Stator of flat wire motor and flat wire motor

Abstract

The utility model provides a stator of a flat wire motor and the flat wire motor. According to the flat wire motor, the sub-conductors with the pre-formed bending welding parts are inserted into the corresponding stator slots, so that the problem that the gap between the two adjacent bending welding parts is too large can be avoided, the contact area of the two adjacent bending welding parts can be guaranteed, the subsequent welding process is facilitated, the welding quality is guaranteed, and the working stability of the flat wire motor is guaranteed. And moreover, the bending welding part is formed in advance, so that the bending angle of the bending welding part is conveniently and accurately controlled. According to the flat wire winding, clamping sections can be prevented from being reserved at the legs of the sub-conductors, the axial height of the flat wire winding can be reduced, the copper loss of the flat wire motor can be reduced, and the efficiency of the flat wire motor can be improved.

Description

[0001] Citation of Related Applications

[0002] This utility model claims the priority of the invention patent application entitled “STATOR CORE” and application number CN202410060287.0 filed in China on January 16, 2024. The entire contents of the above prior application are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of motor manufacturing, and in particular to a stator of a flat wire motor and a manufacturing method thereof, and a flat wire motor. Background Art

[0004] For the existing flat wire motor, the stator winding is formed by a plurality of hairpin coils in a certain arrangement.

[0005] In the manufacturing process of the existing flat wire motor, each hairpin coil needs to be individually inserted into the stator slot along the axial direction of the stator core, and then formed through processes such as flaring and twisting, and then the welding legs of all the hairpin coils are welded together.

[0006] The hairpin coil is mostly made of copper. At present, the hairpin coil will rebound to a certain extent after twisting, resulting in a large gap between two adjacent welding legs. Due to the fact that the hairpin coil has been inserted into the stator slot, it is difficult to continue twisting the twisted hairpin coil again using the existing twisting mechanism. This makes it inconvenient to carry out the subsequent welding process, and the welding quality is difficult to guarantee, which is prone to the problem of cold welding, affecting the reliability of the flat wire motor. Utility Model Content

[0007] The purpose of the present application is to overcome or at least alleviate the deficiencies of the above-mentioned prior art and to provide a stator of a flat wire motor and a flat wire motor.

[0008] According to a first aspect of the present application, a stator of a flat wire motor is provided, comprising a stator core and a flat wire winding, wherein the stator core comprises: an annular yoke and an inner ring member sleeved in the annular yoke; an outer peripheral portion of the inner ring member comprises a plurality of teeth arranged at intervals along the circumferential direction, and a stator slot is formed between any two adjacent teeth;

[0009] Each phase winding of the flat wire winding includes multiple sub-conductors, each sub-conductor includes at least two legs and a bent portion connecting two adjacent legs; the leg of each sub-conductor includes a bent welding portion welded to the adjacent sub-conductor, and the bent welding portion is formed before the sub-conductor is inserted into the stator slot, and the leg of the sub-conductor can extend radially into the stator slot from the radial notch of the stator slot.

[0010] In at least one embodiment, the annular yoke includes at least two arc-shaped yokes spliced ​​together in the circumferential direction.

[0011] In at least one embodiment, the inner peripheral portion of the arc-shaped yoke includes a plurality of circumferentially spaced pressing blocks, each of the stator slots is inserted with a pressing block, and the pressing block contacts the radially outermost leg portion in the stator slot.

[0012] In at least one embodiment, along the circumference of the stator, the side surface of the pressing block contacts the slot wall of the stator slot, and the side surface of the leg portion contacts the slot wall of the stator slot.

[0013] In at least one embodiment, along the radial direction of the stator, side surfaces of two adjacent legs are in contact and engaged with each other.

[0014] In at least one embodiment, along the radial direction of the stator, the sum of the thickness of all legs to be embedded in the same stator slot and the thickness of the pressing block is greater than the depth of the stator slot; after the pressing block is inserted into the stator slot, the sum of the thickness of all legs after pressing and the thickness of the pressing block is equal to the depth of the stator slot.

[0015] In at least one embodiment, the width of the stator slot gradually increases along the radial direction of the stator; in the same stator slot, of any two adjacent legs, the thickness of the leg close to the pressing block is smaller than the thickness of the leg far from the pressing block.

