Concentrated stator winding, stator and motor

Abstract

The invention provides a concentrated stator winding, a stator and a motor, any phase of winding is formed by winding a wire, any phase of winding comprises a plurality of winding coils which are sequentially arranged along the circumferential direction of a stator core, adjacent winding coils are connected through a connecting overline, the connecting overline is arranged at the radial inner side of each phase of winding, and the connecting overline is arranged at the radial inner side of each phase of winding. The wire inlet end and the wire outlet end of each phase winding are arranged on the same winding coil, and the wire inlet end and the wire outlet end are arranged on any layer between the two axial sides of the winding coil. The beneficial effects of the invention are that the radial outer side of the stator winding is not provided with a connection overline, so that the outer side diameter of the stator core can be increased, the output torque and output power of the motor are improved, the technological process is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a concentrated stator winding, a stator and a motor. Background Art

[0002] In the prior art, for centralized stator windings, each phase winding is composed of multiple winding coils connected in series in sequence, and the connecting wires between adjacent winding coils are located at the outer circle of the phase winding. In view of the length limit of the connecting wires, the outer diameter of the stator core cannot be made too large, and the design of the outer diameter of the stator core is restricted, which in turn limits the output power and torque of the motor. Summary of the invention

[0003] In view of the above problems, the present invention provides a concentrated stator winding, a stator and a motor to solve the above or other former problems existing in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a concentrated stator winding, including a multi-phase winding, any phase winding is wound by a single wire, any phase winding includes a plurality of winding coils arranged in sequence along the circumferential direction of the stator core, adjacent winding coils are connected by connecting jumpers, the connecting jumpers are arranged on the radial inner side of each phase winding, the incoming line end and the outgoing line end of each phase winding are arranged on the same winding coil, and the incoming line end and the outgoing line end are arranged at any layer between the axial sides of the winding coil.

[0005] Furthermore, the inlet and outlet terminals of each phase winding are arranged radially outside the phase winding.

[0006] Furthermore, the connecting cross-wires of all phase windings are arranged on the radial inner side of the stator core, and the incoming wire ends and outgoing wire ends of all phase windings are arranged on the radial outer side of the stator core.

[0007] Furthermore, the inlet and outlet terminals of each phase winding are arranged in the middle layer between the axial sides of the winding coil.

[0008] Furthermore, any phase winding includes a first lead winding coil, a plurality of connected winding coils and a second lead winding coil connected in sequence, the first lead winding coil and the second lead winding coil are coaxially arranged, the first lead winding coil and the plurality of connected winding coils are arranged in sequence along the circumferential direction of the stator core, and the input and output ends of any phase winding are respectively arranged on the first lead winding coil and the second lead winding coil.

[0009] Furthermore, the axial number of layers of the first lead winding coil and the axial number of layers of the second lead winding coil are both smaller than the axial number of layers of the connecting winding coil, the total height of the first lead winding coil and the second lead winding coil is consistent with the height of the connecting winding coil, and the coil input end of the first lead winding coil and the coil output end of the second lead winding coil are arranged at the same axial layer.

[0010] Furthermore, the coil inlet end and the coil outlet end of the first lead winding coil are both arranged along the radial direction of the stator core, and the coil inlet end and the coil outlet end of the first lead winding coil are arranged in the same slot of the stator core, and the coil inlet end and the coil outlet end of the second lead winding coil are both arranged along the radial direction of the stator core, and the coil inlet end and the coil outlet end of the second lead winding coil are arranged in the same slot of the stator core, and the coil inlet end of the first lead winding coil and the coil inlet end of the second lead winding coil are respectively arranged in the slots on both sides of the same tooth of the stator core.

[0011] Furthermore, the connecting winding coil, the first lead winding coil and the second lead winding coil all include a coil body, the coil body includes an inner turning portion, a first straight portion and a second straight portion respectively connected to the two ends of the inner turning portion, and an outer turning portion connected to the first straight portion and the second straight portion, the inner turning portion is arranged on the radial inner side of the stator core, the outer turning portion is arranged on the radial outer side of the stator core, the first straight portion and the second straight portion are both arranged along the radial direction of the stator core, and the first straight portion and the second straight portion are respectively arranged in the slots on both sides of the circumferential direction of the same tooth of the stator core.

[0012] Furthermore, the conductive wire constituting the first lead winding coil, the conductive wire constituting the second lead winding coil and the conductive wire constituting the connecting winding coil are all flat copper wires.

