CN110601410A - Semi-insulating flat wire and winding set for motor - Google Patents
Semi-insulating flat wire and winding set for motor Download PDFInfo
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- CN110601410A CN110601410A CN201910938674.9A CN201910938674A CN110601410A CN 110601410 A CN110601410 A CN 110601410A CN 201910938674 A CN201910938674 A CN 201910938674A CN 110601410 A CN110601410 A CN 110601410A
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- 238000004804 winding Methods 0.000 title claims abstract description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229920001721 polyimide Polymers 0.000 claims abstract description 70
- 229910052802 copper Inorganic materials 0.000 claims abstract 6
- 239000010949 copper Substances 0.000 claims abstract 6
- 238000005452 bending Methods 0.000 claims description 9
- 239000004642 Polyimide Substances 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000009776 industrial production Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 102100037651 AP-2 complex subunit sigma Human genes 0.000 claims 2
- 101000806914 Homo sapiens AP-2 complex subunit sigma Proteins 0.000 claims 2
- 238000009413 insulation Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/44—Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
技术领域technical field
本发明涉及电机用绕线组的技术领域,特别涉及一种电机用半绝缘扁线和绕线组。The invention relates to the technical field of winding groups for motors, in particular to a semi-insulated flat wire and winding groups for motors.
背景技术Background technique
目前,大型电机的绕组线通常都是扁线,为了避免在缠绕过程中不同扁线之间相互接触发生短路,需要对扁线进行绝缘处理。现有的绝缘处理主要是在扁线的表面绕上相应的绝缘材料,其中,最常用的绝缘处理就是采用云母带对扁线进行绕包处理,而云母带形成的绝缘层厚度能达到0.36mm,因此利用云母带进行绕包处理的扁线通常具有较大的横截面直径,这就导致相应形成的绕组也具有较大的体积。为了减小经绝缘处理后的扁线的横截面直径,可采用聚酰亚胺薄膜作为绝缘材料,这样形成的绝缘层厚度仅有0.15mm,但是聚酰亚胺薄膜的价格较高,这样会使得扁线的制作成本上升。可见,现有技术急需一种绝缘性能好、绝缘层厚度小以及绝缘处理成本低的电机用扁线。At present, the winding wires of large motors are usually flat wires. In order to avoid short circuit between different flat wires during the winding process, the flat wires need to be insulated. The existing insulation treatment is mainly to wrap the corresponding insulating material on the surface of the flat wire. Among them, the most commonly used insulation treatment is to wrap the flat wire with mica tape, and the thickness of the insulating layer formed by the mica tape can reach 0.36mm. , so flat wires wrapped with mica tape generally have a larger cross-sectional diameter, which leads to a correspondingly larger volume of the winding. In order to reduce the cross-sectional diameter of the flat wire after insulation treatment, polyimide film can be used as the insulating material, and the thickness of the insulating layer formed in this way is only 0.15mm, but the price of polyimide film is relatively high, which will This increases the production cost of the flat wire. It can be seen that there is an urgent need for a flat wire for motors with good insulation performance, small insulation layer thickness and low insulation treatment cost in the prior art.
发明内容Contents of the invention
针对现有技术存在的缺陷,本发明提供一种电机用半绝缘扁线,该电机用半绝缘扁线包括裸铜线和聚酰亚胺薄膜;其中,该裸铜线具有包括相对的第一侧面与第二侧面,以及相对的第三侧面与第四侧面;该聚酰亚胺薄膜设置于该第一侧面、该第二侧面和所述第三侧面上;该裸铜线的该第四侧面的表面呈暴露状态,并且在绕线组缠绕制作过程中只需要将扁线中裸铜线的外露表面与另外扁线中覆盖有聚酰亚胺薄膜的表面相接触,这样能够避免该裸铜线的外露表面发生短路现象,同时还能够有效地减少聚酰亚胺薄膜的使用量和扁线的横截面尺寸,从而相应地降低对扁线进行绝缘处理的成本和提高扁线的绝缘性能。Aiming at the defects in the prior art, the present invention provides a semi-insulated flat wire for a motor, which includes a bare copper wire and a polyimide film; wherein, the bare copper wire has an opposite first The side and the second side, and the opposite third side and the fourth side; the polyimide film is arranged on the first side, the second side and the third side; the fourth side of the bare copper wire The surface of the side is exposed, and only the exposed surface of the bare copper wire in the flat wire needs to be in contact with the surface covered with polyimide film in the other flat wire during the winding process of the winding group, so that the bare copper wire can be avoided. A short circuit occurs on the exposed surface of the copper wire, and at the same time, it can effectively reduce the amount of polyimide film used and the cross-sectional size of the flat wire, thereby correspondingly reducing the cost of insulating the flat wire and improving the insulation performance of the flat wire .
