provides a stator assembly, a unidirectional motor and a method for manufacturing the same, which can solve the technical problem of the single stator winding wiring method in the prior art.

[0006] To address the aforementioned problems, this invention provides a stator assembly comprising a stator and a plurality of stator coils; the stator includes a stator core with a plurality of teeth circumferentially arranged thereon; the plurality of stator coils are independently disposed on each of the teeth to form stator windings; the stator windings include a primary phase winding and a secondary phase winding; each pole of the primary phase winding and the secondary phase winding includes M stator coils; M satisfies: M≥2, and M is a positive integer.

[0007] In some implementations, each pole winding is an N-pole winding or an S-pole winding.

[0008] In some implementations, M stator coils are connected in series.

[0009] In some implementations, M stator coils are respectively disposed on adjacent teeth.

[0010] In some implementations, M satisfies: Z is the number of teeth on the stator core, Z satisfies: Z≥8 and Z is an even number; p is the number of pole pairs of the stator winding; m is the number of power supply phases.

[0011] In some embodiments, the stator winding includes a primary phase winding and a secondary phase winding, each comprising multiple primary and secondary phase windings, which are alternately arranged on the stator core; the current directions of two adjacent primary phase windings are opposite, the current directions of two adjacent secondary phase windings are opposite, and the current directions of adjacent primary and secondary phase windings are opposite.

[0012] In some implementations, one end of the stator coil of the primary phase winding and one end of the stator coil of the secondary phase winding are connected by a capacitor, and the other end of the stator coil of the primary phase winding is connected to the other end of the stator coil of the secondary phase winding.

[0013] In some embodiments, each tooth is provided with a pin, which includes a first pin and a second pin; the wire end of each stator coil is connected to the first pin, and the wire end of each stator coil is connected to the second pin.

[0014] In some embodiments, each tooth is further provided with a first pin boss and a second pin boss, with the first pin disposed on the first pin boss and the second pin disposed on the second pin boss; the stator also includes a terminal block, which is fixedly connected to the pins on each tooth.

[0015] In some implementations, multiple teeth are arranged circumferentially on the outer sidewall of the stator core.

[0016] The present invention also provides a single-phase motor, including a stator assembly, wherein the stator assembly is the stator assembly of any one of the preceding claims.

[0017] In some embodiments, the single-phase motor includes a rotor assembly, which includes a shaft and a rotor core, with the shaft disposed inside the rotor core; the stator assembly also includes a base and a bearing; the stator core is sleeved on the outside of the base, and the bearing is disposed on the inside of the base; the shaft is disposed on the bearing and extends out of the base; the rotor core is sleeved on the outside of the stator core and is capable of rotating with the shaft.

[0018] In some embodiments, the rotor assembly further includes a rotor end ring and a rotor end face; the rotor end ring is disposed on the upper end face of the rotor core, and the rotor end face is disposed on the lower end face of the rotor core; the rotor core is provided with rotor slots, and metal guide bars are provided in the rotor slots, with one end of the metal guide bars connected to the rotor end ring and the other end of the metal guide bars connected to the rotor end face.

[0019] In some implementations, the shaft, rotor end ring, rotor end face, and metal guide bar are integrally formed by solidifying a non-magnetic liquid metal material.

[0020] In some embodiments, the rotor core and stator core are each made of multiple sheets of ferromagnetic material stacked together.

[0021] The present invention also provides an electric motor, which includes the aforementioned motor assembly.

[0022] In some implementations, the motor is a single-phase asynchronous motor.

[0023] In some implementations, the motor is an external rotor motor.

[0024] The present invention also provides a method for manufacturing a single-phase motor, the method comprising the following steps:

[0025] S1: Solidify non-magnetic liquid metal material to form an integrated structure of rotating shaft, rotor end ring, rotor end face and metal guide bar;

[0026] S2: The rotor core is placed in the inner cavity of the die-casting mold, and then liquid metal conductive material is injected into the mold groove of the die-casting mold, so that the rotor core, shaft, rotor end ring, rotor end face and metal guide bar are integrated to form a rotor assembly.

[0027] S3: Wind stator coils around each tooth on the stator core; connect the beginning and end of the stator coils to the corresponding pins on the teeth; fix the terminal block to the pins on each tooth to form a stator assembly.