[0013] Furthermore, the connecting winding coil, the first lead winding coil and the second lead winding coil are all formed in one piece by winding a plurality of turns of a conducting wire along the axial direction of the teeth of the stator core.

[0014] Furthermore, the axis of any phase winding is coaxially arranged with the axis of the stator core.

[0015] A stator comprises a stator core and the above-mentioned concentrated stator winding, wherein the concentrated stator winding is arranged on the stator core, and the outer corners of the teeth of the stator core are rounded structures.

[0016] A motor comprises the stator as described above.

[0017] Due to the adoption of the above technical solution, in the concentrated stator winding, two adjacent winding coils in each phase winding are connected by connecting cross-wires, and the connecting cross-wires are arranged on the radial inner side of the stator winding, so that the radial outer side of the stator winding does not have connecting cross-wires, so that the outer diameter of the stator core can be increased, thereby improving the output torque and output power of the motor, simplifying the process, and reducing the production cost; the inlet and outlet ends of each phase winding are arranged on the radial outer side of the stator winding, the inlet and outlet ends of any phase winding are arranged on the same winding coil, and any phase winding The inlet and outlet terminals are located at any layer between the axial sides of the winding coil, which is convenient for winding the winding coil; the outer corners of the teeth of the stator core are chamfered, so that when the winding coil is wound on the teeth of the stator core, the wire is close to the outer circle of the outer rounded structure of the tooth, reducing the height of the radial outer end of the winding coil, increasing the outer boundary of the stator core, and further improving the output torque density and power density of the motor; the radial inner side of the teeth of the stator core is not chamfered, so that the electrical load at this location will not be too high or saturated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a stator according to an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of a concentrated stator winding according to an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a phase winding according to an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a lead winding coil according to an embodiment of the present invention;

[0022] Figure 5 is a structural schematic diagram of a connected winding coil according to an embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of a phase winding according to an embodiment of the present invention (excluding the second lead winding coil).

[0024] In the figure:

[0025] 1. stator winding 2. stator core 10. first lead winding coil

[0026] 11. Connect the winding coil 12. Connect the cross-line 13. Incoming line terminal

[0027] 14, outlet terminal 15, second lead winding coil 103, outer turning portion

[0028] 104, first straight portion 105, second straight portion 106, coil inlet terminal

[0029] 107, coil outlet 108, inner turning part DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Figure 1 A structural schematic diagram of an embodiment of the present invention is shown. This embodiment relates to a concentrated stator winding, a stator and a motor. In any phase winding of the concentrated stator winding, a connecting wire connecting two adjacent winding coils is arranged on the radial inner side of the phase winding, the incoming wire end and the outgoing wire end of the phase winding are arranged on the same winding coil, and the incoming wire end and the outgoing wire end of the phase winding are both arranged on the same layer in the middle of the winding coil. At the same time, the incoming wire end and the outgoing wire end of the phase winding are arranged on the radial outer side of the phase winding, which simplifies the process and reduces the production cost. At the same time, since the outer side of the stator core does not have a connecting wire, the outer diameter of the stator core can be further increased, thereby improving the output power and output torque of the motor.

[0032] A concentrated stator winding, such as Figure 1-3 As shown, it includes multi-phase windings, and the multi-phase windings are all arranged on the stator core 2. The stator winding 1 is a circular ring structure, and the phase windings constituting the stator winding 1 are also circular ring structures. The structures of the phase windings are the same, but the teeth of the stator core 2 occupied when installed on the stator core 2 are different. The stator winding 1 is coaxially arranged with the stator core 2, that is, the axis of the stator winding 1 is parallel to the axis of the stator core 2, so each phase winding is also coaxially arranged with the stator core 2. Each phase winding is wound by a wire and is integrally formed.

[0033] Among them, any phase winding includes multiple winding coils arranged in sequence along the circumferential direction of the stator core 2, each winding coil is mounted on a tooth of the stator core 2, and adjacent winding coils are connected by connecting jumpers 12. The connecting jumpers 12 are arranged on the radial inner side of any phase winding. That is, in each phase winding, along the circumferential direction of the stator core 2, each winding coil is connected in sequence by connecting jumpers 12, so that multiple winding coils are connected in series to form a one-phase winding structure. Two adjacent winding coils are connected by a connecting jumper 12, which is arranged on the radial inner side of the phase winding. According to the installation method of the phase winding on the stator core 2, the connecting jumper 12 is also located on the radial inner side of the stator core 2. When the connecting jumper 12 is connected to two adjacent winding coils, one end of the connecting jumper 12 is connected to the coil outlet terminal 107 of one winding coil, and the other end of the connecting jumper 12 is connected to the coil inlet terminal 106 of the other winding coil, so that the two winding coils are connected in series. The connecting jumper 12 is fixedly connected to the coil inlet terminal 106 and the coil outlet terminal 107 of the winding coil, respectively, and the fixed connection method is preferably integrally formed. The wire type of the connecting jumper 12 is consistent with the wire type constituting the winding coil.

