Flat wire stator and flat wire motor

Abstract

The utility model discloses a flat wire stator and a flat wire motor, comprising a stator core and a stator winding, the stator core is provided with 48 stator slots at intervals, each stator slot is internally provided with a plurality of wire layers, the wire layers in each stator slot are sequentially arranged from inside to outside along the radial direction, and the stator winding is a three-phase winding; each phase winding comprises four parallel branches, each branch comprises a first leading-out end and a second leading-out end, the first leading-out ends of the branches in the same phase are respectively connected to different wire layers in the same stator slot, and the second leading-out ends of the branches in the same phase are respectively connected to different wire layers in the same stator slot. And the first leading-out end and the second leading-out end are respectively led out of different stator slots. In the four branches of each phase winding, each first leading-out end is led out from the same stator slot, and each second leading-out end is led out from the same stator slot, so that only two stator slots of each phase are provided with the leading-out ends, the wiring is simple, and the circuit is neat after wiring.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stator winding, more particularly to a flat wire stator and flat wire motor. BACKGROUND

[0002] With the development of new energy vehicles, hybrid power vehicles and pure electric vehicles have higher and higher requirements for the power density and quality of motors, and traditional round copper wire motors cannot meet the requirements, flat copper wire motors improve the power density compared with round wire motors, can meet the demand of new energy vehicles, and with the increase of the number of flat wire layers, the power density also increases accordingly.

[0003] In the prior art, the connection mode commonly used for 8-layer flat copper wire armature winding is that each phase is divided into 4 branches, the 1st and 2nd layers of copper wire constitute the first branch, the 3rd and 4th layers of copper wire constitute the second branch, the 5th and 6th layers of copper wire constitute the third branch, and the 7th and 8th layers of copper wire constitute the fourth branch; this connection mode has the following problems: the outgoing lines of the 4 branches of the same phase winding are respectively led out from different slot positions, resulting in complicated winding connection, for example, the connection mode disclosed in the "new type short-pitch winding stator and motor" disclosed in the publication No. CN112751438A has the above-mentioned problems.

[0004] Therefore, the present inventors have conducted in-depth research on the above problems, and thus the present application is produced. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a flat wire stator with simple and regular wiring.

[0006] To achieve the above-mentioned purpose, the solution of the utility model is as follows:

[0007] A flat wire stator, comprising a stator core and a stator winding wound on the stator core, 48 stator slots are provided on the stator core at intervals, a plurality of wire layers are provided in each stator slot, each wire layer in each stator slot is arranged along the radial direction from inside to outside in turn, the stator winding is a three-phase winding, each phase winding comprises 4 parallel branches, each branch comprises a first outgoing end and a second outgoing end, the first outgoing end of each branch of the same phase winding is connected to different wire layers in the same stator slot, the second outgoing end of each branch of the same phase winding is connected to different wire layers in the same stator slot, and the first outgoing end and the second outgoing end are led out in different stator slots. Preferably, the 4 branches of each phase winding are alternately arranged in the corresponding winding along the circumferential direction to fill the stator slots.

[0008] Preferably, each of the branches in the three-phase winding includes a connecting wire wound on the stator core, and the two ends of the connecting wire are the first lead-out end and the second lead-out end corresponding to the winding. The connecting wire of each branch is wound around the first lead-out end and is wound in an S-shape in the corresponding stator slot.

[0009] Preferably, the connecting wire is wound in two adjacent stator slots, and a winding span of 5 stator slots is a first span, a winding span of 6 stator slots is a second span, and a winding span of 7 stator slots is a third span.

[0010] Preferably, starting from one of the stator slots, the stator slots are numbered in a counterclockwise direction from the 1st slot to the 48th slot, that is, the 48 stator slots are the 1st slot, the 2nd slot, the 3rd slot... the 47th slot, the 48th slot;

[0011] There are 8 wire layers, and the 8 wire layers in each stator slot are arranged as a, b, c, d, e, f, g and h wire layers in order from the inside to the outside in the radial direction;

[0012] The three-phase windings correspond to the U-phase winding, the V-phase winding and the W-phase winding respectively;

[0013] The first lead-out end of each branch in the U-phase winding corresponds to one end of the g, e, c, and a wire layers in the 27th slot, and the second lead-out end of each branch in the U-phase winding corresponds to one end of the h, f, d, and b wire layers in the 21st slot.

