Stator of axial motor and axial motor

Abstract

The utility model relates to the technical field of motors, in particular to a stator of an axial motor and the axial motor. A stator of the axial motor comprises a stator iron core and magnetic slot wedges, a plurality of open slots are formed in the stator iron core at intervals in the circumferential direction of the stator iron core, the magnetic slot wedges are made of magnetic conductive materials, the magnetic slot wedges are clamped and fixed in the open slots, and the magnetic slot wedges block top openings of the open slots. And the upper end surface of the magnetic slot wedge is lapped on the upper end surface of the stator core. The magnetic slot wedge is made of the magnetic conductive material, and the upper end face of the magnetic slot wedge is in lap joint with the upper end face of the stator core, so that the inductance of the axial motor is effectively increased, and the flux weakening capability of the axial motor is remarkably improved. Besides, the upper end face of the magnetic slot wedge is in lap joint with the upper end face of the stator iron core, so that the contact area of the magnetic slot wedge and the stator iron core is increased, the connection stability of the magnetic slot wedge and the stator iron core is ensured, and the structural stability of the stator of the whole axial motor is further ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a stator and axial motor of axial motor. BACKGROUND

[0002] The axial motor has the advantages of compact structure, high power density and high efficiency, and has become a hot spot in the motor industry. The stator in the axial motor is an important part of the motor magnetic circuit. The core slot of the stator core in the stator is usually designed in the form of an open slot, and a magnetic slot wedge is installed in the open slot to increase the inductance of the axial motor and improve the flux-weakening capability of the axial motor. However, the installation of the magnetic slot wedge in the open slot is affected by the magnetic conductivity of the magnetic slot wedge, and the flux-weakening capability of the axial motor cannot be significantly improved. In addition, the installation stability of the magnetic slot wedge in the open slot cannot be guaranteed, which reduces the structural stability of the stator of the entire axial motor.

[0003] Therefore, there is an urgent need for a stator and axial motor of axial motor to solve the above problems. SUMMARY

[0004] The utility model discloses a stator and axial motor of axial motor to increase the inductance of the axial motor, significantly improve the flux-weakening capability of the axial motor, and can guarantee the structural stability of the stator of the entire axial motor.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A stator of an axial motor comprises:

[0007] A stator core, a plurality of open slots are spaced apart along the circumference of the stator core; and

[0008] A magnetic slot wedge made of a magnetic conductive material is fixed in each open slot. The magnetic slot wedge is sealed at the top opening of the open slot, and the upper end surface of the magnetic slot wedge is overlapped with the upper end surface of the stator core.

[0009] As an optional solution, the magnetic slot wedge comprises a clamping portion, a connecting portion and an overlapping portion connected in sequence. The clamping portion is clamped and fixed in the inner side wall of the open slot, and the overlapping portion is overlapped with the upper end surface of the stator core.

[0010] As an optional solution, the clamping portion comprises two clamping arms arranged in sequence along the width direction of the open slot. The two clamping arms are connected with the connecting portion, and each clamping arm is clamped with the inner side wall of the corresponding side of the open slot.

[0011] As an option, the overlap part comprises two overlap arms arranged along the width direction of the open slot in sequence, both of the overlap arms are connected with the connecting part, and each of the overlap arms overlaps the upper end surface of the stator core.

[0012] As an option, a notch is formed between two adjacent magnetic slot wedges on the upper end surface of the stator core, and the stator of the axial motor further comprises:

[0013] A magnetic conducting block is fixed and arranged in each notch, and the upper end surface of the magnetic conducting block is flush with the upper end surface of the magnetic slot wedge.

[0014] As an option, the magnetic conducting block and the stator core are an integral part, or the magnetic conducting block is fixedly attached to the upper end surface of the stator core.

[0015] As an option, the parts of the plurality of magnetic slot wedges protruding from the upper end surface of the stator core are connected in sequence.

[0016] As an option, the stator core comprises a stator tooth, and one stator tooth is arranged between two adjacent open slots, and the stator of the axial motor further comprises:

[0017] A coil is wound on each stator tooth.

[0018] As an option, the magnetic slot wedge is made of silicon steel sheet, soft magnetic composite material, iron or nickel-iron alloy.

[0019] An axial motor comprises a rotor, and the axial motor further comprises the stator of the axial motor as described above, and the stator of the axial motor is matched with the rotor.

