JPH0795486B2 - Amorphous winding iron core - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wound iron core using an amorphous band-shaped magnetic material.

[Conventional technology]

Amorphous magnetic material known as low loss magnetic material,
Since it is obtained as an extremely thin strip material having a thickness of 30 μm or less, when it is used as an iron core material of a transformer, as shown in FIG. 2, the amorphous strip magnetic material 2 drawn from the drum 1 is wound around a winding form 4. Therefore, it is generally used as a circular or square wound iron core 3.

A conventionally known amorphous winding iron core is disclosed in Japanese Patent Laid-Open No. 59-27.
As shown on behalf of the 511 public information, in order to increase the space factor of the iron core, a step with inscribed in a circle or an ellipse by combining several steps of iron core blocks made of amorphous strip-shaped magnetic materials with different widths Was formed in a cross-sectional shape. FIG. 3 (a) is an outline view of the amorphous winding iron core manufactured in this way, and FIG. 3 (b) is a sectional view taken along the line AA, showing the reel 4
First, from the proximity side to (Fig. 2), an amorphous strip-shaped magnetic material having a width W ₃ is laminated and wound so as to have a laminated thickness t _5, and then W ₂ , t
₄ , ₅ , W ₁ , t ₃ , W ₂ , t ₂ , W ₃ , t ₁ are laminated in this order and wound to form a cross section having five steps of core blocks 35, 34, 33, 32, 31.
In addition, also in the iron core cross-sectional views of FIGS. 1 and 4 (a) and (b) showing an embodiment of the present invention described later, the lower side of the drawing indicates the reel 4 side.

[Problems to be solved by the invention]

Amorphous band-shaped magnetic material is produced by stretching the material of the dissolved characteristic component by the single-roll or double-roll quenching method, so that a wide magnetic material such as a silicon steel plate, which is a conventional magnetic material, can be obtained. However, when the structure as shown in FIG. 3B is used, the cross-sectional area of the iron core is limited by the width of the magnetic material, and it can be applied only to a transformer having a small capacity. To make a larger-sized wound core, as shown in FIG. 3 (c), a plurality of stages of core blocks constituting the wound core are 311, 312, 321, 322, ......, 351, 3
It is possible to divide into two at 52 and the center position 5 in the width direction. According to this configuration, the width W ₁ ′, W
₂ ′ and W ₃ ′ are the widths W ₁ and W of the iron core block in FIG. 3 (b).
_2, W ₃ of the can take up to twice, can be increased core cross-sectional area. Such a symmetrical iron core division method is disclosed in Japanese Patent Publication No.
-35931 gazette, it has been conventionally adopted for a large iron core using a silicon steel sheet, but when it is applied to an amorphous winding iron core, the left and right symmetrically divided iron core blocks of each stage are respectively Since it is in an independent state, it is difficult to hold the entire core in a predetermined shape, and the core block shifts left and right due to its own weight or external force during core manufacturing and subsequent winding assembly, and it is easy to deform. is there.

This is because the thickness of the amorphous strip-shaped magnetic material is as thin as approximately 30 μm or less, so that the iron core itself does not have sufficient mechanical strength to stand on its own. In addition, in the amorphous strip-shaped magnetic material produced by the single roll manufacturing method, This is due to the unique properties of the amorphous band-shaped magnetic material, such as the core block not having a uniform thickness because the thickness is not uniform and the thickness is uneven in one of the width directions. It becomes more remarkable as the stack thickness increases. FIG. 4 (a) is a model view showing a state where the iron core block is displaced when the amorphous strip magnetic material is actually wound in the iron core division method of FIG. 3 (c). FIG. 2B is a detailed view of the B part. The iron core block shift phenomenon will be described below with reference to FIG. 4 (b).

