Winding structure, stator, axial motor, power assembly and output equipment

Abstract

The utility model provides a winding structure, a stator, an axial motor, a power assembly and output equipment. The winding structure is applied to the stator, the number of stator grooves of the stator is Z, and the number of magnetic pole pairs of the stator is P; comprising a plurality of conductor parts; main body parts of at least part of the conductor parts are connected in series through connecting wires; a plurality of layers of main body parts are stacked on the annular body in the axial direction, and a connecting line for connecting the two main body parts on the same layer is a connecting line on the same layer; in the connecting lines except the connecting lines on the same layer, the connecting line connected with the radial outer side end of the main body part is an outer side connecting line, and the connecting line connected with the radial inner side end of the main body part is an inner side connecting line; the pitch of the inner side connecting lines is Y1, the pitch of the outer side connecting lines is Y2, Y1 is not equal to Z / 2P, Y2 is not equal to Z / 2P, and Y1 + Y2 = Z / P. And one of the inner side connecting line and the outer side connecting line is a long distance, and the other one is a short distance, so that the harmonic wave of the winding structure is reduced, and the eddy current loss is effectively reduced.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and more specifically, relates to a winding structure, a stator, an axial motor, a power assembly and an output device. Background Art

[0002] An electric motor, such as an electric motor or a generator, has a stator and a rotor. Among them, the stator structure of some electric motors is mainly composed of a stator core and a winding wound on the stator core; and the axial motor has gained more and more attention due to its compact structure, high efficiency, and high power density. Existing motors usually have multiple slots on the stator core, each phase coil has multiple pole pairs and its corresponding winding is wound in each slot, and multiple coils are arranged in each slot in a stacked manner; among them, the use of flat wire windings can better adapt to the shape of the stator slots and improve the slot fill rate. However, the inner and outer connecting wires of the windings of the current axial motors are mostly full pitch, which makes the motor windings have large harmonics and large eddy current losses. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a winding structure, a stator, an axial motor, a power assembly and an output device to solve the problem of large winding harmonics and large eddy current losses of the axial motor in the related art.

[0004] In a first aspect, an embodiment of the present application provides a winding structure, which is applied to a stator, wherein the number of stator slots of the stator is Z, and the number of magnetic pole pairs of the stator is P; the winding structure includes a plurality of conductor components, and the plurality of conductor components are arranged in a ring shape;

[0005] The conductor component comprises a main body portion for being placed in the stator slot, the main body portion extending in the radial direction of the annular body, the main bodies of at least some of the conductor components in the plurality of conductor components are connected in series through connecting wires to form a winding, and lead wires are respectively provided at both ends of the winding;

[0006] The annular body is stacked with multiple main body parts in the axial direction, and the connecting line connecting two main body parts in the same layer is a same-layer connecting line; the connecting lines other than the same-layer connecting lines: the connecting line connecting the radial outer ends of the main body parts is an outer connecting line, and the connecting line connecting the radial inner ends of the main body parts is an inner connecting line;

[0007] The pitch of the inner connecting lines is Y1, the pitch of the outer connecting lines is Y2, and Y1≠Z / 2P, Y2≠Z / 2P, and Y1+Y2=Z / P.

[0008] In the technical solution of the embodiment of the present application, since most of the connecting wires are inner connecting wires and outer connecting wires, the pitch Y1 of the inner connecting wires of the winding is set equal, and the pitch Y2 of the outer connecting wires of the winding is set equal to facilitate processing and manufacturing, and the pitch Y1 of the inner connecting wires and the pitch Y2 of the outer connecting wires are not full pitches, and the sum of the pitch Y1 of the inner connecting wires and the pitch Y2 of the outer connecting wires is twice the full pitch, then one of the pitch Y1 of the inner connecting wires and the pitch Y2 of the outer connecting wires must be long and the other must be short, so as to reduce the harmonics of the winding structure and effectively reduce eddy current losses. In addition, it is also beneficial to reduce the end height of the short-distance connecting wire in the winding, reduce the copper loss of the winding and the volume of the motor using the winding structure, and improve the power torque density.

[0009] In some embodiments, the connecting wires are divided into first connecting wires and second connecting wires, the conductor components are arranged in pairs, and one end of the two main bodies of each pair of conductor components is connected in series through the first connecting wire; in the two pairs of conductor components connected in series, the other end of a main body in one pair of conductor components is connected to the other end of a main body in the other pair of conductor components through the second connecting wire, and the second connecting wire includes a same-layer connecting wire.

[0010] This structure facilitates the series connection of conductor components, especially the connection of two pairs of conductor components using the first connecting line, which makes the connection more convenient, and the other end of a main body in a pair of conductor components is connected to the other end of a main body in the other pair of conductor components through the second connecting line to connect the two pairs of conductor components in series, so that the other ends of the two main bodies in the middle of the two pairs of conductor components in series are connected using the second connecting line. The shape of the second connecting line can also be made first and then connected, which is also convenient for assembly and thus facilitates the production of the winding structure.

[0011] In some embodiments, the conductor component also includes an inner segment and an outer segment, the inner segment is connected to the radial inner end of the main body, and the outer segment is connected to the radial outer end of the main body; in the series-connected conductor components: one inner segment is connected to another inner segment to connect the corresponding two conductor components in series, and one outer segment is connected to another outer segment to connect the corresponding two conductor components in series.

[0012] The conductor component is provided with an inner section and an outer section to facilitate the series connection between the conductor components and the manufacture of the winding; in addition, the structure can also reduce the occupied space and reduce the volume of the winding structure.

[0013] In some embodiments, the two connected inner sections are integrally formed, and the two integrally formed inner sections constitute an inner connecting line, and the inner connecting line forms a first connecting line; the two connected outer sections constitute a second connecting line; the two main bodies connected by the second connecting line are in the same layer, then the second connecting line is a same-layer connecting line, and the remaining second connecting lines are outer connecting lines.

[0014] By forming the two inner sections as one piece, one wire can be used to preform the two conductor components and the inner connecting wire, and the inner connecting wire constitutes the first connecting wire, which is convenient for setting the first connecting wire and connecting the pair of conductor components in series. It can also reduce the height of the radial inner end of the winding and reduce copper loss. At the same time, it increases the envelope size of the radial inner end of the stator using the winding structure, expands the internal space of the stator, and improves the power torque density. In addition, the two outer sections are connected to form a second connecting wire so that the two pairs of conductor components are connected in series, which is also convenient for setting the second connecting wire.

[0015] In some embodiments, in the two pairs of conductor components connected in series: the two outer segments in the middle are connected by welding.

[0016] The two outer segments in the middle of the two pairs of conductor components that need to be connected in series are welded together, that is, the two outer segments forming the second connecting line are welded to improve the connection strength, make the two outer segments have good conductivity, reduce the impedance between the two outer segments, and facilitate connection.

[0017] In some embodiments, the two connected outer segments are integrally formed, and the two integrally formed outer segments constitute an outer connecting line, which forms a first connecting line; the two connected inner segments constitute a second connecting line; if the two main bodies connected by the second connecting line are in the same layer, then the second connecting line is a same-layer connecting line, and the remaining second connecting lines are inner connecting lines.

[0018] By forming the two outer sections as one piece, one wire can be used to preform the two conductor components and the outer connecting wire, and the outer connecting wire constitutes the first connecting wire, which is convenient for the setting of the first connecting wire and the series connection of the pair of conductor components. It can also reduce the height of the radial outer end of the winding, reduce copper loss and the envelope size of the radial outer end of the stator using the winding structure, and improve the power torque density of the motor using the stator. In addition, the two inner sections are connected to form a second connecting wire to connect the two pairs of conductor components in series, which is also convenient for the setting of the second connecting wire.

[0019] In some embodiments, in the two pairs of conductor components connected in series: the two inner segments in the middle are connected by welding.

[0020] The two inner segments in the middle of the two pairs of conductor components that need to be connected in series are welded together, that is, the two inner segments forming the second connecting line are welded to improve the connection strength, make the two inner segments have good conductivity, reduce the impedance between the two inner segments, and facilitate connection.

[0021] In some embodiments, the conductor component is made of flat wire in one piece.

[0022] The conductor component is made of flat wire in one piece, that is, the inner section, the main body and the outer section are formed in one piece of flat wire, which can facilitate the processing and manufacturing of the conductor component to maintain the uniformity of the resistivity along the length of the conductor component, reduce the impedance of the conductor component, and improve the conductive performance of the conductor component.

[0023] In some embodiments, along the axial direction of the annular body, lead wires connected to both ends of the winding formed by the main body parts connected in series are located in the same layer.

[0024] The lead wires are arranged at the same axial layer of the annular body formed by the winding structure to facilitate the connection and leading out of the lead wires and facilitate use.

[0025] In some embodiments, the annular body is stacked with N main body layers along the axial direction, and the two main body parts of each pair of conductor components are respectively located in the Mth layer and the M-1th layer; N is an even number, M is an even number, and N≥M.

[0026] An even number of layers of main body parts are arranged at the position of each main body part to increase the magnetic force of the winding structure when it is working; and the main body parts of each pair of conductor components are arranged at the Mth layer and the M-1th layer to facilitate the assembly of each pair of conductor components.

[0027] In some embodiments, along the axial direction of the annular body, the main body connected to the lead-out wire is in the lead-out layer, a layer away from the lead-out layer is a distal layer, the same-layer connecting wires in the lead-out layer are lead-out layer connecting wires, and the same-layer connecting wires in the distal layer are distal layer connecting wires; the lead-out layer is the 1st layer, and the distal layer is the Nth layer; or, the lead-out layer is the Nth layer, and the distal layer is the 1st layer.

[0028] The lead wires are arranged in the lead layer, and the lead layer is the first layer or the Nth layer along the axial direction of the annular body, which is convenient for connection and lead-out of the lead wires and convenient for use.

[0029] In some embodiments, the second connection line connecting the main body of the Tth layer and the main body of the T-1th layer is an interlayer connection line, T is an even number and N ≥ T; the second connection line connecting the main body of the Hth layer and the main body of the H+1th layer is a cross-layer connection line, H is an even number and N ≥ H; the number of main bodies connected in series is A, and the first main body and the Ath main body are respectively connected to the lead wires;

[0030] In the second connection line connecting the 2KPth main part and the 2KP+1th main part: the second connection line connecting the 2KNPth main part and the 2KNP+1th main part is a lead-out layer connection line, the second connection line connecting the (2K-1)NPth main part and the (2K-1)NP+1th main part is a far-end layer connection line, and the remaining second connection lines are cross-layer connection lines, A is a positive integer, K is a positive integer, and 2KNP <A,(2K-1)NP+1<A。

[0031] Through the above structure, the positions of the lead-out layer connection lines, the distal layer connection lines, the cross-layer connection lines and the inter-layer connection lines and the numbers of the connected main bodies can be easily determined to facilitate pre-processing and assembly connection.

[0032] In some embodiments, the cross-sectional shape of the main body is circular, elliptical or polygonal. Wherein, the cross-sectional shape of the main body is rectangular, and the main body is a flat wire conductor. The manufactured winding structure is applied to the stator, which can improve the slot fill rate of the stator.

[0033] The main body of this structure is convenient for selecting the shape of the main body and for manufacturing the winding structure.

[0034] In some embodiments, the conductor component is made of flat wire in one piece.

[0035] The conductor component is made of flat wire in one piece, which can facilitate the processing and manufacturing of the conductor component to maintain the uniformity of the resistivity along the length of the conductor component, reduce the impedance of the conductor component, and improve the conductive performance of the conductor component.

[0036] In some embodiments, each pair of conductor components is made of flat wire in one piece.

[0037] Each pair of conductor components arranged in pairs is integrally formed using a flat wire, that is, two conductor components are preformed using one flat wire, so as to facilitate processing and manufacturing, and also facilitate assembly of the conductor components to form a winding structure.

[0038] In some embodiments, the winding structure forms P pairs of magnetic poles, where P is a positive integer.

[0039] The magnetic pair number formed by the winding structure is set to a positive integer, and the number of magnetic pairs can be set as needed to facilitate the design and application scope of the winding structure.

[0040] In some embodiments, the number of the main body portions located in the same axial layer of the annular body and in the same magnetic pole is q, where q is a positive integer.

[0041] When the above structure is applied to the stator, the number of slots per pole per phase of the stator can be q, so as to facilitate the design and manufacture of the winding structure; q is a positive integer, and the number of slots per pole per phase is set as needed to improve the application scope of the winding structure design.

[0042] In some embodiments, when q≥2, the q main bodies located in the same axial layer of the annular body and in the same magnetic pole are arranged adjacent to each other.

[0043] By arranging q main bodies in the same layer and in the same magnetic pole adjacent to each other, the generated magnetic field can be more concentrated, thereby increasing the intensity of the generated magnetic field.

[0044] In some embodiments, the winding structure includes a single-phase winding, the winding being made using a plurality of conductor components connected in series;

[0045] Alternatively, the winding structure includes a multi-phase winding, the winding is made of a plurality of conductor components connected in series, the structure of each phase winding is the same, and the multi-phase winding is evenly distributed along the circumference of the winding structure.

[0046] The winding structure includes a single-phase winding, which has a simple structure and can be applied to a single-phase stator. When the winding structure includes a multi-phase winding, the multi-phase winding structure is set to be the same to simplify the structure of each phase winding, facilitate processing and manufacturing, and be applied to a multi-phase stator.

[0047] In some embodiments, each phase winding includes at least two parallel branches.

[0048] Each phase winding uses at least two parallel branches, and the current of the corresponding phase winding can be shared through each branch, so that the winding structure can withstand a larger working current, thereby improving the power torque of the motor using this winding structure. It can also reduce the number of series coil turns in each phase winding, thereby facilitating the adjustment of the motor power torque.

[0049] In a second aspect, an embodiment of the present application provides a stator, comprising a winding structure as described in any of the above embodiments.

[0050] The stator of the embodiment of the present application uses the above-mentioned winding structure, which is simplified and easy to assemble and manufacture.

[0051] In some embodiments, the stator further includes a stator core, and the stator core is provided with stator slots for accommodating a main body of the winding structure, and the main body is placed in the corresponding stator slots.

[0052] A stator core is provided and the main body is placed in the corresponding stator slot, which not only facilitates fixing the main body and thus installing a fixed winding structure, but also can enhance the magnetic field strength generated by the winding structure through the stator core, thereby improving the power of the axial motor using the stator.

[0053] In some embodiments, stator slots are provided on one axial side of the stator core; or, stator slots are provided on two opposite axial sides of the stator core.

[0054] A stator slot is arranged on one side of the stator core, and a winding structure can be installed on one side of the stator core, so as to be suitable for an axial motor in which a rotor is arranged on one side of the stator.

[0055] Stator slots are respectively arranged on opposite sides of the stator core, and winding structures can be respectively installed on opposite sides of the stator core, so as to be suitable for an axial motor in which rotors are respectively arranged on opposite sides of the stator.

[0056] In a third aspect, an embodiment of the present application provides an axial motor, comprising a rotating shaft, a rotor and a stator as described in any of the above embodiments, wherein the rotor is fixedly mounted on the rotating shaft, the stator is rotatably mounted on the rotating shaft, and the stator is located on the side of the rotor.

[0057] The axial motor of the embodiment of the present application uses the stator of the above-mentioned embodiment, and the structure is simplified, which can reduce the cost, improve the manufacturing efficiency, and reduce the size of the axial motor.

[0058] In some embodiments, a stator is disposed on at least one side of the rotor; and / or a rotor is disposed on at least one side of the stator.

[0059] Arranging the stator on at least one side of the rotor can facilitate the position layout of the stator. Arranging the rotor on at least one side of the stator can facilitate the position layout of the rotor.

[0060] In some embodiments, there are multiple rotors, and a stator is arranged between two adjacent rotors; and / or, there are multiple stators, and a rotor is arranged between two adjacent stators.

