Stator and motor

Abstract

The utility model relates to the technical field of motors, in particular to a stator and a motor. The stator provided by the utility model comprises a stator iron core and stator slot wedges, the stator iron core is provided with a plurality of open slots at intervals along the circumferential direction, the open slots penetrate through the stator iron core along the radial direction of the stator iron core, one stator slot wedge is clamped and fixed in each open slot, and the stator slot wedges are plugged at the top openings of the corresponding open slots. The stator slot wedge comprises a magnetic conductive part, and the length of the open slot is larger than that of the magnetic conductive part in the radial direction of the stator core, so that the magnetic conductive part is completely located in the open slot. According to the stator provided by the utility model, the length of the open slot is greater than that of the magnetic conductive part, so that the magnetic conductive part is completely positioned in the open slot, the phenomenon of magnetic leakage is avoided, a magnetic circuit is optimized, the performance of a motor is improved, and the accommodation degree of poor processing consistency of the magnetic conductive part is also improved. The stator is applied to the motor, so that the performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator and a motor. Background Art

[0002] Axial flux permanent magnet motors have the advantages of compact structure, high power density and high efficiency, and have become a major focus in the motor industry. The stator in a motor is an important part of the magnetic circuit of the motor. The iron core slots for storing windings in the stator include three structures: open slots, semi-open slots and closed slots. At present, the structure of the iron core slot that can maximize the performance of the motor is the semi-open slot. The semi-open slot can not only achieve the magnetic concentration effect, but also effectively reduce the loss of the magnetic slot wedge.

[0003] In the related art, the stator slot wedge is usually installed in the open slot of the iron core, so as to play the role of a semi-open slot. However, the magnetic conduction part in the stator slot wedge is likely to protrude out of the open slot, resulting in magnetic leakage, which greatly reduces the performance of the motor.

[0004] Therefore, there is an urgent need for a stator and a motor to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a stator and a motor, so as to avoid magnetic leakage, optimize the magnetic circuit, improve the performance of the motor, and also improve the tolerance to poor machining consistency of the magnetic conduction part.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A stator, comprising:

[0008] A stator core, on which a plurality of open slots are circumferentially spaced along its circumference, and the open slots penetrate the stator core in the radial direction of the stator core; and

[0009] A stator slot wedge, one stator slot wedge is clamped and fixed in each open slot, and the stator slot wedge seals the top opening of the corresponding open slot;

[0010] The stator slot wedge includes a magnetic conduction part. Along the radial direction of the stator core, the length of the open slot is greater than the length of the magnetic conduction part, so that the magnetic conduction part is completely located within the open slot.

[0011] As an optional solution, along the radial direction of the stator core, the length of the stator slot wedge is greater than the length of the open slot.

[0012] As an optional solution, the stator slot wedge further includes:

[0013] A non-magnetic part, on which the magnetic part is arranged, and in the radial direction of the stator core, the length of the non-magnetic part is greater than the length of the open slot.

[0014] As an alternative, in the radial direction of the stator core, the non-magnetic part includes a first limiting part, a main body part and a second limiting part connected in sequence. The magnetic part is arranged on the main body part, the magnetic part is located between the first limiting part and the second limiting part, and the first limiting part and the second limiting part respectively fit the two end faces of the magnetic part along its length direction.

[0015] As an alternative, in the radial direction of the stator core, the first limiting part extends out of the open slot towards the inside of the stator core, and the second limiting part extends out of the open slot towards the outside of the stator core.

[0016] As an alternative, the stator core includes a yoke part and a plurality of tooth parts. One tooth part is clamped between two adjacent open slots. The height of the tooth part extends along the axial direction of the motor. The bottom of the tooth part is connected to the yoke part, and an axial air gap is formed between the top of the tooth part and the rotor.

[0017] As an alternative, the magnetic part includes a plurality of magnetic sheets stacked and fixed in sequence in the radial direction of the stator core. Adjacent two magnetic sheets are insulated from each other, and the outer side wall of the magnetic sheet is clamped and magnetically connected with the inner side wall of the open slot.

[0018] As an alternative, the plurality of magnetic sheets are stacked and formed by a stack riveting forming process to form the magnetic part;

[0019] Or, the plurality of magnetic sheets are stacked and formed by a process of fixing with pins to form the magnetic part.