That is, when winding the amorphous strip magnetic member at a tension F, the portion not supported by the lower core block 352 of the core block 342 shown in FIG. 4 (b) is the tension F, as indicated by arrows f ₁ , Since it is bent in the direction of the center of the winding form, a force in the direction of the arrow f ₂ is applied to the iron core block 342, and when this force overcomes the frictional force between the amorphous strip-shaped magnetic materials, the iron core block 342 moves as shown by the solid line in the figure. It will be shifted in the f ₂ direction. According to the experience of the inventors, this shift phenomenon is shown in FIG. 4 (b) as W ₂ / W ₁ > 0.5, t / W ₂ > 1.
, It is easy to occur. Here, W ₁ is the division width of the iron core block, W ₂ is the width of the unsupported portion of the iron core block, and t is the product thickness of the iron core block. This shift phenomenon
It is also generated by the self-weight of the iron core or other external force, and since the amorphous band-shaped magnetic material is extremely thin and the magnetic characteristics are deteriorated by the mechanical internal strain, the once-developed shift cannot be repaired. The shaded area in FIG. 5 shows the numerical range of W ₂ / W ₁ and t / W ₂ at which this shift phenomenon does not occur. Under this constraint condition, the division as shown in FIG. It is difficult to construct a shape-shaped amorphous winding iron core.

An object of the present invention is that the mechanical connection of the core block is strong,
It is an object of the present invention to provide a split type amorphous winding iron core that does not cause the above-mentioned shift phenomenon.

[Means for solving problems]

The above-mentioned object is to combine a plurality of iron core blocks formed by winding an amorphous band-shaped magnetic material into a quasi-rectangular shape in the stacking direction, and divide at least two or more of the iron core blocks in the width direction. In addition, in the amorphous winding core configured such that the divided positions of the adjacent core blocks are changed to each other to have the stepped core cross section, the plurality of stages of the core block are composed of 5 stages.
A first one having a first block width and located in a central one of the steps
A stage, a pair of second stages adjacent to the first stage in the stacking direction and having a second block width smaller than the first stage, and a side opposite to the first stage with respect to the pair of second stages. Adjacent to the second stage and having a third block width smaller than the second stage, the first stage and the second stage are divided into a plurality of layers in the stacking direction, and the plurality of layers each have a different division width. Divided into two blocks,
The divided positions divided into two are arranged on two substantially parallel lines that are alternately separated for each layer, and of the core blocks of the layer adjacent to the third stage among the second-stage plural layers. The left and right blocks with the dividing position as a boundary are pressed by the third-stage iron core block, and the iron core blocks of the layers adjacent to the third stage are arranged in the block width direction from the end of the third-stage iron core block. It is achieved by an amorphous winding core characterized in that the protruding length and the thickness of the adjacent layer are substantially equal to each other.

[Action]

With the above-described configuration, in the iron core block configured by five stages of the present invention, the second and third stages except the third stage of the outermost layer are divided into a plurality of layers in the stacking direction, and each layer and each layer. The blocks of the steps are arranged so that the dividing positions do not overlap, and the blocks of other layers or steps close to the dividing positions are
Since the left and right iron core blocks are pressed down across this division position, the frictional force acting on this overlapping portion prevents each iron core block from mutually deviating from the left and right due to its own weight or external force, and It can be firmly held in a predetermined shape.

〔Example〕

This embodiment will be described below with reference to FIG. FIG. 1 is a sectional view showing an embodiment of the present invention. The amorphous winding iron core 3 of the present embodiment is composed of five-stage iron core blocks, and the first-stage iron core block having a width W ₁ ′ product thickness t ₃ is located in the central portion and has a width W ₂ ′ product thickness t 3. Width W ₃ ′ product thickness t ₁ , t _{3 on} both sides of the first-stage iron core block between the second-stage iron core blocks ₂ and t ₄
The third-stage core blocks are arranged on both outer sides of the second-stage core blocks, and the core cross section has a stepped shape inscribed in a circle. Of the core blocks of each stage, except for the third stage, that is, the uppermost and lowermost core blocks 3100, 3500, the second stage core block is a two-layer laminated block of 3211, 3221 and 3212, 3222, and , 3411,3421 and 3412,3422 form a two-layer laminated block, and the first-stage core block in the central portion is 3311,3321, 3312,3322, and 3313,3323.
In addition to forming a laminated block composed of layers, the division positions 7 of each stage of each layer are arranged alternately on each layer and arranged on two straight lines parallel to each other.
That is, which position or step of the core block division position 7
Also does not coincide with the division position 7 of the adjacent layer or step.

