JP7300366B2 - Stacked iron core applicable transformer and assembly method - Google Patents

Description

The present invention relates to stacked core transformers, and more particularly to nanocrystalline stacked core transformers.

In recent years, amorphous magnetic materials with low magnetic loss and excellent magnetic properties have been used as cores for energy-saving transformers. Amorphous ribbons used in transformer cores are manufactured by ultra-rapidly cooling molten magnetic alloys, and have very low magnetic loss and excellent magnetic properties. However, the amorphous ribbon that forms the iron core has the properties of being thin, hard, and brittle. For this reason, although thousands of strips with a thickness of about 0.025 mm are laminated, sufficient mechanical strength and rigidity cannot be obtained, and it is difficult to stand on its own like a silicon steel plate. It is also known that since amorphous magnetic materials have high stress sensitivity, the application of stress increases the magnetic loss.

On the other hand, in recent years, attention has been focused on nanocrystalline materials, which have excellent magnetic performance with magnetic loss less than half that of amorphous magnetic materials. A nanocrystalline material can be obtained by heat-treating an amorphous ribbon at a temperature higher than the crystallization temperature in a nitrogen or argon atmosphere to reduce the crystal grain size to about 10 nm. In addition, the nanocrystalline ribbon is extremely thin with a thickness of approximately 0.018 mm, and is more brittle than the amorphous ribbon. be.

Technology for providing a magnetic core piece and a magnetic core that dramatically improves the handling of an amorphous thin strip when manufacturing a laminated magnetic core using the amorphous thin strip and the assembly work of the laminated magnetic core using the amorphous thin strip As such, there is Patent Document 1. Patent Document 1 has a plurality of core blocks that form a closed magnetic circuit, the core block is a laminate of a plurality of core pieces, and the core piece has a laminated structure in which a plurality of amorphous thin ribbon pieces are laminated, Magnetic steel sheets are disposed on at least one end surface of the laminated structure in the lamination direction, and a magnetic core and a magnetic core piece are disclosed in which the laminated structure and the magnetic steel sheets are fixed on the laminated surface.

JP 2018-60832 A

Patent Literature 1 discloses a technique for constructing a magnetic core using an amorphous ribbon. There is a problem that iron work and insert iron work become difficult.

Accordingly, the present invention provides a stacked core transformer that secures the mechanical strength and rigidity of the stacked core and is excellent in the assembling and workability of the stacked core.

In order to solve the above problems, for example, the configurations described in the claims are adopted.

The specification of the present application includes a plurality of means for solving the above problems. To give one example, a laminated core transformer is a laminated core transformer having a core in which laminated blocks in which ribbons are laminated are laminated. and a support member for sandwiching the iron core in the stacking direction of the laminated block, and a positioning guide for the laminated block on one of the facing surfaces of the support member.

again,

Advantageous Effects of Invention According to the present invention, in a stacked core transformer, it is possible to secure the mechanical strength and rigidity of the stacked core and improve the assemblability and workability of the stacked core.

FIG. 3 is a perspective view illustrating a support structure of a nanocrystalline core of an example; FIG. 10 is a perspective view showing a state in which the nanocrystalline laminated core of the example is assembled in a U shape (iron work). FIG. 4 is a perspective view illustrating a state in which a coil is inserted into the nanocrystalline core of the example; It is a perspective view explaining the nanocrystal lamination core of an Example. FIG. 4 is a front view of an example U-shaped lower support member; FIG. 4 is a plan view for explaining a stacking operation of stacking laminated blocks of nanocrystalline ribbons of the example. FIG. 10 is a plan view for explaining a stacking work of laminating the second layer of the laminated block of the nanocrystalline ribbon of the example. FIG. 10 is a perspective view illustrating an inserting operation of the nanocrystalline core of the example. It is the perspective view and front view explaining the L-shaped guide which is a positioning guide of an Example. FIG. 4A is a perspective view and a front view illustrating a positioning guide (guide pin) used in the nanocrystalline core of the example. FIG. 4A is a perspective view and a front view illustrating a positioning guide (sheet metal bending guide) used for the nanocrystalline core of the example. FIG. 2 is a front view and a side view illustrating a partially bonded laminated block of nanocrystalline ribbons of an example. FIG. 10 is a side view for explaining a first modification of the partially bonded laminated block of the nanocrystalline ribbon of the example. FIG. 10 is a side view for explaining a second modification of the partially bonded laminated block of the nanocrystalline ribbon of the example. FIG. 4 is a front view for explaining how partially bonded laminated blocks are overlapped in the nanocrystalline core of the example. FIG. 4 is a side view for explaining how partially bonded laminated blocks are overlapped and the tightening position of the nanocrystal core in the nanocrystal core of the example. FIG. 10 is a side view for explaining a method of fixing a non-bonded part of the partially bonded laminated block in the nanocrystalline core of the example.

