CN202221691U - Resin pouring three-dimensional rolled iron core amorphous alloy dry type transformer - Google Patents

Abstract

The utility model discloses a resin pouring three-dimensional wound iron core amorphous alloy dry-type transformer, which belongs to the technical field of electric equipment. The non-encapsulated three-dimensional wound iron core amorphous alloy dry-type transformer is mainly reflected in the fact that the amorphous alloy iron core of this type of transformer is a three-dimensional structure, and the three lower iron yokes of the three-dimensional wound iron core are located on the lower clamp and welded On the base, the upper clamp and the lower clamp are connected by a compression screw. The low-voltage coil is a circular foil wound or cylindrical structure. The high-voltage coil is wound with oxygen-free copper wire wrapped in NOMEX paper material and vacuum pressure impregnated. And combined with the upper block and the lower block to support and compress the high and low voltage coils, so that the product structure forms a three-dimensional rigid frame structure.

Description

Resin Casting Stereo Wound Core Amorphous Alloy Dry Type Transformer

technical field

The utility model belongs to the technical field of power equipment, in particular to a non-encapsulated amorphous alloy dry-type transformer with a three-dimensional structure. the

Background technique

The traditional amorphous alloy dry-type transformer has great advantages in energy saving, environmental protection, and operating economy of the transformer. The no-load loss can be reduced by 60% to 70% compared with the 10-type series, and the operating cost is low and the overall benefit is good. However, due to the extremely thin thickness of the amorphous alloy sheet, it is very sensitive to mechanical stress, sensitive to magnetostriction, and has a low saturation flux density. The stem and coil of the amorphous alloy transformer are usually rectangular structures, so the traditional amorphous alloy There are two major disadvantages of the transformer, namely the high noise of the transformer operation and the poor ability to withstand short-circuit. the

Contents of the invention

The object of the present invention is to provide a resin cast three-dimensional wound iron core amorphous alloy dry-type transformer, which can effectively reduce the operating noise of the transformer and improve the anti-short circuit capability of the transformer. the

The present invention is achieved in the following way: a resin cast three-dimensional wound iron core amorphous alloy dry-type transformer, including a clip, an iron core and a coil, the coil is composed of a three-phase coil wound on the iron core column of the iron core, The coils of each phase are composed of high-voltage coils and low-voltage coils; the clamps include upper clamps, lower clamps, upper pressing plates, lower pressing plates and pressing screws; the special feature is that the iron cores are arranged in a ring and phased Three single frames made of adjacent two spliced amorphous alloys, the cross-section of the vertical frame side and the horizontal frame side of the single frame is approximately semicircular or semi-regular polygon; the horizontal frame side of the single frame is an iron yoke, adjacent The mullions of the two single frames are connected to form an iron core column, and the cross section of the iron core column is approximately circular or regular polygonal;

The lower pressing plate is fixedly connected with the base fixed on the lower clamp through the support rod, and the upper and lower pressing plates cooperate with the pressing screw; the upper pressing plate is located in the upper space of the iron core, and the lower pressing plate is located in the lower space of the iron core;

The iron yoke at the upper end of the iron core is arranged between one side of the upper clamp and one side of the upper clamp, and the iron yoke at the lower end of the iron core is arranged on the base between the lower clamp and the lower clamp;

The high-voltage coil and the low-voltage coil are arranged on the stem, and the upper and lower clamps clamp the high-voltage coil and the low-voltage coil;

It also includes an upper block and a lower block;

The two ends of the high-voltage coil and the low-voltage coil are respectively provided with an upper pad and a lower pad; the lower clamp and the lower pressure plate support the lower pad, and the upper clamp and the upper pressure plate press the upper pad.

