Stator assembly, one-way motor and manufacturing method of one-way motor

Abstract

The invention provides a stator assembly, a single-phase motor and a manufacturing method of the single-phase motor. The stator assembly comprises a stator and a plurality of stator coils. The stator comprises a stator iron core, and a plurality of tooth parts are arranged in the circumferential direction of the stator iron core; the plurality of stator coils are respectively and independently arranged on each tooth part to form a stator winding; the stator winding comprises a main phase winding and an auxiliary phase winding; each pole winding of the main phase winding and the auxiliary phase winding comprises M stator coils; m is greater than or equal to 2, and M is a positive integer. According to the scheme provided by the invention, each pole of winding of the main phase winding and the auxiliary phase winding is designed to respectively comprise the plurality of stator coils, the plurality of stator coils can be respectively and independently wound on each tooth part and can be connected in various modes to form the stator winding, so that the wiring time of the coils can be shortened, and the winding efficiency of the stator iron core can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a stator assembly, a unidirectional motor and a manufacturing method thereof. Background Art

[0002] The existing single-phase asynchronous motor has a simple structure, low cost, low noise, and is easy to use. Therefore, it is widely used in various fields of industry and agriculture and people's daily life, especially in the fields of household appliances, electrical tools, medical equipment, etc. The stator winding of the single-phase asynchronous motor has two sets, one set is the main phase winding, and the other set is the auxiliary phase winding. The main phase winding and the auxiliary phase winding are respectively wound on the teeth of the stator core.

[0003] In the prior art, due to the limitations of the stator core structure design of the concentrated winding structure motor, the main phase winding and the auxiliary phase winding need to be wound sequentially on each single tooth portion in a specific order, resulting in a single wiring method, long wiring hours, low production efficiency, and failure to meet the market supply demand.

[0004] Since the stator assembly in the prior art has technical problems such as a single wiring method, the present invention studies 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 manufacturing method thereof, which can solve the technical problem of the single stator winding connection method in the prior art.

[0006] In order to solve the above problems, the present invention provides a stator assembly, which includes a stator and a plurality of stator coils; the stator includes a stator core, and the stator core is provided with a plurality of teeth in the circumferential direction; the plurality of stator coils are independently arranged on each tooth to form a stator winding; the stator winding includes a main phase winding and an auxiliary phase winding; each pole winding of the main phase winding and the auxiliary phase winding includes M stator coils respectively; M satisfies: M≥2, and M is a positive integer.

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

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

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

[0010] In some embodiments, 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 phases.

[0011] In some embodiments, the stator winding includes a main phase winding and an auxiliary phase winding, the main phase winding and the auxiliary phase winding each include a plurality of windings, and the main phase winding and the auxiliary phase winding are alternately arranged on the stator core; the current directions of two adjacent main phase windings are opposite, the current directions of two adjacent auxiliary phase windings are opposite, and the current directions of adjacent main phase windings and auxiliary phase windings are opposite.

[0012] In some embodiments, one end of the stator coil of the main phase winding and one end of the stator coil of the auxiliary phase winding are connected through 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 auxiliary phase winding.

[0013] In some embodiments, each tooth portion is provided with a pin, and the pins include a first pin and a second pin; the wire head winding end of each stator coil is connected to the first pin, and the wire tail winding end of each stator coil is connected to the second pin.

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

[0015] In some embodiments, a plurality of teeth are disposed on the circumference of the outer side wall of the stator core.

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

[0017] In some embodiments, a single-phase motor includes a rotor assembly, the rotor assembly includes a rotating shaft and a rotor core, the rotating shaft is arranged in the rotor core; the stator assembly also includes a base and a bearing; the stator core is sleeved on the outer side of the base, and the bearing is arranged on the inner side of the base; the rotating shaft is arranged on the bearing and extends out of the base; the rotor core is sleeved on the outer side of the stator core and can rotate with the rotating shaft.

[0018] In some embodiments, the rotor assembly further includes a rotor end ring and a rotor end face; the rotor end ring is arranged on the upper end face of the rotor core, and the rotor end face is arranged on the lower end face of the rotor core; a rotor slot is arranged on the rotor core, and a metal guide bar is arranged in the rotor slot, one end of the metal guide bar is connected to the rotor end ring, and the other end of the metal guide bar is connected to the rotor end face.

[0019] In some embodiments, the rotating shaft, the rotor end ring, the rotor end face, and the metal conductive bars are integrally formed by solidifying a non-magnetic metal liquid material.

[0020] In some embodiments, the rotor core and the stator core are respectively formed by laminating multiple pieces of ferromagnetic materials.

