JPH02198110A - stationary induction appliance - Google Patents

Abstract

PURPOSE:To make a wound core composed of an amorphous magnetic alloy thin strip have a high rigidity so as not to decrease magnetic characteristics by clamping a pair of side clamps disposed on both leg sections of a wound core and by connecting the pair of a side clamps to the clamps disposed in the upper and lower sections of the wound core. CONSTITUTION:A wound core 11 is supported and fixed by an upper clamp 22 with a U-shaped cross section, a pair of side clamps 15, and a pair of lower clamps 18. In this case, since the side clamps 15 is clamped by a bolt 16 and a nut 17 and the lower clamp 18 is clamped by a bolt 20 and a nut 21, the wound core 11 is clamped from the side direction via the side clamps 15, 15 and the lower clamp 18. Thus, the wound core can be supported reliably so that it is not applied with a compressive force in the direction of the stack thickness. As a result, the wound core is made to have a high rigidity, and excellent magnetic characteristics of an amorphous magnetic alloy thin strip forming the wound core can be shown.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a stationary induction electric appliance equipped with a wound core made of an amorphous magnetic alloy ribbon.

(Prior Art) Recently, consideration has been given to using an amorphous magnetic alloy ribbon instead of the conventional grain-oriented silicon steel strip as the core material for wound cores in stationary induction electric appliances such as transformers and reactors.

This amorphous magnetic alloy ribbon is manufactured by ultra-quenching a molten alloy, and has excellent magnetic properties with significantly lower core loss than silicon steel strip.

However, for manufacturing reasons, the amorphous magnetic alloy ribbon has a thickness of about 30 μm, which is about 1/10 of that of the silicon steel strip, and the width of the ribbon is narrow. A wound core formed by winding a thin alloy ribbon has a problem of low rigidity. Therefore, when manufacturing stationary induction electric appliances such as transformers equipped with this wound core, in order to improve the workability of the process of assembling the winding wire and the wound core, a structure that can strengthen the wound core and increase its rigidity is required. It is necessary to take

Conventionally, for example, in a single-cut wound core, the sixth
As shown in Fig. 7 and Fig. 7, an amorphous magnetic alloy ribbon 2 cut in turns is placed around a reinforcing frame 1 that can be divided vertically, and the cut portion of each turn is placed in a step-like manner in the stacking thickness direction. The wound iron core 3 is constructed by winding the iron core 3 so that the iron core 3 is wound, and then subjected to strain relief annealing and wrapped with a band (not shown).

In the single-cut wound core 3 constructed in this way, a part of the reinforcing frame 1 is removed and the windings 4, 4 are assembled in the legs as shown in FIGS. 6 and 7, and then the reinforcing frame is assembled. 1 and the cut portion are returned to their original states to be combined with the υ winding 4.4. The combined winding core 3 and windings a4, 4 are placed on a lower clamp 5 having a U-shaped cross section, a lower clamp 6 is applied from above, and these are tightened and fixed by studs 7 and nuts 8.

In addition, if the width of the wound core cannot be ensured by the width of one amorphous magnetic alloy ribbon 2, the wound core 3 can be constructed by combining a plurality of wound cores 3 into a plate. The conventional structure described above has the following problems.

The lower clamp 5 and the upper clamp 6 that support the wound core 3 have a U-shape in which a portion that covers the periphery of the wound core 3 and a pair of portions that cover both side surfaces of the wound core 3 are integrally formed. This lower clamp 5 and upper clamp 6 are wound around the iron core 3.
Even if the clamps 5 and 6 are fitted onto both silicate parts of the iron core 3 and tightened from above and below with the studs 8 and nuts 9, no tightening force is applied in the width direction of the ribbon of the wound core 3, and the upper and lower parts of the legs and corners are tightened. direction(
A compressive force is applied in the stacking thickness direction). For this reason, the wound core 3 made of the amorphous magnetic alloy ribbon 2, which is particularly sensitive to stress, has a disadvantage in that the core loss characteristics are reduced by about several to 15%.

