JP2539518Y2 - Stationary induction electrical equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stationary induction electric device such as a transformer using a wound core made of an amorphous magnetic alloy ribbon.

[0002]

2. Description of the Related Art Since a wound iron core made of an amorphous magnetic alloy becomes very fragile due to annealing, the iron core is chipped when a strong impact is applied during the assembly of electric equipment or after completion, and the amorphous magnetic core is removed. Alloy ribbon (hereinafter simply referred to as ribbon)
Fragments easily occur. If fragments of the amorphous magnetic alloy ribbon float in the insulating oil, there is a possibility of causing dielectric breakdown of electric equipment.

[0003] Therefore, in a stationary induction electric device using a wound core made of an amorphous magnetic alloy ribbon, the wound core is covered with a protective cover so that even if fragments of the ribbon are generated, they do not leak out. It has been proposed to.

[0004] The present applicant has previously filed Japanese Utility Model Application No. 63-18450.
No. 1-123315, the insulating paper cut into a predetermined shape is folded like an origami along the edge of the wound iron core to form a protective cover covering each part of the iron core. Core transformer fixed to the iron core with adhesive or adhesive tape.

[0005]

A conventional transformer in which a protective cover for covering a wound core is formed by bending insulating paper cut into a predetermined shape has the following problems.

(A) Since it is necessary to prepare various kinds of protective covers according to the shape of each part of the iron core, the preparation and management of the members are complicated.

(B) Since the insulating paper forming each protective cover has a complicated shape, its production is troublesome.

(C) Since the work of bending the insulating paper along the edge of the iron core is very troublesome, mounting the protective cover requires a lot of work.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stationary induction electric device which can easily perform a process for preventing fragments of an amorphous magnetic alloy ribbon from leaking outside. is there.

[0010]

According to the present invention, the present invention comprises a pair of legs and a pair of yoke portions provided between the two legs. A stationary portion including a substantially rectangular wound core having a curved corner at the boundary between each yoke and the leg, and a winding wound on at least one leg of the wound core. In an induction electrical device, a thin strip is prevented from leaking outside.

Therefore, in the present invention, protective strips are provided along the inner peripheral surface and the outer peripheral surface of the wound iron core, respectively, and each leg and the yoke of the wound iron core are wound around the sheet. It is covered with an insulator.

A corner covering insulator is provided to cover the laminating surface of each corner of the wound core, and the corner covering insulator is partially wrapped around the sheet-like insulator. And to the sheet-like insulator.

[0013]

With the above construction, each sheet-shaped insulator can be wound around each leg and the yoke which are linear and fixed to the iron core with an adhesive or an adhesive tape. The shape of the insulator may be a simple rectangular shape, and its manufacture is simple. Further, since the sheet-like insulator can be attached to the iron core simply by being wound, the mounting operation is simple.

Further, the insulator covering each corner portion of the wound iron core does not need to be bent, and may be simply a flat plate along the lamination surface, so that its manufacture is easy. The insulator for covering the corner portion is simply attached to the laminated surface and the sheet-shaped insulator in a state where a part of the insulator is covered on the sheet-shaped insulator, so that the attachment is simple.

[0015]

FIG. 1 shows a transformer according to an embodiment of the present invention, and FIG.
Shows a state before the winding of the rectangular wound core used in the embodiment.

In FIG. 1, reference numeral 1 denotes a wound iron core.
As shown in FIG. 3, a pair of legs 1a and 1b formed of an amorphous magnetic alloy ribbon and extending linearly, and a pair of yokes extending linearly between both legs. 1c, 1d, and the boundary between the leg 1a and the yoke 1c, 1d on both sides thereof, and the boundary between the leg 1b and the yoke 1c, 1d on both sides thereof are respectively The curved corners are C1, C2 and C3, C4. One yoke 1 of this core
d is provided with a separable lap joint J. When a protective strip is attached after annealing, an insulating material such as kraft paper can be used as the protective strip.

Although not particularly distinguished in the drawing, protective strips are provided along the inner peripheral surface and the outer peripheral surface of the wound iron core, respectively, and the protective strips serve to define the inner peripheral surface and the outer peripheral surface of the iron core. Protection is provided. As this protective strip, for example, a thin strip of stainless steel is suitable.

In the present invention, after the wound core 1 is formed into a rectangular shape and annealed, straight portions other than the yoke portion 1d provided with the joint portion of the wound core, that is, the legs 1a, 1b and the joints are provided. A rectangular sheet-shaped insulator 2 made of kraft paper or the like is wound around the iron portion 1c, and each linear portion is covered with the insulator 2.

FIG. 3 shows a state in which the sheet-like insulator 2 is being wound around. In this example, the sheet-like insulator 2 is wound around each linear portion by one turn, and both ends thereof are overlapped by a predetermined overlap margin. , And the wrapped portion is fixed with an adhesive tape 3.

Thus, the legs 1a, 1b and the yoke 1
c is covered with a sheet-shaped insulator 2, and then a corner covering insulation made of insulating paper such as kraft paper is provided so as to cover the respective laminated surfaces of the corner portions C1 and C3 between the yoke portion 1c and the legs 1a and 1b. Attach thing 4.

