CN218957408U - Motor insulation structure, motor and electronic device - Google Patents
Motor insulation structure, motor and electronic device Download PDFInfo
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- CN218957408U CN218957408U CN202220766713.9U CN202220766713U CN218957408U CN 218957408 U CN218957408 U CN 218957408U CN 202220766713 U CN202220766713 U CN 202220766713U CN 218957408 U CN218957408 U CN 218957408U
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- 238000009413 insulation Methods 0.000 title claims description 34
- 239000002131 composite material Substances 0.000 claims abstract description 65
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 52
- 239000004760 aramid Substances 0.000 claims abstract description 51
- 239000010445 mica Substances 0.000 claims abstract description 41
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 41
- 239000010410 layer Substances 0.000 claims description 71
- 239000012790 adhesive layer Substances 0.000 claims description 26
- 239000012774 insulation material Substances 0.000 claims description 17
- 229920001721 polyimide Polymers 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 abstract description 44
- 239000003973 paint Substances 0.000 abstract description 9
- 230000003678 scratch resistant effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 229920000784 Nomex Polymers 0.000 description 9
- 239000004763 nomex Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 229920006267 polyester film Polymers 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The disclosure relates to the technical field of insulating materials, in particular to a corona-resistant insulating structure of a motor, the motor and an electronic device. The composite insulating material comprises a first meta-position aramid paper layer, a first film, a mica paper layer, a second film and a second meta-position aramid paper layer which are sequentially arranged from top to bottom. The composite insulating material provided by the embodiment of the disclosure provides heat-resistant protection and scratch-resistant protection through meta-aramid paper arranged on the outer surface, and can effectively adsorb insulating paint and improve the impregnating saturation of the insulating paint. The mica paper can improve corona resistance of the composite material and effectively reduce partial discharge capacity, and is positioned in the center of the composite insulating material, so that the mica paper is comprehensively protected.
Description
Technical Field
The disclosure relates to the technical field of insulating materials, in particular to a motor insulating structure, a motor and an electronic device.
Background
When the motor is controlled by a high frequency inverter and the operating voltage is raised to 800V and above, partial discharge and corona phenomenon are inevitably generated. In order to prolong the service life and operational reliability of the motor, it is necessary to improve corona resistance of the insulating material and to effectively reduce the partial discharge amount. Meanwhile, mechanical damage such as scraping and scratching to the insulating material can be inevitably generated in the mounting process of the insulating material, so that the scraping resistance of the insulating material needs to be further improved. The existing insulating materials cannot meet the requirements at the same time.
In view of this, the present disclosure is specifically proposed.
Disclosure of Invention
In order to solve the technical problems, the disclosure provides a corona-resistant motor insulation structure, a motor and an electronic device.
The present disclosure provides a composite insulation material, comprising a first meta-aramid paper layer, a first film, a mica paper layer, a second film and a second meta-aramid paper layer, which are sequentially arranged from top to bottom; a first adhesive layer is arranged between the first meta-aramid paper layer and the first film; a second adhesive layer is arranged between the first film and the mica paper layer; a third adhesive layer is arranged between the mica paper layer and the second film; a fourth adhesive layer is arranged between the second film and the second meta-aramid paper layer; the adhesive layer is used for fixedly bonding two adjacent layers.
Alternatively, the first film is selected from polyimide films and polyester films, and the second film is selected from polyimide films and polyester films.
Alternatively, the thickness of the polyimide film is 0.025mm to 0.125mm, and the thickness of the polyester film is 0.025mm to 0.125mm.
Optionally, the thickness of the first meta-aramid paper layer is 0.04 mm-0.13 mm; the thickness of the second meta-aramid paper layer is 0.04 mm-0.13 mm.
Optionally, the thickness of the mica paper layer is 0.03 mm-0.05 mm.
Optionally, the thickness of the composite insulating material is 0.15 mm-0.35 mm.
The present disclosure provides a corona resistant insulation structure for an electric machine, comprising the above composite insulation material.
The present disclosure provides a motor comprising the above-described motor corona-resistant insulation structure.
The present disclosure provides an electronic device comprising the above motor.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the composite insulating material provided by the embodiment of the disclosure provides heat-resistant protection and scratch-resistant protection through the double-layer meta-aramid paper arranged on the outer surface, and can effectively adsorb insulating paint and improve the impregnating saturation of the insulating paint.
The mica paper in the embodiment of the disclosure can improve corona resistance of the composite material and effectively reduce partial discharge capacity. The mica paper is positioned at the center of the composite insulating material, and meta-aramid paper layers and films are arranged on two sides of the mica paper, so that the mica paper is comprehensively protected.