[0028] S4: Press the bearing onto the inside of the base and press the stator assembly onto the outside of the base;

[0029] S5: Press the shaft into the bearing to complete the motor assembly.

[0030] The stator assembly, unidirectional motor, and manufacturing method thereof provided by this invention have the following beneficial effects:

[0031] 1. The solution provided by the present invention includes multiple stator coils in each pole of the main phase winding and the secondary phase winding. The multiple stator coils can be independently wound on each tooth, which can shorten the wiring time of the coils, improve the production efficiency of the motor, and at the same time disperse the contact area between each coil and the tooth, thus solving the problems of low motor performance efficiency, poor heat dissipation performance and high motor temperature.

[0032] 2. The solution provided by the present invention improves the magnetomotive force and electromotive force waveforms, reduces additional losses, and enhances motor performance by designing the connection method of each pole winding on the stator core.

[0033] 3. The solution provided by this invention, through the design of the rotor and its supporting structure, makes the rotor run more balanced and has better mechanical strength. Attached Figure Description

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the motor structure of the present invention;

[0036] Figure 2 This is a cross-sectional view of the motor of the present invention;

[0037] Figure 3 This is a partial cross-sectional view of the motor of the present invention;

[0038] Figure 4 This is a schematic diagram of the stator structure of the present invention;

[0039] Figure 5 This is a partial cross-sectional view of the stator of the present invention;

[0040] Figure 6 This is a front view of the stator of the present invention;

[0041] Figure 7 This is a partial cross-sectional view of the rotor of the present invention;

[0042] Figure 8 This is a front view of the rotor of the present invention;

[0043] Figure 9 This is the stator coil distribution wiring diagram of the present invention;

[0044] Figure 10 This is a schematic diagram of the stator coil wiring principle of the present invention;

[0045] Figure 11 This is a distributed diagram of the stator coils of the present invention.

[0046] The attached figures are labeled as follows:

[0047] 10. Stator assembly; 11. Stator; 12. Base; 121. Base boss; 13. Bearing; 14. Stator coil; 141. Main phase winding; 142. Secondary phase winding; 143. Wire end winding end; 144. Wire tail winding end; 15. Terminal block; 16. Stator frame; 161. Tooth section; 162. Slot section; 17. Stator core; 18. Pin; 181. Pin boss; 20. Rotor assembly; 21. Shaft; 22. Rotor core; 23. Rotor end ring; 24. Rotor end face; 25. Metal conductor bar. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0052] See Figure 1-6As shown, according to an embodiment of the present invention, a stator assembly 10 is provided, which includes a stator 11 and a plurality of stator coils 14; wherein the stator 11 includes a stator core 17, and a plurality of teeth 161 are provided in the circumferential direction of the stator core 17; specifically, the plurality of teeth 161 can be disposed in the circumferential direction of the outer sidewall of the stator core 17 or in the circumferential direction of the inner sidewall of the stator core 17, thereby forming a winding structure; the winding structure includes a main winding structure and a secondary winding structure. Further, the plurality of stator coils 14 are independently disposed on each of the teeth 161 to form a stator winding; the stator winding includes a main phase winding and a secondary phase winding. Further, each pole of the main phase winding and the secondary phase winding respectively includes M stator coils 14, wherein M satisfies: M≥2, and M is a positive integer; this design allows any M stator coils to be connected to form a stator winding, and the connection method is relatively flexible. Furthermore, each pole winding can be an N-pole winding or a S-pole winding. Furthermore, the stator winding includes a main phase winding 141 and a secondary phase winding 142; wherein, the main phase winding 141 is disposed on the main winding structure, and each pole winding of the main phase winding 141 can be an N-pole winding or a S-pole winding; the secondary phase winding 142 is disposed on the secondary winding structure, and each pole winding of the secondary phase winding 142 can be an N-pole winding or a S-pole winding.

[0053] This invention designs each pole of the main phase winding and the secondary phase winding to include multiple stator coils. These multiple stator coils can be independently wound on each tooth and can be connected in various ways to form stator windings. This can shorten the coil wiring time and improve the winding efficiency of the stator core. At the same time, it can disperse the contact area between each stator coil and the tooth, solving the problems of low motor performance efficiency, poor heat dissipation, and high motor temperature.

