JP2021141218A - Amorphous wound iron core for static induction electric device, and static induction electric device - Google Patents

Abstract

To provide an amorphous wound iron core for static induction electric device capable of suppressing reduction of local amorphous wound iron core cross-sectional area of the joint with stable joint dimensions by suppressing deflection and kinking that occur in the amorphous band by subdividing the layer of the amorphous band in the process of laminating and winding the amorphous wound iron core.SOLUTION: A disclosed amorphous wound iron core for static induction electric device is formed using an amorphous band of a predetermined length as a unit and joining both ends of the amorphous band, and the amorphous band is wound and laminated. Between the amorphous band and the amorphous band, a magnetic material (preferably a silicon steel plate) is inserted.SELECTED DRAWING: Figure 3

Description

The present invention relates to an amorphous wound iron core for a static induction electric device and a static induction electric device.

For example, there are no load loss and load loss in the loss due to the transformer which is one of the static induction electric appliances. Mainly, the no-load loss generated from the iron core installed in the transformer always occurs regardless of the load factor. Therefore, various measures have been studied in order to reduce the no-load loss.

As one of the measures, there is a measure to reduce the no-load loss by using the material of the iron core. In particular, a transformer using an amorphous magnetic metal for an iron core (hereinafter referred to as an "amorphous transformer") having a small magnetic loss and excellent magnetic characteristics has been developed as an energy-saving transformer.

Amorphous magnetic metal has a magnetic loss per unit weight of about 1/3 that of silicon steel sheet as compared with silicon steel sheet. Therefore, the amorphous transformer can reduce the no-load loss as compared with the transformer using the silicon steel plate for the iron core.

The iron core used for an amorphous transformer is an amorphous wound iron core using an amorphous magnetic metal. The amorphous wound iron core is formed by laminating and winding tens of thousands of strip-shaped amorphous magnetic metals (hereinafter referred to as "amorphous bands") having a thickness of several tens of μm per sheet. The amorphous band is formed by laminating several amorphous magnetic metals (hereinafter referred to as "amorphous thin") having a thickness of several tens of μm per sheet and cutting them into a band shape.

The amorphous wound iron core is formed by joining both ends of the amorphous band of a predetermined length as one unit. The method of joining the amorphous band includes wrap joining and butt joining, and the quality of this joining affects the characteristics of the amorphous wound iron core.

As a background technique in this technical field, there is Japanese Patent Application Laid-Open No. 59-175110 (Patent Document 1). Patent Document 1 describes a static induction electric device in which a winding is mounted on a wound core, and the wound core is formed by winding a plurality of magnetic materials cut to a predetermined length, and at least two of them are formed. It is formed from blocks of the joining method, and these blocks are butt-joined with magnetic materials of a predetermined length as one unit, and each unit is formed by step wrap joining in which the butt-joining portions are sequentially displaced. It is described that a magnetic material having a length is used as one unit, and each unit is formed by combining a joint portion formed by overlapping joints and a joint portion (see "Overview of the Invention").

Japanese Unexamined Patent Publication No. 59-175110

Patent Document 1 describes a wound iron core formed by butt-joining magnetic materials having a predetermined length as one unit, and the butt-joining portions are sequentially displaced in each unit.

However, Patent Document 1 describes the problem that the dimensions of the joint portion are not stable due to the occurrence of bending and twisting in the amorphous band in the process of laminating and winding the amorphous wound iron core, and the dimensions of the joint portion. The problem that the instability may cause a local decrease in the cross-sectional area of the amorphous wound core at the joint is not described.

Therefore, in the present invention, in the process of forming the amorphous wound iron core by laminating and winding, the occurrence of bending and twisting in the amorphous band is suppressed by subdividing the layer of the amorphous band, and the size of the joint is stable. Further, the present invention provides an amorphous wound core for a static induction electric device and a static induction electric device for suppressing a decrease in the cross-sectional area of a local amorphous wound core at a joint.

In order to solve the above-mentioned problems, the amorphous wound steel core for static induction electric appliances of the present invention is formed by joining both ends of the amorphous band and laminating and winding the amorphous band with the amorphous band of a predetermined length as one unit, and is amorphous. A magnetic material (preferably a silicon steel plate) is inserted between the layers between the band and the amorphous band.

Further, the static induction electric device of the present invention is characterized by having such an amorphous wound iron core for a static induction electric device and a winding wound around the amorphous wound iron core.

