Stator, flat wire motor and stator assembling method

Abstract

The invention discloses a stator, a flat wire motor and an assembling method of the stator. The stator comprises an iron core and a winding, the iron core is provided with a plurality of first containing grooves and a plurality of second containing grooves, the first containing grooves and the second containing grooves are alternately distributed at intervals in the axial direction of the stator and penetrate through the iron core in the axial direction of the stator, and the winding comprises a plurality of flat wire conductors inserted into the containing grooves. And two ends of each flat wire conductor extend out of the accommodating groove relative to the iron core. Wherein the depth of the first accommodating groove is larger than that of the second accommodating groove along the direction from the axis of the stator to the edge, so that the accommodating space of the first accommodating groove is larger than that of the second accommodating groove, more flat wire conductors can be accommodated in the first accommodating groove, and the overall number of the flat wire conductors in the stator can be increased; the output torque of the flat wire motor is improved, so that the working performance of the flat wire motor is improved under the condition that the magnitude of input current is not changed, and actual use requirements are better met.

Description

Technical Field

[0001] The present application relates to the technical field of flat wire motors, and in particular to a stator, a flat wire motor and a stator assembly method. Background Art

[0002] With the development of new energy vehicle technology, the requirements for the power density and torque density of the drive motor are getting higher and higher. It is very important to improve the power performance of the drive motor within its limited size. Among them, the drive motor is one of the key components of new energy vehicles. The greater the output torque of the drive motor, the stronger the power performance of the vehicle.

[0003] The existing flat wire motor stator includes a connected iron core yoke and iron core teeth. During the operation of the flat wire motor, the iron core yoke magnetic circuit will produce electromagnetic saturation under the excitation of the peak current, thereby increasing the power loss of the flat wire motor. In addition, when the iron core yoke produces magnetic saturation, the iron core teeth will also produce magnetic saturation. At this time, if the output torque is increased by increasing the input current, not only will the output torque of the flat wire motor not be effectively improved, but it will also cause energy waste. Summary of the invention

[0004] In view of this, the present application provides a stator, a flat wire motor and a stator assembly method to solve the technical problem of low output torque of the flat wire motor in the prior art.

[0005] The present application provides a stator for a flat wire motor, the stator comprising an iron core and a winding, the iron core being provided with a plurality of accommodating grooves, the plurality of accommodating grooves being distributed at intervals along the circumference of the stator and penetrating the iron core along the axial direction of the stator, the winding comprising a plurality of flat wire conductors, the plurality of flat wire conductors being inserted into the plurality of accommodating grooves, and both ends of each of the flat wire conductors extending out of the accommodating groove along the axial direction of the stator relative to the iron core.

[0006] Wherein, the accommodating groove includes at least a first accommodating groove and a second accommodating groove, the first accommodating groove and the second accommodating groove are alternately arranged along the circumference of the stator, and along the direction of the stator axis toward the edge, the depth of the first accommodating groove is H1, the depth of the second accommodating groove is H2, and H1 and H2 satisfy H1>H2.

[0007] In an embodiment of the present application, the iron core is provided with a plurality of first accommodating grooves and a plurality of second accommodating grooves, and along the direction from the axis of the stator toward the edge, the depth of the first accommodating groove is greater than the depth of the second accommodating groove, so that the accommodating space of the first accommodating groove is greater than the accommodating space of the second accommodating groove. Therefore, during the assembly process of the iron core and the winding, the number of flat wire conductors accommodated by the first accommodating groove is greater than the number of flat wire conductors accommodated by the second accommodating groove, thereby enabling the iron core provided by the present application to accommodate more flat wire conductors than the stator iron core in the prior art.

[0008] Therefore, during the operation of the flat wire motor, when the input current is the same, the stator provided in the present application has a larger conductive area due to its large number of flat wire conductors, so that when the current flows through the winding, the overall conductivity of the winding is improved, thereby increasing the magnetic field strength generated by the winding and reducing energy loss, which is beneficial to increasing the output torque of the flat wire motor, so as to improve the working performance of the flat wire motor without changing the input current, which is more in line with actual usage needs.

[0009] At the same time, since the depth of the first accommodating groove is greater than the depth of the second accommodating groove, there is a larger contact area between the flat wire conductor located in the first accommodating groove and the iron core, so as to improve the heat dissipation efficiency of the flat wire conductor during the operation of the flat wire motor, thereby reducing the loss of the flat wire conductor, and thus making the winding provided in the present application have a longer service life than the stator winding in the prior art.

[0010] In a possible implementation, multiple layers of plug-in areas are provided in both the first receiving slot and the second receiving slot, the number of the plug-in areas in the first receiving slot is X, the number of the plug-in areas in the second receiving slot is Y, and X and Y satisfy XY≥1.

[0011] In a possible implementation manner, the winding includes a U-phase winding, a V-phase winding, and a W-phase winding, and each phase winding includes a first branch and a second branch, and the first branch and the second branch are arranged in parallel.

[0012] Each branch includes a first coil unit, a second coil unit, a third coil unit and a fourth coil unit. The first coil unit, the second coil unit, the third coil unit and the fourth coil unit are distributed along the circumferential direction of the stator and are connected to two adjacent coil units in sequence end to end. The head end of each of the first coil units is connected to a power supply, and the ends of each of the fourth coil units are connected to each other.

[0013] In a possible implementation, the winding further includes a plurality of first connecting members, a plurality of second connecting members, a plurality of third connecting members and a plurality of the flat wire conductors. Along the circumference of the stator, the flat wire conductors are connected by different connecting members to form the first branch and the second branch.

[0014] In the first branch, the end of the first coil unit and the beginning of the second coil unit are connected via the third connecting member, the end of the second coil unit and the beginning of the third coil unit are connected via the first connecting member, and the end of the third coil unit and the beginning of the fourth coil unit are connected via the third connecting member.

[0015] In the second branch, the end of the first coil unit and the beginning of the second coil unit are connected via the first connecting member, the end of the second coil unit and the beginning of the third coil unit are connected via the third connecting member, and the end of the third coil unit and the beginning of the fourth coil unit are connected via the first connecting member.

[0016] The length of the first connecting member is L1, the length of the second connecting member is L2, the length of the third connecting member is L3, and L1, L2 and L3 satisfy the following conditions.

[0017] L3>L2, L3>L1, L2>L1.

[0018] In a possible embodiment, the flat wire conductor includes a first straight line segment, a second straight line segment, a first bent segment, a second bent segment and a main body, wherein two ends of the main body are respectively connected to one end of the first straight line segment and the second straight line segment, the other end of the first straight line segment is connected to the first bent segment, and the other end of the second straight line segment is connected to the second bent segment.

[0019] Along the circumference of the stator, the bending directions of the first bending segment and the second bending segment are opposite.

[0020] In a possible implementation, the number of the accommodating slots is S, and S is 48; the number of poles of the flat wire motor is P, and P is 8; the number of phases of the flat wire motor is M, and M is 3; the number of the accommodating slots corresponding to each pole of the flat wire motor is N, and N is 2.

[0021] The first accommodating groove includes a first plug-in area, a second plug-in area, a third plug-in area, a fourth plug-in area and a fifth plug-in area, and the first plug-in area, the second plug-in area, the third plug-in area, the fourth plug-in area and the fifth plug-in area are arranged in sequence along the direction from the axis of the stator to the edge.

[0022] The second accommodating groove includes a first plug-in area, a second plug-in area, a third plug-in area, a fourth plug-in area, a fifth plug-in area and a sixth plug-in area, and the first plug-in area, the second plug-in area, the third plug-in area, the fourth plug-in area, the fifth plug-in area and the sixth plug-in area are arranged in sequence along the direction from the axis of the stator toward the edge.

[0023] Among them, the first plug-in area is a, the second plug-in area is b, the third plug-in area is c, the fourth plug-in area is d, the fifth plug-in area is e, and the sixth plug-in area is f.

[0024] In a possible implementation manner, the winding includes a U-phase winding, a first end of a first branch of the U-phase winding starts from the first containing groove, and a first end of a second branch of the U-phase winding starts from the second containing groove.

