JPS61180408A - Stationary induction electric apparatus - Google Patents

Abstract

PURPOSE:To improve the magnetic characteristics at the junction part of the cut end face of a laminated block by a method wherein a U-shaped block is formed by laminating amorphous magnetic alloy thin strips, their end faces are respectively abutted against each other to make couples. CONSTITUTION:A wound core 11 is constituted by laminating and arranging lamination materials 14, 15 and 16. The lamination materials 14-16 are formed into U-shape by laminating an amorphous magnetic alloy thin strip 13, and they are composed of the laminated block having both ends making an inclined surface. Laminated blocks 14A-16A and laminated blocks 14B-16B respectively make pairs and abut against opposing end faces 14Aa, 14Ba and are coupled together.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stationary induction electric appliance using a wound core made of an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

One-turn, T-shaped wound cores are used as cores for transformers, reactors, etc. This wound core is made by winding a magnetic metal strip (previously a silicon steel strip) cut at each turn with a predetermined number of turns so that the cut positions are shifted stepwise in the circumferential direction. . This wound core has a stepped stacked structure in which the cut ends of the magnetic metal strips are joined at different positions in a stepped manner for each turn. It is widely used because it has low magnetic resistance and excellent magnetic properties.

Incidentally, an amorphous magnetic alloy ribbon with excellent magnetic properties has recently been developed, and attempts have been made to fabricate a T-shaped wound core in one turn using this material. This amorphous magnetic alloy ribbon is extremely thin and manufactured by ultra-quenching a molten magnetic alloy, and has excellent low-loss characteristics.

Therefore, even when manufacturing a one-turn T-shaped wound core made by winding an amorphous magnetic alloy ribbon, the cut end of the wound amorphous magnetic alloy ribbon can be It is conceivable that the structure of the joint portion of 2 is a stepped layered structure as shown in FIG. That is, a plurality of sets of laminated blocks 2 made up of a plurality of turns of amorphous magnetic alloy ribbons 1 are wound in a staggered manner in the circumferential direction of the winding core, and the cut ends of each laminated block 2 are overlapped in a stepped manner and butted. Join by

However, this joint configuration has the following problems. Since the laminated ribbon (a) is made by laminating a large number of amorphous magnetic alloy ribbons, it is difficult for magnetic flux to flow in the lamination direction. Laminated for this purpose.

Among the magnetic flux flowing between the stacked blocks 2, it becomes difficult for the magnetic flux to flow through the stacked blocks 2 on both sides of the stacked blocks 2 as a bypass path. Therefore, the amount of magnetic flux flowing between the end faces of the laminated block 2 increases. However, since a gap 3 inevitably exists between the end faces of the laminated block 2, the presence of this gap 3 increases the magnetic resistance to the magnetic flux. Therefore, even if stepped lap joints are adopted for the structure of the cut end joints of laminated blocks in wound cores made of amorphous magnetic alloy ribbons,
The magnetic resistance of the joint cannot be reduced, and the magnetic properties of the entire core cannot be improved.

In addition, since the amorphous magnetic alloy ribbon is manufactured by the ultra-quenching method as described above, its thickness is 30 to 50 μm, which is very large.
Moreover, the rigidity is low. For this reason, when manufacturing a one-turn cut type wound core using an amorphous magnetic alloy ribbon, if manufactured using the same method as when using a conventional silicon steel strip, the ribbon would be extremely thin. It takes a lot of work to cut a large number of long ribbons for each turn, and then concentrically wind and assemble the many cut ribbons, especially when combined with a coil. There was a problem in that the thin ribbon easily broke apart and the work was very difficult because there was a risk of the thin ribbon being damaged.

[Purpose of the invention]

The present invention was made based on the above circumstances, and an object of the present invention is to provide a stationary induction electric appliance that can be easily manufactured using a single-cut wound core made of an amorphous magnetic alloy ribbon and having excellent magnetic properties. shall be.

[Summary of the invention]

The stationary induction electric appliance of the present invention includes a laminated block formed into a mouth shape by laminating a large number of amorphous magnetic alloy thin ribbons and having an inclined end surface, and a laminated block having a large number of amorphous magnetic alloy thin ribbons laminated. A wound iron core formed by combining laminated blocks formed in a lever shape and whose end faces are inclined surfaces pairing with the end faces of the laminated blocks by butting each other, and a coil attached to this wound iron core. It is characterized by comprising the following.

In other words, by making the joint structure of the cut ends of the amorphous magnetic alloy ribbon constituting the wound core into a diagonal overlap joint, the magnetic resistance of the joints of the cut ends is reduced, and the amorphous magnetic alloy ribbon during the manufacturing process is reduced. This makes it easier to handle the magnetic alloy ribbon.