The present embodiment is an amorphous winding iron core using an amorphous strip-shaped magnetic material having a plate thickness of 25 ± 5 μ (nominal value), and the dimensions of each part (unit is mm) are L ₁ = 407, L ₂ = 541, T ＝ 116 W ₁ ＝＝ 100, W ₂ ＝＝ 75, W ₃ ＝＝ 50 t ₁ ＝ 7, t ₂ ＝ 13, t ₃ ＝ 76, t ₄ ＝ 13, t ₅ ＝ 7 It is designed to have a stepped shape inscribed in.

As a result, for example, the second-stage iron core small blocks 3211 and 3221 with the division position 7 as a boundary are separated from the third-stage iron core blocks 31.
Because it is configured to be pressed closer by 00,
Due to the frictional force acting on the overlapping portion, the iron core blocks are mutually restrained from being laterally displaced from each other due to their own weight or external force, so that the entire iron core can be firmly held in a predetermined shape.

According to this example, the constraint condition of W ₂ / W ₁ and t / W ₂ shown in FIG. 5 was relaxed, and it was proved that a large wound core using an amorphous strip magnetic material can be manufactured. Was done. After winding, the amorphous winding iron core is restrained and held in a predetermined shape by using a reinforcing material made of a rigid body. According to the present embodiment, since the winding iron core itself has high mechanical strength, the reinforcing material is also simple and lightweight. The cost can be reduced.

In the above embodiment, the iron core cross section has a stepped shape inscribed in a circle, but the present invention is also applicable to a stepped cross sectional shape inscribed in an ellipse or an ellipse.

〔The invention's effect〕

According to the present invention, since the division positions in the width direction of the adjacent iron core blocks do not overlap each other, the blocks of the divided iron cores of the adjacent steps tend to shift to the left or right due to their own weight or external force. The effect of suppressing the deviation of the core block is prevented, and as a result, the iron core is firmly held in the prescribed shape, so there are few dimensional restrictions to prevent the core block from slipping. It is possible to manufacture a large-sized wound iron core using a strip-shaped magnetic material.

[Brief description of drawings]

FIG. 1 is a sectional view of an iron core showing an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are explanatory views of a process of winding an amorphous band-shaped magnetic material to form a wound iron core, and FIG. 3 is a general shape. Is a diagram showing an amorphous winding iron core as shown in FIG.
(B) is a cross-sectional view of the non-divided wound iron core along the line AA, (c) is a cross-sectional view of a prior art Itakatsu-shaped wound iron core, and FIGS. 4 (a) and 4 (b) are amorphous strips. When the magnetic material is wound so as to form the split wire core of FIG. 3 (c),
FIG. 5 is a diagram schematically showing how the iron core block is displaced and a detailed view of its B portion, and FIG. 5 is a diagram showing dimensional constraint conditions in the conventional amorphous wound iron core. 2: Amorphous band-shaped magnetic material, 3: Amorphous winding iron core 311 to 352, 3100 to 3500: Iron core block, 5, 7: Dividing position

Claims (1)

[Claims] 1. An iron core block formed by winding an amorphous strip-shaped magnetic material in a quasi-short shape is combined in a plurality of stages in a stacking direction,
Of the core blocks, at least two or more stages of the core blocks are divided in the axial direction, and the division values of the adjacent core blocks are displaced from each other to have a stepped core cross section. In the amorphous winding iron core, the plurality of stages of the iron core block are composed of five stages, a first stage having a first block width located in a central stage of the five stages, and a first stage adjacent to the first stage in the stacking direction. Second smaller than first stage
A pair of second stages having a block width of, and a third stage having a third block width smaller than the second stage and adjacent to the pair of second stages on the opposite side of the first stage. The first stage and the second stage are divided into a plurality of layers in the stacking direction, and the plurality of layers are divided into core blocks having different division widths.
The divided positions are divided into two, and the divided positions are alternately arranged for each layer and are arranged on two substantially parallel straight lines. The left and right blocks with the division position of the iron core block as the boundary are
The core blocks of the layer that is pressed down by the stepped core blocks and is adjacent to the third step have a length that protrudes in the block width direction from the end of the third step core block and the thickness of the adjacent layer are substantially equal. An amorphous winding iron core characterized by being configured as follows.