The composite insulating material in the embodiment of the disclosure contains a double-layer film, so that the mechanical strength and the electrical strength of the composite material are greatly improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic structural view of a composite insulating material according to an embodiment of the present disclosure;
wherein:
1-a first meta-aramid paper layer;
2-a first film;
3-mica paper layer;
4-a second film;
5-a second meta-aramid paper layer;
6-an adhesive layer;
61-a first adhesive layer;
62-a second adhesive layer;
63-a third adhesive layer;
64-fourth adhesive layer.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the disclosure provides a composite insulating material, in particular to a composite insulating material applied to motor slot insulation and slot cover paper insulation, which comprises a first meta-aramid paper layer 1, a first film 2, a mica paper layer 3, a second film 4 and a second meta-aramid paper layer 5 which are sequentially arranged from top to bottom, wherein the structural schematic diagram of the composite insulating material is shown in figure 1.
In a specific implementation manner of the composite insulating material of the embodiment of the disclosure, the mica paper layer is located at the center of the composite insulating material, and meta-aramid paper layers and films are arranged on two sides of the mica paper layer. The film is positioned in the center of the meta-aramid paper layer and the mica paper layer, and has better mechanical strength and compactness, so that the film is used as a framework of the composite insulating material, the mechanical strength and the electrical strength of the composite insulating material can be remarkably improved, the mechanical advantage of the composite insulating material can be furthest exerted, and the convenience of preparation can be improved. The two layers of meta-aramid paper positioned on the outermost layer provide heat-resistant protection and scratch-resistant protection, insulating paint can be effectively adsorbed to improve the impregnating saturation of the insulating paint, the mechanical strength and the electrical strength of the composite material are greatly improved through the double-layer film structure, and the corona resistance of the composite material can be improved through mica paper, so that the partial discharge capacity is effectively reduced.
Further, as shown in fig. 1, the adhesive layer 6 is used for fixedly bonding two adjacent layers, specifically, a first adhesive layer 61 is disposed between the first meta-aramid paper layer 1 and the first film 2, a second adhesive layer 62 is disposed between the first film 2 and the mica paper layer 3, a third adhesive layer 63 is disposed between the mica paper layer 3 and the second film 4, and a fourth adhesive layer 64 is disposed between the second film 4 and the second meta-aramid paper layer 5.
Compared with para-aramid (aramid 1414) materials, the meta-aramid materials have stronger high-temperature insulation resistance, and the temperature index is 210 ℃ or above. Therefore, the method selects the meta-aramid paper as the raw material. In a preferred embodiment, NOMEX paper from DuPont is selected. NOMEX paper uses NOMEX short fibers and NOMEX fibrids as paper making raw materials. Wherein, the short fiber is made by cutting NOMEX filaments for papermaking into 6mm, and the short fiber mainly contributes to the mechanical strength of the paper; the fibrids are fed from NOMEX polymer solution through nozzle into NOMEX precipitating agent rotating at high speed under the action of strong shearing forceThe polymer is dispersed and solidified into a thin fiber floccule with a two-dimensional structure, which is formed by filling and bonding short fibers in a NOMEX paper sheet structure. Meta-aramid paper with similar parameters to NOMEX paper from other companies can also be selected. In particular, in order to further improve the scratch resistance, the embodiment of the disclosure further preferably uses compact meta-aramid paper, and the compact fiber structure enables the composite insulation material to have good scratch resistance and adsorptivity of the insulation paint. The meta-aramid paper comprises the following specific optional types:
416LAM、
464LAM、/>
564。
the aramid paper selected by the embodiment of the disclosure has good absorbability, so that the aramid paper is arranged on the upper surface and the lower surface of the composite insulating material, insulating paint can be effectively adsorbed, and the saturation of the composite insulating material to the impregnating of the insulating paint is improved.
In the composite insulating material of the embodiment of the disclosure, the thickness of the first meta-aramid paper layer is 0.04 mm-0.13 mm, and the thickness of the second meta-aramid paper layer is 0.04 mm-0.13 mm, and when the composite insulating material contains two meta-aramid paper layers, the thicknesses of the two meta-aramid paper layers can be the same or different. The meta-aramid paper layer within the thickness range can ensure that the mechanical property and scratch resistance of the composite insulating material are optimal. In specific examples, the meta-aramid paper layer may have a thickness of 0.04mm, 0.05mm, 0.08mm, 0.13mm. Because of the dimensional requirements of the composite insulation material in motor slot insulation and slot cover paper insulation applications, the overall thickness of the composite insulation material should not exceed the dimensional requirements. If the meta-aramid paper layer is too thick, the overall thickness of the composite insulation material is exceeded.
