JP7220072B2 - Iron core for stationary induction electric machine - Google Patents

Description

The present invention relates to an iron core for a static induction electric machine, and in particular, a static induction electric machine suitable for use in a part or all of the iron core of a static induction electric machine such as a transformer or a reactor using a magnetic ribbon, for example, an amorphous magnetic ribbon. It relates to iron cores.

Energy consumption continued to increase along with global economic growth, reaching 3.3 times in the approximately 50 years from 1965 to 2015.

Generally, silicon steel sheets, which have low loss and high magnetic permeability, have been used as core materials for transformers. Demand for high-efficiency transformers using amorphous magnetic ribbons (hereinafter referred to as amorphous transformers) is increasing.

The amorphous magnetic ribbon has a higher electrical resistivity than a silicon steel sheet, and is as thin as 1/10 of the plate thickness, so that eddy current loss is small. In addition, since the amorphous magnetic ribbon is amorphous, domain wall movement is easy and hysteresis loss is small, so the no-load loss that always occurs even when there is no load on the transformer is low. have the advantage of Taking advantage of this advantage, amorphous transformers are attracting attention as a technology that is highly effective in introducing them into distribution networks with low operating load factors.

Transformers using amorphous wound cores have hitherto been commercialized as 6.6 kV-class, relatively small-capacity transformers from the standpoint of productivity. On the other hand, in the power distribution system from the power plant to the consumer, looking at the upstream of the power distribution field, most of the special high voltage class transformers exceeding 22 kV have high mechanical strength and can be easily enlarged. A silicon steel plate transformer using a silicon steel plate for an iron core is used.

Therefore, with the increase in size of amorphous transformers, a large energy saving effect can be expected by changing transformers of special high voltage class from silicon steel sheets to amorphous magnetic ribbons.

For example, the transmission loss that occurs in power distribution in Japan is about 5%, which is one of the lowest in the world. Even with the improvement, 100 million kWh of electricity can be saved, so it can be seen that the application of highly efficient amorphous transformers is useful.

In addition, it is expected that amorphous transformers with low no-load loss will greatly reduce the environmental burden when applied to renewable energy applications where the output is not constant and standby power consumption during low-load operation is a problem.

When increasing the size of the amorphous wound core, it is necessary to prevent the load from concentrating in one place because thin magnetic ribbons such as amorphous magnetic ribbons are sensitive to stress and fragile.

As a countermeasure, for example, Patent Literature 1 describes a distributed support structure that divides and supports an amorphous wound core. In Patent Literature 1, the amorphous wound core is divided into a plurality of blocks and supported to reduce the internal stress due to the weight of the amorphous wound core, thereby reducing iron loss and noise.

Unlike a silicon steel sheet, the surface of the amorphous magnetic ribbon is not coated with an insulating material, and insulation is maintained by an oxide film formed on the surface of the amorphous magnetic ribbon. Therefore, the electric resistance between the inner and outer circumferences of the amorphous wound iron core is small, and when the iron core comes into contact with a metallic support member, there is a possibility of electrical continuity or short circuit.

Therefore, the iron core supporting member described in Patent Document 1, which is introduced to disperse the stress due to the increase in size, is made of metal with high rigidity due to the nature of supporting the iron core. There is a possibility that

As a countermeasure, it is possible to cover the metal support fittings with an insulator such as a pressboard, but there is a high possibility that the vibration of the iron core and windings due to the excitation of the transformer will cause the metal fittings to slip or break. This is insufficient as a countermeasure.

Japanese Patent No. 6198978

As described above, when the size of the amorphous wound core is increased, metal distributed support members are provided to support the core in order to prevent deterioration of the magnetic properties due to the stress of its own weight. The electrical resistance between the inner and outer peripheries of the core is small, and when the iron core comes into contact with a metal support member, there is a possibility of electrical continuity or short circuit.

The present invention has been made in view of the above points, and an object of the present invention is to support an iron core formed of a magnetic thin strip such as an amorphous magnetic thin strip by a support member. To provide an iron core for a static induction electric machine capable of forming a wound iron core without causing a short circuit.