[0020] As an alternative, the plurality of magnetic sheets are stacked and formed by a stack riveting forming process, and among two adjacent stacked magnetic sheets, one is provided with a positioning protrusion and the other is provided with a positioning groove, and the positioning protrusion is inserted and fixed in the positioning groove.

[0021] An electric motor includes a rotor, and the electric motor further includes the stator as described above, and the stator cooperates with the rotor.

[0022] The beneficial effects of the present utility model:

[0023] The present utility model provides a stator, which includes a stator core and a stator slot wedge. Among them, a plurality of opening slots are circumferentially spaced on the stator core, and the opening slots penetrate the stator core in the radial direction of the stator core. A stator slot wedge is fixedly clamped in each opening slot, and the stator slot wedge seals the top opening of the corresponding opening slot. The stator slot wedge includes a magnetic conduction part. Along the radial direction of the stator core, the length of the opening slot is greater than the length of the magnetic conduction part, so that the magnetic conduction part is completely located within the opening slot. For the stator provided by the present utility model, by making the length of the opening slot greater than the length of the magnetic conduction part, it can ensure that the magnetic conduction part is completely located within the opening slot, avoiding the magnetic conduction part extending out of the opening slot along the radial direction of the stator core, thereby avoiding the phenomenon of magnetic leakage, optimizing the magnetic circuit, and improving the performance of the motor. In addition, during the processing of the magnetic conduction part, even if the actual length of the processed magnetic conduction part is slightly greater than the preset length, it can effectively avoid the magnetic conduction part extending out of the opening slot along the radial direction of the stator core, improving the tolerance for poor processing consistency of the magnetic conduction part.

[0024] The present utility model also provides a motor. By applying the above stator, the phenomenon of magnetic leakage can be avoided, the magnetic circuit is optimized, and the performance of the motor is improved. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the stator provided in Embodiment 1 of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the stator slot wedge provided in Embodiment 1 of the present utility model;

[0027] Figure 3 is a schematic structural diagram of the stator core provided in Embodiment 1 of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the magnetic conduction part provided in Embodiment 1 of the present utility model;

[0029] Figure 5 is a schematic structural diagram of the magnetic conduction part provided in Embodiment 2 of the present utility model.

[0030] In the figure:

[0031] 10. Stator slot wedge; 20. Stator core; 201. Opening slot; 202. Yoke part; 203. Tooth part;

[0032] 1. Magnetic conduction part; 11. Magnetic conduction sheet; 12. Fixed pin; 2. Non-magnetic conduction part; 21. Main body part; 22. First limiting part; 23. Second limiting part. Detailed Embodiments

[0033] To make the technical problems solved by the present utility model, the adopted technical solutions and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0037] Embodiment 1

[0038] In the prior art, the stator slot wedge is usually installed in the open slot of the iron core to play the role of a semi-open slot. However, during the processing and manufacturing of the magnetic conduction part in the stator slot wedge, it is difficult to ensure the consistency of the length of the magnetic conduction part, resulting in the inability to accurately ensure the consistency between the length of the magnetic conduction part and the length of the open slot, making the magnetic conduction part prone to protruding out of the open slot, thereby generating the phenomenon of magnetic leakage and greatly reducing the performance of the motor.

[0039] To solve the above problems, as Figure 1As shown in the figure, this embodiment provides a stator, which includes a stator core 20 and a stator slot wedge 10. Among them, a plurality of opening slots 201 are arranged at intervals along the circumferential direction of the stator core 20. The opening slots 201 penetrate the stator core 20 along the radial direction of the stator core 20. A stator slot wedge 10 is clamped and fixed in each opening slot 201. The stator slot wedge 10 seals the top opening of the corresponding opening slot 201. The stator slot wedge 10 includes a magnetic conduction part 1. Along the radial direction of the stator core 20, the length of the opening slot 201 is greater than the length of the magnetic conduction part 1, so that the magnetic conduction part 1 is completely located within the opening slot 201. For the stator provided in this embodiment, by making the length of the opening slot 201 greater than the length of the magnetic conduction part 1, it can be ensured that the magnetic conduction part 1 is completely located within the opening slot 201, avoiding the magnetic conduction part 1 protruding out of the opening slot 201 along the radial direction of the stator core 20, thereby avoiding the phenomenon of magnetic leakage, optimizing the magnetic circuit, and improving the performance of the motor. In addition, during the processing of the magnetic conduction part 1, even if the actual length of the processed magnetic conduction part 1 is slightly greater than the preset length, it can effectively avoid the magnetic conduction part 1 protruding out of the opening slot 201 along the radial direction of the stator core 20, improving the tolerance for poor processing consistency of the magnetic conduction part 1.

