Flat wire motor and scooter

Abstract

The utility model discloses a flat wire motor and a scooter, flat wire motor includes stator core and stator winding, stator core includes at least 2 stator teeth of interval arrangement along its circumference direction, and the stator slot is limited between any adjacent 2 stator teeth, and the stator tooth is rectangular tooth, and the stator slot is sector slot. Stator winding includes at least two groups U shape line and at least two groups connecting line, and the group number of U shape line, the group number of connecting line and the number of stator tooth are equal and one -to -one correspondence, and each group U shape line sleeve joint corresponding stator tooth and are connected through corresponding group connecting line. The utility model provides flat wire motor has compact structure, small, and the advantage that the appearance is high in degree.

Description

Technical Field

[0001] This utility model relates to the field of mobility scooter technology, specifically to a flat wire motor and a mobility scooter. Background Technology

[0002] The stator core of the hub motor commonly used in mobility scooters is usually made into a single ring with stator slots on the outside, where multiple wires are wound. To improve the utilization rate of the stator slots, some hub motors use flat wires wound in the stator slots.

[0003] In related technologies, the stator windings typically span multiple teeth, meaning that after the winding extends from one stator slot, it crosses multiple teeth and inserts into another stator slot. However, this configuration usually results in the portion of the winding outside the stator slot occupying too much space to avoid interference with the other windings, thus making the axial dimension of the flat wire motor larger. When used as a hub motor, it suffers from the problems of large space occupation and low aesthetic appeal. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose a flat wire motor, which has the advantages of compact structure, small size, and high aesthetic appearance.

[0006] An embodiment of this utility model also proposes a mobility scooter.

[0007] The flat wire motor of this utility model embodiment includes a stator core and a stator winding. The stator core includes at least two stator teeth arranged at intervals along its circumference. A stator slot is defined between any two adjacent stator teeth. The stator teeth are rectangular teeth, and the stator slots are fan-shaped slots. The stator winding includes at least two sets of U-shaped wires and at least two sets of connecting wires. The number of sets of U-shaped wires, the number of sets of connecting wires, and the number of stator teeth are equal and correspond one-to-one. Each set of U-shaped wires is sleeved on the corresponding stator tooth and connected through the corresponding set of connecting wires.

[0008] According to an embodiment of the present invention, the flat wire motor includes at least two sets of U-shaped wires and at least two sets of connecting wires corresponding one-to-one with the stator teeth in its stator winding. Each set of U-shaped wires is sleeved around the corresponding stator tooth and connected by the corresponding set of connecting wires. That is, a portion of the stator winding crosses a stator tooth in the form of a U-shaped wire. When each set of U-shaped wires is connected by the corresponding set of connecting wires, the connecting wires do not need to avoid other U-shaped wires that are not connected to them in the axial direction of the stator core. All connecting wires can be positioned closer to the end face of the stator core, thereby effectively reducing the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and smaller volume. When used as a hub motor, it occupies less space in a mobility scooter, resulting in a more aesthetically pleasing appearance.

[0009] In some embodiments, at least two sets of the U-shaped wires are arranged sequentially along the circumference of the stator core;

[0010] And / or, each group of U-shaped lines includes at least two U-shaped lines arranged sequentially along the radial direction of the stator core, at least two U-shaped lines in each group of U-shaped lines cross the corresponding stator teeth, each group of connecting lines includes at least two connecting lines arranged sequentially along the radial direction of the stator core, two adjacent U-shaped lines in each group of U-shaped lines are connected by the connecting lines, and the two parts of the U-shaped lines inserted into two adjacent stator slots are arranged in a staggered manner along the circumference of the stator core.

[0011] In some embodiments, the U-shaped wire includes a first insertion segment, a first intermediate segment, and a second insertion segment connected in sequence. The first insertion segment and the second insertion segment are respectively inserted into two adjacent stator slots. The first insertion segment and the second insertion segment have the same size. The circumferential misalignment distance between the first insertion segment and the second insertion segment in each U-shaped wire along the stator core is greater than or equal to the maximum radial dimension of the first insertion segment in the stator core.

