Flat wire stator and drive motor with such a stator

Abstract

This application discloses a flat-wire stator assembly and a drive motor relating to the technical field of drive motors. It comprises a stator iron core and a winding, wherein a through-hole is located in the stator iron core and several installation slots are arranged on the inner wall of the through-hole along its circumference. Each phase winding consists of at least three parts, the first, second, and third parts being distributed along the direction of the installation slot that points towards the bottom of the slot. The equivalent distance of the first part to the third part corresponds to the pole spacing, and the winding centerlines of the first and third parts are located on either side of the winding centerline of the second part. The centerline of the first and third parts of the winding is at least one installation slot away from the centerline of the second part of the winding.By dividing the winding in the installation slot into at least three parts and changing the centerline of different parts of the winding to alter the winding distribution, the harmonic of the winding counter-electromotive force can be reduced to optimize the torque ripple in both the high and low speed ranges.

Description

Technical field

[0001] This application relates to the technical field of the drive motor, in particular a flat wire stator arrangement and a drive motor. State of the art

[0002] As national requirements for vehicle emissions become increasingly stringent, particularly in the automotive sector, new energy vehicles will gradually replace traditional internal combustion engine vehicles. As key drive components in new energy vehicles, the performance of the drive motors directly impacts vehicle comfort, and the motor's torque pulsation directly affects the user's driving experience. Therefore, improving the drive motor's torque pulsation is crucial for enhancing overall vehicle comfort.

[0003] Flat wire motors are increasingly used in new energy vehicles due to their advantages, such as high full-slot rate, small size at the lower end, high thermal efficiency, and other aspects. However, existing flat wire motor stator assemblies are mostly spaced-wound. They typically consist of stator cores with installation slots that open around the core's circumference, and two adjacent installation slots forming stator teeth wound onto the core. In a spaced-winding structure, the equivalent distance between phase bands of the same phase winding at adjacent poles is equal to the distance between them. However, the spaced-winding structure can result in the drive motor exhibiting a higher anti-potential harmonic, which in turn leads to higher torque pulsation in the motor, negatively impacting the overall comfort of the vehicle.Currently, some manufacturers divide the motor's stator winding into two parts to reduce torque pulsation, with the centerlines of the two winding sections offset. This does lead to a reduction in torque pulsation. However, in practice, it has been shown that using this method with too many windings makes the optimization of torque pulsation less pronounced at low speeds.

[0004] Therefore, there is an urgent need for a flat wire stator assembly and a drive motor to optimize torque pulsation in both the high and low speed ranges. Summary of the invention

[0005] This application relates to a flat wire stator arrangement and a drive motor to solve the problem of non-optimized torque pulsation in both the high and low speed ranges.

[0006] To solve one or more of the above-mentioned technical problems, the following technical solutions are used in this application: Firstly, this application provides a flat-wire stator arrangement comprising: a stator core and windings, wherein the stator core is provided with an installation through-hole, the inner wall of the installation through-hole is provided with several installation slots around its circumference, each extending in the direction of the axis of the stator core, parts of the winding are embedded in the installation slots, parts of the winding are located outside the installation slots, and each of the installation slots has n layers of radially spaced slots;

[0007] The winding in each phase consists of at least three parts, wherein the first, second and third parts are distributed over n layers of the groove in the direction of the notch of the fastening groove, which points towards the bottom of the groove, wherein the first part has a number of layers, the number of layers of the second part is b, the number of layers of the third part is c, where a+b+c ≤ n and n is the integer;

[0008] The centerline of the winding in Part I and Part III is distributed symmetrically to the centerline of the winding in Part II, with the centerline of the winding in Part I and Part III being offset from the centerline of the winding in Part II by the number of installation slots, which corresponds to x.

[0009] Furthermore, the center line of the winding in Part I and Part III is distributed symmetrically to the center line of the winding in Part II, and the center line of the winding in Part I and Part III is offset from the center line of the winding in Part II by the number of installation slots equal to x.

[0010] Furthermore, 1 ≤ x ≤ 2.

[0011] Furthermore, n is even.

[0012] Furthermore, a, b and c are even numbers.

[0013] Furthermore, if the winding in question consists of three parts per phase, then a+b+c=n.