[0061] By providing multiple rotors, a multi-rotor axial motor structure can be realized. By providing multiple stators, a multi-rotor axial motor structure can be realized.

[0062] In a fourth aspect, an embodiment of the present application provides a power assembly, comprising a stator as described in any of the above embodiments; or comprising an axial motor as described in the above embodiments.

[0063] In a fifth aspect, an embodiment of the present application provides an output device, comprising a powertrain as described in the above embodiment.

[0064] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0066] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0067] Figure 2 This is a schematic diagram of the structure of an axial motor in some embodiments of the present application;

[0068] Figure 3 It is a schematic diagram of the structure of the axial motor of some other embodiments of the present application;

[0069] Figure 4 This is a schematic diagram of the structure of an axial motor according to some other embodiments of the present application;

[0070] Figure 5 It is a structural schematic diagram of an axial motor in some other embodiments of the present application;

[0071] Figure 6 This is a schematic diagram of the exploded structure of the stator in some embodiments of the present application;

[0072] Figure 7 This is a schematic diagram of the structure of the conductor component of some embodiments of the present application;

[0073] Figure 8 A schematic diagram of the structure of a pair of conductor components in some embodiments of the present application;

[0074] Fig. 9 A schematic diagram of the structure of a pair of conductor components in some other embodiments of the present application;

[0075] Fig.10 A schematic diagram of the wiring structure of the U-phase winding of the winding structure of some embodiments of the present application;

[0076] Fig.11 for Fig.10 Schematic diagram of the connection structure of the V-phase winding of the middle winding structure;

[0077] Fig.12 for Fig.10 Schematic diagram of the connection structure of the W-phase winding of the middle winding structure;

[0078] Fig.13 A schematic diagram of the wiring structure of the U-phase winding of the winding structure of some embodiments of the present application;

[0079] Fig.14 A schematic diagram of the wiring structure of a parallel branch of a U-phase winding of a winding structure in some embodiments of the present application;

[0080] Fig.15 for Fig.14 A schematic diagram of the wiring structure of another parallel branch of the U-phase winding of the middle winding structure;

[0081] Fig.16 A schematic diagram of the connection structure of a parallel branch of a U-phase winding of a winding structure in some other embodiments of the present application;

[0082] Fig.17 for Fig.16A schematic diagram of the wiring structure of another parallel branch of the U-phase winding of the middle winding structure;

[0083] Fig.18 A schematic diagram of the wiring structure of a parallel branch of a U-phase winding of a winding structure in some other embodiments of the present application;

[0084] Fig.19 for Fig.18 A schematic diagram of the wiring structure of another parallel branch of the U-phase winding of the middle winding structure;

[0085] Fig. 20 A schematic diagram of the connection structure of the U-phase winding of the winding structure of other embodiments of the present application;

[0086] Fig.21 A schematic diagram of the wiring structure of the U-phase winding of the winding structure of some further embodiments of the present application;

[0087] Fig. 22 A schematic diagram of the wiring structure of the U-phase winding of the winding structure of some other embodiments of the present application;

[0088] Fig.23 This is a schematic diagram of the connection structure of the U-phase winding of the winding structure in some further embodiments of the present application.

[0089] Among them, the main marks of the drawings in the figure are:

[0090] 1000-vehicle; 1001-powertrain; 100-axial motor; 200-transmission; 1002-controller; 1003-motor;

[0091] 10- rotor; 11- shaft;

[0092] 20- stator;

[0093] 21- stator core; 211- stator slot; 22- fixing bracket;

[0094] 30-winding structure; 300-ring body; 310-conductor component; 311-main body; 312-inner section; 313-outer section; G4-connecting wire; G401-inner connecting wire; G402-outer connecting wire; G403-same-layer connecting wire; G4031-remote-layer connecting wire; G4032-lead-out layer connecting wire; G41-first connecting wire; G42-second connecting wire; G421-inter-layer connecting wire; G422-cross-layer connecting wire; G5-lead-out wire. DETAILED DESCRIPTION

[0095] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0096] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0097] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0098] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0099] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0100] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces). "Several" means one or more than one, unless otherwise clearly and specifically defined.

[0101] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0102] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0103] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0104] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "adjacent" refers to proximity in position. For example, among the three components A1, A2 and B, if the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, or B is adjacent to A2. For another example, when there are multiple C components, the multiple C components are C1, C2, C... N When one of the C components, such as C2, is closer to the B component than other C components, then B is adjacent to C2, or it can be said that C2 is adjacent to B.

[0105] In the embodiments of the present application, the motor is also called an electric motor. The motor generally consists of a rotor and a stator. The motor is a device that converts electrical energy into mechanical energy, including a motor and a generator. The fixed part of the motor is called a stator, and the rotating part of the motor is called a rotor.

[0106] For an electric motor, the stator refers to the stationary part of the motor, which is used to generate a rotating magnetic field. The rotor refers to the rotating part of the motor, which is used to convert electrical energy into mechanical energy. The stator generally generates a rotating magnetic field through its windings to drive the rotor to rotate. The stator winding refers to the winding installed on the stator.

[0107] Some terms in the examples of this application are explained as follows.

[0108] Winding: It is a general term for multiple coils or coil groups that constitute one phase or the entire electromagnetic circuit.

[0109] Pole-phase group: In a motor, a group of coils is formed by connecting q coils in series belonging to the same phase winding at a pole pitch. The current direction and electromagnetic effect of each coil in the pole-phase group are the same, and this group of coils jointly generates the magnetic poles in the phase winding.

[0110] Phase winding: refers to a set of windings connected in series or parallel by one or more parallel branches according to the prescribed connection method. It is a coil assembly that constitutes one phase of a multi-phase winding.

[0111] The number of phases of the motor winding can be any positive integer, and there is no limit in theory. However, in practical applications, common motor winding phases include single-phase, three-phase, five-phase, six-phase, etc. The choice depends on the specific application scenario and requirements. A motor with only one phase winding is called a single-phase motor, and a motor with 2 or more phases is called a multi-phase motor. For multi-phase windings, the topological structure of the coil winding of each phase winding is basically the same to facilitate production. Among them, three-phase windings are the most common, and U, V, and W are generally used to distinguish three-phase windings, that is, the three-phase windings are U-phase windings, V-phase windings, and W-phase windings, respectively.

[0112] Parallel branch: A group or multiple groups of coils connected in a motor according to the prescribed connection method is called a parallel branch. For motors with low rated power, generally, all the pole-phase groups of the windings are connected in series in accordance with the prescribed connection method, and then connected to the power supply. However, for motors with larger rated power, the required current is relatively large. At this time, all the pole-phase groups of the windings must be connected in series into two or more branches, and then connected to the power supply in parallel according to the prescribed wiring method. This is a parallel branch. In other words, when the current required by the motor is large, all the pole-phase groups of the windings are connected in series into two or more branches, and then connected to the power supply in parallel according to the prescribed wiring method. In this way, the current borne by each branch will be reduced, thereby protecting the motor and the circuit.

[0113] Magnetic pole pair number: When the motor winding is powered on, a magnetic field will be generated, and magnetic poles will be formed accordingly. The magnetic poles appear in pairs of N poles and S poles, which is also called the magnetic pole pair number, or pole pair number for short. When the number of magnetic pole pairs is P, the number of magnetic poles is 2P, and the number of magnetic poles should be an even number.

[0114] Pole pitch: refers to the distance occupied by each magnetic pole of the motor along the circumferential surface of the air gap. The pole pitch can be expressed by the number of stator slots of the stator core. For example, the pole pitch is Z / 2P; Z is the total number of stator slots of the stator core, and P is the number of magnetic pole pairs. Stator slots refer to the slot structure provided on the stator core for winding coils.

[0115] Pitch: refers to the distance between the centers of the two effective sides of a coil on the stator circumference. If the number of stator slots is used, it is the number of slots between the two effective sides of a coil. Pitch can be represented by y, and the value of y is expressed in the number of slots. For example, y = 8, which is usually expressed in the form of (1-9) slots, that is, one side of the coil is embedded in the first slot, and the other side is embedded in the ninth slot. The distance between the center lines of the slots spanned by the two sides is 8 slots (the first slot and the ninth slot are each counted half).

[0116] When the pitch y is equal to the pole pitch, it is called the full pitch, also known as the full pitch; when the pitch y is smaller than the pole pitch, it is called the short pitch; when the pitch y is larger than the pole pitch, it is called the long pitch.

[0117] Span: refers to the distance between the two sides of the same element in the motor winding on the armature surface, usually expressed by the number of stator slots opened on the stator core.

[0118] Connecting wire: refers to the conductive wire that connects the two effective sides of the coil.

[0119] Connecting wire pitch: refers to the equivalent span between the conductors in the slots connected by the connecting wire. According to the different pitches spanned by the connecting wire, it can be divided into full pitch, short pitch and long pitch. Full pitch: refers to the connecting wire with a pitch equal to the pole pitch. Short pitch: refers to the connecting wire with a pitch less than the pole pitch. Long pitch: refers to the connecting wire with a pitch greater than the pole pitch.

[0120] Lead wire: refers to the conductive wire connecting the two ends of the winding to lead out the control circuit connected to the motor, which is used to supply power to the coil in the winding so that the coil generates a magnetic field.

[0121] Number of slots per pole per phase: The number of slots per pole per phase is generally represented by q. The number of slots per pole per phase is the number of slots occupied by each phase winding of the motor under each magnetic pole.

[0122] Electric motors can be divided into radial motors and axial motors. A radial motor is a motor in which the stator and the rotor are arranged radially, such as a motor in which the stator is located on the outer periphery of the rotor or the rotor is located on the outer periphery of the stator, that is, a motor in which the stator is sleeved on the outer periphery of the rotor or the rotor is sleeved on the outer periphery of the stator. Axial motors are motors in which the stator and the rotor are arranged axially. Axial motors are gaining more and more attention due to their compact structure, high efficiency, and high power density. For axial motors, the stator is located on the side of the rotor, and correspondingly, the rotor is also located on the side of the stator. For the convenience of description, the side of the rotor close to the stator is defined as the stator side, and the side of the stator close to the rotor is defined as the rotor side.

[0123] The stator generally includes a stator core and windings. The windings are wound on the stator core. In order to facilitate the winding of the windings, the stator core also has stator slots to accommodate the windings. The stator core can strengthen the magnetic field generated by the windings and increase the power of the stator. Of course, for some motors, in order to reduce weight, the stator core can be omitted and the magnetic field generated by the windings can be directly used to form a coreless stator.

[0124] The torque output of the motor is determined by the voltage applied to the winding wire, the density of the wire and the number of coils, and the maximum speed is determined by the amount of current flowing through the coils. The slot fill factor is the ratio of the cross-sectional area occupied by the copper wire in the stator slot to the total amount of space available in the bare slot. The biggest challenge in stator manufacturing is to maximize the amount of copper wire inserted into each slot (commonly known as the "slot fill factor") to maximize torque output.

[0125] The wire group made of flat wire can be called flat wire winding, which can better adapt to the shape of stator slots and improve slot fill rate. Flat wire refers to a wire with a width greater than thickness and a rectangular cross section.

[0126] The winding topology of the axial motor is to insert segments of flat wire into the stator slots of the stator core, and then use connecting wires to connect the segments of flat wire in series to make a winding structure on the stator core. Alternatively, segments of flat wire are inserted into a bracket corresponding to the stator slots, and then use connecting wires to connect the segments of flat wire in series to make a winding structure, which is then installed on the stator core. However, in the current winding structure, the pitch of the radially inner connecting wire and the radially outer connecting wire is mostly full pitch, which makes the motor winding harmonics larger and the eddy current loss larger, which affects the output efficiency of the motor.

[0127] Based on the above considerations, in order to solve the problem that most of the inner connecting wires and outer connecting wires of the winding of the axial motor are of full pitch, resulting in large harmonics and eddy current losses in the motor winding, an embodiment of the present application provides a winding structure, in which a plurality of conductor components are connected in series through connecting wires, and the pitch Y1 of the inner connecting wires of the windings is set equal, and the pitch Y2 of the outer connecting wires is set equal to facilitate processing and manufacturing; and the pitch Y1 of the inner connecting wires and the pitch Y2 of the outer connecting wires, one is set to a long distance and the other is set to a short distance, so as to reduce the harmonics of the winding structure and effectively reduce eddy current losses. In addition, it is also beneficial to reduce the end height of the short-distance connecting wire in the winding, reduce the copper loss of the winding and the volume of the motor using the winding structure, and improve the power torque density.

[0128] The stator disclosed in the embodiment of the present application can be used for an axial motor. The axial motor can be used as a power structure to be applied to a powertrain, an output device, etc. as a power source. The powertrain can also be applied to an output device. The output device can be, but is not limited to, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0129] The output device can be an electric vehicle or a vehicle chassis. The axial motor can be integrated with one or more of the power supply, controller, gearbox and other devices to form a powertrain.

[0130] For the convenience of explanation, an output device is provided in accordance with an embodiment of the present application, and the output device is explained by taking a vehicle as an example.

[0131] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A powertrain 1001 is provided inside the vehicle 1000, and the powertrain 1001 may be provided at the bottom, head or tail of the vehicle 1000. The powertrain 1001 may be used to provide driving force to the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a battery 1003, and the controller 1002 is used to control the operation of the powertrain 1001, for example, to control the start, speed change and stop of the powertrain 1001. The controller 1002 may also be used to control the battery 1003 to supply power to the powertrain 1001, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0132] In some embodiments, the powertrain 1001 includes an axial motor 100, and the axial motor 100 is used as a power source of the powertrain 1001. It can be understood that the powertrain 1001 is not limited to being used in the vehicle 1000, but can also be used in other devices that require power output.

[0133] In some embodiments, the powertrain 1001 may further include a transmission 200, which is connected to the axial motor 100 to achieve torque change of the axial motor 100. A transmission (English: Transmission), also known as a gearbox, is a mechanism used to change the speed and torque from an input device, and it can set the output shaft and input shaft transmission ratio at a fixed value or change the output shaft and input shaft transmission ratio.

[0134] In some embodiments, the controller 1002 may be integrated with the axial motor 100 to form a powertrain 1001 .

[0135] In some embodiments, the battery 1003 may be integrated with the axial electric machine 100 to form a powertrain 1001 .

[0136] In some embodiments, the transmission 200 and the controller 1002 may be integrated with the axial electric machine 100 to form a powertrain 1001 .

[0137] In some embodiments, the transmission 200, the controller 1002, and the battery 1003 may be integrated with the axial motor 100 to form a powertrain 1001. Of course, the powertrain 1001 may also integrate other structures, such as a thermal management device.

[0138] See also Figure 2 , Figure 2 A schematic diagram of the structure of an axial motor 100 provided in one embodiment of the present application.

[0139] An embodiment of the present application provides an axial motor 100 including a rotating shaft 11 , a stator 20 and a rotor 10 . The rotor 10 is fixedly mounted on the rotating shaft 11 , and the stator 20 is rotatably mounted on the rotating shaft 11 . The stator 20 is located on a side of the rotor 10 .

[0140] The rotating shaft 11 is a shaft for outputting power in the axial motor 100. The rotating shaft 11 is fixedly connected to the rotor 10 and can rotate driven by the rotor 10 to output power. The stator 20 is rotatably mounted on the rotating shaft 11 so that the rotating shaft 11 can rotate relative to the stator 20.

[0141] The stator 20 is located on the side of the rotor 10 , which means that the stator 20 is located on one side of the axial direction of the rotor 10 , so that the stator 20 drives the rotor 10 to rotate, and further drives the rotating shaft 11 to rotate.

[0142] The axial direction refers to the axial direction of the rotating shaft 11 , and the axial direction of the rotating shaft 11 is also the axial direction of the stator 20 and the axial direction of the rotor 10 . Therefore, the axial direction also refers to the axial direction of the rotor 10 .

[0143] The radial direction refers to the radial direction of the rotating shaft 11 , and the radial direction of the rotating shaft 11 is also the radial direction of the stator 20 and the radial direction of the rotor 10 . Therefore, the radial direction also refers to the radial direction of the rotor 10 .

