JP2022082009A - Manufacturing method of conductive member, conductive member, electromagnetic coil, motor, generator, and actuator - Google Patents

Abstract

To provide a manufacturing method of a conductive member, the method capable of forming a conductive member having a complicated shape relatively easily, and the conductive member having high reliability, and capable of maintaining a high withstand voltage even when the conductive member is used for an electromagnetic coil.SOLUTION: A manufacturing method of a conductive member includes, in this order, a preparatory step of preparing a conductive wire in which a plurality of linear conductive base materials are bundled, a penetration step of impregnating the conductive wire with a water-soluble paint, an insertion step of inserting the conductive wire impregnated with the water-soluble paint into an insulating heat-shrinkable tube, a first heating step of forming a coated conductive wire by heating the heat-shrinkable tube at a predetermined temperature for a predetermined time and shrinking the heat-shrinkable tube until the conductive wire is covered, a forming step of forming the coated conductive wire into a predetermined shape, and a second heating step of curing the coated conductive wire in the predetermined shape by heating the coated conductive wire.SELECTED DRAWING: Figure 3

Description

The present invention relates to a method for manufacturing a conductive member, a conductive member, an electromagnetic coil, a motor, a generator, and an actuator.

Conductive members capable of conducting a large current are used in fields such as main drive motors for automobiles, aircraft, and ships, and electromechanical devices that require a large current, such as power supplies and power converters. Various conductive members are used as such conductive members, but conventionally, conductive members using conductive wires (for example, braided wires) in which a plurality of linear conductive substrates are bundled are known. There is.

FIG. 15 is a diagram shown for explaining the conventional conductive member 900. As shown in FIG. 15, the conventional conductive member 900 includes a conductive wire 910 (braided wire) in which a plurality of linear conductive base materials 912 are bundled (woven). A terminal 950 is formed at the end of the conductive member 900.

According to the conventional conductive member 900, since the conductive wire 910 in which a plurality of linear conductive base materials 912 are bundled is used, the voids and stitches formed between the conductive base materials 912 expand and contract, thereby causing expansion and contraction. It can be flexibly bent, and it is relatively easy to form a conductive member having a complicated shape such as a three-dimensionally bent shape or a twisted shape.

Japanese Unexamined Patent Publication No. 2017-91862

However, in the conventional conductive member 900, since the gaps and stitches between the conductive base materials 912 expand and contract, it is difficult to maintain the shape of the formed conductive member for a long period of time, and it resonates with external vibration. As a result, the conductive member may expand and contract, causing problems such as disconnection of the conductive member, and thus there is a problem that it is difficult to improve reliability.

Further, since such a conductive member can be flexibly bent and wired, as an example of use of the conductive member, it is wound into a coil shape having at least one winding inductance, and an electromagnetic machine conversion device (for example, a motor, etc.). It can be used for electromagnetic coils of generators, actuators, etc.). In such a case, it is necessary to insulate the conductive member from the surroundings. For example, it is conceivable to use a conductive member having a conductive substrate whose surface is previously coated with an insulating material. However, in such a conductive member, since it is flexibly bent and wired, a large mechanical stress may be locally applied to the insulating material covering the conductive wire, and the insulating material may be damaged or thinned. There is a problem that it is difficult to maintain a high withstand voltage because it is easy to loosen.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to form a conductive member having a complicated shape relatively easily, and it is possible to increase the reliability, and the electromagnetic coil. A method for manufacturing a conductive member that can maintain a high withstand voltage even when used in the above, such a conductive member, and an electromagnetic coil, a motor, and a generator using such a conductive member. And an actuator.

According to one aspect of the present invention, a conductive member having a complicated shape can be formed relatively easily, and the reliability is high, and even when the conductive member is used for an electromagnetic coil, the withstand voltage is maintained in a high state. A method for manufacturing a conductive member for manufacturing a conductive member capable of manufacturing the conductive member is provided. The method for manufacturing the conductive member includes a preparation step of preparing a conductive wire in which a plurality of linear conductive base materials are bundled, a permeation step of permeating the water-soluble paint into the conductive wire, and a permeation step of permeating the water-soluble paint. The coated conductive wire is formed by inserting the conductive wire into an insulating heat-shrinkable tube and heating the heat-shrinkable tube at a predetermined temperature for a predetermined time to shrink the heat-shrinkable tube until it covers the conductive wire. A first heating step for forming the coated conductive wire, a forming step for forming the coated conductive wire into a predetermined shape, and a second heating step for curing the coated conductive wire in the predetermined shape by heating the coated conductive wire. In this order.

In the present specification, "curing" means that the conductive base material constituting the conductive wire cannot be easily moved, and the conductive wire is hardened to such an extent that it is difficult to bend it from a predetermined shape to another shape. It means the state of being struck. Further, "forming" refers to forming a plate or wire into a predetermined shape by bending, twisting, rolling, or the like. Further, "covering the conductive wire" means to cover the side surface of the conductive wire so as to be in close contact with the conductive wire. Further, the "coated conductive wire" refers to a state in which the conductive wire is covered with a heat-shrinkable tube. Furthermore, "inductance" refers to a circuit / structure such as a coil having self-inductance.

According to one aspect of the present invention, a conductive member having a complicated shape can be formed relatively easily, and the reliability is high, and even when the conductive member is used for an electromagnetic coil, the withstand voltage is maintained in a high state. Conductive members capable of this, and electromagnetic coils, motors, generators and actuators using such conductive members are provided. This conductive member includes a conductive wire (braided wire, stranded wire) formed in a predetermined shape in which a plurality of linear conductive base materials are bundled and has at least one winding inductance, and the surface of the conductive base material. A conductive member including a water-soluble coating film formed in the above and an insulating heat-shrinkable tube covering the conductive wire, and the conductive member is cured in the predetermined shape.

According to the method for manufacturing a conductive member and the conductive member of the present invention, since the preparatory step of preparing a conductive wire in which a plurality of linear conductive substrates are bundled is included, the conductive substrate is similarly the same as the conventional conductive member. By expanding and contracting the gaps and stitches formed between each other, it can be flexibly bent, and it is relatively easy to form conductive members with complicated shapes such as three-dimensionally bent shapes and twisted shapes. Can be done.