The resin-cast three-dimensional wound core amorphous alloy dry-type transformer is special in that: the low-voltage coil is a foil-wound or wire-wound cylindrical structure, and the end insulation is sealed with a resin mixture. the

The high-voltage coil adopts a segmented cylindrical structure, and the entire coil conductor is encapsulated by a solid insulating layer of epoxy resin. the

The resin cast three-dimensional wound iron core amorphous alloy dry-type transformer is special in that: the three terminals of the high-voltage coil and the four terminals of the low-voltage coil are respectively arranged on the upper clamp on the opposite side of the transformer. on the mounting bracket of the component. the

The special feature of the resin cast three-dimensional wound iron core amorphous alloy dry-type transformer is that an elastic insulating pad is arranged between the iron yoke and the base. the

The invention discloses a resin cast three-dimensional wound iron core amorphous alloy dry-type transformer. advantage. The iron core of the resin cast three-dimensional wound core amorphous alloy dry-type transformer is a three-dimensional wound core structure. The iron core is sequentially rolled from several trapezoidal amorphous alloy strips to form a single frame shape with a semicircular cross-section. Two horizontal Single frames with a semicircular section can be combined into an approximately circular stem section. The amorphous alloy sheets are tightly rolled, the magnetic conduction direction of the amorphous alloy is exactly the same as the magnetic circuit direction of the iron core, and the vibration is small during operation, which can not only solve the noise caused by the incoherent magnetic circuit of the stacked iron core, but also Avoid the high energy consumption and weak areas of the iron core formed by the disassembly and assembly of the traditional amorphous alloy iron core, and the three-dimensional amorphous alloy iron core can save amorphous alloy materials to a large extent, reduce the weight of the iron core, and can further reduce The no-load loss and no-load current of transformer operation. The coil of the resin-cast three-dimensional wound core amorphous alloy dry-type transformer can be made into a standard circular structure, so the force on the circumference of the coil conductor will be uniform, and the short-circuit resistance of this type of transformer will be greatly improved. the

Description of drawings

Fig. 1 is a perspective view of the present invention. the

Fig. 2 is a perspective view of the clip of the present invention. the

Fig. 3 is a perspective view of the iron core of the present invention. the

Fig. 4 is an assembly diagram of the clip and the iron core of the present invention. the

Fig. 5 is a perspective view of the low-voltage foil-wound coil of the present invention. the

Fig. 6 is a perspective view of the high voltage coil of the present invention. the

Detailed ways

The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but this does not constitute any limitation to the present invention. the

As shown in Figure 1, Figure 2, and Figure 3, a non-encapsulated three-dimensional wound iron core amorphous alloy dry-type transformer includes a clip, an iron core 1 and a coil, and the coil is composed of an iron core wound on the iron core 1 The three-phase coils on the column are composed of a high-voltage coil 2 and a low-voltage coil 3 for each phase. the

As shown in FIG. 2 , the clamp includes an upper clamp 4 , a lower clamp 5 , an upper pressing plate 61 , a lower pressing plate 62 and a compression screw 7 . the

As shown in FIG. 3 , the iron core 1 includes three single frames 8 arranged in a ring and made of adjacent two spliced amorphous alloys. Approximate semicircle, also can be semi-regular polygon; The horizontal frame edge 82 of single frame 8 is iron yoke, the vertical edge of adjacent two single frames 8 is connected to form iron core post, and the section of iron core post is approximately circular , can also be a regular polygon;

As shown in Figure 2, the lower pressing plate 62 is fixedly connected to the base 63 fixed on the lower clamp 5 through the support rod, and the upper and lower pressing plates 61, 62 cooperate with the pressing screw 7; the upper pressing plate 61 is located in the upper space of the iron core 1, The lower pressing plate 62 is located in the lower space of the iron core 1; in FIG. 2, 51 is the part supporting the lower block 10; 41 is the part for pressing the upper block.

The iron yoke at the upper end of the iron core 1 is arranged between one side of the upper clamp 61 and one clamp edge of the upper clamp 4, and the iron yoke at the lower end of the iron core 1 is arranged at the base between the lower clamp 62 and the lower clamp 5. On the seat 63; a shock absorbing device is arranged between the iron yoke and the base 63, and the shock absorbing device is an elastic insulating pad. With such a structure, the iron core 1 is no longer affected by other redundant radial forces. the

The high-voltage coil 2 and the low-voltage coil 3 are arranged on the stem, and the upper and lower clamps 4, 5 clamp the high-voltage coil 2 and the low-voltage coil 3;

It also includes an upper block and a lower block;

The two ends of the high-voltage coil 2 and the low-voltage coil 3 are respectively provided with an upper pad 9 and a lower pad 10; the lower clamp 5 and the lower pressure plate 62 support the lower pad 10, and the upper clamp 4 and the upper pressure plate 61 press the upper pad 9.