[0144] The circumferential direction refers to the direction around the axis of the rotating shaft 11 , which is also the direction around the axis of the rotor 10 .

[0145] In some embodiments, there may be one rotor 10 and one stator 20, and the stator 20 is located on one side of the rotor 10. The axial motor 100 has a simple structure and a small volume. In this structure, the side of the rotor 10 close to the stator 20 is the stator side.

[0146] See also Figure 3 , Figure 3 A schematic diagram of the structure of an axial motor 100 provided in one embodiment of the present application.

[0147] In some embodiments, the axial motor 100 includes two stators 20 and a rotor 10, and the two stators 20 are located on opposite sides of the rotor 10, so that the same rotor 10 can be driven to rotate by the two stators 20 to improve the output power, and the structure of the axial motor 100 is more compact. In this structure, since the stators 20 are provided on opposite sides of the rotor 10, the opposite sides of the rotor 10 are both stator sides.

[0148] See also Figure 4 , Figure 4 A schematic diagram of the structure of an axial motor 100 provided in one embodiment of the present application.

[0149] In some embodiments, the axial motor 100 includes two rotors 10 and a stator 20, and the two rotors 10 are located on opposite sides of the stator 20, so that the two rotors 10 can be driven to rotate by one stator 20, and the same rotating shaft 11 can be driven to rotate, so as to improve the output power, and the structure of the axial motor 100 is more compact. In this structure, since the stator 20 is provided on one side of each rotor 10, the side of the rotor 10 close to the stator 20 is the stator side.

[0150] See also Figure 5 , Figure 5 A schematic diagram of the structure of an axial motor 100 provided in one embodiment of the present application.

[0151] In some embodiments, the axial motor 100 includes multiple rotors 10 and multiple stators 20, wherein a stator 20 is disposed between two adjacent rotors 10, and a rotor 10 is disposed between two adjacent stators 20, and multiple rotors 10 are driven to rotate by multiple stators 20, thereby driving the rotating shaft 11 to rotate, so as to increase the output power. In this structure, the side of each rotor 10 close to the stator 20 is the stator side.

[0152] See also Figure 6 , Figure 6 It is a schematic diagram of the exploded structure of the stator 20 according to some embodiments of the present application.

[0153] Please also read Figure 2 One embodiment of the present application provides a stator 20, including a stator core 21 and a winding structure 30. The winding structure 30 is mounted on the stator core 21, and a stator slot 211 is provided on the stator core 21 to install the winding structure 30. The winding structure 30 is arranged on the stator core 21 so as to generate a rotating magnetic field when in use. The stator core 21 is provided to facilitate the fixed installation of the winding structure 30, and the stator core 21 can be used to enhance the distribution and strength of the magnetic field generated by the winding structure 30, thereby improving the power of the axial motor 100 using the stator 20.

[0154] The stator core 21 can be made of magnetic conductive materials such as silicon steel sheets. For the stator core 21 of the axial motor 100, silicon steel sheets can be wound to reduce eddy current losses and improve the working efficiency of the axial motor 100 using the stator 20. Of course, the stator core 21 can also be made of other magnetic conductive materials.

[0155] In some embodiments, the stator 20 further includes a fixing bracket 22. The fixing bracket 22 refers to a structural member used to fix and support the stator core 21. The stator core 21 is mounted on the fixing bracket 22, and the fixing bracket 22 supports the stator core 21, and further supports the winding structure 30, so that the stator 20 can be installed and used.

[0156] In some embodiments, the fixing bracket 22 may be made of a steel plate, which can well support the stator core 21, and when connected, the stator core 21 and the fixing bracket 22 may be welded, so that the fixing bracket 22 can well support the stator core 21. In particular, when the stator core 21 is formed by winding silicon steel sheets, the fixing bracket 22 is welded to the stator core 21, and the shape of the stator core 21 can be fixed by the fixing bracket 22, so that the winding structure 30 can be installed on the stator core 21.

[0157] In some embodiments, a stator slot 211 is disposed on one axial side of the stator core 21 .

[0158] One side of the stator core 21 refers to one side along the axial direction of the stator core 21. The stator slot 211 is arranged on one side of the stator core 21, and the winding structure 30 can be installed on the side of the stator core 21 to form a stator 20 structure with winding arranged on one side.

[0159] A stator slot 211 is provided on one side of the stator core 21 , and a winding structure 30 may be installed on one side of the stator core 21 , so that the stator 20 using the stator core 21 may be suitable for the axial motor 100 , and the axial motor 100 may have a rotor 10 provided on one side of its stator 20 .

[0160] In some embodiments, please refer to Figure 4 Stator slots 211 are respectively provided on two opposite axial sides of the stator core 21 .

[0161] The opposite sides of the stator core 21 refer to the opposite sides along the axial direction of the stator core 21. Stator slots 211 are arranged on the opposite sides of the stator core 21, and winding structures 30 can be respectively installed on both sides of the stator core 21 to form a stator 20 structure with windings arranged on both sides.

[0162] Stator slots 211 are respectively arranged on opposite sides of the stator core 21, and winding structures 30 can be respectively installed on opposite sides of the stator core 21, so that the stator 20 using the stator core 21 can be suitable for the axial motor 100, and the axial motor 100 can be respectively arranged with rotors 10 on opposite sides of its stator 20.

[0163] See also Figures 6 to 12 The embodiment of the present application provides a winding structure 30, which is applied to the stator 20, the number of slots of the stator slots 211 of the stator 20 is Z, and the number of magnetic pole pairs of the stator 20 is P; the winding structure 30 includes a plurality of conductor components 310, and the plurality of conductor components 310 are arranged in a ring body 300; the conductor component 310 includes a main body 311, and the main body 311 is extended along the radial direction of the ring body 300. The main bodies 311 of at least some of the conductor components 310 are connected in series through a connecting wire G4, and lead wires G5 are respectively provided at both ends of the coil formed by the plurality of main bodies 311 connected in series. The annular body 300 has multiple layers of main body parts 311 stacked axially, and the connecting line G4 connecting two main body parts 311 of the same layer is the same-layer connecting line G403; the connecting lines G4 other than the same-layer connecting lines G403: the connecting line G4 connecting the radial outer end of the main body part 311 is the outer connecting line G402, and the connecting line G4 connecting the radial inner end of the main body part 311 is the inner connecting line G401; the pitch of the inner connecting line G401 is Y1, the pitch of the outer connecting line G402 is Y2, and Y1≠Z / 2P, Y2≠Z / 2P, Y1+Y2=Z / P.

[0164] The conductor component 310 refers to an electrical conductor made of a wire. The wire used to make the winding is generally made of metal copper so that the wire impedance is small and a larger current can pass through. It is understandable that the wire can also be made of other materials with good conductivity. For example, in some embodiments, the wire can be made of materials such as aluminum.

[0165] The ring body 300 refers to a structure that is in an annular shape as a whole. A plurality of conductor components 310 are arranged in an annular body 300: it means that the winding structure 30 made of these conductor components 310 is in an annular shape. When the winding structure 30 includes a single-phase winding, the single-phase winding is arranged and made using the conductor components 310, and is in an annular shape as a whole. In this case, the ring body 300 is the winding structure 30 as a whole. When the winding structure 30 includes a multi-phase winding, each phase winding is arranged and made using the conductor components 310, and each phase winding is in an annular shape as a whole, and the winding structure 30 formed by the multi-phase winding is also in an annular shape as a whole. In this case, the ring body 300 is a structure formed by one phase winding; and the ring bodies 300 formed by the multi-phase winding are combined to form the winding structure 30.

[0166] The axial direction of the annular body 300 is also the axial direction of the winding structure 30 . When the winding structure 30 is applied in the stator 20 , the axial direction of the winding structure 30 is also the axial direction of the stator 20 .

[0167] The main body 311 is a partial structure of the conductor component 310 , and is arranged to extend in the radial direction of the annular body 300 , so as to be applied in the axial motor 100 .

[0168] The connection line G4 is a conductive line or a conductive member connecting the two main body parts 311 .

[0169] The main bodies 311 of the plurality of conductor parts 310 are connected in series through the connecting wire G4, which means that the main bodies 311 of the conductor parts 310 are connected in series using the connecting wire G4 to form a complete coil winding structure 30. When these main bodies 311 are connected in series, there will be two main bodies 311 located at both ends of these main bodies 311 connected in series, and lead wires G5 are set on the two main bodies 311 located at the ends to connect the drive and control circuits, so as to supply power to the winding structure 30 to generate a magnetic field. The main bodies 311 are connected in series using the connecting wire G4, which is convenient for connection and installation of the main bodies 311. Even after the main bodies 311 are installed, they can be connected through the connecting wire G4 to form a coil winding, without the need to wind the conductor parts 310 into coils and then install them on the stator core 21, so as to facilitate the manufacture of the winding structure 30.

[0170] By setting a plurality of conductor components 310, and arranging the conductor components 310 in a ring-shaped body 300, it is convenient to arrange the positions of the conductor components 310; the main body 311 of the conductor component 310 is set radially, and the main bodies 311 of at least some of the conductor components 310 in the plurality of conductor components 310 are connected in series through a connecting line G4, and lead wires G5 are set at both ends of the plurality of main bodies 311 connected in series, which not only facilitates the position setting of the main body 311 of the conductor component 310, but also facilitates the setting of connecting the conductor component 310 in series with the lead wire G5, without the need for a complicated winding process, and the structure is simplified, which is convenient for assembly and preparation.

[0171] The annular body 300 is stacked with multiple main body parts 311 in the axial direction, which means that the positions corresponding to each main body part 311 are stacked with multiple main body parts 311 in the axial direction of the winding structure 30. When the winding structure 30 is installed on the stator core 21, multiple main body parts 311 are stacked in each stator slot 211 in the axial direction of the stator 20.

[0172] Most of the two main bodies 311 connected in series are located in two adjacent layers in the axial direction of the annular body 300, but some of the two main bodies 311 connected in series are located in the same layer in the axial direction of the annular body 300, and the connecting wire G4 connecting the two main bodies 311 in the same layer is the same-layer connecting wire G403. Since the main body 311 is arranged to extend radially along the annular body 300, and the connecting wire G4 connects multiple main bodies 311 in series to form a winding, in the same winding, the connecting wire G4 is either connected to the radial outer end of the main body 311 or to the radial inner end of the main body 311, that is, the same-layer connecting wire G403 is also located at the radial outer end or inner end of the main body 311. Among the connecting wires G4 other than the same-layer connecting wire G403: the connecting wire G4 connecting the radial outer end of the main body 311 is the outer connecting wire G402, and the connecting wire G4 connecting the radial inner end of the main body 311 is the inner connecting wire G401.

[0173] The pitch of the inner connecting wire G401 is Y1, the pitch of the outer connecting wire G402 is Y2, and Y1≠Z / 2P, Y2≠Z / 2P, Y1+Y2=Z / P, Z is the number of slots of the stator slot 211 of the stator 20 to which the winding structure 30 is applied, and P is the number of magnetic pole pairs of the stator 20, which is also the number of magnetic pole pairs formed by the winding structure 30. Y1, Y2, Z and P are all positive integers, Z / 2P is the pole pitch, Y1≠Z / 2P means that Y1 is not equal to Z / 2P, that is, the pitch Y1 of the inner connecting wire G401 is not equal to the pole pitch, that is, the pitch Y1 is not an integral pitch, and similarly, Y2≠Z / 2P means that Y2 is not equal to Z / 2P, that is, the pitch Y2 of the outer connecting wire G402 is not an integral pitch. Y1+Y2=Z / P means that the sum of Y1 and Y2 is equal to Z / P, that is, the sum of the pitch Y1 of the inner connecting wire G401 and the pitch Y2 of the outer connecting wire G402 is twice the pole pitch, so one of the pitch Y1 of the inner connecting wire G401 and the pitch Y2 of the outer connecting wire G402 must be long and the other short. Since most of the connecting wires G4 are the inner connecting wires G401 and the outer connecting wires G402, one of the pitch Y1 of the inner connecting wire G401 and the pitch Y2 of the outer connecting wire G402 is set to short and the other is set to long to reduce the use of full pitch, thereby reducing the harmonics of the winding structure 30 and suppressing the eddy current loss of the rotor 10. In addition, the height of the end of the short-distance connecting wire G4 in the winding can also be reduced to reduce copper loss.

[0174] In the technical solution of the embodiment of the present application, since most of the connecting wires G4 are inner connecting wires G401 and outer connecting wires G402, by setting the pitch Y1 of the inner connecting wires G401 of the winding to be equal, and setting the pitch Y2 of the outer connecting wires G402 of the winding to be equal, it is convenient for processing and manufacturing, and the pitch Y1 of the inner connecting wires G401 and the pitch Y2 of the outer connecting wires G402 are not full pitches, and the sum of the pitch Y1 of the inner connecting wires G401 and the pitch Y2 of the outer connecting wires G402 is twice the full pitch, then one of the pitch Y1 of the inner connecting wires G401 and the pitch Y2 of the outer connecting wires G402 must be long and the other short, so as to reduce the harmonics of the winding structure 30 and effectively reduce eddy current losses. In addition, it is also beneficial to reduce the end height of the short-distance connecting wire G4 in the winding, reduce the copper loss of the winding and the volume of the motor using the winding structure 30, and improve the power torque density.

[0175] See also Figures 10 to 12In some embodiments, the connecting line G4 is divided into a first connecting line G41 and a second connecting line G42, the conductor components 310 are arranged in pairs, and one end of the two main bodies 311 of each pair of conductor components 310 is connected in series through the first connecting line G41; in the two pairs of conductor components 310 connected in series, the other end of a main body 311 in one pair of conductor components 310 is connected to the other end of a main body 311 in the other pair of conductor components 310 through the second connecting line G42, and the second connecting line G42 includes the same-layer connecting line G403.

[0176] The first connection wire G41 refers to the connection wire G4 that connects one end of the main body portion 311 of the paired conductor member 310 .

[0177] The second connection line G42 refers to the connection line G4 that connects the two pairs of conductor components 310 in series, and the second connection line G42 connects the other ends of the two main body parts 311 in the middle of the two pairs of conductor components 310 in series to achieve the series connection of the two pairs of conductor components 310. The other end of one main body part 311 in a pair of conductor components 310 is connected to the other end of one main body part 311 in another pair of conductor components 310 through the second connection line G42 to achieve the series connection of the two pairs of conductor components 310. After the two pairs of conductor components 310 are connected in series, the other ends of the two main body parts 311 in the middle are connected in series through the second connection line G42.

[0178] The first connecting line G41 and the second connecting line G42 are provided to facilitate the series connection of the conductor components 310, especially the two pairs of conductor components 310 are connected using the first connecting line G41, which makes the connection more convenient. The other end of a main body 311 in a pair of conductor components 310 is connected to the other end of a main body 311 in another pair of conductor components 310 through the second connecting line G42 to connect the two pairs of conductor components 310 in series, which is also convenient for assembly and further facilitates the production of the winding structure 30.

[0179] See also Figure 6 and Figure 8 In some embodiments, the connecting wire G4 includes a first connecting wire G41 and a second connecting wire G42. The conductor components 310 are arranged in pairs, and one end of the main body 311 of the adjacent conductor components 310, especially the radial inner end, can be connected through the first connecting wire G41; the other end of the main body 311 of the adjacent conductor components 310, especially the radial outer end, can be connected through the second connecting wire G42. In this structure, the first connecting wire G41 is arranged on the radial inner side of the manufactured winding structure 30, and the second connecting wire G42 is located on the radial outer side of the manufactured winding structure 30.

[0180] See also Fig. 9In some embodiments, the connecting wire G4 includes a first connecting wire G41 and a second connecting wire G42. The conductor components 310 are arranged in pairs, and one end of the main body 311 of the adjacent conductor components 310, especially the radially outer end, can be connected through the first connecting wire G41; the other end of the main body 311 of the adjacent conductor components 310, especially the radially inner end, can be connected through the second connecting wire G42. In this structure, the first connecting wire G41 is arranged on the radially outer side of the manufactured winding structure 30, and the second connecting wire G42 is located on the radially inner side of the manufactured winding structure 30.