In addition, when a wound core is constructed by combining a plurality of wound cores 3, it is supported by a lower clamp 5 and an upper clamp 6, which are integrally formed in a U-shape and have a width equal to a plurality of wound cores 3.
In this case as well, the combined wound cores 3 cannot be tightened from the width direction.

For this reason, when mechanical vibrations or other external forces that occur when transporting a stationary induction electric appliance are applied, the wound core 3 moves, albeit slightly, and the end face of the wound iron core 3 may be damaged, resulting in a decrease in quality.

The present invention has been made based on the above-mentioned circumstances, and aims to provide a stationary induction electric appliance in which a wound core made of an amorphous magnetic alloy ribbon can have high rigidity without deteriorating its magnetic properties. purpose.

In order to achieve the above object, the stationary induction electric appliance of the present invention has a wound core formed by winding an amorphous magnetic alloy ribbon, and a front portion and a side surface of the wound iron core that contact the outer circumferential surface of the legs of the wound iron core. Side clamps each having a side surface are provided at the outer corners of both legs of the wound core, and each pair of side clamps is tightened along the width direction of the υ-wound core by a tightening member, and The device is characterized in that each pair of side clamps is connected to an upper clamp and a lower clamp provided at the upper and lower portions of the wound core.

(Function) The wound core can be fixed by applying a tightening force in the width direction of the ribbon by tightening a pair of side J-lungs provided on both legs of the wound core. In addition, although the lower clamp and the upper clamp are connected via the respective side clamps, they are not tightened in the vertical direction, so the lower clamp and the upper clamp are not tightened vertically (in the stacking thickness direction).
No compressive force is applied.

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

1 to 3 show a dry molded transformer which is an embodiment of the present invention, and this transformer is constructed by combining two wound cores.

In the figure, reference numeral 11.11 is a one-turn cut type wound core, which is an amorphous magnetic alloy cut in each turn around a reinforcing frame 13 made of a combination of a lower frame JJ& and an upper frame 13b each made of a stainless steel plate. It is formed by winding the ribbon 12 by a predetermined length so that the cut portion of each turn is located in a stepped manner at the position of the upper silicate portion, and further wrapping a tightening pad (not shown). These wound cores 11.11 are combined in parallel after strain relief annealing, and windings 14.1 are molded into both legs, respectively.
4 is wrapped. Winding 1 is attached to both legs of the wound core 11.11.
After winding 4.14, a pair of side clamps 15.15, each made of a sheet of non-magnetic metal (for example stainless steel), are arranged. As shown in FIG. 4, these side clamps 15.15 have a length corresponding to the leg portions of the wound core 1, and have a side portion 15m and a front portion 15b whose cross sections abut against the side surfaces of the wound core 1. The upper end of 15% of the side surface portions is diagonally cut out, and the upper end of the front surface portion 15b protrudes upward. The width dimension X of the side surface portion 15& of the side clamp 15.15 is set to the winding thickness dimension of the wound core II, and the width dimension Y of the front surface % 15b is set to a dimension slightly smaller than the width of one wound core 11. And side crank f1
5.15 are arranged opposite to each other on both sides of the outside of both legs of the wound core 11.11, and inserted into the inside of the insulating cylinder of the already wound winding 14.14, and as described later, the wound core 111 is placed in the lower part. Side parts 15 that face each other after being fixed with the clamps 7'1B and 1B
h, the upper end of 15m is wound with 1 core.

The wound cores 11 and 11 are tightened and fixed from the width direction by a bolt 16 and a nut 12, which penetrate in the width direction. The wound core JJ, 11 with winding 14.14 and side clamps J5.15 is supported in a pair of lower clamps 18.18. The lower clamps 18.1FI have a length corresponding to the lower part of the wound core 1, and are arranged on both sides of the wound core 11.11 and attached to the pedestal 19.19, as well as in the width direction of the wound core 11.11. Penetrate to? Wound core 11. with bolt 20 and nut 21. II is tightened and fixed from the width direction. In this case, side clamps 15.15 provided on each leg of the wound core 11.11 were formed to protrude from the lower ends of the side surfaces 15m and 15*, respectively. The screws 15e, 15e are engaged with holes 1Rh, 18m formed in the lower clamp 18.18 from the inside of the lower clamp 18.18. An upper clamp 22 is attached to the upper silicate part of the wound core 11.11.
is covered. As shown in FIG. 5, this upper clamp 22 has a U-shaped cross section with a width corresponding to the width of the wound core JJ, 11, and each pair of side clamps 15.1
The side portions 15h and 15h of 5 have an inclined cutout on the side opposite to the upper end thereof, and tongue pieces 21 m + on both ends.
21 m is the standing formation.