[0040] It should be noted that the magnetic conduction part 1 being completely located within the opening slot 201 means that along the radial direction of the stator core 20, the magnetic conduction part 1 will not protrude out of the opening slot 201.

[0041] Optionally, in this embodiment, along the radial direction of the stator core 20, the length of the stator slot wedge 10 is greater than the length of the opening slot 201. By making the length of the stator slot wedge 10 greater than the length of the opening slot 201, when the stator slot wedge 10 needs to be clamped and installed in the opening slot 201, first align the first end of the stator slot wedge 10 with the opening slot 201, and then push the stator slot wedge 10 into the opening slot 201 from the outside to the inside along the radial direction of the stator core 20. When the stator slot wedge 10 needs to be taken out of the opening slot 201, grab the second end of the stator slot wedge 10 protruding out of the opening slot 201 and pull the stator slot wedge 10 outwards, making the installation and disassembly of the stator slot wedge 10 more convenient and also improving the efficiency of winding wire insertion.

[0042] Optionally, in this embodiment, the stator slot wedge 10 further includes a non-magnetic conduction part 2. The magnetic conduction part 1 is arranged on the non-magnetic conduction part 2, and along the radial direction of the stator core 20, the length of the non-magnetic conduction part 2 is greater than the length of the opening slot 201. The non-magnetic conduction part 2 in the stator slot wedge 10 plays a role in limiting the winding, and it is not necessary to set the entire stator slot wedge 10 to a magnetic conduction structure, reducing the eddy current phenomenon, thereby improving the efficiency of the motor.

[0043] Optionally, in this embodiment, as Figure 1 and Figure 2As shown, the stator slot wedge 10 includes two magnetic conduction parts 1 arranged at intervals in the width direction of the stator slot wedge 10. Specifically, the outer side walls of each magnetic conduction part 1 are clamped and magnetically connected to the inner side walls of the corresponding sides of the open slot 201. By arranging the two magnetic conduction parts 1 at intervals and making each magnetic conduction part 1 magnetically connected to the inner side wall of the open slot 201, the function of a semi-open slot is better achieved, and the electromagnetic performance of the stator is improved. In addition, the above setting enables both sides of the stator slot wedge 10 in its width direction to be clamped to the inner side wall of the open slot 201, ensuring the reliability and stability of the clamping and positioning of the stator slot wedge 10 in the open slot 201.

[0044] It should be noted that in this embodiment, the magnetic conduction part 1 can be made of silicon steel sheet material, and the non-magnetic conduction part 2 is injection-molded with plastic material. The plastic material can select appropriate plastic materials according to the use environment and temperature of the motor, including but not limited to plastic materials such as PP, PA, POM, PPA, PPS, PES, PEI, and PEEK.

[0045] Optionally, in this embodiment, as Figure 1 and Figure 2 shown, along the radial direction of the stator core 20, the non-magnetic conduction part 2 includes a first limiting part 22, a main body part 21, and a second limiting part 23 connected in sequence. A magnetic conduction part 1 is arranged on the main body part 21, the magnetic conduction part 1 is located between the first limiting part 22 and the second limiting part 23, and the first limiting part 22 and the second limiting part 23 respectively fit the two end faces of the magnetic conduction part 1 along its length direction. By setting the first limiting part 22 and the second limiting part 23, the two ends of the magnetic conduction part 1 are fixed and limited.

[0046] In this embodiment, as Figure 1 shown, along the radial direction of the stator core 20, the first limiting part 22 extends outward from the open slot 201 towards the inside of the stator core 20, and the second limiting part 23 extends outward from the open slot 201 towards the outside of the stator core 20. The above setting effectively avoids the problem of magnetic leakage of the stator slot wedge 10. In addition, it should be noted that when the end face of the second limiting part 23 facing the stator core 20 abuts against the outer circumferential surface of the stator core 20, it proves that the stator slot wedge 10 is inserted in place, thus ensuring the positioning and installation of the stator slot wedge 10 in the open slot 201.

