JPH04107816U - stationary induction electrical equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent fragments of the amorphous magnetic alloy that constitutes the wound core from leaking out. [Structure] Protective strips are attached to the inner and outer peripheries of the wound core 1, respectively. Sheet-shaped insulators 2 are wound around the legs 1a, 1b and yoke parts 1c, 1d of the wound core 1, respectively. With a part wrapped in the sheet-like insulator 2,
A corner covering insulator 4 is placed on the laminated surface of each corner of the wound core 1, and each corner covering insulator 4 is adhered to the laminated surface of each corner.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a static induction electric current for transformers etc. that uses a wound core made of amorphous magnetic alloy ribbon. It is related to air equipment.

0002

[Conventional technology]

Wound cores made of amorphous magnetic alloys become extremely brittle when annealed, so they cannot be used in electric machines. If a strong impact is applied during or after the device is assembled, the iron core may chip and become non-functional. Fragments of crystalline magnetic alloy ribbons (hereinafter simply referred to as ribbons) are likely to occur. In the unlikely event that amorphous magnetism If fragments of the thin alloy ribbon float in the insulating oil, there is a risk of dielectric breakdown in electrical equipment. be.

0003 Therefore, in static induction electrical equipment using a wound core made of amorphous magnetic alloy ribbon, , the wound core is covered with a protective cover to prevent any fragments of the ribbon from leaking outside. It has been proposed to cover the

0004 The applicant previously filed Utility Application No. 18450/1983 (Kokai No. 123315/1999). Place the insulating paper cut out in the specified shape along the edge of the core like origami. Bend it to form a protective cover that covers each part of the core, and glue the protective cover. We proposed a wound core transformer that is fixed to the core with adhesive or adhesive tape. Ta.

[0005]

[Problem that the idea aims to solve]

Fold insulating paper cut into a specified shape to form a protective cover that covers the wound core. Conventional transformers have the following problems.

[0006] (a) It is necessary to prepare many types of protective covers to suit the shape of each part of the core. Preparation and management of the parts were complicated.

[0007] (b) The insulating paper that forms each protective cover has a complicated shape, making it difficult to manufacture. Met.

[0008] (c) The work of folding the insulating paper along the edge of the iron core is extremely troublesome. Therefore, installing the protective cover required a lot of effort.

[0009] The purpose of this invention is to prevent fragments of the amorphous magnetic alloy ribbon from leaking outside. To provide a stationary induction electric device that allows easy processing of It is in.

0010

[Means to solve the problem]

This invention consists of an amorphous magnetic alloy thin strip that spans between a pair of legs and both legs. The boundary between each yoke and the leg is a curved cord. Wound around the almost rectangular wound core and at least one leg of the wound core. In static induction electrical equipment with coiled windings, fragments of the ribbon may leak out. This is to ensure that there is no confusion.

[0011] Therefore, in this invention, it is necessary to maintain the wound core along the inner and outer circumferential surfaces. A protective strip is provided, and each leg and yoke of the wound core is wrapped around each leg and yoke. Cover with an insulated sheet of insulation.

0012 In addition, a corner covering insulator is provided to cover the laminated surface of each corner of the wound core. Laminate the corner part of the covering insulator with part of it wrapped in the sheet insulator. Adheres to surfaces and sheet-like insulators.

[0013]

[Effect]

With the above configuration, each sheet-like insulator has straight leg parts and yoke parts. All you have to do is wrap it around the iron core and fix it to the core with adhesive or adhesive tape. The shape of the insulator may be a simple rectangle, and its manufacture is simple. This sea again Since the strip-shaped insulator can be attached to the core simply by wrapping it, its installation The work is easy.

[0014] Furthermore, the insulating material covering each corner of the wound core does not need to be bent, and is simply placed on the laminated surface. It is easy to manufacture because it can be in the form of a flat plate. In addition, corner coating The laminated surface and sheet insulation material are partially overlapped on top of the sheet insulation material. It is easy to install because it just needs to be glued to an object.

[0015]

【Example】

Fig. 1 shows a transformer according to an embodiment of the present invention, and Fig. 2 shows a rectangular wound core used in the embodiment. The state before the winding is installed is shown.

[0016] In Fig. 1, 1 is a wound core, and as seen in Fig. 3, this wound core 1 is made of amorphous material. A pair of legs 1a and 1b made of magnetic alloy ribbon and extending linearly, and both legs. It has a pair of yoke parts 1c and 1d extending linearly between the leg part 1a and the joints on both sides thereof. The boundary between the iron parts 1c and 1d, and the leg part 1b and the yoke parts 1c and 1d on both sides thereof. The boundaries between them are curved corners C1, C2 and C3, C4, respectively. Ru. One yoke 1d of this wound core has a separable lap joint. J is provided. In addition, if a protective strip is attached after annealing, the protective strip An insulating material such as kraft paper can also be used as the strip.

[0017] Although not shown separately in the figure, the inner and outer peripheral surfaces of the wound core are A protective strip is provided in addition to the core, and the protective strip protects the inner peripheral surface of the core and The outer peripheral surface is protected. This protective strip can be made of stainless steel, for example. Steel ribbon is suitable.

[0018] In the present invention, after the wound core 1 is formed into a rectangular shape and annealed, the wound iron core is joined. Straight line parts other than the yoke part 1d where the parts are provided, that is, the leg parts 1a and 1b and the yoke part Wrap a rectangular sheet-like insulating material 2 made of kraft paper or the like around each c, and Each straight line portion is covered with a border 2.

