JP2010251615A - Method of manufacturing conductor coil with insulating film, and conductor coil with insulating film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a conductor coil with an insulating film that removes restrictions of conventional processing and restrictions on coil design when a linear wire is wound into a coil, solves the problem that an insulating film is damaged by a foreign matter during the processing, and forms the thick insulating film with uniform thickness. <P>SOLUTION: The wire made of an electric conductor is wound into the coil first, a surface of the wire is subjected to electrodeposition painting using an electrodeposition paint liquid containing a thermosetting resin as a resin component, and then the coil 10 is heated while being pressed along the axis to subject a deposited film 20 of paint particles to fusion and curing reaction between wires which are adjacent along the axis of the coil 10, thereby forming the insulating film 22 covering wire surfaces. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a conductor coil with an insulating coating and a conductor coil with an insulating coating that are suitable for use in a reactor or the like that is an inductance component.

  Conventionally, a conductor coil used for a reactor or the like that is an inductance component is conventionally formed by first forming an insulating film so as to cover the surface of a linear wire (elementary wire) that is an electric conductor, and then winding the coil into a predetermined shape. And manufactured.

  In this case, the insulating film is formed by applying a liquid (varnish) having a predetermined viscosity by dissolving an insulating resin (for example, polyamideimide) in a solvent, and then drying it. In general, a method of forming a film by a curing reaction has been used.

However, when a linear wire with an insulating film applied in advance is wound around a coil having a predetermined shape by a molding machine, the following various problems arise.
First, the insulation coating on the surface of the wire material is subjected to a compressive force on the inner diameter side of the coil and a tensile force on the outer diameter side due to the winding process, and an unreasonable force is applied to the insulation coating, thereby distorting the insulation coating. In some cases, the insulating coating breaks or cracks occur.

Also, in order to avoid such problems, it is difficult to increase the curvature of bending during winding (because bending cannot be performed with tight bending R), and the bending radius must be increased. There is a problem that there is a restriction on the way of bending the part (how to apply the R of the bent part of the coil).
Along with this, there has been a problem that the degree of freedom in designing the coil shape is naturally limited.

  In addition, when bending the wire with a molding machine, dust and other foreign matters may adhere to the insulating coating and bite into the insulating coating. Any of these may be a factor that impairs the reliability of the insulation performance of the conductor coil with an insulation coating.

  In addition, in the case of the conventional method of forming an insulating film by applying and curing an insulating resin varnish to the wire as described above, it is difficult to form the insulating film into a thick film (film thickness is 25 μm). This is a cause that makes it difficult to sufficiently increase the voltage resistance (dielectric breakdown voltage) when a high voltage is applied to the conductor coil with an insulating coating.

  In addition to the above, in the case of a conductor coil with an insulating coating manufactured by the above method, the coil itself is easily stretched and deformed as if it were an accordion, and the following problems have arisen during subsequent handling.

  For example, a reactor is known in which a core is molded with a mixed material of soft magnetic powder and a thermosetting resin, and a coil with an insulating coating is integrated in an embedded state inside the molded body. As the manufacturing method, with the conductor coil set inside the outer case or container, a mixture of soft magnetic powder dispersed in a thermosetting resin liquid is injected into the outer case or container, Thereafter, a method has been proposed in which this is heated to a predetermined temperature and a resin is cured and reacted for a predetermined time to form a core and at the same time be integrated with a coil (for example, Patent Document 1 below).

  As another manufacturing method, a conductor coil with an insulating coating is set in a cavity of a molding die, and in that state, a mixed material of soft magnetic powder and thermoplastic resin is injected into the cavity by an injection molding machine, and the core is At the same time as molding (injection molding), a method of integrating a coil therein is also considered.

  In the former case, when the mixed material of soft magnetic powder and resin is poured into the outer case or container and flowed, the fluid pressure acts on the coil, and in the latter case, the cavity When the mixed material is injected into the cavity with a strong pressure and flowed in the cavity, the pressure of the flow acts on the coil, which causes the coil to be deformed as a whole or due to partial displacement. It is easy to do.

In this case, when the coil is deformed from the regular shape, the performance as the reactor is impaired.
In particular, when the core is formed by the latter injection molding, a strong injection pressure and a flow pressure of the mixed material act on the coil in the cavity, and it is very difficult to prevent the coil from being deformed.

