Motor stator structure and motor

Abstract

The utility model discloses a motor stator structure and a motor. The motor stator structure comprises a stator iron core and a coil assembly, the coil assembly is installed on the stator iron core and protrudes out of the two opposite ends of the stator iron core in the axial direction of the coil assembly, the coil assembly comprises three phases of winding coils, and each phase of winding coil comprises at least two sets of coils. In each phase winding coil, at least two groups of coils are mutually connected in series to form an inter-pole wiring part, the three-phase winding coils are mutually connected through lead wires of the coils to form an inter-phase wiring part, and the inter-pole wiring part and the inter-phase wiring part are positioned between one end, far away from the stator core, of the coil assembly and the stator core along the axial direction of the stator core. The problem that the axial size of the three-phase asynchronous motor is large due to the fact that the windings of the three-phase asynchronous motor are connected through an axial row wiring method is solved.

Description

Technical Field

[0001] The present application relates to the technical field of drive devices, and more particularly, to a motor stator structure and a motor. Background Art

[0002] At present, the windings of three-phase asynchronous motors are mostly connected by an axial wiring method, resulting in a large axial occupied space of the windings and a large bearing span of the three-phase asynchronous motor, thus leading to a large axial dimension of the three-phase asynchronous motor. Summary of the Utility Model

[0003] The main object of the present application is to provide a motor stator structure and a motor to solve the problem that the axial dimension of the three-phase asynchronous motor is large due to the axial wiring method used for connecting the windings of the three-phase asynchronous motor mentioned in the background art.

[0004] According to one aspect of the present application, a motor stator structure is provided, including:

[0005] A stator core;

[0006] A coil assembly, which is installed on the stator core and protrudes from opposite ends of the stator core along its own axis. The coil assembly includes three-phase winding coils, and each phase of the winding coil includes at least two sets of coils;

[0007] In each phase of the winding coils, at least two sets of the coils are connected in series with each other to form a pole indirect connection part, and the three-phase winding coils are connected to each other through the leads of the coils to form a phase indirect connection part. Along the axis of the stator core, the pole indirect connection part and the phase indirect connection part are located between one end of the coil assembly away from the stator core and the stator core.

[0008] Further, the pole indirect connection part includes a first connection terminal and a second connection terminal, and the coil includes:

[0009] A first lead, which is located inside the coil along the radial direction of the stator core away from the stator core. In each phase of the winding coils, the first leads of two adjacent coils are bent to the inside or outside of the coil assembly along the radial direction of the stator core and are connected in series with each other to form the first connection terminal;

[0010] A second lead, which is located outside the coil along the radial direction of the stator core close to the stator core. In each phase of the winding coils, the second leads of two adjacent coils are bent to the outside of the coil assembly along the radial direction of the stator core and are connected in series with each other to form the second connection terminal.

[0011] Further, each phase of the winding coil includes a first coil and a second coil. The first coil is the first coil of the winding coil along the circumferential direction of the stator core, and the second coil is the last coil of the winding coil along the circumferential direction of the stator core. The second leads of the first coils and the second coils of the three-phase winding coils are all bent to the outside of the coil assembly along the radial direction of the stator core and are connected in a predetermined wiring structure to form the inter-phase wiring portion, where the predetermined wiring structure includes a star wiring structure or a delta wiring structure.

[0012] Further, the first connection terminal and the second connection terminal of at least one phase of the winding coil are located in the same plane.

[0013] Further, the winding coil includes:

[0014] A first-phase winding coil, where the first connection terminal and the second connection terminal of the first-phase winding coil are located in a first plane;

[0015] A second-phase winding coil, where the first connection terminal and the second connection terminal of the second-phase winding coil are located in a second plane;

[0016] A third-phase winding coil, where the first connection terminal and the second connection terminal of the third-phase winding coil are located in a third plane;

[0017] The first plane, the second plane, and the third plane are parallel to each other and are arranged in sequence along the axial direction of the stator core.

