JPH09246036A - Coil of electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent insulation resin from flowing out on acount of viscosity drop at the time of drying, by winding a filament tape which is formed of woven fabric or non-woven fabric or sheet making and contains hardening agent, on the outer periphery of an insulating tape. SOLUTION: An insulation tape and a tape 10 containing hardening agent are wound on the outer periphery of a coil conductor 1, binding 5 is applied, the obtained element is impregnated with insulating resin 4, it is hardened, and the element is accommodated in an iron core, thus forming a coil. The tape 10 containing hardening agent has filaments which contain hardening agent like imidazole and easily passes liquid, and is formed of woven fabric or non- woven fabric or a sheet. The tape 10 has unevenness on the surface. The hardening agent accelerates the hardening of the insulation resin 4 being in contact with the inner peripheral part, and hardens the insulation resin 4 after impregnation on the outemost layer, more quickly than that the high temperature viscosity of the insulation resin 4 in the coil 1 is decreased at the time of drying and the resin flows out to the outside of the coil. Therby the flowing-out of the insulation resin at the time of drying is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil for electric equipment manufactured by drying and curing after impregnation with an insulating resin, and more particularly to a coil for electric equipment capable of improving the sealing property of an impregnating material.

[0002]

2. Description of the Related Art Conventionally, coils made of an insulating resin impregnated with a coil conductor have been widely used as coils for electric equipment. Further, this type of coil is classified as a full impregnation method or a coil single impregnation method depending on the timing of impregnation even if the coil has the same sectional structure. In the full impregnation method, a coil conductor with an insulating tape wound around it is housed in an iron core, bound, and then impregnated with an insulating resin.
This is a curing method. In addition, the coil single impregnation method is
This is a method in which a coil conductor is wrapped around an insulating tape, bound, impregnated and cured with an insulating resin, and then stored in an iron core.

6 to 8 are cross-sectional views schematically showing the structure of a coil of an electric device formed by the full impregnation method or the single coil impregnation method, and FIG. 9 shows a coil conductor applied to this coil. It is sectional drawing which shows a structure typically. As shown in FIG. 9, the coil conductor 1 has a structure in which a plurality of strands 2 are individually insulated by a strand insulation material 3, and the number of strands or the shape and arrangement of the strands are It is not limited to that shown in the figure.

As shown in FIG. 6, the coil of the electric equipment is
A main insulating layer 4 made of an insulating tape impregnated with an insulating resin is formed on the outer circumference of the coil conductor 1, and a bind 5 is partially provided on the outer circumference of the main insulating layer 4.

As shown in FIG. 7, a coil of an electric device has a structure in which a film-like tape 6 that does not allow liquid to pass is wound around the outer periphery of the main insulating layer 4 described above, and further, in FIG. As shown, instead of the film-shaped tape 6, there is a structure in which a fibrous tape 7 that allows liquid to easily pass through is wound around the outer periphery of the main insulating layer 4 described above.

The fibrous tape 7 is formed of woven cloth, non-woven cloth or papermaking. Since the coil of such an electric device has irregularities on the coil surface, it is advantageous when the insulating resin bonds the coil and the bind 5 due to the anchor effect.

[0007]

However, in the coil of the electric device as described above, the main insulating layer 4 or the fibrous tape 7 is apt to allow liquid to pass therethrough, so that the impregnated insulating resin is viscous due to the high temperature during drying. There is a problem that it tends to drop and flow out of the coil.

When the impregnated insulating resin in the coil flows out, voids are formed between the wires 2 in the coil and inside the main insulating layer 4, so that partial discharge occurs especially in the case of high voltage equipment. A phenomenon that causes a problem in electrical insulation occurs.

On the other hand, in the coil of the electric device shown in FIG. 7, since the film tape 6 of the outermost layer has a property of not allowing liquid to pass through, the insulating resin impregnated inside the coil has its viscosity lowered by the high temperature during drying. However, the insulating resin has the advantage that it does not easily flow out of the coil. On the other hand, however, the film tape 6 may have a releasing action depending on the material, and the coil adhered by the insulating resin and the bind 5 tend to be separated from each other on the coil surface, so that sufficient adhesive strength cannot be obtained. There is.