[0054] See Figure 2-6 As shown, in some embodiments, M stator coils 14 are connected in series to ensure that the current direction on each pole winding is consistent. Furthermore, the M stator coils 14 are respectively disposed on adjacent teeth 161, which allows for efficient winding of the coils in each pole winding of the stator winding and facilitates connection and conduction between the stator coils.

[0055] See Figure 2-6 As shown, in some embodiments, the number of teeth on the stator core of a single-phase asynchronous motor is determined by the number of power supply phases and the number of pole pairs, and for lumped windings, the number of stator teeth Z satisfies: Z = 2mp, where m is the number of power supply phases and p is the number of pole pairs in the stator winding. The design M in this application satisfies: Z represents the number of teeth 161 on the stator core 17, satisfying: Z≥8 and Z is an even number; p represents the number of pole pairs in the stator winding; m represents the number of power supply phases. By adopting the above scheme and designing the connection method of each pole winding on the stator core, the magnetomotive force and electromotive force waveforms are improved, additional losses are reduced, and motor performance is enhanced.

[0056] See Figure 6 , Figure 9 , Figure 10 as well as Figure 11 As shown, in some embodiments, the stator winding includes a primary phase winding 141 and a secondary phase winding 142. Multiple primary phase windings 141 and secondary phase windings 142 are included, and the multiple primary phase windings 141 are connected to each other via conductive wires, as are the multiple secondary phase windings 142. The primary phase windings 141 and secondary phase windings 142 are alternately arranged on the winding structure of the stator core 17. Further, the primary phase windings 141 and secondary phase windings 142 each include multiple N-pole windings or S-pole windings. The number of N-pole windings in the primary phase winding 141 is equal to the number of S-pole windings in the secondary phase winding 142, and the number of S-pole windings in the primary phase winding 141 is equal to the number of N-pole windings in the secondary phase winding 142. Further, each N-pole winding or S-pole winding includes multiple stator coils connected in series, and the multiple stator coils are respectively wound on each tooth 161 of the primary winding structure. Preferably, see reference... Figure 6 and Figure 11 Taking the example shown, the number of teeth Z is designed to be 8. The first main winding structure includes two teeth. The N-pole winding of the first main phase winding includes two stator coils, namely 1 and 2, forming the N-pole winding of the first main phase winding. The N-pole winding of the second main phase winding also includes two stator coils, namely 5 and 6, forming the N-pole winding of the second main phase winding. Each stator coil 14 is disposed on one tooth. (Reference) Figure 6 and Figure 11 Taking the example shown, the first secondary winding structure includes two teeth. The S-pole winding of the first secondary phase winding includes two stator coils, namely 3 and 4, forming the S-pole winding of the first secondary phase winding. The S-pole winding of the second secondary phase winding also includes two stator coils, namely 7 and 8, forming the S-pole winding of the second secondary phase winding. Each stator coil is located on one tooth. Furthermore, the current directions of two adjacent primary phase windings are opposite, the current directions of two adjacent secondary phase windings are opposite, and the current directions of adjacent primary and secondary phase windings are opposite. Each tooth 161 and its winding coil are independent and do not need to be wound sequentially in a specific order; winding can be performed simultaneously, improving winding efficiency.

[0057] See Figure 10As shown, in some embodiments, one end of the stator coil of the primary phase winding and one end of the stator coil of the secondary phase winding are connected by a capacitor, and the other end of the stator coil of the primary phase winding is connected to the other end of the stator coil of the secondary phase winding. Further, the primary phase winding and the secondary phase winding are 90° out of phase in space, causing the windings to form a nearly circular rotating magnetic field. Further, the other ends of the primary phase winding and the secondary phase winding are directly connected, forming a common point, and one end of the capacitor and the common point are respectively connected to an external power supply. The capacitor value is defined. Where u is the rated voltage, M is the turns ratio of the main and auxiliary windings, η is the motor efficiency, π is pi, f is the power supply frequency, and p is the output power.