[0012] And / or, the outer contour of the connecting line is straight, and the length of at least two of the connecting lines in each group increases radially outward from the stator core.

[0013] In some embodiments, the portion of the first insertion segment located within the stator slot has the same cross-sectional size and shape at any position along its extension direction, wherein...

[0014] The portion of the first insertion section located within the stator slot has a circumferential dimension in the stator core that gradually increases radially outward from the stator core; alternatively, any position of the portion of the first insertion section located within the stator slot has a circumferential dimension that is equal to that of the stator core.

[0015] In some embodiments, both the first insertion segment and the second insertion segment extend axially along the stator core and partially protrude from the side of the stator core away from the first intermediate segment, and the connecting line is located on the side of the stator core away from the first intermediate segment.

[0016] In any two adjacent U-shaped lines in each group of U-shaped lines, the first insertion segment in one U-shaped line and the second insertion segment in the other U-shaped line are arranged circumferentially along the stator core and are welded to each other with the connecting line.

[0017] In some embodiments, in the same group of U-shaped lines, a plurality of first insertion segments protruding from the side of the stator core away from the first intermediate segment are arranged at radial intervals along the stator core, and a plurality of second insertion segments protruding from the side of the stator core away from the first intermediate segment are arranged at radial intervals along the stator core.

[0018] In some embodiments, the stator windings define a U-phase winding, a V-phase winding, and a W-phase winding, each of the U-phase winding, the V-phase winding, and the W-phase winding includes a plurality of phase windings arranged circumferentially along the stator core, each phase winding including at least two sets of U-shaped wires arranged adjacent to each other.

[0019] The stator winding also includes an interphase bridging line, and in each of the U-phase winding, the V-phase winding and the W-phase winding, two adjacent interphase windings are connected by the interphase bridging line.

[0020] In some embodiments, the phase-to-phase bridge line is U-shaped and includes a third insertion section, a second intermediate section and a fourth insertion section connected in sequence. The third insertion section and the fourth insertion section are arranged at intervals along the circumference of the stator core and are respectively inserted into different stator slots. The third insertion section is connected to the first insertion section through the connecting line, and the fourth insertion section is connected to the second insertion section through the connecting line.

[0021] In some embodiments, each of the phase windings further includes an inter-tooth bridging line, and two adjacent sets of U-shaped lines are connected by the inter-tooth bridging line.

[0022] In some embodiments, the inter-tooth bridging line is U-shaped and includes a fifth insertion segment, a third intermediate segment and a sixth insertion segment connected in sequence. The fifth insertion segment and the sixth insertion segment are arranged at intervals along the circumference of the stator core and are respectively inserted into two adjacent stator slots. One of the first insertion segment and the second insertion segment is located between the fifth insertion segment and the sixth insertion segment along the circumference of the stator core.

[0023] The mobility scooter according to an embodiment of the present invention includes a flat wire motor as described in any of the above embodiments.

[0024] The technical advantages of the mobility scooter according to the present invention are the same as those of the flat wire motor in the above embodiments, and will not be repeated here. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a flat wire motor according to an embodiment of the present utility model.

[0026] Figure 2 This is another schematic diagram of a flat wire motor according to an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the stator winding in a flat wire motor according to an embodiment of the present utility model.

[0028] Figure 4 This is a schematic diagram of a phase winding in a flat wire motor according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the U-shaped wire in the flat wire motor according to an embodiment of the present utility model.

[0030] Figure label:

[0031] 1. Stator core; 11. Stator slot; 12. Stator tooth; 2. Stator winding; 21. U-shaped wire; 211. First insertion section; 212. First intermediate section; 213. Second insertion section; 22. Connecting wire; 23. Phase-to-phase bridging wire; 24. Tooth-to-tooth bridging wire; 25. Phase-splitting winding. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] The following is combined with Figures 1-5 A flat wire motor according to an embodiment of the present utility model is described.