The present invention has been made in consideration of the above situation, and prevents the outflow of the insulating resin due to the decrease in viscosity during drying,
Moreover, it is an object of the present invention to provide a high-performance and highly reliable coil of an electric device having sufficient adhesive strength between the binding and the coil surface.

[0011]

According to a first aspect of the present invention, a coil formed by winding an insulating tape around an outer circumference of a coil conductor is housed in an iron core, bound, bound with an insulating resin, and cured. In a coil of a fully impregnated electric device, a fibrous tape formed of woven cloth, non-woven cloth or paper and containing a hardening accelerator for accelerating hardening of the insulating resin is wound around the outer circumference of the insulating tape. It is a coil of electrical equipment that has been used.

Further, the invention according to claim 2 is such that a coil formed by winding an insulating tape around the outer periphery of a coil conductor is bound, impregnated with an insulating resin, hardened, and housed in an iron core. In a coil of electric equipment of the type, a fibrous tape formed of woven cloth, non-woven cloth or paper and containing a hardening accelerator for accelerating hardening of the insulating resin is wound around the outer circumference of the insulating tape. It is a coil of electrical equipment.

Further, the invention according to claim 3 is a full impregnation method in which a coil formed by winding an insulating tape around the outer periphery of a coil conductor is housed in an iron core, bound, bound with an insulating resin and hardened. In the coil of an electric device, the outer periphery of the insulating tape in the portion of the coil that extends outside the iron core is formed of woven cloth, non-woven cloth, or papermaking, and contains a hardening accelerator for accelerating the hardening of the insulating resin. A fibrous tape is wound, and a film tape is wound around the outer periphery of the insulating tape in the portion housed in the core of the coil to form a coil of an electric device.

The invention according to claim 4 is to impregnate a coil formed by winding an insulating tape around an outer periphery of a coil conductor, impregnating an insulating resin, curing the coil, and hardening the coil to store the coil in a single core. In the coil of the electric equipment of the method, the outer periphery of the insulating tape of the portion of the coil outside the iron core is formed of a woven fabric, a non-woven fabric or papermaking, and a curing accelerator for accelerating the curing of the insulating resin. The contained fibrous tape is wound, and the film-shaped tape is wound around the outer periphery of the insulating tape in the portion accommodated in the iron core of the coil to form a coil of an electric device.

Further, the invention according to claim 5 is a full impregnation method in which a coil formed by winding an insulating tape around an outer periphery of a coil conductor is housed in an iron core, bound, bound with an insulating resin and hardened. In a coil of an electric device, the insulating resin contains a curing accelerator for accelerating self-curing, and is formed by woven cloth, non-woven cloth or papermaking,
A coil of an electric device is formed by winding a fibrous tape containing a hardening accelerator for accelerating the hardening of the insulating resin between the coil conductor and the insulating tape.

According to the invention of claim 6, the coil formed by winding the insulating tape around the outer periphery of the coil conductor is bound, impregnated with the insulating resin, hardened, and housed in the iron core. In a coil of electric equipment of the method, the insulating resin contains a curing accelerator for accelerating the self-curing, is formed by woven cloth, non-woven fabric or papermaking, and is a curing material for accelerating the curing of the insulating resin. A fibrous tape containing a promoter is a coil of an electric device wound between the coil conductor and the insulating tape.

Further, the invention according to claim 7 is the coil of an electric device according to claim 5, wherein a film tape is used instead of the fibrous tape.