[0016] In at least one embodiment, at least one of the following is also included:

[0017] The annular yoke is an integrally formed structure including soft magnetic composite materials after being pressed and sintered;

[0018] The inner ring member comprises at least one long strip of oriented silicon steel sheet, which is wound and stacked to form an annular inner ring member;

[0019] When the annular yoke is made of a soft magnetic composite material, end stacks are provided at both axial ends of the annular yoke. The end stacks are formed by stacking sheet-shaped silicon steel sheets, and the hardness of the end stacks is greater than the hardness of the annular yoke.

[0020] In at least one embodiment, the distance between the end of the welding end of the flat wire winding and one axial end of the stator core is equal to the product of the length of the bent welded portion and the sine value of the bending angle of the bent welded portion.

[0021] According to a second aspect of the present application, a flat wire motor is provided, comprising any stator provided in the second aspect.

[0022] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include:

[0023] In the stator of the flat wire motor provided in the embodiment of the present application, the sub-conductor with the bent welding portion pre-formed is inserted into the corresponding stator slot, which can avoid the problem of the gap between two adjacent bent welding portions, can ensure the contact area of ​​the two adjacent bent welding portions, facilitate the subsequent welding process, and is conducive to ensuring the welding quality and the stability of the flat wire motor. Moreover, the pre-formed bent welding portion facilitates the precise control of the bending angle of the bent welding portion.

[0024] At the same time, the sub-conductor forms a bent welding portion in advance, which can avoid reserving a clamping section on the leg of the sub-conductor, can reduce the axial height of the flat wire winding, can reduce the copper loss of the flat wire motor, and can improve the efficiency of the flat wire motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the stator of the flat wire motor provided in the first embodiment of the present application.

[0026] Figure 2 yes Figure 1 sectional view of .

[0027] Figure 3 yes Figure 1 Schematic diagram of the structure of a sub-conductor of the medium flat wire winding.

[0028] Figure 4 yes Figure 1 Schematic diagram of the structure of the stator core.

[0029] Figure 5 yes Figure 4 Schematic diagram of the structure of the inner ring.

[0030] Figure 6 yes Figure 4 A schematic diagram of the structure of an arc-shaped yoke.

[0031] Figure 7 yes Figure 4 Schematic diagram of the structure of another arc-shaped yoke.

[0032] Figure 8 It is a schematic diagram of the arrangement of a pressing block and a leg in a stator slot of a flat wire motor provided in the first embodiment of the present application.

[0033] Fig. 9 It is a schematic structural diagram of a connecting piece in a stator of a flat wire motor provided in the first embodiment of the present application.

[0034] Fig.10 It is a schematic structural diagram of a stator core in a stator of a flat wire motor provided in a second embodiment of the present application.

[0035] Description of reference numerals:

[0036] 100- stator core; 200- flat wire winding;

[0037] 10-annular yoke; 11-arc yoke; 111-pressing block; 112-groove; 113-convex part; 12-connecting piece;

[0038] 20-inner ring; 21-tooth portion; 22-stator slot;

[0039] 30-sub-conductor; 31-leg; 32-bending portion; 33-bending welding portion;

[0040] 40-End stack. DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0042] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps and / or operations, but does not exclude the implementation of other features, information, data, steps, operations and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" may be implemented as "A", or as "B", or as "A and B".

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0044] Unless otherwise specified, the axial, radial and circumferential directions mentioned in this application are all referenced to the axial, radial and circumferential directions of the stator core.

[0045] First embodiment

[0046] Reference Figures 1 to 9 , introduces the stator of the flat wire motor provided by the first embodiment of the present application.

[0047] like Figure 1 As shown, the stator includes a stator core 100 and a flat wire winding 200 .

[0048] In this embodiment, if Figure 2 , Figure 4 As shown, the stator core 100 includes an annular yoke 10 and an inner ring 20, and the annular yoke 10 is sleeved on the outer circumference of the inner ring 20. Figure 2 , Figure 4 , Figure 5 As shown, the outer peripheral portion of the inner ring member 20 includes a plurality of teeth 21 , and the teeth 21 are arranged at intervals along the circumferential direction, so that a stator slot 22 is formed between two adjacent teeth 21 .