According to the present invention, in the process of forming the amorphous wound iron core by laminating and winding, the occurrence of bending and twisting in the amorphous band is suppressed by subdividing the layer of the amorphous band, and the size of the joint is stable. Further, it is possible to provide an amorphous wound core for a static induction electric device and a static induction electric device that suppress a decrease in the cross-sectional area of the local amorphous winding iron core of the joint portion.

Issues, configurations, and effects other than those described above will be clarified by the explanation of the examples below.

It is sectional drawing explaining the schematic structure of the static induction electric appliance which has an amorphous wound iron core 1 and winding 2 described in this Example. It is a conceptual diagram explaining the schematic structure of the amorphous wound iron core 1 described in this Example. FIG. 5 is a cross-sectional view illustrating a partially enlarged configuration of the lap-bonded amorphous wound iron core 1 described in the first embodiment. FIG. 5 is a cross-sectional view illustrating a partially enlarged configuration of the butt-joined amorphous wound iron core 1 described in the second embodiment. FIG. 5 is a cross-sectional view illustrating a partially enlarged configuration of the lap-bonded amorphous wound iron core 1 described in the third embodiment. It is sectional drawing explaining the partially enlarged structure of the butt-joined amorphous wound iron core 1 described in Example 4. FIG.

Hereinafter, examples of the present invention will be described with reference to the drawings. The substantially same or similar configurations are designated by the same reference numerals, and when the explanations are duplicated, the explanations may be omitted.

First, a schematic configuration of a static induction electric appliance having an amorphous wound iron core 1 and a winding 2 described in this embodiment will be described.

FIG. 1 is a cross-sectional view illustrating a schematic configuration of a static induction electric appliance having an amorphous wound iron core 1 and a winding 2 described in this embodiment.

The static induction electric device described in this embodiment is, for example, a transformer or a reactor, and has an amorphous winding iron core 1 for a static induction electric device (hereinafter referred to as “amorphous winding iron core 1”) and a winding 2.

An amorphous magnetic metal is used for the amorphous wound iron core 1. The amorphous wound iron core 1 is formed by laminating and winding hundreds of amorphous bands, which are band-shaped amorphous magnetic metals having a thickness of several hundred μm per sheet. The amorphous band is formed by laminating several amorphous thin sheets, which are amorphous magnetic metals having a thickness of several tens of μm per sheet, and cutting them into a band shape.

Then, the amorphous wound iron core 1 is formed by joining both ends of the amorphous band of a predetermined length as one unit. Amorphous band joining methods include wrap joining and butt joining.

The winding 2 is a conductive electric wire, and is formed by being wound (mounted) on an amorphous wound iron core 1 formed of an amorphous band in a concentric or rectangular shape.

Next, a schematic configuration of the amorphous wound iron core 1 described in this embodiment will be described.

FIG. 2 is a conceptual diagram illustrating a schematic configuration of the amorphous wound iron core 1 described in this embodiment.

The amorphous wound iron core 1 described in this embodiment is formed by laminating and winding hundreds of amorphous bands, which are amorphous magnetic metals in the form of bands having a thickness of several hundred μm per band.

In this embodiment, for example, an amorphous thin band having a thickness of about 25 μm per sheet is used, and several sheets thereof are laminated and cut into a strip shape, and an amorphous band having a thickness of about 100 to 300 μm per sheet is used. To use.

The amorphous wound iron core 1 is formed by laminating and winding an amorphous band having a predetermined length as one unit. Both ends of this one unit amorphous band are joined by wrap joining or butt joining.

Here, one unit of amorphous band is one amorphous band, and both ends thereof are joined. Then, one unit of the amorphous band is laminated and wound in a rectangular shape from the inside to the outside, for example, in this embodiment, having a thickness of about 50 to 150 mm, and in the S portion (region where the joint portion is formed). , Both ends are joined to form an amorphous wound iron core 1.

When one unit of amorphous band is lap-bonded, both ends of one unit of amorphous band wrap (overlap and overlap) with a predetermined length to form a wrap portion, and one unit of amorphous band is formed. In the case of butt joining, both ends of one unit of amorphous band are butt-butted to form a gap.

Further, when the amorphous band is lap-bonded, a gap (gap) of a predetermined length serving as a joint is formed between the amorphous band and the other amorphous band, and when the amorphous band is butt-bonded, the amorphous band is formed. A gap (gap) of a predetermined length serving as a joint is formed between both ends.

The joint portion is a lap portion or a gap, and the region where the joint portion is formed is a region where the wrap portion or the gap is formed. The region where the joint is formed is about 1/3 to 1/4 of the circumference of the amorphous wound iron core 1.

