JPS6018906A - Wound core type transformer - Google Patents

Abstract

PURPOSE:To improve rigidity and magnetic characteristics of a wound core by providing a reinforcing member for holding the core and windings and holding a clamp member for clamping and fixing the core with the reinforcing member to prevent the core from being applied with self-weight thereof. CONSTITUTION:Amorphous magnetic alloy thin belts are wound to construct a wound core 11, of which legs 11a and 11b are held with leg holding members 13a and 13b from the both sides. A winding 21 wound up on the wound core 11 is held with a winding holding member 14 from the upper side. A reinforcing member 13 for the wound core 11 is composed of the leg holding members 13a and 13b and the winding holding member 14. Furthermore, there are provided an upper clamp 16 for fixing an upper yoke member 11c of the wound core 11 from the both sides and a lower clamp 20 for fixing a lower yoke member 11d from the both sides. The upper clamp 16 is held with the reinforcing member 13 and the lower clamp 20 is fixed at a transformer tank, thereby improving rigidity and magnetic characteristics of the core 11 without being applied with self- weight of the wound core 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a transformer equipped with a wound core wound with an amorphous magnetic alloy ribbon.

[Technical background of the invention and its problems]

A wound core used in a wound core type transformer has conventionally been manufactured by winding a grain-oriented silicon steel plate into the shape shown in FIGS. 1 and 2. Figure 1 shows a C-cut core type wound core 1 that is divided into two parts at the leg, and Figure 2 shows a one-turn cut core type wound core 2 that is assembled by cutting each turn of the wound material. It shows. Then, as shown in Fig. 3, the wound core 1
, 2, and the winding 3 is attached to the legs of the transformer.

The silicon button plate used in conventional wound cores has a thickness of 0.3~0.
, 35. tnm has sufficient rigidity by itself, the wound core can be easily assembled, and the winding can be held by the core itself to provide a rigid structure.

On the other hand, amorphous magnetic alloy ribbons recently produced by the melt quenching method contain metal elements (Fe, 'Co').

N1, etc.) and semimetallic elements (B, 'CX5t, etc.), and has excellent magnetic properties with significantly lower iron loss and excitation current than conventional silicon value plates, making it an advantageous iron core. It is attracting attention as a material.

However, since the amorphous magnetic alloy ribbon is manufactured by an ultra-quenching method, its thickness is usually 10 μm or less.

For this reason, when a wound core is constructed using an amorphous magnetic alloy ribbon, there is a problem in that since the ribbon is very thin, the core has low rigidity and easily loses its shape. Furthermore, when a compressive load is applied to the amorphous magnetic alloy ribbon in the thickness direction, the iron loss, which is an important factor in magnetic properties, increases by about 5 inches. Even when a wound core is manufactured from an amorphous magnetic alloy ribbon, windings are attached to the wound core in the same way as in the past, so the load is applied to the wound core as a compressive load. In other words, in the structure of the transformer contents in a conventional wound core type transformer, the self weight of the winding and the load of the winding are applied, so the iron loss of the amorphous magnetic alloy ribbon that makes up the wound core increases, and the There is a problem in that it is difficult to assemble an iron core while maintaining the excellent magnetic properties of the crystalline magnetic material.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and is equipped with a wound core wound with an amorphous magnetic alloy ribbon, which increases the rigidity of this wound core, reduces the load burden, and improves magnetic properties. The present invention provides a wound iron core type transformer.

[Invention of invention]

The wound core type transformer of the present invention has a leg presser that presses the legs of the wound core, and a reinforcing member that supports the winding support PI3 that supports the winding from below, which are attached to the wound core to increase rigidity. At the same time, make sure that no wire load is applied to the winding core, and then lift the silica iron part of the winding core; In addition to supporting it, this tightening tool is also held with a yuzu strong feather to prevent its own weight from being applied to the wound iron core.

[Embodiments of the invention]

Hereinafter, an embodiment will be described in which the wood ring 1 is shown in the drawings.