本发明提供一种电机用半绝缘扁线,其特征在于:The invention provides a semi-insulated flat wire for a motor, which is characterized in that:
所述电机用半绝缘扁线包括裸铜线和聚酰亚胺薄膜;其中,The semi-insulated flat wire for the motor includes bare copper wire and polyimide film; wherein,
所述裸铜线具有包括相对的第一侧面与第二侧面,以及相对的第三侧面与第四侧面;The bare copper wire has opposite first side and second side, and opposite third side and fourth side;
所述聚酰亚胺薄膜设置于所述第一侧面、所述第二侧面和所述第三侧面上;The polyimide film is disposed on the first side, the second side and the third side;
所述裸铜线的所述第四侧面的表面呈暴露状态;The surface of the fourth side of the bare copper wire is exposed;
进一步,所述第一侧面和所述第二侧面,以及所述第三侧面和所述第四侧面分别沿着所述裸铜线的长度方向相对设置;其中,Further, the first side and the second side, as well as the third side and the fourth side are arranged opposite to each other along the length direction of the bare copper wire; wherein,
所述第一侧面、所述第三侧面、所述第二侧面和所述第四侧面依次相接,并且所述第一侧面与所述第三侧面之间的相接角、所述第三侧面与所述第二侧面之间的相接角、所述第二侧面与所述第四侧面之间的相接角、所述第四侧面与所述第一侧面之间的相接角均为弧形角;The first side, the third side, the second side and the fourth side are sequentially connected, and the angle of contact between the first side and the third side, the third side The angle of contact between the side and the second side, the angle of contact between the second side and the fourth side, and the angle of contact between the fourth side and the first side are all is the arc angle;
进一步,所述裸铜线的横截面包括分别与所述第一侧面、所述第三侧面、所述第二侧面和所述第四侧面相对应的第一侧边、第三侧边、第二侧边和第四侧边;其中,Further, the cross section of the bare copper wire includes a first side, a third side, a third side and a first side corresponding to the first side, the third side, the second side and the fourth side respectively The second side and the fourth side; where,
所述第一侧边的长度与所述第二侧边的长度相同;The length of the first side is the same as the length of the second side;
所述第三侧边的长度与所述第四侧边的长度相同;The length of the third side is the same as the length of the fourth side;
或者,or,
所述电机用半绝缘扁线于所述聚酰亚胺薄膜的所有表面和所述裸铜线的暴露表面设置有防水薄膜;The semi-insulated flat wire for the motor is provided with a waterproof film on all surfaces of the polyimide film and the exposed surface of the bare copper wire;
进一步,所述第一侧边的长度和所述第二侧边的长度均为5mm-25mm;Further, the length of the first side and the length of the second side are both 5mm-25mm;
或者,or,
所述第三侧边的长度和所述第四侧边的长度均为2.5mm-20mm;Both the length of the third side and the length of the fourth side are 2.5mm-20mm;
或者,or,
所述第一侧边与所述第三侧边之间、所述第三侧边与所述第二侧边之间、所述第二侧边与所述第四侧边之间、所述第四侧边之间与所述第一侧边之间均通过90度的圆弧连接;Between the first side and the third side, between the third side and the second side, between the second side and the fourth side, the Both the fourth side and the first side are connected by a 90-degree arc;
进一步,所述聚酰亚胺薄膜粘结设置于所述第一侧面、所述第二侧面和所述第三侧面的表面上;Further, the polyimide film is adhesively arranged on the surfaces of the first side, the second side and the third side;
所述聚酰亚胺还粘结设置于所述第三侧面与所述第一侧面之间的相接角表面上和所述第四侧面与所述第一侧面之间的相接角的表面上;The polyimide is also bonded on the surface of the meeting angle between the third side and the first side and the surface of the meeting angle between the fourth side and the first side superior;
进一步,所述聚酰亚胺薄膜通过蒸镀的方式粘结设置于所述第一侧面、所述第二侧面和所述第三侧面的表面上;Further, the polyimide film is bonded and arranged on the surfaces of the first side, the second side and the third side by evaporation;