[Embodiments of the invention]

Embodiments of the present invention illustrated in the drawings will be described below.

FIG. 1 shows one embodiment of the invention. In the figure, 11 is a rectangular wound core, and 12 is a coil (for example, a transformer coil in the case of a transformer) attached to each leg of the wound iron core 11. The wound core 1 has a rectangular shape, for example, a 3ML laminate 14, 1, in which a large number of amorphous magnetic alloy ribbons 13 are laminated.
It is constructed by concentrically stacking 5°16 pieces.

Each of the laminated bodies 14 to 16 is formed into a mouth shape by laminating a large number of amorphous magnetic alloy thin Wr13 sheets, for example, 160 sheets, and both end surfaces thereof are amorphous magnetic from the inner circumferential side to the outer circumferential side of the laminated block. Laminated blocks 14A, 15A, 16 each having an inclined surface that slopes so that the laminated thickness of the alloy ribbon becomes smaller.
Then, a large number of amorphous magnetic alloy ribbons 13, for example 160 sheets, are
The laminated block 14B is formed into a mouth shape by laminating the laminated blocks, and both end surfaces form sloped surfaces that become smaller from the outer circumferential side of the laminated block toward the inner circumferential side.

It consists of 15B and 16B. Then, these laminated blocks 14 to 16 and laminated blocks 14B to 16
B is a pair of opposing end surfaces 14Aa and 14B*, respectively.
, 14Ab and 14Bb, 15* and 15Rh, 15Ab
and 15Bb, 16kg and 16B* and 16Ab and 16
Each of the laminates 14 to 16 is constructed by butting and joining Bb and combining them.

Here, the end faces 14Aa~ of the laminated blocks J4A~16A
16A & and 14Ab to 16Ab and laminated block 1
4B ~ 16B end face 14B & ~ 16Rh and 14B
b~16 B b&'! , which form a pair of oppositely inclined surfaces, and are brought into contact with each other to form a diagonal overlapping joint as shown in FIG. 2, thereby forming a joint. Note that the joint portion of this end face is located at the leg portion of the wound core. Also, 1 in the figure
7 is an iron core frame provided on the inner peripheral side of the wound iron core 11.

However, the single-cut wound core 11 with such a configuration
Since the end faces of the laminated fa2 blocks 141L to 16A and the end faces of the laminated blocks 14B to 16B are joined in a diagonally overlapping state, for example, the coil 12 attached to the leg of the wound core 11 is used to attach a ribbon to the joint part. When tightening force is applied from both sides in the stacking direction, the gap between the joints becomes very small. Therefore, the magnetic resistance to the magnetic flux passing through the end faces of the laminated block 14 through 16A and 14B through 16B is very small, and the magnetic properties of the end face joints are improved.

In addition, the laminated fa, ri 14 to 16 and laminated block 14B
By diagonally stacking and joining the respective end faces of ~16B, a large number of amorphous magnetic alloy ribbons 13 can be stacked and handled in one set of laminated blocks. Moreover, the entire wound core 11 is divided into pairs of laminated blocks 141 to 16 and 14B to 14B.
By dividing the laminated block into 16B, coil 1
2 can be easily assembled.

Next, the case of manufacturing the wound core 11 will be explained with reference to FIGS. 3 to 11.

First, as shown in FIG. 3, an amorphous magnetic alloy thin ribbon 13 is wound, and a part of this wound body is cut along the A-A line to form a large number of amorphous magnetic alloys whose lengths are gradually increased. A laminate 18 is obtained by laminating the thin body 13t. One end 1 of this laminate 18
8 & are fixed with a fixing tool 19 in a constant alignment so that the thin strips 13 do not shift from each other.

Next, by bending the laminated body 18 formed as shown in FIG. The end surface of the other end portion 18b of the laminate 18 is formed as an inclined surface along the longitudinal direction with deviation in the longitudinal direction. Note that the end portion 18 of the laminate 18
The deviation length of the ribbon in b is 4π1 (1: laminated thickness of the ribbon).

Next, as shown in figure M5, when the other end 18b of the laminate 18 is fixed with the fixture 20 and the laminate 18 is expanded, the end face of the one end 18m is tilted to the slope of the other end 18b. It is formed as an inclined surface having an inclination in the opposite direction to the surface. - The ribbon deviation length at this end 18a is 2πt.

Then, the laminate 18, whose end surfaces are sloped in opposite directions, is divided in the thickness direction into three sets of laminates 14, 15,
Divide into 16 VC. The thickness to of these laminates 14 to 16
becomes t/3.