[0020] The beneficial effects of the present application are as follows:

[0021] The utility model provides a kind of stator of axial motor, the stator of axial motor includes stator core and magnetic slot wedge, wherein, multiple open slots are equipped with on stator core along its circumferential spacing, magnetic slot wedge is made of magnetic conductive material, magnetic slot wedge is fixed with in each open slot, magnetic slot wedge is blocked at the top opening of open slot, and the upper end surface of magnetic slot wedge is overlapped on the upper end surface of stator core.The stator of axial motor provided by the utility model, by making magnetic slot wedge be made of magnetic conductive material, and making the upper end surface of magnetic slot wedge be overlapped on the upper end surface of stator core, so that the upper end surface of magnetic slot wedge is higher than the upper end surface of stator core, in the case where magnetic slot wedge of same magnetic conductive material is used, the magnetic leakage of open slot is further increased, effectively increase the inductance of axial motor, and then the weak magnetic capability of axial motor is significantly improved.In addition, by making the upper end surface of magnetic slot wedge be overlapped on the upper end surface of stator core, the contact area of magnetic slot wedge and stator core is improved, the stability of magnetic slot wedge and stator core connection is guaranteed, and the structural stability of the stator of entire axial motor is further guaranteed.

[0022] The utility model also provides a kind of axial motor, by applying the stator of above-mentioned axial motor, the inductance of axial motor is increased, the weak magnetic capability of axial motor is significantly improved, and the structural stability of the stator of entire axial motor is also guaranteed. ACCURACY OF DRAWINGS

[0023] Figure 1 It is the structural schematic diagram of the stator of axial motor provided by the utility model embodiment one;

[0024] Figure 2 It is the front view of the stator of axial motor provided by the utility model embodiment one;

[0025] Figure 3 It is Figure 2 the structure enlarged view of A in;

[0026] Figure 4 It is the structural schematic diagram of the stator of axial motor provided by the utility model embodiment two;

[0027] Figure 5 It is the front view of the stator of axial motor provided by the utility model embodiment two;

[0028] Figure 6 It is Figure 5 the structure enlarged view of B in.

[0029] In the figure:

[0030] 1, stator core; 11, open slot; 12, stator tooth; 2, magnetic slot wedge; 21, clamping part; 211, clamping arm; 22, connecting part; 23, lap joint part; 231, lap joint arm; 24, slot opening; 3, coil; 4, magnetic block. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments.

[0032] In the description of the utility model, unless there is explicit definition and limitation, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate media, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0033] In the utility model, unless there is explicit definition and limitation, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0035] Embodiment one

[0036] In the prior art, the core slots of the stator core in the stator are usually designed in the form of open slots, and a magnetic slot wedge is installed in the open slot, thereby increasing the inductance of the axial motor and improving the field weakening capability of the axial motor. However, the installation of the magnetic slot wedge in the open slot is affected by the magnetic conductivity of the magnetic slot wedge, and the field weakening capability of the axial motor cannot be significantly improved. In addition, the installation stability of the magnetic slot wedge in the open slot cannot be guaranteed, thereby reducing the structural stability of the stator of the entire axial motor.

[0037] To solve the above problems, as shown in Figures 1-3 The embodiment provides a stator of an axial motor, which comprises a stator core 1 and a magnetic slot wedge 2, wherein a plurality of open slots 11 are arranged on the stator core 1 and spaced apart along the circumferential direction of the stator core 1, the magnetic slot wedge 2 is made of a magnetic conductive material, each open slot 11 is fixedly connected with the magnetic slot wedge 2, the magnetic slot wedge 2 is blocked at the top opening of the open slot 11, and the upper end surface of the magnetic slot wedge 2 is overlapped with the upper end surface of the stator core 1. The stator of the axial motor provided by the embodiment is characterized in that the magnetic slot wedge 2 is made of a magnetic conductive material, and the upper end surface of the magnetic slot wedge 2 is overlapped with the upper end surface of the stator core 1, so that the upper end surface of the magnetic slot wedge 2 is higher than the upper end surface of the stator core 1, the magnetic leakage at the open slot 11 is further increased in the case of the magnetic slot wedge 2 made of the same magnetic conductive material, the inductance of the axial motor is effectively increased, and the field weakening capability of the axial motor is significantly improved. In addition, the contact area of the magnetic slot wedge 2 and the stator core 1 is increased by overlapping the upper end surface of the magnetic slot wedge 2 with the upper end surface of the stator core 1, the stability of the connection between the magnetic slot wedge 2 and the stator core 1 is guaranteed, and the structural stability of the stator of the entire axial motor is further guaranteed.