Examples will be described below with reference to the drawings.

In Example 1, an example of a nanocrystalline core transformer that secures the mechanical strength and rigidity of the nanocrystalline core and is excellent in assembly and workability will be described.

FIG. 1 is a perspective view for explaining the support structure of the nanocrystalline core of the example. At the corners of a U-shaped lower support member (backing plate) 1, L-shaped guides 2a to 2j as positioning guides are arranged. The height of the L-shaped guides 2a-2j corresponds to the thickness of the iron core. The lower support member has an L-shaped guide, is integrally formed with left and right leg irons 5 and 3 and a lower yoke 4, and supports the laminated block 13 (see FIG. 2).

FIG. 2 is a perspective view showing a state in which the nanocrystal-laminated core of Example 1 is assembled in a U shape (laid iron work). Laminated blocks 13 of the nanocrystalline ribbon are laminated on the leg iron (right side) 3, the lower yoke iron 4, and the leg iron (left side) 5 while alternately shifting the positions by the width dimension of the laminated blocks. Also, the laminated blocks 13 are assembled in a U shape while being positioned by the L-shaped guides 2a to 2j (stacked iron work). The support member has an L-shaped guide, and the left and right leg irons 5 and 3 and the lower yoke iron 4 are integrated in a U-shape, and the lower support member 1 that supports the laminated block 13 faces the lower support member 1. and an upper support member 6 (see FIG. 3). The laminated block 13 is obtained by laminating about 10 nanocrystal ribbons having a thickness of about 0.018 mm. However, the number of nanocrystal ribbons is not limited to this, and any number that can be assembled as shown in FIG. 2 may be used. Moreover, the laminated block 13 can also use an amorphous ribbon.

FIG. 3 shows a state in which a U-shaped nanocrystal-laminated core 31 is sandwiched and fixed between upper support members (backing plates) 6, and two coils 20 are inserted from the axial direction. Mechanical strength and rigidity are ensured by sandwiching the fragile nanocrystal core 31 between two supporting members (backing plates). The nanocrystal core 31 is a member in which the laminated blocks 13 are laminated while being shifted by the width dimension of the laminated blocks.

FIG. 4 is a perspective view illustrating a nanocrystal core. FIG. 4 shows a state in which the laminated blocks 7 of the nanocrystalline ribbon are inserted into the gaps of the U-shaped nanocrystalline core 31 while alternately shifting the positions by the width dimension of the laminated blocks 13 (insertion work). ). This completes the nanocrystal core transformer 30 .

Here, details of the inserting operation of the U-shaped nanocrystal core 31 will be described.

FIG. 5 is a front view of the U-shaped lower support member (backing plate) 1. FIG. By using the L-shaped guides 2a to 2j as positioning guides, it is possible to accurately assemble the position of the laminated block 13 of the nanocrystalline ribbon (for example, configured by laminating 10 nanocrystalline ribbons). sexuality is also improved.

For example, as shown in FIG. 6, the first layer of the lamination work of laminating the laminated block 13 of the nanocrystalline ribbon is performed in the order of the leg iron (right side) 3, the lower yoke iron 4, and the leg iron (left side) 5. When assembled, the upper yoke 7 indicated by the dotted line does not originally exist in the piled-up work, but is purposely illustrated. It is necessary to insert the nanocrystal ribbon lamination block 7 into the gap 21 in the later inserting operation.

