JP5404133B2 - Insulated wire and coil manufacturing method using the same - Google Patents

Description

  The present invention relates to an electrically insulated wire and a coil manufacturing method using the same.

  Conventionally, an insulated wire having an insulator layer on the surface is known as a conductive wire used for a winding of an electric motor coil or the like. For example, when the coil formed by winding the insulated wire is used in an electric motor, there is a problem that the insulated wires collide with each other due to mechanical vibration, electromagnetic vibration, or the like and the insulation is destroyed.

  In order to solve the problem, a coil is known in which a liquid resin (varnish) is impregnated between the wound insulated wires, and the liquid resin is heated and cured (see, for example, Patent Document 1). According to the coil, the liquid resin is cured in the gap between the insulated wires, and the insulated wires are fixed by the cured resin, so that the insulated wires are insulated by collision between the insulated wires. Will not be destroyed.

  For the fixing of the coil, for example, a liquid resin containing a main agent containing a reactive resin and a curing agent for curing the main agent is used. The liquid resin is usually stored in a tank, taken out as necessary, and impregnated between the insulated wires.

  However, the liquid resin partially increases in viscosity due to a reaction between the main agent and the curing agent due to a temperature difference between when stored in the tank and when used for impregnation. There is an inconvenience that it may be difficult to use for fixing the electric wire.

JP 2008-48555 A

  An object of this invention is to provide the insulated wire which can be fixed easily, and the coil manufacturing method using the same.

In order to solve the above-mentioned problems, the insulated wire of the present invention reacts with an insulating layer formed on the surface of a conducting wire and a main agent that is formed on the surface of the insulating layer and contains a reactive resin, thereby curing the main agent. A curing agent layer to be formed, and the curing agent layer is formed in an island shape on the surface of the insulator layer .

  The insulated wire of the present invention can form a coil by winding. When the coil is heated by impregnating the main agent containing a reactive resin in the gap between the insulated wires, the hardener contained in the hardener layer formed on the surface of the insulator layer is melted, and the main agent and react. As a result, the resin cured by the reaction between the main agent and the curing agent is filled in the gap between the insulated wires, and the insulated wires can be fixed.

  Since the insulated wire according to the present invention includes the curing agent layer, it is possible to use one that does not contain a curing agent as the main agent. Therefore, while the main agent is stored in the tank, the viscosity does not increase due to a partial reaction, and the insulated wire of the present invention can be easily fixed by the main agent.

In the insulated wire of the present invention, the curing agent layer may be provided so as to cover the entire surface of the insulator layer, but in this case, when the insulated wire is wound to form a coil, The hardener layer tends to become friction and the sliding between the insulated wires tends to be poor. Therefore, in the insulated wire of the present invention, the curing agent layer is formed in an island shape on the surface of the insulator layer . Thereby , the insulated wire of this invention can reduce the friction by this hardening | curing agent layer, and can form the said coil easily.

  Moreover, the insulated wire of this invention WHEREIN: It is further more preferable that the said hardening | curing agent layer equips the surface with a lubrication raw material layer. By providing the lubricating material layer, the insulated wire of the present invention can further reduce friction due to the hardener layer, and the coil can be formed more easily.

Insulated wire of the present invention includes the steps of forming a co-yl by turning up the insulating electric wire, the main agent containing a reactive resin which is cured by reaction with curing agents to form the curing agent layer is impregnated in said coil , And can be used in a coil manufacturing method comprising a step of reacting and curing the curing agent layer and the main agent.

  In the coil manufacturing method of the present invention, first, the coil is formed by winding the insulated wire of the present invention.

  Next, the coil is impregnated with a main agent containing a reactive resin that is cured by reacting with the curing agent that forms the curing agent layer. The main agent is a liquid resin composed only of a reactive resin and does not contain a curing agent. Therefore, the viscosity does not increase due to a partial reaction while being stored in the tank. Therefore, when the main agent is impregnated in the coil, it easily penetrates between the insulated wires and reacts with the curing agent layer to be cured. As a result, the coil is fixed by the cured resin.

  At this time, the coil impregnated with the main agent may be heated. If it does in this way, reaction of the hardening | curing agent contained in the said hardening | curing agent layer and the said main ingredient can be accelerated | stimulated.

Explanatory sectional drawing which shows the structure of the insulated wire of this embodiment. Process drawing which shows the 1st process of the coil manufacturing method using the insulated wire of this embodiment. Explanatory sectional drawing which shows the structure of the coil using the insulated wire of this embodiment. Process drawing which shows the 2nd process of the coil manufacturing method using the insulated wire of this embodiment. Process drawing which shows the 3rd process of the coil manufacturing method using the insulated wire of this embodiment. Process drawing which shows the 4th process of the coil manufacturing method using the insulated wire of this embodiment. Explanatory drawing which shows the method of measuring the three-point bending strength of a bundle wire.

  Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

  As shown in FIG. 1A, the insulated wire 1 of the present embodiment includes an insulator layer 3 formed on the surface of the conducting wire 2 and a curing agent layer 4 formed on the surface of the insulator layer 3. . The curing agent layer 4 is made of a curing agent that reacts with the main agent containing a reactive resin to cure the main agent.

  Examples of the conductive wire 2 include those made of copper, aluminum, silver, gold, and the like.

  Examples of the insulator forming the insulator layer 3 include a resin such as amide imide.

  Examples of the curing agent that forms the curing agent layer 4 include aliphatic amines, aromatic amines, modified amines, polyamide resins, tertiary and secondary amines, imidazoles, liquid polymer butanoic acid anhydride, and boron trifluoride. -Amine complex, dicyandiamide, organic acid hydrazide, diphenyliodonium hexafluorophosphate, triphenylsulfonium hexafluorophosphate and the like.

  Examples of the reactive resin contained in the main agent that reacts with the curing agent include an epoxy resin and an unsaturated polyester resin.

  In the insulated wire 1, first, the insulator is applied to the surface of the conductive wire 2 to form the insulator layer 3, and further, the curing agent is applied to the surface of the insulator layer 3 to form the curing agent layer 4. Can be obtained.

  Next, the coil manufacturing method using the insulated wire 1 shown to Fig.1 (a) is demonstrated with reference to FIG. 2 thru | or FIG.

  First, as shown in FIG. 2, the coil 7 is formed by winding the insulated wire 1 supplied from the magnet wire bobbin 6 around the winding frame 5. As shown in FIG. 3, the coil 7 is wound so as to align the insulated wires 1.

  Next, as shown in FIG. 4, the main agent 8 is impregnated in the coil 7. The main agent 8 contains a reactive resin that reacts and cures with the curing agent that forms the curing agent layer 4 and is supplied from a tank (not shown). The main agent 8 does not need to contain a curing agent because the insulated wire 1 includes the curing agent layer 4. Accordingly, since the main agent 8 does not cause a partial reaction with the curing agent while being stored in the tank, there is no risk of an increase in viscosity. When the coil 7 is impregnated, the gap between the insulated wires 1 is not increased. Easily penetrates into.

  Next, the coil 7 impregnated with the main agent 8 is heat-treated at a temperature in the range of 80 to 150 ° C. for 10 to 90 hours, so that the curing agent contained in the curing agent layer 4 becomes the main agent 8 and Reacts to form uncured resin 8a. As shown in FIG. 6, the uncured resin 8 a forms a cured resin 9 by the reaction, and the cured resin 9 is filled in the gap between the insulated wires 1 and fixes the insulated wires 1 to each other.

  In the insulated wire 1 shown in FIG. 1A of the present embodiment, the curing agent layer 4 is provided so as to cover the entire surface of the insulator layer 3, but the curing agent layer 4 is shown in FIG. As shown, it may be formed in an island shape on the surface of the insulator layer 3. In the insulated wire 1 shown in FIG. 1B, first, the insulator is applied to the surface of the conductive wire 2 to form the insulator layer 3, and further, a particulate curing agent is applied to the surface of the insulator layer 3. Then, it can be obtained by forming the island-shaped curing agent layer 4.

  The insulated wire 1 having such a configuration can easily form the coil 7 by reducing friction caused by the curing agent layer 4 when wound around the winding frame 5.

  Moreover, the insulated wire 1 may be provided with a lubricating material layer 10 on the surface of the curing agent layer 4 as shown in FIG. Examples of the lubricating material forming the lubricating material layer 10 include lubricating components such as lubricating oil, paraffins, and wax, or resins such as nylon and polyethylene. An insulated wire 1 shown in FIG. 1C is formed by applying the lubricant material on the surface of the insulated wire 1 shown in FIG. 1A or the insulated wire 1 shown in FIG. Can be obtained.

  According to this configuration, the insulated wire 1 includes the lubricating material layer 10 on the surface thereof, so that it is possible to reduce friction caused by the curing agent layer 4 when wound around the winding frame 5, and to easily form the coil 7. can do.

  Next, examples, comparative examples, and reference examples of the present invention are shown.

  In this example, an insulated wire 1 was obtained by forming a curing agent layer 4 on the surface of a commercially available wire having a diameter of 0.5 mm provided with an insulator layer 3 made of an amideimide resin on the surface of a conductive wire 2 made of copper. . The curing agent layer 4 was formed by applying a modified amine-based curing agent powder solid at room temperature on the insulator layer 3 together with an organic solvent so as to have a thickness of 1 μm or more.

