CN113937915B - Axial magnetic flux stator core made of composite material - Google Patents
Axial magnetic flux stator core made of composite material Download PDFInfo
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- CN113937915B CN113937915B CN202111058839.7A CN202111058839A CN113937915B CN 113937915 B CN113937915 B CN 113937915B CN 202111058839 A CN202111058839 A CN 202111058839A CN 113937915 B CN113937915 B CN 113937915B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
- H02K15/026—Wound cores
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/12—Machines characterised by the modularity of some components
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to an axial magnetic flux stator core made of a composite material, which comprises a stator yoke part, a plurality of magnetic conduction connectors, a magnetic conduction sandwich core, a magnetic conduction inner core and a magnetic slot wedge. The magnetic conduction inner core guides the magnetic conduction sandwich to form a proper shape, and the magnetic conduction sandwich is formed by winding an amorphous alloy strip. After the magnetic conduction inner core and the magnetic conduction sandwich core are combined, the magnetic conduction inner core is adhered to the inside of the deep groove structure of the magnetic conduction connector. The fixed slot wedges of the plurality of magnetic conductive connectors are connected with the slots of the stator yoke. The magnetic slot wedge is pushed into the slot wedge hole of the adjacent magnetic conductive connector. The axial magnetic flux stator core fully utilizes the advantages of low iron loss of amorphous alloy materials, high plasticity of soft magnetic materials and high saturation magnetic density of traditional silicon steel materials. The tooth part of the stator core is designed in a modularized manner, so that automatic winding can be realized, and the labor productivity is improved.
Description
Technical Field
The invention relates to an axial magnetic flux stator core made of a composite material, and belongs to the field of stator structural design.
Background
With the arrival of energy crisis, the motor demand for energy conservation and high efficiency is more urgent. Compared with the traditional silicon steel material, the amorphous alloy material has the characteristics of thin thickness, high resistivity and high relative magnetic permeability. When the amorphous material is the strip material prepared initially, the loss is only 1/5-1/8 of that of the traditional silicon steel material, so that the efficiency of the motor can be obviously increased after the amorphous material is applied to the manufacturing of the motor stator core, and the energy-saving effect is achieved. However, the amorphous alloy material is significantly affected by stress, and particularly, the crystallization of the amorphous material can be caused by adopting processes such as laser cutting, electric spark cutting or water jet cutting, so that the advantage of low iron loss of the amorphous material after being manufactured into a stator core is greatly weakened.
The soft magnetic material is formed by pressing metal powder particles with insulation on the surface, and a proper mold is designed to press the soft magnetic material, so that a richer topological structure than that of the traditional silicon steel material can be achieved. However, compared with silicon steel materials, the soft magnetic material has low saturation magnetic density, low magnetic permeability and large hysteresis loss, so that the proportion of the soft magnetic material used for designing the low-iron-loss stator core is not too large.
Currently, related patents directed to axial flux stator cores can be categorized into the following categories: 1. a method of fixing a segmented stator core (refer to chinese patent application number CN 202010953641.4); 2. a method for manufacturing a stator core of a segmented armature axial flux motor (refer to chinese patent application number CN 202010836068.9); 3. a water cooling structure of an axial flux motor stator core (refer to chinese patent application number CN 201710971588.9); none of the above patents mention an axial flux stator core made of amorphous alloy, soft magnetic material and silicon steel material.
An axial magnetic field motor, a stator structure and a stator core structure of the axial magnetic field motor, and a Chinese patent application No. CN202010953641.4, which are the most similar to the invention, introduce a modularized manufacturing and assembling method of the axial magnetic flux motor, wherein amorphous alloy, soft magnetic material and silicon steel material are not adopted to manufacture the stator core, and the modularized manufacturing method of the axial magnetic field motor is different from the above patent.
Disclosure of Invention
The invention fully utilizes the advantages of low iron loss of amorphous alloy materials, high plasticity of soft magnetic materials and high saturation magnetic density of traditional silicon steel materials, reduces the disadvantages of remarkable influence of the process on amorphous alloys, low saturation magnetic density of soft magnetic materials, low magnetic permeability, large hysteresis loss and high iron loss of silicon steel materials, and provides an axial magnetic flux stator core.