On the other hand, as shown in FIG. 7, it is necessary to shift by the width dimension of the laminated block in the second layer of the piled iron work. Assemble in order. In this case, the upper yoke 7' indicated by the dotted line also needs to exist at a position shifted by the width dimension of the laminated block 13, and this dotted line portion becomes a gap. The third layer of piled iron work is a repetition of the first layer. The 4th layer of the stacked iron work is a repetition of the 2nd layer. The lower support member 1 is provided with an L-shaped guide, and is formed integrally with left and right leg irons 5 and 3 and a lower yoke 4 in a U-shape to support the laminated block 13 . In the stacking work, the stacked blocks 13 are stacked on the lower support member 1 by an L-shaped guide while being alternately shifted in the longitudinal direction by the width in the lateral direction.

In this way, the stacking blocks 13 adjacent to the positioning guide are stacked with a predetermined gap (the width dimension of the L-shaped guide serving as the positioning guide) left by the positioning guide. Since the positioning guides keep the predetermined distance with high accuracy, the magnetic performance of the iron core can be realized as designed. Laminated blocks 13 adjacent to the positioning guide are generally considered to have excellent magnetic properties when they are stacked with no space between them. However, since it is difficult to laminate the laminated blocks 13 with high accuracy, it is difficult to obtain the desired magnetic properties of the iron core. Therefore, the inventors stacked stacked blocks with high accuracy by using positioning guides. By daringly laminating adjacent laminated blocks 13 with a predetermined interval by a positioning guide, it is possible to obtain an iron core in which laminated blocks are well laminated and to obtain an iron core having magnetic characteristics as designed.

FIG. 8 is a perspective view for explaining the inserting operation of the nanocrystalline core. As shown in FIG. 8, the inserting operation involves inserting the laminated blocks 7 of the nanocrystalline ribbon into the gaps of the U-shaped nanocrystalline laminated iron core 31 while alternately shifting the positions by the width of the laminated blocks. It can be called work. Laminated blocks constituting the upper yoke iron are stuck up to the connection position of the laminated blocks formed on the left and right leg irons 5 and 3. - 特許庁

FIG. 9 is a perspective view and a front view of an L-shaped guide 2a, which is a positioning guide. Since the L-shaped guide 2a has an L-shaped columnar structure arranged on the lower support member (backing plate) 1, laminated blocks of nanocrystalline ribbons (for example, 10 nanocrystalline ribbons are laminated) are stacked. Directional support is possible. The L-shaped guide 2a has a predetermined width dimension 71. As shown in FIG. The predetermined width dimension 71 is about 0.5 mm in consideration of the magnetic properties of the iron core and the support strength of the laminated block 13 . As a result, the adjacent laminated blocks 13 can be laminated with a predetermined gap therebetween.

FIG. 10 shows a first modification of the L-shaped guide, showing a perspective view and a front view of guide pins 8a and 8b. The guide pins 8a and 8b are two cylindrical pins arranged at right angles to the lower support member (backing plate) 1', and are nanocrystalline ribbon laminated blocks (for example, ten nanocrystalline ribbons are laminated). configuration). The guide pin 8a has a predetermined diameter (about 0.5 mm). As a result, the adjacent laminated blocks 13 can be laminated with a predetermined gap therebetween.

FIG. 11 shows a second modification of the L-shaped guide, showing a perspective view and a front view of bending pins 9a and 9b. Bending pins 9a and 9b are manufactured by bending a lower supporting member (backing plate) 1'', and a laminated block of nanocrystalline ribbons (for example, 10 laminated nanocrystalline ribbons) 13. can be positioned. The bending pin 9a has a predetermined dimension (about 0.5 mm) in the width direction. As a result, the adjacent laminated blocks 13 can be laminated with a predetermined gap therebetween.

The L-shaped guide including the modified examples described above is desirably made of a non-magnetic material such as stainless steel or aluminum in order to prevent disturbance of magnetism as an iron core and obtain necessary strength.

In a second embodiment, an example of a nanocrystalline core transformer capable of ensuring the mechanical strength and rigidity of the nanocrystalline core will be described.