[0181] In some embodiments, the two conductor components 310 are configured as a pair of conductor components 310, and the two conductor components 310 in the pair of conductor components 310 are connected to each other through the first connecting wire G41. Multiple pairs of conductor components 310 are sequentially connected in series through the second connecting wire G42 to form a winding coil of one phase.

[0182] See also Figure 6 and Figure 7 In some embodiments, the conductor component 310 also includes an inner segment 312 and an outer segment 313, the inner segment 312 is connected to the radial inner end of the main body 311, and the outer segment 313 is connected to the radial outer end of the main body 311; in the series-connected conductor components 310: one inner segment 312 is connected to another inner segment 312 to connect the corresponding two conductor components 310 in series, and one outer segment 313 is connected to another outer segment 313 to connect the corresponding two conductor components 310 in series.

[0183] The radial inner side refers to the side along the radial direction of the stator 20 and close to the center of the stator 20; it also refers to the side along the radial direction of the winding structure 30 and close to the center of the annular winding structure 30. The radial outer side is the side opposite to the radial inner side, that is, the side along the radial direction of the winding structure 30 and away from the center of the annular winding structure 30. The radial direction of the annular body 300 is consistent with the radial direction of the winding structure 30. When the winding structure 30 is applied to the stator 20, the radial direction of the winding structure 30 is on the radial side of the stator 20.

[0184] The conductor component 310 is provided with an inner section 312 and an outer section 313 to facilitate the series connection between the conductor components 310 and to facilitate the production of the winding; in addition, the structure can also reduce the occupied space and reduce the volume of the winding structure 30.

[0185] See also Figure 6 , Figure 8 , Figures 10 to 12In some embodiments, the two connected inner sections 312 are integrally formed, and the two integrally formed inner sections 312 constitute an inner connecting line G401, and the inner connecting line G401 forms a first connecting line G41; the two connected outer sections 313 constitute a second connecting line G42; when the two main bodies 311 connected by the second connecting line G42 are in the same layer, the second connecting line G42 is the same-layer connecting line G403, and the remaining second connecting lines G42 are outer connecting lines G402.

[0186] The two connected inner sections 312 are integrally formed, which means that the inner sections 312 of a pair of conductor components 310 are integrally formed, and the pair of conductor components 310 are also integrally formed, and the two integrally formed inner sections 312 constitute the inner connecting wire G401, so as to facilitate the processing, manufacturing and connection of the conductor component 310. The inner connecting wire G401 forms the first connecting wire G41, that is, the inner connecting wire G401 also serves as the first connecting wire G41, and is also convenient for winding and manufacturing the winding.

[0187] Since the outer segments 313 are connected to the outer segments 313, and the inner segments 312 are connected to the inner segments 312 to realize the series connection of multiple conductor components 310, and the two adjacent inner segments 312 constitute the inner connecting line G401, and the inner connecting line G401 also serves as the first connecting line G41, the two connected outer segments 313 form the second connecting line G42, and among these second connecting lines G42, the two main bodies 311 connected by the second connecting line G42 are in the same layer, and the second connecting line G42 is the same layer connecting line G403, and the remaining second connecting lines G42 are outer connecting lines G402. In other words, among any two connected outer segments 313: the main bodies 311 corresponding to the two outer segments 313 are in the same layer, and the two outer segments 313 are connected to form the same layer connecting line G403, and the main bodies 311 corresponding to the two outer segments 313 are in different layers, and the two outer segments 313 are connected to form the outer connecting line G402.

[0188] By integrally forming the two inner sections 312, one wire can be used to preform the two conductor components 310 and the inner connecting wire G401. The inner connecting wire G401 constitutes the first connecting wire G41, which facilitates the setting of the first connecting wire G41 and the series connection of the pair of conductor components 310. It can also reduce the height of the radial inner end of the winding and reduce copper loss. At the same time, it increases the envelope size of the radial inner end of the stator 20 using the winding structure 30, expands the internal space of the stator 20, and improves the power torque density. In addition, the two outer sections 313 are connected to form the second connecting wire G42, so that the two pairs of conductor components 310 are connected in series, which is also convenient for the setting of the second connecting wire G42.

[0189] In some embodiments, in the two pairs of conductor components 310 connected in series: the two outer segments 313 in the middle are connected by welding.

[0190] The two outer segments 313 in the middle of the two pairs of conductor components 310 that need to be connected in series are welded together, that is, the two outer segments 313 that form the second connecting line G42 are welded to improve the connection strength, make the two outer segments 313 have good conductivity, reduce the impedance between the two outer segments 313, and facilitate connection.

[0191] In some embodiments, the conductor component 310 also includes an inner segment 312 and an outer segment 313, the inner segment 312 is connected to the radial inner end of the main body 311, and the outer segment 313 is connected to the radial outer end of the main body 311, and the two inner segments 312 of each pair of conductor components 310 are connected to form a first connecting line G41; in the two pairs of conductor components 310 connected in series, the outer segment 313 of the main body 311 of one pair of conductor components 310 is connected to the outer segment 313 of the main body 311 of the other pair of conductor components 310 to form a second connecting line G42.

[0192] The conductor component 310 is provided with an inner section 312 and an outer section 313, and the two inner sections 312 of each pair of conductor components 310 are connected to form a first connection line G41, that is, the two inner sections 312 of the two conductor components 310 connected in series are connected to form the first connection line G41, for example, the two inner sections 312 are welded to form the first connection line G41, so as to facilitate the setting of the first connection line G41 and the series connection of the pair of conductor components 310. It can be understood that the first connection line G41 can also be separately provided to connect the main bodies 311 of the two conductor components 310 in pairs.

[0193] The two outer segments 313 in the middle of the two pairs of conductor components 310 that need to be connected in series are connected to form a second connection line G42, that is, the two outer segments 313 are connected to form the second connection line G42, for example, the two outer segments 313 are welded to form the second connection line G42, so that the two pairs of conductor components 310 are connected in series, which is also convenient for setting the second connection line G42, that is, the two outer segments 313 of the two conductor components 310 connected in series are connected to form the second connection line G42. It can be understood that the second connection line G42 can also be set separately to connect the two main body parts 311 in the middle of the two pairs of conductor components 310 connected in series.

[0194] See also Fig. 9 and Fig. 22In some embodiments, the two connected outer segments 313 are integrally formed, and the two integrally formed outer segments 313 constitute an outer connecting line G402, and the outer connecting line G402 forms a first connecting line G41; the two connected inner segments 312 constitute a second connecting line G42; the two main bodies 311 connected by the second connecting line G42 are in the same layer, then the second connecting line G42 is the same-layer connecting line G403, and the remaining second connecting lines G42 are inner connecting lines G401.

[0195] The two connected outer segments 313 are integrally formed, which means that the outer segments 313 of a pair of conductor components 310 are integrally formed, and the pair of conductor components 310 are also integrally formed, and the two integrally formed outer segments 313 constitute the outer connecting wire G402, so as to facilitate the processing, manufacturing and connection of the conductor component 310. In this case, the outer connecting wire G402 forms the first connecting wire G41, that is, the outer connecting wire G402 also serves as the first connecting wire G41, and is also convenient for winding and manufacturing the winding.

[0196] Since the two adjacent outer segments 313 constitute the outer connecting line G402, and the outer connecting line G402 also serves as the first connecting line G41, the two connected inner segments 312 form the second connecting line G42. Among these second connecting lines G42, the two main bodies 311 connected by the second connecting line G42 are in the same layer, and the second connecting line G42 is the same layer connecting line G403, and the remaining second connecting lines G42 are the inner connecting lines G401. In other words, among any two connected inner segments 312: the main bodies 311 corresponding to the two inner segments 312 are in the same layer, and the two inner segments 312 are connected to form the same layer connecting line G403; the main bodies 311 corresponding to the two inner segments 312 are in different layers, and the two inner segments 312 are connected to form the inner connecting line G401.

[0197] By integrally forming the two outer segments 313, one wire can be used to preform the two conductor components 310 and the outer connecting wire G402, and the outer connecting wire G402 constitutes the first connecting wire G41, which facilitates the setting of the first connecting wire G41 and the series connection of the pair of conductor components 310, and can also reduce the height of the radial outer end of the winding, reduce copper loss and the envelope size of the radial outer end of the stator using the winding structure 30, and improve the power torque density of the motor using the stator; in addition, the two inner segments 312 are connected to form the second connecting wire G42, so that the two pairs of conductor components 310 are connected in series, which is also convenient for the setting of the second connecting wire G42.

[0198] In some embodiments, in the two pairs of conductor components 310 connected in series, the two inner segments 312 in the middle are connected by welding.

[0199] The two inner segments 312 in the middle of the two pairs of conductor components 310 that need to be connected in series are welded together, that is, the two inner segments 312 that form the second connecting line G42 are welded to improve the connection strength, make the two inner segments 312 have good conductivity, reduce the impedance between the two inner segments 312, and facilitate connection.

[0200] In some embodiments, the conductor component 310 includes an inner segment 312 and an outer segment 313, and the two outer segments 313 of each pair of conductor components 310 are connected to form a first connecting line G41; in the two pairs of conductor components 310 connected in series, the inner segment 312 of a main body 311 in one pair of conductor components 310 is connected to the inner segment 312 of a main body 311 in the other pair of conductor components 310 to form a second connecting line G42.

[0201] The two outer sections 313 of each pair of conductor components 310 are connected to form a first connection line G41, that is, the two outer sections 313 of the two conductor components 310 connected in series are connected to form the first connection line G41, for example, the two outer sections 313 are welded to form the first connection line G41, so as to facilitate the setting of the first connection line G41 and the series connection of the pair of conductor components 310. It can be understood that the first connection line G41 can also be set separately to connect the main parts 311 of the two conductor components 310 in pairs.

[0202] The two inner sections 312 in the middle of the two pairs of conductor components 310 that need to be connected in series are connected to form a second connection line G42, that is, the two inner sections 312 are connected to form the second connection line G42, such as welding the two inner sections 312 to form the second connection line G42, so that the two pairs of conductor components 310 are connected in series, which is also convenient for setting the second connection line G42, that is, the two inner sections 312 of the two conductor components 310 in series are connected to form the second connection line G42. It can be understood that the second connection line G42 can also be set separately to connect the two main body parts 311 in the middle of the two pairs of conductor components 310 in series.

[0203] See also Figures 6 to 12 In some embodiments, along the axial direction of the annular body 300 , the lead wires G5 connected to both ends of the winding formed by the main body 311 connected in series are located in the same layer.

[0204] The lead wire G5 is arranged at the same axial layer of the annular body 300 formed by the winding structure 30 to facilitate the connection and lead-out of the lead wire G5 and facilitate use.

[0205] In some embodiments, the annular body 300 is stacked with N layers of main bodies 311 along the axial direction, and the two main bodies 311 of each pair of conductor components 310 are respectively located at the Mth layer and the M-1th layer; N is an even number, M is an even number, and N≥M.

[0206] The annular body 300 is stacked with N layers of main body parts 311 along the axial direction, which means that N layers of main body parts 311 are stacked along the axial direction of the winding structure 30 at the position corresponding to each main body part 311. When the winding structure 30 is installed on the stator core 21, N layers of main body parts 311 are stacked in each stator slot 211 along the axial direction of the stator 20.

[0207] By arranging the two main bodies 311 of the paired conductor components 310 on the Mth layer and the M-1th layer respectively, the installation positions of the paired conductor components 310 can be clearly identified, which facilitates the installation and fixation of the main bodies 311 of the paired conductor components 310 .

[0208] The position of each main body portion 311 is set to an even-numbered layer of main body portions 311 to increase the magnetic force of the winding structure 30 when it is working; and the main body portions 311 of each pair of conductor components 310 are set at the Mth layer and the M-1th layer, which can facilitate the assembly of each pair of conductor components 310 in the entire winding structure 30.

[0209] In some embodiments, along the axial direction of the annular body 300, the main body 311 connected to the lead-out line G5 is in the lead-out layer, a layer away from the lead-out layer is the distal layer, the same-layer connecting line G403 in the lead-out layer is the lead-out layer connecting line G4032, and the same-layer connecting line G403 in the distal layer is the distal layer connecting line G4031; if the lead-out layer is the 1st layer, the distal layer is the Nth layer; or, if the lead-out layer is the Nth layer, the distal layer is the 1st layer.

[0210] Along the axial direction of the ring body 300, among the stacked N layers of main body parts 311: the main body part 311 connected to the lead wire G5 is in the lead layer, which means that the layer where the main body part 311 connected to the lead wire G5 is located is defined as the lead layer; and the layer far away from the lead layer is defined as the distal layer. Fig.17 and Fig.18 For example, when the winding structure 30 is installed on the stator core 21, the main body 311 is stacked in the corresponding stator slot 211 of the stator core 21, when the lead-out layer is located at the bottom of the stator slot 211, the distal layer is located at the mouth of the stator slot 211; and when the lead-out layer is located at the mouth of the stator slot 211, the distal layer is located at the bottom of the stator slot 211.

[0211] Since the two main bodies 311 of the paired conductor components 310 are located at the Mth layer and the M-1th layer respectively, the connection line G4 at the lead-out layer and the connection line G4 at the remote layer are both second connection lines G42. The second connection line G42 at the lead-out layer is defined as the lead-out layer connection line G4032, and the second connection line G42 at the remote layer is defined as the remote layer connection line G4031.

[0212] The lead wire G5 is arranged in the lead layer, and the lead layer is the first layer or the Nth layer along the axial direction of the annular body 300, which is convenient for connection and lead-out of the lead wire G5 and convenient for use.

[0213] See also Figures 10 to 23 In some embodiments, the second connection line G42 connecting the T-th layer main body 311 and the T-1-th layer main body 311 is an interlayer connection line G421, T is an even number and N ≥ T; the second connection line G42 connecting the H-th layer main body 311 and the H+1-th layer main body 311 is a cross-layer connection line G422, H is an even number and N ≥ H; the number of the main bodies 311 connected in series is A, the first main body 311 and the A-th main body 311 are respectively connected to the lead-out line G5; the second connection line G42 connecting the 2KP-th main body 311 and the 2KP+1-th main body 311 is 2: The second connecting line G42 connecting the 2KNP main body 311 and the 2KNP+1 main body 311 is the lead-out layer connecting line G4032, the second connecting line G42 connecting the (2K-1)NP main body 311 and the (2K-1)NP+1 main body 311 is the distal layer connecting line G4031, and the remaining second connecting lines G42 are cross-layer connecting lines G422, A is a positive integer, K is a positive integer, P is the number of magnetic pole pairs, N is the number of main body portions 311 stacked along the axial direction of the annular body 300, P is a positive integer, N is an even number, and 2KNP <A,(2K-1)NP+1<A。

[0214] Since the main body 311 is stacked with an even number of layers, and the main body 311 forming a phase winding is connected in series and arranged in a ring shape, then except for the lead-out layer connecting wire G4032 and the distal layer connecting wire G4031, most of the second connecting wires G42 connect the T-th layer main body 311 and the T-1-th layer main body 311, T is an even number, and this part of the second connecting wires G42 is defined as interlayer connecting wires G421, then the interlayer connecting wires G421 are the inner connecting wires G401 or the outer connecting wires G402, and the pitch of the interlayer connecting wires G421 is not equal to the whole pitch; there is also a part of the second connecting wires G42 that needs to connect the H-th layer main body 311 and the H+1-th layer main body 311, these second connecting wires G42 are defined as cross-layer connecting wires G422, then the cross-layer connecting wires G422 are also the inner connecting wires G401 or the outer connecting wires G402, and the pitch of the interlayer connecting wires G421 is not equal to the whole pitch. The first connecting line G41 connects the B-th layer main body 311 and the B-1-th layer main body 311, B is an even number, N≥B, and the first connecting line G41 is the outer connecting line G402 or the inner connecting line G401, and the pitch of the first connecting line G41 is not equal to the full pitch to reduce harmonics and suppress eddy current losses of the rotor 10.