And each tongue piece 21a of upper clan f15,15.

21a and each pair of opposing side clamps 15a,
The tightening is fixed by a gel 23 and a nut 24 that pass through the wound core 11.11 in a direction perpendicular to the width direction of the wound core 11.11.

In addition, if it is necessary to increase the rigidity of the pair of side clamps 15.15, the front part 15b.

A reinforcing rod 25 is passed over 15b and tightened with bolts 26 to fix it. Also, the side portion 5b of the side clamp 15.15,
If the holes 27.27 are formed at the upper end of J5b, they can be used as hanging ears when the wound core 11.11 is suspended and supported.

According to this configuration, the wound core 11.11 has a cross section U
a shaped top clamp 22, a pair of side clamps 15.
15 and a pair of lower clamps 11j and 1B. And in this case, the side clan fl s ,
What about J5? The lower clamp 18.18 is tightened by the bolt 16 and nut 17 by the gel 20 and nut 21, respectively, so that the wound core 11.11 is tightened by the side clamps 15.15 and the lower clamps 18.18.
It will be tightened from the width direction through.

In addition, the upper clamp 22, which has a mouth-shaped cross section and fits and supports the upper silicate part of the wound core 11, 11, is connected to the side clamp 15.
．． 15 and not directly connected to the lower clamp 18.18. For this reason the lower clamp 18.1
8 and the upper clamp 22 in the vertical direction, no compressive force is applied to the wound core 11.11 in the vertical direction, that is, in the stacking thickness direction. Moreover, by connecting each pair of side rings 15.15 to the lower clamps 1B, 1g and the upper clamp f22, each clamp can be integrated and the entire wound core 11.11 can be fixed with high rigidity.・
In particular, when a plurality of wound cores 11.11 are arranged side by side to form a wound core as in this embodiment, the plurality of wound cores 11.11 are firmly fixed so that they do not move due to external force or external vibration to prevent damage. can.

Note that the present invention is not limited to transformers, but can be widely applied to other stationary induction electric appliances such as reactors.

[Effects of the Invention] As explained above, according to the stationary induction electric appliance of the present invention, the wound core can be reliably supported so that no compressive force is applied in the direction of its stacking thickness, so that the wound iron core can have high rigidity. In addition, the excellent magnetic properties of the amorphous magnetic alloy ribbon constituting the single-turn iron core can be exhibited.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, and Figures 1 to 3 show a transformer.
→f←〒← shows the side clamp used in the same transformer, -, number ÷ combined figure, Figure 5 is a perspective view showing the upper clamp, Figures 6 and 7 show the conventional transformer. FIG. 1 No..Wound iron core, 12..Amorphous magnetic alloy ribbon, 1
4...Winding, 15...Side clamp, 18...Lower clamp, 22...Upper clamp. Applicant's agent Patent attorney Takehiko Suzue Figure 3 Figure 1 Figure 4 Figure 5

Claims (1)

[Claims] A wound core formed by winding an amorphous magnetic alloy ribbon, a lower clamp that supports the wound core, an upper clamp provided on the top of the wound core, and an upper clamp that comes into contact with the outer peripheral surface of the leg of the wound core. a pair of side clamps each having a front face and a side face abutting the side face, and each pair of side clamps being arranged on both sides of the outside of both leg parts of the winding core and connected to the lower clamp and the upper clamp; A tightening member that tightens the pair of side clamps disposed on both legs of the iron core along the width direction of the wound iron core; A stationary induction electric appliance characterized by comprising a winding wire wound with a winding wire.