或者,or,
所述聚酰亚胺薄膜通过绝缘粘合剂粘结设置于所述第一侧面、所述第二侧面和所述第三侧面的表面上;The polyimide film is bonded on the surfaces of the first side, the second side and the third side by an insulating adhesive;
进一步,所述聚酰亚胺薄膜的厚度为0.0375mm-0.05mm;Further, the thickness of the polyimide film is 0.0375mm-0.05mm;
进一步,所述第一侧面和所述第二侧面在所述裸铜线的横截面上均具有第一宽度尺寸T1;Further, both the first side and the second side have a first width dimension T1 on the cross section of the bare copper wire;
所述第三侧面和所述第四侧面在所述裸铜线的横截面上均具有第二宽度尺寸T2;Both the third side and the fourth side have a second width dimension T2 on the cross-section of the bare copper wire;
所述第一宽度尺寸T1和所述第二宽度尺寸T2之间满足下面条件式(1)The following conditional formula (1) is satisfied between the first width dimension T1 and the second width dimension T2
(1+α)*T2≤T1≤(1+β)*T2 (1)(1+α)*T2≤T1≤(1+β)*T2 (1)
在上述条件式(1)中,α为所述裸铜线在所述横截面上对应的最小拉伸应力系数,β为所述裸铜线在所述横截面上对应的最大拉伸应力系数;In the above conditional formula (1), α is the minimum tensile stress coefficient corresponding to the bare copper wire on the cross section, and β is the maximum tensile stress coefficient corresponding to the bare copper wire on the cross section ;
进一步,所述第一侧面和所述第二侧面在所述裸铜线的横截面上均具有第一宽度尺寸T1;Further, both the first side and the second side have a first width dimension T1 on the cross section of the bare copper wire;
所述第三侧面和所述第四侧面在所述裸铜线的横截面上均具有第二宽度尺寸T2;Both the third side and the fourth side have a second width dimension T2 on the cross-section of the bare copper wire;
所述第一宽度尺寸T1和所述第二宽度尺寸T2之间满足下面条件式(2)The following conditional formula (2) is satisfied between the first width dimension T1 and the second width dimension T2
在上述条件式(2)中,Vmax为所述裸铜线的击穿电压,Vthreshold为所述裸铜线的极限加载阈值电压,Sallow为所述裸铜线的工业制作容许截面面积;In above-mentioned conditional formula (2), Vmax is the breakdown voltage of described bare copper wire, and Vthreshold is the ultimate loading threshold voltage of described bare copper wire, and Sallow is the industrial production allowable cross-sectional area of described bare copper wire ;
进一步,所述第四侧面的表面总面积S1与所述第四侧面处于所述暴露状态的区域表面积S2之间满足下面条件式(3)Further, the following conditional formula (3) is satisfied between the total surface area S1 of the fourth side and the area surface area S2 of the exposed state of the fourth side
μ1*S1≤S2≤μ2*S1 (3)μ1*S1≤S2≤μ2*S1 (3)
在上述条件式(3)中,μ1为所述裸铜线在其横截面上的最小弯曲应力系数,μ2为所述裸铜线在其横截面上的最大弯曲应力系数,并且μ1和μ2均与所述裸铜线在其横截面上的材料密度分布状态相关;In the above conditional formula (3), μ1 is the minimum bending stress coefficient of the bare copper wire on its cross section, μ2 is the maximum bending stress coefficient of the bare copper wire on its cross section, and both μ1 and μ2 are It is related to the material density distribution state of the bare copper wire on its cross section;
进一步,所述聚酰亚胺薄膜于所述第一侧面和所述第二侧面的表面上均具有第一平均厚度Dave 1;Further, the polyimide film has a first average thickness D ave 1 on the surfaces of the first side and the second side;
所述聚酰亚胺薄膜于所述第三侧面的表面上均具有第二平均厚度Dave 2;The polyimide film has a second average thickness D ave 2 on the surface of the third side;
所述第一平均厚度Dave 1和所述第二平均厚度Dave 2之间满足下面公式(4)The following formula (4) is satisfied between the first average thickness D ave 1 and the second average thickness D ave 2