The invention according to claim 8 is the coil of an electric device according to claim 6, wherein a film tape is used instead of the fibrous tape. (Operation) Therefore, in the inventions corresponding to claims 1 and 2, by taking the above means, the insulating resin on the outer peripheral side in contact with the effect promoting agent contained in the fibrous tape cures faster than inside the coil. Therefore, after the insulating resin on the outer peripheral side is cured, it is possible to prevent the insulating resin inside the coil whose viscosity has decreased due to the high temperature during drying from flowing out, and there is unevenness on the surface of the fibrous tape in contact with the bind. Since the unevenness exists and brings about an anchor effect, it is possible to secure a sufficient adhesive strength between the bind and the coil surface, and thus it is possible to realize high performance and high reliability.

Particularly, in the invention according to claim 1, since the insulating resin is impregnated after binding, the hardening accelerator contained in the fibrous tape bonds the coil and the binding when the insulating resin is hardened. Since it acts on, it is possible to further improve the adhesive strength between the coil and the bind.

The inventions according to claims 3 and 4 are, in the inventions according to claims 1 and 2, a film tape is wound around the outer periphery of the insulating tape in a portion within the iron core. The same action as the action corresponding to claims 1 and 2 can be achieved.

Further, the inventions corresponding to claims 5 and 6 are:
Since the insulating resin on the outer peripheral side in contact with the effect accelerator contained in the fibrous tape cures faster than inside the coil conductor, the inside of the coil conductor whose viscosity has decreased due to the high temperature during drying after the insulating resin on the outer peripheral side hardens The insulating resin can be prevented from flowing out, and the effect promoter contained in the insulating resin accelerates the curing of the insulating resin. Therefore, the insulating resin on the outer peripheral side of the fibrous tape can be prevented from flowing out. There is unevenness on the surface of the insulating tape that is in contact, and since this unevenness provides the anchor effect, it is possible to secure sufficient adhesive strength between the bind and the coil surface, thus realizing high performance and high reliability. can do.

In particular, in the invention according to claim 5, since the insulating resin is impregnated after binding, the curing accelerator contained in the insulating resin is used for bonding the coil and the bind when the insulating resin is cured. Since it works, the adhesive strength between the coil and the bind can be further improved.

In the inventions corresponding to claims 7 and 8, in the inventions corresponding to claims 5 and 6, a film tape is used instead of the fibrous tape.
The same action as the action corresponding to 6 can be obtained.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a surface external view schematically showing the structure of a coil of an electric device according to the first embodiment of the present invention, and FIG. 2 is a schematic view showing the structure of the coil. 6 is a cross-sectional view, the same parts as those in FIGS. 6 to 9 are denoted by the same reference numerals, and detailed description thereof will be omitted. Only different parts will be described here.

That is, the coil according to the present embodiment is
The purpose is to prevent the insulating resin from flowing out due to a decrease in viscosity during drying and to achieve sufficient adhesive strength between the binding and the coil surface. Specifically, as shown in FIGS. 1 and 2, It has a structure in which a fibrous hardening accelerator containing tape 10 is wound around the outer periphery of the main insulating layer 4 around the coil conductor 1. This structure can be applied to either the full impregnation method or the coil single impregnation method.

In the case of the full impregnation method, the coil is obtained by winding the insulating tape and the curing accelerator containing tape 10 around the outer periphery of the coil conductor 1 in an iron core and binding it to the coil 5 and then applying an insulating resin. It is completed by being impregnated and cured.

In the case of the coil single impregnation method, the coil 5 is wound around the outer periphery of the coil conductor 1 with the insulating tape and the curing accelerator containing tape 10 and the binding 5 is applied to the coil to impregnate and cure the insulating resin. After that, it is stored in the iron core and completed.

The hardening accelerator-containing tape 10 is a fibrous material which contains a hardening accelerator such as imidazole or a tertiary amine and allows liquids to easily pass therethrough, and can be formed by woven cloth, non-woven cloth or papermaking. And has unevenness on the surface. The curing accelerator is a catalyst for promoting the curing of the insulating resin forming the main insulating layer 4.