[0025] The connection mode of the first branch of the U-phase winding is:

[0026] The flat wire conductors are inserted into 9a and 15b, 21c and 27d, 33e and 39f, 45f and 39e, 33d and 27c, 21b and 15a, 22a and 28b, 34c and 40d, 46e and 4e, 46d and 40c, 34b and 28a, 33a and 39b, 45c and 3d, 9e and 15f, 21f and 15e, 9d and 3c, 45b and 39a, 46a and 4b, 10c and 16d, 22e and 28e, 22d and 16c, 10b and 4a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0027] Among them, 9a to 15a are the first coil units, 22a to 28a are the second coil units, 33a to 39a are the third coil units, and 46a to 4a are the fourth coil units.

[0028] The connection mode of the second branch of the U-phase winding is:

[0029] The flat wire conductors are inserted into 10a and 16b, 22c and 28d, 34e and 40e, 34d and 28c, 22b and 16a, 21a and 27b, 33c and 39d, 45e and 3f, 9f and 3e, 45d and 39c, 33b and 27a, 34a and 40b, 46c and 4d, 10e and 16e, 10d and 4c, 46b and 40a, 45a and 3b, 9c and 15d, 21e and 27f, 33f and 27e, 21d and 15c, 9b and 3a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0030] Among them, 10a to 16a are the first coil units, 21a to 27a are the second coil units, 34a to 40a are the third coil units, and 45a to 3a are the fourth coil units.

[0031] In a possible implementation manner, the winding includes a V-phase winding, a first end of a first branch of the V-phase winding starts from the first containing slot, and a first end of a second branch of the V-phase winding starts from the second containing slot.

[0032] The connection mode of the first branch of the V-phase winding is:

[0033] The flat wire conductors are inserted in sequence into 13a and 19b, 25c and 31d, 37e and 43f, 1f and 43e, 37d and 31c, 25b and 19a, 26a and 32b, 38c and 44d, 2e and 8e, 2d and 44c, 38b and 32a, 37a and 43b, 1c and 7d, 13e and 19f, 25f and 19e, 13d and 7c, 1b and 43a, 2a and 8b, 14c and 20d, 26e and 32e, 26d and 20c, and 14b and 8a, and two adjacent flat wire conductors are connected by different connecting parts.

[0034] Among them, 13a to 19a are the first coil units, 26a to 32a are the second coil units, 37a to 43a are the third coil units, and 2a to 8a are the fourth coil units.

[0035] The connection mode of the second branch of the V-phase winding is:

[0036] The flat wire conductors are inserted into 14a and 20b, 26c and 32d, 38e and 44e, 38d and 32c, 26b and 20a, 25a and 31b, 37c and 43d, 1e and 7f, 13f and 7e, 1d and 43c, 37b and 31a, 38a and 44b, 2c and 8d, 14e and 20e, 14d and 8c, 2b and 44a, 1a and 7b, 13c and 19d, 25e and 31f, 37f and 31e, 25d and 19c, and 13b and 7a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0037] Among them, 14a to 20a are the first coil units, 25a to 31a are the second coil units, 38a to 44a are the third coil units, and 1a to 7a are the fourth coil units.

[0038] In a possible implementation manner, the winding includes a W-phase winding, a first end of a first branch of the W-phase winding starts from the first containing slot, and a first end of a second branch of the W-phase winding starts from the second containing slot.

[0039] The connection mode of the first branch of the W-phase winding is:

[0040] The flat wire conductors are inserted into 17a and 23b, 29c and 35d, 41e and 47f, 5f and 47e, 41d and 35c, 29b and 23a, 30a and 36b, 42c and 48d, 6e and 12e, 6d and 48c, 42b and 36a, 41a and 47b, 5c and 11d, 17e and 23f, 29f and 23e, 17d and 11c, 5b and 47a, 6a and 12b, 18c and 24d, 30e and 36e, 30d and 24c, 18b and 12a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0041] Among them, 17a to 23a are the first coil units, 30a to 36a are the second coil units, 41a to 47a are the third coil units, and 6a to 12a are the fourth coil units.

[0042] The connection mode of the second branch of the W-phase winding is:

[0043] The flat wire conductors are inserted into 18a and 24b, 30c and 36d, 42e and 48e, 42d and 36c, 30b and 24a, 29a and 35b, 41c and 47d, 5e and 11f, 17f and 11e, 5d and 47c, 41b and 35a, 42a and 48b, 6c and 12d, 18e and 24e, 18d and 12c, 6b and 48a, 5a and 11b, 17c and 23d, 29e and 35f, 41f and 35e, 29d and 23c, and 17b and 11a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0044] Among them, 18a to 24a are the first coil units, 29a to 35a are the second coil units, 42a to 48a are the third coil units, and 5a to 11a are the fourth coil units.

[0045] The present application also provides a flat wire motor, which includes a stator and a rotor, wherein the stator is any of the stators described above, wherein the rotor is coaxially arranged with the stator, and the rotor can rotate along its axial direction relative to the stator.

[0046] In the embodiment of the present application, the rotor and the stator are coaxially arranged. When current is input to the flat wire motor, the stator can generate a magnetic field to drive the rotor to rotate along its axial direction, thereby converting electrical energy into mechanical energy output through the flat wire motor. During the operation of the flat wire motor, since the flat wire motor provided by the present application can accommodate more flat wire conductors, the flat wire motor provided by the present application can have a higher output torque, so that it has better working performance and is more in line with actual use requirements.

[0047] The present application also provides a stator assembly method for assembling the stator described in any one of the above items, the assembly method comprising:

[0048] Insert the first part of the flat wire conductor into each of the receiving grooves in sequence along the first direction, and stop after one end of the first part of the flat wire conductor is inserted into the insertion area of ​​the receiving groove, wherein along the direction of the stator axis toward the edge, the insertion area is located on the side of the receiving groove farthest from the stator axis.

[0049] Insert the second portion of the flat wire conductor into each of the receiving grooves in sequence along the second direction, and stop after one end of the second portion of the flat wire conductor is inserted into the insertion area of ​​the receiving groove, wherein the insertion area is located on the side of the receiving groove closest to the stator axis along the direction from the stator axis toward the edge.

[0050] The process is repeated for a preset number of times and then stopped to form the first branch or the second branch of the winding.

[0051] The first direction is opposite to the second direction.

[0052] In the embodiment of the present application, the flat wire conductor is divided into a first portion of flat wire conductors and a second portion of flat wire conductors.

[0053] During the assembly of the winding 2 and the iron core 1, if the first part of the flat wire conductor is inserted in sequence along the first direction from the first plug-in area of ​​the first receiving slot, since the plug-in areas in the first receiving slot are even, one end of the first part of the flat wire conductor is inserted into any sixth plug-in area and then stops, and the second part of the flat wire conductor is inserted in sequence along the second direction from the sixth plug-in area of ​​another first receiving slot, until one end of the second part of the flat wire conductor is inserted into any first plug-in area and then stops. Repeat the above steps to make one end of the flat wire conductor inserted into the plug-in area farthest from the stator axis in any receiving slot and then reverse, so that the winding can be evenly distributed on the iron core, so that the resistance and inductance of each branch in each phase winding are balanced, and the back electromotive force of each branch is the same, so as to eliminate the phase difference and voltage difference between different branches, and then make the current between each branch balanced, without circulating current, which is conducive to optimizing the spatial harmonics of the flat wire motor and improving the NVH performance of the flat wire motor.

[0054] In a possible implementation, after the first portion of the flat wire conductor is sequentially inserted into each of the receiving grooves along the first direction and one end of the first portion of the flat wire conductor is inserted into the insertion area of ​​the receiving groove and stops, the assembly method further includes:

[0055] Insert the other end of the first portion of the flat wire conductor, one end of which is inserted into the plug-in area, into the plug-in area of ​​another accommodating slot along the tangential direction of the stator, wherein, along the direction of the stator axis toward the edge, the two plug-in areas are located on the side of each accommodating slot that is farthest from the stator axis.