[0034] In some feasible embodiments, preferably, any phase winding is wound by a wire according to a designed winding method and formed as one piece, the incoming end of the wire is the incoming end 13 of the phase winding, and the outgoing end of the wire is the outgoing end 14 of the phase winding.

[0035] Each phase winding has an input terminal 13 and an output terminal 14, and the input terminal 13 and the output terminal 14 of each phase winding are arranged on the same winding coil, and the input terminal 13 and the output terminal 14 are arranged on any layer between the two axial side surfaces of the winding coil, and the input terminal 13 and the output terminal 14 are arranged on the radial outside of any phase winding, that is, among the multiple winding coils of any phase winding, the input terminal 13 and the output terminal 14 of the phase winding are arranged on any winding coil, and the selection of the winding coil is selected according to the actual design requirements of the stator winding 1, and no specific requirements are made here. The axis of the winding coil is arranged parallel to the axis of the stator winding 1, that is, the axis of the winding coil is arranged parallel to the axis of the stator core 2, therefore, the winding coil has two axial side surfaces (upper side surface and lower side surface) along its own axial direction, and the inlet terminal 13 and the outlet terminal 14 of the phase winding are arranged at any layer between the two axial side surfaces of the same winding coil, that is, the inlet terminal 13 and the outlet terminal 14 of the phase winding are not arranged on the axial upper side surface and the axial lower side surface of the winding coil, but are located at any layer between the uppermost layer (the layer where the upper side surface is located) and the lowermost layer (the layer where the lower side surface is located), that is, the inlet terminal 13 and the outlet terminal 14 of the phase winding are located at the same layer, and the layer where the inlet terminal 13 and the outlet terminal 14 are located is selected according to the actual design requirements of the stator winding 1, and no specific requirements are made here. At the same time, when the inlet terminal 13 and the outlet terminal 14 of the phase winding are set, the inlet terminal 13 and the outlet terminal 14 are set along the radial direction of the stator core 2, and the inlet terminal 13 and the outlet terminal 14 are located on the radial outside of the phase winding. According to the installation method of the stator winding 1 on the stator core 2, the inlet terminal 13 and the outlet terminal 14 of any phase winding are also located on the radial outside of the stator core 2, that is, in any phase winding, the connecting jumper 12 and the lead wire (inlet terminal 13, outlet terminal 14) are respectively located on the radial inside and radial outside of the stator core 2, and the connecting jumper 12 is set on the radial inside of the stator core 2, which simplifies the process and reduces the production cost. At the same time, the connecting jumper 12 is not set on the radial outside of the stator core 2, which can further increase the outer diameter of the stator core 2 and improve the output torque and output power of the motor.

[0036] In some feasible embodiments, preferably, in order to facilitate the preparation of a winding coil provided with an inlet terminal 13 and an outlet terminal 14 of a phase winding, the inlet terminal 13 and the outlet terminal 14 of any phase winding are arranged in an intermediate layer between the axial sides of the winding coil, that is, in the winding coil, winding coils are arranged axially above and axially below the intermediate layer where the inlet terminal 13 and the outlet terminal 14 of the phase winding are arranged, and the structures of the winding coils axially above and axially below are the same, which facilitates winding during preparation.

[0037] When preparing any phase winding, first prepare a winding coil provided with an inlet terminal 13 and an outlet terminal 14 of the phase winding, first wind the winding coil axially below the coil winding, and connect the inlet terminal 13 of the phase winding to the winding coil, the outlet of the winding coil is connected to a winding coil not provided with an inlet terminal 13 and an outlet terminal 14 of the phase winding through a connecting crossover 12, and the winding coil is connected to the remaining winding coils not provided with an inlet terminal 13 and an outlet terminal 14 of the phase winding in sequence through the connecting crossover 12, and the outlet of the last winding coil not provided with an inlet terminal 13 and an outlet terminal 14 of the phase winding is connected to the winding coil axially above the winding coil provided with an inlet terminal 13 and an outlet terminal 14 of the phase winding through a connecting crossover 12, and the outlet of the winding coil is connected to the outlet terminal 14 of the phase winding, forming a phase winding structure.