  Next, in this example, instead of the coil, 300 insulated wires 1 having a total length of 100 mm were bundled together, and both ends were temporarily fixed to create a bundle of insulated wires 1. Next, the bundle was impregnated with a main agent 8 containing a liquid epoxy resin which is a thermosetting resin as a reactive resin.

  Next, the bundle wire was heat-treated at a temperature of 150 ° C. for 1 hour. By the heat treatment, the modified amine-based curing agent dissolved from the curing agent layer 4 reacts with the epoxy resin 8, and the cured epoxy resin 9 is filled in the gap between the insulated wires 1 and the insulated wires 1 are fixed together. did. As a result, a cylindrical bundle having an overall length of 100 mm and an outer diameter of 15 mm was obtained.

Next, as shown in FIG. 7, the bundled wire 13 having a length L obtained in this embodiment is placed on a pair of supports 11 and 12 arranged at a distance d, and the bundle is bundled. The three-point bending load when the load F was applied to the center of the wire 13 was measured, and the insulated wire fixing force was evaluated using the three-point bending load as an index. In the present embodiment, the distance d between the supports 11 and 12 is 50 mm, and the length L of the bundle 13 is 100 mm. As a result, the three-point bending load of the bundled wire 13 obtained in this example was 1010N. The results are shown in Table 1.
[Comparative example]
In this comparative example, the same commercially available wire as that used in the above example was used as an insulated wire, and 300 insulated wires having a total length of 100 mm were assembled, and the bundled wires of the insulated wires were created by temporarily fixing both ends. did. The insulated wire does not include the curing agent layer 4 at all.

Next, in this comparative example, the three-point bending load of the bundle wire was measured in exactly the same manner as in the above example except that the main wire 8 was not impregnated in the bundle wire. As a result, the three-point bending load of the bundled wire obtained in this comparative example was 147N. The results are shown in Table 1.
[Reference example]
In this reference example, the same commercially available electric wire as that used in the above example was used as an insulated wire, 300 insulated wires having a total length of 100 mm were collected, and the insulated wire bundle was prepared by temporarily fixing both ends. The insulated wire does not include the curing agent layer 4 at all.

  Next, in this reference example, the insulated wire was fixed by the cured epoxy resin 9 by impregnating the bundle wire with the main agent 8 containing a modified amine-based curing agent and heat-treating it at a temperature of 150 ° C. for 1 hour. Except for the above, the three-point bending load of the bundle was measured in exactly the same manner as in the above example. As a result, the three-point bending load of the bundled wire obtained in this reference example was 1040 Pa. The results are shown in Table 1.

表１から、前記実施例の束線１３によれば、絶縁電線が全く固定されていない前記比較例の束線に比較して、格段に優れた絶縁電線固定化力を備えていることが明らかである。
また、前記実施例の束線１３によれば、硬化剤を含む主剤８により絶縁電線が固定されている前記参考例の束線と同等の絶縁電線固定化力を備えていることが明らかである。

From Table 1, it is clear that according to the bundled wire 13 of the example, the insulated wire fixing force is remarkably superior to that of the comparative example in which the insulated wire is not fixed at all. It is.
Moreover, according to the bundled wire 13 of the said Example, it is clear that the insulated wire fixing force equivalent to the bundled wire of the said reference example with which the insulated wire is fixed with the main ingredient 8 containing a hardening | curing agent is provided. .

DESCRIPTION OF SYMBOLS 1 ... Insulated electric wire, 2 ... Conductive wire, 3 ... Insulator layer, 4 ... Hardener layer, 7 ... Coil, 8 ... Main agent, 10 ... Lubrication material layer.

Claims (5)

An insulator layer formed on the surface of the conductive wire, and a curing agent layer formed on the surface of the insulator layer and reacting with the main agent containing a reactive resin to cure the main agent ,
The insulated wire, wherein the curing agent layer is formed in an island shape on the surface of the insulator layer . The insulated wire according to claim 1, wherein the curing agent layer includes a lubricating material layer on a surface thereof . A coil by winding an insulated wire comprising an insulator layer formed on the surface of a conductive wire and a curing agent layer formed on the surface of the insulator layer and reacting with a main agent containing a reactive resin to cure the main agent Forming a step;
A step of impregnating the coil with a main agent containing a reactive resin that is cured by reacting with a curing agent that forms the curing agent layer, and reacting and curing the curing agent layer and the main agent.
The coil manufacturing method, wherein the curing agent layer is formed in an island shape on a surface of the insulator layer . The coil manufacturing method according to claim 3, wherein the coil impregnated with the main agent is heated to cause the hardener layer and the main agent to react with each other to be cured . The coil manufacturing method according to claim 3 , wherein a lubricant material is applied to a surface of the hardener layer .

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