在上述条件式(4)中,γ1为所述裸铜线的所述第一侧面和所述第二侧面邻近区域对应的电流密度相关系数,γ2为裸铜线的所述第三侧面邻近区域对应的电流密度相关系数;In the above conditional formula (4), γ1 is the current density correlation coefficient corresponding to the adjacent area of the first side and the second side of the bare copper wire, and γ2 is the adjacent area of the third side of the bare copper wire Corresponding current density correlation coefficient;
进一步,所述聚酰亚胺薄膜于所述第一侧面和所述第二侧面的表面上均具有第一厚度起伏系数σ1;Further, the polyimide film has a first thickness fluctuation coefficient σ1 on the surfaces of the first side and the second side;
所述聚酰亚胺薄膜于所述第三侧面的表面上具有第二厚度起伏系数σ2;The polyimide film has a second thickness fluctuation coefficient σ2 on the surface of the third side;
所述第一厚度起伏系数σ1和所述第二厚度起伏系数σ2之间满足下面公式(5)The first thickness fluctuation coefficient σ1 and the second thickness fluctuation coefficient σ2 satisfy the following formula (5)
σ1≥σ2 (5);σ1≥σ2 (5);
进一步,所述电机用半绝缘扁线的击穿电压大于或者等于4kV;Further, the breakdown voltage of the semi-insulated flat wire for the motor is greater than or equal to 4kV;
或者,or,
所述电机用半绝缘扁线的具有大于或者等于32%的拉伸延展性;The semi-insulated flat wire for motors has a tensile elongation greater than or equal to 32%;
进一步,所述聚酰亚胺薄膜具有叠包结构;其中,Further, the polyimide film has a wrapping structure; wherein,
所述叠包结构包括若干相互层叠的聚酰亚胺子薄膜,并且相邻层叠的两个所述聚酰亚胺薄膜之间不存在空气间隙。The wrapping structure includes several polyimide sub-films stacked on each other, and there is no air gap between two adjacently stacked polyimide films.
本发明还提供一种绕线组,其特征在于:The present invention also provides a winding group, which is characterized in that:
所述绕线组包括若干上述任一项所述的电机用半绝缘扁线;The winding group includes several semi-insulated flat wires for motors described in any one of the above;
在任意所述绕线组相邻的两个半绝缘扁线中,其中一个半绝缘扁线的呈暴露状态的裸铜线的所述第四侧面、与另一个半绝缘扁线的表面设置有聚酰亚胺薄膜的所述第三侧面相接触。Among the two semi-insulated flat wires adjacent to any of the winding groups, the fourth side of the exposed bare copper wire of one of the semi-insulated flat wires and the surface of the other semi-insulated flat wire are provided with The third sides of the polyimide film are in contact.
相比于现有技术,该电机用半绝缘扁线包括裸铜线和聚酰亚胺薄膜;其中,该裸铜线具有包括相对的第一侧面与第二侧面,以及相对的第三侧面与第四侧面;该聚酰亚胺薄膜设置于该第一侧面、该第二侧面和所述第三侧面上;该裸铜线的该第四侧面的表面呈暴露状态,并且在绕线组缠绕制作过程中只需要将扁线中裸铜线的外露表面与另外扁线中覆盖有聚酰亚胺薄膜的表面相接触,这样能够避免该裸铜线的外露表面发生短路现象,同时还能够有效地减少聚酰亚胺薄膜的使用量和扁线的横截面尺寸,从而相应地降低对扁线进行绝缘处理的成本和提高扁线的绝缘性能。Compared with the prior art, the semi-insulated flat wire for a motor includes a bare copper wire and a polyimide film; wherein, the bare copper wire has a first side opposite to a second side, and a third side opposite to the The fourth side; the polyimide film is arranged on the first side, the second side and the third side; the surface of the fourth side of the bare copper wire is exposed, and is wound on the winding group During the production process, it is only necessary to contact the exposed surface of the bare copper wire in the flat wire with the surface covered with polyimide film in another flat wire, which can avoid short-circuiting on the exposed surface of the bare copper wire and effectively The amount of polyimide film used and the cross-sectional size of the flat wire can be greatly reduced, thereby correspondingly reducing the cost of insulating the flat wire and improving the insulation performance of the flat wire.
