A 72-slot 6-pole hairpin-shaped flat wire armature winding and motor

Abstract

The present invention provides a 72-slot 6-pole hairpin-type flat wire armature winding and a motor. The above-mentioned winding is obtained by using three-phase parallel flat wires of U-phase, V-phase and W-phase and cooperating with hairpins to wind around a ring-shaped stator with n layers and 72 stator slot positions inside. The U-phase winding includes two parallel branches. The first branch and the second branch are respectively formed by the flat wire starting from the first starting point and the second starting point at the nth layer and cooperating with the hairpin to successively wind around in a circumferential spiral reciprocating manner along the direction of n-1 to the 1st layer, and then reversely wind around in a circumferential spiral reciprocating manner along the direction of n+1 from the 1st layer to the nth layer, and a loop circuit is constructed at the first end point and the second end point at the nth layer after reciprocating winding between the nth layer and the 1st layer. The V-phase and W-phase windings are respectively obtained by rotating the U-phase winding 8 and 16 slot positions along the direction of increasing slot positions. This winding is beneficial to improving the slot fill factor of the motor, generating a higher magnetic field intensity, increasing the motor power, balancing the electromotive force of each branch, and there is no circulating current problem.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a 72-slot 6-pole hairpin flat wire armature winding and a motor. Background Art

[0002] Compared with traditional round wire motors, flat wire motors have higher slot fill factors and power densities. This is because flat wire motors use flat rectangular wires instead of round wires, enabling stator slots of the same area to accommodate wires with a larger area. This design not only improves the current conduction efficiency, reduces resistance losses, but also enhances the magnetic field strength, thereby improving the power of the motor and the vehicle power.

[0003] Flat wire motors have been widely used in new energy vehicle drive systems because they can significantly improve the slot fill factor and motor efficiency of motors. However, the traditional connection method of flat wire stator windings has obvious limitations. Especially in the high-speed operation state, due to the influence of the skin effect and proximity effect, the distribution of current on the cross-section of the flat copper wire becomes non-uniform, resulting in differences in the resistance of each winding path. This resistance imbalance further causes uneven distribution of current in each winding path, thereby generating a large additional copper loss, which not only reduces the motor efficiency but also weakens the continuous performance of the motor during high-speed operation.

[0004] Among them, the skin effect and proximity effect are the main reasons for the uneven distribution of current in conductors at high speeds. The skin effect causes the current to tend to flow on the surface of the conductor, while the proximity effect makes the current distributions in adjacent conductors affect each other; the combined action of these two effects makes the current distribution on the cross-section of the flat copper wire non-uniform, thereby causing resistance differences and current imbalance problems.

[0005] Therefore, although flat wire motors have significant advantages in terms of efficiency, power density, and heat dissipation performance, the traditional winding connection method limits their performance at high speeds. To solve this problem, the present invention proposes an innovative stator winding method that can effectively achieve complete balance of the current in each parallel branch, thereby improving the efficiency and performance of the flat wire motor. Summary of the Invention

[0006] Based on the above description, the present invention provides a 72-slot 6-pole hairpin flat wire armature winding and a motor, which solve the technical problem that the current flowing through each winding path of the existing flat wire stator winding is unbalanced, affecting the motor efficiency and performance.

[0007] The technical solution of the present invention to solve the above technical problems is as follows:

[0008] In a first aspect, the present invention provides a 72-slot 6-pole hairpin-shaped flat wire armature winding, comprising: being obtained by using three-phase parallel flat wires of U phase, V phase and W phase and threading hairpins through a ring-shaped stator with n layers and 72 stator slot positions inside;

[0009] The U-phase winding includes two parallel branches. The first branch and the second branch are respectively formed by the flat wire starting from the first starting point and the second starting point at the nth layer and sequentially winding in a circumferential spiral reciprocating manner along the direction of n - 1, reaching the first layer, and then reversely winding in a circumferential spiral reciprocating manner along the direction of n + 1 from the first layer to the nth layer, and constructing a loop after reciprocating winding between the nth layer and the first layer to the first end point and the second end point at the nth layer; wherein, n is an even number of layers;

[0010] The connection modes of the hairpins in the first branch and the second branch are the same, and every two points in each branch are taken as a pair;

[0011] The V-phase winding is obtained by rotating the U-phase winding 8 slot positions along the increasing direction of the slot positions;