[0034] The flat wire motor of this utility model embodiment includes a stator core 1 and a stator winding 2. The stator core 1 includes at least two stator teeth 12 arranged at intervals along its circumference. A stator slot 11 is defined between any two adjacent stator teeth 12. The stator teeth 12 are rectangular teeth, and the stator slots 11 are fan-shaped slots. The width of the stator slots 11 gradually increases outward along the radial direction of the stator core 1. The stator winding 2 includes at least two sets of U-shaped wires 21 and at least two sets of connecting wires 22. The number of sets of U-shaped wires 21, the number of sets of connecting wires 22, and the number of stator teeth 12 are equal and correspond one-to-one. Each set of U-shaped wires 21 is sleeved on a corresponding stator tooth 12 and connected through a corresponding set of connecting wires 22.

[0035] According to an embodiment of the present invention, the flat wire motor includes at least two sets of U-shaped wires and at least two sets of connecting wires corresponding one-to-one with the stator teeth in its stator winding. Each set of U-shaped wires is sleeved around the corresponding stator tooth and connected by the corresponding set of connecting wires. That is, a portion of the stator winding crosses a stator tooth in the form of a U-shaped wire. When each set of U-shaped wires is connected by the corresponding set of connecting wires, the connecting wires do not need to avoid other U-shaped wires that are not connected to them in the axial direction of the stator core. All connecting wires can be positioned closer to the end face of the stator core, thereby effectively reducing the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and smaller volume. When used as a hub motor, it occupies less space in a mobility scooter, resulting in a more aesthetically pleasing appearance.

[0036] It should be noted that each group of U-shaped wires 21 includes at least two U-shaped wires 21 arranged sequentially along the radial direction of the stator core 1. At least two U-shaped wires 21 in each group of U-shaped wires 21 are sleeved on the corresponding stator teeth 12. Each group of connecting wires 22 includes at least two connecting wires 22 arranged sequentially along the radial direction of the stator core 1. Two adjacent U-shaped wires 21 in each group of U-shaped wires 21 are connected by connecting wires 22. The two parts of the U-shaped wires 21 inserted into the two adjacent stator slots 11 are arranged in a staggered manner along the circumference of the stator core 1.

[0037] For example, each group of U-shaped wires 21 includes four U-shaped wires 21. The portions of the four U-shaped wires 21 located in the same stator slot 11 are arranged sequentially along the radial direction of the stator core 1 and abut against each other in pairs. The insulating varnish on the outer surface of the U-shaped wires 21 ensures insulated contact between them. In addition, insulating paper is inserted into each stator slot 11 to separate the portion of the stator winding 2 located in the stator slot 11 from the stator core 1, so as to effectively prevent electrical connection between the stator winding 2 and the stator core 1. In the same group of U-shaped wires 21, the connection between two adjacent U-shaped wires 21 via the connecting wire 22 includes series and parallel connection. In this embodiment, two adjacent U-shaped wires 21 are connected in series via the connecting wire 22.

[0038] Optionally, such as Figure 3As shown, at least two sets of U-shaped wires 21 are arranged sequentially along the circumference of the stator core 1. That is, adjacent sets of U-shaped wires 21 do not intersect, and the portions of adjacent sets of U-shaped wires 21 inserted into the same stator slot 11 are arranged along the circumference of the stator core 1. In this case, along the radial direction of the stator core 1, each set of U-shaped wires 21 can include a larger number of U-shaped wires 21, thereby making the distribution of the stator windings 2 more uniform and improving the smoothness of motor operation. At the same time, this arrangement also ensures that the assembly of each set of U-shaped wires 21 on the stator core 1 does not interfere with each other, resulting in higher assembly efficiency.

[0039] In some embodiments, the U-shaped wire 21 includes a first insertion segment 211, a first intermediate segment 212, and a second insertion segment 213 connected in sequence. The first insertion segment 211 and the second insertion segment 213 are respectively inserted into two adjacent stator slots 11. The first insertion segment 211 and the second insertion segment 213 have the same size. The circumferential misalignment distance of the first insertion segment 211 and the second insertion segment 213 in each U-shaped wire 21 is greater than or equal to the maximum radial dimension of the first insertion segment 211 in the stator core 1.