The technical scheme of the invention is as follows:
an axial magnetic flux stator core made of composite materials mainly comprises a stator yoke part 1, a plurality of split components and a plurality of magnetic slot wedges 5; each split component comprises a magnetic conduction connecting body 2, a magnetic conduction clamping core 3 and a magnetic conduction inner core 4, wherein the magnetic conduction clamping core 3 is arranged at the inner side of the magnetic conduction connecting body 2, and the magnetic conduction connecting body 2 is arranged at the inner side of the magnetic conduction clamping core 3; the lower end of the magnetic conductive connecting body 2 is provided with a fixed slot wedge 7 protruding outwards, and slot wedge holes 8 are arranged at positions, close to the upper end, of two sides of the magnetic conductive connecting body 2; the upper ends of the adjacent split members are connected by pushing the magnetic slot wedges 5 into slot wedge holes 8 of the adjacent magnetic conductive connecting bodies 2;
the stator yoke part 1 is of a cylindrical structure, and a plurality of inwards recessed slotted holes 6 are formed in the upper part of the stator yoke part 1 along the circumference; the opening trend of the slot 6 is arranged along the radial direction of the stator yoke part 1; the fixed slot wedge 7 of the magnetic conductive connector 2 is matched and connected with the slot 6 of the stator yoke part 1.
Preferably, the stator yoke 1 is formed by stacking multiple layers of silicon steel sheets into a cylindrical structure along the axial direction, and after the stator yoke 1 is subjected to annealing, vacuum paint dipping and curing, laser cutting, electric spark cutting or water jet cutting is performed above the cylindrical structure to machine a plurality of inwards concave slots 6.
Preferably, the magnetically conductive connector 2 is made of a soft magnetic material by pressing.
Preferably, the upper part of the magnetic conductive connector 2 is a deep groove structure, and the magnetic conductive sandwich 3 and the magnetic conductive inner core 4 are arranged inside the deep groove structure.
Preferably, the magnetic conductive sandwich 3 is in a cylindrical structure.
Preferably, the magnetic conductive sandwich 3 is formed by winding an amorphous alloy strip along the magnetic conductive inner core 4, laminating tightly, annealing, impregnating, shaping and solidifying.
Preferably, the magnetic conductive inner core 4 is formed by axially laminating a plurality of layers of silicon steel sheets, and then annealing, paint dipping, shaping and curing.
Optionally, the magnetically conductive inner core 4 is formed by pressing a soft magnetic material.
Preferably, the magnetic slot wedge 5 is a strip with two protruding ends and magnetic conductivity, and the protruding shape and the concave shape of the adjacent magnetic conductive connector 2 form an assembly matching relationship.
When in assembly, the lower parts of the magnetic conduction sandwich 3 and the magnetic conduction inner core 4 are coated with adhesive, and the adhesive is adhered to the inside of the deep groove structure of the magnetic conduction connector 2, so as to manufacture the split component; the split component is put into a winding machine for winding, so that a part below the slot wedge hole 8 of the magnetic conductive connector 2 is wound with a winding 9 with proper turns; pushing a plurality of magnetic conduction connectors 2 with windings 9 into the stator yoke part 1 for fixing, wherein the fixed slot wedges 7 of the magnetic conduction connectors 2 are matched with the slot holes 6 of the stator yoke part 1; then, pushing the magnetic slot wedge 5 into the slot wedge hole 8 of the adjacent magnetic conductive connector 2; the entire assembled stator core with windings 9 is annealed, vacuum painted, cured and potted to form an axial flux stator core using a composite material.
The invention has the beneficial effects that:
1. the amorphous alloy material is obviously affected by the process, and after the amorphous alloy strip is wound, the traditional process is a process of carrying out laser cutting, electric spark cutting or water jet cutting grooving on the amorphous alloy cylinder, and the laser cutting, electric spark cutting or water jet cutting process can greatly weaken the low iron loss advantage of the amorphous alloy material. The invention fully utilizes the advantage of low iron loss of the amorphous material, reduces the manufacturing process flow of the amorphous alloy material, and does not need to use laser cutting, electric spark cutting or water jet cutting process, thereby reducing the performance loss from the amorphous strip to the amorphous iron core caused by the manufacturing process.
2. The magnetic conduction connector 2 has a complex structure, if the traditional silicon steel material is adopted for manufacturing, a large amount of silicon steel material is wasted, and under the condition of ensuring the same structural strength, the silicon steel material needs to occupy a larger space structure, so that the space of the magnetic conduction sandwich 3 is occupied, the occupation ratio of the amorphous alloy material is reduced, and the iron loss of the stator core is improved. The invention fully utilizes the high plasticity advantage of the soft magnetic material and increases the duty ratio of the amorphous alloy material as much as possible.
3. The invention fully utilizes the advantages of high saturation magnetic density and material stability of the silicon steel material, adopts the traditional silicon steel material for the stator yoke part 1, and enables the yoke part serving as a part of a magnetic circuit to pass through a stronger magnetic field, thereby reducing the thickness of the yoke part when the motor is designed, and further reducing the volume of the stator core.