[0014] The first lead-out end of each branch in the V-phase winding corresponds to one end of the g, e, c, and a wire layers in the 31st slot, and the second lead-out end of each branch in the V-phase winding corresponds to one end of the h, f, d, and b wire layers in the 25th slot.

[0015] The first lead-out ends of each branch in the W-phase winding correspond to one end of the g, e, c, and a wire layers of the 35th slot, and the second lead-out ends of each branch in the W-phase winding correspond to one end of the h, f, d, and b wire layers of the 29th slot.

[0016] Preferably, the U-phase winding, the V-phase winding and the W-phase winding all have a positive terminal and a negative terminal, the neutral point connecting lines of the U-phase winding, the V-phase winding and the W-phase winding are connected to each other, and the neutral point connecting lines are welded together by the negative terminals.

[0017] Preferably, each of the first lead-out terminals, the second lead-out terminals, and each of the neutral point connecting lines are located on the same side of the iron core.

[0018] Preferably, each of the connecting wires is a conductive wire with an elliptical or square cross-section.

[0019] Preferably, it further comprises a wiring clamp, wherein the wiring clamp is provided with a wire insertion hole for plugging in the first lead-out end and the second lead-out end.

[0020] The utility model also provides a flat wire motor, comprising the flat wire stator as described above.

[0021] After adopting the above structure, the utility model has the following beneficial effects: the three-phase winding of the utility model adopts four branches, the first lead-out ends of each branch of each phase winding are connected to the same positioning groove, and each second lead-out end is connected to another positioning groove, that is, the four first lead-out ends of each phase winding are led out from the same positioning groove, and the four second lead-out ends are led out from the same positioning groove. In this way, the winding wiring is simple and clear, and the winding wiring is more regular after the wiring is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the expanded structure of the four branches of the U-phase winding in the present invention;

[0023] Figure 2 This is a schematic diagram of the synthetic expansion structure of the U-phase winding in the present utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a schematic diagram of the synthetic expansion structure of the V-phase winding in the present utility model;

[0026] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0027] Figure 6 Schematic diagram of the synthetic expansion structure of the W-phase winding in the present invention;

[0028] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0029] Figure 8 This is a schematic diagram of the synthetic expansion structure of the three-phase winding in the present utility model;

[0030] Figure 9 for Figure 8 Enlarged view of point D in the middle;

[0031] Figure 10 This is a schematic structural diagram of the flat wire stator in the utility model;

[0032] Figure 11 for Figure 10 Enlarged view of point E in the middle. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0034] like Figures 1 to 11 As shown:

[0035] A flat wire stator comprises a stator core and a stator winding wound on the stator core.

[0036] The inner wall of the stator core is evenly provided with 48 axially penetrating stator slots along the circumferential direction. The shape of the stator slots can be a conventional shape, such as a rectangular slot. Each stator slot is provided with an insulating unit, which is also the insulating unit used in the stator of a conventional motor. The insulating unit divides the corresponding stator slots into the first layer, the second layer, the third layer and the fourth layer from the outside to the inside in the radial direction of the stator core. Each layer is used to wind the stator winding, that is, each wire layer in the stator slot is filled with each phase winding.

[0037] In order to distinguish the stator slots at different positions, in this embodiment, starting from one of the stator slots, the stator slots are numbered in a counterclockwise direction from the 1st slot to the 48th slot, that is, the 48 stator slots are numbered as the 1st slot, the 2nd slot, the 3rd slot... the 47th slot, and the 48th slot.

[0038] The stator winding is a three-phase winding with 48 slots and 8 wires per slot. The three-phase windings are arranged in a clockwise or counterclockwise sequence from the starting point to the end: the U-phase winding, the V-phase winding, and the W-phase winding. The three-phase windings can be connected in either a star or delta configuration. Each phase winding is arranged in a plurality of stator slots along the circumference of the stator core. Each stator slot has several layers of wires, and the layers within each stator slot are arranged radially from the inside outward, with the inside referring to the direction closer to the stator core.