[0058] See Figure 2-6 As shown, in some embodiments, at least two pin bosses 181 are provided on each tooth 161. The pin bosses 181 are used to mount pins 18, which are used to connect the beginning or end of the coil winding on each tooth 161. Further, the pin bosses 181 are preferably located on the upper end face of the tooth 161 and at both ends of the coil wound on the tooth 161. Specifically, each tooth 161 is provided with a first pin boss and a second pin boss, and pins 18 are respectively mounted on the first and second pin bosses. Further, the pins 18 and the pin bosses 181 are welded together. Specifically, the beginning 143 of the stator coil 14 is connected to the pin 18 on the first pin boss, and the end 144 of the stator coil 14 is connected to the pin 18 on the second pin boss. Furthermore, the stator 11 also includes a terminal block 15, which has a ring-shaped structure and an outer diameter identical to that of the stator core 17. The terminal block 15 is also fixedly connected to pins 18 on each tooth 161 for positioning. In this design, by providing a terminal block 15 on the end face of the stator core 17 and connecting it to each tooth 161 via pins 18, the coil wires on each tooth 161 can be connected via the terminal block 15, thus meeting the electrical connection and potential requirements of this application and achieving efficient arrangement of the entire stator coil. Furthermore, the stator 11 also includes a stator frame 16, which is fitted onto the teeth 161 of the stator core 17. This allows the coil of the stator coil 14 to be wound around the stator frame 16, avoiding direct contact with the teeth 161 of the stator core 17 and providing insulation.

[0059] See Figure 3-6 , Figure 8As shown, in some embodiments, the stator core 17 is integrally cylindrical. The preferred design location of the plurality of teeth 161 is circumferentially located on the outer wall of the stator core 17, facilitating efficient winding and installation of the stator coil. Specifically, a plurality of teeth 161 protrude radially from the outer wall of the stator core 17, and a groove 162 is formed between adjacent teeth 161. The stator coil 14 is wound around the teeth 161 and located within the grooves 162 on both sides of the teeth 161, achieving assembly.

[0060] The present invention also proposes a single-phase motor, the single-phase motor including a stator assembly, the stator assembly being the stator assembly described above.

[0061] See Figures 1-3 ,as well as Figures 7-8 As shown, in some embodiments, the rotor assembly 20 includes a shaft 21 and a rotor core 22, wherein the shaft 21 is disposed within the rotor core 22. Further, the stator assembly 10 also includes a base 12 and a bearing 13, and the base 12 includes a base boss 121, which is preferably a cylindrical structure; specifically, the stator core 17 is sleeved on the outer side of the base boss 121, and the bearing 13 is disposed on the inner side of the base boss 121; further, the shaft 21 is disposed on the bearing 13 and extends out of the base 12. Further, the rotor core 22 is sleeved on the outer side of the stator core 17 and can rotate together with the shaft 21. Further, the centerlines of the base boss 121, the bearing 13, and the stator core 17 coincide, and the assembly method of the base boss 121, the bearing 13, and the stator core 17 is an interference fit, which results in a more balanced force distribution and is beneficial to the stable operation of the shaft. Furthermore, a double-sided bearing is provided in the base boss 121, that is, a first side bearing is provided at the upper end of the base boss 121 and a second side bearing is provided at the lower end of the base boss 121, and the center lines of the first side bearing and the second side bearing coincide. In the above scheme, by designing double bearings to cooperate with the rotating shaft 21, the running stability of the motor is improved, its manufacturing precision and mechanical strength can be improved, thereby improving the problems of imbalance of the motor output shaft (rotating shaft) and unreasonable support structure design.

[0062] See Figure 7-8As shown, in some embodiments, the rotor assembly 20 further includes a rotor end ring 23 and a rotor end face 24, with one end of the rotating shaft 21 fixedly disposed at the center of the rotor end face 24. The rotor end ring 23 is disposed on the upper end face of the rotor core 22, and the rotor end face 24 is disposed on the lower end face of the rotor core 22, thus forming a support structure for the rotating shaft 21. By designing the rotor end face 24 and bearings to support the rotating shaft 21, abnormal noise generated during operation can be reduced. Furthermore, the rotor core 22 has rotor slots, and metal guide bars 25 are disposed within the rotor slots. One end of the metal guide bar 25 is connected to the rotor end ring 23, and the other end is connected to the rotor end face 24. This allows a closed loop to be formed between the rotor end ring 23 and the rotor end face 24. This loop of the metal conductor is in the rotating magnetic field generated by the stator, capable of cutting magnetic lines of force and generating an Ampere force to drive the rotor to rotate.