Then, the amorphous wound iron core 1 is laminated and wound to form a closed magnetic path while shifting the lap portion and the gap so that the lap portion and the gap do not overlap.

Next, a partially enlarged configuration of the lap-bonded amorphous wound iron core 1 described in Example 1 will be described.

FIG. 3 is a cross-sectional view illustrating a partially enlarged configuration of the lap-bonded amorphous wound iron core 1 described in the first embodiment. Note that FIG. 3 is an enlarged view of the S portion of FIG. Further, the vertical direction (−Y axis direction) in FIG. 3 is the stacking direction of the amorphous band, the upper side is the inside of the amorphous wound core 1, and the lower side is the outside of the amorphous wound core 1. The amorphous band is laminated and wound from the inside to the outside.

In Example 1, the amorphous band is lap-bonded.

The amorphous band 11 is wrapped by the wrap portion 110, the amorphous band 12 is wrapped by the wrap portion 120, and the amorphous band 14 is wrapped by the wrap portion 140. Then, the silicon steel plate 3 is inserted (sandwiched) between the amorphous band 12 and the amorphous band 13 and the amorphous band 13 and the amorphous band 14. The amorphous band 13 is laminated via the silicon steel plate 3.

Further, a gap 111 is formed between the amorphous band 11 and the amorphous band 12, a gap 121 is formed between the amorphous band 12 and the amorphous band 13, and a gap 131 is formed between the amorphous band 13 and the amorphous band 14. It is formed.

In this way, the joint portion of the amorphous wound iron core 1 wraps both ends of the laminated amorphous band for a predetermined length to form one closed magnetic path. Then, a gap is formed between the amorphous band and the amorphous band, and this gap is formed so as to be displaced.

The amorphous wound steel core 1 described in Example 1 is formed by wrapping both ends of the amorphous band and laminating and winding the amorphous band with the amorphous band of a predetermined length as one unit, and is formed between the amorphous band and the amorphous band. A magnetic material (preferably a silicon steel plate 3) is inserted between the layers.

The static induction electric device described in the first embodiment has such an amorphous wound iron core 1 and a winding 2 wound around the amorphous wound iron core 1. That is, the static induction electric device described in the first embodiment is formed by joining both ends of the amorphous band and laminating and winding the amorphous band with the amorphous band of a predetermined length as one unit, and is formed between the amorphous band and the amorphous band. It has an amorphous wound iron core 1 into which a magnetic material (preferably a silicon steel plate 3) is inserted, and a winding 2 wound around the amorphous wound iron core 1 between the layers.

In this way, by inserting the silicon steel plate 3 between the layers of the amorphous band, the amorphous band layer is subdivided in the process of forming the amorphous wound iron core 1 by laminating and winding, so that the deflection generated in the amorphous band occurs. The occurrence of kinks can be suppressed.

That is, since the amorphous wound iron core 1 is formed by using tens of thousands of amorphous thin cores having a thickness of several tens of μm per sheet, the amorphous wound iron core 1 has low rigidity, and in the process of its formation, Deflection and kinking occur. According to the first embodiment, it is possible to suppress the occurrence of such bending and twisting and improve the rigidity of the amorphous wound iron core 1.

Further, according to the first embodiment, since the occurrence of such bending and twisting can be suppressed, the dimensions of the joint portion (the length of the wrap portion and the length of the gap) are stable, and the dimensions of the joint portion are easy. The amorphous wound iron core 1 can be formed while adjusting to.

Further, according to the first embodiment, it is possible to suppress a decrease in the cross-sectional area of the amorphous wound core 1 at the joint portion, and it is possible to suppress an increase in the local magnetic flux density and an increase in the exciting capacity of the amorphous wound core 1. It is possible to make the magnetic flux density and the exciting capacity almost uniform as a whole.

Further, according to the first embodiment, it is possible to suppress a local increase in the magnetic flux density and an increase in the exciting capacity of the amorphous wound iron core 1.

Further, since the silicon steel plate 3 has good thermal conductivity, the heat dissipation of the amorphous wound iron core 1 is improved. As a result, heat is less likely to be trapped inside the amorphous wound core 1, and a local temperature rise of the amorphous wound core 1 can be suppressed.

The silicon steel plate 3 is preferably thicker than the amorphous band. In Example 1, a silicon steel plate 3 having a thickness of about 300 μm is used. As a result, the dimensions of the joint portion are further stabilized, and a decrease in the cross-sectional area of the local amorphous wound iron core 1 of the joint portion can be suppressed.