4. The traditional winding method requires a great deal of manual participation, and is difficult to realize mechanization and automation. The invention carries out modularized design on the tooth part of the stator, and coils of the concentrated winding 9 can be wound on the magnetic conductive connector 2 in advance, thereby realizing automatic winding and improving labor production efficiency.
Drawings
The invention has the following drawings:
fig. 1 is a schematic structural view of a stator core according to the present invention;
fig. 2 is a schematic structural view of a stator yoke in a stator core according to the present invention;
FIG. 3 is a schematic diagram of an exploded view of stator teeth in a stator core according to the present invention;
FIG. 4 is a schematic diagram of a semi-sectional structure of a magnetically permeable connector in a stator core according to the present invention;
FIG. 5 is a schematic view of the structure of a magnetic slot wedge of the present invention;
fig. 6 is a schematic diagram of an assembled structure of a stator core and windings according to the present invention.
Reference numerals illustrate:
1-a stator yoke; 2-a magnetic conductive connector; 3-a magnetic conduction sandwich;
4, a magnetic conduction inner core; 5-magnetic slot wedge; 6-a slot;
7-fixing the slot wedge; 8-slot wedge holes; 9-winding.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Please refer to fig. 1 to 6 in combination. The invention provides an axial magnetic flux stator core made of composite materials, which mainly comprises: the magnetic conduction yoke part comprises a stator yoke part 1, a plurality of magnetic conduction connecting bodies 2, a plurality of magnetic conduction clamping cores 3, a plurality of magnetic conduction inner cores 4 and a plurality of magnetic slot wedges 5; the magnetic conduction connecting bodies 2 are arranged on the stator yoke 1, the magnetic conduction clamping cores 3 are respectively arranged on the inner sides of the magnetic conduction connecting bodies 2, the magnetic conduction inner cores 4 are respectively arranged on the inner sides of the magnetic conduction clamping cores 3, and the magnetic slot wedges 5 are respectively arranged between the adjacent magnetic conduction connecting bodies 2.
In the implementation process of the invention, the stator yoke part 1 is formed by axially laminating a plurality of layers of silicon steel sheets into a cylindrical structure. After the stator yoke 1 is subjected to annealing, vacuum paint dipping and curing, laser cutting, electric spark cutting or water jet cutting is performed on the upper part of the cylindrical structure, and a plurality of inwards concave slots 6 are machined. The slot 6 is matched with the fixed slot wedge 7 of the magnetic conductive connector 2.
The magnetic conductive connector 2 is formed by pressing soft magnetic materials, and the lower end of the magnetic conductive connector 2 is provided with a fixing slot wedge 7 protruding outwards. The upper part of the magnetic conduction connector 2 is of a deep groove structure, and the magnetic conduction sandwich 3 and the magnetic conduction inner core 4 are arranged inside the deep groove structure. The two sides of the magnetic conductive connecting body 2 are provided with slot wedge holes 8 near the upper end, and the magnetic slot wedges 5 are matched with the slot wedge holes 8.
The magnetic conduction sandwich 3 is of a tubular structure, the inner side of the magnetic conduction sandwich 3 is provided with a magnetic conduction inner core 4, and the outer side of the magnetic conduction sandwich 3 is provided with a magnetic conduction connector 2. The magnetic conduction sandwich 3 is formed by winding amorphous alloy strips along the magnetic conduction inner core 4, and the amorphous alloy strips are subjected to annealing, paint dipping and shaping solidification after being laminated tightly, so that the magnetic conduction sandwich 3 is finally formed.
The magnetic conduction inner core 4 is made of a plurality of layers of axially laminated silicon steel sheets through annealing, paint dipping, shaping and curing. In addition, the magnetically conductive inner core 4 may be formed by pressing a soft magnetic material, which is not limited in the present invention. The magnetic conduction inner core 4 is positioned at the inner side of the magnetic conduction sandwich core 3 and guides the magnetic conduction sandwich core 3 to form a proper shape.
The magnetic slot wedge 5 is a strip-shaped body with two protruding ends and magnetic conductivity, and the protruding shape and the concave shape of the slot wedge hole 8 of the adjacent magnetic conductive connector 2 form an assembly matching relationship.
During assembly, the lower part of the combined module with the magnetic conduction inner core 4 and the magnetic conduction sandwich 3 is coated with adhesive, and the combined module is primarily adhered to the inside of the deep groove structure of the magnetic conduction connector 2. The magnetic conductive connector 2 is placed into a winding machine for winding, so that a part below the slot wedge hole 8 of the magnetic conductive connector 2 is wound with a winding 9 with proper turns. The plurality of magnetic conductive connectors 2 with windings 9 are pushed into the stator yoke 1 for fixing, and the fixed slot wedges 7 of the magnetic conductive connectors 2 are matched with the slots 6 of the stator yoke 1. The magnetic slot wedge 5 is then pushed into the slot wedge hole 8 of the adjacent magnetically conductive connector 2. The whole stator core with the windings 9 assembled is annealed, vacuum painted, cured and potted.