Further, according to the method for manufacturing a conductive member and the conductive member of the present invention, since the water-soluble paint is infiltrated into the conductive wire, the water-soluble paint is also immersed in the gaps and voids between the conductive base materials. The gaps and voids between the conductive base materials can be filled with the water-soluble paint by allowing them to penetrate, and in the second heating step later, the coated conductive wire is heated to penetrate into the gaps of the conductive member. However, the water-soluble paint can be cured, and the coated conductive wire can be cured in a predetermined shape having at least one winding of inductance. From this, it is possible to prevent the gaps and stitches between the conductive base materials from expanding and contracting after production, and it is possible to maintain the shape of the formed conductive member for a long period of time. Therefore, by resonating with external vibration, the conductive member expands and contracts, and problems such as the position of the conductive member being displaced are less likely to occur, and reliability can be improved.

Further, according to the method for manufacturing a conductive member and the conductive member of the present invention, the conductive wire is inserted by a simple method because it includes an insertion step of inserting the conductive wire impregnated with the water-soluble paint into an insulating heat-shrinkable tube. Can be insulated from the surroundings. Further, even when the conductive member is flexibly bent and wired or wound, the heat-shrinkable tube is arranged so as to cover the conductive wire in which a plurality of conductive substrates are bundled, so that each of the conductive substrates is used. It is possible to prevent a large mechanical stress from being applied locally as compared with the case where the surface of the surface is covered with an insulating material. As a result, it is possible to prevent the heat-shrinkable tube as an insulating material from being damaged or thinned, and it is possible to maintain a high pressure resistance. Furthermore, the heat-shrinkable tube tends to have a constant overall wall thickness, and even when the conductive wire is covered, the thickness of the heat-shrinkable tube, that is, the thickness of the insulating material is less likely to vary. Therefore, even from this viewpoint, the withstand voltage can be maintained in a high state.

Further, according to the method for manufacturing a conductive member and the conductive member of the present invention, since the water-soluble paint is infiltrated into the conductive wire, the water-soluble paint is also immersed in the gaps and voids between the conductive base materials. The gaps between the conductive base materials can be filled with the water-soluble paint, and in the second heating step later, the coated conductive wire is heated to penetrate into the gaps of the conductive member. By curing the sex paint, the coated conductive wire can be cured in a predetermined shape, so that it is possible to prevent a large mechanical pressure from being directly applied to the heat-shrinkable tube. Therefore, the heat-shrinkable tube as an insulating material is less likely to be damaged or thinned, and the pressure resistance can be reliably maintained in a high state.

Further, according to the method for manufacturing a conductive member of the present invention, a first heating step of forming a coated conductive wire, a forming step of forming the coated conductive wire into a predetermined shape having at least one winding inductance, and a coated conductive wire. In order to carry out the second heating step of curing the wire in the predetermined shape in this order, a conductive member having a complicated shape is formed while the conductive wire is covered with an insulating heat-shrinkable tube, and the wire is cured in that shape. can do. As a result, it is possible to relatively easily form a conductive member having a complicated shape, obtain high reliability by curing, and manufacture a conductive member capable of maintaining a high pressure resistance. All of can be realized.

According to the electromagnetic coil, motor, generator and actuator of the present invention, since the conductive member of the present invention is used, compared with an electromagnetic coil using a conductive member having a conductive substrate whose surface is pre-coated with an insulating material. , The resistance is small. Therefore, the electromagnetic coil, the motor, the generator, and the actuator can have a small heat loss and are less likely to have torque deterioration or output deterioration.

It is a figure which shows the conductive member 1 which concerns on Embodiment 1. FIG. It is a figure which shows the state of the conductive wire 10 and the water-soluble coating film 20 in Embodiment 1. FIG. It is a flowchart which shows the manufacturing method of the conductive member which concerns on Embodiment 1. It is a figure which shows for demonstrating the permeation process. It is a figure which shows for demonstrating the insertion process. It is a figure which shows for demonstrating the 1st heating process. It is a figure which shows the state which the coated conductive wire 10' is formed into a coil shape in a forming process. It is a figure which shows the state of forming the step shape of the coated conductive wire 10'in the forming process, and is the figure which shows in order to explain the conductive bonding material permeation process. It is a figure which shows for demonstrating the 2nd heating process. It is a figure which shows the state which the solder is permeated into the end portion of a conductive wire 10. It is a figure which shows for demonstrating the terminal formation process. It is a figure which shows for demonstrating the coil assembly 100 which concerns on Embodiment 1. FIG. It is a figure which shows for demonstrating the conductive member 2 which concerns on Embodiment 2. It is a figure which shows for demonstrating the conductive member 3 which concerns on Embodiment 3. It is a figure which shows for demonstrating the conventional conductive member 900.

Hereinafter, a method for manufacturing a conductive member, an embodiment of a conductive member, an electromagnetic coil, a motor, a generator, and an actuator according to the present invention will be described with reference to the drawings. Each drawing is a schematic diagram showing an example, and does not necessarily accurately reflect actual dimensions, ratios, and the like. Further, in each embodiment, for the configuration having the same basic configuration and features as those of the first embodiment, the same reference numerals as those of the first embodiment are used, or the reference numerals are omitted, and the description of those components will be described. Omit. Hereinafter, the electromagnetic coil may be simply referred to as a coil.

[Embodiment 1]
1. 1. Configuration of conductive member 1 according to embodiment 1 (coil 101A according to embodiment 1)
(1) Appearance of Conductive Member 1 According to Embodiment 1 The appearance of the conductive member 1 according to the first embodiment is that a conductive wire (coated conductive wire 10'described later) in which a plurality of linear conductive base materials are bundled is. The first embodiment is formed into a coil shape surrounding the air core region as a predetermined shape having at least one winding inductance and cured in the shape (hereinafter, formed into a coil shape and cured in the shape). The conductive member 1 according to the above may be referred to as a coil 101A according to the first embodiment).

FIG. 1A shows the outer shape of the coil 101A (electromagnetic coil). In the coil 101A according to the first embodiment, the conductive wire 10 (coated conductive wire 10'described later) is about two times (strictly, about 1.75 times) around the air core region 90A having a substantially rectangular shape when viewed in a plane. ) It is wound. The coil 101A has a rectangular coil shape composed of two facing long side portions X1 and X2 (effective coil portion) and two facing short side portions X3 and X4 (coil end portion). The coil 101A is bent in an arc shape when viewed from the side surfaces of the short side portions X3 and X4, and as shown in FIG. 12 (b) described later, the outer surfaces of the long side portions X1 and X2 are in contact with each other. A plurality of coils 101A (eight in the first embodiment) can be arranged in a ring shape.