[0063] See Figure 7-8 As shown, in some embodiments, the rotating shaft 21, rotor end ring 23, rotor end face 24, and metal guide bar 25 are integral structures; specifically, the rotating shaft 21, rotor end ring 23, rotor end face 24, and metal guide bar 25 can be integrally formed by cooling and solidifying non-magnetic liquid metal material, thereby improving the problems of unreasonable design of rotating shaft and rotor support structure and poor material mechanical strength.

[0064] See Figure 6 and Figure 8 As shown, in some embodiments, to meet assembly structure requirements, the inner diameter b of the rotor core 22 is larger than the outer diameter a of the stator core 17; see also Figure 3 and Figure 7 As shown, the rotor core 22 and the stator core 17 are each made of multiple sheets of ferromagnetic material stacked together, which reduces eddy current losses in this application. Preferably, the ferromagnetic material is silicon steel sheet.

[0065] The present invention also provides an electric motor, which includes the aforementioned motor assembly. By using the aforementioned motor assembly, the production efficiency of the motor and the performance parameters of the motor can be improved.

[0066] In some embodiments, the motor is a single-phase asynchronous motor. Furthermore, the motor is an external rotor motor; using the above-described motor assembly can effectively improve the stability and reliability of the external rotor motor.

[0067] In view of the above-mentioned single-phase motor, the present invention also provides a method for manufacturing a single-phase motor, for manufacturing and assembling the single-phase motor; the manufacturing method includes the following processes:

[0068] S1: Solidify the non-magnetic liquid metal material to form an integrated structure of rotating shaft 21, rotor end ring 23, rotor end face 24 and metal guide bar 25;

[0069] S2: The rotor core 22 is placed in the inner cavity of the die-casting mold, and then liquid metal conductive material is injected into the mold groove of the die-casting mold, so that the rotor core 22, the rotating shaft 21, the rotor end ring 23, the rotor end face 24 and the metal guide bar 25 are integrally formed into the rotor assembly 20.

[0070] S3: Wind stator coils 14 around each tooth 161 on the stator core 17; connect the winding ends 143 and 144 of the stator coil 14 to the corresponding pins 18 on the tooth 161 respectively; fix the terminal block 15 to the pins 18 on each tooth 161 respectively to form a stator assembly 10; the connection between the terminal block 15 and the pins 18 is preferably welded; the stator coil 14 is preferably made of enameled copper wire or enameled aluminum wire.

[0071] S4: Press-fit the bearing 13 onto the inner side of the base 12 and press-fit the stator assembly 10 onto the outer side of the base 12;

[0072] S5: Press the rotating shaft 21 into the bearing 13 to complete the motor assembly; the center lines of the rotating shaft 21 and the bearing 13 coincide, and the assembly method is an interference fit.

[0073] In some embodiments, the method further includes stacking multiple sheets of ferromagnetic material to form a stator core 17 and a rotor core 22.

[0074] In some embodiments, the method further includes: forming a base 12 by injection molding through an injection mold, and forming a base boss 121 in the base 12; the injection molding material is preferably PBT or a highly malleable insulating material; specifically, the bearing 13 is press-fitted on the inner side of the base boss 121, and the stator assembly 10 is press-fitted on the outer side of the base boss 121.

[0075] The solution provided by this invention, by designing each pole of the main phase winding and the secondary phase winding to include multiple stator coils, allows the multiple stator coils to be independently wound on each tooth. This can shorten the wiring time of the coils and improve the winding efficiency of the stator core. At the same time, it can reduce the contact area between each winding coil and the tooth, thereby solving the problems of poor heat dissipation and high temperature of the motor, and effectively improving the performance parameters of the motor.

[0076] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that: The stator assembly (10) includes a stator (11) and a plurality of stator coils (14); the stator (11) includes a stator core (17), and the stator core (17) has a plurality of teeth (161) in the circumferential direction; the plurality of stator coils (14) are independently disposed on each of the teeth (161) to form a stator winding; the stator winding includes a main phase winding and a secondary phase winding; Each pole of the main phase winding and the secondary phase winding includes M stator coils (14); M satisfies: M≥2, and M is a positive integer; The M stator coils (14) are connected in series, and the M stator coils (14) are respectively disposed on adjacent teeth (161). The main phase winding and the secondary phase winding each include multiple ones, and the main phase winding and the secondary phase winding are alternately disposed on the stator core (17). The current directions of two adjacent primary phase windings are opposite, the current directions of two adjacent secondary phase windings are opposite, and the current directions of adjacent primary phase windings and secondary phase windings are opposite. Each of the teeth (161) is provided with a pin (18), the pin (18) including a first pin and a second pin; the wire end (143) of each stator coil (14) is connected to the first pin, and the wire end (144) of each stator coil (14) is connected to the second pin; the stator (11) also includes a terminal block (15), the terminal block (15) is fixedly connected to the pin (18) on each of the teeth (161) so that the coil wire on each of the teeth (161) is connected through the terminal block (15).