[0049] In this embodiment, the flat wire winding 200 includes a multi-phase (eg, three-phase) winding, and each phase winding includes a plurality of sub-conductors 30. Figure 3 As shown, the sub-conductor 30 is in a hairpin shape, and the cross section of the sub-conductor 30 is approximately rectangular. The sub-conductor 30 includes a leg 31, a bent portion 32, and a bent welding portion 33. One end of two adjacent legs 31 is connected to the bent portion 32, and the other end is connected to the bent welding portion 33.

[0050] It should be noted that, in order to facilitate readers to intuitively understand the structure of the sub-conductor 30, Figure 3 The leg portion 31, the bent portion 32 and the bent welding portion 33 are separated by dotted lines, which do not exist in the actual product. Figure 3 Dotted line shown.

[0051] In this embodiment, according to the specifications of the flat wire winding 200 , the bent welding portions 33 of each sub-conductor 30 are bent to their respective corresponding set angles, so that after the leg portion 31 of the sub-conductor 30 extends into the stator slot 22 , two adjacent bent welding portions 33 to be welded can contact each other.

[0052] After the bent welding portions 33 of two adjacent sub-conductors 30 are welded, the two sub-conductors 30 are electrically connected.

[0053] In the present application, the sub-conductor 30 is a preformed part, that is, each sub-conductor 30 has been preformed into a hairpin shape of the final form, and it is not necessary to bend the sub-conductor 30 after inserting it into the stator slot 22. Optionally, the sub-conductor 30 is an X-pin, that is, a sub-conductor with a very small axial dimension at the welding end of the sub-conductor referred to in the industry, and the welding ends of adjacent sub-conductors form an X shape. In order to facilitate the fixing of the sub-conductor 30 in the stator slot 22,

[0054] In this embodiment, the leg 31 of the preformed sub-conductor 30 can extend radially into the stator slot 22 from the radial notch of the stator slot 22, so that the leg 31 is located in the stator slot 22, and the bent portion 32 and the bent welding portion 33 are respectively located outside the axial ends of the stator slot 22.

[0055] It is known to those skilled in the art that in the related art, the flat wire is usually inserted into the stator slot first, and then the flat wire is processed by a twisting tool to form a bent welding portion. In this process, a tooth guard tool is also required to clamp the flat wire, so a clamping section needs to be reserved for the flat wire, which will result in a high axial height of the formed flat wire winding.

[0056] In contrast, in this embodiment, since the sub-conductor 30 pre-forms the bent welding portion 33, the sub-conductor 30 does not need to reserve a clamping section, thereby reducing the axial height of the flat wire winding, reducing the copper loss of the flat wire motor, and improving the efficiency of the flat wire motor.

[0057] Combination Figure 1 and Figure 3 It can be seen that in this embodiment, since the sub-conductor 30 does not need to reserve a clamping section, the distance d between the end of the welding end of the flat wire winding 200 and one axial end of the stator core 100 is equal to the product of the length L of the bent welding portion 33 and the sine value of the bending angle θ of the bent welding portion 33. That is, in this embodiment, the axial height of the welding end of the flat wire winding 200 is only related to the length L of the bent welding portion 33 of the sub-conductor 30 and its bending angle θ. This helps to reduce the axial height of the welding end of the flat wire winding 200.

[0058] In this embodiment, after the leg portion 31 of the sub-conductor 30 extends into the corresponding stator slot 22, the connection surface between the bent welding portion 33 and the leg portion 31 is coplanar with the end surface of one axial end of the stator core 100. That is, the leg portion 31 of the sub-conductor 30 is entirely located in the stator slot 22, and the bent portion 32 and the bent welding portion 33 are both located outside the stator slot.

[0059] In this embodiment, after the legs 31 of all the sub-conductors 30 extend into the corresponding stator slots 22, the annular yoke 10 is sleeved on the outer periphery of the inner ring member 20, and after the annular yoke 10 and the inner ring member 20 are combined to form the stator core 100, the stator slots 22 form closed slots. The legs 31 of each sub-conductor 30 are fixed in the closed slot, which can reduce the probability of leg movement and is conducive to reducing noise during the operation of the flat wire motor.

[0060] Moreover, the closed slot design can reduce the harmonic content of the air gap magnetic flux density, thereby making the motor have smaller torque pulsation.

[0061] In this embodiment, if Figure 4 As shown, the annular yoke 10 includes six arc-shaped yokes 11 , and the six arc-shaped yokes 11 are spliced ​​along the circumferential direction to form the annular yoke 10 .