In the coil 101A, terminal portions 86A and 86B projecting in parallel are formed on one of the two short side portions X3 and X4 facing each other on the short side portion X3. The two opposing long side portions X1 and X2 of the coil 101A are radially inside (as shown in FIG. 12B) on the other short side portion X4 side of the two opposing short side portions X3 and X4. It has a stepped shape offset to the rotation axis AX1 side when the coils are arranged.

(2) Configuration of Conductive Member 1 (Coil 101A) According to Embodiment 1. FIG. 1 (b) is a side sectional view of Conductive Member 1 (Coil 101A according to Embodiment 1) according to Embodiment 1. As shown in FIG. 1 (b), the conductive member 1 according to the first embodiment includes a conductive wire 10, a water-soluble coating film 20 formed so as to cover the conductive wire 10, a conductive wire 10 and a water-soluble coating film. It is provided with an insulating heat-shrinkable tube 30 that covers 20.

FIG. 1 (c) is a cross-sectional view when the conductive member 1 according to the first embodiment (coil 101A according to the first embodiment) is cut in a region surrounded by the virtual line A of FIG. 1 (a). However, FIG. 1C shows one round of the conductive member 1 that is wound around the air core region 90A about two times. As shown in FIG. 1 (c), a plurality of linear conductive base materials 12 are bundled in the conductive wire 10. Further, the water-soluble coating film 20 is formed on the surface of the conductive base material 12, and the water-soluble coating film 20 is also filled in the gap 16 between the conductive base materials 12. Around the conductive wire 10, a water-soluble coating film 20 formed on the surface of the conductive base material 12 is layered.

As the conductive base material 12, an appropriate one can be used, for example, a copper wire made of copper as a main raw material, a nickel wire made of nickel as a main raw material, a carbon wire made of carbon, a copper wire or the like plated with nickel. Any one of tin-plated plated wire, nickel alloy wire, copper alloy wire, carbon-containing wire, or a composite wire containing two or more of these can be used. In the first embodiment, as the conductive base material 12, a twisted yarn obtained by twisting a plurality of conductor wires (for example, bare copper wire) is used, but one conductor wire may be used. An appropriate thickness of the conductive base material 12 can be used, but in order to reduce the influence of the skin effect, in the first embodiment, the thickness of the conductive base material 12 is preferably 100 μm or less, and the average radius is 50 μm. The following are more preferred.

FIG. 2A is a plan sectional view showing the state of the conductive wire 10 and the water-soluble coating film 20. As shown in FIG. 2A, the conductive wire 10 is a braided wire in which a plurality of linear conductive base materials 12 are flat-knitted, and the number, cross-sectional area, etc. of the conductive base materials 12 are adjusted. The conductive member 1 can be used as a current conduction path through which a current of several hundred A is passed. Voids 14 exist between the conductive base materials 12 of the conductive wires 10, and the voids 14 are filled with the water-soluble coating film 20. Before the water-soluble coating film 20 is formed (cured), the conductive wire 10 has room for movement of the conductive base material 12 and is excellent in flexibility, but the water-soluble coating film 20 is formed (cured). After that, there is no room for the conductive base material 12 to move, and the flexibility is lost. In the first embodiment, the conductive wire 10 is a braided wire in which a plurality of stages are stacked, but a conductive base material 12 which is flat-knitted in one stage may be used, or may be a litz wire group. good.

The water-soluble coating film 20 is cured and can maintain a predetermined shape formed by forming the conductive wire 10. The water-soluble coating film 20 is obtained by infiltrating the water-soluble coating film 20'between the conductive base materials 12 and applying the water-soluble coating film 20 to the surface of the conductive base material 12. Examples of the resin liquid used for the water-soluble coating film 20 include acrylic resin, epoxy resin, urethane resin, polyester resin, polyamine resin and the like. The water-soluble coating film 20 has insulating properties, adhesiveness, and thermosetting properties.

FIG. 2B is a cross-sectional view showing a cross section taken along the line BB of FIG. 2A. As shown in FIG. 2B, in the conductive wire 10, the conductive base material 12 extending in one direction and the conductive base material 12 extending in the other direction are woven alternately, and the conductive wire 10 extends in one direction. A gap 18 between the base material 12 and the conductive base material 12 extending in the other direction (for example, when one of the conductive base materials 12 crosses under the other conductive base material 12 when viewed in cross section). There is a gap) formed on one of the conductive base materials 12. In the conductive member 1, the water-soluble coating film 20 is also formed in the gap 18 to improve the shape stability.

The heat-shrinkable tube 30 is a tubular member made of an insulating resin and having a space formed in the central portion when viewed in cross section. The inner surface of the heat-shrinkable tube 30 is smoothly formed. Therefore, the conductive wire 10 can be smoothly inserted when it is inserted into the heat-shrinkable tube 30. The outer surface of the heat-shrinkable tube 30 is also smoothly formed. Therefore, the manufactured conductive member has less catching and can be smoothly arranged when winding into a coil shape or when mounting.

The heat-shrinkable tube 30 is arranged in close contact with the periphery of the conductive wire 10 by arranging the conductive wire 10 in the space at the center of the heat-shrinkable tube 30 and heat-shrinking the conductive wire 10. The thickness of the heat shrink tube 30 (after heat shrink) is, for example, in the range of 20 μm to 100 μm, for example, 50 μm. The heat-shrinkable tube 30 has heat-shrinkability, and starts shrinking at, for example, 300 ° C. or higher, and has heat resistance at 350 ° C. for 60 seconds. The continuous use temperature is 260 ° C. Further, the heat-shrinkable tube 30 has adhesiveness and thermosetting property. As the resin used as the material of the heat-shrinkable tube 30, any resin having heat-shrinkability and insulating properties can be used, but PTFE (polytetrafluoroethylene) having a small chemical resistance and a small mechanical friction coefficient. Can be preferably used.

