JPH10340816A - Amorphous rolled core transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an amorphous wound iron core transformer having an amorphous wound iron core in which an amorphous thin ribbon is wound in multiple layers and a coil, even if an excessive current such as a fault current flows through the coil, an inner winding. Protects the amorphous wound iron core from deformation due to buckling of the wire, and prevents stress from being applied. SOLUTION: A silicon steel core member 12 made of silicon steel is provided in an amorphous core material width direction in an amorphous core 1 made of an amorphous core member 11. A silicon steel wound core member 12 in which a magnetic ribbon is wound in multiple layers or a silicon steel laminated core member 12 in which magnetic steel plates are stacked in multiple layers are used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an amorphous wound iron core transformer, and more particularly to an amorphous wound iron core transformer having an amorphous wound iron core and a coil.

[0002]

2. Description of the Related Art A transformer is a device for converting high-voltage / small-current AC power into low-voltage / high-current AC power and vice versa, and comprises an iron core constituting a magnetic circuit and an electric circuit. And a coil to be used. It is known to use an amorphous magnetic material in addition to a silicon steel plate as a material of the iron core, and as a structure of the iron core, a wound iron core formed by winding an iron core material in addition to a laminated iron core is known.

[0003] Conventionally, an amorphous wound iron core transformer using an amorphous magnetic material as a material of the iron core and a wound iron core as the structure of the iron core has been known as shown in FIGS. A conventional amorphous wound iron core transformer shown in FIGS. 3 and 4 will be described. FIG. 3 is a sectional view taken along line AA ′ in FIG.
FIG. A conventional amorphous wound iron core transformer includes an amorphous wound iron core 1 'and a coil 2'. The amorphous wound core 1 ′ is formed by winding an amorphous magnetic ribbon in multiple layers, and the coil 2 ′ includes an outer winding 21 ′, an inner winding 22 ′, and a main insulation 23.
′ Is concentrically wound. A coil winding 24 'is provided at the innermost shell of the inner winding 22', and a spacer 3 'is inserted between the amorphous winding core 1' and the coil winding 24 'to make the winding core 1' self-supporting. Have been. The spacer 3 ′ is used to prevent the force of the amorphous core 1 ′ from being applied to the amorphous core 1 ′ because the core characteristic of the core 1 ′ is sensitive to stress. The thickness of the spacer 3 'was the same as the gap between the coil winding frame 24' and the amorphous core 1 ', and the coil frame 24' and the amorphous core 1 'could not be firmly fixed. .

[0004] The conventional amorphous wound iron core 1 'has been mainly applied to small capacity transformers. When applied to a large-capacity transformer, a structure in which a plurality of amorphous wound iron cores 1 'are arranged in the width direction of the iron core material as shown in FIG. In the case of such a structure, the side in the iron core material width direction of the coil winding frame 24 ′ becomes long, so that the structure is weak against a force orthogonal to this side. When an excessive current such as an accident current flows through the coil 2 'in such a structure, an electromagnetic mechanical force is generated in the coil 2' as shown in FIG. A repulsive force acts in the radial direction between ′. As a result, the inner winding 22 'moves to the winding core 1' side, and the outer winding 21 moves to the opposite side to the former.
The inner winding 22 'pushes out the coil bobbin 24' and applies stress to the wound core 1 'via the spacer 3'. Since the silicon steel core has a high space factor, the core thickness does not change and the buckling of the inner winding 22 ′ can be suppressed, while the amorphous core has a low space factor and the core thickness changes. However, buckling of the inner winding 22 'could not be suppressed, and excessive stress was applied to the iron core 1', resulting in iron loss and deterioration of the exciting current.

[0005]

SUMMARY OF THE INVENTION According to the present invention, the provision of a silicon steel core member on an amorphous wound iron core allows buckling of the inner winding of the coil even when an excessive current such as an accidental current flows through the coil. It is an object of the present invention to provide an amorphous wound iron core transformer having a structure in which a wound iron core is protected from deformation due to the above, and a stress is not applied to the amorphous wound iron core.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an amorphous wound iron core transformer comprising an amorphous wound iron core in which an amorphous magnetic ribbon is wound in multiple layers, and a coil, wherein the amorphous wound iron core is made of silicon steel. This is an amorphous wound core transformer having a silicon steel core member in the width direction of the core material.

Further, the present invention is the amorphous steel core transformer, wherein the silicon steel core member is a silicon steel core member obtained by winding a magnetic ribbon in multiple layers.

Further, the present invention is the amorphous wound iron core transformer, wherein the silicon steel core member is a silicon steel laminated core member in which magnetic steel sheets are laminated in multiple layers.

Further, the present invention is the amorphous wound iron core transformer, wherein the coil has a coil winding frame in an innermost shell.