[0040] That is, the first insertion segment 211 and the second insertion segment 213 in the U-shaped wire 21 differ from each other by at least one body length along the radial direction of the stator core 1. This arrangement allows the first insertion segment 211 in one U-shaped wire 21 and the second insertion segment 213 in the adjacent U-shaped wire 21 to be arranged circumferentially along the stator core 1. In this case, the structure of the connecting wire 22 connecting the two can be designed to be simpler and the cost lower. On the other hand, it also facilitates the formation of space in the stator slot 11 for the insertion of other windings (such as windings used to connect two adjacent sets of U-shaped wires 21), thereby further improving the utilization rate of the stator slot 11 and further improving the power and efficiency of the motor.

[0041] For example, such as Figure 3 and Figure 4 As shown, in each stator slot 11, in addition to the four first insertion segments 211 and four second insertion segments 213 inserted, a space for inserting two winding segments is also formed in the stator slot 11. One winding segment and one first insertion segment 211 are arranged along the circumference of the stator core 1, and the other winding segment and one second insertion segment 213 are arranged along the circumference of the stator core 1.

[0042] In some embodiments, the outer contour of the connecting wire 22 is straight, and the length of at least two connecting wires 22 in each group of connecting wires 22 increases outward along the radial direction of the stator core 1. At this time, the length of each connecting wire 22 in each group of connecting wires 22 can match the width of the stator teeth 12 at different positions in the radial direction of the stator core 1, so as to ensure that the first insertion segment 211 and the second insertion segment 213 of each U-shaped wire 21 in each group of U-shaped wires 21 abut against the opposite sides of the stator teeth 12 along the circumferential direction of the stator core 1, and the stator winding 2 is more tightly filled in the stator slot 11.

[0043] It should be noted that the outer contour of the connecting line 22 can also be V-shaped or U-shaped. In this case, when the first insertion segment 211 and the second insertion segment 213 connected by the connecting line 22 move away from each other due to external environmental interference, the connecting line 22 can be stretched and deformed so that the distance between its two ends in the circumferential direction of the stator core 1 can be adjusted, thereby effectively ensuring the reliability of the connection between the connecting line 22 and the U-shaped line 21, and making the flat wire motor more reliable.

[0044] For example, when the outer contour of the connecting line 22 is V-shaped or U-shaped, the openings of the defined V-shaped groove and U-shaped groove are set upwards.

[0045] In some embodiments, the portion of the first insertion segment 211 located within the stator slot 11 has the same cross-sectional size and shape at any position in its extension direction, wherein the circumferential dimension of the portion of the first insertion segment 211 located within the stator slot 11 gradually increases radially outward from the stator core 1.

[0046] With the number of first insertion segments 211 and second insertion segments 213 accommodating each stator slot 11 being equal, the above arrangement enables the first insertion segments 211 and second insertion segments 213 to fill the stator slot 11 along the circumferential dimension of the stator core 1, thereby effectively improving the utilization rate of the stator slot 11 and effectively improving the power and efficiency of the flat wire motor.

[0047] For example, the first insertion segment 211 and the second insertion segment 213, which are arranged circumferentially along the stator core 1 in the same stator slot 11, are in close contact with each other, and their opposite sides are in close contact with the opposite sides of the stator slot 11 along the circumferential direction of the stator core 1.

[0048] Alternatively, the circumferential dimensions of any position of the first insertion segment 211 located within the stator slot 11 are equal in the stator core 1. In this case, all U-shaped wires 21 have the same size, and the manufacturing difficulty and cost of the U-shaped wires 21 are low.

[0049] In some embodiments, the first insertion segment 211 and the second insertion segment 213 both extend axially along the stator core 1 and partially protrude from the side of the stator core 1 away from the first intermediate segment 212, and the connecting line 22 is located on the side of the stator core 1 away from the first intermediate segment 212. In any two adjacent U-shaped lines 21 of each group of U-shaped lines 21, the first insertion segment 211 in one U-shaped line 21 and the second insertion segment 213 in the other U-shaped line 21 are arranged circumferentially along the stator core 1 and are welded to each other with a connecting line 22.