In addition, there exist some which were disclosed by following patent document 2 and patent document 3 as prior art with respect to this invention.
Patent Document 2 discloses that an insulating coating layer is formed on the surface of a conductor wire by electrodeposition coating. This is an electrodeposition coating of an insulating coating layer on a linear conductor wire itself. This is different from the present invention.

  Patent Document 3 also discloses that an insulating coating layer is formed on the outer periphery of the conductor by electrodeposition coating. This also forms an insulating coating layer on a linear conductor. However, it is different from the present invention.

JP 2007-27185 A JP 2007-227241 A JP 2006-252942 A

The present invention is based on the above circumstances, removes the conventional processing restrictions when winding a linear wire around a coil, and can significantly increase the degree of freedom in processing and coil design. At the same time, it is possible to solve the problem of foreign matter adhering to the insulating coating and causing scratches or perforations in the insulating coating, and the insulating coating can be formed into a thick film with a uniform thickness. It is made for the purpose of providing the manufacturing method of a conductor coil.
Another object of the present invention is to provide a method for manufacturing a coil with an insulating coating and a conductor coil with an insulating coating that make the conductor coil with an insulating coating difficult to deform.

  Thus, claim 1 relates to a method of manufacturing a conductor coil with an insulating coating, in which a wire made of an electric conductor is first wound around the coil, and then an electrodeposition paint containing a thermosetting resin as a resin component is used. Electrodeposition coating is performed on the surface of the wire, and the insulating film is formed so as to coat the surface of the wire by curing reaction of the coating film of the paint particles.

  According to a second aspect of the present invention, in the first aspect, the coil formed by winding the wire is pulled in the axial direction of the coil so that the entire coil is stretched in the axial direction by elastic deformation, and the adjacent wire in the axial direction. A gap is formed between them or the gap is enlarged, and the electrodeposition coating is applied to the surface of the wire.

  A third aspect of the present invention is the deposition according to any one of the first and second aspects, wherein, after the electrodeposition coating, the coil is pressed in the axial direction to coat adjacent wires in the axial direction with the wire. Adjacent wires are bonded and bonded together via the insulating coating by causing the coating to adhere through the coating and curing reaction of the deposited coating in the contact state.

  According to a fourth aspect of the present invention, in the third aspect, the precipitation coating is softened by heating, and the curing reaction is performed in a state where the precipitation coatings between adjacent wires in the axial direction are fused. Features.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the conductor coil is an edgewise coil formed by winding a rectangular wire in the width direction.

  The present invention relates to a conductor coil with an insulating coating, which is formed by winding a wire made of an electric conductor around the coil, the insulating coating being formed on the wire so as to cover the surface, and the axial direction of the coil Wires adjacent to each other are bonded and fixed in the axial direction of the coil by the insulating coating.

  According to a seventh aspect of the present invention, in the sixth aspect, the conductor coil is an edgewise coil formed by winding a rectangular wire in the width direction.

Effects and effects of the invention

  As described above, in the manufacturing method of the present invention, a wire made of an electric conductor is first wound into a coil, and then the electrodeposition coating is applied to the surface of the wire using an electrodeposition paint containing a thermosetting resin as a resin component. Then, the coating film is subjected to a curing reaction to form the insulating film in a state of covering the surface of the wire.

  That is, in the conventional manufacturing method, an insulating film is first applied to the wire, and then the wire with the insulating film is wound around the coil. Is wound around the coil, and then an insulating coating is formed on the surface of the wire constituting the coil.

  According to the manufacturing method of the present invention, when a wire is wound, an insulating film is not yet formed on the surface thereof, so that an unreasonable force is applied to the insulating film by the winding of the wire. It is possible to solve the problem that distortion occurs and the insulating coating breaks or cracks in some cases.

  In addition, the restrictions on the winding process of the wire rod are eliminated to prevent excessive strain on the insulating coating, and the winding process of the wire rod itself is facilitated. Can be increased.

  In addition, when bending the wire with a molding machine, it is possible to eliminate the problem that dust or other foreign matter adheres to the insulating film and bites into the insulating film, causing the insulating film to be damaged or perforated. .