本发明的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本发明而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
下面通过附图和实施例,对本发明的技术方案做进一步的详细描述。The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为本发明提供的一种电机用半绝缘扁线的结构示意图。Fig. 1 is a schematic structural diagram of a semi-insulated flat wire for a motor provided by the present invention.
图2为本发明提供的一种绕线组的结构示意图。Fig. 2 is a schematic structural diagram of a winding group provided by the present invention.
附图中的数字标记分别是:1:裸铜线、2:聚酰亚胺薄膜。The numbers in the drawings are respectively: 1: bare copper wire, 2: polyimide film.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
参阅图1,为本发明实施例提供的一种电机用半绝缘扁线的结构示意图。该电机用半绝缘扁线包括裸铜线和聚酰亚胺薄膜;其中Referring to FIG. 1 , it is a schematic structural diagram of a semi-insulated flat wire for a motor provided by an embodiment of the present invention. The semi-insulated flat wire for motor includes bare copper wire and polyimide film;
该裸铜线具有包括相对的第一侧面与第二侧面,以及相对的第三侧面与第四侧面;The bare copper wire has opposite first side and second side, and opposite third side and fourth side;
该聚酰亚胺薄膜设置于该第一侧面、该第二侧面和该第三侧面上;The polyimide film is disposed on the first side, the second side and the third side;
该裸铜线的该第四侧面的表面呈暴露状态。The surface of the fourth side of the bare copper wire is exposed.
优选地,该第一侧面和该第二侧面,以及该第三侧面和该第四侧面分别沿着该裸铜线的长度方向相对设置;其中,该第一侧面、该第三侧面、该第二侧面和该第四侧面依次相接,并且该第一侧面与该第三侧面之间的相接角、该第三侧面与该第二侧面之间的相接角、该第二侧面与该第四侧面之间的相接角、该第四侧面与该第一侧面之间的相接角均为弧形角,该弧形角的设置能够使得该聚酰亚胺薄膜能够与相应的第一侧面、第二侧面和第三侧面紧密接触,以及避免不同侧面接合的连接角对该聚酰亚胺薄膜造成划伤;Preferably, the first side and the second side, as well as the third side and the fourth side are arranged opposite to each other along the length direction of the bare copper wire; wherein, the first side, the third side, the second side The two sides and the fourth side meet in turn, and the angle of contact between the first side and the third side, the angle of contact between the third side and the second side, the angle of contact between the second side and the The contact angle between the fourth side and the contact angle between the fourth side and the first side are all arc angles, and the setting of the arc angle can make the polyimide film can be connected with the corresponding first side One side, the second side and the third side are in close contact, and the joint angles that avoid different side joints cause scratches to the polyimide film;
优选地,该裸铜线的横截面包括分别与该第一侧面、该第三侧面、该第二侧面和该第四侧面相对应的第一侧边、第三侧边、第二侧边和第四侧边;其中,该第一侧边的长度与该第二侧边的长度相同;该第三侧边的长度与该第四侧边的长度相同;Preferably, the cross section of the bare copper wire includes a first side, a third side, a second side and a side corresponding to the first side, the third side, the second side and the fourth side respectively. The fourth side; wherein, the length of the first side is the same as the length of the second side; the length of the third side is the same as the length of the fourth side;
优选地,该电机用半绝缘扁线于该聚酰亚胺薄膜的所有表面和该裸铜线的暴露表面设置有防水薄膜;Preferably, the semi-insulated flat wire for the motor is provided with a waterproof film on all surfaces of the polyimide film and the exposed surface of the bare copper wire;
优选地,该第一侧边的长度和该第二侧边的长度均为5mm-25mm;Preferably, the length of the first side and the length of the second side are both 5mm-25mm;
优选地,该第三侧边的长度和该第四侧边的长度均为2.5mm-20mm;Preferably, the length of the third side and the length of the fourth side are both 2.5mm-20mm;