[0056] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0058] Figure 1 is a schematic structural diagram of a stator provided in the present application in one embodiment;

[0059] Figure 2 is a top view of an iron core provided in the present application in one embodiment;

[0060] Figure 3 is a schematic structural diagram of the first containing tank and the second containing tank provided in the present application in an embodiment;

[0061] Figure 4 is a schematic structural diagram of a flat wire conductor provided in the present application in one embodiment;

[0062] Figure 5 This is a comparison chart of the output torque of the stator provided in this application and the existing stator.

[0063] Description of reference numerals:

[0064] 1- Iron core;

[0065] 11- first receiving tank;

[0066] 12- second receiving tank;

[0067] 13- first plug-in area;

[0068] 14- second plug-in area;

[0069] 15- third plug-in area;

[0070] 16- fourth plug-in area;

[0071] 17-fifth plug-in area;

[0072] 18-sixth plug-in area;

[0073] 2- Winding;

[0074] 21- flat wire conductor;

[0075] 211-first straight line segment;

[0076] 212-second straight line segment;

[0077] 213-first bending section;

[0078] 214- second bending section;

[0079] 215-Ontology.

[0080] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0081] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0082] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0083] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0084] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0085] The embodiment of the present application provides a stator for a flat wire motor, such as Figure 1 and Figure 2 As shown, the stator includes an iron core 1 and a winding 2. The iron core 1 is provided with a plurality of receiving slots, which are spaced apart along the circumference of the stator and penetrate the iron core 1 along the axial direction of the stator. The winding 2 includes a plurality of flat wire conductors 21, which are inserted into the plurality of receiving slots, and both ends of each flat wire conductor 21 extend out of the receiving slot along the axial direction of the stator relative to the iron core 1.

[0086] Among them, the accommodating grooves at least include a first accommodating groove 11 and a second accommodating groove 12, the first accommodating groove 11 and the second accommodating groove 12 are alternately arranged along the circumference of the stator, and along the direction of the stator axis toward the edge, the depth of the first accommodating groove 11 is H1, the depth of the second accommodating groove 12 is H2, and H1 and H2 satisfy H1>H2.

[0087] In an embodiment of the present application, the core 1 is provided with a plurality of first accommodating grooves 11 and a plurality of second accommodating grooves 12, and along the direction from the axis of the stator toward the edge, the depth of the first accommodating grooves 11 is greater than the depth of the second accommodating grooves 12, so that the accommodating space of the first accommodating grooves 11 is greater than the accommodating space of the second accommodating grooves 12, so that during the assembly process of the core 1 and the winding 2, the number of flat wire conductors 21 accommodated in the first accommodating grooves 11 is greater than the number of flat wire conductors 21 accommodated in the second accommodating grooves 12, thereby enabling the core 1 provided in the present application to accommodate more flat wire conductors 21 than the stator core in the prior art.

[0088] Therefore, during the operation of the flat wire motor, when the input current is the same, the stator provided in the present application has a larger conductive area due to the large number of flat wire conductors 21, so that when the current flows through the winding 2, the overall conductivity of the winding 2 is improved, thereby increasing the magnetic field strength generated by the winding 2 and reducing energy loss, which is beneficial to increasing the output torque of the flat wire motor, so as to improve the working performance of the flat wire motor without changing the input current, which is more in line with actual usage requirements.

[0089] At the same time, since the depth of the first accommodating groove 11 is greater than the depth of the second accommodating groove 12, there is a larger contact area between the flat wire conductor 21 located in the first accommodating groove 11 and the iron core 1, so as to improve the heat dissipation efficiency of the flat wire conductor 21 during the operation of the flat wire motor, thereby reducing the loss of the flat wire conductor 21, and thus making the winding 2 provided in the present application have a longer service life compared to the stator winding in the prior art.

[0090] In a specific embodiment, Figure 2 and Figure 3 As shown, multiple layers of plug-in areas are provided in the first receiving slot 11 and the second receiving slot 12. The number of plug-in areas in the first receiving slot 11 is X, the number of plug-in areas in the second receiving slot 12 is Y, and X and Y satisfy XY≥1.

[0091] In the embodiment of the present application, XY can be specifically 1, 2, 3, etc., so that the number of plug-in areas of the first receiving slot 11 and the number of plug-in areas of the second receiving slot 12 differ by at least one layer. During the assembly process of the core 1 and the winding 2, the arrangement of the winding 2 can be changed so that the core 1 provided by the present application can accommodate more flat wire conductors 21 compared to the stator core in the prior art, so as to improve the output torque of the flat wire motor.

[0092] Preferably, the number of plug-in areas of the first receiving slot 11 and the number of plug-in areas of the second receiving slot 12 differ by one layer. Without changing the volume of the core 1, the number of plug-in areas of the first receiving slot 11 and the second receiving slot 12 differs by only one layer, which can avoid the core 1 from losing more yoke space, so that the core 1 still has a high magnetic flux density, thereby ensuring the stability and reliability of the flat wire motor during operation. At the same time, the core 1 still has a high mechanical strength, so as to provide stable and reliable support and protection for the winding 2, and during the operation of the flat wire motor, the possibility of deformation and vibration of the core 1 can be reduced, which is beneficial to improving the overall safety of the flat wire motor. In addition, without affecting the working performance of the flat wire motor, there is no need to increase the volume of the core 1, which is also beneficial to improving the working performance of the century-old motor while ensuring the production cost of the flat wire motor, which is more in line with actual production needs.

[0093] In a specific embodiment, the winding 2 includes a U-phase winding, a V-phase winding and a W-phase winding, and the U-phase winding, the V-phase winding and the W-phase winding each include a first branch and a second branch, and the first branch and the second branch are arranged in parallel.

[0094] Each branch includes a first coil unit, a second coil unit, a third coil unit and a fourth coil unit. The first coil unit, the second coil unit, the third coil unit and the fourth coil unit are distributed along the circumferential direction of the stator and are connected to two adjacent coil units in sequence end to end. The head end of each first coil unit is connected to a power supply, and the ends of each fourth coil unit are connected to each other.

[0095] In the embodiment of the present application, by dividing the winding 2 into a U-phase winding, a V-phase winding and a W-phase winding, and further dividing each phase winding into a first branch and a second branch connected in parallel, and making each branch arranged along the circumferential direction of the stator, it is beneficial to balance the potential of the winding 2 and reduce the possibility of circulating current problems, so as to improve the stability and reliability of the flat wire motor during operation. At the same time, it can also reduce the noise and vibration generated by the flat wire motor during operation, so as to improve the noise, vibration and acoustic roughness (Noise, Vibration, Harshness, NVH) performance of the flat wire motor, which is more in line with actual production and use requirements.

[0096] Specifically, each branch of each phase winding includes a first coil unit, a second coil unit, a third coil unit and a fourth coil unit connected in sequence end to end, and along the circumferential direction of the stator, the head end of each first coil unit is connected to the power supply, and the ends of each fourth coil unit are connected to each other, so that the input current can be evenly distributed in each phase winding to generate a rotating magnetic field, thereby making the flat wire motor have a higher power density and working efficiency, and further being able to reduce power consumption and heat generation during the operation of the flat wire motor, so as to improve the overall working performance and service life of the flat wire motor.

[0097] In a specific embodiment, the winding 2 further includes a plurality of first connectors, a plurality of second connectors, a plurality of third connectors and a plurality of flat wire conductors 21. Along the circumference of the stator, the flat wire conductors 21 are connected by different connectors to form a first branch and a second branch.

[0098] In the first branch, the end of the first coil unit and the beginning of the second coil unit are connected via a third connecting member, the end of the second coil unit and the beginning of the third coil unit are connected via the first connecting member, and the end of the third coil unit and the beginning of the fourth coil unit are connected via a third connecting member.

[0099] In the second branch, the end of the first coil unit and the beginning of the second coil unit are connected via a first connecting member, the end of the second coil unit and the beginning of the third coil unit are connected via a third connecting member, and the end of the third coil unit and the beginning of the fourth coil unit are connected via the first connecting member.