[0039] Specifically, each phase winding includes four first branches, second branches, third branches and fourth branches, which are connected in parallel and wound twice on the stator core respectively. The first branch, second branch, third branch and fourth branch of each phase winding are arranged alternately in the circumferential direction in each stator winding layer to fill the stator slots.

[0040] Each branch of each phase winding includes a first lead-out end and a second lead-out end. The first lead-out ends of each branch of the same-phase winding are respectively connected to different wire layers in the same stator slot, and the second lead-out ends of each branch of the same-phase winding are respectively connected to different wire layers in the same stator slot, wherein the first lead-out end and the second lead-out end are respectively arranged to be led out of different stator slots.

[0041] The stator slots are arranged with 8 wire layers in sequence from the inside to the outside in the radial direction of the stator core, where the inside refers to the direction close to the stator core.

[0042] For the convenience of description, the eight wire layers are arranged in sequence from the inside to the outside along the radial direction of the stator core as a, b, c, d, e, f, g and h wire layers.

[0043] Furthermore, in the aforementioned three-phase winding, each branch includes connecting wires wound around the stator core. The connecting wires of each branch are wound from the starting end and arranged in an S-shape within each stator slot. A winding span of five stator slots is defined as a first span, a winding span of six stator slots as a second span, and a winding span of seven stator slots as a third span. Within each branch, the connecting wires are connected sequentially by crossover wires in the order of their winding ends, requiring only a single tooth-crossing operation. This significantly reduces the time delay associated with the "tooth-crossing" operation and improves winding production efficiency. Fewer crossover wires also minimize interference with windings in other slots, reduce crossover and overlap at coil ends, and provide a more aesthetically pleasing slot arrangement, resulting in a higher slot fill rate. Separate the connecting wires of each branch of the U-phase winding in the opposite direction of torsion. The wires coming from the same slot are on the same side. The four wires on the same side are the positive ends of the four branches of the U-phase winding, and the other side is the negative end. Use lug 1 to weld the four branches together and lead them out, which is the U phase; similarly, separate and weld the V and W phases in the same way, and finally use lug 1 to weld all the negative ends together as the neutral point.

[0044] It should be noted that all connecting wires and cross-wires are wires commonly used in the field of motors, such as flat copper wires. Preferably, the flat copper wire used in this embodiment has a flat oval cross-section compared to conventional round copper wires. Flat copper wires are easy to install, have good stability, and are beneficial for improving the slot fill rate of the stator winding. By using wires with oval or square cross-sections, the slot fill rate of the motor stator is effectively increased, the material utilization rate of the stator is increased, and the copper loss of the motor is reduced to improve the efficiency of the motor. The end height of the motor winding coil can be effectively reduced, thereby saving the volume of the motor.

[0045] Furthermore, in the above-mentioned U-phase winding, the four parallel branches correspond to U1 branch, U2 branch, U3 branch and U4 branch respectively, the first lead end and the second lead end of the U1 branch correspond to U1+ and U1- respectively, the first lead end and the second lead end of the U2 branch correspond to U2+ and U2- respectively, the first lead end and the second lead end of the U3 branch correspond to U3+ and U3- respectively, and the first lead end and the second lead end of the U4 branch correspond to U4+ and U4- respectively.

[0046] like Figure 1-3 As shown, in the U1 branch of the U-phase winding, the starting end of the connecting wire (the first lead-out terminal U1+) is located at the g-wire layer of the 27th slot. The connecting wire of the g-wire layer of the 27th slot is wound counterclockwise for the second span and connected to the f-wire layer of the 33rd slot, until it is connected to the a-wire layer of the 15th slot. The connecting wire of the a-wire layer of the 15th slot is wound clockwise for the second span and connected to the a-wire layer of the 9th slot, until it is connected to the h-wire layer of the 15th slot. The connecting wire of the h-wire layer of the 15th slot is wound counterclockwise for the third span and connected to the h-wire layer of the 22nd slot. The connecting wire of the h wire layer in the 22nd slot is wound counterclockwise for the second span and connected to the g wire layer in the 28th slot, until it is connected to the a wire layer in the 16th slot; the connecting wire of the a wire layer in the 16th slot is wound clockwise for the second span and connected to the a wire layer in the 10th slot, until it is connected to the h wire layer in the 16th slot. The connecting wire of the h wire layer in the 16th slot is wound counterclockwise for the first span and connected to the h wire layer in the 21st slot, and the connecting wire is led out, which is the final winding end (the second lead-out end U1-); thus, the connecting wire winding of the U1 branch is realized.

