JPH03214611A - Amorphous iron-core transformer - Google Patents

Abstract

PURPOSE:To suppress an increase in the external-shape size of an iron core and to enhance the operation property of an iron-core assembly operation by a method wherein a lap is formed by shifting a prescribed amount at each turn. CONSTITUTION:The following are formed: a first layer 31 which has been formed a loop by pulling and arranging both end parts of at least one belt-shaped amorphous magnetic material 3 and by lapping them by a prescribed amount l1; and a second layer 32 which has formed the same loop as the first layer 31 by shifting a lap position by a fixed size l2 at the outside of the first layer 31. In addition, the following are formed: a third layer 33 which has formed the same loop as the first layer 31 so as to coincide with a lap position of the first layer 31 at the outside of the second layer 32; and lap parts which have been sequentially laminated up to an n-th layer alternately. That is to say, since end parts of a blank are lapped at each turn, lap parts are pressed at each turn and laminated sequentially. As a result, both end parts are not rubbed and damaged as different from conventional cases; an iron core can be assembled easily. Thereby, it is possible to obtain an amorphous iron-core transformer which suppresses an increase in the external-shape size of the iron core, whose operation property of a bonding operation and an assembly operation is good and whose magnetic characteristic is excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an amorphous core transformer, and particularly to a joint structure of a lap portion of a cut-wrap core transformer using an amorphous magnetic phase.

[Prior Art] A conventional cup I-wrap iron core transformer using an amorphous magnetic material is disclosed in Japanese Patent Application Laid-open No. 17511.0/1983, but the wrap portion is placed in a straight section and is placed in one place. They were overlapped and joined together.

“Problem to be Solved by the Invention 1 The above-mentioned conventional technology has the problem that insufficient consideration is given to the fact that the overlapped portion of the joint is in one tube, which increases the laminated thickness at that portion, and the outer dimensions of the core increase. However, there was a problem in that it was difficult to check the number of lap blocks when overlapping and joining the lap parts again after the coil was assembled into the core.

An object of the present invention is to provide an amorphous core transformer which minimizes the increase in the core external dimensions and has good joining and assembly workability and excellent magnetic properties.

[Means to solve the problem]

The above purpose is to form a first layer in which both ends of at least one sheet of strip-shaped amorphous magnetic material are aligned and wrapped by a predetermined amount to form a loop, and a first layer in which the wrap position is set to a predetermined size on the outside of the first layer. a second layer forming a loop similar to the first layer;
A configuration in which a third layer has a loop similar to the first layer formed on the outside of the second layer to match the wrap position of the first layer, and a wrap portion is formed by alternately stacking layers up to the n-th layer. This is achieved by an amorphous iron core transformer with

[Function] With the configuration described in section 2, the core cross-sectional area of the lap portion, that is, the overlapping portion of the band-shaped amorphous magnetic phase is doubled, so the actual magnetic flux density becomes 1/2, and as a result, the loss in the lap portion is reduced to 1/2. Almost no magnetic flux leaks out of the iron core, and the magnetic properties of the lap portion are improved. In addition, since the ends of the material are lapped at each turn, the lapped portion is held down at each turn and the material is laminated in sequence, making it easy to assemble the core without damage caused by misalignment of both end faces as in the past. become.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a schematic front view of an embodiment showing the configuration of an amorphous core transformer according to the present invention, and FIG. 2 is an enlarged view of the wrap portion 1 in FIG. Assuming that the number of amorphous magnetic (amorphous magnetic) rA3 sheets in the block is 10 = 4 to 20 sheets, the predetermined size is 0. The lap portions l are formed by shifting the laps overlapped by a predetermined dimension Q2 and laminating them in order at two wrap positions. That is,
First layer 3,, second layer 3. are stacked in order. As a result, the magnetic flux density of the lap portion I becomes 172 that of other portions, and the magnetic properties and heel are improved. Figure 6 shows the relationship between magnetic flux density and iron loss, and Figure 7 shows the relationship between magnetic flux density and excitation capacity, comparing the characteristics of wrapped core A and uncut 1 core B. In the high magnetic flux density region, the excitation capacity of wrapped core B slightly decreases, but both show that they have almost the same characteristics, and as a whole amorphous core, wrapped core B and uncut core A
It can be considered that there is no significant difference in the magnetic properties of the two.