[0100] The length of the first connecting member is L1, the length of the second connecting member is L2, the length of the third connecting member is L3, and L1, L2 and L3 satisfy L3>L2, L3>L1, L2>L1.

[0101] In the embodiment of the present application, each flat wire conductor 21 can be connected by different connectors, so that the wiring of the winding 2 is more flexible, so as to ensure that the winding 2 can fill the first accommodating slots 11 and the second accommodating slots 12 of the iron core 1 while forming the first branch and the second branch of each phase winding, thereby ensuring the slot filling rate of the iron core 1, so that the flat wire motor has a higher power density and working efficiency, which is conducive to further improving the working performance of the flat wire motor.

[0102] Specifically, the winding 2 also includes multiple first connectors, multiple second connectors and multiple third connectors, and the length of the third connector is greater than the length of the second connector and greater than the length of the first connector, and the length of the second connector is greater than the length of the first connector.

[0103] In the first branch of each phase winding, the flat wire conductor 21 located at the end of the first coil unit and the flat wire conductor 21 located at the head end of the second coil unit are connected via a third connecting piece, the flat wire conductor 21 located at the end of the second coil unit and the flat wire conductor 21 located at the head end of the third coil unit are connected via a first connecting piece, the flat wire conductor 21 located at the end of the third coil unit and the flat wire conductor 21 located at the head end of the fourth coil unit are connected via a third connecting piece, and the multiple flat wire conductors 21 located in each coil unit are connected via a second connecting piece.

[0104] In the second branch of each phase winding, the flat wire conductor 21 located at the end of the first coil unit and the flat wire conductor 21 located at the head end of the second coil unit are connected via a first connecting piece, the flat wire conductor 21 located at the end of the second coil unit and the flat wire conductor 21 located at the head end of the third coil unit are connected via a third connecting piece, the flat wire conductor 21 located at the end of the third coil unit and the flat wire conductor 21 located at the head end of the fourth coil unit are connected via the first connecting piece, and the multiple flat wire conductors 21 located in each coil unit are connected via a second connecting piece.

[0105] Therefore, by designing connectors of different lengths, the wiring method of the flat wire conductor 21 can be made more flexible and varied, thereby improving the uniformity of the distribution of the winding 2 along the circumference of the stator, so as to improve the stability and reliability of the flat wire motor during operation. At the same time, a reasonable layout of the winding 2 is conducive to reducing the possibility of excessive mutual inductance, thereby further improving the working performance and service life of the flat wire motor.

[0106] In addition, since each flat wire conductor 21 is connected by a connector, and the only difference between the connectors is the length, the flat wire conductors 21 inserted into each receiving slot are all the same flat wire conductors 21, so that the number of types of flat wire conductors 21 used in the stator provided in the present application is relatively small, which is conducive to reducing the types of molds used to produce the flat wire conductors 21, thereby reducing the manufacturing difficulty and production cost of the flat wire conductors 21, and then reducing the production cost of the flat wire motor, which is more in line with actual production needs.

[0107] In a specific embodiment, Figure 4 As shown, the flat wire conductor 21 includes a first straight segment 211, a second straight segment 212, a first bent segment 213, a second bent segment 214 and a main body 215, wherein two ends of the main body 215 are respectively connected to one end of the first straight segment 211 and the second straight segment 212, the other end of the first straight segment 211 is connected to the first bent segment 213, and the other end of the second straight segment 212 is connected to the second bent segment 214.

[0108] Wherein, along the circumferential direction of the stator, the bending directions of the first bending section 213 and the second bending section 214 are opposite.

[0109] In the embodiment of the present application, the first straight segment 211 and the second straight segment 212 of the flat wire conductor 21 are inserted into the receiving groove of the iron core 1, and both ends of the first straight segment 211 and the second straight segment 212 along the axial direction of the stator can extend out of the receiving groove, the first straight segment 211 and the second straight segment 212 are located on the same side. One end is connected by the main body 215, the other end of the first straight segment 211 is connected to the first bending segment 213, and the other end of the second straight segment 212 is connected to the second bending segment 214. When the flat wire conductor 21 is located at the beginning of each branch of each phase winding, the other end of the first bending segment 213 is connected to the power supply, and the other end of the second bending segment 214 is connected to the first bending segment 213 of the adjacent flat wire conductor 21; when the flat wire conductor 21 is located at the end of each branch of each phase winding, the other end of the first bending segment 213 is connected to the second bending segment 214 of the adjacent flat wire conductor 21, and the other end of the second bending segment 214 is connected to the second bending segment 214 of the flat wire conductor 21 at the end of the adjacent branch, so that the current can flow evenly to the first straight segment 211 and the second straight segment 212 of each flat wire conductor 21 to generate a stable and uniform magnetic field, thereby ensuring the stability and reliability of the flat wire motor during operation.

[0110] Specifically, by setting the first bending section 213 and the second bending section 214 to have opposite bending directions along the circumference of the stator, it is not only beneficial to shorten the distance between two adjacent flat wire conductors 21 and reduce the length of each connecting piece for welding, but also beneficial to shorten the length of the first bending section 213 and the second bending section 214 extending out of the accommodating slot along the axial direction of the stator, so as to increase the heat dissipation area and improve the heat dissipation efficiency while reducing the size of the stator, so as to reduce the space occupied by the stator and improve space utilization.

[0111] The bending sections are connected by connecting pieces, and the bending sections and connecting pieces are fixedly connected by welding to improve the stability and reliability of the connection between the phase windings.

[0112] In a specific embodiment, Figure 3 As shown, the number of accommodating slots is S, and S is 48; the number of poles of the flat wire motor is P, and P is 8; the number of phases of the flat wire motor is M, and M is 3; the number of accommodating slots corresponding to each pole of the flat wire motor is N, and N is 2.

[0113] The first receiving groove 11 includes a first plug-in area 13, a second plug-in area 14, a third plug-in area 15, a fourth plug-in area 16 and a fifth plug-in area 17, and the first plug-in area 13, the second plug-in area 14, the third plug-in area 15, the fourth plug-in area 16 and the fifth plug-in area 17 are arranged in sequence along the direction from the axis of the stator to the edge.

[0114] The second receiving groove 12 includes a first plug-in area 13, a second plug-in area 14, a third plug-in area 15, a fourth plug-in area 16, a fifth plug-in area 17 and a sixth plug-in area 18, and the first plug-in area 13, the second plug-in area 14, the third plug-in area 15, the fourth plug-in area 16, the fifth plug-in area 17 and the sixth plug-in area 18 are arranged in sequence along the direction from the axis of the stator toward the edge.

[0115] Among them, the first plug-in area 13 is a, the second plug-in area 14 is b, the third plug-in area 15 is c, the fourth plug-in area 16 is d, the fifth plug-in area 17 is e, and the sixth plug-in area 18 is f.

[0116] In the embodiment of the present application, the flat wire motor has 48 slots, 8 poles and 2 branches, the 48 receiving slots are spaced apart along the axial direction of the stator, and each receiving slot is provided with a plurality of plug-in areas. During the assembly process of the winding 2 and the iron core 1, the first straight segment 211 and the second straight segment 212 of the flat wire conductor 21 are respectively inserted into the plug-in areas of different receiving slots, and the two plug-in areas can be in the same layer or in different layers.

[0117] Among them, the number of the first accommodating slots 11 and the number of the second accommodating slots 12 are both 24, so that the two numbers are equal, and since the first accommodating slots 11 and the second accommodating slots 12 are alternately distributed along the axial intervals of the stator, it is beneficial to further improve the uniformity of the distribution of the winding 2 on the core 1, so that the resistance and inductance of each branch in each phase winding are balanced, and the back electromotive force of each branch is the same, so as to eliminate the phase difference and voltage difference between different branches, and then make the current between each branch balanced, without circulating current, which is beneficial to optimize the spatial harmonics of the flat wire motor and improve the NVH performance of the flat wire motor.

