JPH0610654Y2 - Winding core transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a wound core transformer including a wound core and windings fitted to the legs of the wound core.

[Prior Art] When forming an iron core from a magnetic thin strip (strip) such as an amorphous magnetic alloy or a silicon steel strip, a cut core type wound iron core is often used.

As is well known, a cut core type wound iron core has two U formed by cutting a wound body of a substantially rectangular amorphous magnetic alloy ribbon into two at a portion corresponding to an iron core leg. It has a structure in which half-shaped iron cores are butted.

FIGS. 4 to 6 show the structure of a conventional transformer using this type of wound iron core. In these figures, 1 is U
It is a wound iron core formed by abutting the abutting portion C with the character-shaped iron core half portions 1A and 1B. This winding iron core has first and second yoke portions 1a and 1b, and a first iron portion extending between these yoke portions.
And second leg portions 1c and 1d, and box-shaped first and second winding support members 3A and 3B are arranged along with the first and second yoke portions 1a and 1b, respectively. ing.

Winding support metal fittings 4A, 4A, ... And 4B, 4B, ... Are welded to the first and second winding wire supporters 3A and 3B, respectively.

One ends of plate-shaped first and second connecting tools 5A and 5B are welded to the first winding support tool 3A, and stud bolts 5a and 5b are welded to the other ends of these connecting tools. The first and second connecting members 5A and 5B are arranged along the outer surfaces of the first and second leg portions 1c and 1d of the wound iron core, and these connecting members 5A and 5B are respectively attached to the leg portions 1c and 1d.
It is also inserted into the windows of the windings 6 and 7.

Then, bolts 5a and 5b at the other ends of the first and second connecting members 5A and 5B are inserted into holes 3a and 3b provided in the second winding support member 3B, and nuts 8a and 8b are respectively attached to these bolts. Are screwed together, and the coupling tools 5A and 5B are fastened to the second winding support tool 3B by tightening these nuts.

Winding support insulators 9A and 9B are disposed between both ends of the windings 6 and 7 and the winding support fittings 4A and 4B, respectively, and the windings 6 and 7 are connected to each other via the winding support insulators. It is supported with respect to the first and second winding supporters 3A and 3B.

[Problems to be Solved by the Invention] In a transformer using a wound iron core, when the frequency is increased, the iron core vibrates due to the magnetostriction phenomenon of the iron core, and extremely high noise is generated. In particular, when a cut core type wound iron core is used, large noise is generated near the joint of the iron core. This noise is generated more in the wound core transformer using the amorphous magnetic alloy ribbon than in the wound core transformer using the ribbon of silicon steel plate.

In the conventional transformer, since no measures have been taken to prevent such noise from leaking to the outside, a lot of noise leaks to the outside, which is a problem.

Further, in the conventional wound iron core transformer, since the winding support insulators 9A and 9B are simply held in contact with the winding support fittings 4A and 4B, the winding support insulator is held between the winding and the winding support fittings. There is a problem in that the positioning of the winding supporting insulator is troublesome when inserting between the wire and the wire, and the work is time-consuming.

An object of the present invention is to provide a wound core having first and second yoke portions and first and second legs extending between the yoke portions, and to the first and second yoke portions, respectively. Of the first and second winding supports arranged along with each other, the first and second connecting tools for connecting the first and second winding supports, and the first and second legs. In a winding core transformer including at least one of the windings, the winding being wound around at least one of the windings and being supported by the first and second winding supports via a winding support insulator, noise generated from the winding core is external It is to suppress the leak.

Another object of the present invention is to make it possible to easily position the winding support insulator in the wound core transformer as described above.

[Means for Solving the Problems] In the present invention, the first and second winding support tools are formed in a U-shaped cross section, and the winding support tools are respectively provided with the first winding support tool.
And the second yoke portion so as to cover the outer surface and the laminated surface. Further, the first and second connecting members are also formed to have a U-shaped cross section, and these connecting members are arranged so as to cover the outer surfaces and the stacking surfaces of the first and second leg portions, respectively.

The wound iron core is formed by, for example, abutting two substantially U-shaped iron core halves, which correspond to one obtained by cutting a wound body of an amorphous magnetic alloy ribbon having a substantially rectangular shape into two.