[0047] In this embodiment, as Figure 3 shown, the stator core 20 includes a yoke part 202 and a plurality of tooth parts 203. A tooth part 203 is clamped between two adjacent open slots 201. The height of the tooth part 203 extends along the axial direction of the motor. The bottom of the tooth part 203 is connected to the yoke part 202, and an axial air gap is formed between the top of the tooth part 203 and the rotor to ensure the normal operation of the motor.

[0048] In this embodiment, as Figure 4 shown, multiple magnetic conductive sheets 11 are stacked and formed by a stacked riveting forming process to form a magnetic conductive part 1. The stacked riveting forming process has the advantage of being easy to process. Specifically, a continuous silicon steel sheet coil can be first fed into a stacked riveting die, and the required shape can be obtained through blanking once or multiple times, so as to form the magnetic conductive sheet 11 with the required shape. Then, multiple magnetic conductive sheets 11 are stacked and riveted up and down to form the magnetic conductive part 1 with the required length dimension. In addition, an insulating material can be coated on the part where two adjacent magnetic conductive sheets 11 are stacked and attached to ensure that two adjacent magnetic conductive sheets 11 are insulated from each other.

[0049] Optionally, in this embodiment, the thickness of each magnetic conductive sheet 11 can be 0.1 mm to 0.5 mm. Specifically, the thickness of each magnetic conductive sheet 11 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm. The limitation of the above values can ensure the consistency of the length of the processed magnetic conductive part 1 as much as possible and avoid the magnetic conductive part 1 extending out of the opening groove 201 due to excessive length. It should be noted that the specific number of magnetic conductive sheets 11 included in each magnetic conductive part 1 can be set according to specific requirements as long as the length of the magnetic conductive part 1 is less than the length of the opening groove 201.

[0050] In addition, it should be noted that when multiple magnetic conductive sheets 11 are stacked and formed by a stacked riveting forming process, among two adjacent stacked magnetic conductive sheets 11, a positioning protrusion is provided on one of them, and a positioning groove is provided on the other. The positioning protrusion is inserted and fixed in the positioning groove, so as to form a riveting point between two adjacent magnetic conductive sheets 11, which is convenient to realize the stacked fixation between two adjacent magnetic conductive sheets 11. It should be noted that the number of riveting points formed between two adjacent magnetic conductive sheets 11 in this embodiment is not specifically limited.

[0051] This embodiment also provides a motor, which includes a rotor and the above-mentioned stator, and the stator cooperates with the rotor. The motor provided in this embodiment can avoid the phenomenon of magnetic leakage by applying the above-mentioned stator, optimize the magnetic circuit, and improve the performance of the motor. It should be noted that in this embodiment, the motor mainly refers to an axial flux permanent magnet motor, and an axial air gap is formed between the top of the tooth part 203 and the rotor.

[0052] Embodiment Two

[0053] The stator slot wedge 10 provided in this embodiment is basically the same as that in Embodiment One. The difference between the stator slot wedge 10 provided in this embodiment and that in Embodiment One is as follows:

[0054] In this embodiment, as Figure 5As shown, a plurality of magnetic conductive sheets 11 are stacked and formed by a needle-threading and fixing process to form a magnetic conductive portion 1. The above arrangement effectively ensures the structural stability and reliability of the magnetic conductive portion 1. Specifically, each magnetic conductive sheet 11 is provided with a threading and fixing hole, and the fixing needle 12 is threaded and fixed in the threading and fixing holes of the plurality of magnetic conductive sheets 11 in sequence.

[0055] Specifically, a continuous silicon steel sheet coil can be first fed into a punching die, and the desired shape can be obtained through punching, thereby forming a magnetic conductive sheet 11 of the desired shape, and each magnetic conductive sheet 11 is punched out with a through-and-through fixing hole. Multiple magnetic conductive sheets 11 are stacked up and down and pressed tightly, and the fixing needles 12 are passed through each of the through-and-through fixing holes. Finally, the fixing needles 12 are fixed by riveting at both ends, thereby obtaining the desired magnetic conductive part 1.