优选地,该第一侧边与该第三侧边之间、该第三侧边与该第二侧边之间、该第二侧边与该第四侧边之间、该第四侧边之间与该第一侧边之间均通过90度的圆弧连接;Preferably, between the first side and the third side, between the third side and the second side, between the second side and the fourth side, the fourth side are connected with the first side by a 90-degree arc;
优选地,该聚酰亚胺薄膜粘结设置于该第一侧面、该第二侧面和该第三侧面的表面上;Preferably, the polyimide film is adhesively disposed on the surfaces of the first side, the second side and the third side;
该聚酰亚胺还粘结设置于该第三侧面与该第一侧面之间的相接角表面上和该第四侧面与该第一侧面之间的相接角的表面上;The polyimide is also bonded on the surface of the meeting angle between the third side and the first side and on the surface of the meeting angle between the fourth side and the first side;
优选地,该聚酰亚胺薄膜通过蒸镀的方式粘结设置于该第一侧面、该第二侧面和该第三侧面的表面上;Preferably, the polyimide film is bonded on the surfaces of the first side, the second side and the third side by evaporation;
优选地,该聚酰亚胺薄膜通过绝缘粘合剂粘结设置于该第一侧面、该第二侧面和该第三侧面的表面上;Preferably, the polyimide film is bonded on the surfaces of the first side, the second side and the third side by an insulating adhesive;
优选地,该聚酰亚胺薄膜的厚度为0.0375mm-0.05mm;Preferably, the thickness of the polyimide film is 0.0375mm-0.05mm;
优选地,该第一侧面和该第二侧面在该裸铜线的横截面上均具有第一宽度尺寸T1;Preferably, the first side and the second side both have a first width dimension T1 on the cross-section of the bare copper wire;
该第三侧面和该第四侧面在该裸铜线的横截面上均具有第二宽度尺寸T2;Both the third side and the fourth side have a second width dimension T2 on the cross-section of the bare copper wire;
该第一宽度尺寸T1和该第二宽度尺寸T2之间满足下面条件式(1)The following conditional formula (1) is satisfied between the first width dimension T1 and the second width dimension T2
(1+α)*T2≤T1≤(1+β)*T2 (1)(1+α)*T2≤T1≤(1+β)*T2 (1)
在上述条件式(1)中,α为该裸铜线在该横截面上对应的最小拉伸应力系数,β为该裸铜线在该横截面上对应的最大拉伸应力系数,由于该电机用半绝缘扁线在使用过程中可能会被反复拉伸缠绕,通过上述条件式(1)制成的裸铜线能够保证该裸铜线能够反复拉伸过程中依然能够保持良好的拉伸恢复性能,以及最大限度地提高裸铜线的拉伸形变量,从而改善该电机用半绝缘扁线的机械拉伸特性;In the above conditional formula (1), α is the minimum tensile stress coefficient corresponding to the bare copper wire on the cross section, and β is the maximum tensile stress coefficient corresponding to the bare copper wire on the cross section. The semi-insulated flat wire may be repeatedly stretched and wound during use, and the bare copper wire made by the above conditional formula (1) can ensure that the bare copper wire can maintain good stretch recovery during repeated stretching performance, as well as maximizing the tensile deformation of the bare copper wire, thereby improving the mechanical tensile properties of the semi-insulated flat wire for electric motors;
优选地,该第一侧面和该第二侧面在该裸铜线的横截面上均具有第一宽度尺寸T1;Preferably, the first side and the second side both have a first width dimension T1 on the cross-section of the bare copper wire;
该第三侧面和该第四侧面在该裸铜线的横截面上均具有第二宽度尺寸T2;Both the third side and the fourth side have a second width dimension T2 on the cross-section of the bare copper wire;
该第一宽度尺寸T1和该第二宽度尺寸T2之间满足下面条件式(2)The following conditional formula (2) is satisfied between the first width dimension T1 and the second width dimension T2