[0012] The W-phase winding is obtained by rotating the U-phase winding 16 slot positions along the increasing direction of the slot positions.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Further, when using three-phase parallel two-branch flat wires and threading hairpins through 72 slot positions in 6 layers, the number of poles is 6 and the number of branches is 2; define xy as the yth layer of the xth slot position, where x ∈ [1, 72] and y ∈ [a, f], a is the first layer and is located in the slot, and f is the 6th layer and is located outside the slot;

[0015] For the first branch of the U-phase winding, taking the 14f position point as the initial current inflow point, starting from the 14f position point at the 6th layer, winding in a circumferential spiral reciprocating manner into the slot to the 5th layer, then from the 4th layer winding in a circumferential spiral reciprocating manner into the slot to the 3rd layer, and then from the 2nd layer winding in a circumferential spiral reciprocating manner into the slot to the 1st layer; then reversely winding in a circumferential spiral reciprocating manner out of the slot from the 1st layer to the 2nd layer, then from the 3rd layer winding in a circumferential spiral reciprocating manner out of the slot to the 4th layer, and then from the 5th layer winding in a circumferential spiral reciprocating manner out of the slot to the 6th layer, and after reciprocating winding between the 6th layer and the 1st layer, reaching 27f at the 6th layer, and taking 27f as the final current outflow point.

[0016] Further, define U1+ as the initial current inflow point of the first branch current of the U phase, U1- as the final current outflow point of the first branch current of the U phase, and the connection route of the first branch of the U-phase winding from U1+ to U1- is:

[0017] 14f → 25e → 37f → 50e → 62f → 1e → 13f → 26e → 38f → 49e → 61f → 2e → 14d → 25c → 37d → 50c → 62d → 1c → 13d → 26c → 38d → 49c → 61d → 2c → 14b → 25a → 37b → 50a → 62b → 1a → 13b → 26a → 38b → 49a → 61b → 2a → 15a → 4b → 64a → 51b → 39a → 28b → 16a → 3b → 63a → 52b → 40a → 27b → 15c → 4d → 64c → 51d → 39c → 28d → 16c → 3d → 63c → 52d → 40c → 27d → 15e → 4f → 64d → 51f → 39e → 28f → 16e → 3f → 63d → 52f → 40e → 27f。

[0018] Further, for the second branch of the U-phase winding, taking the 15f position as the initial current inflow point, starting from the 15f position on the 6th layer, it spirally winds around in a circular motion into the slot to the 5th layer, then from the 4th layer, it spirally winds around in a circular motion into the slot to the 3rd layer, and then from the 2nd layer, it spirally winds around in a circular motion into the slot to the 1st layer; then from the 1st layer, it spirally winds around in a circular motion out of the slot in the reverse order to the 2nd layer, then from the 3rd layer, it spirally winds around in a circular motion out of the slot to the 4th layer, and then from the 5th layer, it spirally winds around in a circular motion out of the slot to the 6th layer. After winding back and forth between the 6th layer and the 1st layer, it reaches 26f on the 6th layer, taking 26f as the final current outflow point.

[0019] Further, define U2+ as the initial current inflow point of the second branch current of the U-phase, and U2- as the final current outflow point of the second branch current of the U-phase. The connection route of the second branch of the U-phase winding from U2+ to U2- is:

[0020] 15f → 28e → 40f → 51e → 63f → 4e → 16f → 27e → 39f → 52e → 64f → 3e → 15d → 28c → 40d → 51c → 63d → 4c → 16d → 27c → 39d → 52c → 64d → 3c → 15b → 28a → 40b → 51a → 63b → 4a → 16b → 27a → 39b → 52a → 64b → 3a → 14a → 1b → 61a → 50b → 38a → 25b → 13a → 2b → 62a → 49b → 37a → 26b → 14c → 1d → 61c → 50d → 38c → 25d → 13c → 2d → 62c → 49d → 37c → 26d → 14e → 1f → 61d → 50f → 38e → 25f → 13e → 2f → 62d → 49f → 37e → 26f。

[0021] Further, in the first branch and / or the second branch of the U-phase winding, the current flows into the left end of the first hairpin and flows out from the right end of the last hairpin.

