Motor auxiliary magnetic conductive structure and flat wire motor

Abstract

The utility model discloses a motor auxiliary magnetic conductive structure and a flat wire motor. The motor auxiliary magnetic conduction structure comprises a magnetic conduction part which is formed into a polyhedron formed by stacking a plurality of sheet-shaped bodies and comprises a surface extending in the length direction and a surface extending in the width direction, and the surface extending in the length direction is perpendicular to the surface extending in the width direction; and the insulating part is arranged on the periphery of the magnetic conductive part, the insulating part wraps the magnetic conductive part on the surface along the length direction, and the insulating part is not arranged on the surface along the width direction. The auxiliary magnetic conductive structure provided by the utility model has good magnetic conductivity and insulating property, makes up the defect that the motor stator core needs to be provided with an open slot, enhances the magnetic conductivity of the open slot on the motor stator core, solves the problem of low motor efficiency caused by the fact that a notch needs to be designed into the open slot in process manufacturing, and also has the advantages of simple structure, convenient operation and low cost. And the eddy current loss of magnetic conduction is avoided or reduced by adopting the sheet-shaped body.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor auxiliary magnetic conductive structure and a flat wire motor. Background Art

[0002] Flat-wire motors are increasingly being used in new energy vehicles. The forming and insertion of the flat wire in flat-wire motors is divided into two methods: Hairpin and Wpin. Compared to the insertion method of Hairpin, Wpin utilizes a one-piece molding process, eliminating the need for twisting equipment. This provides better insulation performance, and its shorter end height reduces axial space, increasing power density and making it suitable for high-voltage motors. However, due to its wave-wound design, Wpin requires open slots in the stator core. Open slots, however, result in high magnetic flux leakage, resulting in lower motor efficiency. Utility Model Content

[0003] The embodiments of the utility model provide a motor auxiliary magnetic conductive structure and a flat wire motor, so as to solve the problem of low motor efficiency caused by large magnetic leakage from the existing motor open slots.

[0004] According to one aspect of an embodiment of the present invention, a motor auxiliary magnetic conductive structure is provided, comprising:

[0005] The magnetic conductive portion is formed as a polyhedron formed by stacking a plurality of sheet-like bodies, including a surface extending along the length direction and a surface extending along the width direction, wherein the number of the surfaces extending along the width direction is two, and the number of the surfaces extending along the length direction is multiple, and the surface extending in the length direction is perpendicular to the surface extending in the width direction;

[0006] The insulating portion is arranged on the outer periphery of the magnetic conductive portion, and the insulating portion wraps the magnetic conductive portion on the surface along the length direction, and is not arranged on the surface along the width direction.

[0007] In some embodiments, the motor auxiliary magnetic conductive structure further includes two protrusions, and the two protrusions are arranged on two oppositely arranged surfaces extending along the length direction.

[0008] In some embodiments, the polyhedron includes a first polyhedron and a second polyhedron, and a rectangular intermediate insulating portion is disposed between the first polyhedron and the second polyhedron.

[0009] In some embodiments, the sheet-shaped body is made of any one of the following materials: non-oriented silicon steel, oriented silicon steel, or amorphous magnetic material.

[0010] In some embodiments, the insulating portion is made of any one of the following materials: LCP material, PPS material, PA66 material, epoxy resin, PET material, or PI material.

[0011] In some embodiments, the insulating portion is injection molded; and / or,

[0012] The insulating part is formed by winding multiple layers of films.

[0013] In some embodiments, the thickness of the insulating portion ranges from 0.1 mm to 0.8 mm; and / or,

[0014] The material of the film is PI film or PET film.

[0015] According to another aspect of an embodiment of the present invention, a flat wire motor is provided, which includes a stator core and a flat wire winding. A plurality of open slots are provided on the stator core, and the flat wire winding is passed through the open slots. The open slots are also provided with a motor auxiliary magnetic conductive structure according to any one of the above embodiments.

[0016] In some embodiments, the motor auxiliary magnetic conductive structure is arranged at the opening of the open slot, and is located on a side of the open slot close to the central axis of the motor.

[0017] In some embodiments, the flat wire winding has a wave-wound WP in structure.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The motor auxiliary magnetic conductive structure proposed in the embodiment of the present utility model has good magnetic conductivity and insulation performance, makes up for the defect that open slots need to be set on the motor stator core, realizes the magnetic conductivity enhancement of the open slots on the motor stator core, solves the problem of low motor efficiency caused by designing the slots as open slots due to process manufacturing requirements, and avoids or reduces the eddy current loss of magnetic conductivity by adopting sheet-shaped magnetic conductive bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of a motor auxiliary magnetic conductive structure provided by some embodiments of the present invention;

[0021] Figure 2 It is a schematic cross-sectional structural diagram of a motor auxiliary magnetic conductive structure provided in other embodiments of the present invention.