[0021] The present invention also provides a motor, which comprises the above-mentioned motor component.

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

[0023] In some embodiments, the electric motor is an outer rotor electric motor.

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

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

[0026] S2: placing the rotor core in the inner cavity of the die-casting mold, and then injecting liquid metal conductive material into the mold groove of the die-casting mold, so that the rotor core, the rotating shaft, the rotor end ring, the rotor end face and the metal guide bar are integrated into a rotor assembly;

[0027] S3: Winding stator coils on each tooth portion on the stator core; connecting the wire head winding end and the wire tail winding end of the stator coil to the pins corresponding to the teeth respectively; and fixing the terminal blocks to the pins on each tooth portion respectively, thereby forming a stator assembly;

[0028] S4: Press the bearing on the inner side of the base and press the stator assembly on the outer side of the base;

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

[0030] The present invention provides a stator assembly, a unidirectional motor and a manufacturing method thereof, which have the following beneficial effects:

[0031] 1. The solution provided by the present invention includes multiple stator coils in each pole winding of the main phase winding and the auxiliary phase winding, and the multiple stator coils can be independently wound on each tooth portion, thereby shortening the wiring time of the coils and improving the motor production efficiency. At the same time, the contact area between each coil and the tooth portion can be dispersed, solving the problems of low motor performance efficiency, poor heat dissipation performance, and increased motor temperature.

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

[0033] 3. The solution provided by the present invention makes the operation of the rotor more balanced and the mechanical strength better by designing the rotor and its supporting structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

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

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

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

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

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

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

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

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

[0043] Fig. 9 It is the stator coil distribution wiring diagram of the present invention;

[0044] Fig.10 It is the stator coil wiring principle diagram of the present invention;

[0045] Fig.11 It is a stator coil distribution expansion diagram of the present invention.

[0046] The accompanying drawings are marked as follows:

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

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0052] See also Figure 1-6As shown, according to an embodiment of the present invention, a stator assembly is provided, the stator assembly 10 comprising a stator 11 and a plurality of stator coils 14; wherein the stator 11 comprises 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 arranged in the circumferential direction of the outer wall of the stator core 17 or in the circumferential direction of the inner wall of the stator core 17, so as to form a winding structure; the winding structure comprises a main winding structure and a secondary winding structure. Further, the plurality of stator coils 14 are independently arranged on each tooth 161 to form a stator winding; the stator winding comprises a main phase winding and a secondary phase winding. Further, each pole winding of the main phase winding and the secondary phase winding comprises M stator coils 14, respectively, and the M satisfies: M≥2, and M is a positive integer; in this design, any M stator coils can be connected to form a stator winding, and the connection method is more flexible. Further, each pole winding can be an N-pole winding or an S-pole winding. Further, the stator winding includes a main phase winding 141 and an auxiliary phase winding 142; wherein the main phase winding 141 is arranged on the main winding structure, and each pole winding of the main phase winding 141 can be an N-pole winding or an S-pole winding; the auxiliary phase winding 142 is arranged on the auxiliary winding structure, and each pole winding of the auxiliary phase winding 142 can be an N-pole winding or an S-pole winding.

[0053] The present invention designs each pole winding of the main phase winding and the auxiliary phase winding to include a plurality of stator coils respectively. The plurality of stator coils can be independently wound on each tooth portion and can be connected in a variety of ways to form a stator winding, thereby shortening the wiring time of the coils and improving the winding efficiency of the stator core; at the same time, the contact area between each stator coil and the tooth portion can be dispersed, thereby solving the problems of low motor performance efficiency, poor heat dissipation performance, and increased motor temperature.

[0054] See also Figure 2-6 As shown, in some embodiments, M stator coils 14 are sequentially connected in series to achieve the same current direction on each pole winding. Further, the M stator coils 14 are respectively arranged on adjacent teeth 161, so that the coils of each pole winding of the stator winding can be efficiently wound and the connection and conduction between the stator coils are convenient.

[0055] See also Figure 2-6 As shown, in some embodiments, the number of teeth of the stator core of the single-phase asynchronous motor is determined by the number of power phases and the number of pole pairs, and the number of stator teeth Z for the concentrated structure winding satisfies: Z=2mp, where m is the number of power phases and p is the number of pole pairs of the stator winding. The design M of the present application 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; and m is the number of power phases. By adopting the above scheme, the connection method of each pole winding on the stator core is designed, thereby improving the magnetic potential and electric potential waveforms, reducing additional losses, and improving motor performance.