[0022] Further, among the first hairpin to the last hairpin, starting from the first hairpin, adjacent two points share one hairpin, and the adjacent ends of adjacent two hairpins are twisted by the stripped paint end and then welded together.

[0023] In a second aspect, the present invention further provides a motor, including: a rotor and a 72-slot 6-pole hairpin type flat wire armature winding as described in any item of the first aspect; the rotor can rotate relative to the 72-slot 6-pole hairpin type flat wire armature winding.

[0024] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0025] The 72-slot 6-pole hairpin type flat wire armature winding provided by the present invention is obtained by using three-phase parallel flat wires of U phase, V phase and W phase and threading hairpins through a ring-shaped stator with n layers of 72 stator slots inside; the U-phase winding includes two parallel branches. The first branch and the second branch are respectively spirally wound in a circular motion along the direction of n - 1 in turn by flat wires starting from the first starting point and the second starting point located on the nth layer in cooperation with hairpins, reaching the first layer, and then spirally wound in a circular motion along the direction of n + 1 in turn from the first layer in the reverse direction until reaching the nth layer, and forming a loop circuit at the first end point and the second end point located on the nth layer after reciprocating winding between the nth layer and the first layer; where n is an even number of layers; the connection methods of the hairpins in the first branch and the second branch are the same, and every two points in each branch are taken as a pair; the V-phase winding is obtained by rotating 8 slots in the direction of increasing slot positions relative to the U-phase winding; the W-phase winding is obtained by rotating 16 slots in the direction of increasing slot positions relative to the U-phase winding, forming a 72-slot 6-pole hairpin type flat wire armature winding, providing a new hairpin type flat wire armature winding method.

[0026] Compared with the existing hairpin type windings, the 72-slot 6-pole hairpin type flat wire armature winding provided by the present invention is beneficial to improving the slot fill factor of the motor by optimizing the winding structure and connection method, so as to generate a higher magnetic field intensity, improve the motor power, and achieve the potential balance of the currents in each parallel branch; this not only eliminates the additional copper loss caused by current imbalance, but also improves the efficiency and continuous performance of the motor at high speeds; and the winding structure is simple, the process manufacturability is good, and it is suitable for mass production, providing a theoretical basis for the motor stator products.

[0027] Further, the motor provided by the present invention includes the above-mentioned 72-slot 6-pole hairpin type flat wire armature winding. Therefore, it has at least all the technical effects of the above-mentioned 72-slot 6-pole hairpin type flat wire armature winding, which will not be elaborated here. Description of the Drawings

[0028] Figure 1Slot Conductor Distribution Diagram of the 72-Slot 6-Pole Hairpin-Type Flat Wire Armature Winding Provided by the Embodiment of the Present Invention

[0029] Figure 2 Schematic Diagram of the U-Phase Winding of the 72-Slot 6-Pole Hairpin-Type Flat Wire Armature Winding Provided by the Embodiment of the Present Invention

[0030] Figure 3 Schematic Diagram of the Welding End Winding of the First Branch of the U-Phase of the 72-Slot 6-Pole Hairpin-Type Flat Wire Armature Winding Provided by the Embodiment of the Present Invention

[0031] Figure 4 Schematic Diagram of the Welding End Winding of the Second Branch of the U-Phase of the 72-Slot 6-Pole Hairpin-Type Flat Wire Armature Winding Provided by the Embodiment of the Present Invention

[0032] Figure 5 Schematic Diagram of the V-Phase Winding of the 72-Slot 6-Pole Hairpin-Type Flat Wire Armature Winding Provided by the Embodiment of the Present Invention

[0033] Figure 6 Schematic Diagram of the W-Phase Winding of the 72-Slot 6-Pole Hairpin-Type Flat Wire Armature Winding Provided by the Embodiment of the Present Invention Detailed Embodiment

[0034] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0035] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but cannot be used to limit the scope of the present invention.

[0036] In a first aspect, the embodiment of the present invention provides a 72-slot 6-pole hairpin-type flat wire armature winding, including: obtained by using three-phase parallel flat wires of U-phase, V-phase, and W-phase and cooperating with hairpins to pass through and wind around a ring-shaped stator with n layers and 72 stator slot positions inside.