In order to achieve the above objects, the present invention provides a core for a stationary induction electric machine, in which a wound core constructed by laminating a plurality of magnetic ribbons is supported by a core support member,
The wound core has a yoke portion joined to a core main leg into which a winding is inserted to form a ring shape to form a closed magnetic circuit,
The core support member includes a first insulating portion of the core support member arranged in the straight portion of the yoke portion, and a core support member installed at both corner portions (curved portions) on the inner peripheral side of the yoke portion. second and third insulating portions; and a metal portion of the core supporting member supporting the yoke portion of the wound core via the first, second and third insulating portions of the core supporting member. Characterized by

According to the present invention, it is possible to form a wound core without causing an electrical short circuit, even if a core made of a magnetic ribbon such as an amorphous magnetic ribbon is supported by a supporting member.

1 is a diagram showing a part of an amorphous wound core using an amorphous magnetic ribbon as a magnetic ribbon as Example 1 of the core for stationary induction electric machine of the present invention; FIG. FIG. 2 is an exploded perspective view showing a core supporting member employed in the amorphous wound core of FIG. 1; FIG. 2 is a view showing a part of an amorphous wound core using an amorphous magnetic ribbon as a magnetic ribbon as Example 2 of the core for stationary induction electric machine of the present invention. FIG. 4 is an exploded perspective view showing a core supporting member employed in the amorphous wound core of FIG. 3; FIG. 3 is a view showing a part of an amorphous wound core using an amorphous magnetic ribbon as a magnetic ribbon and a core supporting member incorporated therein as Example 3 of the core for stationary induction electric machine of the present invention. FIG. 4 is a diagram showing a part of an amorphous wound core using an amorphous magnetic ribbon as a magnetic ribbon and a core supporting member incorporated therein as Example 4 of the core for stationary induction electric machine of the present invention.

The iron core for a static induction electric machine according to the present invention will now be described based on the illustrated embodiments. In addition, in each embodiment, the same reference numerals are used for the same components.

FIG. 1 shows an amorphous wound core 1 using an amorphous magnetic ribbon as a magnetic ribbon as Example 1 of a core for a stationary induction electric machine of the present invention, and FIG. A state in which the insulating portions 2a1, 2a2 and 2a3 and the metal portion 2b are separated is shown.

As shown in FIG. 1, the amorphous wound core 1 of this embodiment is supported by insulating portions 2a1, 2a2 and 2a3 and a metal portion 2b of a core supporting member, which will be described later.

In general, the amorphous wound iron core 1 is prepared by laminating cut amorphous magnetic ribbons so that the lamination surfaces form a U-shape, inserting windings, and then joining left and right amorphous magnetic ribbons by a method called butt joint or lap joint. are laminated alternately, and the core main leg 1b into which the winding is inserted and the yoke portion 1a are joined to form a ring shape to form a closed magnetic circuit.

In Patent Literature 1 described above, the core support member has a structure that supports the amorphous wound core from below, but the core support member 2 of the present embodiment has a structure that lifts and supports the amorphous wound core 1. Therefore, a through hole 3 for lifting the amorphous wound core 1 is provided in the upper portion of the metal portion 2b of the core support member.

The core support member 2 that supports the amorphous wound core 1 of the present embodiment has insulating portions 2a1, 2a2, and 2a3 of the core support member that contact the amorphous wound core 1, and does not come into contact with the amorphous wound core 1. A portion is formed by the metal portion 2b of the core support member.