[0215] The number of main bodies 311 connected in series is A, which means that the number of main bodies 311 forming one phase winding is A, and these main bodies 311 are arranged in series. Then the conductor part 310 is arranged in A / 2 pairs. These main bodies 311 are numbered 1, 2, 3...A in the order of series connection, and the first main body 311 and the Ath main body 311 are connected to the lead wire G5 respectively. The 2KNPth main body 311 is connected to the 2KNP+1th main body 311 through the lead-out layer connection wire G4032. The (2K-1)NPth main body 311 is connected to the (2K-1)NP+1th main body 311 through the far-end layer connection wire G4031. The rest of the second connection wires G42 between the 2KPth main body 311 and the 2KP+1th main body 311 are cross-layer connection wires G422. This structure can determine the positions of the lead-out layer connection line G4032, the distal layer connection line G4031 and the cross-layer connection line G422 and the numbers of the connected main body 311, so as to facilitate pre-processing and assembly connection.

[0216] Through the above structure, the positions of the lead-out layer connection line G4032, the distal layer connection line G4031, the cross-layer connection line G422 and the inter-layer connection line G421 and the numbering of the connected main body 311 can be easily determined to facilitate pre-processing and assembly connection.

[0217] See also Figures 6 to 9 In some embodiments, the conductor component 310 is made of flat wire in one piece.

[0218] The conductor component 310 is made of a flat wire, which can facilitate the processing and manufacturing of the conductor component 310 to maintain the uniformity of the resistivity along the length of the conductor component 310, reduce the impedance of the conductor component 310, and improve the conductive performance of the conductor component 310.

[0219] In some embodiments, the conductor component 310 includes an inner segment 312 and an outer segment 313 , and the conductor component 310 is made of a flat wire in one piece.

[0220] The conductor component 310 is made of flat wire, that is, the inner section 312, the main body 311 and the outer section 313 are formed in one piece using flat wire, which can facilitate the processing and manufacturing of the conductor component 310 to maintain the uniformity of the resistivity along the length of the conductor component 310, reduce the impedance of the conductor component 310, and improve the conductive performance of the conductor component 310.

[0221] In some embodiments, each pair of conductor components 310 is made of flat wire in one piece.

[0222] See also Figure 8For example, the two inner sections 312 of a pair of conductor components 310 are integrally formed, so that the pair of conductor components 310 are integrally formed using a flat wire, that is, one flat wire is used to preform two conductor components 310, and the inner sections 312 of the two conductor components 310 are integrally formed, so as to facilitate processing and manufacturing, and also facilitate the assembly of the conductor components 310 to form the winding structure 30. In addition, this structure makes the preformed structure of the first connecting wire G41 consistent, so that it can be arranged neatly and tightly at the inner circle of the annular winding structure 30, effectively reducing the radial inner end height of the winding structure 30, and improving manufacturability.

[0223] See also Fig. 9 For example, the two outer sections 313 of a pair of conductor components 310 are integrally formed, so that the pair of conductor components 310 are integrally formed using a flat wire, that is, one flat wire is used to preform two conductor components 310, and the outer sections 313 of the two conductor components 310 are integrally formed, so as to facilitate processing and manufacturing, and also facilitate the assembly of the conductor components 310 to form the winding structure 30. In addition, this structure makes the preformed structure of the first connecting wire G41 consistent, so that it can be neatly and tightly arranged at the outer circle of the annular winding structure 30, effectively reducing the radial outer end height of the winding structure 30, and improving manufacturability.

[0224] Each pair of conductor components 310 arranged in pairs is integrally formed using a flat wire, that is, two conductor components 310 are preformed using one flat wire, so as to facilitate processing and manufacturing, and also facilitate assembly of the conductor components 310 to form the winding structure 30 .

[0225] In some embodiments, when the two inner segments 312 are connected to form the first connection line G41, the two outer segments 313 are welded to form the second connection line G42, that is, the two outer segments 313 forming the second connection line G42 are welded to improve the connection strength, so that the two outer segments 313 have good electrical conductivity, reduce the impedance between the two outer segments 313, and facilitate connection. It can be understood that the two outer segments 313 in the middle of the two pairs of conductor components 310 that need to be connected in series can also be fixedly connected in other ways, such as connected by wiring terminals, tied and fixed, etc. In addition, the structure can prefabricate the shape of each outer segment 313, and the main body 311 is stacked in the axial direction. Accordingly, the outer segments 313 can form a stacked winding form at the periphery of the winding structure 30, that is, two outer segments 313 that need to be welded together can be stacked along the axial direction, so that there will be no mutual nesting of long-distance and short-distance connecting lines G4, so that the spacing between each pair of outer segments 313 that need to be welded together tends to be consistent, so as to improve the welding quality and manufacturability; alternatively, the two connected outer segments 313 can also be butt-connected in the circumferential direction.

[0226] In some embodiments, when the two outer segments 313 are connected to form the first connection line G41, the two inner segments 312 are welded to form the second connection line G42, that is, the two inner segments 312 forming the second connection line G42 are welded to improve the connection strength, so that the two inner segments 312 have good electrical conductivity, reduce the impedance between the two inner segments 312, and facilitate connection. It can be understood that the two inner segments 312 in the middle of the two pairs of conductor components 310 that need to be connected in series can also be fixedly connected in other ways, such as connected by wiring terminals, tied and fixed, etc. In addition, the structure can prefabricate the shape of each inner segment 312, and the main body 311 is stacked in the axial direction. Accordingly, the inner segments 312 can form a stacked winding form at the inner periphery of the winding structure 30, that is, the two inner segments 312 that need to be welded together can be stacked along the axial direction, so that there will be no mutual nesting of long-distance and short-distance connecting lines G4, so that the spacing between each pair of inner segments 312 that need to be welded together tends to be consistent, so as to improve the welding quality and manufacturability; alternatively, the two connected inner segments 312 can also be butt-connected in the circumferential direction.

[0227] See also Figures 6 to 9 In some embodiments, the cross-sectional shape of the conductor component 310 is circular, elliptical or polygonal.

[0228] The cross section of the conductor component 310 refers to the cross section perpendicular to the length direction of the conductor component 310. If the cross section of the conductor component 310 is circular, the conductor component 310 uses a circular conductor. If the cross section of the conductor component 310 is elliptical, the conductor component 310 uses an elliptical conductor. If the cross section of the conductor component 310 is polygonal, the conductor component 310 uses a polygonal conductor. The polygon may be a triangle, a quadrilateral, or a polygon with more than four sides. The quadrilateral may be a parallelogram, a trapezoid, or an irregular quadrilateral. The parallelogram may be a rectangle, a square, a rhombus, or other parallelograms. The polygon with more than four sides may be a pentagon, a hexagon, etc.

[0229] The cross-sectional shape of the conductor component 310 is circular, elliptical or polygonal, which facilitates the shape selection of the conductor component 310 and the manufacture of the winding structure 30 .

[0230] See also Figures 6 to 9 In some embodiments, the cross-sectional shape of the main body 311 is circular, elliptical or polygonal.

[0231] The cross section of the main body 311 refers to the cross section perpendicular to the length direction of the main body 311. If the cross section of the main body 311 is circular, the main body 311 adopts a circular conductor. If the cross section of the main body 311 is elliptical, the main body 311 adopts an elliptical conductor. If the cross section of the main body 311 is polygonal, the main body 311 adopts a polygonal conductor. The polygon can be a triangle, a quadrilateral or a polygon with more than four sides, and the quadrilateral can be a parallelogram, a trapezoid or an irregular quadrilateral. The parallelogram can be a rectangle, a square, a rhombus or other parallelograms. The polygon with more than four sides can be a pentagon, a hexagon, etc. Among them, the cross section of the main body 311 is a rectangle, and the main body 311 is a flat wire conductor. The manufactured winding structure 30 is applied to the stator 20, which can improve the slot fill rate of the stator 20.

[0232] The cross-sectional shape of the main body 311 is circular, elliptical or polygonal, which facilitates the shape selection of the main body 311 and the manufacture of the winding structure 30 .

[0233] See also Figures 6 to 9 In some embodiments, the cross-sections at other locations of the conductor component 310 are set to be the same as the cross-section shape and size of the main body 311, so that the conductor component 310 is wound into the winding structure 30. Of course, the cross-sections at other locations of the conductor component 310 can also be set to be different from the cross-section shape and size of the main body 311, so as to facilitate the processing and manufacturing of the conductor component 310.

[0234] In some embodiments, the winding structure 30 forms P pairs of magnetic poles, where P is a positive integer.

[0235] The magnetic pair number formed by the winding structure 30 is set to a positive integer, and the number of magnetic pairs can be set as needed to facilitate the design and application scope of the winding structure 30.

[0236] In some embodiments, the annular body 300 is stacked with N layers of main body parts 311 along the axial direction, and the number of main body parts 311 located in the same axial layer of the annular body 300 and in the same magnetic pole is q, N is an even number, and q is a positive integer.

[0237] The number of the main body portions 311 located in the same axial layer of the annular body 300 and in the same magnetic pole is also referred to as the number of slots per pole per phase.

[0238] When the above structure is applied to the stator 20, the number of slots per pole per phase of the stator 20 can be q, so as to facilitate the design and manufacture of the winding structure 30; q is a positive integer, and the number of slots per pole per phase is set as needed to improve the application scope of the winding structure 30 design.

[0239] In some embodiments, when q≥2, the q main bodies 311 located in the same axial layer of the annular body 300 and in the same magnetic pole are arranged adjacent to each other.

[0240] The q main bodies 311 located at the same axial layer of the annular body 300 and at the same magnetic pole mean that the q main bodies 311 are located at the same axial layer of the annular body 300 and at the same magnetic pole.

[0241] By arranging the q main bodies 311 in the same layer and in the same magnetic pole adjacent to each other, the generated magnetic field can be more concentrated, thereby increasing the intensity of the generated magnetic field.

[0242] In some embodiments, the winding structure 30 includes a single-phase winding, and the winding is made of a plurality of conductor components 310 connected in series.

[0243] The winding structure 30 includes a single-phase winding, has a simple structure, and can be applied to a single-phase stator 20 .

[0244] In some embodiments, the winding structure 30 includes a multi-phase winding, which is made of a plurality of conductor components 310 connected in series. The structure of each phase winding is the same, and the multi-phase winding is evenly distributed along the circumference of the winding structure 30 .

[0245] When the winding structure 30 includes multi-phase windings, the multi-phase winding structure 30 is configured to be identical to simplify the structure of each phase winding, facilitate processing and manufacturing, and facilitate application to the multi-phase stator 20 .

[0246] See also Figures 14 to 19 In some embodiments, each phase winding includes at least two parallel branches.

[0247] Each phase winding uses at least two parallel branches, and the current of the corresponding phase winding can be shared through each branch, so that the winding structure 30 can withstand a larger working current, thereby improving the power torque of the motor using the winding structure 30. It can also reduce the number of series coil turns in each phase winding, thereby facilitating the adjustment of the motor power torque.

[0248] See also Figures 10 to 13 ,as well as Figure 20 to Figure 23 In some embodiments, each phase winding includes only one branch, that is, a parallel branch, to simplify the structure.

[0249] See also Figure 6 , Figures 10 to 23, the number of slots of the stator slots 211 of the stator 20 applying the winding structure 30 is Z, the number of pole pairs is P, the number of slots per pole is C, the main body 311 of the annular body 300 stacked axially is N layers, the number of slots per pole per phase is q, the number of phases of the winding structure 30 is X, the parallel branches of each phase winding is D, and the number of the main body 311 in series of each winding in each phase is A. Then the number of stator slots 211 occupied by each winding in each pole in each layer (hereinafter referred to as the number of slots per pole per phase of each parallel branch) is F, and F = q / D; C = Z / 2P, A = NZ / XD, that is, the number of slots per pole per phase q is equal to the product of the number of slots per pole per phase F of each parallel branch and the number of parallel branches D; the number of slots per pole C is equal to the full pitch; the product of the number of slots Z of the stator slots 211 and the number of layers N of the main body 311 is divided by the number of phases X of the winding structure 30, and then divided by the number of parallel branches D, the number A of the main body 311 in series of the winding can be obtained. A is a positive integer, P is a positive integer, C is a positive integer, D is a positive integer, F is a positive integer, X is a positive integer, Z is a positive integer, and N is an even number.

[0250] Please refer to again Figures 10 to 12 , and please refer to together Figure 6 and Figure 8 , where the label S1 row represents the magnetic poles, and there are 8 magnetic poles, and each magnetic pole includes 6 stator slots 211, then the number of slots per pole C = 6, and the number of pole pairs P = 4. The label S2 row represents the numbers of the stator slots 211, and there are 48 stator slots 211, numbered from J1, J2 to J48. The label S3 column represents the phases of the windings, Fig.10 is the U-phase winding, Fig.11 is the V-phase winding, Fig.12 is the W-phase winding, and the phases of the three-phase windings of UVW differ by 120 degrees. The label S4 column represents the numbers of the layers N of the main body 311, and there are 4 layers of the main body 311, that is, N = 4, numbered from T1 to T4, and the T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence numbers of the main body 311 connected in series in each phase winding, and it indicates the positions of the main body 311 of each layer in each stator slot 211; among them, the total number A of the main body 311 is 64, from 1 to 64. The first main body 311 and the 64th main body 311 are connected to the lead-out wire G5. The conductor components 310 are A / 2 pairs, that is, 32 pairs are arranged. Then the E-th main body 311 and the (E - 1)-th main body 311 are connected by the first connection wire G41, E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located in the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located in the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the interlayer connection wire G421, B < A, T is an even number, T ≤ N.

[0251] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection line G42 connecting the 2KP-th main body part 311 and the (2KP + 1)-th main body part 311: The 2KNP-th main body part 311 and the 2KNP + 1-th main body part 311 are connected by an extraction layer connection line G4032, for example, the 32nd main body part 311 and the 33rd main body part 311 are connected by an extraction layer connection line G4032. The (2K - 1)NP-th main body part 311 and the (2K - 1)NP + 1-th main body part 311 are connected by a distal layer connection line G4031, for example, the 16th main body part 311 and the 17th main body part 311 are connected by a distal layer connection line G4031, and the 48th main body part 311 and the 49th main body part 311 are connected by a distal layer connection line G4031.

[0252] When the 2KP-th main body part 311 and the (2KP + 1)-th main body part 311 are respectively located on the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body part 311 and the (2KP + 1)-th main body part 311 are connected by a cross-layer connection line G422, for example, the 8th main body part 311 and the 9th main body part 311 are connected by a cross-layer connection line G422, the 24th main body part 311 and the 25th main body part 311 are connected by a cross-layer connection line G422, the 40th main body part 311 and the 41st main body part 311 are connected by a cross-layer connection line G422, and the 56th main body part 311 and the 57th main body part 311 are connected by a cross-layer connection line G422. It can be seen that Fig.10 the number of slots per pole C = 6, the number of pole pairs P = 4, the number of slots per pole per phase q = 2, the number of parallel branches D = 1, the number of single-pole single-phase slots F per parallel branch = 2, and the number of phases X of the winding structure 30 = 3.

[0253] The U-phase winding, the V-phase winding, and the W-phase winding have the same connection structure, only the stator slots 211 are offset during winding. For example, the numbering of the stator slots 211 of the V-phase winding is offset 4 numbers backward relative to the U-phase winding, and the numbering of the stator slots 211 of the W-phase winding is offset 4 numbers forward relative to the U-phase winding.