2. 2. Method for Manufacturing Conductive Member 1 (Coil 101 According to Embodiment 1 ) According to the first embodiment Next, a method for manufacturing the conductive member 1 (coil 101 according to the first embodiment) according to the first embodiment will be described.
FIG. 3 is a flowchart showing a method of manufacturing the conductive member 1 according to the first embodiment. As shown in FIG. 3, the manufacturing method of the conductive member 1 according to the first embodiment includes a preparation step, a permeation step, an insertion step, a first heating step, a forming step, a second heating step, and terminal formation. The steps (conductive bonding material permeation step) are included in this order.

(1) Preparation Step The preparation step is a step of preparing a conductive wire 10 in which a plurality of linear conductive base materials 12 are bundled (not shown). Specifically, a conductive base material 12 knitted with twisted yarn obtained by twisting a plurality of conductor wires (for example, bare copper wire) is flat-knitted, cut to a predetermined length to form a flat plate, and then braided. A certain conductive wire 10 is formed.

(2) Permeation process FIG. 4A is a diagram shown for explaining the permeation process. As shown in FIG. 4A, in the permeation step, the water-soluble paint is permeated into the conductive wire 10. For example, the inside of a liquid tank, a container, or the like (hereinafter, simply referred to as a liquid tank T) is filled with an aqueous solution of the water-soluble paint 20'. Then, the conductive wire 10 is put into the liquid tank T, and the conductive wire 10 is immersed in the aqueous solution of the water-soluble paint 20'while moving the conductive wire 10. As a result, the water-soluble paint 20'penetrates (penetrates) between the conductive base materials 12 constituting the conductive wire 10.

FIG. 4B is a diagram showing how the water-soluble paint 20'penetrates into the conductive wire 10 in the permeation step. As shown in FIG. 4B, in the permeation step, the water-soluble paint 20'penetrates (penetrates) between the conductive base materials 12 constituting the conductive wire 10, and the conductive wire 10 (microscopically speaking). A water-soluble paint 20'is arranged around the conductive base material 12) constituting the conductive wire 10. At this time, the water-soluble paint 20'is arranged so as to fill the voids 14 between the conductive base materials 12 with the water-soluble paint 20'and to cover the periphery of the conductive wire 10 in a layered manner. The water-soluble paint 20'is an insulating paint, an adhesive paint, and a thermosetting paint. The water-soluble paint may be applied directly to the conductive wire 10.

(3) Insertion Process FIGS. 5 (a) and 5 (b) are side views and cross-sectional views shown for explaining the insertion process. As shown in FIGS. 5 (a) and 5 (b), in the insertion step, the conductive wire 10 impregnated with the water-soluble paint 20'is inserted into the insulating heat-shrinkable tube 30. The heat-shrinkable tube 30 has a space formed inside so that the conductive wire 10 can be inserted, and when inserted, a gap 32 is formed between the heat-shrinkable tube 30 and the conductive wire 10 (water-soluble paint 20'formed around it). Has been done.

(4) First Heating Step FIGS. 6 (a) and 6 (b) are side views and cross-sectional views shown for explaining the first heating step. As shown in FIGS. 6A and 6B, in the first heating step, the heat-shrinkable tube 30 is heated at a predetermined temperature for a predetermined time to shrink the heat-shrinkable tube 30 and heat the conductive wire 10. Cover with shrink tubing 30. Specifically, the heat-shrinkable tube 30 into which the conductive wire 10 is inserted is blown with high-temperature hot air at 300 ° C. to 450 ° C. for a short time (for example, 1 to 2 seconds) to shrink the heat-shrinkable tube 30 to shrink the conductive wire 10. (The gap 32 is small or disappears), and the conductive wire 10 is covered. At this time, the heat-shrinkable tube 30 is pulled from both sides, and the wall thickness (thickness between the inner side surface and the outer side surface) of the heat-shrinkable tube 30 is controlled while applying tensile stress. The rate of heat shrinkage is, for example, 0.1 to 2 (cm / sec). At this time, since the time for blowing the high-temperature hot air is short, a large amount of water remains in the water-soluble paint 20'and it is not cured. Therefore, the conductive wire 10 covered with the heat-shrinkable tube 30 (hereinafter referred to as the coated conductive wire 10') has flexibility.

(5) Forming Step In the forming step, the coated conductive wire 10'is formed into a predetermined shape having at least one winding of inductance.
7 (a) and 7 (b) are a plan view and a side view showing how the coated conductive wire 10'is formed into a coil shape in the forming step. First, a winding die (not shown) having a convex portion having a shape corresponding to the air core region 90A is prepared, and a mold release agent is applied to the entire working region. Next, the coated conductive wire 10'is used as a winding winding, and is wound around the convex portion of the winding die by about 2 turns (strictly, about 1.75 turns) and pressed down. As a result, as shown in FIGS. 7 (a) and 7 (b), the coated conductive wire 10'is coiled in a state where the end portions 86A'and 86B' projecting in parallel with the short side portion X3 are formed. Forming to.

8 (a) and 8 (b) are a plan view and a cross-sectional view showing how the step shape is formed in the forming step. Next, as shown in FIGS. 8 (a) and 8 (b), the coated conductive wire 10 ′ formed into a coil shape is placed in a forming jig (not shown) and pressed to pressurize the short side portion. The coated conductive wire 10'is formed into a stepped shape that is bent in an arc shape when viewed from the side surface of X3 and whose two long side portions are offset on the other short side portion X4 side. In this step, the short side portion X3 is bent in an arc shape when viewed from the side surface, but in order to make the illustration easier to understand, FIGS. 8 (b) and 9 (b) are shown in a linear state. Shows.

(6) Second Heating Step FIGS. 9 (a) and 9 (b) are plan views and cross-sectional views shown for explaining the second heating step. As shown in FIGS. 9A and 9B, the coated conductive wire 10'is cured by heating the coated conductive wire 10'in a predetermined shape as described above. Specifically, in the second heating step, the coated conductive wire 10'is placed in a furnace at 200 ° C. in a formed state with a forming jig (not shown) and heated for 20 to 30 minutes. By this heating, the water-soluble paint 20'of the coated conductive wire 10'is cured by losing water, and becomes a water-soluble coating film 20. As a result, since the void 14 of the conductive wire 10 is cured in a filled state, the flexibility of the coated conductive wire 10'is lost, and the coated conductive wire 10'has a predetermined shape having at least one winding of inductance. Can be cured. Then, the coated conductive wire 10'is removed from the forming jig, taken out, and the terminal portion is cut into a predetermined shape.