[0037] The U-phase winding includes two parallel branches. The first branch and the second branch respectively start from the first starting point and the second starting point located on the nth layer and cooperate with hairpins to successively wind in a circumferential spiral reciprocating manner along the direction of n - 1 to the first layer, and then reverse from the first layer and successively wind in a circumferential spiral reciprocating manner along the direction of n + 1 to the nth layer. After reciprocating winding between the nth layer and the first layer, a ring-shaped loop is constructed at the first end point and the second end point located on the nth layer; wherein, n is an even number of layers.

[0038] The connection methods of the hairpins in the first branch and the second branch are the same, and every two points in each branch are taken as a pair.

[0039] The V-phase winding is obtained by rotating 8 slots in the increasing slot position direction relative to the U-phase winding.

[0040] The W-phase winding is obtained by rotating 16 slots in the increasing slot position direction relative to the U-phase winding.

[0041] As Figure 1 shown, the winding provided by the embodiment of the present invention has 6 layers of slots. Taking the example of a flat wire passing through 72 slots in 6 layers with three-phase parallel two-branches, the number of poles is 6. Define xy as the y-th layer of the x-th slot, where x ∈ [1, 72], y ∈ [a, f], and a~f are the layer numbers 1-6 of the conductors in the slot. a is the layer located inside the slot, and f is the layer located outside the slot. For example: 1a refers to the a-th layer of the 1st stator slot.

[0042] As Figures 2 to 6 shown, the winding provided by the embodiment of the present invention has 6 layers of slots. Taking the example of a flat wire passing through 72 slots in 6 layers with three-phase parallel two-branches, the number of poles is 6. Define xy as the y-th layer of the x-th slot, where x ∈ [1, 72], y ∈ [a, f], and a~f are the layer numbers 1-6 of the conductors in the slot. a is the layer located inside the slot. For example: 1a refers to the a-th layer of the 1st stator slot.

[0043] In the table, 1~72 are the marked sequence of the current flowing through the slots. Among them, the number 1 is the position where the current of this branch starts to flow in, that is, U+, and the number 64 is the position where the current of this branch finally flows out, that is, U-. That is, U1+ is the initial inflow point of the first branch current of the U-phase, and U1- is the final outflow point of the first branch current of the U-phase.

[0044] Among them, AA is the first branch of the U-phase, AB is the second branch of the U-phase, AA1 and AB1 are the lead-out ends of the U-phase line, and AA64 and AB64 are the lead-out ends of the neutral line.

[0045] It should be noted that: the lead-out wire end and the neutral line end can be swapped, that is, AA1 and AB1 can also be set as the lead-out ends of the neutral line, and AA64 and AB64 can be set as the lead-out ends of the U-phase line.

[0046] Figure 2 Shown is the schematic diagram of the U-phase winding of the 6-layer 72-slot 6-pole hairpin flat wire armature winding. Figure 3Shown is the first branch of the U-phase winding. Taking the 14f point as the initial current inflow point, starting from the 14f point on the 6th layer, it spirally winds around in a circular motion into the slot to the 5th layer, then from the 4th layer spirally winds around in a circular motion into the slot to the 3rd layer, and then from the 2nd layer spirally winds around in a circular motion into the slot to the 1st layer; then from the 1st layer, it spirally winds around in a circular motion out of the slot in the reverse order to the 2nd layer, then from the 3rd layer spirally winds around in a circular motion out of the slot to the 4th layer, and then from the 5th layer spirally winds around in a circular motion out of the slot to the 6th layer. After winding back and forth between the 6th layer and the 1st layer, it reaches 27f on the 6th layer, and takes 27f as the final current outflow point.

[0047] In the first branch of the U-phase winding, the current flows into the left end of the first hairpin and flows out from the right end of the last hairpin. Among the first hairpin to the last hairpin, starting from the first hairpin, two adjacent points share one hairpin, and the adjacent ends of two adjacent hairpins are twisted after stripping the paint and then welded together.