[0014] Furthermore, if n=8, then a=2, b=4, c=2 or a=4, b=2, c=2 or a=2, b=2, c=4.

[0015] Furthermore, the described installation slots are rectangular slots.

[0016] Furthermore, the number of slots of the installation slots is Q=2mpq, where p is the pole pair of the stator assembly and m is the number of phases of the stator assembly and q is the number of slots per phase per pole.

[0017] Furthermore, Q=54, p=3, m=3.

[0018] Furthermore, the winding has at least two phases, with insulation between adjacent two-layer winding structures belonging to different phases in the same installation slots.

[0019] Secondly, the application provides a drive motor comprising the following: rotor assembly, wherein the rotor assembly is arranged in the space formed by the inner wall of the through-hole.

[0020] Based on the specific embodiment provided in this application, the following technical effects are disclosed in this application: By dividing the windings in the mounting slots into at least three sections and at least one slot between the centerline of the windings of the first and third sections and the centerline of the windings of the second section, wherein the centerlines of the windings of the first and third sections are located on both sides of the centerline of the windings of the second section, i.e., the distribution of the winding is changed by changing the centerline of the winding in different parts, this leads to reduced harmonics of the winding back EMF in order to achieve optimal torque pulsation in both the high and low speed ranges. Description of the attached drawings Fig. The structural diagram of the stator assembly intended for this application; Fig. shows a top view of the stator assembly intended for this application; Fig. shows an enlarged view of A in Fig. ; Fig. an extended diagram of the U-phase windings provided for embodiment 1 of this application; Fig. the extended diagram of the three-phase winding provided for embodiment 1 of this application; Fig. shows a comparison of the embodiment of the application with the torque pulsation in the low-speed range of the existing technology; Fig. shows the comparison of torque pulsation in the high-speed range between the embodiment of this application and the existing technology; Fig. an enlarged diagram of the U-phase windings provided for embodiment 2 of this application; Fig. extended diagram of the three-phase winding for embodiment 2 of this application; Fig. an extended diagram of the U-phase windings provided for embodiment 3 of this application; Fig. the three-phase winding expansion diagram for embodiment 3 of this application.

[0021] Marking with image: 1, Stator core; 11, Mounting through hole; 12, Installation slot; 2, Windings. Designs

[0022] The number of motor poles P, i.e., the number of magnetic poles of the motor, is divided into N poles and S poles. Generally, an N pole and an S pole are referred to as a magnetic pole pair. That is, the logarithm p is 1, i.e., P = 2p; where the motor speed (n) and the logarithm (p) of the motor satisfy the condition n = 60f / p, where f is the mains frequency.

[0023] Currently, the industry requires the selection of different speed drive motors due to the demands placed on speed, performance, and other aspects of new energy vehicles. The typical speed of low-speed motors is 3000 to 6000 rpm, that of medium-speed motors is 6000 to 10000 rpm, and that of high-speed motors is over 10000 rpm.

[0024] The pole spacing refers to the area of ​​each pole along the inner circle of the motor stator core, i.e., the span of the adjacent N and S poles relative to the slot. The pole spacing τ can be expressed as the number of slots per pole: T = Z / 2p, where Z is the total number of slots on the stator core and p is the log pole.

[0025] The spacing is the distance between the top and bottom edges of a coil and is expressed in terms of y. In flat-wire motors, the equivalent spacing is often used to describe the combined effect of the wide range of U-lines that make up a winding, as there can be multiple spans. Even when the equivalent spacing is used as the winding spacing, it is the distance between the first and second phase bands of the same phase winding at adjacent poles.

[0026] Furthermore, common winding methods for stator windings include full-space windings, long-space windings, and short-space windings, where the pitch winding is specified with a pitch equal to the pitch of the underwinding, and the long-space winding is specified with a pitch smaller than the pitch of the underwinding.

[0027] When the motor is running, cutting the telescoping coil creates a back EMF that opposes the voltage applied to both ends of the motor. This back EMF is the algebraic sum of the potentials at the two coil edges. The round winding has an electrical angle of 180° between its two edges, while the short winding has an angle of less than 180° between its two edges. Therefore, the back EMF potential of the ramped winding is higher, resulting in a higher harmonic of the back EMF, which in turn leads to greater torque pulsation in the motor, affecting its power output.