[0062] like Figure 6 and Figure 7As shown, the inner peripheral portion of the arc-shaped yoke 11 includes a plurality of circumferentially spaced pressing blocks 111. The number of pressing blocks 111 in the annular yoke 10 is the same as the number of stator slots 22 in the inner ring 20, so that each stator slot 22 is equipped with a pressing block 111.

[0063] After the annular yoke 10 is sleeved on the outer periphery of the inner ring member 20, the pressure block 111 is radially inserted into the stator slot 22, so that the arc-shaped yoke 11 and the inner ring member 20 form an interlocking structure, which can ensure the stability of the connection between the arc-shaped yoke 11 and the inner ring member 20 and prevent the arc-shaped yoke 11 and the inner ring member 20 from circumferential relative movement.

[0064] In this embodiment, if Figure 8 As shown, the pressing block 111 will contact the radially outermost leg portion 31 in the stator slot 22, thereby avoiding the formation of air gaps in the stator slot 22 and ensuring the slot fill rate. At the same time, the pressing block 111 will limit the radial movement of the leg portion 31.

[0065] like Figure 8 As shown, the two circumferential side surfaces of the pressing block 111 are in contact with the slot wall of the stator slot 22, and the two circumferential side surfaces of each leg portion 31 are in contact with the slot wall of the stator slot 22. Thus, the slot fill rate can be further guaranteed.

[0066] It should be noted that the two circumferential side surfaces of each leg 31 described above are in contact with the slot wall of the stator slot 22, which does not necessarily require the leg 31 to be in direct contact with the slot wall of the stator slot 22, and insulating paper may be provided between the side surface of the leg 31 and the slot wall of the stator slot 22. The side surface of the leg 31 emphasized here is in contact with the slot wall of the stator slot 22, mainly to indicate that the slot wall of the stator slot 22 can play the role of limiting the leg 31.

[0067] In this embodiment, if Figure 8 As shown, after each leg 31 extends into the stator slot 22, the leg 31 is pressed together by the pressing block 111, so that the radial side of the leg 31 is deformed, and finally the side surfaces of the two legs 31 are in contact and engaged. While ensuring the slot full rate, the connection strength between adjacent legs 31 can be improved, the probability of leg movement can be reduced, and the noise during the operation of the flat wire motor can be reduced.

[0068] In this embodiment, the leg portion 31 is pressed by the pressing block 111 to deform the radial side of the leg portion 31, which helps to block the eddy current path, thereby reducing the AC loss of the sub-conductor 30 and the heat generation of the flat wire winding.

[0069] In this embodiment, all legs 31 to be embedded in the same stator slot 22 have the same radial thickness. Figure 8As shown, along the radial direction of the stator, the width of the stator slot 22 gradually increases, that is, the cross section of the stator slot 22 is trapezoidal, so that the leg portion 31 of the formed sub-conductor 30 can be easily extended into the stator slot 22 in the radial direction, and the probability of the slot wall of the stator slot 22 scratching the leg portion 31 can be reduced. After being pressed by the pressing block 111, the radial thickness of the leg portion 31 closer to the pressing block 111 is smaller.

[0070] Optionally, along the radial direction of the stator, the width of the pressing block 111 gradually increases to ensure that both circumferential side surfaces of the pressing block 111 are in contact with the slot wall of the stator slot 22 to reduce the air gap and ensure the stability of the bite connection between the arc-shaped yoke 11 and the inner ring member 20.

[0071] It should be noted that in this embodiment, the legs 31 and the bent portions 32 of all the conductors 30 are covered with an insulating layer. The insulating layer includes a plastic material, so when the pressing block 111 presses the legs 31, the insulating layer will also change with the shape without cracking or breaking.

[0072] Moreover, in the process of the insulating layer changing with the shape, the thickness of the insulating layer at the protrusion of the leg portion 31 will increase, thereby helping to reduce the probability of insulation failure caused by tip discharge at the protrusion of the leg portion 31.

[0073] In this embodiment, if Figure 6 As shown, one end of the arc yoke 11 is provided with a groove 112, and the other end is provided with a convex portion 113 that can be engaged with the groove 112. Among two adjacent arc yokes 11, the convex portion 113 of one is engaged in the groove 112 of the other, which can limit the relative movement of the two arc yokes 11 in the radial direction.