[0048] The winding introduction of the first branch and the second branch in the U-phase in the specific embodiment is as follows:

[0049] The winding connection route of the first branch U+ to U- in the U-phase is as Figure 3 shown (where the dotted line is the connection of the welding end). Define U1+ as the initial current inflow point of the first branch in the U-phase, and U1- as the final current outflow point of the first branch in the U-phase. The flat wire and hairpin connection route of U+ to U- in the first branch of the U-phase winding is:

[0050] 14f → 25e → 37f → 50e → 62f → 1e → 13f → 26e → 38f → 49e → 61f → 2e → 14d → 25c → 37d → 50c → 62d → 1c → 13d → 26c → 38d → 49c → 61d → 2c → 14b → 25a → 37b → 50a → 62b → 1a → 13b → 26a → 38b → 49a → 61b → 2a → 15a → 4b → 64a → 51b → 39a → 28b → 16a → 3b → 63a → 52b → 40a → 27b → 15c → 4d → 64c → 51d → 39c → 28d → 16c → 3d → 63c → 52d → 40c → 27d → 15e → 4f → 64d → 51f → 39e → 28f → 16e → 3f → 63d → 52f → 40e → 27f; It flows in from 14f and finally flows out from 27f.

[0051] Specifically, the current flows in from the left end of the first hairpin, i.e., 14f. The right end of the first hairpin (AA1 and AA2 form a hairpin, and the AA2 end is twisted to the right at the stripped paint end in slot No. 25 of layer e) and the left end of the second hairpin (AA3 and AA4 form a hairpin, i.e., the AA3 end is in slot No. 37 of layer f and is twisted to the left at the stripped paint end) are welded together after being twisted at the stripped paint end (i.e., AA2 and AA3 are connected by welding). The right end of the second hairpin (AA4 is in slot No. 50 of layer e and is twisted to the right at the stripped paint end) and the left end of the third hairpin (AA5 and AA6 form a hairpin, i.e., the AA5 end is in slot No. 62 of layer f and is twisted to the left at the stripped paint end) are also welded together after being twisted at the stripped paint end (i.e., AA4 and AA5 are connected by welding). The current flow direction of this winding is f - e - f - e... layer e, d - c - d - c... layer c, b - a - b - a... layer a, a - b - a - b... layer b, b - a - b - a... layer a, c - d - c - d... layer d, e - f - e - f... layer f, and so on, and finally flows out from 27f (i.e., U-).

[0052] The second branch of the U-phase winding takes the 15f site as the initial current inflow point. Starting from the 15f site on the 6th layer, it spirally winds circularly into the slot to the 5th layer, then from the 4th layer spirally winds circularly into the slot to the 3rd layer, and then from the 2nd layer spirally winds circularly into the slot to the 1st layer; then from the 1st layer, it spirally winds circularly out of the slot in reverse order to the 2nd layer, then from the 3rd layer spirally winds circularly out of the slot to the 4th layer, and then from the 5th layer spirally winds circularly out of the slot to the 6th layer. After winding back and forth between the 6th layer and the 1st layer, it reaches 26f on the 6th layer, and takes 26f as the final current outflow point.

[0053] The winding connection route of the first branch U+ to U- in the U-phase is as Figure 4 shown (where the dotted line is the connection of the welding end). Define U2+ as the initial current inflow point of the second branch current in the U-phase, and U2- as the final current outflow point of the second branch current in the U-phase. The connection route of the second branch of the U-phase winding from U2+ to U2- is:

[0054] 15f → 28e → 40f → 51e → 63f → 4e → 16f → 27e → 39f → 52e → 64f → 3e → 15d → 28c → 40d → 51c → 63d → 4c → 16d → 27c → 39d → 52c → 64d → 3c → 15b → 28a → 40b → 51a → 63b → 4a → 16b → 27a → 39b → 52a → 64b → 3a → 14a → 1b → 61a → 50b → 38a → 25b → 13a → 2b → 62a → 49b → 37a → 26b → 14c → 1d → 61c → 50d → 38c → 25d → 13c → 2d → 62c → 49d → 37c → 26d → 14e → 1f → 61d → 50f → 38e → 25f → 13e → 2f → 62d → 49f → 37e → 26f。

[0055] Specifically, the current flows in from the left end of the first hairpin, i.e., 15f. The right end of the first hairpin (AB1 and AB2 form a hairpin, and the AB2 end is twisted to the right at the stripped paint end in slot No. 28 of layer e) and the left end of the second hairpin (AB3 and AB4 arrows form a hairpin, i.e., the AB3 end is in slot No. 40 of layer f and is twisted to the left at the stripped paint end) are welded together after being twisted at the stripped paint end (i.e., AB2 and AB3 are connected by welding). The right end of the second hairpin (AB4 is in slot No. 51 of layer e and the stripped paint end is twisted to the right) and the left end of the third hairpin (AB5 and AB6 form a hairpin, i.e., the AB5 end is in slot No. 63 of layer f and the stripped paint end is twisted to the left) are also welded together after being twisted at the stripped paint end (i.e., AB4 and AB5 are connected by welding). The current flow direction of this winding is f - e - f - e... for layer e, d - c - d - c... for layer c, b - a - b - a... for layer a, a - b - a - b... for layer b, b - a - b - a... for layer a, c - d - c - d... for layer d, e - f - e - f... for layer f, and so on, and finally flows out from 26f (i.e., U-).