(7) Terminal forming process (conductive bonding material permeation process)
Next, the ends 86A'and 86B' of the coated conductive wire 10'are immersed in a solution of the conductive bonding material (solder) to allow the solder to penetrate into the ends 86A' and 86B'.
10 (a) and 10 (b) are views showing how solder is infiltrated into the end of the conductive wire. As shown in FIG. 10A, in the terminal forming step (conductive bonding material infiltration step), first, a flux agent is applied to the end portions 86A'and 86B', and the end portions 86A'and 86B' are coated with the end portions 86A'and 86B'. It is put into the solder solution S heated to 300 ° C. or higher in the solder bath. As a result, the solder solution S permeates the conductive wire 10 which is a braided wire in the heat-shrinkable tube 30, and is in a soldered state. Next, as shown in FIG. 10B, the ends 86A'and 86B' are pulled up from the solder tank T2.
FIG. 11 is a diagram shown for explaining the terminal forming process. Next, the heat shrink tubing 30 at the ends 86A'and 86B' is removed. As a result, the end portions 86A'and 86B' become terminal portions 86A and 86B (see FIG. 11).
In this way, the coil 101A according to the first embodiment can be manufactured.

3. 3. Configuration of Coil Assembly 100 in Embodiment 1. The coil 101A according to the first embodiment constitutes a coil assembly 100 used in a coreless motor in combination with a coil 101B having a similar configuration. The electromechanical device to which the coils 101A and 101B are applied may be any electromechanical device that uses an air-core coil. So-called coreless motors are one of the preferred applications.

FIG. 12 (e) is a perspective view showing the appearance of the coil 101B (second shape coil). As shown in FIG. 12 (e), in the coil 101B as the second shape coil, the side of the two opposing long side portions Y1 and Y2 of the coil 101A on which the terminal portions 86A and 86B are formed is radially outside. It differs from the coil 101A (first shape coil) in that it has an offset step shape. Other than that, it basically has the same configuration as the coil 101A (first shape coil).

FIG. 12A is a perspective view showing an example of a coil assembly 100 used in a coreless motor. Here, a plurality of coils 101A and 101B (numbers in subscripts are index numbers) are arranged along the moving direction ROT of the permanent magnets (not shown) of the rotor to form the coil assembly 100. .. In other words, in the coil assembly 100, the long side portions X1, X2, Y1, Y2 (effective coil portions) of the respective coils 101A and 101B are orthogonal to the moving direction ROT of the magnet. A plurality of coils 101A and 101B are arranged and configured.
The "air-core coil" is a coil in which a conductive member is wound, and can be said to be a type of coil in which an iron core as a salient pole is not arranged inside the winding. The term "winding" here means winding so as to completely surround the air core region over 360 °, and it does not reach one round around the air core region (it does not reach 360 °). It shall also include a winding method that surrounds the air core area of the object.

FIG. 12B is a perspective view of the first coil subassembly 101AS. In the first coil subassembly 101AS, the outer surfaces of the long side portions X1 and X2 of the adjacent coils 101A (first shape coil, see FIGS. 1A and 12D) are in contact with each other. It can be configured by arranging N coils (N is a natural number, 8 in this case) coils 101A (first shape coils) in a ring shape and adhering them to each other.
Further, FIG. 12 (c) is a perspective view of the second coil subassembly 101BS. The second coil subassembly 101BS has N pieces (here, 8) in a state where the outer surfaces of the long side portions X1 and X2 of the adjacent coils 101B (second shape coil, see FIG. 12 (e)) are in contact with each other. It can be configured by arranging the coils 101B (second shape coils) in a ring shape and adhering them to each other.

After preparing the first coil subassembly 101AS and the second coil subassembly 101BS as described above, the first coil subassembly 101AS (see FIG. 12B) is directed from the right side to the left side. , The second coil subassembly 101BS (see FIG. 12 (c)) can be slid and combined to form the coil assembly 100 (see FIG. 13 (a)).

4. Effect of the conductive member 1 and the method for manufacturing the conductive member according to the first embodiment According to the method for manufacturing the conductive member according to the first embodiment, the conductive member 1 and the coil 101A, a plurality of linear conductive base materials 12 are bundled. Since the preparatory step for preparing the conductive wire 10 is included, the voids 14 and stitches formed between the conductive base materials 12 can be flexibly bent by expanding and contracting, as in the conventional conductive member 900. It is relatively easy to form a conductive member having a complicated shape such as a three-dimensionally bent shape or a twisted shape.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, there is a permeation step of permeating the water-soluble paint 20'into the conductive wire 10, so that there is a permeation step between the conductive base materials 12. The water-soluble paint 20'can be impregnated into the voids 14 and the gaps 16 and 18 to fill the gaps between the conductive base materials 12 with the water-soluble paint 20'. By heating the coated conductive wire 10', the water-soluble paint 20'that has penetrated into the gaps of the conductive base material 12 can be cured, and the coated conductive wire 10'has a predetermined one-turn inductance. Can be cured in shape. From this, it is possible to prevent the gaps and stitches between the conductive base materials 12 from expanding and contracting after production, and it is possible to maintain the shape of the formed conductive member 1 for a long period of time. Therefore, by resonating with external vibration, the conductive member expands and contracts, and problems such as the position of the conductive member 1 are less likely to shift, and the reliability can be improved.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, an insertion step of inserting a conductive wire 10 impregnated with a water-soluble paint 20'into an insulating heat-shrinkable tube 30 is performed. Therefore, the conductive wire 10 can be insulated from the surroundings by a simple method. Further, even when the conductive member 1 is flexibly bent and wired or wound, the heat-shrinkable tube 30 is arranged so as to cover the conductive wire 10 in which a plurality of the conductive base materials 12 are bundled, so that the heat-shrinkable tube 30 is conductive. It is possible to prevent a large mechanical stress from being locally applied as compared with the case where the surface of each of the sex substrates 12 is coated with an insulating material. As a result, the heat-shrinkable tube 30 as an insulating material can be prevented from being damaged or thinned, and the pressure resistance can be maintained in a high state. Furthermore, the heat-shrinkable tube 30 tends to have a constant overall wall thickness, and even when the conductive wire is covered, the thickness of the heat-shrinkable tube 30 is unlikely to vary, and the thickness of the insulating material is unlikely to vary. Therefore, even from this viewpoint, the withstand voltage can be maintained in a high state.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, there is a permeation step of permeating the water-soluble paint 20'into the conductive wire 10, so that there is a permeation step between the conductive base materials 12. The water-soluble paint 20'can be impregnated into the voids 14 and the gaps 16 and 18 to fill the gaps between the conductive base materials 12 with the water-soluble paint 20'. By heating the coated conductive wire 10', the water-soluble paint 20'that has penetrated into the voids 14 and the gaps 16 and 18 of the conductive base material 12 can be cured, so that a large mechanical stress is applied to the heat-shrinkable tube 30. Can be more reliably prevented from being directly applied. Therefore, the heat-shrinkable tube as an insulating material is less likely to be damaged or thinned, and the pressure resistance can be reliably maintained in a high state.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the first heating step of forming the coated conductive wire 10'and the forming of the coated conductive wire 10'to a predetermined shape having at least one winding of inductance. In order to carry out the forming step and the second heating step of curing the coated conductive wire 10'in a predetermined shape in this order, the conductive wire 10 has a complicated shape while being covered with the insulating heat-shrinkable tube 30. A member can be formed and cured in that shape. As a result, a conductive member having a complicated shape can be formed relatively easily, high reliability can be obtained by curing, and a conductive member capable of maintaining a high pressure resistance can be manufactured. Everything you do can be achieved.