[0074] In this embodiment, if Figure 7 As shown, grooves 112 are provided at both ends of another arc-shaped yoke 11, and the grooves 112 of two adjacent arc-shaped yokes 11 are opposite and connected. Fig. 9 After the connecting member 12 is inserted into the two communicating grooves 112 , it can play the role of fixing the two arc-shaped yoke parts 11 .

[0075] In this embodiment, grooves 112 are provided at both ends of at least one arc-shaped yoke 11 , so as to facilitate inserting each pressing block 111 of the arc-shaped yoke 11 into each stator slot 22 in the radial direction.

[0076] In this embodiment, after each leg portion 31 extends into the stator slot 22, each pressing block 111 of the arc-shaped yoke 11 is inserted into each stator slot 22 in the radial direction, so that the pressing block 111 presses the leg portion 31. During the pressing process, in order to avoid the inner circumferential wall of the inner ring member 20 from breaking, the inner ring member 20 can be sleeved on the columnar fixture so that the outer circumferential surface of the columnar fixture supports the inner circumferential wall of the inner ring member 20.

[0077] In this embodiment, the annular yoke 10 includes SMC (Soft Magnetic Composite), which is an integrally formed structure after pressing and sintering. The molding method of the soft magnetic composite material is simple, and through reasonable mold design, it is easy to form the annular yoke 10 into various required shapes, such as forming a coolant channel inside it, or forming a heat dissipation structure (such as a heat dissipation channel or heat dissipation fin structure located on the periphery) on its periphery. In addition, the annular yoke 10 made of soft magnetic composite material has better axial thermal conductivity than traditional stacked silicon steel sheets, which is more conducive to the heat dissipation inside the iron core.

[0078] In addition, the annular yoke 10 made of soft magnetic composite material has greater vibration damping than stacked silicon steel sheets, which can make the stator exhibit better NVH performance.

[0079] In this embodiment, the inner ring 20 is formed by winding and stacking a long strip of oriented silicon steel sheets. Considering that the magnetic force lines of the core teeth are in the radial direction, the high magnetic permeability direction of the oriented silicon steel is along the radial direction R of the stator. The oriented silicon steel can reduce the magnetic saturation of the teeth, making the motor more efficient.

[0080] Second embodiment

[0081] Reference Fig.10 The second embodiment of the present application is introduced. The second embodiment is a modification of the first embodiment, and components having the same or similar structures or functions as those in the first embodiment are marked with the same reference numerals, and detailed descriptions of these components are omitted.

[0082] In this embodiment, if Fig.10 As shown, end stacks 40 are further provided at both axial ends of the annular yoke 10 . The end stacks 40 are formed by stacking sheet-shaped silicon steel sheets. The hardness of the end stacks 40 is greater than the hardness of the annular yoke 10 .

[0083] The end stack 40 is formed by stacking a plurality of (e.g., 3 to 10) silicon steel sheets in a laminar shape, and the silicon steel sheets forming the end stack 40 are non-oriented silicon steel sheets. The hardness of the silicon steel sheets used in the end stack 40 is greater than the hardness of the annular yoke 10 made of a soft magnetic composite material. Therefore, the end stack 40 plays a role in protecting the annular yoke 10 at both ends, so that the annular yoke 10 is not easily damaged by bumps, etc., so that the overall mechanical strength of the stator core is improved.

[0084] In this embodiment, the end stack 40 includes at least two arc-shaped pieces, and all the arc-shaped pieces are spliced ​​along the circumferential direction to form the end stack 40 .

[0085] Optionally, the inner peripheral portion of the arc-shaped member includes a plurality of pressing blocks 111 arranged at intervals in the circumferential direction.

[0086] This application has at least one of the following advantages:

[0087] (1) The sub-conductor is first formed into a bent welding part for welding and then inserted into the corresponding stator slot, so as to accurately control the bending angle of the bent welding part. This can ensure the contact area of ​​two adjacent bent welding parts, facilitate the subsequent welding process, and help ensure the welding quality and the stability of the flat wire motor.

[0088] (2) Since the sub-conductor first forms a bent welding portion for welding, the axial height of the flat wire winding can be reduced, the copper loss of the flat wire motor can be reduced, and the efficiency of the flat wire motor can be improved.