2. The stator assembly according to claim 1, characterized in that: Each pole winding is either an N-pole winding or an S-pole winding.

3. The stator assembly according to claim 1, characterized in that: The M satisfies: Z is the number of teeth (161) on the stator core (17), and Z satisfies: Z≥8 and Z is an even number; p is the number of pole pairs of the stator winding; m is the number of power supply phases.

4. The stator assembly according to claim 1, characterized in that: One end of the stator coil of the main phase winding and one end of the stator coil of the secondary phase winding are connected by a capacitor, and the other end of the stator coil of the main phase winding is connected to the other end of the stator coil of the secondary phase winding.

5. The stator assembly according to claim 1, characterized in that: Each of the teeth (161) is also provided with a first pin boss and a second pin boss respectively, with the first pin disposed on the first pin boss and the second pin disposed on the second pin boss.

6. The stator assembly according to claim 1, characterized in that: The plurality of teeth (161) are disposed on the circumferential direction of the outer side wall of the stator core (17).

7. A single-phase motor, comprising a stator assembly, characterized in that: The stator assembly is the stator assembly described in any one of claims 1 to 6.

8. The single-phase motor according to claim 7, characterized in that: The single-phase motor includes a rotor assembly (20), which includes a shaft (21) and a rotor core (22). The shaft (21) is disposed inside the rotor core (22). The stator assembly (10) also includes a base (12) and a bearing (13). The stator core (17) is sleeved on the outside of the base (12), and the bearing (13) is disposed on the inside of the base (12). The shaft (21) is disposed on the bearing (13) and extends out of the base (12). The rotor core (22) is sleeved on the outside of the stator core (17) and can rotate together with the shaft (21).

9. The single-phase motor according to claim 8, characterized in that: The rotor assembly (20) further includes a rotor end ring (23) and a rotor end face (24); the rotor end ring (23) is disposed on the upper end face of the rotor core (22), and the rotor end face (24) is disposed on the lower end face of the rotor core (22); the rotor core (22) is provided with a rotor slot, and a metal guide bar (25) is provided in the rotor slot; one end of the metal guide bar (25) is connected to the rotor end ring (23), and the other end of the metal guide bar (25) is connected to the rotor end face (24).

10. The single-phase motor according to claim 9, characterized in that: The rotating shaft (21), the rotor end ring (23), the rotor end face (24), and the metal guide bar (25) are integrally formed by solidifying a non-magnetic liquid metal material.

11. The single-phase motor according to any one of claims 8 to 10, characterized in that: The rotor core (22) and the stator core (17) are each made of multiple pieces of ferromagnetic material stacked together.

12. A method for manufacturing a single-phase motor, characterized in that: The single-phase motor is the single-phase motor according to any one of claims 7 to 11, and the manufacturing method includes the following process: S1: Solidify non-magnetic liquid metal material to form an integrated structure of rotating shaft (21), rotor end ring (23), rotor end face (24) and metal guide bar (25); S2: The rotor core (22) is placed in the inner cavity of the die-casting mold, and liquid metal conductive material is injected into the mold groove of the die-casting mold, so that the rotor core (22), the rotating shaft (21), the rotor end ring (23), the rotor end face (24) and the metal guide bar (25) are integrally formed into a rotor assembly (20). S3: Wind stator coils (14) around each tooth (161) on the stator core (17); connect the wire end (143) and the wire end (144) of the stator coil (14) to the corresponding pins (18) on the tooth (161); fix the terminal block (15) to the pins (18) on each tooth (161) to form a stator assembly (10). S4: Press the bearing (13) onto the inner side of the base (12) and press the stator assembly (10) onto the outer side of the base (12); S5: Press the rotating shaft (21) into the bearing (13) to complete the motor assembly.

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