[0038] The structures of the phase windings are the same. Therefore, in the concentrated stator winding, the connecting cross-wires 12 of all phase windings are located on the radial inside of the stator winding, and the incoming wire ends 13 and the outgoing wire ends 14 of all phase windings are located on the radial outside of the stator winding, that is, the connecting cross-wires 12 of all phase windings are located on the radial inside of the stator core 2, and the incoming wire ends 13 and the outgoing wire ends 14 of all phase windings are located on the radial outside of the stator core 2.

[0039] Specifically, Figure 3-6As shown, according to the setting positions of the inlet terminal 13 and the outlet terminal 14 of any phase winding, any phase winding includes a first lead winding coil 10, a plurality of connecting winding coils 11 and a second lead winding coil 15 connected in sequence, the first lead winding coil 10 and the second lead winding coil 15 are coaxially arranged, that is, the first lead winding coil 10 and the second lead winding coil 15 are arranged on the same tooth of the stator core 2, any connecting winding coil 11 is arranged on a tooth of the stator core 2, and the plurality of connecting winding coils 11 are respectively arranged on different teeth of the stator core 2, the first lead winding coil 10 and the plurality of connecting winding coils 11 are sequentially arranged along the circumferential direction of the stator core 2, and are respectively arranged on each tooth of the stator core 2 occupied by the phase winding, the inlet terminal 13 and the outlet terminal 14 of any phase winding are respectively arranged on the first lead winding coil 10 and the second lead winding coil 15 ... On the circle 10 and the second lead winding coil 15, that is, along the circumferential direction of the stator core 2, the first lead winding coil 10 is connected to the first connecting winding coil 11, the first connecting winding coil 11 is connected to the second connecting winding coil 11, and so on, the last connecting winding coil 11 is connected to the second lead winding coil 15, the coil input terminal 106 of the first lead winding coil 10 is connected to the input terminal 13 of a phase winding, the coil output terminal 107 of the first lead winding coil 10 is connected to the connecting winding coil 11 on one side through the connecting cross-wire 12, the coil input terminal 106 of the second lead winding coil 15 is connected to the connecting winding coil 11 on the other side through the connecting cross-wire 12, and the coil output terminal 107 of the second lead winding coil 15 is connected to the output terminal 14 of a phase winding, forming a phase winding structure.

[0040] The axial number of layers of the first lead winding coil 10 and the axial number of layers of the second lead winding coil 15 are both smaller than the axial number of layers of the connecting winding coil 11, that is, along the axial direction of the first lead winding coil 10, the height of the first lead winding coil 10 and the height of the second lead winding 15 are both smaller than the height of the connecting winding coil 11, and the heights of the connecting winding coils 11 are consistent. The height of the first lead winding coil 10 can be greater than the height of the second lead winding coil 15, or the height of the first lead winding coil 10 can be less than the height of the second lead winding coil 15. The height of the first lead winding coil 10 and the height of the second lead winding coil 15 are selected according to actual needs, and the total height of the first lead winding coil 10 and the second lead winding coil 15 is equal to the total height of the connecting winding coil 11. 1, so that the stator winding is installed on the stator core 2, and the coil inlet terminal 106 of the first lead winding coil 10 and the coil outlet terminal 107 of the second lead winding coil 15 are arranged in the same axial layer, that is, along the axial direction of the first lead winding coil 10, the coil inlet terminal 106 of the first lead winding coil 10 and the coil outlet terminal 107 of the second lead winding coil 15 are respectively arranged on the side surfaces of the first lead winding coil 10 and the second lead winding coil 15 that are opposite to each other, and the two side surfaces are located in the same plane, so that the coil inlet terminal 106 of the first lead winding coil 10 and the coil outlet terminal 107 of the second lead winding coil 15 are located in the same axial layer of the winding coil composed of the first lead winding coil 10 and the second lead winding coil 11.