[0056] See also Figure 6 , Fig. 9 , Fig.10 as well as Fig.11 As shown, in some embodiments, the stator winding includes a main phase winding 141 and a secondary phase winding 142, and the main phase winding 141 and the secondary phase winding 142 respectively include a plurality of main phase windings 141, and the plurality of secondary phase windings 142 are connected by wires; the main phase winding 141 and the secondary phase winding 142 are alternately arranged on the winding structure of the stator core 17. Further, the main phase winding 141 and the secondary phase winding 142 respectively include a plurality of N-pole windings or S-pole windings, and the number of N-pole windings of the main phase winding 141 is equal to the number of S-pole windings of the secondary phase winding 142, and the number of S-pole windings of the main phase winding 141 is equal to the number of N-pole windings of the secondary phase winding 142; further, each N-pole winding or S-pole winding includes a plurality of stator coils connected in series, and the plurality of stator coils are respectively wound on each tooth portion 161 of the main winding structure. Preferably, with reference to Figure 6 and Fig.11 As shown in the example, 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 constitute the N-pole winding of the first main phase winding, and the N-pole winding of the second main phase winding includes two stator coils, namely 5 and 6 constitute the N-pole winding of the second main phase winding, and each stator coil 14 is arranged on a tooth. Figure 6 and Fig.11 As shown in the figure, for example, 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 constitute the S-pole winding of the first secondary phase winding, and the S-pole winding of the second secondary phase winding includes two stator coils, namely 7 and 8 constitute the S-pole winding of the second secondary phase winding, and each stator coil is arranged on a tooth. Furthermore, the current directions of the two adjacent main phase windings are opposite, the current directions of the two adjacent secondary phase windings are opposite, and the current directions of the adjacent main phase windings and secondary phase windings are opposite; each tooth 161 and its winding coil are independent, and there is no need to wind the wires tooth by tooth in a specific order, and the wires can be wound at the same time, thereby improving the winding efficiency.

[0057] See also Fig.10As shown, in some embodiments, one end of the stator coil of the main phase winding and one end of the stator coil of the auxiliary phase winding are connected through 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 auxiliary phase winding; further, the main phase winding and the auxiliary phase winding differ in spatial phase by 90° electrical angle, so that the winding forms a nearly circular rotating magnetic field. Furthermore, the main phase winding is directly connected to the other end of the auxiliary phase winding to form a common point, and one end of the capacitor and the common point are respectively connected to an external power supply. Definition of capacitance value Where u is the rated voltage, M is the turns ratio of the main and auxiliary windings, η is the motor efficiency, π is the circumference of pi, f is the power supply frequency, and p is the output power.

[0058] See also Figure 2-6 As shown, in some embodiments, at least two pin bosses 181 are provided on each tooth portion 161, and the pin bosses 181 are used to install the pins 18, and the installed pins 18 are used to connect the wire head winding end or the wire tail winding end of the coil on each tooth portion 161; further, the pin bosses 181 are preferably arranged on the upper end surface of the tooth portion 161, and are located at the two ends of the coil wound on the tooth portion 161. Specifically, a first pin boss and a second pin boss are respectively provided on each tooth portion 161, and the first pin boss and the second pin boss are respectively provided with pins 18; further, the pins 18 and the pin bosses 181 are connected by welding. Specifically, the wire head winding end 143 of the stator coil 14 is connected to the pin 18 on the first pin boss, and the wire tail winding 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 is an annular structure, and the outer diameter of the terminal block 15 is the same as the outer diameter of the stator core 17; further, the terminal block 15 is fixedly connected to the pins 18 on each tooth 161, so as to achieve positioning. In the above scheme, by providing a terminal block 15 on the end face of the stator core 17, and the terminal block 15 is connected to each tooth 161 through the pins 18, the coil wires on each tooth 161 can be connected through the terminal block 15, so as to meet the electrical connection and potential requirements of the scheme of the present application, and realize the efficient arrangement of the entire stator coil. Further, the stator 11 also includes a stator frame 16, which is mounted on the teeth 161 of the stator core 17, so that the coil of the stator coil 14 can be wound on the stator frame 16 to avoid direct contact with the teeth 161 of the stator core 17, which plays an insulating role.

[0059] See also Figure 3-6 , Figure 8As shown, in some embodiments, the stator core 17 is an integral cylindrical structure. The specific design position of the multiple teeth 161 can preferably be arranged on the circumference of the outer wall of the stator core 17, so as to facilitate the efficient winding installation of the stator coil. Specifically, the outer wall of the stator core 17 is provided with multiple teeth 161 protruding along its radial direction, and a groove 162 is formed between two adjacent teeth 161. The stator coil 14 is wound on the teeth 161 and is located in the grooves 162 on both sides of the teeth 161 to achieve assembly.