Specifically, as shown in FIG. 2, the core support member 2 of the present embodiment is disposed in the straight line portion of the yoke portion 1a of the amorphous wound core 1, and is a desktop platform-shaped core having legs at both ends of a flat plate. The insulating portion 2a1 of the support member and the corner portions (curved portions) 1c on the inner peripheral side of the yoke portion 1a of the amorphous wound core 1 are installed, and the cross section is formed of a straight portion and arc portions extending from both ends thereof, and has a substantially half-moon shape. The insulating portion of the desk-top-shaped core support member is arranged in the linear portion of the yoke portion 1a of the amorphous wound core 1 via the insulating portions 2a2 and 2a3 of the core-supporting member and the insulating portion 2a1 of the desk-top-shaped core supporting member. It consists of a portion that matches the flat plate shape of 2a1 and a portion that matches the linear portions of the insulating portions 2a2 and 2a3 of the core support member whose cross section is approximately half-moon shaped, and consists of the metal portion 2b of the core support member having a through hole 3 at the top. It is The circular arc portions of the insulating portions 2a2 and 2a3 of the core support member having a substantially half-moon cross section are arranged to match the corner portion (curved portion) 1c of the yoke portion 1a.

As shown in FIG. 1, the core support member 2 of the present embodiment configured in this way has an insulating portion 2a1 of the core support member in the shape of a tabletop on a straight line portion of the yoke portion 1a of the amorphous wound core 1. Approximately half-moon shaped insulating portions 2a2 and 2a3 of the core support member are arranged at both corner portions (curved portions) 1c on the inner peripheral side of the yoke portion 1a of the core 1, respectively, and the insulating portions 2a1, 2a2 and 2a of the core support member are arranged. is matched with the flat plate shape of the insulating portion 2a1 of the desk-top-shaped core supporting member at the metal portion 2b of the core supporting member, and is matched with the straight portions of the insulating portions 2a2 and 2a3 of the core supporting member having a substantially half-moon shape in cross section. The amorphous wound core 1 is supported (the insulating portion 2a1 of the core support member and the metal portion 2b of the core support member are in surface contact).

As a result, the force generated by the amorphous wound core 1 toward the core window 5 can be received by the metal portion 2b of the core support member having high rigidity. Since the insulating portions 2a1, 2a2 and 2a3 of the core support member are interposed therebetween, it is possible to avoid contact between the amorphous wound core 1 and the metal portion 2b of the core support member and an electrical short circuit.

In addition, since the insulating portions 2a1, 2a2 and 2a3 of the core support member and the metal portion 2b of the core support member can ensure the rigidity for supporting the amorphous wound core 1, the function as the core support member can also be exhibited. It is configured.

In addition, since the amorphous magnetic ribbon is as thin as 25 μm in thickness and has low rigidity, a force is generated toward the inside of the core window 5 at the corner portion (curved portion) 1 c on the inner peripheral side of the amorphous wound core 1 . Using this force, the insulating portions 2a1, 2a2 and 2a3 of the core supporting member and the metal portion 2b of the core supporting member are pressed by the amorphous wound core 1, and the insulating portions 2a1, 2a2 and 2a3 of the core supporting member are pressed. and the metal portion 2b of the core support member can be fixed more firmly.

In addition, in the iron core support member of Patent Document 1, the support fitting is also formed along the curvature of the inner peripheral side of the amorphous wound iron core. .

On the other hand, the insulating portions 2a1, 2a2 and 2a3 of the core support member and the metal portion 2b of the core support member of the present embodiment reduce the curvature portion formed by the metal portion as much as possible, and the curvature portion is made of an insulator that is easy to process. , the man-hours and cost of the insulating portions 2a1, 2a2 and 2a3 of the core support member and the metal portion 2b of the core support member can be reduced.

Further, for example, the metal portion 2b of the core support member may be made of iron, but by using a non-magnetic material such as stainless steel or aluminum, it is possible to suppress the occurrence of stray loss.

Materials for the insulating portions 2a1, 2a2, and 2a3 of the core support member include, for example, wood, thermoplastic resins such as ABS resin and fluorine resin, and thermosetting resins such as epoxy resin and phenol resin.

Further, by double insulating portions 2a1, 2a2 and 2a3 of the core supporting member and using rubber as a cushioning material, it is possible to reduce vibration and noise caused by magnetostrictive vibration of the core.

In this embodiment, the amorphous magnetic ribbon is used as the magnetic ribbon, but a silicon steel plate, a nanocrystalline material, or the like may be used instead of the amorphous magnetic ribbon.