[0041] In some feasible embodiments, the second lead winding coil 15 and the first lead winding coil 10 are arranged up and down along the axial direction of the stator core 2, and the first lead winding coil 10 and the second lead winding coil 15 are both wound by a single wire and are an integrally formed structure, so the inlet end 13 of the phase winding is protrudingly arranged on the axial upper side of the first lead winding coil 10, and the outlet end 14 of the phase winding is protrudingly arranged on the axial lower side of the second lead winding coil 15. The inlet end 13 and the outlet end 14 of the phase winding are both arranged along the radial direction of the stator core 2, the inlet end 13 of the phase winding is connected to the coil inlet end 106 of the first lead winding coil 10, and the outlet end 14 of the phase winding is connected to the coil outlet end 107 of the second lead winding coil 15.

[0042] The coil inlet terminal 106 and the coil outlet terminal 107 of the first lead winding coil 10 are both arranged along the radial direction of the stator core 2. The coil inlet terminal 106 and the coil outlet terminal 107 of the first lead winding coil 10 are arranged in the same slot of the stator core 2, and the coil inlet terminal 106 of the first lead winding coil 10 is opposite to the radial extension direction of the coil outlet terminal 107 along the stator core 2 along the radial extension direction of the stator core 2. The coil inlet terminal 106 of the first lead winding coil 10 extends away from the axial direction of the stator core 2 and is located on the radial outside of the stator core 2 so as to be connected to the inlet terminal 13 of the phase winding. The coil outlet terminal 107 of the first lead winding coil 10 extends close to the axial direction of the stator core 2 and is located on the radial inside of the stator core 2 so as to be connected to the connecting winding coil 11 through the connecting cross-wire 12. When the first lead winding coil 10 is wound, it is wound multiple times in sequence along its axial direction downward and along the circumferential direction of the teeth. The coil inlet terminal 106 and the coil outlet terminal 107 of the first lead winding coil 10 are respectively located on the axial upper side and the axial lower side of the first lead winding coil 10.

[0043] The coil inlet terminal 106 and the coil outlet terminal 107 of the second lead winding coil 15 are both arranged along the radial direction of the stator core 2. The coil inlet terminal 106 and the coil outlet terminal 107 of the second lead winding coil 15 are arranged in the same slot of the stator core 2, and the coil inlet terminal 106 of the second lead winding coil 15 is opposite to the radial extension direction of the stator core 2 and the radial extension direction of the coil outlet terminal 107 along the stator core 2. The coil outlet terminal 107 of the second lead winding coil 15 extends in the axial direction away from the stator core 2 and is located on the radial outside of the stator core 2 so as to be connected to the outlet terminal 14 of the phase winding. The coil inlet terminal 106 of the second lead winding coil 15 extends in the axial direction close to the stator core 2 and is located on the radial inside of the stator core 2 so as to be connected to the connecting winding coil 11 through the connecting cross-wire 12. When the second lead winding coil 15 is wound, it is wound in multiple turns in the axial direction and downward along the circumferential direction of the tooth. The coil inlet end 106 and the coil outlet end 107 of the second lead winding coil 15 are respectively located on the axial upper side and the axial lower side of the second lead winding coil 10. The coil inlet end 106 of the first lead winding coil 10 and the coil inlet end 106 of the second lead winding coil 15 are located in different slots. The coil inlet end 106 of the first lead winding coil 10 and the coil inlet end 106 of the second lead winding coil 15 are respectively arranged in the slots on both sides of the same tooth of the stator core 2.

[0044] Structurally, the connecting winding coil 11, the first lead winding coil 10 and the second lead winding coil 15 all include a coil body, and the height of the coil body of the first lead winding coil 10 and the height of the coil body of the second lead winding coil 15 are both smaller than the height of the coil body of the connecting winding coil 11, so that the height (axial direction) of the winding coil 10 formed by the first lead winding coil 10 and the second lead winding coil 15 is consistent with the height (axial direction) of the connecting winding coil 11.

[0045] For the connected winding coil 11, a coil input terminal 106 and a coil output terminal 107 are respectively arranged on the axial sides of the coil body along the axial direction of the connected winding coil 11. The coil input terminal 106 is connected to a coil output terminal 107 of a connected winding coil 11 or a first lead winding coil 10 through a connecting jumper 12, and the coil output terminal 107 is connected to another coil output terminal 107 of a connected winding coil 11 or a second lead winding coil 15 through a connecting jumper 12.