FIG. 12 is a front view and a side view of a partially bonded laminated block 10 (for example, configured by laminating ten nanocrystal strips). In the partially-bonded laminated block 10, a plurality of nanocrystalline ribbons 11 are selectively bonded to each other at both ends in the longitudinal direction by an adhesive between the ribbon layers. Assuming that the longitudinal bonding dimension is a predetermined length D2, the blocks are bonded such that D1<D2 with respect to the width dimension D1 of the laminated block. Both ends of the laminated block 13 in the longitudinal direction serve as cutting surfaces for the thin ribbon and the adhesive, so that chipping of the surface of the nanocrystalline ribbon can be prevented. In order to ensure mechanical strength and rigidity, the adhesive 12 may of course be adhered as a whole or may be adhered in spots. The bonded portion of the nanocrystalline ribbon has improved mechanical strength and rigidity, and can stand on its own like a silicon steel plate. In addition, the thin strip layers may be joined by spot welding instead of the adhesive. Here, as another effect of bonding both longitudinal ends of the plurality of nanocrystalline ribbons 11, there is an advantage that the worker can easily handle the partially bonded laminated block 10 in the iron stacking work.

FIG. 13 is a side view of a first variant of the partially bonded laminate block; It is characterized in that the adhesive 12 is also present on the surface of the partially-bonded laminate block 13 (for example, configured by laminating ten nanocrystal strips). In other words, the surface of the ribbon 11 of the laminated block 13 has an adhesive layer. This can prevent chipping of the surface of the nanocrystal ribbon when cutting both ends of the partially-bonded laminate block in the process of manufacturing the partially-bonded laminate block. Therefore, both ends in the longitudinal direction of the partially-bonded laminate block described here are cut surfaces.

FIG. 14 is a side view of a second variant of the partially bonded laminate block. A feature is that the amorphous ribbon 14 is arranged on the surface of the partially bonded laminated block 15 . This is also another method for preventing chipping of the surface of the nanocrystalline ribbon when cutting both ends of the partially bonded laminate block.

FIG. 15 is a front view showing a state in which the partially-bonded laminated blocks 10 are assembled in a U-shape (the upper support member (backing plate) 6 is not shown), and how the partially-bonded laminated blocks are stacked. It is a figure explaining.

FIG. 16 is a side view of the nanocrystal core, and is a side view for explaining how the partially bonded laminated blocks overlap and the tightening position of the nanocrystal core. 15 and 16, how the partially bonded laminated blocks 10 are overlapped in the nanocrystalline core will be described. As described above, the partially bonded laminate block 10 satisfies the relationship D1<D2 when the bonding dimensions are D1 and D2. After the piled iron work, as shown in FIG. 15, it can be confirmed that the bonding range of the partially bonded laminated block 10 partially overlaps with the leg iron (right side). This overlapping manner is the same for the lower yoke iron and leg iron (left side). Here, the dimension of the overlapping portion is (D2-D1). Therefore, as shown in FIG. 16, this overlapping portion (D2-D1) is a portion where the adhesive always exists, and thus has a high strength. By tightening this overlapping portion (D2-D1), the mechanical strength and rigidity of the nanocrystalline core can be improved. Furthermore, this overlapping portion (D2-D1) functions as a stopper for the insert during the inserting operation.

In Example 3, an example of a method for fixing non-bonded portions in a nanocrystalline core will be described.
FIG. 17 is a side view showing a state in which the partially-bonded laminated blocks 10 are assembled in a U-shape by stacking iron. 4 shows a method of fixing a non-bonded part of a partially bonded laminated block in a nanocrystalline core of an example.

As described above, due to the way the partially bonded laminate blocks 10 are stacked, the non-bonded portion is concentrated in the central portion, and the nanocrystal ribbon is not fixed at that portion and remains fragile. A hole is made in the upper support member (backing plate) 6' for the area not adhered by the adhesive in the laminated block, and a press-fit pin 16 is tightened in the hole in the direction of the lower support member 1, thereby performing partial adhesion lamination. The non-bonded portion of the block 10 is fixed in the stacking direction. Thereby, the mechanical strength and rigidity of the nanocrystalline core can be improved. Although not shown, the upper yoke can also be fixed by applying support members (backing plates) to both sides and tightening the press-fitting pins in the same manner as described above.

As described above, according to the above-described embodiments, in the nanocrystal core transformer, the mechanical strength and rigidity of the nanocrystal core can be secured, and the assemblability and workability of the nanocrystal core can be improved.