在上述条件式(2)中,Vmax为该裸铜线的击穿电压,Vthreshold为该裸铜线的极限加载阈值电压,Sallow为该裸铜线的工业制作容许截面面积,由于该电机用半绝缘扁线在工作过程中需要接入相应的交流电源中,并且该交流电源会产生相应的电压起伏,这可能导致该裸铜线被起伏的电压击穿,而根据上述条件式(2)制成的裸铜线则具有良好的抗电压击穿特性;In above-mentioned conditional formula (2), V max is the breakdown voltage of this bare copper wire, and V threshold is the ultimate loading threshold voltage of this bare copper wire, and Sallow is the industrial production allowable cross-sectional area of this bare copper wire, because the The semi-insulated flat wire for the motor needs to be connected to the corresponding AC power supply during the working process, and the AC power supply will generate corresponding voltage fluctuations, which may cause the bare copper wire to be broken down by the fluctuation voltage, and according to the above conditional formula ( 2) The bare copper wire made has good resistance to voltage breakdown;
优选地,该第四侧面的表面总面积S1与该第四侧面处于该暴露状态的区域表面积S2之间满足下面条件式(3)Preferably, the following conditional formula (3) is satisfied between the total surface area S1 of the fourth side and the surface area S2 of the exposed region of the fourth side
μ1*S1≤S2≤μ2*S1 (3)μ1*S1≤S2≤μ2*S1 (3)
在上述条件式(3)中,μ1为该裸铜线在其横截面上的最小弯曲应力系数,μ2为该裸铜线在其横截面上的最大弯曲应力系数,并且μ1和μ2均与该裸铜线在其横截面上的材料密度分布状态相关,由于该电机用半绝缘扁线在使用过程中可能会被反复弯折缠绕,通过上述条件式(3)制成的裸铜线能够保证该裸铜线能够反复弯折过程中依然能够保持良好的弹性恢复性能,以及最大限度地提高裸铜线的弯折形变量,从而改善该电机用半绝缘扁线的机械弯折特性;In the above conditional formula (3), μ1 is the minimum bending stress coefficient of the bare copper wire on its cross section, μ2 is the maximum bending stress coefficient of the bare copper wire on its cross section, and both μ1 and μ2 are related to the The distribution state of the material density of the bare copper wire on its cross section is related. Since the semi-insulated flat wire for motors may be repeatedly bent and wound during use, the bare copper wire made by the above conditional formula (3) can ensure The bare copper wire can maintain good elastic recovery performance during repeated bending, and maximize the bending deformation of the bare copper wire, thereby improving the mechanical bending characteristics of the semi-insulated flat wire for motors;
优选地,该聚酰亚胺薄膜于该第一侧面和该第二侧面的表面上均具有第一平均厚度Dave 1;Preferably, the polyimide film has a first average thickness D ave 1 on the surfaces of the first side and the second side;
该聚酰亚胺薄膜于该第三侧面的表面上均具有第二平均厚度Dave 2;The polyimide film has a second average thickness D ave 2 on the surface of the third side;
该第一平均厚度Dave 1和该第二平均厚度Dave 2之间满足下面公式(4)The following formula (4) is satisfied between the first average thickness D ave 1 and the second average thickness D ave 2
在上述条件式(4)中,γ1为该裸铜线的该第一侧面和该第二侧面邻近区域对应的电流密度相关系数,γ2为裸铜线的该第三侧面邻近区域对应的电流密度相关系数,由于该裸铜线的横截面为扁平的矩形形状,这使得电流在该裸铜线内部传输过程中不同区域处的电流密度是不相同的,根据上述条件式(4)设置的聚酰亚胺薄膜能够保证对该裸铜线的该第一侧面、该第二侧面和该第三侧面均具有均匀的绝缘保护特性,从而进一步改善裸铜线的电流传输特性;In the above conditional formula (4), γ1 is the current density correlation coefficient corresponding to the adjacent area of the first side and the second side of the bare copper wire, and γ2 is the current density corresponding to the adjacent area of the third side of the bare copper wire Correlation coefficient, because the cross-section of the bare copper wire is a flat rectangular shape, which makes the current density at different regions in the internal transmission process of the bare copper wire different, according to the above conditional formula (4) set the poly The imide film can ensure that the first side, the second side and the third side of the bare copper wire have uniform insulation and protection characteristics, thereby further improving the current transmission characteristics of the bare copper wire;