Further, according to the method for manufacturing a conductive member according to the first embodiment, since the permeation step of permeating the water-soluble paint into the conductive wire is included, the water-soluble paint 20'which is the material of the water-soluble coating film 20 due to the effect of the permeation. Can be spread even between the conductive base materials 12 inside the conductive wire 10 to fill the gaps 14 and the gaps 16 and 18 between the conductive base materials 12. Therefore, it is possible to form a uniform water-soluble coating film with less dripping and bias of the water-soluble coating film as compared with the case of direct coating on the conductive wire 10. As a result, a stable and high-quality conductive member can be obtained.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, since the permeation step of infiltrating the water-soluble paint 20'into the conductive wire 10 is included, the conductive base material 12 is made of the water-soluble paint. The water-soluble paint 20'can be spread around the conductive base material 12 simply by immersing it in the aqueous solution of 20'. Therefore, the water-soluble paint 20'can be formed in a smaller number of steps than the coating film formation by coating. Therefore, not only can a high-quality conductive member be manufactured, but also work efficiency can be improved, resulting in a highly mass-producible conductive member.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, since the conductive wire 10 is a braided wire, the copper plate material is cut, pressed, bent, or the like. It does not have to be manufactured, and it becomes easy to form a desired shape. Further, since the desired shape can be obtained only by bending the braided wire, the number of steps is unlikely to increase and the productivity can be increased. Furthermore, since the braided wire is used, there are few scraps due to cutting, and it becomes easy to reduce the manufacturing cost.

Further, according to the method for manufacturing a conductive member according to the first embodiment, since the conductive wire 10 is a braided wire, the conductive wire 10 can be flexibly bent into a predetermined shape having at least one winding of inductance. It becomes easier to form. Therefore, it is relatively easy to form a conductive path having a complicated shape such as a three-dimensionally bent shape or a twisted shape.

By the way, in general, when an alternating current flows through a conductor, the current density increases on the surface of the conductor due to the skin effect, and decreases as the distance from the surface increases. In particular, when the current contains high-frequency components (for example, power control by high-speed switching by PWM (Pulse Width Modulation) control), rapid charging (regeneration control) and fast discharge (drive) between large-capacity high-torque motors and power sources. In the case of control), etc.), the AC resistance of the conductor tends to be high because the current is concentrated on the surface. According to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, since the conductive wire 10 is a braided wire, the surface of the conductive wire 10 is higher than that of a plate-shaped conductive member having the same cross-sectional area. The area is large and it is possible to prevent the current from concentrating in a predetermined region, and as a result, the conductor resistance can be lowered. Furthermore, since the conductive wire 10 is a braided wire, it is less likely that an eddy current is generated as compared with the case where the conductive wire 10 is formed of a single plate or the like, and it can be expected that the generation of an eddy current of the coil 101A will be reduced.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, since the water-soluble paint 20'is an insulating paint, it is an effect of permeation and is a material of the water-soluble coating film 20. Since a certain water-soluble paint 20'can spread even between the conductive base materials 12 inside the conductive wire 10 and fill the voids 14 between the conductive base materials 12, it is compared with the case where it is applied to the conductive wire 10. It is possible to form a uniform water-soluble coating film 20 without causing dripping or bias of the water-soluble coating film 20. As a result, the conductive member has uniform static characteristics of the insulator and stable insulation characteristics. As a result, the surface of the conductive base material 12 of the conductive wire 10 can be reliably insulated, and problems such as dust leakage, electrolytic corrosion, atmospheric discharge, and electric shock are unlikely to occur, and foreign metal does not come into contact with each other to cause a short circuit. It can also be prevented. Further, since the insulating film is doubly formed together with the insulating heat-shrinkable tube 30, the conductive member and the coil have higher withstand voltage.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, since the water-soluble paint is an adhesive paint, the position of the conductive base material 12 in the conductive wire 10 is surely. It becomes a fixed and stable conductive member and coil. The result is a more reliable conductive member and coil. Further, even after the permeation step, the water-soluble paint 20'is likely to stay around the conductive base material 12.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, since the water-soluble paint is a thermosetting paint, the inside of the conductive wire 10 is heated (heating in the second heating step). The position of the conductive base material 12 is fixed, and the conductive member has a stable shape. The result is a more reliable conductive member.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, the ends 86A'and 86B' of the conductive wire 10 covered with the heat-shrinkable tube 30 are performed after the second heating step. Is immersed in a solution of the conductive bonding material (solder solution S), and the terminal portions 86A and 86B are formed by infiltrating the conductive bonding material (solder solution S) into the end portion of the conductive wire 10. Therefore, it is not necessary to newly attach a metallic terminal, and the terminal portions 86A and 86B can be formed by a simple method of simply immersing the conductive bonding material S in a solution.