Another major feature of the present invention is that the insulating coating on the surface of the wire is formed by electrodeposition coating.
Electrodeposition coating (here, the case of cationic electrodeposition coating) is performed by immersing an object to be coated (conductor coil) in an electrodeposition coating liquid containing a resin component (here, thermosetting resin), and using this as a cathode. By applying a voltage between the positive electrode and the direct current, the positively charged paint particles in the paint liquid migrate to the cathode side, and the paint particles are deposited on the surface of the conductor coil to form a film.

In this electrodeposition coating, the film formed by the deposition of paint particles on the surface of the conductor coil then grows and gradually increases the film thickness, which increases the electrical resistance of the deposited film itself. go.
As a result, the paint particles are deposited in preference to the place where the film thickness is thin, and the entire film is formed.
In the case of anionic electrodeposition coating, the conductor coil is connected to the anode, and the negatively charged paint particles in the paint liquid migrate to the conductor coil side on the anode side to form a film.

In such electrodeposition coating, the deposited film is formed with a uniform film thickness on the surface of the wire, and the film thickness can also be increased as compared with the conventional coating method.
Moreover, in this electrodeposition coating, a film can be formed with a uniform film thickness even after the wire is bent into a coil.

For example, when paint is applied by spraying, the paint is applied by spraying evenly on the portion between the wire adjacent to the axial direction of the coil and the inner peripheral surface or outer peripheral surface of the coil. However, in the case of electrodeposition coating, coating particles are electrophoresed and deposited on the surface of the coil to form a film, so that the entire thickness is uniform regardless of the location. A film can be formed.
As a result, it is possible to impart high voltage resistance to the conductor coil.

  In this case, the coil formed by winding the wire is pulled in the axial direction of the coil to stretch the entire coil in the axial direction by elastic deformation, forming a gap between the adjacent wires in the axial direction or expanding the gap, In this state, it is preferable to perform electrodeposition coating on the surface of the wire (Claim 2).

  By doing in this way, the outer diameter side surface and the inner diameter side of the coil can be more easily applied to the portion between the wire rods adjacent to each other in the axial direction of the coil, more specifically to the surface facing the axial direction. A film can be formed with a film thickness equal to the surface.

  In this case, the gap is formed between the wires or the gap is enlarged when the wire is wound around the coil and formed, and the wire adjacent to the coil in the axial direction is in contact with the wire. When a gap is formed between them, and there is a gap in advance between the wire and the wire in the forming state, it means that the gap is further expanded.

  Next, the third aspect of the present invention is to pressurize the coil in the axial direction after electrodeposition coating to bring the adjacent wires in the axial direction into close contact with each other through the deposited film, and to cure the deposited film in the adhered state. The adjacent wires are integrally bonded and fixed together via an insulating coating, and according to the manufacturing method of claim 3, the entire coil (the portion that is wound) can be fixed in an integrated state, It is possible to solve the problems that have arisen in the past in handling of the coated conductor coil.

  Specifically, for example, when forming a reactor using a conductor coil with an insulating coating, when a core is formed by pouring a mixed material of soft magnetic powder and resin into an outer case or container, or with an insulating coating in the cavity When the core is formed by injecting a mixed material of soft magnetic powder and resin into the cavity with the conductor coil set, the coil is deformed as a whole by the pouring or injection pressure or flow pressure of the mixed material. It is possible to effectively suppress the partial displacement and partial displacement, and this makes it possible to improve the performance as a reactor.

  In this case, the electrodeposition-coated deposited film can be softened by heating, and the deposited films between the adjacent wires in the axial direction can be fused to each other, and then a curing reaction can be performed (claims). Item 4).

  In this way, the adhesive strength between the insulating coatings between the wires can be further increased, and consequently the mechanical strength of the entire coil can be further increased. Therefore, it is possible to further effectively suppress the deformation due to the simple deformation and the partial displacement.

  A sixth aspect of the present invention relates to a conductor coil with an insulating coating, which is formed by bonding and fixing wires adjacent to each other in the axial direction of the coil with an insulating coating in the axial direction of the coil. In the conductor coil with an insulating coating, it is possible to effectively suppress deformation of the conductor coil entirely or partially during subsequent handling.

  The present invention can be applied to a coil using a wire having various cross-sectional shapes such as a circular shape, an elliptical shape, a regular quadrangular shape, and a rectangular shape. It is suitable to be applied to the case of an edgewise coil having a configuration in which the coil is wound around the coil and stacked in the axial direction of the coil (claims 5 and 7).