[0254] Figures 10 to 12In the embodiment, the first connecting wire G41 is the inner connecting wire G401, and the pitch of the first connecting wire G41 is Y=Z / 2P+1=7, that is, the pitch of the inner connecting wire G401 is long. The second connecting wire G42 includes the same-layer connecting wire G403, the cross-layer connecting wire G422 and the inter-layer connecting wire G421. Among the same-layer connecting wires G403: the pitch of the lead-out layer connecting wire G4032 is short, and the pitch of the distal layer connecting wire G4031 is full. The cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitches Y=Z / 2P-1=5, that is, the pitch of the outer connecting wire G402 is short. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and a coordinated number of cross-layers, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner side height of the winding structure 30 is relatively small. The radial outer side of the winding structure 30 is preferably formed in a stacked winding form, which is convenient for improving the consistency of the spacing between the weld points, improving the welding quality and manufacturability. The outer connecting wire G402 of the winding structure 30 adopts a short-distance connection, which is conducive to reducing the end height of the radial outer side of the winding structure 30, reducing copper loss and the outer envelope size of the motor using the winding structure 30, and improving the power torque density.

[0255] Please refer again Fig.13 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 8 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=4. The row labeled S2 represents the number of stator slots 211, of which there are 48 stator slots 211, numbered from J1, J2 to J48. The column labeled S3 represents the phase of the winding, Fig.13is the U-phase winding. The label S4 column represents the serial number of the number of layers N of the main body 311. Among them, the main body 311 has 4 layers, that is, N = 4, and the serial numbers range from T1 to T4. The T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, and it indicates the position of each layer of the main body 311 in each stator slot 211. Among them, the total number A of the main bodies 311 is 64, from 1 to 64. The first main body 311 and the 64th main body 311 are connected to the lead wire G5. The conductor components 310 are A / 2 pairs, that is, 32 pairs are provided. Then, the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, where E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located on the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, and E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located on the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the inter-layer connection wire G421, B < A, T is an even number, and T ≤ N.

[0256] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: The 2KNP-th main body 311 and the (2KNP + 1)-th main body 311 are connected by the lead-out layer connection wire G4032. For example, the 32nd main body 311 and the 33rd main body 311 are connected by the lead-out layer connection wire G4032. The (2K - 1)NP-th main body 311 and the ((2K - 1)NP + 1)-th main body 311 are connected by the distal layer connection wire G4031. For example, the 16th main body 311 and the 17th main body 311 are connected by the distal layer connection wire G4031, and the 48th main body 311 and the 49th main body 311 are connected by the distal layer connection wire G4031.

[0257] When the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are respectively located on the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are connected by the cross-layer connection wire G422. For example, the 8th main body 311 and the 9th main body 311 are connected by the cross-layer connection wire G422, the 24th main body 311 and the 25th main body 311 are connected by the cross-layer connection wire G422, the 40th main body 311 and the 41st main body 311 are connected by the cross-layer connection wire G422, and the 56th main body 311 and the 57th main body 311 are connected by the cross-layer connection wire G422. From Fig.13It can be seen that the number of slots per pole per phase is q=2, the number of parallel branches is D=1, the number of single-pole single-phase slots in each parallel branch is F=2, and the number of phases of the winding structure 30 is X=3.

[0258] The U-phase winding, the V-phase winding and the W-phase winding are identical in connection structure, except that the stator slots 211 are offset during winding.

[0259] Fig.13 In the embodiment, the first connecting wire G41 is the inner connecting wire G401, and the pitch of the first connecting wire G41 is Y=Z / 2P-1=5, that is, the pitch of the inner connecting wire G401 is short pitch. The second connecting wire G42 includes the same-layer connecting wire G403, the cross-layer connecting wire G422 and the inter-layer connecting wire G421. Among the same-layer connecting wires G403: the pitch of the lead-out layer connecting wire G4032 is short pitch, and the pitch of the distal layer connecting wire G4031 is full pitch. The cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both the outer connecting wire G402, and their pitch Y=Z / 2P+1=7, that is, the pitch of the outer connecting wire G402 is long pitch. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and coordinated cross-layer number, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner side height of the winding structure 30 is small; and the pitch of the inner connecting wire G401 of the winding structure 30 is set to a short pitch, which can further reduce the radial inner side height of the winding structure 30, reduce copper loss, and increase the inner circle envelope size of the stator 20 using the winding structure 30, and expand the internal space of the stator 20. The radial outer side of the winding structure 30 is preferably formed in a lapped winding form, which is convenient for improving the consistency of the spacing between the welding points, improving the welding quality and manufacturability.

[0260] Please refer again Fig.14 and Fig.15 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 8 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=4. The row labeled S2 represents the number of stator slots 211, of which there are 48 stator slots 211, numbered from J1, J2 to J48. The column labeled S3 represents the phase of the winding, Fig.14 It is a parallel branch of the U-phase winding (represented by U1). Fig.15It is another parallel branch of the U-phase winding (denoted as U2). The label S4 column represents the numbering of the number of layers N of the main body 311. Among them, the main body 311 has 4 layers, that is, N = 4, and the numbering ranges from T1 to T4. The T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, which indicates the position of each layer of the main body 311 in each stator slot 211; among them, the total number A of the main bodies 311 is 32, ranging from 1 to 32. The first main body 311 and the 32nd main body 311 are connected to the lead-out wire G5. The conductor components 310 are A / 2 pairs, that is, 16 pairs are arranged. Then the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, where E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located on the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, and E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located on the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the inter-layer connection wire G421, B < A, T is an even number, and T ≤ N.

[0261] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: Since 2KNP = 32K, its minimum is 32, then there is no lead-out layer connection wire G4032 in this winding. The (2K - 1)NP-th main body 311 and the (2K - 1)NP + 1-th main body 311 are connected by the distal layer connection wire G4031. For example, the 16th main body 311 and the 17th main body 311 are connected by the distal layer connection wire G4031.

[0262] When the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are respectively located on the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are connected by the cross-layer connection wire G422. For example, the 8th main body 311 and the 9th main body 311 are connected by the cross-layer connection wire G422, and the 24th main body 311 and the 25th main body 311 are connected by the cross-layer connection wire G422. From Fig.14 and Fig.15 it can be known that the number of slots per pole per phase q = 2, the number of parallel branches D = 2, the number of slots per pole per phase of each parallel branch F = 1, and the number of phases X of the winding structure 30 = 3.

[0263] The U-phase winding, the V-phase winding, and the W-phase winding have the same connection structure, only the stator slots 211 are offset during winding.

[0264] Fig.14 and Fig.15In the embodiment, the first connection line G41 is the inner connection line G401, and the pitch of the first connection line G41 is Y=Z / 2P+1=7, that is, the pitch of the inner connection line G401 is long. The second connection line G42 includes the same-layer connection line G403, the cross-layer connection line G422 and the inter-layer connection line G421. In the same-layer connection line G403: Fig.14 The pitch of the mid-to-distal layer connection line G4031 is long. Fig.15 The mid-to-distal layer connection line G4031 is short-distance, that is, the pitch of the distal layer connection line G4031 can be long-distance, short-distance or full-distance, which can be set according to needs. Fig.14 and Fig.15 In the embodiment: the cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitch Y=Z / 2P-1=5, that is, the pitch of the outer connecting wire G402 is short-distance. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and a coordinated number of cross-layers, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner height of the winding structure 30 is relatively small. The radial outer side of the winding structure 30 is preferably formed in a stacked winding form, which is convenient for improving the consistency of the spacing between the welds, improving the welding quality and manufacturability. The outer connecting wire G402 of the winding structure 30 adopts a short-distance connection, which is beneficial to reduce the end height of the radial outer side of the winding structure 30, reduce copper loss and the outer envelope size of the motor using the winding structure 30, and improve the power torque density. Each phase winding uses two parallel branches, and each branch can share the current of the corresponding phase winding, so that the winding structure 30 can withstand a larger working current, thereby improving the power torque of the motor using the winding structure 30. It can also reduce the number of series coil turns in each phase winding, thereby facilitating the adjustment of the motor power torque.

[0265] Please refer again Fig.16 and Fig.17 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 8 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=4. The row labeled S2 represents the number of stator slots 211, of which there are 48 stator slots 211, numbered from J1, J2 to J48. The column labeled S3 represents the phase of the winding, Fig.16 It is a parallel branch of the U-phase winding (represented by U1). Fig.17 It is another parallel branch of the U-phase winding (indicated by U2). The column labeled S4 indicates the number of layers N of the main body 311, wherein the main body 311 has 4 layers, ie, N=4, numbered from T1 to T4. Fig.16 The middle T1 layer is the lead-in layer, and the T4 layer is the distal layer. Fig.17The T1 layer is the distal layer, and the T4 layer is the lead-out layer. The label S5 indicates the connection sequence number of each main body part 311 connected in series in each phase winding, which indicates the position of each main body part 311 in each stator slot 211. Among them, the total number A of the main body parts 311 is 32, ranging from 1 to 32. The first main body part 311 and the 32nd main body part 311 are connected to the lead-out wire G5. The conductor components 310 are A / 2 pairs, that is, 16 pairs are arranged. Then, the E-th main body part 311 is connected to the (E - 1)-th main body part 311 through the first connection wire G41, where E is an even number, and the E-th main body part 311 and the (E - 1)-th main body part 311 are respectively located in the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, and E ≤ A. When the B-th main body part 311 and the (B + 1)-th main body part 311 are respectively located in the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body part 311 and the (B + 1)-th main body part 311 are connected by the inter-layer connection wire G421, B < A, T is an even number, and T ≤ N.

[0266] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body part 311 and the (2KP + 1)-th main body part 311: Since 2KNP = 32K, its minimum value is 32, then there is no lead-out layer connection wire G4032 in this winding. The (2K - 1)NP-th main body part 311 and the (2K - 1)NP + 1-th main body part 311 are connected by the distal layer connection wire G4031. For example, the 16th main body part 311 and the 17th main body part 311 are connected by the distal layer connection wire G4031.

[0267] When the 2KP-th main body part 311 and the (2KP + 1)-th main body part 311 are respectively located in the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body part 311 and the (2KP + 1)-th main body part 311 are connected by the cross-layer connection wire G422. For example, the 8th main body part 311 and the 9th main body part 311 are connected by the cross-layer connection wire G422, and the 24th main body part 311 and the 25th main body part 311 are connected by the cross-layer connection wire G422. From Fig.16 and Fig.17 it can be known that the number of slots per pole per phase q = 2, the number of parallel branches D = 2, the number of slots per pole per phase for each parallel branch F = 1, and the number of phases X of the winding structure 30 = 3.

[0268] The U-phase winding, V-phase winding, and W-phase winding have the same connection structure, only the stator slots 211 are offset during winding.

[0269] Fig.16 and Fig.17In the embodiment, the first connection line G41 is the inner connection line G401, and the pitch of the first connection line G41 is Y=Z / 2P+1=7, that is, the pitch of the inner connection line G401 is long. The second connection line G42 includes the same-layer connection line G403, the cross-layer connection line G422 and the inter-layer connection line G421. In the same-layer connection line G403: Fig.16 The pitch of the mid-to-distal layer connection line G4031 is long. Fig.17 The mid-to-far layer connection line G4031 is short distance. Fig.16 and Fig.17 In the embodiment: the cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitch Y=Z / 2P-1=5, that is, the pitch of the outer connecting wire G402 is short-distance. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and a coordinated number of cross-layers, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner height of the winding structure 30 is relatively small. The radial outer side of the winding structure 30 is preferably formed in a stacked winding form, which is convenient for improving the consistency of the spacing between the welds, improving the welding quality and manufacturability. The outer connecting wire G402 of the winding structure 30 adopts a short-distance connection, which is beneficial to reduce the end height of the radial outer side of the winding structure 30, reduce copper loss and the outer envelope size of the motor using the winding structure 30, and improve the power torque density. Each phase winding uses two parallel branches, and each branch can share the current of the corresponding phase winding, so that the winding structure 30 can withstand a larger working current, thereby improving the power torque of the motor using the winding structure 30. It can also reduce the number of series coil turns in each phase winding, thereby facilitating the adjustment of the motor power torque.

[0270] Depend on Figures 14 to 17 It can be seen from the embodiments that in each phase winding, the lead-out layers of different parallel branches can be located at the same axial layer of the winding structure 30, or at different axial layers of the winding structure 30, which is convenient for setting the position of the lead-out layer. Figures 12 to 17 It can be seen from the embodiment that the pitch of the distal layer connection line G4031 can be long, short or full, which is more convenient to set.

[0271] Please refer again Fig.18 and Fig.19 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 8 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=4. The row labeled S2 represents the number of stator slots 211, of which there are 48 stator slots 211, numbered from J1, J2 to J48. The column labeled S3 represents the phase of the winding, Fig.18 It is a parallel branch of the U-phase winding (represented by U1). Fig.19It is another parallel branch of the U-phase winding (denoted as U2). The label S4 column represents the serial number of the number of layers N of the main body 311. Among them, the main body 311 has 6 layers, that is, N = 6, and the serial numbers range from T1 to T6. The T1 layer is the lead-out layer, and the T6 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, and it indicates the position of each layer of the main body 311 in each stator slot 211. Among them, the total number A of the main bodies 311 is 48, ranging from 1 to 48. The first main body 311 and the 48th main body 311 are connected to the lead wire G5. The conductor components 310 are A / 2 pairs, that is, 24 pairs are arranged. Then the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, where E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located on the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, and E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located on the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected through the interlayer connection wire G421, B < A, T is an even number, and T ≤ N.

[0272] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: Since 2KNP = 48K, its minimum value is 48, then there is no lead-out layer connection wire G4032 in this winding. The (2K - 1)NP-th main body 311 and the (2K - 1)NP + 1-th main body 311 are connected through the distal layer connection wire G4031. For example, the 24th main body 311 and the 25th main body 311 are connected through the distal layer connection wire G4031.

[0273] When the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are respectively located on the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are connected through the cross-layer connection wire G422. For example, the 8th main body 311 and the 9th main body 311 are connected through the cross-layer connection wire G422, the 16th main body 311 and the 17th main body 311 are connected through the cross-layer connection wire G422, the 24th main body 311 and the 25th main body 311 are connected through the cross-layer connection wire G422, the 32nd main body 311 and the 33rd main body 311 are connected through the cross-layer connection wire G422, and the 40th main body 311 and the 41st main body 311 are connected through the cross-layer connection wire G422. From Fig.18 and Fig.19 it can be known that the number of slots per pole per phase q = 2, the number of parallel branches D = 2, the number of slots per pole per phase of each parallel branch F = 1, and the number of phases X of the winding structure 30 = 3.

[0274] The U-phase winding, the V-phase winding and the W-phase winding are identical in connection structure, except that the stator slots 211 are offset during winding.

[0275] Fig.18 and Fig.19 In the embodiment, the first connection line G41 is the inner connection line G401, and the pitch of the first connection line G41 is Y=Z / 2P+1=7, that is, the pitch of the inner connection line G401 is long. The second connection line G42 includes the same-layer connection line G403, the cross-layer connection line G422 and the inter-layer connection line G421. In the same-layer connection line G403: Fig.18 The pitch of the mid-to-distal layer connection line G4031 is long. Fig.19 The mid-to-far layer connection line G4031 is short distance. Fig.18 and Fig.19 In the embodiment: the cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitch Y=Z / 2P-1=5, that is, the pitch of the outer connecting wire G402 is short-distance. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and a coordinated number of cross-layers, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner height of the winding structure 30 is relatively small. The radial outer side of the winding structure 30 is preferably formed in a stacked winding form, which is convenient for improving the consistency of the spacing between the welds, improving the welding quality and manufacturability. The outer connecting wire G402 of the winding structure 30 adopts a short-distance connection, which is beneficial to reduce the end height of the radial outer side of the winding structure 30, reduce copper loss and the outer envelope size of the motor using the winding structure 30, and improve the power torque density. Each phase winding uses two parallel branches, and each branch can share the current of the corresponding phase winding, so that the winding structure 30 can withstand a larger working current, thereby improving the power torque of the motor using the winding structure 30. It can also reduce the number of series coil turns in each phase winding, thereby facilitating the adjustment of the motor power torque.