Further, according to the method for manufacturing a conductive member according to the first embodiment, the conductive member 1 and the coil 101A, the conductive base material 12 contains copper, nickel, a copper alloy, nickel-containing plated copper, tin-containing plated copper, and carbon. Since it is a composite wire containing any one of the wires or two or more of them, it can be a conductive wire having various characteristics while maintaining high conductivity, and has various characteristics. It becomes a conductive member.

According to the motor, generator and actuator according to the first embodiment, since the coils 101A and 101B according to the above-mentioned first embodiment are used, the motor, the generator and the actuator have the above-mentioned effects.

Further, according to the coils 101A and 101B, the motor, the generator, and the actuator according to the first embodiment, since a conductive member having a conductive wire in which a plurality of linear conductive base materials are bundled is used, the surface of the conductive base material is used. The resistance can be smaller than that of a coil using a conductive member having a conductive wire coated with an insulating material. Therefore, the coils 101A, 101B, the motor, the generator, and the actuator are small in heat loss and are unlikely to deteriorate in torque or output.

[Embodiment 2]
FIG. 13 is a diagram showing a conductive member 2 according to the second embodiment. The method for manufacturing a conductive member according to the second embodiment and the conductive member 2 according to the second embodiment (hereinafter referred to as a method for manufacturing a conductive member according to the second embodiment) are basically the manufacture of the conductive member according to the first embodiment. It has the same configuration as the method and the conductive member 1 according to the first embodiment (hereinafter, referred to as a method for manufacturing the conductive member according to the first embodiment), but the structure of the water-soluble coating film is the manufacture of the conductive member according to the first embodiment. It is different from the case of the method etc. That is, in the method for manufacturing a conductive member according to the second embodiment, as shown in FIG. 13, the water-soluble coating film 20a is formed only around the conductive base material 12, and is not layered. Since the conductive base material 12 is twisted or knitted to form the conductive wire 10 and the water-soluble paint permeates the conductive wire, the water-soluble paint permeates the portion where the conductive base materials are in contact with each other. The water-soluble coating film 20a is not formed.

As described above, the method for manufacturing the conductive member according to the second embodiment is different from the case where the structure of the water-soluble coating film is different from the method for manufacturing the conductive member according to the first embodiment, but the manufacturing of the conductive member according to the first embodiment. Similar to the case of the method and the like, the preparation step of preparing the conductive wire 10 in which a plurality of linear conductive base materials 12 are bundled, and the permeation step of infiltrating the water-soluble paint into the conductive wire according to the conductive member 1, the water-soluble step. It is complicated because it includes an insertion step of inserting a conductive wire impregnated with a sex paint into an insulating heat-shrinkable tube and a second heating step of curing the coated conductive wire in a predetermined shape by heating the coated conductive wire. It is a conductive member that can form a conductive member having a shape relatively easily, has high reliability, and can maintain a high withstand voltage even when the conductive member is used for an electromagnetic coil.

Since the method for manufacturing the conductive member according to the second embodiment has the same configuration as the method for manufacturing the conductive member according to the first embodiment except for the configuration of the water-soluble coating film, the method according to the first embodiment is related to the first embodiment. It has the corresponding effect among the effects of the method for manufacturing the conductive member.

[Embodiment 3]
FIG. 14 is a diagram showing a conductive member 3 according to the third embodiment. The method for manufacturing a conductive member according to the third embodiment and the conductive member 3 according to the third embodiment (hereinafter referred to as a method for manufacturing the conductive member according to the third embodiment) are basically the manufacture of the conductive member according to the second embodiment. It has the same configuration as the method and the conductive member 2 according to the second embodiment (hereinafter, referred to as a method for manufacturing the conductive member according to the second embodiment), but the material of the water-soluble coating film is the manufacture of the conductive member according to the second embodiment. It is different from the case of the method etc. That is, in the method for manufacturing a conductive member according to the third embodiment, the water-soluble paint is a conductive paint, and the water-soluble coating film 20b of the conductive member 3 is a conductive coating film (see FIG. 14).

As described above, the method for manufacturing the conductive member according to the third embodiment is different from the case where the material of the water-soluble coating film is the method for manufacturing the conductive member according to the second embodiment, but the manufacturing of the conductive member according to the second embodiment. As in the case of the method and the like, according to the preparatory step of preparing the conductive wire 10 in which a plurality of linear conductive base materials 12 are bundled, the conductive member 1 and the coil 101A, the water-soluble paint is permeated into the conductive wire. To include a step, an insertion step of inserting a conductive wire impregnated with a water-soluble paint into an insulating heat-shrinkable tube, and a second heating step of curing the coated conductive wire in a predetermined shape by heating the coated conductive wire. It is a conductive member that can form a conductive member having a complicated shape relatively easily, has high reliability, and can maintain a high withstand voltage even when the conductive member is used for an electromagnetic coil. ..

Further, according to the method for manufacturing a conductive member according to the third embodiment, since the water-soluble paint is a conductive paint, the area of the surface of the conductive base material 12 which is a current conduction path becomes pseudo-large. It is possible to further alleviate the concentration of the current in a predetermined region, and as a result, the conductor resistance can be further reduced.

Further, according to the method for manufacturing a conductive member according to the third embodiment, since the water-soluble paint is a conductive paint, the water-soluble paint which is a material of the water-soluble coating film 20b due to the effect of permeation in the manufacturing process. Can spread even between the conductive substrates 12 inside the conductive wire 10 to fill the gaps between the conductive substrates 12, so that dripping or water-soluble coating is performed as compared with the case where the coating is applied to the conductive wire 10. It is possible to form a uniform conductive coating film without causing bias of the film. The result is a conductive member with uniform plating characteristics.

The method for manufacturing the conductive member according to the third embodiment has the same configuration as the method for manufacturing the conductive member according to the second embodiment except for the material of the water-soluble coating film. It has the corresponding effect among the effects of the method for manufacturing the conductive member.

Although the present invention has been described above based on the above embodiment, the present invention is not limited to the above embodiment. It can be carried out in various embodiments within a range that does not deviate from the purpose, and for example, the following modifications are also possible.

(1) The number, material, shape, position, size, etc. of the constituent elements described in the above embodiment are examples, and can be changed as long as the effects of the present invention are not impaired.