[0038] In the embodiment, as shown in Figures 1-3 The stator core 1 comprises a stator tooth 12, and one stator tooth 12 is arranged between two adjacent open slots 11, and the stator of the axial motor further comprises a coil 3, and the coil 3 is wound around each stator tooth 12.

[0039] Optionally, in the embodiment, the magnetic slot wedge 2 can be made of a silicon steel sheet, the magnetic slot wedge 2 can also be made of a soft magnetic composite material, iron or a nickel-iron alloy, and the magnetic slot wedge 2 can also be made of a mixture of iron powder and a composite material. The specific material of the magnetic slot wedge 2 is not limited in the embodiment, and the specific material of the magnetic slot wedge 2 can be selected according to the performance requirements of the axial motor. It should be noted that when the axial motor has a high requirement on the peak torque and a low requirement on the high-speed performance, the magnetic slot wedge 2 can be made of a material with poor magnetic conductivity, and vice versa.

[0040] In the embodiment, as shown in Figure 3As shown, the magnetic slot wedge 2 comprises a clamping portion 21, a connecting portion 22 and a lapping portion 23 connected in sequence, wherein the clamping portion 21 is clamped and fixed in the inner side wall of the open slot 11, and the lapping portion 23 is lapped on the upper end surface of the stator core 1. The structural design of the magnetic slot wedge 2 further improves the contact area between the magnetic slot wedge 2 and the stator core 1, and further ensures the stability of the connection between the magnetic slot wedge 2 and the stator core 1. It should be noted that when the magnetic slot wedge 2 is installed in the open slot 11, the magnetic slot wedge 2 is inserted into the open slot 11 along the radial direction of the stator core 1.

[0041] Optionally, in the embodiment, as shown in Figure 3 The clamping portion 21 comprises two clamping arms 211 arranged in sequence along the width direction of the open slot 11, both of which are connected with the connecting portion 22, and each clamping arm 211 is clamped with the inner side wall of the corresponding side of the open slot 11. The structural design of the clamping portion 21 enables the clamping portion 21 to be clamped with the inner side wall of the corresponding side of the open slot 11 on both sides along the width direction of the open slot 11, thereby ensuring the stability and reliability of the clamping and fixation of the magnetic slot wedge 2 in the open slot 11.

[0042] Optionally, in the embodiment, as shown in Figure 3 The lapping portion 23 comprises two lapping arms 231 arranged in sequence along the width direction of the open slot 11, both of which are connected with the connecting portion 22, and each lapping arm 231 is lapped on the upper end surface of the stator core 1. The structural design of the lapping portion 23 enables the lapping portion 23 to be lapped on the upper end surface of the stator core 1 on both sides along the width direction of the open slot 11, thereby further ensuring the stability and reliability of the clamping and fixation of the magnetic slot wedge 2 in the open slot 11.

[0043] It should be noted that in the embodiment, as shown in Figure 2 and Figure 3 A slot 24 is formed between the upper end surfaces of the stator core 1 between the two adjacent magnetic slot wedges 2. Specifically, in the embodiment, the slot 24 is formed between the upper end surfaces of the stator core 1 between the lapping portions 23 of the two adjacent magnetic slot wedges 2.

[0044] The embodiment also provides an axial motor, which comprises a rotor and the stator of the axial motor described above, and the stator of the axial motor is matched with the rotor. The axial motor provided by the embodiment increases the inductance of the axial motor by applying the stator of the axial motor described above, significantly improves the field weakening capability of the axial motor, and ensures the structural stability of the stator of the entire axial motor.

[0045] Optionally, in the embodiment, the axial motor can be single-stator single-rotor type, double-stator single-rotor type, double-rotor single-stator type or multi-disc type, and the specific form of the axial motor is not limited in the embodiment.