The corner-coated insulator 4 is first formed in a rectangular or square shape as shown in FIG. As shown in FIG. 5, the outer and inner peripheries of the corners C1 and C3, both ends of the sheet insulator 2 covering the yoke 1c, and the sheet insulator covering the legs 1a and 1b. An adhesive 5 is applied to each end of the object 2 and the corner-coated insulator 4 is applied.
Is pressed onto the adhesive 5 and adhered to the lamination surface of each corner in a state where a part of the sheet-like insulator 2 is wrapped.
After the adhesive has hardened, the portion of the insulator 2 protruding from the iron core is cut off to obtain the state shown in FIG.

As the adhesive, an epoxy resin-based adhesive is suitable, but when it is possible to remove the insulating material after bonding, the oil resistance is excellent (when used in oil). Apply solvent diluted adhesive.

As shown in FIG. 4, the legs 1a and 1b and the yoke 1
c is covered with a sheet-like insulator 2 and the corner portions C1,
After covering the lamination surface of C3 with the corner covering insulator 4,
As shown in FIG. 2, the first frame member 6 </ b> A is inserted into the inner periphery of a portion of the wound core 1 except for the yoke portion 1 d. The first frame member 6A is formed in a deep U-shape, and the strips 6a, 6a are welded to the inside of the opening end. As shown in FIG. 1, after attaching the windings 7 and 8 to the legs 1a and 1b of the iron core 1, respectively, the second frame member 6B is attached to the first frame member 6A, and the first frame member 6A The frame 6 is constituted by the second frame member 6B. The second frame member 6B is formed in a shallow U-shape along the inner circumference of the yoke portion 1d, and the opening end of the second frame member 6B is abutted against the band plates 6a, 6a. The frame body 6 is configured by combining the two frame members.

After attaching the first frame member 6A as shown in FIG. 2, the windings 7, 8 are fitted to the legs 1a, 1b by opening the joint J of the yoke 1d. After the windings 7, 8 have been fitted, the joint J is closed again and the yoke 1d as shown in FIG.
Is covered with a sheet-like insulator 2, and the corner portions C2, C4
The corner covering insulator 4 is adhered to the laminated surface of the above to cover the laminated surface.

With the above configuration, the lamination surface of the amorphous magnetic alloy ribbon is completely covered with the sheet-like insulator 2 and the corner covering insulator 4. The outer and inner peripheral sides of each corner of the wound core are not covered with an insulator, but the outer and inner peripheral parts of the wound core are covered with protective strips. Therefore, with the above configuration, the amorphous magnetic alloy ribbon is completely covered with the insulating material and the protective strip, so that the fragments of the ribbon can be prevented from leaking to the outside.

In the above embodiment, the sheet-like insulator 2 is fixed by the adhesive tape 3.
May be bonded with an adhesive.

In the above embodiment, the windings are fitted to both the legs 1a and 1b. However, the present invention can be applied to the case where the windings are fitted to only one of the legs. It is.

[0028]

[Effects of the Invention] As described above, according to the present invention, each sheet-shaped insulator is wound around each leg and the yoke which are linear and fixed to the iron core with an adhesive or an adhesive tape. The mounting can be performed easily. Further, since the shape of the sheet-like insulator may be a simple rectangular shape, its manufacture is simple. Further, the insulator covering each corner portion of the wound iron core does not need to be bent, and may be simply a flat plate along the lamination surface, so that its manufacture is easy and its installation is also easy.

Therefore, according to the present invention, there is an advantage that it is possible to provide a low-cost static induction machine device in which fragments of the amorphous magnetic alloy ribbon do not leak.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a transformer according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which portions other than a yoke portion having a joint portion and corner portions on both sides thereof are covered with an insulator.

FIG. 3 is a perspective view showing a state in which a sheet-like insulator is attached to an iron core in the embodiment of the present invention.

FIG. 4 is a perspective view showing a state before the core is mounted on the iron core used in the embodiment of the present invention.

FIG. 5 is a perspective view illustrating a state in which an adhesive is applied to a corner of the iron core according to the embodiment of the present invention;

FIG. 6 is a perspective view showing a state in which a corner covering insulator is adhered to a corner portion of the iron core of FIG. 5;

[Explanation of symbols]

1 ... wound iron core, 1a, 1b ... leg, 1c, 1d ... yoke,
C1 to C4: corner portion, 2: sheet-like insulator, 3: adhesive tape, 4: corner-covered insulator, 5, adhesive, 7, 8, ...
Winding.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-68912 (JP, A) JP-A-60-169820 (JP, U) JP-A-1-123315 (JP, U) JP-A 62- 92616 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] The present invention comprises an amorphous magnetic alloy ribbon, a pair of legs, and a pair of yoke portions provided so as to extend between the two leg portions. In a stationary induction electric device including a substantially rectangular wound core whose boundary portion is a curved corner portion and a winding wound around at least one leg of the wound core, Protective strips are provided along the inner and outer peripheral surfaces of the iron core, respectively, and each leg and yoke of the wound iron core are covered with a sheet-like insulator wound around each, respectively. The laminating surface of each corner portion is arranged in a state where a part of the laminating surface is wrapped around the edge of the sheet-like insulator, and is bonded to the outer peripheral portion and the inner peripheral portion of the laminating surface and the edge of the sheet-like insulator. A stationary induction electric device, which is covered with a corner covering insulator.