Figures 4 to 8 show an embodiment of the present invention, with Figure 4 being a front view of the contents of the beam E-pressure vessel, Figure 5 being a side view of the same, Figure 6 being a partially cutaway side view of the same, and Figure 7 being a partially cutaway side view of the same. Reinforcement member diagram, 8A8
The figure is a perspective view of the upper fastener.

In the figure, reference numeral 11 indicates a wound core in which an amorphous magnetic alloy ribbon is wound.
and a lower silicate part lid. The wound core 11 is of either the C-cut core type shown in FIG. 1 or the one-turn cut core type shown in FIG. 2.

In the figure, reference numeral 12 denotes reinforcing members made of plates provided on both sides of each leg portion 11a and Jlb of the wound core 11, respectively. As shown in FIG. 7, this reinforcing member 12 has a first portion 13a which has a height equal to that of the wound core 11 and abuts on the side surfaces of the legs 11&, llb in the vertical direction, and this first portion 13a. The leg portion 11a is continuously formed in a direction perpendicular to the portion 13a of 1.
, llb abuts against the side surface of the iron core window along the vertical direction.
The leg presser 13 consists of the portion 13b, and the leg presser 1
A leg portion 11a, ll is attached to the lower part of the first portion 13a at 3.
The winding supporting part 14 is fixed by welding or the like in a horizontal state facing opposite to the winding part 11b, and abuts on the lower surface of the winding 21 mounted on the legs 11a and 11b. Note that the leg portions 11a are provided at the upper and lower end portions of the first portion 13a of the leg presser portion 13.

Bosses 15 are fixed to the side surface and the opposite side of 11b by welding or the like. Further, the lower end of the first portion 13a projects downward (from the lower surface of the lower silicate portion 11d of the wound core 1). This reinforcing part 12 is the leg part 1 of the wound core 11.
The legs 11b are disposed opposite to both sides of the leg 1a.
The reinforcing members 12 are arranged facing each other on both sides of the reinforcing members 12, and are fixed by binding the joints 11m and 11bK with tape such as glass fiber tape. In the figure, reference numeral 16 denotes a pair of upper fasteners provided on both sides of the upper silicate part 11c of the wound core 11. As shown in FIG. The upper silicate part 11 has a part that abuts along the horizontal direction and a part that covers the upper part.
It has a long length. On the lower side of the upper fastener 16, a silicate support part 17 is formed along the horizontal direction, which contacts the lower side of the upper silicate part 11c of the wound core 11, that is, the side surface of the core window. Note that boss holes 16a are formed at both ends of the upper fastener 16, respectively. The upper fasteners 16 are disposed on both sides of the upper silicate part 11c, and both ends of each upper fastener 16 extending from both ends of the upper silicate part 11e and facing each other are connected to a delt 18 and a nut 19. The tightening is fixed. Therefore, the upper fastener 16 tightens and fixes the upper silicate part 11'c from both sides. Note that a groove 15 is provided at the upper end of the first portion 13a of the presser part 13.
Is the upper fastener 16? It engages with the slot 16a. 20 in the diagram
A pair of lower clamping tools are provided on both sides of the lower silicate part 11a of the wound core 11, and these have a part that abuts the side surface of the lower silicate part lid in the horizontal direction, and a part that covers the lower side. It has a longer length than the lower silicate portion 11d. Screw holes 20a are formed at both ends of the lower fastener 20, respectively. The lower fasteners 20 are provided on both sides of the lower silicate part 11d, and are provided at both ends of each lower fastener 20 protruding from both ends of the lower silicate part 11d. The tightening is fixed by a bolt 18 and a nut 19. Therefore, the lower fastener 20 tightens and fixes the lower silicate portion 11d from both sides.

A goss 15 provided at the lower end of the first portion 13h of the presser section 13 is engaged with the death hole 20a of the T-section fastening tool 20. Here, the lower part of the lower fastener 20 is the lower silicate part lid.
It protrudes downward from the bottom surface and is fixed to the bottom wall of the transformer tank (not shown). Note that the reinforcing member 12O leg holding part 13 and the lower fastener 20 protrude downward from the lower iron part fed of the wound core 11 to hold the wound core 11, so that the wound core 11 has a gap from the bottom wall of the transformer tank. and are held at a distance.