[0022] Description of the accompanying drawings:

[0023] 1. Insulating part, 11. Edge insulating part, 12. Middle insulating part; 2. Magnetic conductive part, 21. First polyhedron, 22. Second polyhedron; 3. Protrusion; 4. Thin film. DETAILED DESCRIPTION

[0024] The following description sets forth many specific details to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present invention. Therefore, the present invention is not limited to the specific implementations disclosed below.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] In the description of the present invention, reference to terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.

[0028] See also Figure 1-2 As shown, an embodiment of the present utility model discloses a motor auxiliary magnetic conductive structure, comprising:

[0029] The magnetic conductive portion 2 is formed as a polyhedron formed by stacking a plurality of sheet-like bodies, including a surface extending in the length direction and a surface extending in the width direction, wherein the number of surfaces extending in the width direction is two, and the number of surfaces extending in the length direction is multiple, and the surface extending in the length direction is perpendicular to the surface extending in the width direction; wherein the number of multiple includes three or more;

[0030] The insulating portion 1 is arranged on the outer periphery of the magnetic conductive portion, and the insulating portion wraps the magnetic conductive portion on the surface along the length direction, and is not arranged on the surface along the width direction.

[0031] It should be noted that, combined with Figure 1As shown, the surface extending along the width direction is parallel to Figure 1 The cross section (or outer surface) shown, and the surface extending along the length direction is perpendicular to Figure 1 Cross section shown.

[0032] The motor auxiliary magnetic conductive structure provided in this embodiment has good magnetic conductivity and insulation properties by providing a magnetic conductive part 2 and an insulating part 1. It can be provided on the open slots of the motor stator core, thereby making up for the defect that the motor stator core needs to be provided with open slots, and realizing enhanced magnetic conductivity of the open slots on the motor stator core; and, by providing an auxiliary magnetic conductive material structure, it also solves the problem of low motor efficiency caused by designing the slots as open slots due to process manufacturing requirements; on the other hand, by adopting a structure of stacked sheets, the eddy current loss of magnetic conductivity is avoided or reduced.

[0033] In some embodiments, the motor auxiliary magnetic conductive structure further includes two protrusions 3, and the two protrusions 3 are arranged on two oppositely arranged surfaces extending along the length direction.

[0034] Combine Figure 1-2 As shown, the auxiliary magnetic conductive structure of the motor extends outward in the height direction to form a protrusion 3. At this time, a corresponding groove can be opened on the open slot of the stator core to accommodate the protrusion 3.

[0035] It should be pointed out that Figure 1 In the embodiment shown, the protrusion 3 is made of insulating material; Figure 2 In another embodiment shown, the protrusion 3 is mainly formed of magnetic conductive material.

[0036] In some embodiments, the polyhedron includes a first polyhedron 21 and a second polyhedron 22 , and a middle insulating portion 12 in the form of a rectangular parallelepiped is disposed between the first polyhedron 21 and the second polyhedron 22 .

[0037] Combine Figure 1 As shown, the polyhedron includes two parts, namely a first polyhedron 21 and a second polyhedron 22 , a rectangular middle insulating part 12 is provided between the two parts, and an edge insulating part 11 is also provided on the outside of the polyhedron 2 .

[0038] In some embodiments, the sheet-shaped body is made of any one of the following materials: non-oriented silicon steel, oriented silicon steel, or amorphous magnetic material.

[0039] It should be noted that amorphous magnetic materials are solid materials with long-range atomic disorder in their structure and magnetic properties such as ferromagnetism, scattered ferromagnetism, ferrimagnetism, or scattered ferrimagnetism. They are a new type of magnetic material that has rapidly developed since the 1970s. Amorphous magnetic materials were first synthesized by Dewes in 1960 using the liquid quenching method. This functional material has been increasingly used in sensors.

[0040] In some embodiments, the insulating portion is made of any one of the following materials: LCP material, PPS material, PA66 material, epoxy resin, PET material, or PI material.

[0041] The above-mentioned LCP material, PPS material, PA66 material, etc. are all insulating polymer materials. Of course, other insulating materials with similar or equivalent functions are also within the protection scope of this embodiment.