[0018] Further, along the axial direction of the stator core, there is a predetermined distance between the first plane and the second plane, and between the second plane and the third plane.

[0019] Further, the coil assembly further includes:

[0020] An insulating component, which is used for insulating and isolating the pole indirect wiring portions of two adjacent phases of the winding coils.

[0021] Further, the insulating component includes:

[0022] Mica tape, and the mica tape is provided on all three-phase winding coils and covers the outer surfaces of the first lead and the second lead.

[0023] Further, the insulating component further includes:

[0024] Anti-dizziness spacer, the anti-dizziness spacer includes at least two pieces, at least one piece of the anti-dizziness spacer is disposed between the first plane and the second plane, and at least one piece of the anti-dizziness spacer is disposed between the second plane and the third plane.

[0025] On the other hand, the present application also provides a motor, and the motor includes the motor stator structure described above.

[0026] In the present application, by making the pole-to-pole connection part and the phase-to-phase connection part located between one end of the coil assembly away from the stator core along the axial direction of the stator core and the stator core, the pole-to-pole connection part and the phase-to-phase connection part do not occupy space exceeding the axial direction of the coil assembly along the stator core, significantly reducing the occupied space of the coil assembly in the axial direction of the stator core, and thus significantly reducing the axial space of the motor, which is beneficial to reducing the axial size of the motor. At the same time, along the axial direction of the stator core, the present application limits the pole-to-pole connection part and the phase-to-phase connection part within the free space in the radial direction of the three-phase winding coil itself, further improving the integration degree of the coil assembly, ensuring that the internal structure of the motor is more compact, and being beneficial to improving the space utilization rate inside the motor. In addition, on the premise of not increasing the axial size of the motor, while reducing the occupied space of the coil assembly in the axial direction of the stator core, the present application can also increase the ventilation space of the motor, which is beneficial to providing a certain guarantee for the cooling of the motor stator structure. Description of the Drawings

[0027] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0028] Figure 1 is a cross-sectional view of the motor stator structure disclosed in the present application;

[0029] Figure 2 is Figure 1 an enlarged view of the P position in

[0030] Figure 3 is a schematic diagram of the coil assembly disclosed in the present application;

[0031] Figure 4 is a schematic diagram of the star connection structure disclosed in the present application;

[0032] Figure 5 is a schematic diagram of the delta connection structure disclosed in the present application;

[0033] Figure 6 is a schematic diagram of the first-phase winding coil disclosed in the present application;

[0034] Figure 7 is a schematic diagram of the second-phase winding coil disclosed in the present application;

[0035] Figure 8 Schematic diagram of the third-phase winding coil disclosed in this application.

[0036] Among them, the above-mentioned drawings include the following reference numerals:

[0037] 10. Stator core; 11. Windshield; 12. End cover; 20. Coil assembly; 201. First-phase winding coil; 202. Second-phase winding coil; 203. Third-phase winding coil; 21. Pole indirect connection part; 22. Phase indirect connection part; 23. First plane; 24. Second plane; 25. Third plane; 26. Anti-corona spacer; 30. Rotor assembly; 40. Cooler. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0039] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to this application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of this application. At the same time, it should be understood that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0041] As Figures 1 to 8 shown, this application provides a motor stator structure. The motor stator structure includes a stator core 10 and a coil assembly 20. The coil assembly 20 is installed on the stator core 10 and protrudes from the opposite ends of the stator core 10 along its axial direction. The coil assembly 20 includes three-phase winding coils. Each phase winding coil includes at least two groups of coils.

[0042] In each phase winding coil, at least two sets of coils are connected in series with each other to form a pole indirect connection part 21, and the three-phase winding coils are connected to each other through the leads of the coils to form a phase indirect connection part 22. Along the axial direction of the stator core 10, the pole indirect connection part 21 and the phase indirect connection part 22 are located between one end of the coil assembly 20 far from the stator core 10 and the stator core 10.

