JPS6053006A - Wound iron core - Google Patents

Abstract

PURPOSE:To fully improve magnetic characteristics and simplify construction of iron core manufacturing equipment by removing magneto striction giving tension to an amorphous magnetic alloy thin strip wound around a spool. CONSTITUTION:A wound iron core is rectangularly formed by winding an amorphous magnetic alloy thin strip 2 around a spool 1 made of insulation material. On a pair of mutually facing shorter sides (yokes) of the wound iron core, a wedge type spacer 3 is inserted along the axis of the wound strip between the spool 1 and the innermost strip 2 wound around the spool 1. The wedge can securely provide tension against the total amorphous magnetic alloy thin strip 2 wound around the spool 1 and can fully bring excellent magnetic characteristics reducing magneto striction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wound core in which an amorphous magnetic alloy ribbon is continuously wound around a winding frame.

[Technical background of the invention and its problems]

In power distribution transformers and the like, wound cores are used in which core material is continuously wound around a winding frame.

Silicon steel strip has conventionally been used as the core material for this wound core, but recently the use of an amorphous magnetic alloy ribbon produced by J cutting by an ultra-quenching method has been considered.

Amorphous magnetic alloy ribbons are composed of metals such as iron and metalloids such as phosphorus and boron, and are expected to be used as iron core materials because of their low magnetic loss and excellent magnetic properties. . However, this material tends to be amorphous and the alloy composition that can provide a high magnetic flux density is limited to about 80 atomic ratios of iron, which has the disadvantage that the magnetostriction is as large as 30 to 40 x I F6.

Moreover, this material with large magnetostriction is particularly sensitive to the influence of external stress and its magnetic properties deteriorate. Therefore, when manufacturing a wound core using this material, there is a problem in that the material is subjected to external stress during manufacturing and core clamping, which deteriorates magnetic properties and generates large noise.

As a countermeasure to this problem, it has been considered to add tension to the material. That is, pe-B-8t alloy and Fe-P-
Iron-based amorphous magnetic alloy ribbons such as C-based alloys have significant positive magnetostriction, and it is said that the magnetic properties of materials with this positive magnetostriction improve when tensile stress is applied in the direction of magnetization. Conventionally, attempts have been made to utilize this property to remove magnetostriction by applying tension to the material when manufacturing a wound core using amorphous magnetic alloy ribbon.

In this case, one method is to use a ribbon support reel to support the ribbon and a receptacle for winding the ribbon supplied from the support reel when winding the amorphous magnetic alloy ribbon onto a winding frame. Thin/
Tension is applied to the amorphous magnetic alloy ribbon to be wound by providing a weight between it and the hanging reel or by providing a braking mechanism on the ribbon support reel. Another method is to wind the ribbon around a winding frame made of a material having a larger coefficient of thermal expansion than the amorphous magnetic alloy ribbon, and then apply tension to the ribbon during annealing due to the difference in coefficient of thermal expansion.

However, such conventional methods have the following problems. That is, the former method requires equipment to apply tension to the amorphous magnetic alloy ribbon when it is wound.
The structure of the wound core manufacturing device becomes complicated and uneconomical. Furthermore, in the latter method, it is difficult to reliably maintain a state in which tension is applied to the amorphous magnetic alloy ribbon after annealing the wound core.

[Purpose of the invention]

The present invention has been made in consideration of the above-mentioned circumstances, and is capable of fully exhibiting its magnetic properties by reliably applying tension to the amorphous magnetic alloy ribbon wound around the winding frame to remove magnetostriction, and is also an iron core manufacturing apparatus. The purpose of the present invention is to provide a winding iron that can simplify the configuration of the winding iron.

[The essence of invention]

The uninvented wound core has a spacer inserted between the winding frame and the 1vl-15-layer of amorphous magnetic alloy thin IW and the wound layer of the amorphous magnetic alloy thin strip. This is a thin ribbon with tension applied to it.