In the composite insulating material of the embodiment of the present disclosure, the first film and the second film are independently selected from polyimide film (PI film) and polyester film (polyester film). The thickness of the two films can be the same or different. In particular, the requirements of the composite insulating material on mechanical properties and the overall thickness can be determined. The polyimide film comprises two types of benzene-type polyimide film and biphenyl-type polyimide film, and the polyimide film has excellent heat resistance, electric strength, mechanical property and chemical stability, and can greatly improve the electric strength performance of the composite material. Polyimide films can be used in H-grade and above temperature grade insulation systems. The polyester film is a film material prepared by taking polyethylene terephthalate as a raw material, adopting an extrusion method to prepare a thick sheet, and then stretching. The polyester film has excellent electrical property, mechanical property and chemical stability, and can greatly improve the electrical strength performance of the composite material.
In terms of selection of the thickness, the thickness of the polyimide film is 0.025-0.125 mm, and the thickness of the polyester film is 0.025-0.125 mm. The film within the thickness range can ensure the electrical property and mechanical property of the composite insulating material and the molding condition in the preparation process. Because of the dimensional requirements of the composite insulation material in motor slot insulation and slot cover paper insulation applications, the overall thickness of the composite insulation material should not exceed the dimensional requirements. If the thickness of the film is too large, the overall thickness of the composite insulation material is exceeded.
In the composite insulating material of the embodiment of the disclosure, the mica paper is made from mica serving as a main raw material through a paper making process. Mica belongs to inorganic materials, has extremely high heat resistance, has good electrical strength in a lamellar/layered structure, effectively reduces partial discharge capacity and improves corona resistance. The composite insulating material of the embodiment of the disclosure contains two layers of mica paper, so that the growth path of the electric branch can be effectively prolonged, and the corona resistance of the composite material is obviously improved. The thickness of the two layers of mica paper can be the same or different, and can be specifically determined according to the requirements of the composite material on corona resistance and the overall thickness.
In terms of selection of thickness, the thickness of the mica paper layer is 0.03-0.05 mm, and particularly 0.04mm can be adopted. The mica paper layer within the thickness range can ensure the best mechanical property and corona resistance of the composite insulating material. Because of the dimensional requirements of the composite insulation material in motor slot insulation and slot cover paper insulation applications, the overall thickness of the composite insulation material should not exceed the dimensional requirements. If the thickness of the mica paper layer is too large, the overall thickness of the composite insulation material is exceeded.
In the composite insulating material of the embodiment of the disclosure, the thicknesses of the first adhesive layer, the second adhesive layer, the third adhesive layer and the fourth adhesive layer are respectively 0.01mm.
In the composite insulating material of the embodiment of the disclosure, the overall thickness of the composite insulating material is 0.15mm to 0.35mm. Based on the application of the composite insulating material in motor slot insulation and slot cover paper insulation, the thickness of the composite insulating material should meet the requirement of the thickness range. The overall thickness of the composite insulation should not exceed this dimensional requirement.
The second aspect of the disclosed embodiment provides a preparation method of the composite insulating material, which at least comprises the following steps of;
s1, uniformly coating an adhesive on the upper surface and the lower surface of a first film, preparing a first meta-position aramid paper layer and a mica paper layer on the upper surface and the lower surface of the first film, and curing to obtain a three-layer composite structure of the first meta-position aramid paper layer-the first film-the mica paper layer;
s2, uniformly coating an adhesive on the surface of the mica paper, preparing a second film on the mica paper, and curing;
and S3, uniformly coating the adhesive on the surface of the second film, preparing a second meta-aramid paper layer on the second film, and curing to obtain the composite insulating material.
In the preparation method of the embodiment of the disclosure, the film with better mechanical property is used as a core, and the other layers are stacked layer by layer, so that the preparation is easier. Wherein, the curing mode is selected according to the type of the adhesive. For example, a heat-resistant polyurethane adhesive or an epoxy adhesive may be selected, and heat-cured, and preferably heat-cured, to obtain a flat product.
The embodiment of the disclosure also provides a corona-resistant motor insulation structure (Insulation structure of corona resistant motor) comprising the composite insulation material disclosed by the embodiment of the disclosure. The corona-resistant motor insulation structure is formed by integrating corona-resistant enameled wires, impregnating resin, polyimide films, slot insulation materials and the like (model coils), and is suitable for corona-resistant insulation of motors with the voltage of 800V and above. The composite insulating material for the motor is specifically arranged on the slot insulation and the slot cover insulation of the corona-resistant structure of the motor.
The embodiment of the disclosure also provides a motor, which comprises the corona-resistant motor insulation structure, and is particularly suitable for a type II motor insulation structure.
The embodiment of the disclosure also provides an electronic device comprising the motor of the embodiment of the disclosure. The electronic device of the embodiment of the present disclosure includes electronic devices generally in the art, such as electric motorcycles, electric automobiles, electric toys, and the like.
The beneficial effects of the present disclosure are further illustrated below in conjunction with the examples.