[0019] FIG. 3 shows the state in the middle of winding the sheet-like insulator 2. In this example, , Wrap one turn of sheet insulator 2 around each straight part, and wrap both ends with a predetermined overlap margin. The wrapped portion is fixed with adhesive tape 3.

[0020] In this way, the leg parts 1a, 1b and the yoke part 1c are covered with the sheet-like insulator 2. After that, the laminated surfaces of the corner parts C1 and C3 between the yoke part 1c and the legs 1a and 1b are A corner covering insulator 4 made of insulating paper such as kraft paper is attached to cover the corner.

[0021] The corner covering insulator 4 is initially shaped into a rectangular or square shape as shown in FIG. I'll make it happen. As shown in Figure 5, the outer and inner peripheries of corner portions C1 and C3 , covering both ends of the sheet-like insulator 2 covering the yoke part 1c and the leg parts 1a and 1b. The adhesive 5 is applied to each end of the sheet-like insulator 2, and the corner-coated insulator is 4 onto the adhesive 5 and partially wrapped in the sheet-like insulator 2. Adhere to the laminated surface of each corner. After the adhesive has hardened, it is removed from the iron core of insulator 2. Cut out the protruding part to create the state shown in Figure 4.

[0022] Epoxy resin-based adhesives are suitable as adhesives, but insulators should not be If it can be removed, it has excellent oil resistance (but only when used in oil). Apply solvent diluted adhesive.

[0023] As shown in FIG. 4, the leg parts 1a, 1b and the yoke part 1c are covered with a sheet-like insulator 2. After covering the laminated surfaces of the corner portions C1 and C3 with the corner covering insulator 4, as shown in FIG. As shown in FIG. Enter. This first frame member 6A is formed into a deep U-shape, and its open end Band plates 6a, 6a are welded to the inside. As shown in FIG. 1, the leg portions 1a of the iron core 1, After attaching the windings 7 and 8 to 1b, the second frame member 6B is attached to the first frame member 6A. The frame body 6 is constructed by the first frame member 6A and the second frame member 6B. The second frame member 6B is formed in a shallow U-shape along the inner periphery of the yoke portion 1d. Both frame members are placed in a state where the opening end of the second frame member 6B is abutted against the band plates 6a, 6a. are combined to form the frame 6.

[0024] The windings 7 and 8 are attached to the yoke part 1 after the first frame member 6A is attached as shown in FIG. Open the joint J of d and fit it onto the legs 1a and 1b. After fitting the windings 7 and 8, Close the joint J again and cover the yoke part 1d with the sheet-like insulator 2 as shown in Fig. 1. Then, glue the corner covering insulator 4 on the laminated surfaces of the corner parts C2 and C4 and cover the laminated surfaces. Cover.

[0025] With the above structure, the laminated surface of the amorphous magnetic alloy ribbon is formed by the sheet-like insulator 2 and and corner insulation 4. The outer periphery of each corner of the wound core The outer and inner circumferential sides of the wound core are not covered with insulators, but the outer and inner circumferential sides of the wound core are covered with protective strips. Covered by trip. Therefore, when configured as above, an amorphous magnetic alloy The ribbon will be completely covered by the insulation and protective strip, preventing the ribbon from breaking. This can prevent pieces from leaking outside.

[0026] In the above embodiment, the sheet-like insulator 2 is fixed with adhesive tape 3, but The overlapped portions of both ends of the sheet-like insulator 2 are bonded with adhesive. It's okay.

[0027] In the above embodiment, the windings are fitted to both the legs 1a and 1b, but only one leg Of course, the present invention can also be applied to the case where the winding is fitted only in the section.

[0028]

[Effect of the idea]

As described above, according to the present invention, each sheet-like insulator has each linear leg portion and Just wrap it around the yoke and fix it to the core with adhesive or adhesive tape. Therefore, it can be easily installed. In addition, the shape of the sheet-like insulator is simple. It is easy to manufacture because it can be of rectangular shape. In addition, there is a The edges do not need to be folded; they can simply be in the form of a flat plate that follows the laminated surface. , its manufacture is easy, and its installation is also simple.

[0029] Therefore, according to the present invention, the amorphous magnetic alloy ribbon can remain stationary without leaking fragments. It has the advantage of being able to provide induction electric equipment at low cost.

[Brief explanation of drawings]

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

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

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

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

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

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

[Explanation of symbols]

1...Wound core, 1a, 1b...Legs, 1c, 1d...Yoke parts,
C1 to C4... Corner part, 2... Sheet-like insulator, 3... Adhesive tape, 4... Corner covering insulator, 5... Adhesive, 7, 8...
winding.

Claims (1)

[Scope of utility model registration request] Claim 1: The yoke is made of an amorphous magnetic alloy ribbon and has a pair of legs and a pair of yoke parts provided across both legs, each yoke part and the leg. In a stationary induction electric device comprising a substantially rectangular wound core having a curved corner at the boundary with the wound core, and a winding wound around at least one leg of the wound core, the winding Protective strips are provided along the inner and outer peripheral surfaces of the core, and each leg and yoke of the wound core is covered with a sheet-like insulating material wrapped around each leg and yoke of the wound core. The laminated surface of each corner portion is arranged so as to partially wrap around the end of the sheet-like insulating material, and is bonded to the outer and inner peripheral parts of the laminated surface and the end of the sheet-like insulating material. A stationary induction electrical device characterized by being covered with a corner covering insulator.