It is a perspective view which shows the (conductor) coil which is one Embodiment of this invention in the state before insulating film formation. It is the figure which showed an example of the deformation | transformation of a coil. It is the figure which showed an example of the deformation | transformation different from FIG. 2 of a coil. It is the figure which showed typically the method of the electrodeposition coating of the coil of the embodiment. It is the figure which showed the state which pulled the coil of the same embodiment to the axial direction. It is sectional drawing which showed the process of the insulating film formation in the embodiment. It is the figure which showed the pressurization state of the coil by the pressurization jig used for the method of the embodiment.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes an example of a conductor coil, which is an edgewise coil (hereinafter simply referred to as a coil) used for a reactor as an inductance component in a state before an insulating film is formed.

The coil 10 is formed by winding a rectangular wire in the width direction and stacking it in the thickness direction (longitudinal direction) of the wire to form a coil shape, and is adjacent to the axial direction of the coil 10 in a free-form state that is wound and formed. Wires are in contact with each other.
In the figure, reference numeral 14 denotes a coil terminal in the coil 10.

The coil 10 shown in FIG. 1 simply formed by winding an electric conductor wire into a coil shape is easily stretched and deformed as if it were an accordion as shown in FIG. As shown in Fig. 4, it is easily twisted and deformed.
The coil 10 may be made of various materials such as copper, aluminum, copper alloy, and aluminum alloy.

In the present embodiment, the linear conductor wire is wound in this manner, electrodeposition is applied to the formed coil 10, and the insulating coating 22 (see FIG. 6) is formed so as to cover the surface of the wire. .
Specifically, cationic electrodeposition is applied to the surface of the wire using an electrodeposition paint containing a thermosetting resin as a resin component, and the paint particles are deposited in the form of a film on the surface of the wire.
Here, an epoxy resin, a urethane resin, or the like can be suitably used as the thermosetting resin.
In some cases, coating particles may be deposited on the surface of the wire by anion electrodeposition.

FIG. 4 schematically shows a method for performing electrodeposition coating by cationic electrodeposition.
In the figure, 16 is an electrodeposition tank, 18 is an electrodeposition coating liquid, and the electrodeposition coating liquid 18 contains a thermosetting resin as the resin component together with a curing agent.
In addition, the electrodeposition coating liquid may contain a curing catalyst, a surfactant and other components.

  In this electrodeposition coating, the coil 10 is immersed in the electrodeposition coating liquid 18, and a voltage is applied between the coil 10 and the anode 19 that is also immersed in the electrodeposition coating liquid 18 as a cathode, and a direct current flows. As a result, the positively charged paint particles in the electrodeposition paint liquid 18 are migrated toward the coil 10 on the cathode side, and the paint particles are deposited on the surface of the coil 10 to form the deposited film 20 (see FIG. 6). .

At that time, as shown in FIG. 5, the coil 10 is pulled in the axial direction, the entire coil 10 is stretched in the axial direction by elastic deformation, and a gap S is formed between the adjacent wires in the axial direction. Apply electrodeposition coating at
In this embodiment, the coil 10 is immersed in the electrodeposition coating liquid 18 in a state where it is laid sideways.
Here, the gap S between the wires adjacent to each other in the axial direction is preferably about 3 to 10 mm.

FIG. 6I schematically shows a state in which the gap S is formed between the adjacent wires in this way.
In addition, this FIG. 6 represents the wire in the coil 10 with a cross-sectional shape.
FIG. 6 (II) shows a state in which the deposited film 20 is formed by applying electrodeposition coating in this state to deposit coating particles on the surface of the wire.

After forming the deposited film 20 as described above, the insulating film 22 can be formed so as to cover the surface of the wire by heating and heating the deposited film 20 to cause a curing reaction.
In this case, the thickness of the insulating coating 22 varies depending on the applied voltage, the application time, the composition of the electrodeposition coating, etc. in the electrodeposition layer 16, but preferably the thickness of the insulating coating 22 is 15 to 100 μm. .
The reason is that a sufficient withstand voltage (dielectric breakdown voltage) can be imparted to the coil 10 with an insulating coating by setting the film thickness to 15 μm or more. On the other hand, increasing the film thickness beyond 100 μm is a manufacturing process. Because it is difficult.