[0043] In this embodiment, by making the pole indirect connection part 21 and the phase indirect connection part 22 located between one end of the coil assembly 20 far from the stator core 10 along the axial direction of the stator core 10 and the stator core 10, the pole indirect connection part 21 and the phase indirect connection part 22 do not occupy the space exceeding the axial direction of the coil assembly 20 along the stator core 10, significantly reducing the occupied space of the coil assembly 20 in the axial direction of the stator core 10, and thus significantly reducing the axial space of the motor, which is beneficial to reducing the axial dimension of the motor. At the same time, along the axial direction of the stator core 10, the present application limits the pole indirect connection part 21 and the phase indirect connection part 22 within the free space in the radial direction of the three-phase winding coil itself, further improving the integration degree of the coil assembly 20, ensuring that the internal structure of the motor is more compact, and being beneficial to improving the space utilization rate inside the motor.

[0044] Among them, along the axial direction of the stator core 10, wind shields 11 are provided at both opposite ends of the stator core 10, and end covers 12 are provided on the side of each wind shield 11 far from the stator core 10. The space △NDE between the end cover 12 and the wind shield 11 is used for ventilation to take away the heat generated by the motor. Along the axial direction of the stator core 10, the present application arranges the pole indirect connection part 21 and the phase indirect connection part 22 between one end of the coil assembly 20 far from the stator core 10 and the stator core 10, which can reduce the axial occupied space of the coil assembly 20, and thus reduce the axial distance between the stator core 10 and the wind shield 11. Therefore, on the premise of not increasing the axial dimension of the motor, along the axial direction of the stator core 10, the distance between the stator core 10 and the end cover 12 remains unchanged, the distance △NDE between the end cover 12 and the wind shield 11 will increase, the ventilation area of the motor increases, which is beneficial to reducing the ventilation resistance and ventilation mechanical loss inside the motor, and thus reducing the total loss of the motor, the temperature rise of the coil assembly 20, etc., and improving the working efficiency of the motor.

[0045] Furthermore, the extremely indirect wiring portion 21 includes a first terminal and a second terminal. Each set of coils includes a first lead and a second lead. The first lead is located on the inner side of the coil radially away from the stator core 10 along the stator core 10. In each phase winding coil, the first leads of two adjacent coils are bent to the inner or outer side of the coil assembly 20 radially along the stator core 10 and are connected in series with each other to form the first terminal. The second lead is located on the outer side of the coil radially close to the stator core 10 along the stator core 10. In each phase winding coil, the second leads of two adjacent coils are bent to the outer side of the coil assembly 20 radially along the stator core 10 and are connected in series with each other to form the second terminal. This connection method arranges the first lead and the second lead on the inner and outer sides of the stator core 10 respectively, making full use of the radial space of the coil assembly 20 and reducing the occupied space of the coil assembly 20 in the axial direction of the stator core 10, thus achieving the purpose of reducing the axial space of the motor stator structure. In addition, this wiring method also facilitates the layout and installation of the coils, making the arrangement and connection between the coils more regular and tidy. To achieve the radial arrangement of the first terminal and the second terminal on the coil assembly 20, when winding each set of coils, it is necessary to reserve the length required for the first lead and the second lead to be bent radially outward along the stator core 10, and then perform insulation wrapping on the first lead and the second lead according to the insulation specifications.

[0046] Specifically, in each phase winding coil, when the number of sets of coils is two, the first leads on the inner sides of the two sets of coils are bent to the inner or outer side of the coil assembly 20 radially along the stator core 10 and are connected in series with each other to form the first terminal. When the number of sets of coils is four, the first leads of the first set of coils and the second set of coils are connected in series to form the first terminal, and the second leads of the second set of coils and the third set of coils are connected in series with each other to form the second terminal, and so on until all the coils are connected in series.