[0060] The present invention further provides a single-phase motor, which includes a stator assembly, and the stator assembly is the stator assembly mentioned above.

[0061] See also Figure 1-Figure 3 ,as well as Figure 7-Figure 8 As shown, in some embodiments, the rotor assembly 20 includes a rotating shaft 21 and a rotor core 22, wherein the rotating shaft 21 is disposed in 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, and the base boss 121 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 rotating 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 with the rotating shaft 21. Further, the center lines 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, so that the force is relatively balanced, which is conducive to the stable operation of the rotating 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 with each other; in the above scheme, by designing a double bearing to cooperate with the rotating shaft 21, the running stability of the motor is improved, and its manufacturing accuracy 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 also Figure 7-8As shown, in some embodiments, the rotor assembly 20 further includes a rotor end ring 23 and a rotor end face 24, and one end of the rotating shaft 21 is fixedly arranged at the center position of the rotor end face 24; wherein the rotor end ring 23 is arranged on the upper end face of the rotor core 22, and the rotor end face 24 is arranged on the lower end face of the rotor core 22, thereby forming a supporting structure for the rotating shaft 21; adopting the above scheme, the support of the rotating shaft 21 is formed by designing the rotor end face 24 and the bearing, which can reduce the abnormal noise generated by the rotating shaft during operation. Further, a rotor slot is provided on the rotor core 22, and a metal conductor 25 is provided in the rotor slot, one end of the metal conductor 25 is connected to the rotor end ring 23, and the other end of the metal conductor 25 is connected to the rotor end face 24, so that a closed loop can be formed between the rotor end ring 23 and the rotor end face 24, and the loop of the metal conductor is in the rotating magnetic field generated by the stator, which can cut the magnetic lines of force and generate Ampere force to drive the rotor to rotate.

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

[0064] See also Figure 6 and Figure 8 As shown, in some embodiments, to meet the assembly structure requirements, the inner diameter b of the rotor core 22 is greater than the outer diameter a of the stator core 17; see Figure 3 and Figure 7 As shown, the rotor core 22 and the stator core 17 are respectively formed by laminating multiple sheets of ferromagnetic materials, so that the eddy current loss can be reduced in the solution of the present application. Preferably, the ferromagnetic material is silicon steel sheet.

[0065] The present invention also provides a motor, which includes the aforementioned motor component. The use of the aforementioned motor component can improve the motor production efficiency and improve the motor performance parameters.

[0066] In some embodiments, the motor is a single-phase asynchronous motor. Further, the motor is an outer rotor motor, and the use of the motor assembly can effectively improve the stability and reliability of the outer rotor motor.

[0067] In view of the single-phase motor proposed above, the present invention further provides a method for manufacturing a single-phase motor, which is used to manufacture and assemble the single-phase motor; the manufacturing method comprises the following processes:

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

[0069] S2: placing the rotor core 22 in the inner cavity of the die-casting mold, and then injecting liquid metal conductive material 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 integrated into a rotor assembly 20;

[0070] S3: Winding the stator coil 14 on each tooth 161 on the stator core 17; connecting the wire head winding end 143 and the wire tail winding end 144 of the stator coil 14 to the pins 18 corresponding to the tooth 161 respectively; fixing the terminal block 15 to the pins 18 on each tooth 161 respectively, so as to form the stator assembly 10; the connection between the terminal block 15 and the pins 18 is preferably welded; the stator coil 14 is preferably enameled copper wire or enameled aluminum wire;

[0071] S4: press-fit the bearing 13 on the inner side of the base 12, and press-fit the stator assembly 10 on 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 with each other, and the assembly method is interference fit.

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

[0074] In some embodiments, it also includes: forming the 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 an insulating material with strong plasticity; specifically, the bearing 13 is pressed on the inner side of the base boss 121, and the stator assembly 10 is pressed on the outer side of the base boss 121.

[0075] The solution provided by the present invention is to design each pole winding of the main phase winding and the auxiliary phase winding to include multiple stator coils, so that the multiple stator coils can be independently wound on each tooth portion, thereby shortening the wiring time of the coils and improving the winding efficiency of the stator core; at the same time, the contact area between each winding coil and the tooth portion can be reduced to solve the problems of poor heat dissipation performance and temperature rise of the motor, and effectively improve the performance parameters of the motor.