In the figure, reference numerals 21 indicate windings attached to the leg portions 11a and llb of the wound core 11, respectively. The windings 21 are supported by winding support portions 15 of each reinforcing member 12 via insulators 22. Note that 23 in the figure is a member that presses down the winding 21 from above.

Therefore, in the inside of the transformer, the reinforcing member 12 is attached to the wound core 1, and the reinforcing member 12 and the upper fastener 16
and a lower fastener 20 are mechanically coupled. The pressing portion 13 of each reinforcing member 12 is the leg portion 11a of the wound core 11.

Since it surrounds 11b and presses it from the side, the leg IVIL
, llb are reinforced to increase their rigidity. Therefore, the shape of the wound core 11 does not collapse and can maintain a predetermined shape.

Since the winding support part 14 of the reinforcing member 12 supports the winding 21 from below, the structure is such that the load of the winding 21 attached to the legs 11a and llb is not applied to the legs 11a and llb of the wound core 11. There is. In addition, the silica support portion 1 of the upper fastener 16
7 abuts and supports the upper silicate portion 11c of the wound core 11 from below, and the reinforcing member 12 holds the upper fastener 16, so that the wound core 11 can be held in a so-called hanging state.

That is, the wound core 11 is held in a rigid state by applying its own weight to the leg portions 11a and llb. Therefore, an increase in iron loss due to the load applied to the wound core 11 by its own weight or the winding 21 does not occur.

Fig. 9 shows another embodiment, and the same part 1 as Fig. 6.
d: Concave - indicates the sign. In this embodiment, the reinforcing member 1
The lower end of the first portion 13a of the presser part 13 in 2 is
The lower silicate part 11d of the wound core 11 protrudes downward from the lower part 11 and has a force. Then, the reinforcing member 12 and the lower clamping tool 2 are attached so that the wound core 11 is held in a state where the lower surface of the lower opening part lid is spaced apart from the bottom wall of the transformer tank with a spacing.
The connection dimension relationship with 0 is set. In this way, the core 11 can be held in a hanging shape.

[Efficacy of invention]

As explained above, the iron-core transformer of the present invention is formed by enhancing the li:jlj properties of the wound iron core made of the amorphous magnetic alloy 'I' by the reinforcing member and the iron core fastener. In addition to preventing misalignment, it is possible to prevent deterioration of magnetic properties by making it easier to apply load to the wound core.

[Brief explanation of the drawing]

11: ≧1 to U Figure 3 shows a conventional example, Figures 1 and 2 are perspective views showing the wound core, Figure 3 is a front view showing the contents of the transformer, and Figures 4 to 8. The drawings show one embodiment of the present invention, and FIG. 4 is a front view showing the contents of the transformer, FIG. 5 is a side view of the same, FIG. 6 is a partially cutaway side view of the same, and FIG. 7 is a perspective view showing a reinforcing member. 8 is a perspective view showing the upper fastener, and FIG. 9 is a partially cutaway side view of the contents of the transformer showing another embodiment. 1.2...Wound core, 3...Wound wire, 11...Wound core, 11a, 1 lb-leg, 11c, 11
d - Silica iron part, 12... Reinforcement member, 13... Pressing part, 14... Winding support part, 15... Boss, 16
... Upper fastener, 17... Silica iron support part, 20...
・Lower fastener, 2nd wire...Winding, 22...Insulator. Applicant's agent Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 7 Figure 15 Figure 8 Figure 9 Commissioner of the Japan Patent Office Kazuo Wakasugi 1. Indication of Case Patent Application No. 126681/1989 38 Amendment Patent applicant (307) Tokyo Shibaura Electric Co., Ltd. 2 Company 4, Agent 7, Dispute over amended statement of contents (no change in content) 33-

Claims (1)

[Claims] A wound core formed by winding an amorphous magnetic alloy thin strip, a pressing part that presses down the legs of the wound core from the side, and a winding support part that supports the windings wound around the legs from below. a reinforcing member that is attached to the wound core; and a fastener that has a silicate support portion that supports the upper silicate iron portion of the wound core from below and that fixes the upper silicate portion from both sides; A wound core type transformer in which the fastener is held by the reinforcing member. −