In this case, the core may be manufactured by winding the amorphous magnetic material 3 in a circle and then cutting it, or by cutting the amorphous magnetic material 3 into a predetermined length in advance and then winding it.

(Second Embodiment) The second embodiment is shown in FIG. 3, which is an enlarged view corresponding to the wrap portion 1 of the embodiment in FIG. However, the wraps of the second layer and the third layer are turned upside down to form a wrap portion in which layers are sequentially stacked alternately up to the n-th layer.

FIGS. 4 and 5 show views in which the wrap portion 1 of FIGS. 2 and 3 is in an open state, respectively. The numbers ``■'' to ``■'' in both figures indicate the order of wrap assembly for each block. Comparing the two, the second embodiment shown in FIG. 5 is different from the second embodiment shown in FIG. All you have to do is slide it, and the wrapping work is simple and easy to automate, so assembly work efficiency is improved.

Note that it is preferable that the overlapping dimension between each turn is 20 mm or less to ensure assembly workability. If this dimension becomes too large, workability is good, but material is wasted, which is not preferable. In the above embodiment, the number of amorphous elementary phases in one block is preferably 10 to 20.
Of course, the number of constituent sheets may be alternately wrapped one by one, and "at least one strip-shaped amorphous magnetic material J" in claims 1 and 2 means the above content.

Although illustration as an example is omitted, the layered position of the wrap portion 1 is not limited to only two different locations, and may be changed sequentially from the first layer to the nth layer, or the original layered layer may be changed every multiple times. It may be configured to return to its position.

〔Effect of the invention〕

According to the present invention, in joining amorphous magnetic phases,
It has the effect of suppressing the increase in magnetic flux density and does not impair magnetic properties compared to a no-force core. In addition, by providing a wrap for each turn, the edges of the extremely fragile amorphous magnetic material will not rub against each other, preventing material damage and making it easier to count at the partition position. It is easy to control the number of sheets in one block, and the workability of core assembly is improved because the lap part is pressed down and stacked at each turn.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the wound core transformer of the present invention, FIG. 2 is an enlarged view showing the wrap t'flj of the wound core of FIG. 1, and FIG. FIG. 4 is an enlarged view showing the wrap portion according to another embodiment; FIG. 4 is a view showing the wrap portion in the embodiment shown in FIG. 2 in an open state; FIG. 5 is an enlarged view showing the wrap portion in the embodiment shown in FIG. Figure 6 is a comparative characteristic diagram of wrapped core 8 and uncut core B, which were actually measured for the relationship between magnetic flux density and iron loss, and Figure 7 is a comparison characteristic diagram of wrapped core A and uncut core, whose actual names are 1, regarding the relationship between magnetic flux density and excitation capacity. This is a comparative characteristic diagram of B. 1... Amorphous wound core wrap portion 2... Coil 3... Amorphous magnetic flux 4... Iron core frame

Claims (4)

[Claims] 1. A first belt comprising at least one sheet of strip-shaped amorphous magnetic material whose ends are aligned and wrapped by a predetermined amount to form a loop.
a second layer having a loop similar to the first layer formed by shifting a fixed dimension from the wrap position of the first layer on the outside of the first layer; and a wrap position of the first layer on the outside of the second layer. An amorphous iron core transformer characterized in that a third layer is aligned to form a loop similar to the first layer, and a wrap portion is formed by alternately stacking layers up to the nth layer. 2. The first layer and the second layer of wrap are upside down,
The second layer and the third layer of wrap are turned upside down,
2. The amorphous core transformer according to claim 1, wherein the amorphous core transformer is formed by forming wrap portions in which the following layers are alternately stacked in order up to the n-th layer. 3. The wrap portion is characterized in that the wrap portion is repeatedly shifted from the first layer to at least two wrap positions and then returned to its original position, forming a wrap portion in which the layers are laminated in order up to the n-th layer. 2. The amorphous iron core transformer according to 2. 4. The amorphous core transformer according to claim 1 or 2, wherein the wrap portions form wrap portions in which positions are shifted in order from the first layer to the nth layer.