1, 1', 1'' ・・・・・・・・Lower support member (backing plate)
2a, 2b, 2c, 2d, 2e,
2f, 2g, 2h, 2i, 2j・・・L-shaped guide
3 ・・・・・・・・・・・・・・Legs (Right side)
4 ・・・・・・・・・・・・・・Lower iron
5 ・・・・・・・・・・・・・・Legs (left side)
6, 6'・・・・・・・・Upper support member (backing plate)
7 ・・・・・・・・・・・・Overpass iron
8a, 8b・・・・・・・・・・・・Guide pin
9a, 9b・・・・・・・・Bending pin
10, 10', 10'', 10'''/Partially bonded laminate block
11・・・・・・・・・・・・Nanocrystalline Ribbon
12・・・・・・・・・・・・Adhesive
13・・・・・・・・・・・・・・・Modified example of partially bonded laminated block
14・・・・・・・・・・・・Amorphous ribbon
15・・・・・・・・・・・・・・・Modified example of partially bonded laminated block
16・・・・・・・・・・・・Press fitting pin
20・・・・・・・・・・・・Coil
30・・・・・・・・・・・・Nanocrystalline core transformer

Claims (9)

A laminated core transformer having a core in which laminated blocks in which ribbons are laminated are laminated,
The ribbon is a nanocrystal,
The stacked core transformer is
a supporting member that sandwiches the iron core in the lamination direction of the laminated blocks;
a positioning guide for the laminated block on one of the facing surfaces of the support member ;
The laminated blocks adjacent to the positioning guide are laminated with a predetermined interval therebetween.
A stacked core transformer characterized by: A stacked core transformer including a core in which laminated blocks in which nanocrystalline ribbons are laminated are laminated,
a supporting member that sandwiches the core in the stacking direction of the laminated block;
a positioning guide for the laminated block on one of the facing surfaces of the support member;
The support member is
a lower support member on which the positioning guide is arranged, which is integrally formed in a U shape by the left and right leg irons and the lower yoke, and which supports the laminated block;
an upper support member facing the lower support member ;
The thin strip of the laminated block is selectively adhered with an adhesive to a predetermined length at both ends in the longitudinal direction ,
A stacked core transformer characterized by: In the stacked core transformer according to claim 2 ,
The positioning guide is non-magnetic made of stainless steel or aluminum,
A stacked core transformer characterized by: In the stacked core transformer according to claim 2 ,
The ribbon of the laminated block is longer in the longitudinal direction than the width (D1) in the lateral direction, and is bonded with a predetermined length (D2) in the lamination direction,
The laminated blocks are laminated while being alternately shifted in the longitudinal direction by a width (D1) in the lateral direction,
The laminated blocks forming the upper yoke are stuck up to the connection position of the laminated blocks formed on the left and right leg irons.
A stacked core transformer characterized by: In the stacked core transformer according to claim 2 ,
and a press-fit pin for tightening a region of the laminated block that is not bonded by the adhesive through a hole provided in the upper support member in the direction of the lower support member. In the stacked core transformer according to claim 2 ,
A laminated core transformer, wherein the laminated block has cut surfaces of the ribbon and the adhesive at both ends in the longitudinal direction. In the stacked core transformer according to claim 6 ,
An adhesive layer is provided on the surface of the ribbon of the laminated block,
A stacked core transformer characterized by: In the stacked core transformer according to claim 6 ,
The laminated block sandwiches the ribbon between amorphous ribbons.
A stacked core transformer characterized by: A method for assembling a laminated core transformer having a core in which laminated blocks laminated with nanocrystalline ribbons are laminated,
The ribbon of the laminated block is longer in the longitudinal direction than the width (D1) in the lateral direction and is adhered with a predetermined length (D2) in the lamination direction,
Positioning guides are arranged on a lower support member that supports the laminated block integrally formed in a U-shape by left and right leg irons and a lower yoke, and the laminated block is moved in the lateral direction by the positioning guides. laminated in a state alternately shifted in the longitudinal direction by the width (D1),
Laminated blocks constituting the upper yoke iron are pierced to the connection position of the laminated blocks formed on the left and right leg irons;
A method for assembling a multi-core transformer, characterized by:

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