FIG. 3 shows an amorphous wound core 1 using an amorphous magnetic ribbon as the magnetic ribbon as Example 2 of the core for stationary induction electric machine of the present invention, and FIG. A state in which the insulating portion 2c and the metal portion 2d are separated is shown.

As shown in FIG. 3, the amorphous wound core 1 of this embodiment is supported by the insulating portion 2c and the metal portion 2d of the core supporting member.

In the amorphous wound core 1 of Example 1 shown in FIG. 1, the corner portion 1c on the inner peripheral side of the yoke portion 1a is formed, but in the present example shown in FIG. This shows an example in which the core support member 2 is applied when the radius of curvature of the curved portion of the corner portion is small and close to 90 degrees.

The core support member 2 supporting the amorphous wound core 1 of this embodiment shown in FIGS. The portion not covered is formed of the metal portion 2d of the core support member.

Specifically, as shown in FIG. 4, the core support member 2 of the present embodiment is arranged in the straight line portion of the yoke portion 1a of the amorphous wound core 1, and is a desktop platform-shaped core having legs at both ends of a flat plate. A flat plate of the insulating portion 2c of the desk pedestal-shaped core support member which is arranged in the linear portion of the yoke portion 1a of the amorphous wound core 1 via the insulating portion 2c of the support member and the insulating portion 2c of the desk pedestal-shaped core support member. It consists of a metal part 2d of a core support member which consists of a form-fitting part and has a through hole 3 at the top.

As shown in FIG. 3, the core support member 2 of the present embodiment configured in this way has an insulating portion 2c of the core support member in the form of a desktop table arranged in the straight line portion of the yoke portion 1a of the amorphous wound core 1. The amorphous wound core 1 is supported by matching the insulating portion 2c of the core supporting member with the flat plate shape of the insulating portion 2c of the core supporting member in the shape of a desk (core supporting member). The insulating portion 2c of the member and the metal portion 2d of the core support member are in surface contact).

As a result, the force generated by the amorphous wound core 1 toward the interior of the core window 5 can of course be received by the metal portion 2d of the core support member having high rigidity. Since the insulating portion 2c of the core support member is interposed therebetween, it is possible to avoid contact between the amorphous wound core 1 and the metal portion 2d of the core support member, resulting in an electrical short circuit.

In addition, since the insulating portion 2c of the core support member and the metal portion 2d of the core support member can ensure the rigidity for supporting the amorphous wound core 1, the structure is such that the function as the core support member can also be exhibited. there is

Furthermore, since a force is generated toward the inside of the core window 5 at the curvature portion on the inner peripheral side of the amorphous wound core 1, this force is used to fix the insulating portion 2c and the metal portion 2d of the core support member. It can be made stronger.

Further, for example, the metal portion 2d of the core support member may be made of iron, but by using a non-magnetic material such as stainless steel or aluminum, it is possible to suppress the occurrence of stray loss.

Materials for the insulating portion 2c of the core support member include, for example, wood, thermoplastic resins such as ABS resin and fluorine resin, and thermosetting resins such as epoxy resin and phenol resin.

Furthermore, by doubling the insulating portion 2c of the iron core supporting member and using rubber as a cushioning material, it is possible to reduce vibration and noise caused by magnetostrictive vibration of the iron core.

In this embodiment, the amorphous magnetic ribbon is used as the magnetic ribbon, but a silicon steel plate, a nanocrystalline material, or the like may be used instead of the amorphous magnetic ribbon.

FIG. 5 shows an amorphous wound core 1 that is a third embodiment of the wound core for stationary induction electric appliances of the present invention.

As shown in FIG. 5, in the amorphous wound core 1 of the present embodiment, the insulating portion 2a1 of the core support member is provided in advance in the straight portion of the yoke portion 1a of the amorphous wound core 1, and The insulating portions 2a2 and 2a3 of the core supporting member are attached to both corner portions 1c on the peripheral side, respectively, and the insulating portions 2a1, 2a2 and 2a3 of the core supporting member are respectively wrapped with the insulating tapes 4a, 4b and 4c to form the amorphous wound core 1. fixed to

Then, in the yoke portion 1a of the amorphous wound core 1 in such a state, the metal portion 2b of the core support member is attached to the straight portion of the yoke portion 1a in the same manner as the first embodiment shown in FIG. The insulating portion 2a1 of the core support member is interposed and supported (the insulating portion 2a1 of the core support member and the metal portion 2b of the core support member are in surface contact), and the corner portion 1c of the yoke portion 1a is provided with the insulating portion 2a2 of the core support member and the metal portion 2b of the core support member. 2a3 is interposed and supported.