[0050] The connecting wire 22 is welded between the first insertion section 211 and the second insertion section 213, which are adjacent and spaced apart along the circumference of the stator core 1. This achieves the connection of the two U-shaped wires 21, while also effectively preventing the connecting wire 22 from being too far away from the stator core 1 and increasing the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and a smaller size.

[0051] For example, such as Figures 1-3 As shown, the connecting line 22 is completely hidden between the first insertion section 211 and the second insertion section 213, that is, the entire connecting line 22 is located on the side of the movable end face of the first insertion section 211 facing the stator core 1. In other words, taking the connecting line 22 as a long strip flat wire as an example, the thickness of the connecting line 22 is less than or equal to the length of the portion of the first insertion section 211 and the second insertion section 213 that protrudes from the stator slot 11.

[0052] In some embodiments, in the same group of U-shaped lines 21, a plurality of first insertion segments 211 protruding from the side of the stator core 1 away from the first intermediate segment 212 are arranged at radial intervals along the stator core 1, and a plurality of second insertion segments 213 protruding from the side of the stator core 1 away from the first intermediate segment 212 are arranged at radial intervals along the stator core 1.

[0053] This effectively avoids direct contact between the parts of two adjacent first insertion sections 211 protruding from the stator core 1 in the same group of U-shaped wires 21, thus preventing an increase in the risk of electrical connection. It also effectively avoids direct contact between the parts of two adjacent second insertion sections 213 protruding from the stator core 1 in the same group of U-shaped wires 21, thus preventing an increase in the risk of electrical connection. The circuit formed by the stator winding 2 has higher reliability.

[0054] For example, such as Figure 5 As shown, the portion of each of the first insertion segment 211 and the second insertion segment 213 that protrudes from the side of the stator core 1 away from the first intermediate segment 212 is thinned on both sides of the stator core 1 in the radial direction, so that the radial dimension of this portion of the stator core 1 is smaller than the radial dimension of the portion of each of the first insertion segment 211 and the second insertion segment 213 located in the stator slot 11.

[0055] In some embodiments, the flat wire motor further includes a partition plate disposed on the side of the stator core 1 away from the first intermediate section 212. The partition plate forms a plurality of limiting grooves for the connecting wires 22 to cooperate with. The partition plate separates any two adjacent connecting wires 22 arranged radially along the stator core 1.

[0056] This effectively avoids the two connecting wires 22 from coming into contact with each other, thus reducing the electrical connection efficiency between the two and further ensuring the working performance of the flat wire motor.

[0057] For example, the partition corresponds one-to-one with the stator teeth 12. The surface of the partition away from the stator core 1 is provided with five limiting grooves. The five limiting grooves are arranged at intervals along the radial direction of the stator core 1. Each limiting groove is used to mate with a connecting wire 22.

[0058] In some embodiments, the stator winding 2 defines a U-phase winding, a V-phase winding, and a W-phase winding. Each of the U-phase winding, V-phase winding, and W-phase winding includes a plurality of phase-splitting windings 25 arranged circumferentially along the stator core 1. Each phase-splitting winding 25 includes at least two sets of adjacent U-shaped wires 21. The stator winding 2 also includes an interphase bridging wire 23. In each of the U-phase winding, V-phase winding, and W-phase winding, two adjacent phase-splitting windings 25 are connected by the interphase bridging wire 23.

[0059] This means that each of the U-phase, V-phase, and W-phase windings is split into multiple phase windings 25 arranged circumferentially along the stator core 1, which can effectively improve the magnetic field distribution, reduce harmonic content, and also effectively improve motor efficiency and power density.

[0060] Taking the U-phase winding as an example, it includes four phase windings 25. Each phase winding 25 includes four sets of U-shaped wires 21 and three inter-tooth bridging wires 24 for connecting the four sets of U-shaped wires 21 in series. The four phase windings 25 are connected in series through three inter-phase bridging wires 23. The two phase windings 25 located at the edge form U-terminals.