[0056] Optionally, in this embodiment, the thickness of each magnetic conductive sheet 11 can be 0.1mm to 0.5mm. Specifically, the thickness of each magnetic conductive sheet 11 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm. The above numerical value limitation can ensure the consistency of the length of the processed magnetic conductive part 1 as much as possible, and avoid the magnetic conductive part 1 extending out of the opening slot 201 due to excessive length. It should be noted that the specific number of magnetic conductive sheets 11 included in each magnetic conductive part 1 can be set according to specific needs, as long as the length of the magnetic conductive part 1 is less than the length of the opening slot 201.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A stator, characterized in that: include: A stator core (20), wherein a plurality of open slots (201) are provided on the stator core (20) at intervals along its circumferential direction, and the open slots (201) penetrate the stator core (20) along the radial direction of the stator core (20); and A stator slot wedge (10), wherein each of the open slots (201) is clamped and fixed with a stator slot wedge (10), and the stator slot wedge (10) is sealed at the top opening of the corresponding open slot (201); The stator slot wedge (10) comprises a magnetic conductive portion (1); along the radial direction of the stator core (20), the length of the open slot (201) is greater than the length of the magnetic conductive portion (1), so that the magnetic conductive portion (1) is completely located in the open slot (201).

2. The stator according to claim 1, characterized in that: Along the radial direction of the stator core (20), the length of the stator slot wedge (10) is greater than the length of the open slot (201).

3. The stator according to claim 2, characterized in that: The stator slot wedge (10) further comprises: A non-magnetic conductive portion (2), the magnetic conductive portion (1) being arranged on the non-magnetic conductive portion (2), and along the radial direction of the stator core (20), the length of the non-magnetic conductive portion (2) is greater than the length of the open slot (201).

4. The stator according to claim 3, characterized in that: Along the radial direction of the stator core (20), the non-magnetic conductive part (2) comprises a first limiting part (22), a main body (21) and a second limiting part (23) which are connected in sequence, the main body (21) being provided with the magnetic conductive part (1), the magnetic conductive part (1) being located between the first limiting part (22) and the second limiting part (23), and the first limiting part (22) and the second limiting part (23) respectively fit two end faces of the magnetic conductive part (1) along the length direction thereof.

5. The stator according to claim 4, characterized in that: Along the radial direction of the stator core (20), the first limiting portion (22) extends out of the opening slot (201) toward the inside of the stator core (20), and the second limiting portion (23) extends out of the opening slot (201) toward the outside of the stator core (20).

6. The stator according to any one of claims 1 to 5, characterized in that: The stator core (20) comprises a yoke (202) and a plurality of teeth (203), one of the teeth (203) being sandwiched between two adjacent opening slots (201), the height of the teeth (203) extending along the axial direction of the motor, the bottom of the teeth (203) being connected to the yoke (202), and an axial air gap being formed between the top of the teeth (203) and the rotor.

7. The stator according to any one of claims 1 to 5, characterized in that: The magnetic conductive portion (1) comprises a plurality of magnetic conductive sheets (11) which are stacked and fixed in sequence along the radial direction of the stator core (20), two adjacent magnetic conductive sheets (11) are insulated from each other, and the outer side walls of the magnetic conductive sheets (11) are snap-fitted to the inner side walls of the opening slots (201) and are magnetically connected.

8. The stator according to claim 7, characterized in that: The plurality of magnetic conductive sheets (11) are stacked and formed by a stacking riveting process to form the magnetic conductive portion (1); Alternatively, a plurality of the magnetic conductive sheets (11) are stacked and formed by a needle-threading and fixing process to form the magnetic conductive portion (1).

9. The stator according to claim 8, characterized in that: The plurality of magnetic conductive sheets (11) are stacked and formed by a stacking riveting process, and of the two adjacently stacked magnetic conductive sheets (11), one is provided with a positioning protrusion and the other is provided with a positioning groove, and the positioning protrusion is inserted and fixed in the positioning groove.

10. A motor, comprising a rotor, characterized in that: The motor further comprises a stator as claimed in any one of claims 1 to 9, wherein the stator cooperates with the rotor.

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