[0042] In some embodiments, combined Figure 1 As shown, the insulating part 1 is injection molded and cast by designing a corresponding mold, which is easy to process.

[0043] It should be noted that if the magnetic conductive part consists of two parts, the middle insulating part and the edge insulating part are both manufactured in one piece by injection molding. If the magnetic conductive part consists of only one part, the insulating part only includes the edge insulating part.

[0044] In other embodiments, combined Figure 2 As shown, the insulating part 1 can also be formed by winding multiple layers of thin films. In this case, the magnetic conductive part is formed by Figure 2 As shown, the housing is composed of two separate parts, and each part extends outward to form the protrusion 3.

[0045] In some optional embodiments, combined with Figure 2 As shown, the thickness of the insulating portion 1 (especially the edge insulating portion 11 ) ranges from 0.1 mm to 0.8 mm, and the film 4 is made of PI film or PET film.

[0046] Optionally, the thickness of the edge insulation portion 11 formed by winding may be slightly smaller than the thickness of the injection molding, and may be in the range of 0.15 mm to 0.5 mm.

[0047] Continue to see Figure 2 When the edge insulating portion 11 is made by winding, the material of the middle insulating portion 12 and the material of the edge insulating portion 11 can be the same or different, preferably different. For example, the material of the film is PI film or PET film, and the middle insulating portion 12 is made of LCP material, PPS material, PA66 material, epoxy resin or other plastics.

[0048] According to another aspect of an embodiment of the present invention, a flat wire motor is provided, which includes a stator core and a flat wire winding. A plurality of open slots are provided on the stator core, and the flat wire winding is passed through the open slots. The open slots are also provided with a motor auxiliary magnetic conductive structure according to any one of the above embodiments.

[0049] In some embodiments, the motor auxiliary magnetic conductive structure is arranged at the opening of the opening slot, and is located on a side of the opening slot close to the central axis of the motor.

[0050] In some embodiments, the flat wire winding has a W-Pi n structure.

[0051] It should be noted that although the present invention is disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A motor auxiliary magnetic conductive structure, characterized in that: The motor auxiliary magnetic conductive structure includes: The magnetic conductive portion is formed as a polyhedron formed by stacking a plurality of sheet-like bodies, including a surface extending along the length direction and a surface extending along the width direction, wherein the number of the surfaces extending along the width direction is two and the number of the surfaces extending along the length direction is multiple, and the surfaces extending along the length direction are perpendicular to the surfaces extending along the width direction; The insulating portion is arranged on the outer periphery of the magnetic conductive portion, and the insulating portion wraps the magnetic conductive portion on the surface along the length direction, and is not arranged on the surface along the width direction.

2. The motor-assisted magnetic conductive structure according to claim 1, characterized in that: The motor auxiliary magnetic conductive structure further includes two protrusions, and the two protrusions are arranged on two oppositely arranged surfaces extending along the length direction.

3. The motor-assisted magnetic conductive structure according to claim 1, characterized in that: The polyhedron includes a first polyhedron and a second polyhedron, and a middle insulating portion in the form of a rectangular parallelepiped is provided between the first polyhedron and the second polyhedron.

4. The motor-assisted magnetic conductive structure according to claim 1, characterized in that: The material of the sheet body is selected from any one of the following: non-oriented silicon steel, oriented silicon steel or amorphous magnetic material.

5. The motor-assisted magnetic conductive structure according to any one of claims 1 to 4, characterized in that: The material of the insulating part is selected from any one of the following: LCP material, PPS material, PA66 material, epoxy resin, PET material or PI material.

6. The motor-assisted magnetic conductive structure according to any one of claims 1 to 4, characterized in that: The insulating portion is injection molded; and / or, The insulating part is formed by winding multiple layers of films.

7. The motor-assisted magnetic conductive structure according to claim 6, characterized in that: The thickness of the insulating portion ranges from 0.1 mm to 0.8 mm; and / or, The material of the film is PI film or PET film.

8. A flat wire motor comprising a stator core and a flat wire winding, characterized in that: The stator core is provided with a plurality of open slots, the flat wire winding is passed through the open slots, and the motor auxiliary magnetic conductive structure according to any one of claims 1 to 7 is also provided in the open slots.

9. The flat wire motor according to claim 8, characterized in that: The motor auxiliary magnetic conductive structure is arranged at the opening of the open slot, and is located on a side of the open slot close to the central axis of the motor.

10. The flat wire motor according to claim 8, characterized in that The flat wire winding has a W-Pin structure.

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