[0061] It should be noted that, taking the stator winding 2 in stator slot 11 arranged in five layers along the radial direction of stator core 1 as an example, two U terminals are set in the first layer of stator slot 11, two V terminals are set in the third layer of stator slot 11, and two W terminals are set in the fifth layer of stator slot 11. One U terminal, one V terminal and one W terminal can be connected to each other to form a star connection. Alternatively, one U terminal can be connected to one V terminal to form a U phase line, another V terminal can be connected to one W terminal to form a V phase line, and another W terminal can be connected to another U terminal to form a W phase line, i.e., a delta connection is formed.

[0062] For example, taking a stator with 48 teeth 12, the U-shaped wires 21 on teeth 1-4 can be connected to form the first phase winding 25 of the U phase, the U-shaped wires 21 on teeth 13-16 can be connected to form the second phase winding 25 of the U phase, the U-shaped wires 21 on teeth 25-28 can be connected to form the third phase winding 25 of the U phase, and the U-shaped wires 21 on teeth 37-40 can be connected to form the fourth phase winding 25 of the U phase.

[0063] The U-shaped wire 21 on teeth 5-8 is connected to the first phase winding 25 of phase V; the U-shaped wire 21 on teeth 17-20 is connected to the second phase winding 25 of phase V; the U-shaped wire 21 on teeth 29-32 is connected to the third phase winding 25 of phase V; and the U-shaped wire 21 on teeth 41-44 is connected to the fourth phase winding 25 of phase V.

[0064] The U-shaped wire 21 on teeth 9-12 is connected to the first phase winding 25 of phase W; the U-shaped wire 21 on teeth 21-24 is connected to the second phase winding 25 of phase W; the U-shaped wire 21 on teeth 33-36 is connected to the third phase winding 25 of phase W; and the U-shaped wire 21 on teeth 45-48 is connected to the fourth phase winding 25 of phase W.

[0065] The wire ends of the first, fifth, and ninth teeth form the motor UVW wires and are connected to the motor controller.

[0066] Alternatively, in at least two of the phase windings 25 of each of the U-phase winding, V-phase winding and W-phase winding, two adjacent phase windings 25 may also be connected in parallel or in series-parallel via phase-to-phase bridging lines 23.

[0067] In addition, each of the U-phase winding, V-phase winding and W-phase winding may include only one phase winding 25, and each phase winding 25 may include only one set of U-shaped wires 21.

[0068] In some embodiments, the phase-to-phase bridge line 23 is U-shaped and includes a third insertion section, a second intermediate section and a fourth insertion section connected in sequence. The third insertion section and the fourth insertion section are arranged at intervals along the circumference of the stator core 1 and are respectively inserted into different stator slots 11. The third insertion section is connected to the first insertion section 211 through the connecting line 22, and the fourth insertion section is connected to the second insertion section 213 through the connecting line 22.

[0069] The third and fourth insertion segments are inserted into the space left by the misalignment of the first insertion segment 211 and the second insertion segment 213 in the stator slot 11. This further improves the utilization rate of the stator slot 11 and also facilitates the connection of the third insertion segment to the first insertion segment 211 via the connecting line 22, and the connection of the fourth insertion segment to the second insertion segment 213 via the connecting line 22. At this time, the distribution of at least two connecting lines 22 on the side of the stator core 1 away from the first intermediate layer is uniform and regular, and the assembly efficiency of the stator winding 2 is high.

[0070] like Figure 3 As shown, the U-phase winding, V-phase winding, and the phase-to-phase bridging line 23 in the U-phase winding are located in the first, third, and fifth layers of the stator slot 11, respectively. The three do not interfere with each other in the radial direction of the stator core 1 and can be arranged on the same horizontal plane, thereby further reducing the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and a smaller volume.

[0071] In some embodiments, such as Figure 2 and Figure 3 As shown, the second intermediate section and the first intermediate section 212 are located on the same side of the stator core 1. This effectively prevents the phase-to-phase bridge wire 23 from encroaching on the radial space of the stator core 1, and effectively reduces the radial dimension of the flat wire motor.

[0072] Optionally, the second intermediate section is located on the inner circumference of the stator core 1, or the second intermediate section is located on the outer circumference of the stator core 1. This further reduces the axial dimension of the flat wire motor, which occupies less axial space on the motor shaft when used as a hub motor, resulting in a more aesthetically pleasing appearance for the vehicle.