  However, here, after electrodeposition coating, the coil 10 is pressed in the axial direction using, for example, a pressurizing jig 24 shown in FIG. 7, and the wires adjacent in the axial direction as shown in FIG. In this state, the film is heated to a temperature higher than the glass transition temperature of the deposited film 20 so that the deposited films are first fused to each other, and subsequently cured at a temperature equal to or higher than the curing temperature of the deposited film 20.

  Specifically, the coil 10 after electrodeposition coating is inserted into the heating furnace in a state where the coil 10 after electrodeposition coating is pressed in the axial direction by the pressurizing jig 24 of FIG. And the subsequent curing reaction are continuously performed.

  As shown in FIG. 1, the coil 10 has an elliptical shape in plan view, specifically, a semicircular shape portion 26 on both left and right ends in a plan view, and a linear shape portion 28 that connects them in the left-right direction. On the other hand, the pressurizing jig 24 shown in FIG. 7 has a pair of upper and lower pressing members 30 in the oval shape corresponding to the planar shape of the coil 10 and screws them together. The center bolts connected to each other, and the pressers 34 provided at a plurality of locations (here, 4 locations) along the circumferential direction of the pair of clamping members 30 so as to face each other in the vertical direction in the figure. It has a structure.

In the pressurizing jig 24, the bolts 32 are tightened to hold the coil 10 at both ends in the axial direction with the projection-shaped pressers 34, thereby pressing the coil 10 in the axial direction.
Each presser 34 is constituted by a screw, and the protrusion amount can be adjusted by screw operation.

  As described above, the deposited coating 20 is fused between the wires in the pressurized state and then cured, so that the wires adjacent in the axial direction are cured as shown in FIG. 6 (IV). The coil 10 with the insulating coating 22 in which the entire coil 10 (however, excluding the coil terminal 14) is integrated is obtained by adhesive bonding through the insulating coating 22.

In addition, after electrodeposition coating, first, the deposited film 20 is cured in a state where the coil 10 is not pressurized in the axial direction, and then a thermosetting resin paint is sprayed thereon, and then the coil is formed using the above-described pressure jig 24. 10 may be compressed in the axial direction, and the resin paint sprayed in that state may be fused and cured.
By doing so, the thickness of the insulating coating can be further increased, and the withstand voltage can be further increased.

In this case, as the resin coating for spraying, it is preferable to use a material that is the same material as the deposited film 20 of the base or a material having good adhesion.
For example, when the deposited film 20 is an epoxy resin film, it is preferable to use an epoxy resin as a resin coating for spraying.

  According to the present embodiment as described above, when the wire is wound around the coil, since the insulating coating 22 is not yet formed on the surface thereof, an unreasonable force is applied to the insulating coating 22 by the winding of the wire, This can solve the problem that the insulating coating 22 is distorted and the insulating coating 22 is broken or cracked in some cases.

  In addition, the restriction on the winding process of the wire rod so as to prevent excessive strain on the insulating coating 22 is eliminated, the winding process of the wire rod itself is facilitated, and the degree of freedom in designing the coil shape is also associated with this. It can be raised naturally.

  In addition, when the wire is bent by a molding machine, dust and other foreign matters adhere to the insulating coating 22, and the problem that the insulating coating 22 is damaged or perforated is eliminated. Can do.

In this embodiment, since the insulating coating 22 on the surface of the wire is formed by electrodeposition coating, the insulating coating 22 can be formed with a uniform thickness on the surface of the wire, and the thickness is also thicker than that of the conventional coating method. Is possible.
Moreover, in this electrodeposition coating, a film can be formed with a uniform film thickness even after the wire is bent into a coil.
As a result, a high withstand voltage (dielectric breakdown voltage) can be applied to the coil 10.

  Moreover, in this embodiment, after the electrodeposition coating, the coil 10 is pressed in the axial direction, the wires adjacent in the axial direction are brought into close contact with each other through the deposited coating 20, and the deposited coatings 20 are fused to each other by heating in the contacted state. By adhering and curing, the adjacent wires are integrally bonded and fixed together via the insulating coating 22, so that the entire coil 10 (the wound portion) can be fixed in an integrated state. The problems that have conventionally occurred when handling the coil 10 can be solved.