[0047] Further, each phase winding coil includes a first coil and a second coil. The first coil is the first coil of the winding coil along the circumferential direction of the stator core 10. The second coil is the last coil of the winding coil along the circumferential direction of the stator core 10. After the coils in each phase winding coil are connected in series, the remaining second leads of the first coil and the second coil will be used as the connection leads for connecting the phase winding coil to an external power supply respectively. Specifically, to save the space along the axial direction of the stator core 10 of the motor, in this embodiment, the second leads of the first coil and the second coil of the three-phase winding coils are both bent to the outside of the coil assembly 20 along the radial direction of the stator core 10 and are connected in a predetermined wiring structure to form an inter-phase wiring part 22. After the second leads of the first coil and the second coil of the three-phase winding coils are both bent to the outside of the coil assembly 20 along the radial direction of the stator core 10 and then connected, the second leads of the first coil and the second coil are both located between one end of the coil assembly 20 along the axial direction away from the stator core 10 and the stator core 10, making full use of the radial space of the coil assembly 20, reducing the occupied space of the coil assembly 20 in the axial direction of the stator core 10, which is beneficial to reducing the axial dimension L1 of the motor. Or, on the premise of not increasing the axial dimension L1 of the motor, the occupied space of the coil assembly 20 in the axial direction of the stator core 10 is reduced. Correspondingly, the ventilation area of the motor will increase. The increase in the ventilation area of the motor is beneficial to reducing the ventilation resistance and ventilation mechanical loss inside the motor, thereby reducing the total loss of the motor, the temperature rise of the coil assembly 20, etc., and improving the working efficiency of the motor. Specifically, before installing the first lead and the second lead, the first lead and the second lead can be bent to a predetermined angle first, and then insulated and bandaged according to the insulation specification before installation operations, etc. The first lead and the second lead need to be calculated and reserved with appropriate wiring lengths in advance so as to perform wiring operations, etc. more quickly and accurately.

[0048] As Figure 3 shown, in this embodiment, since the space between the coil assembly 20 and the inner wall surface of the motor along the radial direction of the stator core 10 is relatively large, in order to make full use of this space, in this embodiment, the inter-phase wiring part 22 is located on the side of the inter-pole wiring part 21 along the radial direction of the stator core away from the coil assembly 20.

[0049] As Figures 1 to 5 shown, among them, the predetermined wiring structure includes a star wiring structure or a delta wiring structure. The connection method of the star wiring structure is to connect the second leads of the second coils of the three-phase winding coils together, and then connect the second leads of the first coils of the three-phase winding coils to the three-phase power supply. Specifically, the second leads of the first coils of the three-phase winding coils are respectively set as U1 terminal, V1 terminal and W1 terminal, and the second leads of the second coils of the three-phase winding coils are respectively set as U2 terminal, V2 terminal and W2 terminal. Connect the U2 terminal, V2 terminal and W2 terminal with a shorting bar, and connect the U1 terminal, V1 terminal and W1 terminal to the three-phase power supply outside the motor respectively.

[0050] The connection method of the delta connection structure is to connect the W1 terminal and the U2 terminal with a shorting piece, and connect the W1 terminal to the first-phase power supply outside the motor; connect the U1 terminal and the V2 terminal with a shorting piece, and connect the U2 terminal to the first-phase power supply outside the motor; connect the V1 terminal and the W2 terminal with a shorting piece, and connect the V1 terminal to the third-phase power supply outside the motor.

[0051] Among them, the star connection structure has the advantages of uniform current distribution and small voltage fluctuation, and is suitable for occasions that require stable voltage and current. The delta connection structure has the advantages of high power factor and large torque, and is suitable for occasions that require high torque and efficiency. Or, the starting current of a motor with a large power is relatively large. To avoid excessive impact on the power grid, the star connection structure can be used for connection during starting, and the starting current is small. When the motor speed is close to the rated speed, it can be changed to the delta connection structure for connection. The motor can be optimized according to specific application requirements.