[Embodiments of the invention]

Embodiments of the present invention illustrated in the drawings will be described below. FIG. 1 shows an embodiment of the wound core of the present invention. This wound core is formed into a rectangular shape by winding an amorphous magnetic alloy ribbon 2 around a winding frame 1 made of an insulating material. Between the winding frame I and the innermost winding layer of the amorphous magnetic alloy ribbon 2 wound around the winding frame 1 at the 0 part (silicon iron part) of a pair of short sides facing each other of this winding core. A wedge-shaped spacer 3 is inserted into each along the winding axis direction. 3 in cuneiform is 2nd
As shown in the figure, it is wedge-shaped with different thicknesses along the length direction, and when inserted between the winding frame 1 and the amorphous magnetic alloy ribbon 2, the wedge action causes the amorphous magnetic alloy ribbon to Push 2 outwards. In this case, the amorphous magnetic alloy is wound around the winding frame 1 by wedge-shaped spacers 3 inserted between the winding frame 1 and the amorphous magnetic alloy ribbon 2 on the mutually opposing short sides of the winding core. Tension can be reliably applied to the entire ribbon 2. Note that the wedge-shaped spacer 3 is formed of a nonmagnetic alloy or an organic material molded product. Moreover, not only one spacer 3 may be provided at the same location, but also a plurality of spacers 3 may be provided.

FIG. 3 shows another embodiment of the wound core of the present invention, in which the same parts as in FIG. 1 are given the same reference numerals. In this embodiment, the winding frame 1 is
A horizontal spacer 3 is inserted along the winding axis direction between the middle winding layers of the amorphous magnetic alloy thin layer 2 wound around the winding. In this case as well, each wedge-shaped spacer 3 can reliably apply tension to the entire amorphous magnetic alloy ribbon 1 wound around the winding frame 1. Although the wedge-shaped sheath 3 is provided at only one location on each short side of the wound core in FIG. 3, the wedge-shaped sheath 3 is provided at multiple locations spaced apart in the stacking direction of the amorphous magnetic alloy ribbon 2. A wedge-shaped spacer 3 may be inserted between each of the J bands. Moreover, instead of just providing one wedge-shaped spacer 3 between the same winding layers, a plurality of wedge-shaped spacers 3 may be inserted.

The embodiment of the wound core shown in FIG. 4 has wedge-shaped spacers 3 inserted between the winding frame 1 and the amorphous magnetic alloy ribbon 2 and between the wound layers of the amorphous magnetic alloy ribbon 2. be.

The wound cores of the embodiments shown in FIGS. 1, 3, and 4 are made by winding an amorphous magnetic alloy ribbon 2 around a winding frame 1, then annealing it, and then inserting wedge-shaped spacers 3 at predetermined positions. Manufactured by inserting into.

Therefore, the wound core of the embodiment shown in FIG. 1, FIG. 3, and FIG. Since the wedge-shaped spacer 3 is inserted between the winding layers to apply tension to the amorphous magnetic alloy ribbon 2, the magnetostriction of the amorphous magnetic alloy ribbon 2 is reduced.
The amorphous magnetic alloy ribbon 2 can fully exhibit its original excellent magnetic properties without being affected by external stress. In addition, since the wedge-shaped cover 3 is always inserted into a predetermined position of the wound core, tension can always be applied to the amorphous magnetic alloy ribbon 2 to maintain a state in which it can fully exhibit its magnetic properties. Furthermore, when winding the amorphous magnetic alloy ribbon 2 onto the winding frame 1 in the manufacturing process of the wound core, it is necessary to provide a weight to apply tension to the ribbon 2 and a braking mechanism to the ribbon support roll. Since there is no need for this method, the equipment for the wound core manufacturing device does not become complicated and is economical.

The embodiments of the wound core shown in FIGS. 5 to 7 are each a combination of a wedge-shaped spacer and a reinforcing plate for reinforcing the core.

The wound core shown in FIG. 5 has U-shaped reinforcing plates 4 facing each other from both sides of the winding frame 1 on the outer periphery of the winding frame 1. It is formed by winding a thin magnetic alloy ribbon 2. The reinforcing plate 4 is made of a silicon steel plate or a non-magnetic steel plate. A wedge-shaped spacer 3 is inserted between the winding frame 1 and the reinforcing plate 4 combined therewith at each of the opposing short sides of the wound core.

The wound core shown in FIG. 6 has a winding frame 1 and an amorphous magnetic alloy ribbon 2.
In the middle of winding, two U-shaped reinforcing plates 4
. It is formed by winding a magnetic alloy ribbon 2. Two reinforcing plates 4, 4 overlapped each other at each short side of the wound core.
In addition, a wedge-shaped spacer 3 is inserted between the reinforcing plate 4
, 40 stacked one on top of the other, the amorphous magnetic alloy ribbon 2 is wound in one place J&.

It may be provided not only between the winding layers but also between two or more winding layers.