With such a structure, the curing accelerator contained in the curing accelerator-containing tape 10 accelerates the curing of the insulating resin in contact with the inner peripheral portion, so that the impregnated insulating resin inside the coil is heated to a high temperature during drying. As a result, the insulating resin impregnated in the outermost layer can be cured earlier than the viscosity is reduced and the oil flows out of the coil. That is, it is possible to prevent the insulating resin from flowing out during drying.

On the other hand, since the hardening accelerator containing tape 10 having irregularities on the surface is wound around the portion of the coil to which the bind 5 is applied, it is possible to sufficiently maintain the adhesive strength between the coil and the bind 5. it can.

In the fully impregnated coil, the insulating resin on the contact surface between the coil and the bind 5 can increase the adhesive strength by the action of the curing accelerator contained in the curing accelerator-containing tape 10.

As described above, according to the present embodiment, even if the impregnated insulating resin inside the coil is reduced in viscosity during drying, it becomes difficult to pass through the curing-accelerator-containing tape 10. It is possible to prevent the resin from flowing out of the coil. Therefore, voids do not exist in the main insulating layer 4 or between the wires 2, and it is possible to suppress a phenomenon that causes an insulation problem such as partial discharge. Furthermore, sufficient adhesive strength can be maintained between the coil and the bind 5.

In addition, in the case of the fully impregnated type coil, the adhesive strength between the coil and the bind 5 can be further improved. (Second Embodiment) FIG. 3 is a cross-sectional view schematically showing the configuration of a coil of an electric device according to a second embodiment of the present invention, in which the same parts as in FIGS. 1, 2 and 7 are shown. The same reference numerals are given and detailed description thereof is omitted, and only different portions will be described here.

That is, the coil according to the present embodiment is
This is a modification of the first embodiment, and is specifically shown in FIG.
As shown in FIG. 5, in the portion outside the iron core, the hardening accelerator containing tape 10 is provided on the outer periphery of the main insulating layer 4 as in the first embodiment.
However, the coil conductor 1 is replaced with the hardening accelerator containing tape 10 in the portion housed in the iron core.
It has a structure in which a film-shaped tape 6 that does not allow liquid to easily pass is wound around the outer periphery of the main insulating layer 4. Note that, as described above, either the full impregnation method or the coil single impregnation method can be applied.

In the case of the coil, in the case of the full impregnation method, an insulating tape is wound around the outer periphery of the coil conductor 1, and a hardening accelerator containing tape 10 is wound around the portion outside the iron core and is housed in the iron core. After the film-shaped tape 6 is wound on the straight part, it is housed in the iron core and the bind 5 is applied.
It is completed by impregnating and curing the insulating resin.

In the case of the coil alone impregnation method, an insulating tape is wound around the outer periphery of the coil conductor 1, and a hardening accelerator containing tape 10 is wound around the portion outside the iron core, so that the iron core is wound on the iron core. The linear portion to be accommodated is bound with a film tape 6 wound around, bound 5 to impregnate and cure with an insulating resin, and then accommodated in an iron core for completion.

According to this structure, in the portion outside the iron core, the viscosity of the impregnated insulating resin inside the coil is lowered by the high temperature during drying due to the hardening accelerator of the hardening accelerator-containing tape 10 as described above. The insulating resin impregnated in the outermost layer can be cured faster than it flows out of the coil.

Further, in the straight portion accommodated in the iron core, the film-shaped tape 6 makes it difficult for the impregnated insulating resin to pass through. On the other hand, since the hardening accelerator containing tape 10 having irregularities on the surface is wound around the portion of the coil where the bind 5 is applied, the adhesive strength between the coil and the bind 5 can be sufficiently maintained.

In the fully impregnated coil, the insulating resin on the contact surface between the coil and the bind 5 can increase the adhesive strength by the action of the curing accelerator contained in the curing accelerator-containing tape 10.