[0028] As mentioned in the background technology, the windings of the stator assembly are generally divided into two parts, one of which has an equivalent spacing set to a short distance to achieve the effect of reducing torque pulsation. However, in actual use of the stator assembly, it was found that with a given number of winding layers and maintaining the "very short" setting, the optimization effect on torque pulsation in the low-speed range of the drive motor is not satisfactory. It is not possible to achieve optimal torque pulsation between the high and low-speed ranges.

[0029] In order to solve one or more of the above-mentioned technical problems of the existing technology, this application proposes a creative flat wire stator arrangement and a drive motor in which the distribution of the windings is changed to reduce the harmonics of the counter-magnetic field windings and thus achieve the effect of optimizing the torque pulsation in both the high and low speed ranges.

[0030] The flat wire stator arrangement of this application is described in detail below with reference to the attached diagram.

[0031] The stator assembly consists of a stator core 1 and a 3-phase winding, wherein the stator core 1 is cylindrical and provided with mounting through holes 11, as shown in Fig. The inner wall of the mounting through-hole 11 has several slots 12 around its circumference, each slot 12 extending along the axis of the stator core 1. The portion of the winding 2 is embedded in the mounting slot 12, which serves as a stop for the winding 2. The portion of the winding 2 is located outside the mounting slots 12, each mounting slot 12 having n layers of radially arranged grooves, where n ≥ 8.

[0032] See Fig. and Fig. . Fig. is an enlargement of A in Fig. The installation slot 12 can be subdivided by n slots in its own radial direction according to the actual requirements to facilitate winding and identification of the coil. Generally, the slot layer on the underside of the slot 12 is designated as layer 1 and the slot side of the slot 12 as layer n when n = 8, as in Fig. shown. Layers 1 to 8 are distributed from the underside of slot 12 to the side of the slot.

[0033] It is understood that the shape of the stator core 1 is cylindrical and is merely an illustrative and not a limiting statement, and that any shape of the stator core 1 can be used as stator core 1 in this application, provided that it does not contradict the idea of ​​the invention of this application.

[0034] In the embodiment of this application, the number of pole pairs p of the stator assembly is 3, the number of stator slots Q is 54, and the number of slots Q = 2mpq of the stator slot is 2mpq, where q is the number of slots per phase per pole and q is 3 per phase per pole according to the formula above. The pole spacing τ = Z / 2p = 9.

[0035] Furthermore, in the embodiment of this application, the number of phases m of the stator arrangement 3 is, and the visible stator winding 2 comprises the U-phase winding, V-phase windings, and W-phase windings. It is understood that the number of phases of a stator arrangement of 3 is only an example and not a limiting specification, and that any stator arrangement with any number of phases can be used as a flat-wire stator arrangement in this application, provided that it does not contradict the inventive concept of the application.

[0036] Each phase winding consists of at least three parts, the first, second, and third parts being distributed along the side of the mounting slot facing the bottom of the slot, and the equivalent spacing of the first to third parts corresponding to the pole spacing. The centerlines of the windings of the first and third parts are located on either side of the centerlines of the windings of the second part; the centerlines of the windings of the first and third parts are at least one slot away from the centerlines of the windings of the second part.

[0037] Ideally, the center line of the winding of the first and third part is symmetrically distributed to the center line of the winding of the second part, and the center line of the winding of the first and third part is offset by the number of slots x, 1 ≤ x ≤ 2, from the center line of the winding of the second part.

[0038] Ideally, the center line of the windings of both the first and third sections deviates by one slot 12 from the center line of the windings of the second section.

[0039] It should be noted that the circular winding refers to the equivalent distance between the bands of the same winding at adjacent poles, which corresponds to the distance. If the number of slots per phase q per pole is 3, the center line of the middle slot in the three consecutive stator slots occupied by the same phase winding at that pole is the center line of the winding.

[0040] Set the number of slots in the first part to a slots, the number of slots in the second part to b slots, and the number of slots in the third part to c slots, where a+b+c ≤ n.