[0076] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0077] The above description is only 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 principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that: The stator assembly (10) comprises a stator (11) and a plurality of stator coils (14); the stator (11) comprises a stator core (17), and the stator core (17) is provided with a plurality of teeth (161) in a circumferential direction; the plurality of stator coils (14) are independently arranged on each of the teeth (161) to form a stator winding; the stator winding comprises a main phase winding and a secondary phase winding; Each pole winding of the main phase winding and the auxiliary phase winding comprises M stator coils (14) respectively; M satisfies: M≥2, and M is a positive integer.

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

3. The stator assembly according to claim 1, characterized in that: The M stator coils (14) are connected in series in sequence.

4. The stator assembly according to claim 1, characterized in that: The M stator coils (14) are respectively arranged on adjacent teeth (161).

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

6. The stator assembly according to claim 1, characterized in that: The main phase winding and the auxiliary phase winding respectively include a plurality of windings, and the main phase winding and the auxiliary phase winding are alternately arranged on the stator core (17); the current directions of two adjacent main phase windings are opposite, the current directions of two adjacent auxiliary phase windings are opposite, and the current directions of adjacent main phase windings and auxiliary phase windings are opposite.

7. The stator assembly according to claim 6, characterized in that: One end of the stator coil of the main phase winding and one end of the stator coil of the auxiliary phase winding are connected via 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 auxiliary phase winding.

8. The stator assembly according to claim 1, characterized in that: Each tooth portion (161) is provided with a plug pin (18), the plug pin (18) comprising a first plug pin and a second plug pin; the wire head winding end (143) of each stator coil (14) is connected to the first plug pin, and the wire tail winding end (144) of each stator coil (14) is connected to the second plug pin.

9. The stator assembly according to claim 8, characterized in that: Each of the tooth portions (161) is also provided with a first pin boss and a second pin boss respectively, wherein the first pin is arranged on the first pin boss and the second pin is arranged on the second pin boss; the stator (11) further comprises a terminal block (15), wherein the terminal block (15) is respectively fixedly connected to the pins (18) on each of the tooth portions (161).

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

11. A single-phase motor, comprising a stator assembly, characterized in that: The stator assembly is the stator assembly according to any one of claims 1 to 10.

12. The single-phase motor according to claim 11, characterized in that: The single-phase motor comprises a rotor assembly (20), wherein the rotor assembly (20) comprises a rotating shaft (21) and a rotor core (22), wherein the rotating shaft (21) is arranged inside the rotor core (22); the stator assembly (10) further comprises a base (12) and a bearing (13); the stator core (17) is sleeved on the outer side of the base (12), and the bearing (13) is arranged on the inner side of the base (12); the rotating shaft (21) is arranged on the bearing (13) and extends out of the base (12); the rotor core (22) is sleeved on the outer side of the stator core (17) and can rotate together with the rotating shaft (21).

13. The single-phase motor according to claim 12, characterized in that: The rotor assembly (20) further comprises a rotor end ring (23) and a rotor end face (24); the rotor end ring (23) is arranged on the upper end face of the rotor core (22), and the rotor end face (24) is arranged 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 arranged 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).

14. The single-phase motor according to claim 13, characterized in that: The rotating shaft (21), the rotor end ring (23), the rotor end surface (24) and the metal conductive bar (25) are integrally formed by solidifying a non-magnetic metal liquid material.

15. The single-phase motor according to any one of claims 12 to 14, characterized in that: The rotor iron core (22) and the stator iron core (17) are respectively formed by laminating multiple pieces of ferromagnetic materials.

16. A method for manufacturing a single-phase motor, characterized in that: The manufacturing method comprises the following processes: S1: solidifying the non-magnetic metal liquid material to form an integrated structure of a rotating shaft (21), a rotor end ring (23), a rotor end face (24) and a metal guide bar (25); S2: placing the rotor core (22) in the inner cavity of a die-casting mold, and then injecting liquid metal conductive material 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 conductive bar (25) are integrated into a rotor assembly (20); S3: Winding a stator coil (14) around each tooth portion (161) on the stator core (17); connecting the wire head winding end (143) and the wire tail winding end (144) of the stator coil (14) to the corresponding pins (18) of the tooth portion (161); and fixing a terminal block (15) to the pins (18) on each tooth portion (161), thereby forming a stator assembly (10); S4: Press-fitting the bearing (13) onto the inner side of the base (12), and press-fitting the stator assembly (10) onto the outer side of the base (12); S5: Press-fit the rotating shaft (21) into the bearing (13) to complete the motor assembly.

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