As a result, the force generated by the amorphous wound core 1 toward the core window 5 can be received by the metal portion 2b of the core support member. Since the insulating portions 2a1, 2a2 and 2a3 of the core support member are interposed, it is possible to avoid contact between the amorphous wound core 1 and the metal portion 2b of the core support member, resulting in an electrical short circuit.

In addition, since the insulating portions 2a1, 2a2 and 2a3 and the metal portion 2b of the core support member can ensure the rigidity for supporting the amorphous wound core 1, the core support member 2 can function as well. ing.

The core support member 2 of the first embodiment shown in FIGS. 1 and 2 is an integrated body in which the metal portion 2b of the core support member and the insulating portions 2a1, 2a2 and 2a3 of the core support member are fixed with an adhesive or the like. However, in the core support member 2 of this embodiment, the metal portion 2b of the core support member and the insulating portions 2a1, 2a2, and 2a3 of the core support member are not fixed with an adhesive or the like and can be separated. , the insulating portion of the core support member is divided into three as indicated by reference numerals 2a1, 2a2 and 2a3 (the insulating portion of the core support member is not limited to three divisions and can be divided into a plurality of divisions), and gaps are formed between them. Therefore, even if there is a manufacturing error in the size of the yoke portion 1a, the gap between the divided insulating portions 2a1, 2a2 and 2a3 of the core support member can be used to adjust the size error. there is

The insulating tapes 4a, 4b, and 4c in this embodiment are preferably polyester film tape, polyimide film tape, glass cloth tape, filament tape, or the like.

Materials for the insulating portions 2a1, 2a2, and 2a3 of the core support member include, for example, wood, thermoplastic resins such as ABS resin and fluorine resin, and thermosetting resins such as epoxy resin and phenol resin.

Further, by double insulating portions 2a1, 2a2 and 2a3 of the core supporting member and using rubber as a cushioning material, it is possible to reduce vibration and noise caused by magnetostrictive vibration of the core.

In this embodiment, the amorphous magnetic ribbon is used as the magnetic ribbon, but a silicon steel plate, a nanocrystalline material, or the like may be used instead of the amorphous magnetic ribbon.

FIG. 6 shows an amorphous wound core 1 using an amorphous magnetic ribbon as a magnetic ribbon as Example 4 of the core for a static induction electric machine of the present invention.

The amorphous wound core 1 of this embodiment is supported by the divided insulating portions 2c1 and 2c2 of the core support member and the metal portion 2d of the core support member. This shows an example in which the core support member 2 is applied when the curvature radius of the curved portion of the corner portion (curved portion) on the peripheral side is small and close to 90 degrees.

As shown in FIG. 6, in the amorphous wound core 1 of the present embodiment, the insulating portions 2c1 and 2c2 of the divided core support member are attached in advance to the linear portion of the yoke portion 1a of the amorphous wound core 1 with a space therebetween. , the insulating portions 2c1 and 2c2 of the split core support member are attached to the straight portion of the yoke portion 1a with the insulating tape 4d, and the curved portions of the corner portions (substantially 90 degree portions) of the yoke portion 1a are attached with the insulating tapes 4e and 4f. is fixed to the amorphous wound core 1 (yoke portion 1a) at the portion where the radius of curvature is small.

Then, in the yoke portion 1a of the amorphous wound core 1 in such a state, the metal portion 2d of the core support member is used as in the second embodiment shown in FIG. It is supported through the insulating portions 2c1 and 2c2 of the support member (the divided insulating portions 2c1 and 2c2 of the core support member and the metal portion 2d of the core support member are in surface contact).