[0041] If a, b, and c can all be even, a winding pole, when wound onto the corresponding mounting slot 12, occupies two layers. If at least one of a, b, and c is odd, this results in inconsistent torsional direction at the weld end of the wire leg of the adjacent winding poles during welding. This leads to problems such as torsion and welding complexity, and makes the winding structure more complex and difficult to achieve.

[0042] If a, b, and c are straight, the multiple winding coils can be arranged in the same way on the installation slots 12, so that the angle of the torsion head of winding 2 at the weld end is consistent. Conversely, the torsion alignment of the weld end is not consistent, leading to torsion and welding complexity and other problems, thus further simplifying the design of winding 2 and facilitating the construction.

[0043] The winding distribution diagram is typically used to show the distribution of the winding coils in the stator slots 11, with the row heading indicating the slot number and the column heading indicating the position. The bottom and sides of the slots are usually filled in the first and last rows of the diagram, respectively. To differentiate the arrangement of the position numbers and to separate the positions, the position numbers are added to the side of the column heading. Position 1 and position 2 are part of the same position if a position comprises both. Each individual cell is filled with a number and a plus or minus sign, for example, U+ or U-, where "+" indicates that current flows into the winding and "-" indicates that current flows out of the winding. Ideally, in the embodiment of this application, each phase winding consists of three parts, n = 8. Example 1

[0044] Set a to 2, b to 4 and c to 2.

[0045] Referring to Fig. shows Fig. The U-phase windings of the 6-pole 54-slot, corresponding to the first part from the slot side to the bottom of the slot. Part II, Part III, i.e., layer a, layer b, layer c, corresponding to a layer, consists of layer 7, layer 8, layer b consists of layer 3 to layer 6, and layer c consists of layer 1 and layer 2, consecutively numbered from 1 to 54 for the 54 installation slots of core 1. "U+" means that current flows into the U-phase windings, and "U-" means that current flows out of the U-phase windings.

[0046] As in Fig. As shown, there are nine installation slots for each of the adjacent U+ and U- parts a, b, c, etc. a, b, c signify part I, part II, part III. The equivalent spacing of the third part is 9 = τ, which means that the first part, the second part, and the third part are all round-spaced windings. The centerline of the winding of the first part differs from the centerline of the winding of the second part by one slot 12, the centerline of the winding of the third part differs from the centerline of the winding of the first part by one slot 12, and the centerlines of the windings of the first and third parts are located on either side of the centerline of the winding of the second part; more precisely, the centerline of the winding in the first part is located to the left of the centerline of the winding in the second part, and the centerline of the winding in the third part is located to the right of the centerline of the winding in the second part.The center line of the winding in the first part is two slots 12 away from the center line of the winding in the third part.

[0047] For illustration, part of layer a is laid out as follows: Slot 17, Slot 7 to Slot 26, Layer 8, Slot 18, Slot 7 to Slot 27, Layer 8, Slot 19, Layer 7 to Slot 28, Layer 8. Part of layer b is laid out as follows: Slot 18 Layer 3 to Slot 27 Layer 4, Slot 19 Layer 3 to Slot 28 Layer 4, Slot 20 Layer 3 to Slot 29 Layer 4, Slot 18 Layer 5 to Slot 27 Layer 6, Slot 19 Layer 5 to Slot 28 Layer 6, Slot 20 Layer 5 to Slot 29 Layer 6. Part of layer c is laid out as follows: Slot 19, Slot 1 to Slot 28, Layer 2, Slot 20, Slot 1 to Slot 29, Layer 2, Slot 21, Slot 1 to Slot 30, Position 2.

[0048] Fig. Figure 1 is an extended diagram of the three-phase winding for embodiment 1, corresponding to the first and second parts of the three-phase winding from the slot side to the bottom of the slot. The third part, a, b, c, is shown in the diagram. Accordingly, layer a consists of layer 7 and layer 8, and layer b consists of layer 3 to layer 6. Layer c consists of layer 1 and layer 2. The 54 stator slots 11 of the stator core 1 are consecutively numbered from 1 to 54, and "U+" indicates that current flows into the U-phase windings. "U-" indicates that current flows out of the U-phase winding, "V+" indicates that current flows into the V-phase winding, "V-" indicates that current flows out of the V-phase winding, "W+" indicates that current flows into the W-phase winding, and "W-" indicates that current flows out of the W-phase windings.