[0052] Furthermore, the first terminal and the second terminal of at least one phase winding coil are located in the same plane. Such a setting makes more full use of the radial space of the coil assembly 20 and reduces the space occupied by the axis of the coil assembly 20. At the same time, the terminal of each phase winding coil is installed in the same plane, which can greatly reduce the complexity and error rate of wiring.

[0053] As Figures 3 to 8 shown, furthermore, the winding coil includes a first-phase winding coil 201, a second-phase winding coil 202, and a third-phase winding coil 203. The first terminal and the second terminal of the first-phase winding coil 201 are located in the first plane 23. The first terminal and the second terminal of the second-phase winding coil 202 are located in the second plane 24. The first terminal and the second terminal of the third-phase winding coil 203 are located in the third plane 25. At the same time, the wiring work of each phase winding coil is on an independent plane, making the installation, wiring, and maintenance of the winding coil more modular. The winding coil of each phase can be wired independently, reducing the mutual interference between the multi-phase winding coils, making it more convenient for operations such as wiring and insulation wrapping, reducing the error rate of wiring, and also being conducive to reducing the complexity of the coil assembly 20 and making it more convenient to repair and manage the winding coils of each phase. Since the terminals are arranged axially in sequence, this layout method can make more effective use of the axial space of the stator core 10.

[0054] Among them, the first plane 23, the second plane 24, and the third plane 25 are parallel to each other and arranged in sequence along the axial direction of the stator core 10. Such an arrangement not only ensures that the coil assembly 20 does not occupy space beyond the axial direction of the stator core 10 along the coil assembly 20, reducing the axial dimension of the motor stator structure, but also can make full use of the axial space between one end of the coil assembly 20 away from the stator core 10 along the axial direction of the stator core 10 and the stator core 10. In addition, the first wiring terminals and the second wiring terminals of each phase are distributed on different planes, which also helps to improve the heat dissipation performance of the coil assembly 20. Heat can provide a channel for air flow through the gaps between the planes, enabling the heat generated by the coil assembly 20 to be better dispersed, which is beneficial to reducing the risk of local overheating.

[0055] Further, along the axial direction of the stator core 10, there is a predetermined distance B between the first plane 23 and the second plane 24, and between the second plane 24 and the third plane 25. The size of the predetermined distance B is positively correlated with the voltage level of the motor. The larger the voltage level of the motor, the larger the predetermined distance B. The smaller the voltage level of the motor, the smaller the predetermined distance B. By adjusting the size of the predetermined distance B, the winding coils can be protected from being broken down by excessive voltage and current, ensuring good insulation performance and heat dissipation effect between the winding coils. In addition, since the electromagnetic field decays as the distance increases when propagating in space, an appropriate predetermined distance B can reduce the mutual inductance between adjacent phases. By adjusting the predetermined distance B to an appropriate distance, the electromagnetic interference between the winding coils of different phases can be reduced, improving the electromagnetic performance of the motor. At the same time, the predetermined distance B also facilitates operations such as insulation wrapping and connection operations.

[0056] Further, the coil assembly 20 further includes an insulating component. The insulating component is used for insulating and isolating the pole indirect connection parts 21 of adjacent two-phase winding coils. When the predetermined distance B is small, by arranging an insulating component between the winding coils, the pole indirect connection parts 21 of adjacent two-phase winding coils can be insulated and isolated, reducing the risks such as aging and breakdown of the insulating material caused by excessive electromagnetic field intensity, and further improving the use safety of the motor.

[0057] Further, the insulating component includes mica tape. Mica tape is provided on all three-phase winding coils, and the mica tape covers the outer surfaces of the first lead and the second lead. Mica tape has an extremely high resistivity, can effectively isolate current and withstand a relatively high voltage without being broken down, can protect the first lead and the second lead from being broken down, and prevent phenomena such as short circuit and electric leakage in the motor stator structure, further improving the use safety of the motor.