优选地,该聚酰亚胺薄膜于该第一侧面和该第二侧面的表面上均具有第一厚度起伏系数σ1;Preferably, the polyimide film has a first thickness fluctuation coefficient σ1 on the surfaces of the first side and the second side;
该聚酰亚胺薄膜于该第三侧面的表面上具有第二厚度起伏系数σ2;The polyimide film has a second thickness fluctuation coefficient σ2 on the surface of the third side;
该第一厚度起伏系数σ1和该第二厚度起伏系数σ2之间满足下面公式(5)The first thickness fluctuation coefficient σ1 and the second thickness fluctuation coefficient σ2 satisfy the following formula (5)
σ1≥σ2 (5)σ1≥σ2 (5)
根据上述条件式(5)制成的聚酰亚胺薄膜能够保证其表面具有足够摩擦力,从而保证电机用半绝缘扁线在缠绕过程中的缠绕稳固性和避免发生缠绕松脱的情况;The polyimide film made according to above-mentioned conditional formula (5) can guarantee that its surface has sufficient frictional force, thus guarantees the winding stability of semi-insulated flat wire for motor in winding process and avoids the situation that winding comes loose;
优选地,该电机用半绝缘扁线的击穿电压大于或者等于4kV;Preferably, the breakdown voltage of the semi-insulated flat wire for the motor is greater than or equal to 4kV;
优选地,该电机用半绝缘扁线的具有大于或者等于32%的拉伸延展性;Preferably, the semi-insulated flat wire for motors has a tensile elongation greater than or equal to 32%;
优选地,该聚酰亚胺薄膜具有叠包结构;其中,Preferably, the polyimide film has a wrapping structure; wherein,
该叠包结构包括若干相互层叠的聚酰亚胺子薄膜,并且相邻层叠的两个该聚酰亚胺薄膜之间不存在空气间隙。The wrapping structure includes several polyimide sub-films stacked on each other, and there is no air gap between two adjacently stacked polyimide films.
参阅图2,为本发明实施例提供的一种绕线组的结构示意图。该绕线组包括若干电机用半绝缘扁线,在任意该绕线组相邻的两个半绝缘扁线中,其中一个半绝缘扁线的呈暴露状态的裸铜线的该第四侧面、与另一个半绝缘扁线的表面设置有聚酰亚胺薄膜的该第三侧面相接触。Referring to FIG. 2 , it is a schematic structural diagram of a winding group provided by an embodiment of the present invention. The winding group includes several semi-insulated flat wires for motors, and among any two semi-insulated flat wires adjacent to the winding group, the fourth side of the exposed copper wire of one of the semi-insulated flat wires, The third side is in contact with the surface of another semi-insulated flat wire provided with a polyimide film.
从上述实施例可以看出,该电机用半绝缘扁线包括裸铜线和聚酰亚胺薄膜;其中,该裸铜线具有包括相对的第一侧面与第二侧面,以及相对的第三侧面与第四侧面;该聚酰亚胺薄膜设置于该第一侧面、该第二侧面和所述第三侧面上;该裸铜线的该第四侧面的表面呈暴露状态,并且在绕线组缠绕制作过程中只需要将扁线中裸铜线的外露表面与另外扁线中覆盖有聚酰亚胺薄膜的表面相接触,这样能够避免该裸铜线的外露表面发生短路现象,同时还能够有效地减少聚酰亚胺薄膜的使用量和扁线的横截面尺寸,从而相应地降低对扁线进行绝缘处理的成本和提高扁线的绝缘性能。It can be seen from the above embodiments that the semi-insulated flat wire for motors includes a bare copper wire and a polyimide film; wherein, the bare copper wire has a first side and a second side opposite to each other, and a third side opposite and the fourth side; the polyimide film is arranged on the first side, the second side and the third side; the surface of the fourth side of the bare copper wire is exposed, and in the winding group During the winding process, only the exposed surface of the bare copper wire in the flat wire needs to be in contact with the surface covered with polyimide film in another flat wire, which can avoid short-circuiting on the exposed surface of the bare copper wire, and can also The usage amount of the polyimide film and the cross-sectional size of the flat wire are effectively reduced, thereby correspondingly reducing the cost of insulating the flat wire and improving the insulation performance of the flat wire.
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.
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