[0118] In a specific embodiment, the head end of the first branch of the U-phase winding starts from the first receiving slot 11, and the head end of the second branch of the U-phase winding starts from the second receiving slot 12;

[0119] The connection method of the first branch of the U-phase winding is:

[0120] The flat wire conductor 21 is inserted into 9a and 15b, 21c and 27d, 33e and 39f, 45f and 39e, 33d and 27c, 21b and 15a, 22a and 28b, 34c and 40d, 46e and 4e, 46d and 40c, 34b and 28a, 33a and 39b, 45c and 3d, 9e and 15f, 21f and 15e, 9d and 3c, 45b and 39a, 46a and 4b, 10c and 16d, 22e and 28e, 22d and 16c, 10b and 4a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0121] Specifically, in the first branch of the U-phase winding, the first plug-in area 13 (15a) of the 15th slot and the first plug-in area 13 (22a) of the 22nd slot are connected to two adjacent flat wire conductors 21 through a third connecting piece, the first plug-in area 13 (28a) of the 28th slot and the first plug-in area 13 (33a) of the 33rd slot are connected to two adjacent flat wire conductors 21 through a first connecting piece, the first plug-in area 13 (39a) of the 39th slot and the first plug-in area 13 (46a) of the 46th slot are connected to two adjacent flat wire conductors 21 through a third connecting piece, and the remaining flat wire conductors 21 are connected through a second connecting piece.

[0122] Among them, the flat wire conductor 21 inserted into the first plug-in area 13 (9a) of the 9th slot and the second plug-in area 14 (15b) of the 15th slot is the flat wire conductor 21 located at the beginning of the first branch of the U-phase winding, and the flat wire conductor 21 inserted into the second plug-in area 14 (10b) of the 10th slot and the first plug-in area 13 (4a) of the 4th slot is the flat wire conductor 21 located at the end of the first branch of the U-phase winding. The current flows into the first plug-in area 13 (9a) of the 9th slot and flows out of the first plug-in area 13 (4a) of the 4th slot.

[0123] It should be noted that the first plug-in area 13 (9a) of the 9th slot to the first plug-in area 13 (15a) of the 15th slot is the first coil unit, the first plug-in area 13 (22a) of the 22nd slot to the first plug-in area 13 (28a) of the 28th slot is the second coil unit, the first plug-in area 12 (33a) of the 33rd slot to the first plug-in area 13 (39a) of the 39th slot is the third coil unit, and the first plug-in area 13 (46a) of the 46th slot to the first plug-in area 13 (4a) of the 4th slot is the fourth coil unit.

[0124] The connection method of the second branch of the U-phase winding is:

[0125] The flat wire conductor 21 is inserted into 10a and 16b, 22c and 28d, 34e and 40e, 34d and 28c, 22b and 16a, 21a and 27b, 33c and 39d, 45e and 3f, 9f and 3e, 45d and 39c, 33b and 27a, 34a and 40b, 46c and 4d, 10e and 16e, 10d and 4c, 46b and 40a, 45a and 3b, 9c and 15d, 21e and 27f, 33f and 27e, 21d and 15c, 9b and 3a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0126] Specifically, in the second branch of the U-phase winding, the first plug-in area 13 (16a) of the 16th slot is connected to the first plug-in area 13 (21a) of the 21st slot by a first connecting piece, the first plug-in area 13 (27a) of the 27th slot is connected to the first plug-in area 13 (34a) of the 34th slot by a third connecting piece, the first plug-in area 13 (40a) of the 40th slot is connected to the first plug-in area 13 (45a) of the 45th slot by a first connecting piece, and the remaining flat wire conductors 21 are connected by a second connecting piece.

[0127] Among them, the flat wire conductor 21 inserted into the first plug-in area 13 (10a) of the 10th slot and the second plug-in area 14 (16b) of the 16th slot is the flat wire conductor 21 located at the beginning of the second branch of the U-phase winding, and the flat wire conductor 21 inserted into the second plug-in area 14 (9b) of the 9th slot and the first plug-in area 13 (3a) of the 3rd slot is the flat wire conductor 21 located at the end of the second branch of the U-phase winding. The current flows into the first plug-in area 13 (10a) of the 10th slot and flows out of the first plug-in area 13 (3a) of the 3rd slot.

[0128] It should be noted that the first plug-in area 13 (10a) of the 10th slot to the first plug-in area 13 (16a) of the 16th slot is the first coil unit, the first plug-in area 13 (21a) of the 21st slot to the first plug-in area 13 (27a) of the 27th slot is the second coil unit, the first plug-in area 12 (34a) of the 34th slot to the first plug-in area 13 (40a) of the 40th slot is the third coil unit, and the first plug-in area 13 (45a) of the 45th slot to the first plug-in area 13 (3a) of the 3rd slot is the fourth coil unit.

[0129] In a specific embodiment, the first end of the first branch of the V-phase winding starts from the first receiving slot 11, and the first end of the second branch of the V-phase winding starts from the second receiving slot 12;

[0130] The connection method of the first branch of the V-phase winding is:

[0131] The flat wire conductor 21 is inserted into 13a and 19b, 25c and 31d, 37e and 43f, 1f and 43e, 37d and 31c, 25b and 19a, 26a and 32b, 38c and 44d, 2e and 8e, 2d and 44c, 38b and 32a, 37a and 43b, 1c and 7d, 13e and 19f, 25f and 19e, 13d and 7c, 1b and 43a, 2a and 8b, 14c and 20d, 26e and 32e, 26d and 20c, and 14b and 8a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0132] Specifically, in the first branch of the V-phase winding, the first plug-in area 13 (19a) of the 19th slot is connected to the first plug-in area 13 (26a) of the 26th slot by a third connecting piece, the first plug-in area 13 (32a) of the 32nd slot is connected to the first plug-in area 13 (37a) of the 37th slot by a first connecting piece, the first plug-in area 13 (43a) of the 43rd slot is connected to the first plug-in area 13 (2a) of the 2nd slot by a third connecting piece, and the remaining flat wire conductors 21 are connected by a second connecting piece.

[0133] Among them, the flat wire conductor 21 inserted into the first plug-in area 13 (13a) of the 13th slot and the second plug-in area 14 (19b) of the 19th slot is the flat wire conductor 21 located at the beginning of the first branch of the V-phase winding, and the flat wire conductor 21 inserted into the second plug-in area 14 (14b) of the 14th slot and the first plug-in area 13 (8a) of the 8th slot is the flat wire conductor 21 located at the end of the first branch of the V-phase winding. The current flows into the first plug-in area 13 (13a) of the 13th slot and flows out of the first plug-in area 13 (8a) of the 8th slot.

[0134] It should be noted that the first plug-in area 13 (13a) of the 13th slot to the first plug-in area 13 (19a) of the 19th slot is the first coil unit, the first plug-in area 13 (26a) of the 26th slot to the first plug-in area 13 (32a) of the 32nd slot is the second coil unit, the first plug-in area 12 (37a) of the 37th slot to the first plug-in area 13 (43a) of the 43rd slot is the third coil unit, and the first plug-in area 13 (2a) of the 2nd slot to the first plug-in area 13 (8a) of the 8th slot is the fourth coil unit.

[0135] The connection method of the second branch of the V-phase winding is:

[0136] The flat wire conductor 21 is inserted into 14a and 20b, 26c and 32d, 38e and 44e, 38d and 32c, 26b and 20a, 25a and 31b, 37c and 43d, 1e and 7f, 13f and 7e, 1d and 43c, 37b and 31a, 38a and 44b, 2c and 8d, 14e and 20e, 14d and 8c, 2b and 44a, 1a and 7b, 13c and 19d, 25e and 31f, 37f and 31e, 25d and 19c, 13b and 7a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0137] Specifically, in the second branch of the V-phase winding, the first plug-in area 13 (20a) of the 20th slot is connected to the first plug-in area 13 (25a) of the 25th slot by a first connector to connect two adjacent flat wire conductors 21, the first plug-in area 13 (31a) of the 31st slot is connected to the first plug-in area 13 (38a) of the 38th slot by a third connector to connect two adjacent flat wire conductors 21, the first plug-in area 13 (44a) of the 44th slot is connected to the first plug-in area 13 (1a) of the 1st slot by a first connector to connect two adjacent flat wire conductors 21, and the remaining flat wire conductors 21 are connected by a second connector.