[0049] As in Fig. As shown, the V+ and V- adjacent to layers a, b, and c are each separated from each other by nine mounting slots, and between layers a, b, and c there are nine slots between the W+ and W- adjacent to layers b and c, which means that the equivalent distance for layers a, b, and c is 9 = τ, i.e., the first part. The equivalent distance for part two and part three is 9 = τ.

[0050] For example, the V-phase section of layer a is routed as follows: slot 20, slot 7 to slot 29, layer 8, slot 21, slot 7 to slot 30, layer 8, slot 22, layer 7 to slot 31, layer 8. The W-phase of layer a is routed as follows: slot 23, slot 7 to slot 32, layer 8, slot 24, slot 7 to slot 33, layer 8, slot 25, slot 7 to slot 34, layer 8. The V-phase portion of the b-slice is routed as follows: slot 21, slot 3 to slot 30, layer 4, slot 22, slots 3 to 31, layer 4, slot 23, slot 3 to slot 32, layer 4. Slot 21, Slot 5 to Slot 30, Level 6, Slot 22, Slot 5 to 31, Level 6, Slot 23, Slot 5 to Slot 31, Level 6.Part of the B phase is routed as follows: Slot 24, Level 3 to Slot 33, Level 4; Slot 25, Level 3 to Slot 34, Level 4; Slot 26, Level 3 to Slot 35, Level 4; Slot 24 Layer 5 to Slot 33 Layer 6, Slot 25 Layer 5 to Slot 34 Layer 6, Slot 26 Layer 5 to Slot 3, Level 6. The V-phase portion of the c-slice is routed as follows: Slot 22 Tier 1 to Slot 31 Tier 2, Slot 23 Tier 1 to Slot 32 Tier 2, Slot 24 Tier 1 to Slot 33 Tier 2. The W-phase portion of the c-layer is routed as follows: Slot 25, Slot 1 to Slot 34, Layer 2, Slot 26, Slot 1 to Slot 35, Layer 2, Slot 27, Slot 1 to Slot 36, Layer 2.

[0051] In combination with the in Fig. In the three-phase winding shown, all three parts of this embodiment have a well-spaced winding structure, and the distribution of winding 2 is modified by deviating the centerline of the winding in the first and third parts from the centerline of the winding in the second part. This, in turn, reduces the harmonics of the back EMF of windings 2 in order to optimize the torque pulsation.

[0052] For better comparability, the torque pulsation optimization effect of this embodiment is highlighted, and a pair of proportions is defined for comparison. The parameters for the scale are essentially the same as in embodiment 1, with the following differences: The centerlines of all winding layers are collinear, i.e., the equivalent slope for the proportional winding is an integer slope. Fig. is a comparison diagram of torque pulsation at low speed, Fig. is a comparison diagram of the torque pulsation at high speed, and the longitudinal parameter of the Fig. The percentage reduction in torque pulsation, in particular IMPLEMENTATION EXAMPLE 1, shows that compared to the ratio, IMPLEMENTATION 1 of this application exhibits approximately 1% lower torque pulsation in the low-speed range than the existing technology and approximately 17.5% lower torque pulsation in the high-speed range. This embodiment 1 combines optimization of torque pulsation in both the high- and low-speed ranges. Example 2

[0053] Set a to 4, b to 2 and c to 2.

[0054] Referring to Fig. is Fig. A 6-pole, 54-slot, flattened U-phase winding, corresponding to the first part from the slot edge to the slot bottom. Part II, Part III, i.e., layer a, layer b, the c-layer, corresponding to layer a, consists of layer 5 to layer 8, and layer b consists of layer 3. Layer 4, layer c consists of layer 1, layer 2, the 54 installation slots 12 of the iron core 1 are numbered from 1 to 54, "U+" means that current flows into the U-phase windings, and "U-" means that current flows out of the U-phase windings.