The wound core shown in FIG. 7 is a combination of the configurations of the wound cores shown in FIGS. 5 and 6. That is, a pair of reinforcing plates 4 are combined on the outer periphery of the winding frame 1, and between the reinforcing plates 4 and the winding frame 1, 1. l! A shaped spacer 3 is inserted, and two reinforcing plates 4.4 are placed between the windings of the amorphous magnetic alloy thin strip 2 and 1□□□, and each set is reinforced. Board 4
, 40, a wedge-shaped spacer 3 is inserted between them.

The wound core shown in FIGS. 5 to 7 is made by combining amorphous ItA alloy thin 'iiF 2 with a reinforcing plate 4, winding it around a winding frame 1, annealing it, and then attaching a wedge-shaped spacer 3 in a predetermined position. Manufactured by inserting it into the location.

Therefore, the wound cores shown in FIGS. 5 to 7 are wound around the winding frame 1 using wedge-shaped sheaths 3, similar to the wound cores shown in FIGS. 1, 3, and 4. Amorphous magnetic alloy ribbon 2
By applying tension to the ribbon, the magnetostriction of the amorphous magnetic alloy ribbon 2 can be removed and the magnetic properties can be fully exhibited, and the tension applied to the twisted ribbon 2 can be maintained at all times. Moreover, the configuration of the wound core manufacturing apparatus can also be simplified. Furthermore, since the reinforcing plate 4 is combined with the amorphous magnetic alloy ribbon 2, the rigidity of the wound core can be increased. That is, since the amorphous magnetic alloy ribbon 2 is extremely thin (about 0.03 mm), it lacks rigidity as a wound core. Therefore, amorphous magnetic alloy ribbon 2
By combining with the reinforcing plate 4 and winding it around the winding frame I,
It can compensate for the lack of rigidity of the wound core and increase its rigidity. Therefore, the influence of external stress on the amorphous magnetic alloy ribbon 2 can be alleviated, and deterioration of magnetic properties can be prevented. This effect is the sixth
This is noticeable when the reinforcing plate 4 is provided as shown in the figure.

In each of the wound cores shown in FIGS. 1 to 7, when inserting the wedge-shaped spacer 4, the wound core should be wound with a test excitation winding scarlet in advance, or a predetermined winding process should be performed. later,
An alternating current voltage is applied to the winding, and the thickness and insertion depth of the wedge-shaped spacer 4 are adjusted so that the excitation current, electric energy, and noise value are minimized, and the wedge-shaped spacer 4 is inserted at an optimal position.

i. After inserting the wedge-shaped spacer 3,
The wedge-shaped spacer 3 can be fixed to the wound core by applying or impregnating an adhesive such as a synthetic resin onto the spacer insertion portion and hardening the adhesive.

In addition, in the wound core of each embodiment described above, the wedge-shaped spacer 3
The wedge-shaped hardeners 3 are inserted at both value sides of the wound core, but the wedge-shaped spacer 3 is not limited to this, and may also be inserted at a pair of mutually opposing long sides of the wound core. Although wedge-shaped spacers are advantageous for applying tension to the amorphous magnetic alloy ribbon 2, the spacer is not limited to this, and flat plate-shaped spacers can also be used.

〔Effect of the invention〕

As explained above, the wound core of the present invention applies tension to the amorphous magnetic alloy ribbon continuously wound around the winding frame by applying tension to the amorphous magnetic alloy ribbon. Magnetostriction can be reduced to fully utilize the eroded magnetic properties, and the tension applied to the ribbon can be maintained at all times. Furthermore, there is no need to provide equipment for applying tension to the ribbon in the apparatus for manufacturing the wound core, and the configuration of the manufacturing apparatus becomes simple.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the wound core of the present invention, and FIG.
The figure is an enlarged sectional view for explaining the effect of inserting a spacer into the wound core, and FIGS. 3 to 7 are perspective views showing other embodiments different from each other. 1... Winding frame, 2... Amorphous magnetic alloy ribbon, 3...
Wedge-shaped spacer, 4... reinforcing plate. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3 Fang 4 Figure Rice 5 Spear 6 Figure Udoor i, j!

Claims (1)

[Claims] → In a case where an amorphous magnetic alloy ribbon is continuously wound around a winding frame, the space between the innermost wound layer of the amorphous magnetic alloy ribbon and the winding frame and the amorphous magnetic alloy A wound iron core 0 characterized in that a sweeter is inserted into at least one of the wound layers of the i7 band.