Further, it is preferable that the silicon steel plate 3 is inserted between the layers of the amorphous band and in the region where the joint portion is formed. As a result, the layer of the amorphous band in the region where the joint is formed is further subdivided, so that the occurrence of bending and twisting in the amorphous band can be suppressed, and the rigidity of the amorphous wound iron core 1 can be improved. Can be done.

Further, the silicon steel plate 3 is preferably inserted between the layers of the second and subsequent amorphous bands from the inside. As a result, it is possible to further suppress the occurrence of deflection and kinking that occur in the amorphous band.

Further, in the amorphous wound iron core 1, the space factor of the amorphous band decreases on the outside with respect to the inside. Therefore, it is preferable that the silicon steel plate 3 is inserted between the layers of the outer amorphous band. As a result, the occupancy rate of the lowered amorphous wound iron core can be increased. Here, the inner side is above the central portion in the stacking direction of the amorphous bands, and the outer side is lower than the central portion in the stacking direction of the amorphous bands.

Further, when the silicon steel plate 3 is inserted into the region where the joint portion is formed, it is preferable that the periphery of the amorphous wound iron core 1 is fixed by binding or the like.

In Example 1, the silicon steel plate 3 is inserted between the layers of the amorphous band, but the present invention is not limited to the silicon steel plate 3, and another magnetic material, for example, the amorphous band may be inserted. When inserting an amorphous band, an amorphous band having a thickness of about 200 to 400 μm per band is used.

Next, a partially enlarged configuration of the butt-joined amorphous wound iron core 1 described in Example 2 will be described.

FIG. 4 is a cross-sectional view illustrating a partially enlarged configuration of the butt-joined amorphous wound iron core 1 described in the second embodiment. Note that FIG. 4 is an enlarged view of the S portion of FIG. Further, the vertical direction (−Y axis direction) in FIG. 4 is the stacking direction of the amorphous band, the upper side is the inside of the amorphous wound core 1, and the lower side is the outside of the amorphous wound core 1. The amorphous band is laminated and wound from the inside to the outside.

In Example 2, the method of joining the amorphous band is different from that in Example 1.

In Example 1, the amorphous bands are lap-bonded, but in Example 2, the amorphous bands are butt-bonded.

The amorphous band 11, the amorphous band 12, the amorphous band 13, and the amorphous band 14 amorphous band 15 are butt-joined, respectively. Then, the silicon steel plate 3 is inserted (sandwiched) between the layers between the amorphous band 13 and the amorphous band 14.

Further, a gap 111 is provided between both ends of the amorphous band 11, a gap 121 is provided between both ends of the amorphous band 12, a gap 131 is provided between both ends of the amorphous band 13, and a gap 141 is provided between both ends of the amorphous band 14. A gap 151 is formed between both ends of the amorphous band 15.

As described above, in the joint portion of the amorphous wound iron core 1, both ends of the amorphous band of one unit are butted, and the gap formed between both ends of the laminated amorphous band is displaced to form one closed magnetic path. do.

The amorphous wound steel core 1 described in the second embodiment is formed by butt-joining both ends of the amorphous band and laminating and winding the amorphous band with the amorphous band of a predetermined length as one unit, and is formed between the amorphous band and the amorphous band. A magnetic material (preferably a silicon steel plate 3) is inserted between the layers.

The static induction electric device described in the second embodiment has such an amorphous wound iron core 1 and a winding 2 wound around the amorphous wound iron core 1.

As described above, according to the second embodiment, in the process of forming the amorphous wound iron core 1 by laminating and winding, the occurrence of bending and twisting in the amorphous band is suppressed by subdividing the layer of the amorphous band. The dimensions of the joint are stable, and it is possible to suppress a decrease in the cross-sectional area of the local amorphous wound iron core of the joint.

Further, according to the second embodiment, the amorphous wound iron core 1 can be formed while further adjusting the dimensions of the joint portion easily.

Next, a partially enlarged configuration of the lap-bonded amorphous wound iron core 1 described in Example 3 will be described.

FIG. 5 is a cross-sectional view illustrating a partially enlarged configuration of the lap-bonded amorphous wound iron core 1 described in the third embodiment.

In Example 3, the number of silicon steel plates 3 inserted between the amorphous band 12 and the amorphous band 13 and the amorphous band 13 and the amorphous band 14 is different from that in the first embodiment.