[0046] The coil body is an annular structure, and its shape is adapted to the shape of the teeth of the stator core 2. The coil body is mounted on a tooth of the stator core 2. The coil body includes an inner turn portion 108, a first straight portion 104 and a second straight portion 105 respectively connected to both ends of the inner turn portion 108, and an outer turn portion 103 connected to both the first straight portion 104 and the second straight portion 105. When the coil body is mounted on the teeth of the stator core 2, the inner turn portion 108 is located radially inwardly close to the axis of the stator core 2, and the inner turn portion 108 corresponds to the radial inner side of the teeth of the stator core 2, and the outer turn portion 103 is located radially outwardly away from the axis of the stator core 2. On the side, the outer turn portion 103 corresponds to the radial outer side surface of the tooth of the stator core 2, the first straight portion 104 and the second straight portion 105 are respectively arranged in the slots on both sides of a tooth of the stator core 2, the two ends of the first straight portion 104 are respectively fixedly connected to a group of corresponding ends of the inner turn portion 108 and the outer turn portion 103, and the two ends of the second straight portion 105 are respectively fixedly connected to another group of corresponding ends of the inner turn portion 108 and the outer turn portion 103, thereby constructing the overall structure of the coil body in a ring shape. For the connection winding coil 11, the coil input terminal 106 and the coil output terminal 107 are respectively connected to the first straight portion 104 and the second straight portion 105. For the first lead winding coil 10, the coil input terminal 106 and the coil output terminal 107 are both connected to the first straight portion 104 or the second straight portion 105. For the second lead winding coil 5, the coil input terminal 106 and the coil output terminal 107 are both connected to the second straight portion 105 or the first straight portion 104.

[0047] The first straight portion 104 and the second straight portion 105 each include a plurality of conductive wires, and the shapes of the conductive wires constituting the first straight portion 104 and the second straight portion 105 are both straight lines. The plurality of conductive wires are stacked in sequence along the axial direction of the coil body, that is, the second conductive wire is placed above the first conductive wire, the third conductive wire is placed above the second conductive wire, and so on. The plurality of conductive wires are located in the same plane to form a conductive wire group, forming the structure of the first straight portion 104 and the structure of the second straight portion 105, so that the first straight portion 104 and the second straight portion 105 can be disposed in the slots of the stator core 2.

[0048] The outer turning portion 103 and the inner turning portion 108 also include a plurality of conducting wires. The conducting wires constituting the outer turning portion 103 and the inner turning portion 108 are in an arc shape. According to the shape of the teeth of the stator core 2, the shape of the conducting wires of the inner turning portion 108 is preferably a semicircular arc or a minor arc. The conducting wires of the outer turning portion 103 include a straight segment and arc segments arranged at both ends of the straight segment. The straight segment is fixedly connected to the arc segment. The arc segment plays a role of transition, so that the two ends of the straight segment are connected to the corresponding conducting wires in the first straight segment 104 and the corresponding conducting wires in the second straight segment 105 respectively. The shape of the arc segment is adapted to the shape of the outer corner of the teeth of the stator core 2, that is, the outer corner of the teeth of the stator core 2 is chamfered so that when the coil body is mounted on the teeth of the stator core 2, the outer turning portion 103, the first straight portion 104 and the second straight portion 105 can be in close contact with the circumferential side surfaces and the axial outer side surfaces of the teeth of the stator core 2. The multiple wires of the outer turn portion 103 and the inner turn portion 108 are stacked in sequence along the axial direction of the coil body, that is, the second wire is arranged on the first wire, the third wire is arranged on the second wire, and so on. The multiple wires are located in the same plane to form a wire group, constructing the structure of the outer turn portion 103 and the structure of the inner turn portion 108.

[0049] Any one of the conducting wires of the first straight portion 104 is fixedly connected to the corresponding conducting wires of the inner turn portion 108 and the outer turn portion 103, respectively; any one of the conducting wires of the second straight portion 105 is fixedly connected to the corresponding conducting wires of the side turn portion and the outer turn portion 103, respectively; the first straight portion 104 is fixedly connected to the outer turn portion 103 and the inner turn portion 108 by being preferably integrally formed; the second straight portion 105 is fixedly connected to the outer turn portion 103 and the inner turn portion 108 by being preferably integrally formed. Therefore, when preparing the coil body, the coil body is formed by winding a wire in sequence along the circumferential direction of the teeth of the stator core 2 and along the axial direction of the stator core 2, that is, when preparing the coil body, the wire is first wound along the circumferential direction of the teeth of the stator core 2 for one circle, and moved along the axial direction of the stator core 2 by the thickness of the wire, and then a second circle is wound, and moved along the axial direction of the stator core 2 by the thickness of the wire, and then a third circle is wound, and so on, a wire is wound along the circumferential direction of the teeth of the stator core 2 and moved along the axial direction of the stator core 2, so as to perform multiple circles of winding to form a ring-shaped coil body structure with a certain height, and the two ends of the wire are respectively located on the lower side and the upper side of the coil body, which are the coil inlet terminal 106 and the coil outlet terminal 107, respectively.