Also, to facilitate positioning of the winding support insulator,
A pocket for fitting and positioning a winding support insulator is provided on the first and second winding supports.

[Operation] With the configuration described above, since the outer surfaces of the yoke portions and the legs of the wound iron core and the laminated surface are covered, it is possible to prevent noise generated from the wound iron core from leaking to the outside. The noise of the transformer can be reduced.

Further, with the above-mentioned structure, since the legs of the wound iron core are supported from three sides, the mechanical strength of the iron core against vibration generated during transportation and operation of the transformer can be increased.

Further, when the winding supporting tool is provided with a pocket for fitting the winding supporting insulator, the winding supporting insulator can be positioned and fixed only by fitting the winding supporting insulator in the pocket. Positioning of the wire support insulator can be facilitated, and assembly work of the transformer can be facilitated.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

An embodiment of the present invention is shown in FIGS. In these figures, 10 is the first and second yoke portions 10a and 1
0b and the first and second leg portions 10c and 10d extending between these yoke portions are known cut core type wound cores. The wound core is formed by winding an amorphous magnetic alloy thin ribbon wound into a substantially rectangular shape and then forming the leg portion 10.
c, 10d are cut in two at an intermediate position and divided into two U-shaped core half portions 10A and 10B and then annealed, and the core half portions 10A and 10B are butt-joined by a butt portion C, It has a structure in which it is tightened and fixed by an iron core tightening band (not shown).

Reference numerals 11 and 12 denote iron first and second winding supporters respectively covering the first and second yoke portions 10a and 10b of the winding iron core, and these winding supporters have a U-shaped cross section. ing. The winding supporters 11 and 12 are the first of the winding cores, respectively.
And the second yoke portion, the yoke portions 10a and 10b of the wound iron core are housed in the inside, and the outer side surface S of the yoke portions 10a and 10b is accommodated by the winding supporters 11 and 12. And the stacking surface L are completely covered.

In this example, both ends of the winding supporters 11 and 12 in the longitudinal direction are closed by end walls 11a, 11a and 12a, 12a, respectively, so that both winding supporters are formed in a box shape.
It is also possible to omit these end walls and form both winding support members in a channel shape with both ends open.

To the bottom wall portion 11b of the first winding support tool 11, one ends of the first and second connecting tools 13 and 14 made of iron and having a U-shaped cross section and arranged with their openings facing each other are welded. The stud bolts 15 and 16 are welded to the other ends of these connectors. The distance d (see FIG. 1) between the bottom wall portions 13a and 14a of the first and second coupling tools 13 and 14 is equal to the distance between the outer surfaces of the legs 10c and 10d of the wound core 10, or The distance is set to be slightly larger than the distance, and the side wall portions 13b of the coupling tools 13 and 14 are
Interval t between 13b and between 14b and 14b (see FIG. 3)
Is set to be equal to or slightly larger than the width of the amorphous magnetic alloy ribbon forming the wound iron core 10.

Then, the wound iron core 10 is inserted between the first and second connecting members 13 and 14, and the connecting surfaces 13 and 14 form the outer surface S of the first and second leg portions 10c and 10d and the laminated surface at both ends. L and L are completely covered.

Reference numerals 17 and 18 are windings having a structure in which a low-voltage winding and a high-voltage winding are concentrically arranged, and these windings are arranged in the respective inner windows of the first and second leg portions 10c and 10d of the winding iron core. It is wound around a wound iron core in a state where the first and second connecting tools 13 and 14 are fitted together. Bolts 15 and 16 at the ends of the first and second connecting members 13 and 14 projecting from the windings 17 and 18 are provided in the bottom wall portion 12b of the second winding supporting member 12 so as to form holes 19 and 20. Is fitted to. Bolt 1
Nuts 21 and 22 are screwed to 5 and 16, respectively,
By tightening these nuts, the second winding support tool 12 and the connecting tools 13 and 14 are connected.

The first and second winding supporters 11 and 12 are provided with duct-shaped winding support insulator fitting pockets 23 and 24 located outside the first and second coupling tools 13 and 14, respectively. ing. These pockets are formed by welding the plates 23a and 24a and the like to the winding support, and the pocket 2
Winding support insulators 25 and 26 are fitted to 3 and 24, respectively, and both ends of the windings 17 and 18 are connected to the first and second winding support tools 11 and 12 via these winding support insulators.
Supported against.