[0055] As in Fig. As shown, there are 9 slots between adjacent U+ and U- in parts a, b, c. This means a, b, c, i.e., part I, part II, and part II. The equivalent distance of the third part is 9 = τ, which means that the first part, the second part, and the third part are all round-spaced windings. The centerline of the winding of the first and third parts differs by one slot 12 from the centerline of the winding of the second part, and the centerlines of the windings of the first and third parts are symmetrically distributed with respect to the centerline of the winding of the second part; specifically, the centerline of the winding of the first part is to the left of the centerline of the winding of the second part. The centerline of the winding of the third part is to the right of the centerline of the winding of the second part; that is, the centerline of the winding of the first part is two slots 12 away from the centerline of the winding of the third part.

[0056] Instinctively, the layer is laid as follows: Slot 17 Level 5 to 26 Level 6, Slot 18 Level 5 to 27 Level 6, Slot 19 Level 5 to 28 Level 6; Slot 17, level 7 to 26, level 8; slot 18, level 7 to 27, level 8; slot 19, level 7 to 28, level 8. Part of b is routed as follows: slot 18, slot 3 to slot 27, layer 4; slot 19, slot 3 to slot 28, layer 4; slot 20, slot 3 to slot 29, layer 4. Part of level c is routed as follows: slot 19, slot 1 to slot 28, layer 2; slot 20, slot 1 to slot 29, layer 2; slot 21, slot 1 to slot 30, layer 2.

[0057] Fig. Figure 1 is an extended diagram of the three-phase winding for embodiment 2, corresponding to the first and second parts of the three-phase winding from the slot side to the bottom of the slot. The third part, a, b, c, is shown in the figure. Accordingly, layer a consists of layer 5 to layer 8, and layer b consists of layer 3 and layer 4. Layer c consists of layer 1 and layer 2. The 54 stator slots 11 of the stator core 1 are consecutively numbered from 1 to 54, and “U+” indicates that current flows into the U-phase windings. “U-” indicates that current flows from the U-phase winding, “V+” indicates that current flows into the V-phase winding, “V-” indicates that current flows from the V-phase winding, “W+” indicates that current flows into the W-phase winding, “W-” indicates that current flows from the W-phase windings.

[0058] As in Fig. As shown, V+ and V- differ by nine installation slots, in addition to layers a, b, and c. Between layers a, b, and c, there are nine slots between W+ and W-, meaning that the equivalent distance for layers a, b, and c is 9 = τ, i.e., the first part. The equivalent distance for parts two and three is 9 = τ.

[0059] Instinctively, the V-phase portion of layer a is routed as follows: slot 20 layer 5 to 29 layer 6, slot 21 layer 5 to 30 layer 6, slot 22 layer 5 to 31 layer 6; slot 20 layer 7 to 29 layer 8, slot 21 layer 7 to 30 layer 8, slot 22 layer 7 to slot 31 layer 8. The W-phase portion of layer a is routed as follows: slot 23 level 5 to slot 32 level 6, slot 24 level 5 to slot 33 level 6, slot 25 level 5 to slot 34 level 6; Slot 23, Level 7, to Slot 32, Level 8; Slot 24, Level 7, to Slot 33, Level 8; Slot 25, Level 7, to Slot 34, Level 8. The V-phase portion of the b-slice is routed as follows: Slot 21, Slot 3 to Slot 30, Layer 4; Slot 22, Slot 3 to Slot 31, Layer 4; Slot 23, Slot 3 to Slot 32, Layer 4.Part of the B-layer W-phase is routed as follows: Slot 24 Tier 3 to Slot 33 Tier 4, Slot 25 Tier 3 to Slot 34 Tier 4, Slot 26 Tier 3 to Slot 35 Tier 4. The V-phase portion of the c-slice is routed as follows: Slot 22 Tier 1 to Slot 31 Tier 2, Slot 23 Tier 1 to Slot 32 Tier 2, Slot 24 Tier 1 to Slot 33 Tier 2. Part of the C-layer W-phase is routed as follows: Slot 25, Slot 1 to Slot 34, Layer 2, Slot 26, Slot 1 to Slot 35, Layer 2, Slot 27, Slot 1 to Slot 36, Layer 2.