As a result, the force generated by the amorphous wound core 1 toward the core window 5 can be received by the metal portion 2d of the core support member. Since the insulating portions 2c1 and 2c2 of the core support member are interposed, it is possible to avoid contact between the amorphous wound core 1 and the metal portion 2d of the core support member, resulting in an electrical short circuit.

In addition, since the insulating portions 2c1 and 2c2 and the metal portion 2d of the core support member can ensure the rigidity for supporting the amorphous wound core 1, the core support member 2 is configured to function as well. .

Further, the core support member 2 of the second embodiment shown in FIGS. 3 and 4 is an integrated body in which the metal portion 2d of the core support member and the insulating portions 2c1 and 2c2 of the core support member are fixed with an adhesive or the like. However, in the core support member 2 of this embodiment, the metal portion 2d of the core support member and the insulating portions 2c1 and 2c2 of the core support member are not fixed with an adhesive or the like, and can be separated. As shown, the insulating portion is divided into two as indicated by reference numerals 2c1 and 2c2, so even if there is a manufacturing error in the dimensions of the yoke portion 1a, the two divided insulating portions 2c1 and 2c2 Manufacturing tolerances can be adjusted.

Furthermore, by designing the metal portion 2d of the core support member to be slightly smaller in size than the yoke portion 2a, the force generated by the amorphous wound core 1 toward the core window 5 can be absorbed by the metal portion 2d of the core support member. It is configured to accept.

That is, if the metal portion 2d of the core support member is designed to be slightly smaller in dimension than the yoke portion 1a, a slight gap is formed between the metal portion 2d and the amorphous wound core 1, and this gap can alleviate manufacturing errors. The metal portion 2d of the core supporting member can receive the force generated by the amorphous wound core 1 toward the core window 5. As shown in FIG.

Further, for example, the metal portion 2d of the core support member may be made of iron, but by using a non-magnetic material such as stainless steel or aluminum, it is possible to suppress the occurrence of stray loss.

Materials for the insulating portions 2c1 and 2c2 of the core support member include, for example, wood, thermoplastic resins such as ABS resin and fluorine resin, and thermosetting resins such as epoxy resin and phenol resin.

Further, by double insulating portions 2c1 and 2c2 of the iron core supporting member and using rubber as a cushioning material, it is possible to reduce vibration and noise caused by magnetostrictive vibration of the iron core.

In this embodiment, the amorphous magnetic ribbon is used as the magnetic ribbon, but a silicon steel plate, a nanocrystalline material, or the like may be used instead of the amorphous magnetic ribbon.

Moreover, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. In addition, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

DESCRIPTION OF SYMBOLS 1... Amorphous wound iron core 1a... Yoke part 1b... Core main leg 1c... Corner part of yoke part 2... Core supporting member 2a1, 2a2, 2a3, 2c... Insulating part of core supporting member 2c1, 2c2... Insulating portions of divided core supporting members 2b, 2d Metal portion of core supporting member 3 Through holes 4a, 4b, 4c, 4d, 4e, 4f Insulating tape 5 Core window.

Claims (12)