[0047] In this embodiment, the first lead-out terminal U1+ is an end led out from the g-line layer of the 27th slot, and the second lead-out terminal U1- is an end led out from the h-line layer of the 21st slot.

[0048] In the U2 branch of the U-phase winding, the starting end of the connecting wire (the first lead-out terminal U2+) is located at the e-wire layer of the 27th slot. The connecting wire of the e-wire layer of the 27th slot is wound counterclockwise for the second span and connected to the d-wire layer of the 33rd slot, until it is connected to the a-wire layer of the 3rd slot. The connecting wire of the a-wire layer of the 3rd slot is wound clockwise for the second span and connected to the a-wire layer of the 45th slot, until it is connected to the h-wire layer of the 3rd slot. The connecting wire of the h-wire layer of the 3rd slot is wound counterclockwise for the third span and connected to the h-wire layer of the 10th slot. The connecting wire of the h-wire layer of the 10th slot is wound counterclockwise for the second span. Connect to the g-line layer of the 16th slot until it is connected to the a-line layer of the 4th slot; the connecting line of the a-line layer of the 4th slot is wound clockwise for the second span and connected to the a-line layer of the 46th slot, until it is connected to the h-line layer of the 4th slot; the connecting line of the h-line layer of the 4th slot is wound counterclockwise for the first span and connected to the h-line layer of the 9th slot, and the connecting line of the h-line layer of the 9th slot is wound counterclockwise for the second span and connected to the g-line layer of the 15th slot until it is connected to the f-line layer of the 21st slot, and the connecting line is led out, which is the final winding end (the second lead-out end U2-); thereby realizing the winding of the connecting line of the U2 branch.

[0049] In this embodiment, the first lead-out terminal U2+ is an end led out from the e-line layer of the 27th slot, and the second lead-out terminal U2- is an end led out from the f-line layer of the 21st slot.

[0050] In the U3 branch of the U-phase winding, the starting end of the connecting wire (the first lead-out terminal U3+) is located at the c-wire layer of the 27th slot. The connecting wire of the c-wire layer of the 27th slot is wound counterclockwise for the second span and connected to the b-wire layer of the 33rd slot, until it is connected to the a-wire layer of the 39th slot. The connecting wire of the a-wire layer of the 39th slot is wound clockwise for the second span and connected to the a-wire layer of the 33rd slot, until it is connected to the h-wire layer of the 39th slot. The connecting wire of the h-wire layer of the 39th slot is wound counterclockwise for the third span and connected to the h-wire layer of the 46th slot. The connecting wire of the h-wire layer of the 46th slot is wound counterclockwise for the second span. Connect to the g-line layer of the 4th slot until it is connected to the a-line layer of the 40th slot; the connecting line of the a-line layer of the 40th slot is wound clockwise for the second span and connected to the a-line layer of the 34th slot until it is connected to the h-line layer of the 40th slot; the connecting line of the h-line layer of the 40th slot is wound counterclockwise for the first span and connected to the h-line layer of the 45th slot, and the connecting line of the h-line layer of the 45th slot is wound counterclockwise for the second span and connected to the g-line layer of the 3rd slot until it is connected to the d-line layer of the 21st slot, and the connecting line is led out, which is the final winding end (the second lead-out end U3-); thereby realizing the winding of the connecting line of the U3 branch.

[0051] In this embodiment, the first lead-out terminal U3+ is an end led out from the c-line layer of the 27th slot, and the second lead-out terminal U3- is an end led out from the d-line layer of the 21st slot.