That is, the number of silicon steel plates 3 inserted between the amorphous band 12 and the amorphous band 13 and the amorphous band 13 and the amorphous band 14 is one in the first embodiment, but a plurality in the third embodiment. Sheets, for example, 20 to 30 sheets.

As a result, the dimensions of the joint can be easily adjusted even for the large amorphous wound iron core 1.

When the plurality of silicon steel plates 3 are inserted between the layers of the amorphous band, at least one end of the plurality of silicon steel plates 3 may be fixed with an insulating material such as insulating paper or resin.

Further, in Example 3, a plurality of silicon steel plates 3 are inserted between the layers of the amorphous band, but the present invention is not limited to the silicon steel plate 3, and another magnetic material, for example, a plurality of amorphous bands is inserted. You may.

In particular, when a plurality of amorphous bands are inserted between the layers of the amorphous bands, the amorphous bands have lower rigidity than the silicon steel plate 3, so that both ends of the plurality of amorphous bands are made of insulating paper, resin, or the like. It is preferable to fix it with the insulating material of.

Next, a partially enlarged configuration of the butt-joined amorphous wound iron core 1 described in Example 4 will be described.

FIG. 6 is a cross-sectional view illustrating a partially enlarged configuration of the butt-joined amorphous wound iron core 1 described in the fourth embodiment.

In Example 4, the number of silicon steel plates 3 inserted between the amorphous band 13 and the amorphous band 14 is different from that in Example 2.

That is, the number of silicon steel plates 3 inserted between the layers between the amorphous band 13 and the amorphous band 14 is one in Example 2, but in Example 4, a plurality of silicon steel plates 3, for example, 20 to 30 sheets. Is.

As a result, the dimensions of the joint can be easily adjusted even for the large amorphous wound iron core 1.

When the plurality of silicon steel plates 3 are inserted between the layers of the amorphous band, at least one end of the plurality of silicon steel plates 3 may be fixed with an insulating material such as insulating paper or resin.

Further, in the fourth embodiment, a plurality of silicon steel plates 3 are inserted between the layers of the amorphous band, but the present invention is not limited to the silicon steel plate 3, and another magnetic material, for example, a plurality of amorphous bands is inserted. You may.

In particular, when a plurality of amorphous bands are inserted between the layers of the amorphous bands, the amorphous bands have lower rigidity than the silicon steel plate 3, so that both ends of the plurality of amorphous bands are made of insulating paper, resin, or the like. It is preferable to fix it with the insulating material of.

The present invention is not limited to the above-described examples, and includes various modifications. For example, the above-described embodiment has been specifically described in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the described configurations.

It is also possible to replace a part of the configuration of one embodiment with a part of the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to delete a part of the configuration of each embodiment, add a part of the other configuration, and replace it with a part of the other configuration.

1 ... Amorphous wound iron core 2 ... Winding 3 ... Silicon steel plate 11, 12, 13, 14, 15 ... Amorphous band 110, 120, 140 ... Wrap portion 111, 121, 131, 141 , 151 ... Gap

Claims (8)

With an amorphous band of a predetermined length as one unit, both ends of the amorphous band are joined, and the amorphous band is laminated and wound to form.
An amorphous wound iron core for a static induction electric machine, characterized in that a magnetic material is inserted between the amorphous band and the amorphous band. The amorphous wound iron core for a static induction electric device according to claim 1.
An amorphous wound iron core for a static induction electric machine, wherein the magnetic material is a silicon steel plate. The amorphous wound iron core for a static induction electric device according to claim 2.
An amorphous wound iron core for a static induction electric machine, wherein the joint is a wrap joint or a butt joint. The amorphous wound iron core for a static induction electric device according to claim 3.
An amorphous wound iron core for a static induction electric device, characterized in that the number of the silicon steel sheets is a plurality of sheets. The amorphous wound iron core for a static induction electric device according to claim 2.
The silicon steel plate is an amorphous wound iron core for a static induction electric device, which is thicker than the amorphous band. The amorphous wound iron core for a static induction electric device according to claim 2.
An amorphous wound iron core for a static induction electric device, wherein the silicon steel plate is inserted between layers of the amorphous band and in a region where a joint is formed. The amorphous wound iron core for a static induction electric device according to claim 2.
The silicon steel sheet is an amorphous wound iron core for a static induction electric appliance, which is inserted between layers of the amorphous band after the second layer from the inside. A static induction electric device having an amorphous wound core for a static induction electric device according to claim 2 and a winding wound around the amorphous winding iron core for a static induction electric device.

Images