[0056] The winding method of the V-phase winding is obtained by rotating the U-phase winding 8 slot positions in the direction of increasing slot numbers. As Figure 4 shown, the first branch flows in from the f layer of slot No. 22 (22f) and finally flows out from the f layer of slot No. 35 (35f). The second branch flows in from the f layer of slot No. 23 (23f) and finally flows out from the f layer of slot No. 34 (34f). Those skilled in the art can perform the corresponding winding operations according to the above content, and the detailed connection routes will not be elaborated here.

[0057] The winding method of the W-phase winding is obtained by rotating the U-phase winding 16 slot positions in the direction of increasing slot numbers. As Figure 5As shown, the first branch flows into the f-th layer of slot No. 30 (30f), and finally flows out of the f-th layer of slot No. 19 (19f), and the second branch flows into the f-th layer of slot No. 31 (31f), and finally flows out of the f-th layer of slot No. 19 (19f). Those skilled in the art perform corresponding winding operations according to the above contents, and the detailed connection routes are not repeated here.

[0058] The embodiment adopted in the present invention is a 6-layer flat wire armature winding, but in the specific implementation process, the winding of 4, 6, 10, 12 or other even-numbered layers of flat wire armature winding can be achieved by deleting or increasing the number of layers of cross-wires. It can also be wound by moving the upper 4 layers or the lower 4 layers of windings to the left or right by a certain number of slots, or by moving the base layer or the even layer to the left or right by a certain number of slots. Therefore, the winding method adopted in the present invention and the hairpin coil compatible with the winding method are not limited to the winding of the 6-layer flat wire armature winding of this embodiment.

[0059] AA1 and AA64 can be connected into a ring loop from the layout position, so the two branch lead-out ends of the single-phase can be selected from any point on the loop. For example, the phase lead-out line of the first branch of the U phase can be AA28, and the neutral lead-out end is the corresponding welding end AA29. The other two branches can also arbitrarily select the phase lead-out end and the neutral lead-out end in the same direction, and the selected starting point numbers do not need to be consistent. The winding method of the other two phases can refer to the U phase to select the starting and ending points of the phase lead-out end and the neutral line.

[0060] This winding design has significant advantages in improving the motor slot full rate. It can more effectively utilize the space in the motor slot, thereby generating a stronger magnetic field strength. This enhancement not only directly improves the output power of the motor, but also ensures the high efficiency and stability of the motor during operation. More importantly, through careful design, the winding achieves a perfect balance of the potential of each branch, fundamentally eliminating the circulation phenomenon. This feature is of great significance for reducing energy consumption and extending the service life of the motor.

[0061] In addition, the design of the winding structure adheres to the principle of simplicity but not simplicity. Its structure is intuitive and easy to understand, which is not only convenient for installation and maintenance, but also greatly improves the process manufacturability. This design concept is very suitable for the needs of modern production lines and provides a solid guarantee for mass and efficient production. Therefore, this winding technology not only lays a solid theoretical foundation for the design and manufacture of motor stator products, but also promotes the innovation and progress of motor technology and opens up a new path to achieve comprehensive improvement of motor performance.

[0062] In a second aspect, an embodiment of the present invention further provides a motor, comprising: a rotor and a 72-slot 6-pole hairpin flat wire armature winding as described in any embodiment of the first aspect above; the rotor can rotate relative to the 72-slot 6-pole hairpin flat wire armature winding.