As shown in FIG. 5 , the low-voltage coil 3 is a foil-wound or wire-wound cylindrical structure, and the end insulation is sealed with a resin mixture. the

As shown in FIG. 6 , the high-voltage coil 2 adopts a segmented cylindrical structure, and the entire coil conductor is encapsulated by a solid insulating layer of epoxy resin. The high-voltage coil is poured with resin, and the conductor and the resin insulation layer form a complete rigid body with good mechanical strength. the

The coil with a circular structure can give full play to the advantages of its structure, so that the conductor is evenly stressed on the circumference, overcoming the shortcomings of conductor stress concentration and poor mechanical strength caused by the traditional amorphous alloy transformer coil with a rectangular structure, and greatly improving Short-circuit resistance of amorphous alloy dry-type transformers. In addition, the circular coil does not require additional tooling equipment during the winding process, which can more easily ensure the coil winding size and beautiful appearance. It also avoids the insulation damage of the conductor caused by multiple strikes of the wooden hammer,

The three terminals 21, 22, 23 of the high-voltage coil 2 and the four terminals 31, 32, 33, 34 of the low-voltage coil 3 are respectively arranged on the mounting frame 11 of the upper clamp 4 on the opposite side of the transformer.

What has been described above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, some improvements and modifications can be made without departing from the principle of the present invention, which are also regarded as the protection scope of the present invention. the

Claims (4)

1. the three-dimensional volume of a resin-cast iron core amorphous alloy dry-type transformer comprises folder, iron core and coil, and said coil is made up of the three-phase coil on the iron core column of iron core, and each phase coil is made up of high-tension coil and low-voltage coil; Said folder comprises upper clamping piece, lower clamping piece, top board, lower platen and clamping screw; It is characterized in that: said iron core comprises three single frames that the non-crystaline amorphous metal of circular array and adjacent two fixed connections is processed, and the munnion limit of single frame and the cross section of transverse frame edge are approximate half-circular or half regular polygon; The transverse frame edge of single frame is the iron yoke, constitutes iron core column after the munnion limit amalgamation of adjacent two single frames, and the cross section of iron core column is sub-circular or regular polygon;

Lower platen is fixedly connected with pedestal on being fixed on lower clamping piece through support bar, and upper and lower pressing plate cooperates with clamping screw; Top board is positioned at the space on iron core top, and lower platen is positioned at the lower space of iron core;

The iron yoke of the upper end of iron core is arranged between the folder limit of top board one side and upper clamping piece, and the iron yoke of the lower end of iron core is arranged on the pedestal between lower platen and the lower clamping piece;

Said high-tension coil and low-voltage coil are arranged on the stem, and upper and lower folder clamps high-tension coil and low-voltage coil;

Also comprise cushion block and lower cushion block on one;

The two ends of high-tension coil and low-voltage coil are respectively arranged with cushion block and lower cushion block; Lower clamping piece and lower platen support lower cushion block, and upper clamping piece and top board compress cushion block.

2. the three-dimensional volume of resin-cast according to claim 1 iron core amorphous alloy dry-type transformer is characterized in that: said low-voltage coil be paper tinsel around or the wire-wound cylinder mode, the resin seal is used in the end insulation;

Said high-tension coil adopts subsection cylindrical formula structure, and the whole winding conductor is all sealed by the solid insulating layer of epoxy resin.

3. according to claim 1 or the three-dimensional volume of 2 described resin-casts iron core amorphous alloy dry-type transformers, it is characterized in that: three binding posts of said high-tension coil and four binding posts of low-voltage coil are arranged respectively on the installing rack of upper clamping piece of the opposite side that is located at transformer.

4. the three-dimensional volume of resin-cast according to claim 1 and 2 iron core amorphous alloy dry-type transformer is characterized in that: be provided with elastic insulated pad between said iron yoke and the pedestal.

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