In the following examples, the methods or criteria for performance detection are as follows:
1. heat resistant temperature: GB/T11026;
2. corona resistance: GB/T21707;
3. tensile strength: GB/T5591.2;
4. electrical strength: GB/T1408.1;
5. partial discharge initiation voltage, discharge amount: GB/T7354;
in the following examples and experimental examples, the meta-aramid paper was given the brand
464LAM (thickness 0.04mm, 0.05mm respectively), respectively->
416LAM (thickness 0.08mm, 0.13mm, respectively).
Examples
S1, uniformly coating an adhesive on the upper surface and the lower surface of a first film, preparing a first meta-position aramid paper layer and a mica paper layer on the upper surface and the lower surface of the first film, and curing at a high temperature to obtain a three-layer composite structure of the first meta-position aramid paper layer-the first film-the mica paper layer;
s2, uniformly coating an adhesive on the surface of the mica paper, preparing a second film on the mica paper, and curing at a high temperature;
s3, uniformly coating the adhesive on the surface of the second film, preparing a second meta-position aramid paper layer on the second film, and curing at high temperature to obtain the composite insulating material. Specific examples are shown in table 1:
table 1: unit (mm)
After the above materials were prepared, performance was detected according to the experimental method in the examples of the present disclosure, and experimental results are shown in table 2:
TABLE 2
Experimental example 1
The experimental example is used for illustrating the technical effects of the structural design of the embodiment of the disclosure:
the following composite insulation materials were prepared by the method of the reference examples, and the specific examples obtained are shown in tables 3 and 4:
table 3: unit (mm)
| Material | Aramid paper | Mica paper | PI film | Adhesive layer (every layer) | Total thickness of |
| Material D1-1 | 0.05 | 0.04 | 0.05 | 0.01 | 0.16 |
| Material D1-2 | 0.08 | 0.04 | 0.05 | 0.01 | 0.19 |
| Materials D1-3 | 0.13 | 0.04 | 0.05 | 0.01 | 0.24 |
| Materials D1-4 | 0.04 | 0.04 | 0.05 | 0.01 | 0.15 |
Table 4: unit (mm)
| Material | Aramid paper | Mica paper | Aramid paper | Adhesive layer (every layer) | Total thickness of |
| Material D2-1 | 0.08 | 0.04 | 0.08 | 0.01 | 0.22 |
| Material D2-2 | 0.05 | 0.04 | 0.13 | 0.01 | 0.24 |
Table 5: unit (mm)
Table 6: unit (mm)
After the above comparative materials were prepared, performance was detected according to the experimental method in the examples of the present disclosure, and experimental results are shown in table 5:
TABLE 7
From the comparison, the mechanical property, the electrical strength and the corona resistance of the composite insulating material without adopting the structure of the embodiment of the disclosure are obviously reduced.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The motor insulation structure comprises a composite insulation material and is characterized by comprising a first meta-position aramid paper layer, a first film, a mica paper layer, a second film and a second meta-position aramid paper layer which are sequentially arranged from top to bottom;
a first adhesive layer is arranged between the first meta-aramid paper layer and the first film; a second adhesive layer is arranged between the first film and the mica paper layer; a third adhesive layer is arranged between the mica paper layer and the second film; a fourth adhesive layer is arranged between the second film and the second meta-position aramid paper layer; the adhesive layer is used for fixedly bonding two adjacent layers.
2. The motor insulation structure according to claim 1, wherein the first film is selected from polyimide films; the second film is selected from polyimide films.
3. The motor insulation structure according to claim 2, wherein the polyimide film has a thickness of 0.025mm to 0.125mm.
4. The motor insulation structure according to claim 1, wherein the thickness of the first meta-aramid paper layer is 0.04mm to 0.13mm, and the thickness of the second meta-aramid paper layer is 0.04mm to 0.13mm.
5. The motor insulation structure according to claim 1, wherein the thickness of the mica paper layer is 0.03mm to 0.05mm.
6. The motor insulation structure according to claim 1, wherein the thickness of the composite insulation material is 0.15mm to 0.35mm.
7. An electric machine comprising the electric machine insulation structure of any one of claims 1 to 6.
8. An electronic device comprising the motor of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220766713.9U CN218957408U (en) | 2022-03-31 | 2022-03-31 | Motor insulation structure, motor and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220766713.9U CN218957408U (en) | 2022-03-31 | 2022-03-31 | Motor insulation structure, motor and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218957408U true CN218957408U (en) | 2023-05-02 |
Family
ID=86138541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220766713.9U Active CN218957408U (en) | 2022-03-31 | 2022-03-31 | Motor insulation structure, motor and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218957408U (en) |
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2022
- 2022-03-31 CN CN202220766713.9U patent/CN218957408U/en active Active
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