[0073] It should be noted that the second intermediate section of the phase-to-phase bridge line 23 located in the first layer can also be located on the inner circumference of the stator core 1, the second intermediate section of the phase-to-phase bridge line 23 located in the third layer can be located on the axial side of the stator core 1, and the second intermediate section of the phase-to-phase bridge line 23 located in the fifth layer can be located on the outer circumference of the stator core 1.

[0074] In some embodiments, each phase winding 25 further includes an inter-tooth bridging line 24, through which adjacent sets of U-shaped lines 21 are connected. This eliminates the need to bend parts of the U-shaped lines 21 to achieve the connection between adjacent U-shaped lines 21, resulting in higher assembly efficiency for the stator winding 2.

[0075] For example, in each phase winding 25, two adjacent sets of U-shaped wires 21 are connected in series through inter-tooth bridging wires 24.

[0076] In some embodiments, the inter-tooth bridge line 24 is U-shaped and includes a fifth insertion section, a third intermediate section and a sixth insertion section connected in sequence. The fifth insertion section and the sixth insertion section are arranged at intervals along the circumference of the stator core 1 and are respectively inserted into two adjacent stator slots 11. One of the first insertion section 211 and the second insertion section 213 is located between the fifth insertion section and the sixth insertion section along the circumference of the stator core 1.

[0077] The fifth and sixth insertion segments are inserted into the space left by the misalignment of the first insertion segment 211 and the second insertion segment 213 in the stator slot 11. This further improves the utilization rate of the stator slot 11 and also facilitates the connection of the fifth insertion segment to the first insertion segment 211 via the connecting line 22, and the connection of the sixth insertion segment to the second insertion segment 213 via the connecting line 22. At this time, the multiple connecting lines 22 on the side of the stator core 1 away from the first intermediate layer are evenly and regularly distributed, and the assembly efficiency of the stator winding 2 is high.

[0078] For example, such as Figure 1 As shown, each group of connecting lines 22 includes five connecting lines 22, which are arranged radially at intervals along the stator core 1. Three connecting lines 22 are used to connect four U-shaped lines 21 in the same group. The fourth connecting line 22 connects the U-shaped line 21 with the inter-tooth bridging line 24. The fifth connecting line 22 either connects the U-shaped line 21 with the inter-tooth bridging line 24 or connects the U-shaped line 21 with the inter-phase bridging line 23.

[0079] The mobility scooter according to embodiments of the present invention includes a flat wire motor as described in any of the above embodiments.

[0080] The technical advantages of the mobility scooter according to the present invention are the same as those of the flat wire motor in the above embodiments, and will not be repeated here.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0083] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0084] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0085] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A flat wire motor, characterized in that, include: Stator core (1), the stator core (1) includes at least 2 stator teeth (12), and a stator slot (11) is defined between any two adjacent stator teeth (12). The stator teeth (12) are rectangular teeth, and the stator slot (11) is a fan-shaped slot. The stator winding (2) includes at least two sets of U-shaped wires (21) and at least two sets of connecting wires (22). The number of sets of U-shaped wires (21), the number of sets of connecting wires (22) and the number of stator teeth (12) are equal and correspond one-to-one. Each set of U-shaped wires (21) is sleeved on the corresponding stator teeth (12) and connected through the corresponding set of connecting wires (22).

2. The flat wire motor according to claim 1, characterized in that, At least two sets of the U-shaped wires (21) are arranged sequentially along the circumference of the stator core (1); Each group of U-shaped lines (21) includes at least two U-shaped lines (21) arranged sequentially along the radial direction of the stator core (1). At least two U-shaped lines (21) in each group are sleeved on the corresponding stator teeth (12). Each group of connecting lines (22) includes at least two connecting lines (22) arranged sequentially along the radial direction of the stator core (1). Two adjacent U-shaped lines (21) in each group are connected by the connecting lines (22). The two parts of the U-shaped lines (21) inserted into two adjacent stator slots (11) are arranged in a staggered manner along the circumference of the stator core (1).