[0058] Furthermore, the insulating component further includes a corona shield spacer 26. The corona shield spacer 26 includes at least two pieces. At least one corona shield spacer 26 is disposed between the first plane 23 and the second plane 24, and at least one corona shield spacer 26 is disposed between the second plane 24 and the third plane 25. The corona shield spacer 26 has high insulation. By arranging the corona shield spacer 26 between different planes, the corona shield spacer 26 can effectively isolate the current interference between different planes, ensure that the current between different planes flows along a predetermined path, thereby reducing the electromagnetic interference between different planes, further reducing the risk of electric leakage in the motor stator structure, etc., which is beneficial to improving the use safety of the motor.

[0059] On the other hand, the present application further provides a motor, which includes the above-mentioned motor stator structure. A cooler 40 is further provided on the motor, and the cooler 40 further accelerates the cooling of the motor. Therefore, the motor includes all the technical effects of the above-mentioned motor stator structure. Since the technical effects of the motor stator structure have been described in detail above, they will not be repeated here.

[0060] As Figures 1 to 8As shown, the motor stator structure and the motor provided by the present application can reduce the axial length of the coil assembly 20 and the occupied space of the coil assembly 20 along the axial direction of the stator core 10. Specifically, along the axial direction of the stator core 10, the reduced axial length of the coil assembly 20 provided by the present application accounts for 5% of the axial dimension L1 of the motor, significantly reducing the occupied space of the coil assembly 20 along the axial direction of the stator core 10. The present application arranges the first lead wire and the second lead wire on the inner and outer sides of the stator core 10 respectively, and the three-phase winding coils are arranged in sequence along the axial direction of the stator core 10, making full use of the radial space of the coil assembly 20. At the same time, the predetermined spacing B of the present application can be adjusted according to the voltage level of the motor, which greatly facilitates operations such as wiring and insulation wrapping of the winding coils. In addition, the present application can also reduce the spacing between the windshields 11 of the motor, thereby increasing the windshields 11 between the windshields 11 and the end plates. The present application can reduce the internal ventilation resistance and ventilation mechanical loss of the motor, which is beneficial to reducing the total loss of the motor, reducing the temperature rise of the motor winding and bearings, and improving the efficiency of the motor. The axial lengths of the first lead wire and the second lead wire of the present application along the stator core 10 are the same as the length of the non-lead part of the coil, which can make the assembly of the windshield 11 universal and simplify the manufacturing and assembly difficulty. On the premise of not increasing the axial dimension L1 of the motor and ensuring that the ventilation space of the motor is sufficient, the present application greatly shortens the axial dimension of the coil assembly 20, improves the power density of the motor, and improves the dynamic stability of the rotor assembly 30. The present application greatly shortens the axial dimension of the coil assembly 20, which is beneficial to shortening the axial dimension L1 of the motor and shortening the axial span between the two bearings on the relatively two sides of the motor along the axial direction, thereby reducing the material cost of the motor, improving the dynamic stability during the operation of the rotor assembly 30, and improving the volume power density of the motor. The second lead wires of the first coil and the second coil of the three-phase winding coils of the present application are both bent to the outside of the coil assembly 20 along the radial direction of the stator core 10 and are connected into a phase-interconnection part 22 according to a predetermined wiring structure. Such a setting can also make full use of the radial space of the coil assembly 20 along the stator core 10 for the connection between the first coil and the second coil, which is more beneficial to reducing the axial dimension of the motor stator structure.

[0061] Among them, the present application is applicable to three-phase asynchronous motors with high power and large size. Because the greater the power, the larger the radial space of the coil assembly 20 along the stator core 10, the more suitable it is for the present application, and the more fully the radial space is utilized. The present application can make the operation of the three-phase asynchronous motor better and the electrical safety stronger, which is more beneficial to improving the volume, power, density and economic benefits of the motor.