[0138] Among them, the flat wire conductor 21 inserted into the first plug-in area 13 (14a) of the 14th slot and the second plug-in area 14 (20b) of the 20th slot is the flat wire conductor 21 located at the beginning of the second branch of the V-phase winding, and the flat wire conductor 21 inserted into the second plug-in area 14 (13b) of the 13th slot and the first plug-in area 13 (7a) of the 7th slot is the flat wire conductor 21 located at the end of the second branch of the V-phase winding. The current flows into the first plug-in area 13 (14a) of the 14th slot and flows out of the first plug-in area 13 (7a) of the 7th slot.

[0139] It should be noted that the first plug-in area 13 (14a) of the 14th slot to the first plug-in area 13 (20a) of the 20th slot is the first coil unit, the first plug-in area 13 (25a) of the 25th slot to the first plug-in area 13 (31a) of the 31st slot is the second coil unit, the first plug-in area 12 (38a) of the 38th slot to the first plug-in area 13 (44a) of the 44th slot is the third coil unit, and the first plug-in area 13 (1a) of the 1st slot to the first plug-in area 13 (7a) of the 7th slot is the fourth coil unit.

[0140] In a specific embodiment, the first end of the first branch of the W-phase winding starts from the first receiving slot 11, and the first end of the second branch of the W-phase winding starts from the second receiving slot 12;

[0141] The connection method of the first branch of the W phase winding is:

[0142] The flat wire conductor 21 is inserted into 17a and 23b, 29c and 35d, 41e and 47f, 5f and 47e, 41d and 35c, 29b and 23a, 30a and 36b, 42c and 48d, 6e and 12e, 6d and 48c, 42b and 36a, 41a and 47b, 5c and 11d, 17e and 23f, 29f and 23e, 17d and 11c, 5b and 47a, 6a and 12b, 18c and 24d, 30e and 36e, 30d and 24c, 18b and 12a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0143] Specifically, in the first branch of the W-phase winding, two adjacent flat wire conductors 21 are connected between the first plug-in area 13 (17a) of the 17th slot and the first plug-in area 13 (23a) of the 23rd slot via a third connector, two adjacent flat wire conductors 21 are connected between the first plug-in area 13 (36a) of the 36th slot and the first plug-in area 13 (41a) of the 41st slot via a first connector, two adjacent flat wire conductors 21 are connected between the first plug-in area 13 (47a) of the 47th slot and the first plug-in area 13 (6a) of the 6th slot via a third connector, and the remaining flat wire conductors 21 are connected via a second connector.

[0144] Among them, the flat wire conductor 21 inserted into the first plug-in area 13 (17a) of the 17th slot and the second plug-in area 14 (23b) of the 23rd slot is the flat wire conductor 21 located at the beginning of the first branch of the W-phase winding, and the flat wire conductor 21 inserted into the second plug-in area 14 (18b) of the 18th slot and the first plug-in area 13 (12a) of the 12th slot is the flat wire conductor 21 located at the end of the first branch of the W-phase winding. The current flows into the first plug-in area 13 (17a) of the 17th slot and flows out of the first plug-in area 13 (12a) of the 12th slot.

[0145] It should be noted that the first plug-in area 13 (17a) of the 17th slot to the first plug-in area 13 (23a) of the 23rd slot is the first coil unit, the first plug-in area 13 (30a) of the 30th slot to the first plug-in area 13 (36a) of the 36th slot is the second coil unit, the first plug-in area 12 (41a) of the 41st slot to the first plug-in area 13 (47a) of the 47th slot is the third coil unit, and the first plug-in area 13 (6a) of the 6th slot to the first plug-in area 13 (12a) of the 12th slot is the fourth coil unit.

[0146] The connection method of the second branch of the W phase winding is:

[0147] The flat wire conductor 21 is inserted into 18a and 24b, 30c and 36d, 42e and 48e, 42d and 36c, 30b and 24a, 29a and 35b, 41c and 47d, 5e and 11f, 17f and 11e, 5d and 47c, 41b and 35a, 42a and 48b, 6c and 12d, 18e and 24e, 18d and 12c, 6b and 48a, 5a and 11b, 17c and 23d, 29e and 35f, 41f and 35e, 29d and 23c, 17b and 11a in sequence, and two adjacent flat wire conductors are connected by different connecting parts.

[0148] Specifically, in the second branch of the W-phase winding, the first plug-in area 13 (24a) of the 24th slot is connected to the first plug-in area 13 (29a) of the 29th slot by a first connecting piece, the first plug-in area 13 (35a) of the 35th slot is connected to the first plug-in area 13 (42a) of the 42nd slot by a third connecting piece, the first plug-in area 13 (48a) of the 48th slot is connected to the first plug-in area 13 (5a) of the 5th slot by a first connecting piece, and the remaining flat wire conductors 21 are connected by a second connecting piece.

[0149] Among them, the flat wire conductor 21 inserted into the first plug-in area 13 (18a) of the 18th slot and the second plug-in area 14 (24b) of the 24th slot is the flat wire conductor 21 located at the beginning of the second branch of the W-phase winding, and the flat wire conductor 21 inserted into the second plug-in area 14 (17b) of the 17th slot and the first plug-in area 13 (11a) of the 11th slot is the flat wire conductor 21 located at the end of the second branch of the W-phase winding. The current flows into the first plug-in area 13 (18a) of the 18th slot and flows out of the first plug-in area 13 (11a) of the 11th slot.

[0150] It should be noted that the first plug-in area 13 (18a) of the 18th slot to the first plug-in area 13 (24a) of the 24th slot is the first coil unit, the first plug-in area 13 (29a) of the 29th slot to the first plug-in area 13 (35a) of the 35th slot is the second coil unit, the first plug-in area 12 (42a) of the 42nd slot to the first plug-in area 13 (48a) of the 48th slot is the third coil unit, and the first plug-in area 13 (5a) of the 5th slot to the first plug-in area 13 (11a) of the 11th slot is the fourth coil unit.

[0151] An embodiment of the present application further provides a flat wire motor, which includes a stator and a rotor. The stator is any of the stators described above, wherein the rotor is coaxially arranged with the stator, and the rotor can rotate relative to the stator along its axial direction.

[0152] In the embodiment of the present application, the rotor and the stator are coaxially arranged. When current is input to the flat wire motor, the stator can generate a magnetic field to drive the rotor to rotate along its axial direction, thereby converting electrical energy into mechanical energy output through the flat wire motor. Figure 5 As shown, during the operation of the flat wire motor, since the flat wire motor provided by the present application can accommodate more flat wire conductors 21, the flat wire motor provided by the present application can have a higher output torque, so that it has better working performance and is more in line with actual usage requirements.

[0153] An embodiment of the present application further provides a stator assembly method, which is used to assemble the stator described in any one of the above items. The stator assembly method includes:

[0154] Insert the first portion of the flat wire conductor into each receiving slot in sequence along the first direction, and stop after one end of the first portion of the flat wire conductor is inserted into the insertion area of ​​the receiving slot, wherein the insertion area is located on the side of the receiving slot farthest from the stator axis along the direction of the stator axis toward the edge.

[0155] Insert the second portion of the flat wire conductor into each receiving slot in sequence along the second direction, and stop when one end of the second portion of the flat wire conductor is inserted into the insertion area of ​​the receiving slot, wherein the insertion area is located on the side of the receiving slot closest to the stator axis along the direction of the stator axis toward the edge.

[0156] The process is repeated for a preset number of times and then stopped to form a first branch or a second branch of any winding.

[0157] The first direction is opposite to the second direction.

[0158] In the embodiment of the present application, the flat wire conductor 21 is divided into a first portion of flat wire conductors and a second portion of flat wire conductors.