As described above, according to this embodiment, even when the viscosity of the impregnated insulating resin inside the coil decreases during drying, the curing accelerator-containing tape 10 and the film tape 6 are included.
Since it becomes difficult to pass through the layer of, the impregnated insulating resin can be prevented from flowing out of the coil. Therefore, voids do not exist in the main insulating layer 4 or between the wires 2, and it is possible to suppress a phenomenon that causes an insulation problem such as partial discharge. Furthermore, sufficient adhesive strength can be maintained between the coil and the bind 5.

In addition, in the case of the full impregnation type coil, the adhesive strength between the coil and the bind 5 can be further improved. (Third Embodiment) FIG. 4 is a sectional view schematically showing the structure of a coil of an electric device according to a third embodiment of the present invention. The same parts as those in FIGS. The detailed description thereof will be omitted and only different parts will be described here.

That is, the coil according to the present embodiment is
This is a modification of the first embodiment and is specifically shown in FIG.
As shown in FIG. 4, a main insulating layer 11 containing a hardening accelerator is provided in place of the main insulating layer 4, and the hardening accelerator containing tape 10 is interposed between the coil conductor 1 and the main insulating layer 11. It has a different structure.

In the case of the full impregnation method, the coil is formed by winding a hardening accelerator containing tape 10 and an insulating tape around the outer circumference of the coil conductor 1 in that order and storing them in an iron core to which a binding 5 is applied. It is completed by impregnating and curing the insulating resin containing the agent.

In the case of the coil alone impregnation method, the coil 5 is provided with the hardening accelerator-containing tape 10 and the insulating tape wound around the outer periphery of the coil conductor 1 in that order, and the binding 5 is applied to the coil. After the insulating resin is impregnated and cured, it is housed in an iron core and completed.

With such a structure, the curing resin contained in the curing-accelerator-containing tape 10 accelerates the curing of the insulating resin, so that the impregnated insulating resin in the coil conductor 1 is viscous due to the high temperature during drying. The insulating resin that has been impregnated in the outermost layer can be cured sooner than it is lowered and flows out of the coil.

Further, the impregnated insulating resin in the main insulating layer 11 does not flow out to the outside because the hardening is accelerated by the action of the hardening accelerator contained in advance. On the other hand, since the uneven main insulating layer 11 becomes the surface of the coil, it is advantageous for bonding the coil and the bind 5.

In the fully impregnated coil, the insulating resin on the contact surface between the coil and the bind 5 is the main insulating layer 11.
The adhesive strength after curing can be increased by the action of the curing accelerator contained in.

As described above, according to the present embodiment, even if the impregnated insulating resin inside the coil is reduced in viscosity during drying, it cannot pass through the curing accelerator containing tape 10 and the impregnated insulating resin of the main insulating layer 11 is prevented. Since the curing of the resin is accelerated by the action of the curing accelerator, the contained insulating resin can be prevented from flowing out of the coil. Therefore, voids do not exist in the main insulating layer 11 or between the wires 2, and it is possible to suppress a phenomenon that causes an insulation problem such as partial discharge. Furthermore, sufficient adhesive strength can be maintained between the coil and the bind 5.

In addition, in the case of the full impregnation type coil, the adhesive strength between the coil and the bind 5 can be further improved. (Fourth Embodiment) FIG. 5 is a cross-sectional view schematically showing the configuration of a coil of an electric device according to a fourth embodiment of the present invention, in which the same parts as those of FIGS. 1, 2 and 7 are shown. The same reference numerals are given and detailed description thereof is omitted, and only different portions will be described here.

That is, the coil according to the present embodiment is
This is a modification of the first embodiment and is specifically shown in FIG.
As shown in FIG. 6, a structure in which a main insulating layer 11 containing a curing accelerator is provided in place of the main insulating layer 4 and a film tape 6 is interposed between the coil conductor 1 and the main insulating layer 11. Has become.

In the case of the full impregnation method, the coil is a coil conductor 1 on which the hardening accelerator containing tape 10 and an insulating tape are successively wound, which is housed in an iron core and is subjected to binding 5 and then hardening is accelerated. It is completed by impregnating and curing the insulating resin containing the agent.