[0060] In combination with the in Fig. In the three-phase winding shown, the three parts of this embodiment have a well-spaced winding structure, and the distribution of winding 2 is modified by branching off the centerline of the winding in the first and third parts from the centerline of the winding in the second part. This, in turn, reduces the harmonics of the back EMF of windings 2 in order to optimize the torque pulsation. Implementation example 3

[0061] Set a to 2, b to 2 and c to 4.

[0062] Referring to Fig. shows Fig. The U-phase winding of the 6-pole 54-slot, corresponding to the first part from the slot side to the bottom of the slot. Part II, Part III, i.e., layer a, layer b, layer c, corresponding to a layer, consists of layer 7, layer 8, layer b consists of layer 5 (layer 5) layer 6 (layer 6), and layer c consists of layer 1 (layer 1) to layer 4 (layer 4), which are numbered sequentially from 1 to 54 for the 54 installation slots 12 of core 1. "U+" indicates that current flows into the U-phase windings, and "U-" indicates that current flows out of the U-phase windings.

[0063] As in Fig. As shown, there are nine installation slots for each of the adjacent parts a, b, c “U+” and “U-”. This means a, b, c, i.e., part I, part II, and the equivalent distance of the third part is 9 = τ, which means that the first part, the second part, and the third part are all round-spaced windings. The centerline of the winding of the first part differs from the centerline of the winding of the second part by one slot 12, the centerline of the winding of the third part differs from the centerline of the winding of the first part by one slot 12, and the centerlines of the windings of the first and third parts are located on either side of the centerline of the winding of the second part; more precisely, the centerline of the winding in the first part is located to the left of the centerline of the winding in the second part, and the centerline of the winding in the third part is located to the right of the centerline of the winding in the second part.The center line of the winding in the first part is two slots 12 away from the center line of the winding in the third part.

[0064] For illustration, the portion of layer a is routed as follows: Slot 17, Slot 7 to Slot 26, Layer 8, Slot 18, Slot 7 to Slot 27, Layer 8, Slot 19, Layer 7 to Slot 28, Layer 8. The portion of layer b is routed as follows: Slot 18, Slot 5 to Slot 27, Slot 19, Slot 5 to Slot 28, Layer 6, Slot 20, Slot 5 to Slot 29, Layer 6. The portion of layer c is routed as follows: Slot 19, Layer 1 to Slot 28, Layer 2; Slot 20, Layer 1 to Slot 29, Layer 2; Slot 21, Layer 1 to Slot 30, Layer 2; Slot 19, Level 3 to Slot 28, Level 4; Slot 20, Level 3 to Slot 29, Level 4; Slot 21, Level 3 to Slot 30, Layer 4.

[0065] Fig. Figure 1 is an extended diagram of the three-phase winding for embodiment 3, corresponding to the first and second parts of the three-phase winding from the slot side to the bottom of the slot. The third part, a, b, c, is shown in the diagram. Accordingly, layer a comprises layer 7, layer 8, and layer b comprises layer 5. Layer 6 (Layer 6), the c-layer consists of layer 1 (Layer 1) to layer 4 (Layer 4), the 54 stator slots 11 of the stator core 1 are consecutively numbered from 1 to 54, “U+” indicates that current flows into the U-phase windings, “U-” indicates that current flows out of the U-phase winding, “V+” indicates that current flows into the V-phase winding, “V-” indicates that current flows out of the V-phase winding, “W+” indicates that current flows into the W-phase winding, “W-” indicates that current flows out of the W-phase windings.

[0066] As in Fig. As shown, V+ and V- differ by nine slots next to layers a, b, and c, and there are nine slots between W+ and W- next to layers b and c, meaning that the equivalent distance for layers a, b, and c is 9 = τ, i.e., the first part. The equivalent distance for part two and part three is 9 = τ.