[0052] In the U4 branch of the U-phase winding, the starting end of the connecting wire (the first lead-out terminal U4+) is located at the a-wire layer of the 27th slot. The connecting wire of the a-wire layer of the 27th slot is wound clockwise for the second span and connected to the a-wire layer of the 21st slot, until it is connected to the h-wire layer of the 27th slot. The connecting wire of the h-wire layer of the 27th slot is wound counterclockwise for the third span and connected to the h-wire layer of the 34th slot. The connecting wire of the h-wire layer of the 34th slot is wound counterclockwise for the second span and connected to the g-wire layer of the 40th slot, until it is connected to the a-wire layer of the 28th slot. layer; the connecting wire of the a-line layer in the 28th slot is wound clockwise for the second span and connected to the a-line layer in the 22nd slot, until it is connected to the h-line layer in the 28th slot; the connecting wire of the h-line layer in the 28th slot is wound counterclockwise for the first span and connected to the h-line layer in the 33rd slot, and the connecting wire of the h-line layer in the 33rd slot is wound counterclockwise for the second span and connected to the g-line layer in the 39th slot, until it is connected to the b-line layer in the 21st slot; and the connecting wire is led out, which is the final winding end (the second lead-out end U4-); thereby realizing the winding of the connecting wire of the U4 branch.

[0053] In this embodiment, the first lead-out terminal U4+ is an end led out from the a-line layer of the 27th slot, and the second lead-out terminal U4- is an end led out from the b-line layer of the 21st slot.

[0054] like Figure 2 and Figure 3 As shown, in the U-phase winding, the first lead ends of the four branches correspond to U1+, U2+, U3+, and U4+, respectively, and the second lead ends of the four branches correspond to U1-, U2-, U3-, and U4-, respectively. U1+, U2+, U3+, and U4+ correspond to the ends of the g, e, c, and a wire layers of the 27th slot, respectively, and U1-, U2-, U3-, and U4- correspond to the ends of the h, f, d, and b wire layers of the 21st slot, respectively. The aforementioned U1-, U2-, U3-, and U4- collectively form U-, and the aforementioned U1+, U2+, U3+, and U4+ collectively form U+. That is, U- is the negative terminal of the U-phase winding, and U+ is the positive terminal of the U-phase winding.

[0055] Furthermore, the logic of the wiring connection method of each branch of the above-mentioned V-phase winding and W-phase winding is the same as the logic of the wiring connection of the U1 branch, U2 branch, U3 branch and U4 branch of the U-phase winding, so it will not be described in detail.

[0056] like Figure 4-5As shown, in the V-phase winding, the first lead-out terminals of the four branches correspond to V1+, V2+, V3+, and V4+, respectively, and the second lead-out terminals of the four branches correspond to V1-, V2-, V3-, and V4-, respectively. V1+, V2+, V3+, and V4+ correspond to the ends of the g, e, c, and a wire layers of the 31st slot, respectively, and V1-, V2-, V3-, and V4- correspond to the ends of the h, f, d, and b wire layers of the 25th slot, respectively. V1-, V2-, V3-, and V4- collectively form V-, and the aforementioned V1+, V2+, V3+, and V4+ collectively form V+. That is, V- is the negative terminal of the V-phase winding, and V+ is the positive terminal of the V-phase winding.

[0057] like Figure 6-7 As shown, in the W-phase winding, the first lead-out terminals of the four branches correspond to W1+, W2+, W3+, and W4+, respectively, and the second lead-out terminals of the four branches correspond to W1-, W2-, W3-, and W4-, respectively. W1+, W2+, W3+, and W4+ correspond to the leads from the g, e, c, and a wire layers of slot 35, respectively, and W1-, W2-, W3-, and W4- correspond to the leads from the h, f, d, and b wire layers of slot 29, respectively. W1-, W2-, W3-, and W4- collectively form W-, and W1+, W2+, W3+, and W4+ collectively form W+. That is, W- is the negative terminal of the W-phase winding, and W+ is the positive terminal of the W-phase winding.

[0058] The flat wire stator of this embodiment also includes a wiring clamp 1, which is provided with a wire insertion hole 11 for plugging in the terminal. The first lead-out end and the second lead-out end of each winding are respectively arranged on the wire insertion hole 11, and are welded to the wiring clamp 1. The coils formed by mutual welding are widely used in various types of automotive motor stators. It is not the focus of this embodiment and will not be described in detail here.

[0059] The terminal clamp 1 is made of insulating material, which can ensure that the first lead-out end and the second lead-out end of each winding are insulated from the outside.

[0060] The terminal clamp 1 in this embodiment has a bottom surface 12 and an inserting section 13 extending parallel to the bottom surface 12. Each wire insertion hole 11 is provided on the bottom surface 12. The inserting section 13 is used to secure the terminal clamp 1 to the stator. Specifically, the inserting section 13 is inserted between two adjacent sets of insulating sleeves on the stator, making the connection very convenient.