In the case of the coil alone impregnation method, the coil 5 is provided with the hardening accelerator-containing tape 10 and the insulating tape wound around the outer periphery of the coil conductor 1 in that order, and the binding 5 is applied to the coil. After the insulating resin is impregnated and cured, it is housed in an iron core and completed.

With such a structure, the film tape 6 makes it difficult for the insulating resin in the inner peripheral portion to pass therethrough, so that the viscosity of the impregnated insulating resin in the coil conductor 1 decreases due to the high temperature during drying. Even then, the outflow to the outside of the coil can be prevented.

Further, the impregnated insulating resin in the main insulating layer 11 does not flow out because the hardening is accelerated by the action of the hardening accelerator contained in advance. On the other hand, since the uneven main insulating layer 11 becomes the surface of the coil, it is advantageous for bonding the coil and the bind 5.

In the fully impregnated coil, the insulating resin on the contact surface between the coil and the bind 6 can increase the adhesive strength after curing due to the action of the curing accelerator contained in the main insulating layer 2.

As described above, according to this embodiment, the impregnated insulating resin inside the coil cannot pass through the layer of the film tape 6 even if the viscosity of the insulating resin decreases during drying.
It is possible to prevent the contained insulating resin from flowing out of the coil. Therefore, voids do not exist in the main insulating layer 11 or between the wires 2, and it is possible to suppress a phenomenon that causes an insulation problem such as partial discharge. Furthermore, sufficient adhesive strength can be maintained between the coil and the bind 5. In addition, in the case of the fully impregnated type coil, the adhesive strength between the coil and the bind 5 can be further improved.

[0057]

As described above, according to the first and second aspects of the present invention, the insulating resin on the outer peripheral side in contact with the effect accelerator contained in the fibrous tape cures faster than the inside of the coil. After curing the insulating resin of, the viscosity of the insulating resin inside the coil decreased due to the high temperature during drying, and it is possible to prevent the insulating resin from flowing out, and there is unevenness on the surface of the fibrous tape that is in contact with the binding. Since an anchor effect is provided, a sufficient adhesive strength can be secured between the bind and the coil surface, and thus a coil for electric equipment having high performance and high reliability can be provided.

Further, according to the inventions of claims 3 and 4, in the inventions of claims 1 and 2, since the film tape is wound around the outer periphery of the insulating tape in the portion inside the iron core, It is possible to provide a coil of an electric device having the same effects as those of the first and second embodiments.

Further, the inventions corresponding to claims 5 and 6 are:
Since the insulating resin on the outer peripheral side in contact with the effect accelerator contained in the fibrous tape cures faster than inside the coil conductor, the inside of the coil conductor whose viscosity has decreased due to the high temperature during drying after the insulating resin on the outer peripheral side hardens The insulating resin can be prevented from flowing out, and the effect promoter contained in the insulating resin accelerates the curing of the insulating resin. Therefore, the insulating resin on the outer peripheral side of the fibrous tape can be prevented from flowing out. There is unevenness on the surface of the insulating tape that is in contact, and since this unevenness provides the anchor effect, it is possible to secure sufficient adhesive strength between the bind and the coil surface, and thus have high performance and high reliability. A coil of electric equipment can be provided.

Further, the inventions corresponding to claims 7 and 8 are the same as those of claims 5 and 6, since the film tape is used instead of the fibrous tape in the inventions of claims 5 and 6. It is possible to provide a coil of an electric device that produces

[Brief description of drawings]

FIG. 1 is a surface appearance diagram schematically showing a configuration of a coil of an electric device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically showing the configuration of a coil according to the same embodiment.

FIG. 3 is a sectional view schematically showing the configuration of a coil of an electric device according to a second embodiment of the present invention.

FIG. 4 is a sectional view schematically showing the configuration of a coil of an electric device according to a third embodiment of the invention.