[0050] In some feasible embodiments, the conductive wire constituting the first lead winding coil 10 , the conductive wire constituting the second lead winding coil 15 , and the conductive wire constituting the connecting winding coil 11 are all flat copper wires.

[0051] The connecting winding coil 11, the first lead winding coil 10 and the second lead winding coil 15 are all formed as one piece by winding a plurality of turns of a conductive wire along the axial direction of the teeth of the stator core 2. That is, any phase winding is formed as one piece by winding a conductive wire in sequence along each circumferential tooth of the stator core 2 according to a designed shape.

[0052] According to the structure of the stator, in the stator winding 1 , the axis of any phase winding is coaxially arranged with the axis of the stator core 2 , and the axis of any winding coil is parallelly arranged with the axis of the stator core 2 .

[0053] The specific structure of any phase winding in the stator winding is described below, taking an example in which a phase winding has five connected winding coils 11, a first lead winding coil 10 and a second lead winding coil 15.

[0054] In any phase winding, five connecting winding coils 11 and a first lead winding coil 10 are arranged in sequence along the circumferential direction of the stator core 2. The inlet end 13 of the phase winding is one end of the wire wound around the phase winding, and the end of the wire extends to the radial outer side of the stator core 2. The wire is wound multiple times in the axial downward direction of a tooth of the stator core 2 to form the first lead winding coil 10, and then extends from the slot where the inlet end 13 of the phase winding is located toward the radial inner side of the stator core 2 and enters a slot where the first connecting winding coil 11 is located, as the coil inlet end 106 of the first connecting winding coil 11, and is wound multiple times in the axial downward direction of the tooth of the stator core 2 where the first connecting winding coil 11 is located, and extends from another slot where the first connecting winding coil 11 is located toward the radial inner side of the stator core 2 and enters the second A slot where the first connecting winding coil 11 is located is used as the coil inlet terminal 106 of the second connecting winding coil 11. The winding method of the first connecting winding coil 11 is repeated to wind the second connecting winding coil 11. By analogy, the third connecting winding coil 11, the fourth connecting winding coil 11 and the fifth connecting winding coil 11 are wound in sequence. The wire extends from a slot occupied by the fifth connecting winding coil 11 and enters a slot of the second lead winding coil 15. The slot is the slot where the outlet terminal 14 of the phase winding is located. Along the axial downward direction of the second lead winding coil 15, the wire is wound multiple times along the circumferential direction of the teeth of the stator core 2, and extends from the layer where the inlet terminal 13 of the phase winding is located, extending to the radial outer side of the stator core 2. This end of the wire is the outlet terminal 14 of the phase winding, completing the winding of one phase winding. The winding method of other phase windings is the same as that of this phase winding.

[0055] A stator, such as Figure 1 As shown, it includes a stator core 2 and the concentrated stator winding 1 as mentioned above, the concentrated stator winding 1 is arranged on the stator core 2, the outer corners of the teeth of the stator core 2 are rounded structures, the outer corners of the teeth of the stator core 2 are chamfered to form a rounded structure, the outer corners of the teeth of the stator core 2 are adapted to the arc section of the winding coil, so that the outer turning portion 103 of the winding coil can fit with the radial outer side surface of the teeth of the stator core 2.

[0056] A motor comprises the stator as described above.

[0057] Due to the adoption of the above technical solution, in the concentrated stator winding, two adjacent winding coils in each phase winding are connected by connecting cross-wires, and the connecting cross-wires are arranged on the radial inner side of the stator winding, so that the radial outer side of the stator winding does not have connecting cross-wires, so that the outer diameter of the stator core can be increased, thereby improving the output torque and output power of the motor, simplifying the process, and reducing the production cost; the inlet and outlet ends of each phase winding are arranged on the radial outer side of the stator winding, the inlet and outlet ends of any phase winding are arranged on the same winding coil, and any phase winding The inlet and outlet terminals are located at any layer between the axial sides of the winding coil, which is convenient for winding the winding coil; the outer corners of the teeth of the stator core are chamfered, so that when the winding coil is wound on the teeth of the stator core, the wire is close to the outer circle of the outer rounded structure of the tooth, reducing the height of the radial outer end of the winding coil, increasing the outer boundary of the stator core, and further improving the output torque density and power density of the motor; the radial inner side of the teeth of the stator core is not chamfered, so that the electrical load at this location will not be too high or saturated.