[0010]

The amorphous wound iron core transformer of the present invention uses a silicon steel core member made of silicon steel in the width direction of the amorphous iron core material as the amorphous wound iron core, so that it has strength against buckling of the coil. It can reduce the stress acting on the amorphous core,
The adverse effect on the magnetic properties of the amorphous wound iron core can be reduced. If a silicon steel wound core member or an E-shaped laminated core member is used, an amorphous wound core having excellent magnetic properties can be obtained.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described. One embodiment of the amorphous wound iron core transformer of the present invention will be described. FIG. 1 shows a single-phase amorphous wound iron core transformer which is a first embodiment of the amorphous wound iron core transformer of the present invention. The amorphous wound iron core transformer according to the present embodiment includes an amorphous wound iron core 1 and a coil 2. The amorphous wound iron core 1 has two wound iron core members 11 formed by winding an amorphous magnetic thin ribbon in multiple layers, and two silicon steel magnetic thin strips sandwiched between the wound iron core members in a multi-layered manner. A total of three steel-wound iron core members 12 are arranged and inserted. The silicon steel wound core member 12 is inserted into a place where the coil 2 is easily buckled. The magnetic material constituting each of the wound core members 11 and 12 is cut into a prescribed size, wrapped after being inserted into the coil 2. On the other hand, the coil 2 has an outer winding 21,
It has an inner winding 22, a main insulation 23, and a coil winding frame 24.
The main insulation 23 is a member that maintains insulation between the outer winding 21 and the inner winding 22. The coil winding frame 24 is made of a steel plate having a low magnetic permeability, and is provided on the innermost shell of the coil 2. The coil winding frame 24 may be one obtained by cutting a steel plate and a part thereof and connecting them by an insulating member. This insulating member is provided to prevent current from flowing through the conductive coil winding 24 for one turn. Between the amorphous core 1 and the coil 2,
The spacer 3 is inserted.

If the position where the silicon steel wound core member 12 is provided on the amorphous wound core 1 is a place where the coil 2 is easily buckled, the amorphous wound core 1 has high strength against the force acting by buckling. In addition, adverse effects on the magnetic characteristics of the amorphous wound iron core 1 can be reduced. In addition,
As a substitute for the silicon steel core member 12 inserted into the amorphous core 1, for example, a silicon steel laminated core member in which an E-shaped silicon steel sheet is multilayered can be used.
At that time, since the laminating direction is orthogonal to the direction of the force acting upon the buckling of the coil 2, the strength against the acting force can be further increased. It is also possible to adjust the spacing and magnetic properties. The same applies to the three-phase amorphous core transformer.

Next, a description will be given of a second embodiment of the amorphous wound iron core transformer according to the present invention. FIG. 2 shows a single-phase amorphous wound iron core transformer according to the present embodiment. The amorphous wound iron core transformer of the present embodiment is different from the amorphous wound iron core transformer of the first embodiment in the structure of the amorphous wound iron core 1. In the amorphous wound iron core 1 of the present embodiment, three amorphous wound iron core members 11 are arranged in the width direction of the iron core material, and two silicon steel wound iron core members 12 are interposed between the amorphous wound iron core members 11, and a total of five are inserted. It was done. The place where the silicon steel wound core member 12 is inserted into the amorphous wound core 1 is preferably a place where the coil 2 is easily buckled. The strength of the amorphous wound iron core 1 is increased with respect to the force exerted by buckling, and the adverse effect on the magnetic characteristics of the amorphous wound iron core 1 can be reduced. It should be noted that, for example, an E-shaped laminated silicon steel laminated core member can be used instead of the silicon steel wound core member 12 in the first embodiment.
This is the same as the embodiment. Further, in this embodiment, an example of a single-phase amorphous wound iron core has been described, but the same configuration can be applied to a three-phase amorphous wound iron core.

[0014]

According to the present invention, by inserting an iron core member such as a silicon steel wound iron core member into an amorphous wound iron core of an amorphous wound iron core transformer, an excessive current such as an accident current flows through the coil. Even if the wire of the inner winding buckles, the core material can suppress deformation and prevent stress from being applied to the amorphous core, making it possible to manufacture an amorphous core transformer that does not deteriorate iron loss and exciting current. it can.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of the contents of an amorphous wound iron core transformer according to the present invention.

FIG. 2 is an explanatory diagram showing an example of the content configuration of an amorphous wound iron core transformer according to the present invention.

FIG. 3 is an explanatory view showing the structure of a conventional amorphous wound iron core transformer.

FIG. 4 is an explanatory sectional view taken along the line AA ′ of FIG. 3 showing the internal structure of a conventional amorphous wound iron core transformer;

FIG. 5 is an explanatory view showing the structure of a conventional amorphous wound iron core transformer.

FIG. 6 is an explanatory view of buckling in a winding of a conventional amorphous wound iron core transformer.

[Explanation of symbols]

 Reference Signs List 1 amorphous wound iron core 11 amorphous wound iron core member 12 silicon steel wound iron core member 2 coil 21 outer winding 22 inner winding 23 main insulation 24 coil winding frame 3 spacer

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takayuki Yamazaki 46-1, Tomioka, Nakajocho, Kitakanbara-gun, Niigata Prefecture 1 Industrial Machinery Division, Hitachi, Ltd.

Claims (4)

[Claims] 1. An amorphous wound iron core transformer comprising an amorphous wound iron core obtained by winding an amorphous magnetic thin ribbon in a multilayer manner and a coil, wherein the amorphous wound iron core comprises a silicon steel core member made of a silicon steel material. An amorphous wound iron core transformer characterized by having in the material width direction. 2. The amorphous wound core transformer according to claim 1, wherein the silicon steel core member is a silicon steel wound core member obtained by winding a magnetic ribbon in multiple layers. vessel. 3. The amorphous wound core transformer according to claim 1, wherein the silicon steel core member is a silicon steel laminated core member in which magnetic steel plates are laminated in multiple layers. 4. The amorphous wound iron core transformer according to claim 1, wherein the coil has a coil winding frame in an innermost shell. vessel.