[0067] For example, the V-phase portion of layer a is routed as follows: Slot 20, Slot 7 to Slot 29, Layer 8; Slot 21, Slot 7 to Slot 30, Layer 8; Slot 22, Layer 7 to Slot 31, Layer 8. The W-phase of layer a is routed as follows: Slot 23, Slot 7 to Slot 32, Layer 8; Slot 24, Slot 7 to Slot 33, Layer 8; Slot 25, Slot 7 to Slot 34, Layer 8. The V-phase portion of the b-slice is routed as follows: Slot 21, Slot 5 to Slot 30, Layer 6; Slot 22, Slot 5 to Slot 31, Layer 6; Slot 23, Slot 5 to Slot 31, Layer 6. A portion of the B-layer W-phase is routed as follows: Slot 24, Tier 5 to Slot 33, Tier 6. Slot 25 Tier 5 to Slot 34 Tier 6, Slot 26 Tier 5 to Slot 35 Tier 6. The V-phase portion of the c-slice is routed as follows: Slot 22 Tier 1 to Slot 31 Tier 2, Slot 23 Tier 1 to Slot 32 Tier 2, Slot 24 Tier 1 to Slot 33 Tier 2; Slot 22 Tier 3 to Slot 31 Tier 4, Slot 23 Tier 3 to Slot 32 Tier 4, Slot 24 Tier 3 to Slot 33 Tier 4.The part of the c-layer W-phase is managed as follows: Slot 25, Slot 1 to Slot 34, Layer 2, Slot 26, Slot 1 to Slot 35, Layer 2, Slot 27, Slot 1 to Slot 36, Layer 2.

[0068] In combination with the in Fig. In the three-phase winding shown, all three parts of this embodiment have a well-spaced winding structure, and the distribution of winding 2 is modified by deviating the centerline of the winding in the first and third parts from the centerline of the winding in the second part. This, in turn, reduces the harmonics of the back EMF of windings 2 in order to optimize the torque pulsation.

[0069] This application embodiment also includes a drive motor, which may be a permanent magnet synchronous motor, an AC asynchronous motor, etc. The drive motor consists of the rotor and stator assembly of this application embodiment, located in a space formed around the inner wall of the mounting bore 11.

Claims

[1] Flat wire stator component, characterized by , that the stator component comprises a stator core and a winding, wherein the stator core is provided with an installation through-hole and the inner wall of the installation through-hole is provided with several installation slots along its circumference, each installation slot extending along the axial direction of the stator core, and part of the winding is embedded in the installation slots while part of the winding is located outside the installation slots, each installation slot having n radially spaced layers of slots; Each phase of the winding comprises at least three parts, with a first part, a second part, and a third part sequentially distributed along the direction of the installation slot, which points to the bottom of the slot on n slot layers. The first part has a layer a, the second part has a layer b, and the third part has a layer c, where a+b+c ≤ n and n is a positive integer. The equivalent distance of the first part to the third part corresponds to the pole spacing, and the winding centerlines of the first part and the third part are each located on either side of the winding centerline of the second part; the winding centerline of the first and third parts is at least one installation slot away from the winding centerline of the second part. [2] Flat wire stator component according to claim 1, characterized by, that the winding centerline of the first and third part is symmetrically distributed around the winding centerline of the second part and the number of installation slots in which the winding centerline of the first and third part is not aligned with the winding centerline of the second part is equal to x. [3] Flat wire stator component according to claim 2, characterized by , that 1 ≤ x ≤ 2. [4] Flat wire stator component according to claim 1, characterized by , that n is an even number. [5] Flat wire stator component according to claim 4, characterized by that a, b and c are all even numbers. [6] Flat wire stator component according to claim 1, characterized by , that if each phase of the winding consists of three parts, then a+b+c=n. [7] Flat wire stator component according to claim 6, characterized by , that if n=8, a=2, b=4, c=2 or a=4, b=2, c=2 or a=2, b=2, c=4. [8] Flat wire stator component according to claim 1, characterized bythat the installation slot is a rectangular slot. [9] Flat wire stator element according to claim 1, characterized by , that the number of slots in the installation slot is Q=2mpq, where p is the number of pole pairs of the stator element, m is the number of phases of the stator element and q is the number of slots per pole per phase. [10] Flat wire stator component according to claim 9, characterized by , that Q=54, p=3, m=3. [11] Flat wire stator component according to claim 1, characterized by that the winding has at least two phases and insulating elements are arranged between adjacent two winding structures belonging to different phases within the same installation slot. [12] Drive motor comprising one of the flat wire stator components claimed in claims 1 to 11, characterized by, that the drive motor includes a rotor component located in a space enclosed by the inner wall of the installation through-hole.

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