[0061] The connecting clip 1 in this embodiment is an integrated structure, which is easy to process and to mass produce.

[0062] Furthermore, the connecting clip 1 is made of plastic.

[0063] The application further provides a flat wire motor comprising the flat wire stator.

[0064] With the above structure, the flat wire stator has the advantages that in the four branches of each phase winding, the first leading-out end is led out from the same stator slot, and the second leading-out end is led out from the same stator slot, so that only two stator slots of each phase have leading-out ends, thereby simplifying wiring and making the wiring line neat.

[0065] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A flat wire stator, comprising a stator core and a stator winding wound on the stator core, wherein the stator core is provided with 48 stator slots spaced apart from each other, each of the stator slots having a plurality of wire layers, and the wire layers in each stator slot are arranged radially from the inside outward, the stator winding being a three-phase winding, characterized in that: Each phase of the winding includes four parallel branches, each branch includes a first lead-out end and a second lead-out end, the first lead-out end of each branch of the winding of the same phase is respectively connected to different wire layers in the same stator slot, and the second lead-out end of each branch of the winding of the same phase is respectively connected to different wire layers in the same stator slot, and the first lead-out end and the second lead-out end are respectively led out of different stator slots.

2. The flat wire stator according to claim 1, characterized in that: The four branches of the winding of each phase are alternately arranged along the circumferential direction in the corresponding winding to fill the stator slots.

3. The flat wire stator according to claim 1, characterized in that: Each branch of the three-phase winding includes a connecting wire wound on the stator core, and the two ends of the connecting wire are the first lead-out end and the second lead-out end corresponding to the winding. The connecting wire of each branch is wound around the first lead-out end and is wound in an S-shape in the corresponding stator slot.

4. The flat wire stator according to claim 3, characterized in that: The connecting wire is wound in two adjacent stator slots, and a winding span of 5 stator slots is a first span, a winding span of 6 stator slots is a second span, and a winding span of 7 stator slots is a third span.

5. The flat wire stator according to claim 4, characterized in that: Starting from one of the stator slots, the stator slots are numbered from the 1st slot to the 48th slot in a counterclockwise direction, that is, the 48 stator slots are the 1st slot, the 2nd slot, the 3rd slot... the 47th slot, the 48th slot; There are 8 wire layers, and the 8 wire layers in each stator slot are arranged as a, b, c, d, e, f, g and h wire layers in order from the inside to the outside in the radial direction; The three-phase windings correspond to the U-phase winding, the V-phase winding and the W-phase winding respectively; The first lead-out end of each branch in the U-phase winding corresponds to one end of the g, e, c, and a wire layers in the 27th slot, and the second lead-out end of each branch in the U-phase winding corresponds to one end of the h, f, d, and b wire layers in the 21st slot. The first lead-out end of each branch in the V-phase winding corresponds to one end of the g, e, c, and a wire layers in the 31st slot, and the second lead-out end of each branch in the V-phase winding corresponds to one end of the h, f, d, and b wire layers in the 25th slot. The first lead-out ends of each branch in the W-phase winding correspond to one end of the g, e, c, and a wire layers of the 35th slot, and the second lead-out ends of each branch in the W-phase winding correspond to one end of the h, f, d, and b wire layers of the 29th slot.

6. The flat wire stator according to claim 5, characterized in that: The U-phase winding, the V-phase winding and the W-phase winding all have a positive terminal and a negative terminal. The neutral point connecting lines of the U-phase winding, the V-phase winding and the W-phase winding are connected to each other, and the neutral point connecting lines are welded together by the negative terminals.

7. The flat wire stator according to claim 6, characterized in that: Each of the first lead-out terminals, the second lead-out terminals, and each of the neutral point connecting lines are located on the same side of the iron core.

8. The flat wire stator according to claim 3, characterized in that: Each of the connecting wires is a conductive wire with an elliptical or square cross section.

9. The flat wire stator according to claim 1, characterized in that: It also includes a wiring clamp, which is provided with a wire insertion hole for plugging the first lead-out end and the second lead-out end.

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

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