Next, each laminate 14 to I6 is laminated to 7#Kotoku J4A to
The laminated blocks 14A to 16 are divided into 16 and 14B to 16B, and the divided laminated blocks 14A to 16 are formed into the shape shown in FIG. 1 and assembled. 'This manufacturing process will be explained using the case of the laminate 14 as an example. As shown in FIG. 6, the end (74Bm) of the laminate 14 with the smaller deviation is fixed with the fixture 21, and the laminate 14 is fixed so that the side with the smaller length of this end becomes the outer periphery. bend. The deviation length of the fixed side end (148a) of the laminate 14 remains unchanged at 2πt, and the deviation length of the other end (74Ab) becomes 5πt.
In this state, the laminate 14 is cut along the line B-B to divide it into the laminate block 14 and the laminate fr:I block 14B.

Next, as shown in FIG.
2, and bend this laminated block 14kIcI circumference to shift the end face of the cut end 14a so that the length is 2πt.
It is formed on an inclined surface that is 0.

Furthermore, as shown in FIG. 8, by fixing the ends 14A& with a fixture and bending the stacked block J4A in the opposite direction, the deviation length of the end face of the end 14Ab is 2πt,
shall be. As a result, the laminated block Z4At-U is formed, and both end surfaces thereof are inclined surfaces such that the laminated ribbon thickness decreases from the inner circumferential side to the outer circumferential side. That is, the end face is formed in a shape that opens toward the tip.

The other laminated block 14B is bent in the opposite direction from the state shown in FIG. 6 to form a mouth shape as shown in FIG. 9, and the cut end 14B
A tilted end face is formed by giving a shift to b. The deviation length of this end face is 2πt. Both end surfaces of the laminated block 14B, which is U-shaped from K, are inclined surfaces in which the laminated ribbon thickness decreases from the outer circumferential side toward the inner circumferential side. That is, the laminated block 14B is formed so that the end surface tapers toward the tip.

Additionally, other laminated blocks 151, 16 and 15B
, 16B as the laminated block 14A.

It is formed in the same manner as 14B.

As shown in FIG. 10, the laminated blocks 14A to 16k are concentrically stacked on a part of the outer periphery of the rectangular winding core 23, and the laminated blocks 14B to 16k are arranged on other parts of the outer periphery.
16B are concentrically stacked and each stacked block is formed into a mouth shape by applying pressure from the outside.

Next, the laminated blocks 14A to 16 and 14B to 1
6B into the coil 12 to assemble the wound core 11. That is, after opening a part of the iron core frame 17 and passing it through the coil 12, 1
Assemble by passing it through the coil 12 in order from 4B. When a laminated block is inserted into the coil 12, the first Φ diagram will be explained using the laminated block 14B as an example. The lock 14B is inserted into the coil 12, and then the laminated block J4A whose end face is open toward the tip is inserted into the coil 12.
2, insert the laminated block J4A and the laminated block 1dB
The end faces of the two are overlapped and joined. In this way, the two sets of stacked blocks 14 can be easily assembled with the blocks 14B. In addition, other laminated blocks 15 A, 1
5B, 16A, and 16B are assembled in the same manner.

In this way, an assembly of the wound core 1 and the coil 12 is manufactured, and this assembly is used for a transformer, a reactor, etc.

〔Effect of the invention〕

As explained above, the stationary induction electric appliance of the present invention can improve the magnetic properties at the joints of the cut end faces of the laminated blocks made of amorphous magnetic alloy thin ribbons constituting the wound core, and the wound iron core has excellent magnetic properties. It is also possible to easily manufacture wound cores.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the stationary induction appliance of the present invention, Fig. 2 is an explanatory view showing an enlarged end face joint of a laminated block in a wound core, and Figs. 3 to 11 are stationary induction FIG. 12 is an explanatory diagram showing the process of manufacturing electric appliances, and FIG. 12 is an explanatory diagram showing the end surface joints of laminated blocks in a conventional wound core. 1. Winding core, 12. Coil, 13. Amorphous magnetic alloy ribbon, 14, 15.16. Laminated professional. the law of nature. Applicant's representative Patent attorney Takehiko Suzue Figure 4 Figure 5 Figure 6 Figure 4A

Claims (2)

[Claims] (1) A laminated block that is formed into a ■ shape by laminating a large number of amorphous magnetic alloy ribbons and has an inclined end surface, and a laminated block that is formed by laminating a large number of amorphous magnetic alloy ribbons into a ■ shape. and a coil attached to the wound core. Characteristic stationary induction appliances. (2) The end face of one of the laminated blocks is inclined so that the laminated thickness of the amorphous magnetic alloy ribbon decreases sequentially from the inner circumferential side to the outer circumferential side of the laminated block, and the end face of the other laminated block Claim 1: The end face of the block is an inclined face such that the laminated thickness of the amorphous magnetic alloy ribbon decreases sequentially from the outer circumferential side to the inner circumferential side of the laminated block. Stationary induction appliances as described in .