[0276] Please refer again Fig. 20 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 8 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=4. The row labeled S2 represents the number of stator slots 211, of which there are 48 stator slots 211, numbered from J1, J2 to J48. The column labeled S3 represents the phase of the winding, Fig. 20is the U-phase winding. The label S4 column represents the numbering of the number of layers N of the main body 311. Among them, the main body 311 has 4 layers, that is, N = 4, and the numbering ranges from T1 to T4. The T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, and it indicates the position of each layer of the main body 311 in each stator slot 211. Among them, the total number A of the main bodies 311 is 64, from 1 to 64. The first main body 311 and the 64th main body 311 are connected to the lead wire G5. The conductor components 310 are A / 2 pairs, that is, 32 pairs are arranged. Then the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located on the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located on the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the interlayer connection wire G421, B < A, T is an even number, T ≤ N.

[0277] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: The 2KNP-th main body 311 and the (2KNP + 1)-th main body 311 are connected by the lead-out layer connection wire G4032. For example, the 32nd main body 311 and the 33rd main body 311 are connected by the lead-out layer connection wire G4032. The (2K - 1)NP-th main body 311 and the ((2K - 1)NP + 1)-th main body 311 are connected by the distal layer connection wire G4031. For example, the 16th main body 311 and the 17th main body 311 are connected by the distal layer connection wire G4031, and the 48th main body 311 and the 49th main body 311 are connected by the distal layer connection wire G4031.

[0278] When the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are respectively located on the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are connected by the cross-layer connection wire G422. For example, the 8th main body 311 and the 9th main body 311 are connected by the cross-layer connection wire G422, the 24th main body 311 and the 25th main body 311 are connected by the cross-layer connection wire G422, the 40th main body 311 and the 41st main body 311 are connected by the cross-layer connection wire G422, and the 56th main body 311 and the 57th main body 311 are connected by the cross-layer connection wire G422. From Fig. 20It can be seen that the number of slots per pole per phase is q=2, the number of parallel branches is D=1, the number of single-pole single-phase slots in each parallel branch is F=2, and the number of phases of the winding structure 30 is X=3.

[0279] The U-phase winding, the V-phase winding and the W-phase winding are identical in connection structure, except that the stator slots 211 are offset during winding.

[0280] Fig. 20 In the embodiment, the first connecting wire G41 is the inner connecting wire G401, and the pitch of the first connecting wire G41 is Y=Z / 2P+2=8, that is, the pitch of the inner connecting wire G401 is long. The second connecting wire G42 includes the same-layer connecting wire G403, the cross-layer connecting wire G422 and the inter-layer connecting wire G421. Among the same-layer connecting wires G403: the pitch of the lead-out layer connecting wire G4032 is short, and the pitch of the distal layer connecting wire G4031 is full. The cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitches Y=Z / 2P-2=4, that is, the pitch of the outer connecting wire G402 is long. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and coordinated cross-layer number, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner side height of the winding structure 30 is small; and the pitch of the inner connecting wire G401 of the winding structure 30 is set to a short pitch, which can further reduce the radial inner side height of the winding structure 30, reduce copper loss, and increase the inner circle envelope size of the stator 20 using the winding structure 30, and expand the internal space of the stator 20. The radial outer side of the winding structure 30 is preferably formed in a lapped winding form, which is convenient for improving the consistency of the spacing between the welding points, improving the welding quality and manufacturability.

[0281] Please refer again Fig.21 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 6 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=3. The row labeled S2 represents the number of stator slots 211, of which there are 36 stator slots 211, numbered from J1, J2 to J36. The column labeled S3 represents the phase of the winding, Fig.21It is the U-phase winding. The label S4 column represents the number of the layer N of the main body 311. There are 4 layers in the main body 311, that is, N = 4, and the numbers range from T1 to T4. The T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, and it indicates the position of each layer of the main body 311 in each stator slot 211. Among them, the total number A of the main bodies 311 is 48, ranging from 1 to 48. The first main body 311 and the 48th main body 311 are connected to the lead wire G5. The conductor components 310 are A / 2 pairs, that is, 24 pairs are arranged. Then, the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, where E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located on the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, and E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located on the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the interlayer connection wire G421, B < A, T is an even number, and T ≤ N.

[0282] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: the 2KNP-th main body 311 and the (2KNP + 1)-th main body 311 are connected by the lead-out layer connection wire G4032. For example, the 24th main body 311 and the 25th main body 311 are connected by the lead-out layer connection wire G4032. The (2K - 1)NP-th main body 311 and the ((2K - 1)NP + 1)-th main body 311 are connected by the distal layer connection wire G4031. For example, the 12th main body 311 and the 13th main body 311 are connected by the distal layer connection wire G4031, and the 36th main body 311 and the 37th main body 311 are connected by the distal layer connection wire G4031.

[0283] When the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are respectively located on the H-th layer and the (H + 1)-th layer, H is an even number and N ≥ H, the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are connected by the cross-layer connection wire G422. For example, the 6th main body 311 and the 7th main body 311 are connected by the cross-layer connection wire G422, the 18th main body 311 and the 19th main body 311 are connected by the cross-layer connection wire G422, the 31st main body 311 and the 32nd main body 311 are connected by the cross-layer connection wire G422, and the 42nd main body 311 and the 43rd main body 311 are connected by the cross-layer connection wire G422. From Fig. 20It can be seen that the number of slots per pole per phase is q=2, the number of parallel branches is D=1, the number of single-pole single-phase slots in each parallel branch is F=2, and the number of phases of the winding structure 30 is X=3.

[0284] The U-phase winding, the V-phase winding and the W-phase winding are identical in connection structure, except that the stator slots 211 are offset during winding.

[0285] Fig.21 In the embodiment, the first connecting wire G41 is the inner connecting wire G401, and the pitch of the first connecting wire G41 is Y=Z / 2P+1=7, that is, the pitch of the inner connecting wire G401 is long. The second connecting wire G42 includes the same-layer connecting wire G403, the cross-layer connecting wire G422 and the inter-layer connecting wire G421. Among the same-layer connecting wires G403: the pitch of the lead-out layer connecting wire G4032 is short, and the pitch of the distal layer connecting wire G4031 is full. The cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitches Y=Z / 2P-1=5, that is, the pitch of the outer connecting wire G402 is long. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and coordinated cross-layer number, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner side height of the winding structure 30 is small; and the pitch of the inner connecting wire G401 of the winding structure 30 is set to a short pitch, which can further reduce the radial inner side height of the winding structure 30, reduce copper loss, and increase the inner circle envelope size of the stator 20 using the winding structure 30, and expand the internal space of the stator 20. The radial outer side of the winding structure 30 is preferably formed in a lapped winding form, which is convenient for improving the consistency of the spacing between the welding points, improving the welding quality and manufacturability.

[0286] Please refer again Fig. 22 , and please also refer to Figure 6 and Fig. 9 , where the row labeled S1 represents the magnetic poles, of which there are 6 magnetic poles, each magnetic pole includes 6 stator slots 211, then the number of slots occupied by each pole is C=6, and the number of magnetic pole pairs is P=3. The row labeled S2 represents the number of stator slots 211, of which there are 36 stator slots 211, numbered from J1, J2 to J36. The column labeled S3 represents the phase of the winding, Fig. 22is the U-phase winding. The label S4 column represents the number of the layer N of the main body 311. Among them, the main body 311 has 4 layers, that is, N = 4, and the numbers range from T1 to T4. The T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, which indicates the position of each layer of the main body 311 in each stator slot 211. Among them, the total number A of the main bodies 311 is 48, from 1 to 48. The first main body 311 and the 48th main body 311 are connected to the lead-out wire G5. The conductor components 310 are A / 2 pairs, that is, 24 pairs are arranged. Then the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are located on the M-th layer and the (M - 1)-th layer respectively, M is an even number, M ≤ N, E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are located on the T-th layer and the (T - 1)-th layer respectively, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the interlayer connection wire G421, B < A, T is an even number, T ≤ N.

[0287] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: the 2KNP-th main body 311 and the (2KNP + 1)-th main body 311 are connected by the lead-out layer connection wire G4032. For example, the 24th main body 311 and the 25th main body 311 are connected by the lead-out layer connection wire G4032. The (2K - 1)NP-th main body 311 and the ((2K - 1)NP + 1)-th main body 311 are connected by the distal layer connection wire G4031. For example, the 12th main body 311 and the 13th main body 311 are connected by the distal layer connection wire G4031, and the 36th main body 311 and the 37th main body 311 are connected by the distal layer connection wire G4031.

[0288] When the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are located on the H-th layer and the (H + 1)-th layer respectively, H is an even number and N ≥ H, the 2KP-th main body 311 and the (2KP + 1)-th main body 311 are connected by the cross-layer connection wire G422. For example, the 6th main body 311 and the 7th main body 311 are connected by the cross-layer connection wire G422, the 18th main body 311 and the 19th main body 311 are connected by the cross-layer connection wire G422, the 31st main body 311 and the 32nd main body 311 are connected by the cross-layer connection wire G422, and the 42nd main body 311 and the 43rd main body 311 are connected by the cross-layer connection wire G422. From Fig. 20It can be seen that the number of slots per pole per phase is q=2, the number of parallel branches is D=1, the number of single-pole single-phase slots in each parallel branch is F=2, and the number of phases of the winding structure 30 is X=3.

[0289] The U-phase winding, the V-phase winding and the W-phase winding are identical in connection structure, except that the stator slots 211 are offset during winding.

[0290] Fig. 22 In the embodiment, the first connecting wire G41 is the outer connecting wire G402, and the pitch of the first connecting wire G41 is Y=Z / 2P+1=7, that is, the pitch of the outer connecting wire G402 is long. The second connecting wire G42 includes the same-layer connecting wire G403, the cross-layer connecting wire G422 and the inter-layer connecting wire G421. Among the same-layer connecting wires G403: the pitch of the lead-out layer connecting wire G4032 is short, and the pitch of the distal layer connecting wire G4031 is full. The cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both the inner connecting wire G401, and their pitch Y=Z / 2P-1=5, that is, the pitch of the inner connecting wire G401 is long. This structure can make the first connecting wire G41 preformed on the radial outer side of the winding structure 30 have the same pitch and a coordinated number of cross-layers, so that the radial outer side of the winding structure 30 can be arranged neatly and tightly, and the radial outer side height of the winding structure 30 is relatively small. The pitch of the inner connecting wire G401 of the winding structure 30 is set to a short pitch, which can reduce the height of the radial inner side of the winding structure 30, reduce copper loss, and increase the inner circle envelope size of the stator 20 to which the winding structure 30 is applied, and expand the internal space of the stator 20. The radial inner side of the winding structure 30 is preferably formed in a stacked winding form, which is convenient for improving the consistency of the spacing between the welding points, improving the welding quality and manufacturability.

[0291] Please refer again Fig.23 , and please also refer to Figure 6 and Figure 8 , where the row labeled S1 represents the magnetic poles, of which there are 6 magnetic poles, each magnetic pole includes 9 stator slots 211, then the number of slots occupied by each pole is C=9, and the number of magnetic pole pairs is P=3. The row labeled S2 represents the number of stator slots 211, of which there are 54 stator slots 211, numbered from J1, J2 to J54. The column labeled S3 represents the phase of the winding, Fig.23It is the U-phase winding. The label S4 column represents the number of the number N of the layers of the main body 311. Among them, the main body 311 has 4 layers, that is, N = 4, and the numbers range from T1 to T4. The T1 layer is the lead-out layer, and the T4 layer is the distal layer. The label S5 indicates the connection sequence number of each main body 311 connected in series in each phase winding, and it indicates the position of each layer of the main body 311 in each stator slot 211. Among them, the total number A of the main bodies 311 is 72, from 1 to 72. The first main body 311 and the 72nd main body 311 are connected to the lead-out wire G5. The conductor components 310 are A / 2 pairs, that is, 36 pairs are arranged. Then the E-th main body 311 is connected to the (E - 1)-th main body 311 through the first connection wire G41, E is an even number, and the E-th main body 311 and the (E - 1)-th main body 311 are respectively located on the M-th layer and the (M - 1)-th layer, M is an even number, M ≤ N, E ≤ A. When the B-th main body 311 and the (B + 1)-th main body 311 are respectively located on the T-th layer and the (T - 1)-th layer, B is an even number, then the B-th main body 311 and the (B + 1)-th main body 311 are connected by the inter-layer connection wire G421, B < A, T is an even number, T ≤ N.

[0292] K is a positive integer, and 2KNP < A, (2K - 1)NP + 1 < A. In the second connection wire G42 connecting the 2KP-th main body 311 and the (2KP + 1)-th main body 311: the 2KNP-th main body 311 and the (2KNP + 1)-th main body 311 are connected by the lead-out layer connection wire G4032. For example, the 24th main body 311 and the 25th main body 311 are connected by the lead-out layer connection wire G4032, and the 48th main body 311 and the 49th main body 311 are connected by the lead-out layer connection wire G4032. The (2K - 1)NP-th main body 311 and the ((2K - 1)NP + 1)-th main body 311 are connected by the distal layer connection wire G4031. For example, the 12th main body 311 and the 13th main body 311 are connected by the distal layer connection wire G4031, the 36th main body 311 and the 37th main body 311 are connected by the distal layer connection wire G4031, and the 60th main body 311 and the 61st main body 311 are connected by the distal layer connection wire G4031.

[0293] When the 2KPth main body 311 and the 2KP+1th main body 311 are located in the Hth layer and the H+1th layer respectively, H is an even number and N≥H, the 2KPth main body 311 and the 2KP+1th main body 311 are connected through the cross-layer connection line G422, such as the 6th main body 311 and the 7th main body 311 are connected through the cross-layer connection line G422, and the 18th main body 311 and the 19th main body 311 are connected through the cross-layer connection line G422. The 31st main body 311 is connected to the 32nd main body 311 through the cross-layer connection line G422, the 42nd main body 311 is connected to the 43rd main body 311 through the cross-layer connection line G422, the 54th main body 311 is connected to the 55th main body 311 through the cross-layer connection line G422, and the 66th main body 311 is connected to the 67th main body 311 through the cross-layer connection line G422. Fig. 20 It can be seen that the number of slots per pole per phase is q=3, the number of parallel branches is D=1, the number of single-pole single-phase slots in each parallel branch is F=3, and the number of phases of the winding structure 30 is X=3.

[0294] The U-phase winding, the V-phase winding and the W-phase winding are identical in connection structure, except that the stator slots 211 are offset during winding.

[0295] Fig.23 In the embodiment, the first connecting wire G41 is the inner connecting wire G401, and the pitch of the first connecting wire G41 is Y=Z / 2P+1=10, that is, the pitch of the inner connecting wire G401 is long. The second connecting wire G42 includes the same-layer connecting wire G403, the cross-layer connecting wire G422 and the inter-layer connecting wire G421. Among the same-layer connecting wires G403: the pitch of the lead-out layer connecting wire G4032 is short, and the pitch of the distal layer connecting wire G4031 is full. The cross-layer connecting wire G422 and the inter-layer connecting wire G421 are both outer connecting wires G402, and their pitches Y=Z / 2P-1=8, that is, the pitch of the outer connecting wire G402 is long. This structure can make the first connecting wire G41 preformed on the radial inner side of the winding structure 30 have the same pitch and coordinated cross-layer number, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly, and the radial inner side height of the winding structure 30 is small; and the pitch of the inner connecting wire G401 of the winding structure 30 is set to a short pitch, which can further reduce the radial inner side height of the winding structure 30, reduce copper loss, and increase the inner circle envelope size of the stator 20 using the winding structure 30, and expand the internal space of the stator 20. The radial outer side of the winding structure 30 is preferably formed in a lapped winding form, which is convenient for improving the consistency of the spacing between the welding points, improving the welding quality and manufacturability.