[0046] Embodiment Two

[0047] The stator of the axial motor provided by the embodiment is basically the same as that of Embodiment One, and the difference between the stator of the axial motor provided by the embodiment and that of Embodiment One is that:

[0048] In the embodiment, as shown in Figures 4-6 The stator of the axial motor further comprises magnetic conductive blocks 4, each of which is fixedly arranged in each slot 24, and the upper end surface of each magnetic conductive block 4 is flush with the upper end surface of the magnetic slot wedge 2. Through the magnetic conductive blocks 4, the slots 24 are filled, thereby relieving the generation of axial motor harmonics, reducing the cogging torque and torque ripple, and reducing the vibration noise of the axial motor.

[0049] Optionally, in the embodiment, the magnetic conductive blocks 4 are fixedly attached to the upper end surface of the stator core 1. Alternatively, in other embodiments, the magnetic conductive blocks 4 and the stator core 1 can be an integrally formed piece.

[0050] Optionally, in other embodiments, the portions of the plurality of magnetic slot wedges 2 protruding from the upper end surface of the stator core 1 are sequentially spliced and connected. Specifically, in other embodiments, the overlapping portions 23 of the plurality of magnetic slot wedges 2 are sequentially spliced and connected on the upper end surface of the stator core 1, thereby avoiding the formation of slots 24 on the upper end surface of the stator core 1, thereby relieving the generation of axial motor harmonics, reducing the cogging torque and torque ripple, and reducing the vibration noise of the axial motor.

[0051] Obviously, the above embodiments of the present application are only examples for the purpose of clear illustration of the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A stator of an axial motor, characterized in that, The application relates to an axial motor stator. The stator core (1) is provided with a plurality of open slots (11) spaced apart along the circumference thereof; and The magnetic slot wedge (2) is made of a magnetic conductive material, is clamped and fixed in each open slot (11), blocks the top opening of the open slot (11), and the upper end surface of the magnetic slot wedge (2) overlaps the upper end surface of the stator core (1). The magnetic slot wedge (2) comprises a clamping portion (21), a connecting portion (22) and an overlapping portion (23) connected in sequence, the clamping portion (21) is clamped and fixed in the inner side wall of the open slot (11), and the overlapping portion (23) overlaps the upper end surface of the stator core (1).

2. A stator for an axial motor according to claim 1, characterised in that The clamping portion (21) comprises two clamping arms (211) arranged in sequence along the width direction of the open slot (11), the two clamping arms (211) are connected with the connecting portion (22), and each clamping arm (211) is clamped with the inner side wall of the corresponding side of the open slot (11).

3. A stator for an axial motor according to claim 2, characterised in that The overlapping portion (23) comprises two overlapping arms (231) arranged in sequence along the width direction of the open slot (11), the two overlapping arms (231) are connected with the connecting portion (22), and each overlapping arm (231) overlaps the upper end surface of the stator core (1).

4. A stator for an axial motor according to claim 2, characterised in that A slot opening (24) is formed between two adjacent magnetic slot wedges (2) on the upper end surface of the stator core (1), and the axial motor stator further comprises:

5. A stator for an axial motor according to any one of claims 1 to 4, characterised in that A magnetic conductive block (4) is fixed and arranged in each slot opening (24), and the upper end surface of the magnetic conductive block (4) is flush with the upper end surface of the magnetic slot wedge (2). The magnetic conductive block (4) and the stator core (1) are an integral molded part, or the magnetic conductive block (4) is adhesively fixed to the upper end surface of the stator core (1).

6. A stator for an axial motor according to claim 5, characterised in that The portions of the plurality of magnetic slot wedges (2) protruding from the upper end surface of the stator core (1) are connected in sequence.

7. A stator for an axial motor according to any one of claims 1 to 4, characterised in that The stator core (1) comprises a stator tooth (12), and one stator tooth (12) is formed between two adjacent open slots (11), and the axial motor stator further comprises:

8. A stator for an axial motor according to any one of claims 1 to 4, characterised in that A coil (3) is wound around each stator tooth (12). The magnetic slot wedge (2) is made of a silicon steel sheet, a soft magnetic composite material, iron or a nickel-iron alloy.

9. A stator for an axial motor according to any one of claims 1 to 4, characterised in that The axial motor further comprises the axial motor stator according to any one of claims 1-9, and the axial motor stator is matched with the rotor.

10. An axial electric machine comprising a rotor, characterized in that ​

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