FIG. 5 is a sectional view schematically showing the configuration of a coil of an electric device according to a fourth embodiment of the present invention.

FIG. 6 is a cross-sectional view schematically showing a configuration of a coil of a conventional electric device formed by a full impregnation method or a coil single impregnation method.

FIG. 7 is a cross-sectional view schematically showing a configuration of a coil of a conventional electric device formed by a full impregnation method or a coil single impregnation method.

FIG. 8 is a cross-sectional view schematically showing a configuration of a coil of a conventional electric device formed by a full impregnation method or a coil single impregnation method.

FIG. 9 is a cross-sectional view schematically showing a configuration of a coil conductor applied to a coil of a conventional electric device.

[Explanation of Codes] 1 ... Coil conductor. 2 ... strands. 3 ... Strand insulation. 4, 11 ... Main insulating layer. 5 ... Bind. 6 ... Film tape. 10 ... A tape containing a curing accelerator.

Claims (8)

[Claims] 1. A coil of a total impregnation type electric device in which a coil formed by winding an insulating tape around an outer circumference of a coil conductor is housed in an iron core, bound, impregnated with an insulating resin and cured, and a woven cloth, A coil of an electric device, comprising a fibrous tape formed of a non-woven fabric or a paper-making machine, and a fibrous tape containing a hardening accelerator for accelerating hardening of the insulating resin, wound around the outer circumference of the insulating tape. 2. A coil of a single coil impregnation type electric device, wherein a coil formed by winding an insulating tape around an outer periphery of a coil conductor is bound, impregnated with an insulating resin, hardened and housed in an iron core. A coil of an electric device, characterized in that a fibrous tape formed of cloth, non-woven fabric or papermaking and containing a curing accelerator for accelerating the curing of the insulating resin is wound around the outer periphery of the insulating tape. . 3. A coil of a total impregnation type electric device in which a coil formed by winding an insulating tape around an outer periphery of a coil conductor is housed in an iron core, bound, impregnated with an insulating resin, and cured, Around the outer periphery of the insulating tape of the portion that goes out of the iron core, a fibrous tape formed by woven cloth, non-woven cloth or papermaking, and containing a hardening accelerator for accelerating the hardening of the insulating resin is wound, A coil of an electric device, wherein a film tape is wound around an outer periphery of the insulating tape in a portion of the coil that is housed in an iron core. 4. A coil of a coil-impregnated electric device, wherein a coil formed by winding an insulating tape around an outer periphery of a coil conductor is bound, impregnated with an insulating resin, hardened, and housed in an iron core. Around the outer periphery of the insulating tape at the portion outside the iron core of the coil, a fibrous tape formed of woven cloth, non-woven cloth or paper and containing a hardening accelerator for accelerating hardening of the insulating resin is wound. A coil of an electric device, wherein a film-shaped tape is wound around an outer periphery of the insulating tape in a portion housed in the iron core of the coil. 5. A coil of a total impregnation type electric device in which a coil formed by winding an insulating tape around an outer circumference of a coil conductor is housed in an iron core, bound, impregnated with an insulating resin and cured, and the insulating resin is used. Contains a curing accelerator for accelerating the self-curing, and the fibrous tape containing the curing accelerator for accelerating the curing of the insulating resin is formed by woven cloth, non-woven cloth or papermaking. A coil of an electric device, which is wound between a coil conductor and the insulating tape. 6. A coil of a coil-impregnated electric device in which a coil formed by winding an insulating tape around an outer periphery of a coil conductor is bound, impregnated with an insulating resin, hardened, and housed in an iron core. The insulating resin contains a curing accelerator for accelerating self-curing, is formed by woven cloth, non-woven fabric, or papermaking, and contains a curing accelerator for accelerating the curing of the insulating resin. Is wound between the coil conductor and the insulating tape. 7. The coil of an electric device according to claim 5, wherein a film tape is used instead of the fibrous tape. 8. The coil of an electric device according to claim 6, wherein a film tape is used instead of the fibrous tape.