[0296] See also Figure 6 , Figure 8 and Fig.10, an embodiment of the present application provides a winding structure 30, which includes a plurality of conductor components 310 arranged in an annular body 300; the conductor components 310 include a main body portion 311, an inner side section 312, and an outer side section 313 integrally formed by a flat wire. The main body portion 311 extends along the radial direction of the annular body 300. The inner side section 312 is connected to the radially inner end of the main body portion 311, and the outer side section 313 is connected to the radially outer end of the main body portion 311; the main body portions 311 of the plurality of conductor components 310 are connected in series through a connection wire G4, and lead wires G5 are respectively provided at both ends formed by the series connection of the plurality of main body portions 311. The main body portions 311 of the annular body 300 are stacked in multiple layers along the axial direction. The connection wire G4 connecting two main body portions 311 in the same layer is the same-layer connection wire G403. The connection wires G4 other than the same-layer connection wire G403 include an outer connection wire G402 connecting the radially outer end of the main body portion 311 and an inner connection wire G401 connecting the radially inner end of the main body portion 311; the pitches of the inner connection wires G401 are all Y1, and the pitches of the outer connection wires G402 are all Y2, which is convenient for mass production to reduce costs and is also convenient for connecting paired conductor components 310; and Y1≠Z / 2P, Y2≠Z / 2P, Y1+Y2=Z / P, so as to reduce the harmonics of the winding structure 30, effectively reduce the eddy current loss. In addition, it is also beneficial to reduce the end height of the end where the short-pitch connection wire G4 in the winding is located, reduce the copper loss of the winding and the volume of the motor using this winding structure 30, and improve the power torque density. The connection wire G4 includes a first connection wire G41 and a second connection wire G42. The conductor components 310 are arranged in pairs, and each pair of conductor components 310 is integrally formed by a flat wire. Among the two pairs of conductor components 310 connected in series: the two outer side sections 313 in the middle are welded together. The main body portions 311 of the annular body 300 are stacked in N layers along the axial direction. The two main body portions 311 of each pair of conductor components 310 are respectively located in the Mth layer and the (M - 1)th layer; N is an even number, M is an even number, and N≥M. Along the axial direction of the annular body 300: the lead wires G5 connected to both ends of the series-connected main body portions 311 are located in the same layer. The main body portions 311 connected to the lead wires G5 are in the lead-out layer. The second connection wire G42 in the lead-out layer is the lead-out layer connection wire G4032. The layer far from the lead-out layer is the distal layer. The second connection wire G42 in the distal layer is the distal layer connection wire G4031. The lead-out layer connection wire G4032 and the distal layer connection wire G4031 are both the same-layer connection wire G403, so as to facilitate the setting of the same-layer connection wire G403. When the Bth main body portion 311 and the (B + 1)th main body portion 311 are respectively located in the Tth layer and the (T - 1)th layer, B is an even number, then the Bth main body portion 311 and the (B + 1)th main body portion 311 are connected by an inter-layer connection wire G421, B<A, T is an even number, and T≤N.Among the second connecting wires G42 connecting the 2KPth main body 311 and the 2KP+1th main body 311: the second connecting wire G42 connecting the 2KNPth main body 311 and the 2KNP+1th main body 311 is the lead-out layer connecting wire G4032, the second connecting wire G42 connecting the (2K-1)NPth main body 311 and the (2K-1)NP+1th main body 311 is the far-end layer connecting wire G4031, and the remaining second connecting wires G42 are cross-layer connecting wires G422, and the cross-layer connecting wires G422 and the inter-layer connecting wires G421 are both outer connecting wires G402, so as to facilitate the topological structure design and production of the winding structure 30.

[0297] This structure can make the radial inner side of the winding structure 30 preformed outer connection have the same pitch and number of cross layers, so that the radial inner side of the winding structure 30 can be arranged neatly and tightly. The radial outer side of the winding structure 30 forms a lapped winding form, which is convenient for improving the consistency of the welding point spacing, improving the welding quality and manufacturability. In addition, the number of motor poles and the number of stator slots 211 are adjusted as needed to improve the application range of the winding structure 30 and expand the motor power and torque range.

[0298] See also Figure 6 and Figure 8 According to some embodiments of the present application, the present application also provides a stator 20, comprising a winding structure 30 as described in any of the above embodiments.

[0299] The stator 20 of the embodiment of the present application uses the above winding structure 30, which is simplified and easy to assemble and manufacture. In addition, the winding structure 30 is made of flat wire, which increases the proportion of winding coils per unit area, thereby increasing the output torque of the axial motor 100 using the stator 20.

[0300] In some embodiments, the stator 20 further includes a stator core 21 , and the stator core 21 is provided with stator slots 211 for accommodating the main body 311 of the winding structure 30 , and the main body 311 is placed in the corresponding stator slots 211 .

[0301] The stator core 21 is set, and the main body 311 is placed in the corresponding stator slot 211. This not only makes it easy to fix the main body 311 and then install the fixed winding structure 30, but also can enhance the magnetic field strength generated by the winding structure 30 through the stator core 21, thereby improving the power of the axial motor 100 using the stator 20.

[0302] In some embodiments, the stator slots 211 are disposed on one axial side of the stator core 21 ; or, the stator slots 211 are disposed on two opposite axial sides of the stator core 21 .

[0303] A stator slot 211 is provided on one side of the stator core 21 , and a winding structure 30 can be installed on one side of the stator core 21 , so that the stator 20 using the stator core 21 can be suitable for the axial motor 100 , and the axial motor 100 has a rotor 10 provided on one side of its stator 20 .

[0304] Stator slots 211 are respectively provided on opposite sides of the stator core 21, and winding structures 30 can be respectively installed on opposite sides of the stator core 21, so that the stator 20 using the stator core 21 can be suitable for the axial motor 100, and the axial motor 100 is respectively provided with rotors 10 on opposite sides of its stator 20. Stator slots 211 are respectively provided on opposite sides of the stator core 21, and winding structures 30 are respectively installed on opposite sides of the stator core 21, which can also improve the integration degree.

[0305] In some embodiments, when stator slots 211 are respectively provided on opposite sides of the stator core 21, the stator slots 211 on opposite sides of the stator core 21 can be arranged at intervals, so that the portion of the stator core 21 in the middle in the axial direction forms a magnetic plate structure that separates the stator slots 211 on both sides, and the magnetic plate structure can shield the mutual influence between the magnetic fields of the winding structures 30 on both sides of the stator 20 to a certain extent, so as to improve the output torque and output efficiency of the axial motor 100 using the stator 20. In addition, the provision of the magnetic plate structure can also increase the structural strength of the stator core 21, thereby enhancing the structural strength of the stator 20.

[0306] In some embodiments, when the winding structure 30 is applied to the stator 20, the stator 20 may also not be provided with a stator core 21, that is, the winding structure 30 is applied to a coreless stator 20 to reduce the weight of the stator 20, thereby reducing the weight of the axial motor 100 using the stator 20.

[0307] In some embodiments, when the winding structure 30 is applied in a coreless stator 20 , the stator 20 may further include a support frame, and the winding structure 30 may be mounted on the support frame, and the winding structure 30 may be fixed and supported by the support frame to improve the structural strength of the stator 20 .

[0308] In some embodiments, when the winding structure 30 is supported by a support frame, the support frame can be manufactured separately and a mounting groove can be formed thereon to mount and fix the winding structure 30. The support frame can be manufactured from materials such as plastic, resin, and aluminum alloy.

[0309] In some embodiments, when the winding structure 30 is supported by a support frame, after the winding structure 30 is manufactured, mold injection molding can be used to form a support frame on the winding structure 30, so that the winding structure 30 and the support frame form an integrated structure to stably support the winding structure 30, so that the shape of the winding structure 30 remains stable and easy to use, and when generating a rotating magnetic field, it can withstand the reverse force of the magnetic field to drive the rotor 10 to rotate.

[0310] See also Figure 2 According to some embodiments of the present application, the present application also provides an axial motor 100, including a rotating shaft 11, a rotor 10 and a stator 20 as described in any of the above embodiments, the rotor 10 is fixedly mounted on the rotating shaft 11, the stator 20 is rotatably mounted on the rotating shaft 11, and the stator 20 is located on the side of the rotor 10.

[0311] The axial motor 100 of the embodiment of the present application uses the stator 20 of the above-mentioned embodiment, and the structure is simplified, which can reduce the cost, improve the manufacturing efficiency, and reduce the size of the axial motor 100.

[0312] In some embodiments, see Figures 2 to 4 , the stator 20 is disposed on at least one side of the rotor 10 ; and / or, the rotor 10 is disposed on at least one side of the stator 20 .

[0313] The stator 20 is arranged on at least one side of the rotor 10, which can facilitate the position layout of the stator 20. The stator 20 is arranged on at least one side of the stator 20, which can facilitate the position layout of the rotor 10.

[0314] In some embodiments, see Figures 3 to 5 There are multiple rotors 10, and a stator 20 is provided between two adjacent rotors 10; and / or there are multiple stators 20, and a rotor 10 is provided between two adjacent stators 20.

[0315] By providing a plurality of rotors 10, an axial motor 100 structure of multiple rotors 10 can be realized. By providing a plurality of stators 20, an axial motor 100 structure of multiple rotors 10 can be realized.

[0316] See also Figure 1 According to some embodiments of the present application, the present application also provides a power assembly, including the stator 20 as described in any of the above embodiments; or including the axial motor 100 as described in the above embodiments.

[0317] See also Figure 1 According to some embodiments of the present application, the present application also provides an output device, including the axial motor 100 as described in any of the above embodiments; or including the powertrain as described in the above embodiments.

[0318] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A winding structure, applied to a stator, wherein the number of stator slots of the stator is Z, and the number of magnetic pole pairs of the stator is P; characterized in that: The winding structure comprises a plurality of conductor components, wherein the plurality of conductor components are arranged in a ring shape; The conductor component comprises a main body portion for being placed in the stator slot, the main body portion extending in the radial direction of the annular body, the main bodies of at least some of the conductor components among the plurality of the conductor components are connected in series through connecting wires to form a winding, and lead wires are respectively provided at both ends of the winding; The annular body is stacked with multiple main body parts in the axial direction, and the connecting line connecting two main body parts in the same layer is a same-layer connecting line; the connecting lines other than the same-layer connecting lines: the connecting line connecting the radial outer ends of the main body parts is an outer connecting line, and the connecting line connecting the radial inner ends of the main body parts is an inner connecting line; The pitch of the inner connecting lines is Y1, the pitch of the outer connecting lines is Y2, and Y1≠Z / 2P, Y2≠Z / 2P, and Y1+Y2=Z / P.

2. The winding structure according to claim 1, characterized in that: The connecting wires are divided into a first connecting wire and a second connecting wire, the conductor components are arranged in pairs, and one end of the two main bodies of each pair of the conductor components is connected in series through the first connecting wire; in the two pairs of conductor components connected in series, the other end of the main body of one of the conductor components in one pair is connected to the other end of the main body of one of the conductor components in the other pair through the second connecting wire, and the second connecting wire includes the same-layer connecting wire.

3. The winding structure according to claim 2, characterized in that: The conductor component also includes an inner segment and an outer segment, the inner segment is connected to the radial inner end of the main body, and the outer segment is connected to the radial outer end of the main body; in the conductor components connected in series: the inner segment is connected to another inner segment to correspond to two conductor components in series, and the outer segment is connected to another outer segment to correspond to two conductor components in series.

4. The winding structure according to claim 3, characterized in that: The two connected inner sections are integrally formed, and the two integrally formed inner sections constitute the inner connecting line, and the inner connecting line forms the first connecting line; the two connected outer sections constitute the second connecting line; if the two main bodies connected by the second connecting line are in the same layer, then the second connecting line is the same layer connecting line, and the remaining second connecting lines are the outer connecting lines.

5. The winding structure according to claim 3, characterized in that: The two connected outer segments are integrally formed, and the two integrally formed outer segments constitute the outer connecting line, and the outer connecting line forms the first connecting line; the two connected inner segments constitute the second connecting line; if the two main bodies connected by the second connecting line are in the same layer, then the second connecting line is the same layer connecting line, and the remaining second connecting lines are the inner connecting lines.

6. The winding structure according to any one of claims 2 to 5, characterized in that: Along the axial direction of the annular body, the lead wires connected to both ends of the winding formed by the main body parts connected in series are located in the same layer.

7. The winding structure according to any one of claims 2 to 5, characterized in that: The annular body is stacked with N layers of main bodies along the axial direction, and the two main bodies of each pair of conductor components are respectively located at the Mth layer and the M-1th layer; N is an even number, M is an even number, and N≥M.

8. The winding structure according to claim 7, characterized in that: Along the axial direction of the annular body, the main body connected to the lead-out wire is in the lead-out layer, a layer away from the lead-out layer is a distal layer, the same-layer connecting wire in the lead-out layer is a lead-out layer connecting wire, and the same-layer connecting wire in the distal layer is a distal layer connecting wire; the lead-out layer is the 1st layer, and the distal layer is the Nth layer; or, the lead-out layer is the Nth layer, and the distal layer is the 1st layer.

9. The winding structure according to claim 8, characterized in that: The second connection line connecting the main body of the T-th layer and the main body of the T-1th layer is an interlayer connection line, T is an even number and N ≥ T; the second connection line connecting the main body of the H-th layer and the main body of the H+1th layer is a cross-layer connection line, H is an even number and N ≥ H; the number of the main bodies connected in series is A, and the first main body and the A-th main body are respectively connected to the lead-out line; Among the second connecting lines connecting the 2KPth main body and the 2KP+1th main body: the second connecting line connecting the 2KNPth main body and the 2KNP+1th main body is the lead-out layer connecting line, the second connecting line connecting the (2K-1)NPth main body and the (2K-1)NP+1th main body is the far-end layer connecting line, and the remaining second connecting lines are the cross-layer connecting lines, A is a positive integer, K is a positive integer, and 2KNP <A,(2K-1)NP+1<A。 10. The winding structure according to any one of claims 1 to 5 and 8 to 9, characterized in that: The cross-sectional shape of the main body is circular, elliptical or polygonal.

11. The winding structure according to any one of claims 1 to 5 and 8 to 9, characterized in that: The conductor component is made by integrally forming a flat wire.

12. The winding structure according to any one of claims 1 to 5 and 8 to 9, characterized in that: The number of the main bodies located in the same axial layer of the annular body and in the same magnetic pole is q, and when q is a positive integer q≥2, the q main bodies located in the same axial layer of the annular body and in the same magnetic pole are arranged adjacent to each other.

13. The winding structure according to any one of claims 1 to 5 and 8 to 9, characterized in that: The winding structure comprises a single-phase winding, and the winding is made of a plurality of the conductor components connected in series; Alternatively, the winding structure comprises a multi-phase winding, the winding is made of a plurality of the conductor components connected in series, the windings of each phase have the same structure, and the multi-phase windings are evenly distributed along the circumference of the winding structure.

14. The winding structure according to claim 13, characterized in that: Each phase of the winding includes at least two parallel branches.

15. A stator, characterized in that: Comprising the winding structure according to any one of claims 1-14.

16. The stator according to claim 15, characterized in that The stator further comprises a stator core, and the stator core is provided with stator slots for accommodating a main body of the winding structure, and the main body is arranged in the corresponding stator slots.

17. The stator according to claim 16, characterized in that The stator slots are provided on one axial side of the stator core; or, the stator slots are provided on two opposite axial sides of the stator core, respectively.

18. An axial motor, characterized in that: It comprises a rotating shaft, a rotor and a stator as claimed in any one of claims 15 to 17, wherein the rotor is fixedly mounted on the rotating shaft, the stator is rotatably mounted on the rotating shaft, and the stator is located on the side of the rotor.

19. A powertrain, characterized in that: It comprises the stator according to any one of claims 15 to 17; or it comprises the axial motor according to claim 18.

20. An output device, characterized in that: Comprising the powertrain as claimed in claim 19.

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