[0062] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0063] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0064] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A motor stator structure, characterized in that: include: Stator core (10); A coil assembly (20), the coil assembly (20) being mounted on the stator core (10) and protruding from two opposite ends of the stator core (10) along its own axial direction, the coil assembly (20) comprising three-phase winding coils, each phase of the winding coils comprising at least two groups of coils; In the winding coils of each phase, at least two groups of the coils are connected in series to form an inter-pole connection portion (21), and the three-phase winding coils are connected to each other through the lead wires of the coils to form an inter-phase connection portion (22). Along the axial direction of the stator core (10), the inter-pole connection portion (21) and the inter-phase connection portion (22) are located between an end of the coil assembly (20) away from the stator core (10) and the stator core (10).

2. The motor stator structure according to claim 1, characterized in that: The inter-pole wiring part (21) comprises a first wiring terminal and a second wiring terminal, and the coil comprises: a first lead wire, the first lead wire being located on the inner side of the coil away from the stator core (10) in the radial direction of the stator core (10), and the first lead wires of two adjacent coils in the winding coil of each phase being bent to the inner side or the outer side of the coil assembly (20) in the radial direction of the stator core (10) and connected in series to form the first terminal; The second lead wire is located on the outer side of the coil along the radial direction of the stator core (10) and close to the stator core (10). In the winding coil of each phase, the second lead wires of two adjacent coils are bent to the outer side of the coil assembly (20) along the radial direction of the stator core (10) and are connected in series to form the second terminal.

3. The motor stator structure according to claim 2, characterized in that: The winding coils of each phase include a first coil and a second coil, wherein the first coil is the first coil of the winding coil along the circumferential direction of the stator core (10), and the second coil is the last coil of the winding coil along the circumferential direction of the stator core (10), and the second leads of the first coil and the second coil of the three-phase winding coils are bent to the outer side of the coil assembly (20) along the radial direction of the stator core (10), and are connected to form the phase connection part (22) according to a predetermined connection structure, wherein the predetermined connection structure includes a star connection structure or a triangle connection structure.

4. The motor stator structure according to claim 2, characterized in that: The first connection terminal and the second connection terminal of the winding coil of at least one phase are located in the same plane.

5. The motor stator structure according to claim 2, characterized in that: The winding coil comprises: A first phase winding coil (201), wherein the first connection terminal and the second connection terminal of the first phase winding coil (201) are located in a first plane (23); A second phase winding coil (202), wherein the first connection terminal and the second connection terminal of the second phase winding coil (202) are located in a second plane (24); A third-phase winding coil (203), wherein the first connection terminal and the second connection terminal of the third-phase winding coil (203) are located in a third plane (25); The first plane (23), the second plane (24) and the third plane (25) are parallel to each other and are arranged in sequence along the axial direction of the stator core (10).

6. The motor stator structure according to claim 5, characterized in that: Along the axial direction of the stator core (10), there is a predetermined distance between the first plane (23) and the second plane (24), and between the second plane (24) and the third plane (25).

7. The motor stator structure according to claim 5 or 6, characterized in that: The coil assembly (20) further comprises: An insulating component is used to insulate and isolate the inter-pole connection parts of the winding coils of two adjacent phases.

8. The motor stator structure according to claim 7, characterized in that: The insulating component comprises: Mica tape, the three-phase winding coils are all provided with the mica tape, and the mica tape is coated on the outer surface of the first lead wire and the second lead wire.

9. The motor stator structure according to claim 7, characterized in that: The insulating component also includes: An anti-corona spacer (26), the anti-corona spacer (26) comprising at least two pieces, at least one of the anti-corona spacers (26) being arranged between the first plane (23) and the second plane (24), and at least one of the anti-corona spacers (26) being arranged between the second plane (24) and the third plane (25).

10. A motor, characterized in that: The motor comprises the motor stator structure according to any one of claims 1 to 9.

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