An iron core for a stationary induction electric machine in which a wound iron core configured by laminating a plurality of magnetic ribbons is supported by an iron core supporting member,
The wound core has a yoke portion joined to a core main leg into which a winding is inserted to form a ring shape to form a closed magnetic circuit,
The core support member includes a first insulating portion of the core support member arranged in the straight portion of the yoke portion, and a core support member installed at both corner portions (curved portions) on the inner peripheral side of the yoke portion. second and third insulating portions; and a metal portion of the core supporting member supporting the yoke portion of the wound core via the first, second and third insulating portions of the core supporting member. An iron core for a stationary induction electric machine characterized by: The iron core for a stationary induction electric appliance according to claim 1 ,
In the wound core, a first insulating portion of the core supporting member is provided in a straight portion of the yoke portion in advance, and second and third insulating portions of the core supporting member are provided in both inner peripheral corner portions of the yoke portion. Each of the first, second, and third insulating portions of the core support member is secured to the yoke portion with insulating tape, and the metal portion of the core support member secures the yoke portion to the yoke portion. A first insulating portion of the core support member is interposed and supported in the straight portion, and second and third insulating portions of the core support member are interposed and supported in the corner portions of the yoke portion. An iron core for a stationary induction electric machine, characterized by: The iron core for a static induction electric appliance according to claim 1 or 2 ,
The first insulating portion of the core support member is formed in the shape of a tabletop with legs attached to both ends of a flat plate, and the second and third insulating portions of the core support member are linear portions and arcs extending from both ends thereof. The cross section consisting of the part is formed in a substantially half-moon shape,
The metal portion of the core support member is arranged in the linear portion of the yoke portion via the first insulating portion of the desk-top-shaped core support member, An iron core for a stationary induction electric appliance, characterized in that a portion that matches the flat plate shape of the insulating portion and a portion that matches the linear portions of the second and third insulating portions of the core support member having a substantially half-moon cross section are formed. . The iron core for a stationary induction electric appliance according to claim 3 ,
A stationary induction electric appliance, characterized in that the circular arc portions of the second and third insulating portions of the core support member having a substantially half-moon cross section are arranged to match the corner portions (curved portions) of the yoke portion. iron core. The iron core for a stationary induction electric appliance according to claim 3 or 4 ,
An iron core for a stationary induction electric machine, wherein the first insulating portion of the iron core supporting member and the metal portion of the iron core supporting member are in surface contact with each other. The iron core for a stationary induction electric machine according to any one of claims 1 to 5 ,
An iron core for a static induction electric machine, wherein the metal portion of the iron core supporting member is made of a non-magnetic material. The iron core for a stationary induction electric machine according to any one of claims 1 to 6 ,
An iron core for a static induction electric appliance, wherein said first, second and third insulating portions are made of any one of wood, thermoplastic resin and thermosetting resin. An iron core for a stationary induction electric machine in which a wound iron core configured by laminating a plurality of magnetic ribbons is supported by an iron core supporting member,
The wound core is formed in a ring shape by joining a yoke portion to a core main leg into which windings are inserted to form a closed magnetic circuit, and a corner portion on the inner peripheral side of the yoke portion is at approximately 90 degrees. is formed,
The core support member supports the yoke portion of the wound core through the insulating portions of the divided core supporting members arranged in the straight portions of the yoke portion and the insulating portions of the divided core supporting members. a metal portion of the core support member ;
The wound core is attached with an insulating portion of the core support member that has been divided into straight portions of the yoke portion in advance, and the divided insulating portion of the core support member is fixed to the straight portion of the yoke portion with an insulating tape. Each of the divided insulating portions of the core support member is fixed to a corner portion (approximately 90-degree portion) of the yoke portion with another insulating tape, and the metal portion of the core support member The straight portion of the yoke portion is supported by interposing the insulating portion of the divided core support member,
The divided insulating portions of the core support member are formed into a tabletop shape with legs attached to both ends of a flat plate and arranged at intervals,
An iron core for a stationary induction electric machine, wherein the metal portion of the iron core support member is arranged in the linear portion of the yoke portion via an insulating portion of the divided iron core support member. The iron core for a stationary induction electric machine according to claim 8 ,
An iron core for a stationary induction electric machine, wherein an insulating portion of the divided iron core supporting member and a metal portion of the iron core supporting member are in surface contact with each other. The iron core for a stationary induction electric appliance according to claim 8 or 9 ,
An iron core for a static induction electric machine, wherein the metal portion of the iron core supporting member is made of a non-magnetic material. The iron core for a stationary induction electric machine according to any one of claims 8 to 10 ,
An iron core for a stationary induction electric machine, wherein the divided insulating portions are made of any one of wood, thermoplastic resin, and thermosetting resin. The iron core for a stationary induction electric machine according to any one of claims 1 to 11 ,
An iron core for a static induction electric machine, wherein the magnetic ribbon is made of any one of an amorphous magnetic ribbon, a silicon steel plate, and a nanocrystalline material.

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