3. The flat wire motor according to claim 2, characterized in that, The U-shaped line (21) includes a first insertion segment (211), a first intermediate segment (212), and a second insertion segment (213) connected in sequence. The first insertion segment (211) and the second insertion segment (213) are respectively inserted into two adjacent stator slots (11). The first insertion segment (211) and the second insertion segment (213) are the same size. The circumferential misalignment distance of the first insertion segment (211) and the second insertion segment (213) in each U-shaped line (21) along the stator core (1) is greater than or equal to the maximum radial dimension of the first insertion segment (211) in the stator core (1). And / or, the outer contour of the connecting line (22) is in the shape of a straight line, and the length of at least two of the connecting lines (22) in each group increases outward along the radial direction of the stator core (1).

4. The flat wire motor according to claim 3, characterized in that, The portion of the first insertion segment (211) located within the stator slot (11) has the same cross-sectional size and shape at any position in its extending direction, wherein, The portion of the first insertion segment (211) located in the stator slot (11) has a circumferential dimension in the stator core (1) that gradually increases radially outward from the stator core (1), or the portion of the first insertion segment (211) located in the stator slot (11) has a circumferential dimension in the stator core (1) that is at any position.

5. The flat wire motor according to claim 3 or 4, characterized in that, The first insertion segment (211) and the second insertion segment (213) both extend along the axial direction of the stator core (1) and partially protrude from the side of the stator core (1) away from the first intermediate segment (212). The connecting line (22) is located on the side of the stator core (1) away from the first intermediate segment (212). In any two adjacent U-shaped lines (21) of each group of U-shaped lines (21), the first insertion segment (211) in one U-shaped line (21) and the second insertion segment (213) in the other U-shaped line (21) are arranged circumferentially along the stator core (1) and the connecting line (22) is welded to each other.

6. The flat wire motor according to claim 5, characterized in that, In the same group of U-shaped lines (21), a plurality of first insertion segments (211) protruding from the side of the stator core (1) away from the first intermediate segment (212) are arranged radially at intervals along the stator core (1), and a plurality of second insertion segments (213) protruding from the side of the stator core (1) away from the first intermediate segment (212) are arranged radially at intervals along the stator core (1).

7. The flat wire motor according to claim 6, characterized in that, The stator winding (2) defines a U-phase winding, a V-phase winding and a W-phase winding, each of the U-phase winding, the V-phase winding and the W-phase winding includes a plurality of phase windings (25) arranged circumferentially along the stator core (1), each phase winding (25) including at least two sets of U-shaped wires (21) arranged adjacent to each other; The stator winding (2) further includes an interphase bridging line (23), and among the multiple phase windings (25) of each of the U-phase winding, the V-phase winding and the W-phase winding, two adjacent phase windings (25) are connected by the interphase bridging line (23).

8. The flat wire motor according to claim 7, characterized in that, The phase-to-phase bridge line (23) is U-shaped and includes a third insertion section, a second intermediate section and a fourth insertion section connected in sequence. The third insertion section and the fourth insertion section are arranged at intervals along the circumference of the stator core (1) and are respectively inserted into different stator slots (11). The third insertion section is connected to the first insertion section (211) through the connecting line (22), and the fourth insertion section is connected to the second insertion section (213) through the connecting line (22).

9. The flat wire motor according to claim 7 or 8, characterized in that, Each of the phase windings (25) also includes an inter-tooth bridging line (24), and two adjacent sets of U-shaped lines (21) are connected by the inter-tooth bridging line (24).

10. The flat wire motor according to claim 9, characterized in that, The inter-tooth bridging line (24) is U-shaped and includes a fifth insertion section, a third intermediate section and a sixth insertion section connected in sequence. The fifth insertion section and the sixth insertion section are arranged at intervals along the circumference of the stator core (1) and are respectively inserted into two adjacent stator slots (11). One of the first insertion section (211) and the second insertion section (213) is located between the fifth insertion section and the sixth insertion section along the circumference of the stator core (1).

11. A mobility scooter, characterized in that, Including the flat wire motor according to any one of claims 1-10.

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