[0063] Since the motor adopts the 72-slot 6-pole hairpin-shaped flat wire armature winding described in the above embodiments, the specific structure of the 72-slot 6-pole hairpin-shaped flat wire armature winding refers to the above embodiments. Since the motor adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A 72-slot 6-pole hairpin flat wire armature winding, characterized in that: include: The method is obtained by using three-phase parallel flat wires of U phase, V phase and W phase in combination with hairpins to pass through a ring-shaped stator having n layers and 72 stator slots on the inner side; The U-phase winding includes two parallel branches, the first branch and the second branch are respectively composed of a flat wire starting from the first starting point and the second starting point located at the nth layer, and are wound in a circular spiral in the direction of n-1 in cooperation with a hairpin to the first layer, and then are wound in a circular spiral in the reverse direction from the first layer in the direction of n+1 to the nth layer, and are wound in a circular spiral between the nth layer and the first layer to the first end point and the second end point located at the nth layer to form a ring loop; wherein n is an even number of layers; The hairpins in the first branch and the second branch are connected in the same manner, and every two points in each branch serve as a pair; The V-phase winding is obtained by rotating 8 slots relative to the U-phase winding in the direction of increasing slots; The W-phase winding is obtained by rotating 16 slots relative to the U-phase winding in the direction of increasing slots; When a three-phase flat wire with two branches in parallel is used with a hairpin to pass through 6 layers and 72 slots, the number of poles is 6 and the number of branches is 2; xy is defined as the yth layer of the xth slot, where x∈[1,72], y∈[a,f], a is the 1st layer, located in the slot, and f is the 6th layer, located outside the slot; The first branch of the U-phase winding takes the 14f position as the initial inflow point of the current, and starts from the 14f position located at the 6th layer, and then goes back and forth in a circular spiral into the slot to the 5th layer, and then goes back and forth in a circular spiral into the slot from the 4th layer to the 3rd layer, and then goes back and forth in a circular spiral into the slot from the 2nd layer to the 1st layer; then goes back and forth in a circular spiral outward from the 1st layer in reverse order to the 2nd layer, and then goes back and forth in a circular spiral outward from the 3rd layer to the 4th layer, and then goes back and forth in a circular spiral outward from the 5th layer to the 6th layer, and then goes back and forth between the 6th layer and the 1st layer to 27f located at the 6th layer, and takes 27f as the final outflow point of the current; The second branch of the U-phase winding takes the 15f position as the initial inflow point of the current, and starts from the 15f position located at the 6th layer, and then goes back and forth in a circular spiral into the slot to the 5th layer, and then goes back and forth in a circular spiral into the slot from the 4th layer to the 3rd layer, and then goes back and forth in a circular spiral into the slot from the 2nd layer to the 1st layer; then goes back and forth in a circular spiral outward from the 1st layer in reverse order to the 2nd layer, and then goes back and forth in a circular spiral outward from the 3rd layer to the 4th layer, and then goes back and forth in a circular spiral outward from the 5th layer to the 6th layer, and then goes back and forth between the 6th layer and the 1st layer to 26f located at the 6th layer, and takes 26f as the final outflow point of the current; Define U2+ as the initial inflow point of the second branch current on the U phase, and U2- as the final outflow point of the second branch current on the U phase. The link route of the second branch of the U phase winding from U2+ to U2- is: 15f→28e→40f→51e→63f→4e→16f→27e→39f→52e→64f→3e→15d→28c→40d→51c→63d→4c→16d→27c→39d→52c→64d→3c→15b→28a→40b→51a→63b→4a→16b→27a→39b→52a→64b→3a→ 14a→1b→61a→50b→38a→25b→13a→2b→62a→49b→37a→26b→14c→1d→61c→50d→38c→25d→13c→2d→62c→49d→37c→26d→14e→1f→61d→50f→38e→25f→13e→2f→62d→49f→37e→26f.

2. The 72-slot 6-pole hairpin flat wire armature winding according to claim 1, characterized in that: In the first branch and / or the second branch of the U-phase winding, current flows in from the left end of the first hairpin and flows out from the right end of the last hairpin.

3. The 72-slot 6-pole hairpin flat wire armature winding according to claim 2, characterized in that: From the first hairpin to the last hairpin, starting from the first hairpin, two adjacent points share a hairpin, and the adjacent ends of the two adjacent hairpins are twisted and welded together through the paint stripping ends.

4. A motor, characterized in that: include: A rotor and a 72-slot 6-pole hairpin flat wire armature winding as claimed in any one of claims 1 to 3; the rotor is rotatable relative to the 72-slot 6-pole hairpin flat wire armature winding.

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