To assemble the above winding core transformer, first, the core half 10A that constitutes the lower half of the winding core is inserted between the first and second connecting members 13 and 14 fixed to the winding support 11. Next, the winding support insulator 25 is inserted into the pocket 23 of the first winding support tool 11, and the windings 17 and 18 are fitted to the portions corresponding to the legs of the iron core half 10A and the coupling tools 13 and 14. Then, the windings 17 and 18 are brought into contact with the winding supporting insulator 25.

Then, another iron core half portion 10B is inserted between the coupling tools 13 and 14, and the portion corresponding to the leg portion of the iron core half portion is inserted into the window portion of the windings 17 and 18, and the leg of the iron core half portion 10B is inserted. The portion corresponding to the portion is butted and joined to the portion corresponding to the leg portion of the iron core half portion 10A inside the window portion of the winding. After that, the iron core half portions 10A and 10B are tightened and fixed by an iron core tightening band not shown.

The winding support insulator 26 is then inserted into the pocket 24 of the second winding support 12 and the second winding support 12 is placed over the first and second couplings 13 and 14. The bolts 15 and 16 are fitted into the holes 19 and 20, respectively. Then, nuts 21 and 22 are screwed into these bolts 15 and 16, respectively, and by tightening these nuts, the second winding support tool 12 is fastened to the coupling tools 13 and 14, and the windings 17 and 18 are connected at both ends. Winding supports 11 and 1 tightened from
Support for 2.

In the above embodiment, the winding is wound around both the leg portions 10c and 10d of the wound iron core, but the winding may be wound around only one of the leg portions.

In the above embodiment, the wound iron core is made of the amorphous magnetic alloy ribbon, but the present invention can be applied to the case where the wound iron core is made of silicon steel strip.

[Advantage of the Invention] As described above, according to the present invention, the winding support and the coupling are both formed in a U-shaped cross section, and the outer surfaces and the laminated surfaces of the yoke portions and legs of the winding core are formed. Since the cover is covered, noise generated from the wound iron core can be suppressed from leaking to the outside, and there is an advantage that the noise of the transformer can be reduced.

Further, according to the present invention, since each leg of the wound iron core is supported from three sides, the mechanical strength of the iron core against vibration generated during transportation and operation of the transformer can be increased.

In particular, according to the invention as defined in claim 2, since the winding supporting tool is provided with the pocket into which the winding supporting insulator is fitted, the winding supporting insulation is simply fitted into the pocket. The object can be positioned and fixed, and the winding supporting insulator can be easily positioned to facilitate the assembly work of the transformer.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing the construction of an embodiment of the present invention,
2 is a perspective view of a main part of the same embodiment, FIG. 3 is an exploded perspective view of a winding support tool and a connecting tool used in the same embodiment, and FIG. 4 is a cross-sectional view showing a configuration of a conventional transformer, FIG. 5 is a perspective view of a main part of the conventional example, and FIG. 6 is an exploded perspective view showing a winding support tool and a connecting tool used in a conventional transformer. 10 ... Winding iron core, 10a and 10b ... 1st and 2nd yoke parts, 10c and 10d ... 1st and 2nd leg part, 11 ... 1st winding support tool, 12 ... 2nd winding support Tool, 13 ... 1st
, 14 ... Second connector, 17, 18 ... Winding.

Claims (2)

[Scope of utility model registration request] 1. A wound iron core having first and second yoke portions and first and second legs extending between the yoke portions, and a winding core added to the first and second yoke portions, respectively. First and second winding supporters arranged in parallel, first and second coupling tools for coupling the first and second winding support tools, and the first and second coupling tools
A winding core wound around at least one of the legs and supported by the first and second winding supports via a winding support insulator. The first and second winding supporters are formed to have a U-shaped cross section, and are arranged so as to cover the outer surfaces and the laminated surfaces of the first and second yoke portions, respectively. The winding core transformer, wherein the connector has a U-shaped cross section and is arranged so as to cover the outer surface and the laminated surface of the first and second legs, respectively. 2. The wound core transformer according to claim 1, wherein each of the first and second winding support members has a pocket into which the winding support insulator is fitted.