[0159] During the assembly process of the winding 2 and the core 1, if the first part of the flat wire conductor is inserted in sequence along the first direction starting from the first plug-in area 13 of the first receiving slot 11, since the plug-in areas in the first receiving slot 11 are even, one end of the first part of the flat wire conductor is inserted into any sixth plug-in area 18 and then stops, and the second part of the flat wire conductor is inserted in sequence along the second direction starting from the sixth plug-in area 18 of another first receiving slot 11 until one end of the second part of the flat wire conductor is inserted into any first plug-in area 13 and then stops.

[0160] Taking the connection method of the first branch of the U-phase winding as an example, when the 9th slot is the first accommodating slot 11 and the 22nd slot is the second accommodating slot 12.

[0161] The first part of the flat wire conductor is inserted into the first plug-in area 13 (9a) of the 9th slot, the second plug-in area 14 (15b) of the 15th slot, the third plug-in area 15 (21c) of the 21st slot, the fourth plug-in area 16 (27d) of the 27th slot, the fifth plug-in area 17 (33e) of the 33rd slot and the sixth plug-in area 18 (39f) of the 39th slot in sequence along the first direction and then stops, wherein, along the direction of the stator axis toward the edge, the sixth plug-in area 18 (39f) of the 39th slot is the plug-in area of ​​the 39th slot farthest from the stator axis.

[0162] Then, the second part of the flat wire conductor is inserted into the sixth plug-in area 18 (45f) of the 45th slot, the fifth plug-in area 17 (39e) of the 39th slot, the fourth plug-in area 16 (33d) of the 33rd slot, the third plug-in area 15 (27c) of the 27th slot, the second plug-in area 14 (21b) of the 21st slot, and the first plug-in area 13 (15a) of the 15th slot in sequence along the second direction and then stops, wherein, along the direction from the stator axis toward the edge, the first plug-in area 13 (15a) of the 15th slot is the plug-in area of ​​the 15th slot closest to the stator axis.

[0163] Repeat the above steps to insert one end of the flat wire conductor 21 into the plug-in area farthest from the stator axis in any receiving slot and then reverse, so that the winding 2 can be evenly distributed on the core 1, so that the resistance and inductance of each branch in each phase winding are balanced, and the back electromotive force of each branch is the same, so as to eliminate the phase difference and voltage difference between different branches, and then make the current between each branch balanced without circulating current, which is beneficial to optimize the spatial harmonics of the flat wire motor and improve the NVH performance of the flat wire motor.

[0164] The first direction may be a clockwise direction, and the second direction may be a counterclockwise direction.

[0165] In a specific embodiment, after the first portion of the flat wire conductor is sequentially inserted into each receiving groove along the first direction and one end of the first portion of the flat wire conductor is inserted into the plug-in area of ​​the receiving groove and then stopped, the assembly method includes:

[0166] Insert the other end of the first part of the flat wire conductor inserted into the plug-in area of ​​the receiving slot along the tangential direction of the stator into the plug-in area of ​​another receiving slot, wherein the two plug-in areas are located on the side of each receiving slot farthest from the stator axis along the direction from the stator axis toward the edge.

[0167] In the embodiment of the present application, during the assembly of the winding 2 and the core 1, if the first part of the flat wire conductor is sequentially plugged in starting from the first plug-in area 13 of the second accommodating slot 12, since the plug-in areas in the second accommodating slot 12 are odd in number, after one end of the first part of the flat wire conductor is inserted into any fifth plug-in area 17, it is necessary to plug in along the tangential direction of the stator so that the other end of the first part of the flat wire conductor is inserted into the fifth plug-in area 17 of another second accommodating slot 12 to avoid the other end of the first part of the flat wire conductor being in a suspended state, so that the wiring method of the flat wire conductor 21 is more flexible, which is beneficial to improving the tightness of the winding 2 and the core 1 to ensure the working performance of the flat wire motor.

[0168] Taking the connection method of the first branch of the U-phase winding as an example, when the 9th slot is the first accommodating slot 11 and the 22nd slot is the second accommodating slot 12.

[0169] Insert the first part of the flat wire conductor into the first plug-in area 13 (22a) of the 22nd slot, the second plug-in area 14 (28b) of the 28th slot, the third plug-in area 15 (34c) of the 34th slot, the fourth plug-in area 16 (40d) of the 40th slot, and the fifth plug-in area 17 (46e) of the 46th slot in sequence along the first direction and stop, wherein, along the direction of the stator axis toward the edge, the fifth plug-in area 17 (46e) of the 46th slot is the plug-in area of ​​the 46th slot farthest from the stator axis. At the same time, the other end of the first part of the flat wire conductor inserted into the fifth plug-in area 17 (46e) of the 46th slot is inserted into the fifth plug-in area 17 (4e) of the 4th slot along the tangential direction of the stator, so that the second part of the flat wire conductor can continue to be inserted into the fourth plug-in area 16 (46d) of the 46th slot, the third plug-in area 15 (40c) of the 40th slot, the second plug-in area 14 (34b) of the 34th slot and the first plug-in area 13 (28a) of the 28th slot in sequence along the second direction and then stop.

[0170] The above describes in detail the structure, features and effects of the present application based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present application, but the present application does not limit the scope of implementation to what is shown in the drawings. Any changes made in accordance with the concept of the present application, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present application.

Claims

1. A stator for a flat wire motor, characterized in that: The stator comprises: An iron core, wherein the iron core is provided with a plurality of accommodating grooves, the plurality of accommodating grooves are distributed at intervals along the circumferential direction of the stator and penetrate the iron core along the axial direction of the stator; A winding, wherein the winding comprises a plurality of flat wire conductors, the plurality of flat wire conductors are inserted into a plurality of the receiving slots, and both ends of each of the flat wire conductors extend out of the receiving slot along the axial direction of the stator relative to the iron core; Wherein, the accommodating groove includes at least a first accommodating groove and a second accommodating groove, the first accommodating groove and the second accommodating groove are alternately arranged along the circumference of the stator, and along the direction of the stator axis toward the edge, the depth of the first accommodating groove is H1, the depth of the second accommodating groove is H2, and H1 and H2 satisfy H1>H2.

2. The stator according to claim 1, characterized in that: The first receiving slot and the second receiving slot are both provided with multi-layer plug-in areas, the number of the plug-in areas in the first receiving slot is X, the number of the plug-in areas in the second receiving slot is Y, and X and Y satisfy XY≥1.

3. The stator according to claim 1, characterized in that: The windings include a U-phase winding, a V-phase winding and a W-phase winding, and each phase winding includes a first branch and a second branch, and the first branch and the second branch are arranged in parallel; Each branch includes a first coil unit, a second coil unit, a third coil unit and a fourth coil unit. The first coil unit, the second coil unit, the third coil unit and the fourth coil unit are distributed along the circumferential direction of the stator and are connected to two adjacent coil units in sequence end to end. The head end of each of the first coil units is connected to a power supply, and the ends of each of the fourth coil units are connected to each other.

4. The stator according to claim 3, characterized in that: The winding further includes a plurality of first connecting members, a plurality of second connecting members, a plurality of third connecting members and a plurality of the flat wire conductors. Along the circumferential direction of the stator, the flat wire conductors are connected by different connecting members to form the first branch and the second branch. In the first branch, the end of the first coil unit and the head end of the second coil unit are connected via the third connecting member, the end of the second coil unit and the head end of the third coil unit are connected via the first connecting member, and the end of the third coil unit and the head end of the fourth coil unit are connected via the third connecting member; In the second branch, the end of the first coil unit and the head end of the second coil unit are connected via the first connecting member, the end of the second coil unit and the head end of the third coil unit are connected via the third connecting member, and the end of the third coil unit and the head end of the fourth coil unit are connected via the first connecting member; The length of the first connecting member is L1, the length of the second connecting member is L2, and the length of the third connecting member is L3, and L1, L2 and L3 meet the following conditions: L3>L2, L3>L1, L2>L1.

5. The stator according to claim 4, characterized in that: The flat wire conductor comprises a first straight segment, a second straight segment, a first bent segment, a second bent segment and a body, two ends of the body are respectively connected to one end of the first straight segment and one end of the second straight segment, the other end of the first straight segment is connected to the first bent segment, and the other end of the second straight segment is connected to the second bent segment; Along the circumference of the stator, the bending directions of the first bending segment and the second bending segment are opposite.