While the invention has been described with respect to the preferred embodiments, it is to be understood that the invention is not limited thereto, but is capable of modification without materially departing from the novel teachings and advantages of the invention.
What is not described in detail in the present specification belongs to the prior art known to those skilled in the art.
Claims (5)
1. An axial magnetic flux stator core made of composite materials is characterized by comprising a stator yoke part (1), a plurality of split components and a plurality of magnetic slot wedges (5); each split component comprises a magnetic conduction connecting body (2), a magnetic conduction clamping core (3) and a magnetic conduction inner core (4), wherein the magnetic conduction clamping core (3) is arranged at the inner side of the magnetic conduction connecting body (2), and the magnetic conduction inner core (4) is arranged at the inner side of the magnetic conduction clamping core (3); the lower end of the magnetic conduction connecting body (2) is provided with a fixed slot wedge (7) protruding outwards, and slot wedge holes (8) are arranged at positions, close to the upper end, of two sides of the magnetic conduction connecting body (2); the upper ends of the adjacent split members are connected by pushing the magnetic slot wedges (5) into slot wedge holes (8) of the adjacent magnetic conductive connecting bodies (2);
the stator yoke part (1) is of a cylindrical structure, and a plurality of inwards concave slotted holes (6) are formed in the upper part of the stator yoke part (1) along the circumference; the open trend of the slot holes (6) is arranged along the radial direction of the stator yoke part (1); the fixed slot wedge (7) of the magnetic conduction connector (2) is matched and connected with the slot hole (6) of the stator yoke part (1);
the magnetic conduction connector (2) is formed by pressing a soft magnetic material;
the magnetic conduction sandwich (3) is formed by winding an amorphous alloy strip along the magnetic conduction inner core (4), laminating tightly, annealing, impregnating, shaping and solidifying;
the magnetic conduction inner core (4) is formed by axially laminating a plurality of layers of silicon steel sheets, and then annealing, paint dipping, shaping and curing;
the magnetic slot wedge (5) is a strip body with two protruding ends and magnetic conductivity, and the protruding shape and the concave shape of the adjacent magnetic conductive connector (2) form an assembly matching relationship.
2. An axial flux stator core using a composite material as defined in claim 1, wherein: the stator yoke (1) is formed by axially laminating a plurality of layers of silicon steel sheets into a cylindrical structure, and a plurality of inwards concave slotted holes (6) are processed by performing laser cutting, electric spark cutting or water jet cutting on the upper part of the cylindrical structure after the stator yoke (1) is subjected to annealing, vacuum paint dipping and solidification.
3. An axial flux stator core using a composite material as defined in claim 1, wherein: the upper part of the magnetic conduction connector (2) is of a deep groove structure, and the magnetic conduction sandwich (3) and the magnetic conduction inner core (4) are arranged inside the deep groove structure.
4. An axial flux stator core using a composite material as defined in claim 1, wherein: the magnetic conduction sandwich (3) is of a cylindrical structure.
5. An axial flux stator core using a composite material as defined in claim 1, wherein: when in assembly, the lower parts of the magnetic conduction sandwich core (3) and the magnetic conduction inner core (4) are coated with adhesive, and the adhesive is adhered to the inside of the deep groove structure of the magnetic conduction connector (2) to manufacture the split component; the split component is put into a winding machine for winding, so that a part below a slot wedge hole (8) of the magnetic conductive connecting body (2) is wound with a winding (9) with proper turns; pushing a plurality of magnetic conduction connectors (2) with windings (9) into the stator yoke (1) for fixing, wherein a fixed slot wedge (7) of the magnetic conduction connectors (2) is matched with a slot hole (6) of the stator yoke (1); then, pushing the magnetic slot wedge (5) into the slot wedge hole (8) of the adjacent magnetic conductive connecting body (2); and annealing, vacuum impregnating, curing and encapsulating the whole assembled stator core with the windings (9) to form the axial magnetic flux stator core made of the composite material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111058839.7A CN113937915B (en) | 2021-09-09 | 2021-09-09 | Axial magnetic flux stator core made of composite material |
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| CN202111058839.7A CN113937915B (en) | 2021-09-09 | 2021-09-09 | Axial magnetic flux stator core made of composite material |
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| CN113937915A CN113937915A (en) | 2022-01-14 |
| CN113937915B true CN113937915B (en) | 2023-09-26 |
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| CN114421659B (en) * | 2022-01-26 | 2023-10-27 | 丽水方德智驱应用技术研究院有限公司 | Stator and flat wire motor adapting to temperature zone distribution characteristics |
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