[0058] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A concentrated stator winding, comprising a multi-phase winding, wherein any phase winding is wound by a single wire, and any phase winding comprises a plurality of winding coils arranged in sequence along the circumferential direction of the stator core, and adjacent winding coils are connected by connecting crossover wires, characterized in that: The connecting line is arranged on the radial inner side of each phase winding, the inlet and outlet ends of each phase winding are arranged on the same winding coil, and the inlet and outlet ends are arranged on any layer between the axial sides of the winding coil.

2. The concentrated stator winding according to claim 1, characterized in that: The inlet terminal and the outlet terminal of each phase winding are arranged on the radial outer side of the phase winding.

3. The concentrated stator winding according to claim 2, characterized in that: The connecting cross-wires of all phase windings are arranged on the radial inner side of the stator core, and the inlet and outlet ends of all phase windings are arranged on the radial outer side of the stator core.

4. The concentrated stator winding according to any one of claims 1 to 3, characterized in that: The inlet terminal and the outlet terminal of each phase winding are arranged in the middle layer between the axial sides of the winding coil.

5. The concentrated stator winding according to any one of claims 1 to 4, characterized in that: Any phase winding includes a first lead winding coil, a plurality of connecting winding coils and a second lead winding coil connected in sequence, the first lead winding coil and the second lead winding coil are coaxially arranged, the first lead winding coil and the plurality of connecting winding coils are arranged in sequence along the circumferential direction of the stator core, and the input terminal and the output terminal of any phase winding are respectively arranged on the first lead winding coil and the second lead winding coil.

6. The concentrated stator winding according to claim 5, characterized in that: The axial number of layers of the first lead winding coil and the axial number of layers of the second lead winding coil are both smaller than the axial number of layers of the connecting winding coil, the total height of the first lead winding coil and the second lead winding coil is consistent with the height of the connecting winding coil, and the coil input end of the first lead winding coil and the coil output end of the second lead winding coil are arranged at the same axial layer.

7. The concentrated stator winding according to claim 6, characterized in that: The coil inlet end and the coil outlet end of the first lead winding coil are both arranged along the radial direction of the stator core, and the coil inlet end and the coil outlet end of the first lead winding coil are arranged in the same slot of the stator core. The coil inlet end and the coil outlet end of the second lead winding coil are both arranged along the radial direction of the stator core, and the coil inlet end and the coil outlet end of the second lead winding coil are arranged in the same slot of the stator core. The coil inlet end of the first lead winding coil and the coil inlet end of the second lead winding coil are respectively arranged in the slots on both sides of the same tooth of the stator core.

8. The concentrated stator winding according to claim 5, characterized in that: The connecting winding coil, the first lead winding coil and the second lead winding coil all include a coil body, and the coil body includes an inner turning portion, a first straight portion and a second straight portion respectively connected to the two ends of the inner turning portion, and an outer turning portion connected to the first straight portion and the second straight portion, the inner turning portion is arranged on the radial inner side of the stator core, the outer turning portion is arranged on the radial outer side of the stator core, the first straight portion and the second straight portion are both arranged along the radial direction of the stator core, and the first straight portion and the second straight portion are respectively arranged in the slots on both sides of the circumferential direction of the same tooth of the stator core.

9. The concentrated stator winding according to claim 5, characterized in that: The conductive wire constituting the first lead winding coil, the conductive wire constituting the second lead winding coil, and the conductive wire constituting the connecting winding coil are all rectangular copper wires.

10. The concentrated stator winding according to any one of claims 6 to 9, characterized in that: The connecting winding coil, the first lead winding coil and the second lead winding coil are all formed in one piece by winding a plurality of turns of a conducting wire along the axial direction of the teeth of the stator core.

11. The concentrated stator winding according to claim 1, characterized in that: The axis of any phase winding is coaxially arranged with the axis of the stator core.

12. A stator, characterized in that: It comprises a stator core and a concentrated stator winding as claimed in any one of claims 1 to 11, wherein the concentrated stator winding is arranged on the stator core, and the outer corners of the teeth of the stator core are rounded structures.

13. A motor, characterized in that: Comprising the stator as claimed in claim 12.

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