6. The stator according to any one of claims 1 to 5, characterized in that: The number of the accommodating slots is S, and S is 48; the number of poles of the flat wire motor is P, and P is 8; the number of phases of the flat wire motor is M, and M is 3; the number of the accommodating slots corresponding to each pole of the flat wire motor is N, and N is 2; The first receiving slot includes a first plug-in area, a second plug-in area, a third plug-in area, a fourth plug-in area and a fifth plug-in area, and the first plug-in area, the second plug-in area, the third plug-in area, the fourth plug-in area and the fifth plug-in area are arranged in sequence along the direction from the axis of the stator to the edge; The second receiving slot includes a first plug-in area, a second plug-in area, a third plug-in area, a fourth plug-in area, a fifth plug-in area and a sixth plug-in area, wherein the first plug-in area, the second plug-in area, the third plug-in area, the fourth plug-in area, the fifth plug-in area and the sixth plug-in area are sequentially arranged along the direction from the axis of the stator to the edge; Among them, the first plug-in area is a, the second plug-in area is b, the third plug-in area is c, the fourth plug-in area is d, the fifth plug-in area is e, and the sixth plug-in area is f.

7. The stator according to claim 6, characterized in that The winding includes a U-phase winding, the first end of a first branch of the U-phase winding starts from the first containing slot, and the first end of a second branch of the U-phase winding starts from the second containing slot; The connection mode of the first branch of the U-phase winding is: The flat wire conductors are sequentially inserted into 9a and 15b, 21c and 27d, 33e and 39f, 45f and 39e, 33d and 27c, 21b and 15a, 22a and 28b, 34c and 40d, 46e and 4e, 46d and 40c, 34b and 28a, 33a and 39b, 45c and 3d, 9e and 15f, 21f and 15e, 9d and 3c, 45b and 39a, 46a and 4b, 10c and 16d, 22e and 28e, 22d and 16c, 10b and 4a, and two adjacent flat wire conductors are connected by different connectors; Among them, 9a to 15a are the first coil units, 22a to 28a are the second coil units, 33a to 39a are the third coil units, and 46a to 4a are the fourth coil units; The connection mode of the second branch of the U-phase winding is: The flat wire conductors are sequentially inserted into 10a and 16b, 22c and 28d, 34e and 40e, 34d and 28c, 22b and 16a, 21a and 27b, 33c and 39d, 45e and 3f, 9f and 3e, 45d and 39c, 33b and 27a, 34a and 40b, 46c and 4d, 10e and 16e, 10d and 4c, 46b and 40a, 45a and 3b, 9c and 15d, 21e and 27f, 33f and 27e, 21d and 15c, 9b and 3a, and two adjacent flat wire conductors are connected by different connectors; Among them, 10a to 16a are the first coil units, 21a to 27a are the second coil units, 34a to 40a are the third coil units, and 45a to 3a are the fourth coil units.

8. The stator according to claim 6, characterized in that: The winding includes a V-phase winding, the first end of a first branch of the V-phase winding starts from the first containing slot, and the first end of a second branch of the V-phase winding starts from the second containing slot; The connection mode of the first branch of the V-phase winding is: The flat wire conductors are sequentially inserted into 13a and 19b, 25c and 31d, 37e and 43f, 1f and 43e, 37d and 31c, 25b and 19a, 26a and 32b, 38c and 44d, 2e and 8e, 2d and 44c, 38b and 32a, 37a and 43b, 1c and 7d, 13e and 19f, 25f and 19e, 13d and 7c, 1b and 43a, 2a and 8b, 14c and 20d, 26e and 32e, 26d and 20c, and 14b and 8a, and two adjacent flat wire conductors are connected by different connectors; Among them, 13a to 19a are the first coil units, 26a to 32a are the second coil units, 37a to 43a are the third coil units, and 2a to 8a are the fourth coil units; The connection mode of the second branch of the V-phase winding is: The flat wire conductors are sequentially inserted into 14a and 20b, 26c and 32d, 38e and 44e, 38d and 32c, 26b and 20a, 25a and 31b, 37c and 43d, 1e and 7f, 13f and 7e, 1d and 43c, 37b and 31a, 38a and 44b, 2c and 8d, 14e and 20e, 14d and 8c, 2b and 44a, 1a and 7b, 13c and 19d, 25e and 31f, 37f and 31e, 25d and 19c, 13b and 7a, and two adjacent flat wire conductors are connected by different connectors; Among them, 14a to 20a are the first coil units, 25a to 31a are the second coil units, 38a to 44a are the third coil units, and 1a to 7a are the fourth coil units.

9. The stator according to claim 6, characterized in that: The winding includes a W-phase winding, the first end of a first branch of the W-phase winding starts from the first containing slot, and the first end of a second branch of the W-phase winding starts from the second containing slot; The connection mode of the first branch of the W-phase winding is: The flat wire conductors are sequentially inserted into 17a and 23b, 29c and 35d, 41e and 47f, 5f and 47e, 41d and 35c, 29b and 23a, 30a and 36b, 42c and 48d, 6e and 12e, 6d and 48c, 42b and 36a, 41a and 47b, 5c and 11d, 17e and 23f, 29f and 23e, 17d and 11c, 5b and 47a, 6a and 12b, 18c and 24d, 30e and 36e, 30d and 24c, 18b and 12a, and two adjacent flat wire conductors are connected by different connectors; Among them, 17a to 23a are the first coil units, 30a to 36a are the second coil units, 41a to 47a are the third coil units, and 6a to 12a are the fourth coil units; The connection mode of the second branch of the W-phase winding is: The flat wire conductors are sequentially inserted into 18a and 24b, 30c and 36d, 42e and 48e, 42d and 36c, 30b and 24a, 29a and 35b, 41c and 47d, 5e and 11f, 17f and 11e, 5d and 47c, 41b and 35a, 42a and 48b, 6c and 12d, 18e and 24e, 18d and 12c, 6b and 48a, 5a and 11b, 17c and 23d, 29e and 35f, 41f and 35e, 29d and 23c, 17b and 11a, and two adjacent flat wire conductors are connected by different connectors; Among them, 18a to 24a are the first coil units, 29a to 35a are the second coil units, 42a to 48a are the third coil units, and 5a to 11a are the fourth coil units.

10. A flat wire motor, characterized in that: The flat wire motor comprises: Rotor; A stator, wherein the stator is the stator according to any one of claims 1 to 9; The rotor is coaxially arranged with the stator, and the rotor can rotate relative to the stator along its axial direction.

11. A method for assembling a stator, used for assembling a stator as claimed in any one of claims 1 to 9, characterized in that: The assembly method comprises: Inserting the first portion of the flat wire conductor into each of the receiving slots in sequence along the first direction, and stopping after one end of the first portion of the flat wire conductor is inserted into the insertion area of ​​the receiving slot, wherein the insertion area is located on the side of the receiving slot farthest from the stator axis along the direction from the stator axis to the edge; Inserting the second portion of the flat wire conductor into each of the receiving grooves in sequence along the second direction, and stopping after one end of the second portion of the flat wire conductor is inserted into the insertion area of ​​the receiving groove, wherein the insertion area is located on the side of the receiving groove closest to the stator axis along the direction from the stator axis toward the edge; and stopping after repeating a preset number of times to form a first branch or a second branch of the winding; The first direction is opposite to the second direction.

12. The assembly method according to claim 11, characterized in that: After the first portion of the flat wire conductor is sequentially inserted into each of the receiving grooves along the first direction and one end of the first portion of the flat wire conductor is inserted into the insertion area of ​​the receiving groove and then stops, the assembly method further includes: Insert the other end of the first portion of the flat wire conductor, one end of which is inserted into the plug-in area, into the plug-in area of ​​another accommodating slot along the tangential direction of the stator, wherein, along the direction of the stator axis toward the edge, the two plug-in areas are located on the side of each accommodating slot that is farthest from the stator axis.

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