[0089] (3) By sleeve-arranging the annular yoke and the inner ring, it is convenient to insert the sub-conductor into the stator slot of the inner ring first, and then sleeve the annular yoke on the outer periphery of the inner ring, so that the leg of the sub-conductor is fixed in the closed slot formed by the stator slot and the annular yoke. The probability of leg movement can be reduced, which is beneficial to reducing the noise during the operation of the flat wire motor. The setting of the closed slot is also beneficial to reducing magnetic leakage loss.

[0090] Of course, the present application is not limited to the above-mentioned embodiments. Under the guidance of the present application, those skilled in the art may make various modifications and combinations to the above-mentioned embodiments of the present application without departing from the scope of the present application.

Claims

1. A stator of a flat wire motor, comprising a stator core (100) and a flat wire winding (200), wherein the stator core (100) comprises: An annular yoke (10) and an inner ring member (20) sleeved in the annular yoke (10); the outer peripheral portion of the inner ring member (20) comprises a plurality of teeth (21) arranged at intervals in the circumferential direction, and a stator slot (22) is formed between any two adjacent teeth (21), characterized in that: Each phase winding of the flat wire winding (200) comprises a plurality of sub-conductors (30), each of the sub-conductors (30) comprising at least two legs (31) and a bent portion (32) connecting two adjacent legs (31); the leg (31) of each sub-conductor (30) comprises a bent welding portion (33) welded to an adjacent sub-conductor (30), the bent welding portion (33) being formed before the sub-conductor (30) is inserted into the stator slot (22); the leg (31) of the sub-conductor (30) can extend radially from a radial notch of the stator slot (22) into the stator slot (22), and the bent portion (32) and the bent welding portion (33) are respectively located outside the axial ends of the stator slot (22).

2. The stator of the flat wire motor according to claim 1, characterized in that: The annular yoke (10) comprises at least two arc-shaped yokes (11) spliced ​​together along the circumferential direction.

3. The stator of the flat wire motor according to claim 2, characterized in that: The inner peripheral portion of the arc-shaped yoke (11) comprises a plurality of circumferentially spaced pressure blocks (111), each of the stator slots (22) having a pressure block (111) inserted therein, the pressure block (111) being in contact with the radially outermost leg portion (31) in the stator slot (22).

4. The stator of the flat wire motor according to claim 3, characterized in that: Along the circumference of the stator, the side surface of the pressing block (111) contacts the slot wall of the stator slot (22), and the side surface of the leg portion (31) contacts the slot wall of the stator slot (22).

5. The stator of the flat wire motor according to claim 3, characterized in that: Along the radial direction of the stator, side surfaces of two adjacent legs (31) are in contact and engaged.

6. The stator of the flat wire motor according to claim 3, characterized in that: Along the radial direction of the stator, the sum of the thickness of all the legs (31) to be embedded in the same stator slot (22) and the thickness of the pressing block (111) is greater than the depth of the stator slot (22); after the pressing block (111) is inserted into the stator slot (22), the sum of the thickness of all the legs (31) after pressing and fitting and the thickness of the pressing block (111) is equal to the depth of the stator slot (22).

7. The stator of the flat wire motor according to claim 3, characterized in that: Along the radial direction of the stator, the width of the stator slot (22) gradually increases; In the same stator slot (22), of any two adjacent legs (31), the thickness of the leg (31) close to the pressing block (111) is smaller than the thickness of the leg (31) far from the pressing block (111).

8. The stator of the flat wire motor according to claim 1, characterized in that: Also includes at least one of the following: The annular yoke (10) is an integrally formed structure comprising a soft magnetic composite material that has been pressed and sintered; The inner ring member (20) comprises at least one long strip of oriented silicon steel sheet, and the oriented silicon steel sheets are wound and stacked to form the inner ring member (20) in a ring shape; When the annular yoke (10) is made of a soft magnetic composite material, end stacks (40) are provided at both axial ends of the annular yoke (10), the end stacks (40) being formed by stacking sheet-shaped silicon steel sheets, and the hardness of the end stacks (40) being greater than the hardness of the annular yoke (10).

9. The stator of the flat wire motor according to claim 1, characterized in that: The distance between the end of the welding end of the flat wire winding (200) and one axial end of the stator core (100) is equal to the product of the length of the bent welding portion (33) and the sine value of the bending angle of the bent welding portion (33).

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

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