Nippon Paint Co., Ltd. is applied to the coil 10 shown in FIG. 1 (number of turns is 25) wound and molded using a flat copper wire of 8 mm width and 1 mm thickness according to JIS C3104 manufactured by Hitachi Cable, Ltd. Electrodeposition coating was performed using a cationic power electrodeposition paint of “Power Top U-CP-70” manufactured by the company.
This electrodeposition coating is obtained by mixing a resin liquid obtained by reacting a bisphenol A type epoxy resin and diethanolamine with diphenylmethane diisocyanate blocked with ethylene glycol mono-2-ethylhexyl ether in a predetermined ratio.

  The electrodeposition paint is diluted with deionized water to a resin solid content concentration of 15% to obtain an electrodeposition paint liquid 18, which is adjusted to a bath temperature of 30 ° C., and the coil terminal 14 of the coil 10 is fixed to the cathode. It was immersed in the electrodeposition coating liquid 18 and a voltage was applied. The voltage was increased to 300 V in 5 seconds after the start of application, and then electrodeposition coating was performed by maintaining 300 V for 175 seconds.

After electrodeposition coating, it was washed with water, and the coil 10 was pressurized in the axial direction with the pressurizing jig 24 shown in FIG. 7. In this state, this was inserted into a 150 ° C. heating furnace and held for 1 hour, and then at 180 ° C. Baking (curing) treatment for 20 minutes, then air cooling, forming an insulating film 22 with a film thickness of 80 μm on the surface of the wire in the coil 10, and adhesively bonding wires adjacent in the axial direction through the insulating film 22, The entire coil 10 was integrally fixed.
The glass transition temperature of the deposited coating 20 was 130 ° C. as measured by DSC, and the curing temperature was 174 ° C.

The dielectric breakdown voltage of the coil 10 thus obtained was measured and found to be 1500V.
The volume resistivity of the insulating coating was 5 × 10 ¹⁴ Ωcm.
Here, the dielectric breakdown voltage was measured according to JIS C2110 using a dielectric breakdown voltage tester manufactured by Yasuda Seiki Seisakusho.
The volume resistivity was measured according to JIS C2151 using TAKEDA RIKEN TR-8601 HIGH MEGOHM METER.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be implemented and configured in various forms and forms without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Coil 18 Electrodeposition coating liquid 20 Deposited film 22 Insulating film 24 Pressure jig

Claims (7)

  A wire made of an electric conductor is first wound into a coil, and then electrodeposition is applied to the surface of the wire using an electrodeposition paint containing a thermosetting resin as a resin component, and the coating film of paint particles is cured. A method for producing a conductor coil with an insulating coating, comprising: forming an insulating coating so as to cover the surface of the wire.   In Claim 1, the coil formed by winding the wire rod is pulled in the axial direction of the coil, the entire coil is stretched in the axial direction by elastic deformation, and a gap is formed between adjacent wire rods in the axial direction or gaps are formed. A method of manufacturing a conductor coil with an insulating coating, wherein the electrodeposition coating is applied to the surface of the wire by enlarging.   In any one of Claims 1 and 2, after the electrodeposition coating, the coil is pressed in the axial direction so that the wires adjacent in the axial direction are brought into close contact with each other through the deposited film covering the wire, A method of manufacturing a conductor coil with an insulating coating, wherein the deposited coating is cured and reacted in the contact state, whereby adjacent wires are integrally bonded and bonded via the insulating coating.   The conductor with an insulation coating according to claim 3, wherein the precipitation coating is softened by heating, and the curing reaction is performed in a state in which the precipitation coatings between adjacent wires in the axial direction are fused. Coil manufacturing method.   5. The method for producing a conductor coil with an insulating coating according to claim 1, wherein the conductor coil is an edgewise coil formed by winding a rectangular wire in the width direction.   The wire is formed by winding a wire made of an electric conductor around a coil, and the wire is covered with an insulating film so as to cover the surface. Wires adjacent to each other in the axial direction of the coil are covered with the insulating film. A conductor coil with an insulating coating, characterized by being bonded and fixed in the axial direction.   7. The conductor coil with an insulating coating according to claim 6, wherein the conductor coil is an edgewise coil formed by winding a rectangular wire in the width direction.

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