(2) In each of the above embodiments, a water-soluble coating film is formed by immersing a conductive wire in an aqueous solution of a water-soluble paint, but the present invention is not limited thereto. For example, the conductive wire 10 may be completely submerged in a liquid tank containing a solution containing an electrodeposition paint and a predetermined voltage may be applied to form a water-soluble coating film 20. In this case, the water-soluble paint 20'penetrates into narrow portions and voids inside the conductive wire 10, and the electrodeposition paint permeates the braided wire from all directions. From this, the water-soluble paint 20'can form the water-soluble coating film 20 in narrow places and voids inside the conductive wire 10, and also forms a uniform water-soluble coating film 20 in all directions of the conductive wire 10. can do. Therefore, it is a high quality conductive member.
In particular, since the water-soluble coating film 20 is an electrodeposition insulating coating film, it is possible to form an electrodeposited insulating coating film in a narrow space or void inside the conductive wire 10, and uniform electricity is applied in all directions of the braided wire. A wear-insulating coating film can be formed. Therefore, the conductive member has a higher dielectric strength.
Further, since the water-soluble coating film 20 is an electrodeposition coating film, the film thickness of the water-soluble coating film 20 can be easily controlled by controlling the concentration of the electrodeposition coating film and the applied voltage. Therefore, the dielectric strength can be controlled according to the intended use of the conductive member, and the conductive member can be used for various electric devices.
When applying the DC voltage, ultrasonic waves may be applied to the aqueous solution in the liquid tank. As a result, bubbles and impurities can be removed from the periphery of the conductive base material 12 by applying ultrasonic waves, and the insulation quality can be improved.

(3) In each of the above embodiments, a water-soluble coating film is formed by immersing a conductive wire in an aqueous solution of a water-soluble paint, but the present invention is not limited thereto. For example, the water-soluble coating film is a thermosetting coating film, and the water-soluble coating film 20 may be formed by the following method. For example, after filling the inside of a liquid tank, a container, or the like (hereinafter, simply referred to as a liquid tank T) with a thermosetting resin solution, the formed conductive wire 10 is put into the inside of the liquid tank. As a result, the water-soluble material permeates (penetrates) between the conductive base materials 12 constituting the braided wire. The conductive wire 10 is pulled up from the liquid tank in a state where the water-soluble material is attached around the conductive base material 12. After that, the conductive wire 10 is heated to solidify the material derived from the water-soluble material adhering to the periphery of the conductive base material 12. Such a process may be used. With such a configuration (method), since the water-soluble coating film is a thermosetting coating film, the conductive member can be further cured by heating. As a result, the conductive member has high shape stability.

(4) In each of the above embodiments, a twisted wire obtained by twisting a conducting wire is used as the conductive base material, but the present invention is not limited thereto. As the conductive base material, a conductive base material having at least a part of carbon material may be used. In this case, there is also an effect that the braided wire is small and lightweight and has excellent corrosion resistance, and the conductive member is small and lightweight and has excellent corrosion resistance.

(5) In each of the above embodiments, the coil shape is used as the predetermined shape, and the conductive member 1 is used as the coil, but the present invention is not limited thereto. As a predetermined shape, it may be used for a connecting member connecting electrodes to each other or a terminal to each other, a harness, a clip lead, or any other appropriate object.

(6) In each of the above embodiments, the conductive member 1 is used as a coil and used for the motor, but the present invention is not limited thereto. The conductive member 1 may be used as a coil and used in a generator or an actuator.

1, 2, 3 ... Conductive member, 10 ... Conductive wire (braided wire), 10'... Coated conductive wire, 12 ... Conductive substrate 14 ... Void, 16, 18 ... Gap, 20, 20a, 20b ... Water-soluble coating Membrane, 20'water-soluble paint, 30 ... heat-shrinkable tube, 86A, 86B ... terminal, 86A', 86B' ... end, 90A ... air core region, 100 ... coil assembly, 101A, 101B ... coil, 101AS, 101BS ... Subassembly

Claims (13)

A preparatory process for preparing a conductive wire in which a plurality of linear conductive base materials are bundled, and
The permeation step of permeating the water-soluble paint into the conductive wire,
An insertion step of inserting the conductive wire impregnated with the water-soluble paint into an insulating heat-shrinkable tube, and
The first heating step of forming a coated conductive wire by heating the heat-shrinkable tube at a predetermined temperature for a predetermined time and shrinking the heat-shrinkable tube until it covers the conductive wire.
A forming step of forming the coated conductive wire into a predetermined shape, and
A method for manufacturing a conductive member, which comprises, in this order, a second heating step of curing the coated conductive wire in the predetermined shape by heating the coated conductive wire. The method for manufacturing a conductive member according to claim 1, wherein the conductive wire is a braided wire. The method for manufacturing a conductive member according to claim 1 or 2, wherein the water-soluble paint is an insulating paint. The method for manufacturing a conductive member according to claim 1 or 2, wherein the water-soluble paint is a conductive paint. The method for manufacturing a conductive member according to any one of claims 1 to 4, wherein the water-soluble paint is an adhesive paint. The method for manufacturing a conductive member according to any one of claims 1 to 5, wherein the water-soluble paint is a thermosetting paint. In the subsequent stage of the second heating step, the end portion of the conductive wire covered with the heat-shrinkable tube is immersed in a solution of the conductive bonding material to allow the conductive bonding material to permeate the end portion of the conductive bonding material. The method for manufacturing a conductive member according to any one of claims 1 to 6, further comprising a terminal forming step of forming the terminal. The conductive substrate is one of copper, nickel, copper alloy, nickel-containing plated copper, tin-containing plated copper, and carbon-containing wire, or a composite wire containing two or more of these. The method for manufacturing a conductive member according to any one of claims 1 to 7. A conductive wire in which a plurality of linear conductive base materials are bundled and formed in a predetermined shape having at least one winding of inductance.
A water-soluble coating film formed on the surface of the conductive substrate and
A conductive member including an insulating heat-shrinkable tube covering the conductive wire.
The conductive member is a conductive member characterized in that it is cured in the predetermined shape. An electromagnetic coil characterized by being formed by using the conductive member according to claim 9. A motor characterized by being formed by using the electromagnetic coil according to claim 10. A generator characterized by being formed by using the electromagnetic coil according to claim 10. An actuator characterized by being formed by using the electromagnetic coil according to claim 10.

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