CN202067642U - Amorphous alloy air-immersed transformer of non-encapsulating three-dimensional winding iron core - Google Patents

Abstract

The utility model discloses a non-encapsulated 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 has 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 winding or cylindrical structure. The high-voltage coil is wound with oxygen-free copper wire wrapped in NOMEX paper material and vacuum pressure impregnated. Combined with the upper block and the lower block to support and compress the high and low voltage coils, the product structure forms a three-dimensional rigid frame structure.

Description

Non-encapsulated three-dimensional 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 non-encapsulated three-dimensional wound 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 non-encapsulated 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 , each phase coil is composed of a high-voltage coil and a low-voltage coil; the clamp includes an upper clamp, a lower clamp, an upper pressing plate, a lower pressing plate and a pressing screw; the special feature is that the iron core includes a circular arrangement and Three single frames made of two adjacent 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, The mullion sides of two adjacent single frames are combined 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 the outer side of the upper pressing plate and the inner 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 pressing plate and the lower clamp; the high voltage coil and The low-voltage coil is set on the iron core column;

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 non-encapsulated three-dimensional wound iron core amorphous alloy dry-type transformer is special in that: the low-voltage coil is a foil-wound or wire-wound cylindrical structure, and NOMEX paper is used for interlayer insulation and end insulation;

The high-voltage coil has a cake structure, and gaskets or comb-shaped stays are used as support for the cake, or the high-voltage coil has a layer structure, and NOMEX paper is used for interlayer insulation.

The special feature of the non-encapsulated three-dimensional wound iron core amorphous alloy dry-type transformer is that the three terminals of the high-voltage coil and the four terminals of the low-voltage coil are respectively arranged on the opposite sides of the transformer. clip mounting bracket. the

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

The present invention is an amorphous alloy dry-type transformer with a non-encapsulated three-dimensional wound iron core. advantage. The iron core of the non-encapsulated three-dimensional wound core amorphous alloy dry-type transformer is a three-dimensional wound core structure. The iron core is sequentially rolled by several trapezoidal amorphous alloy strips to form a single frame shape with a semicircular cross-section. Two Single frames with a semicircular cross 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 this type of 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 core amorphous alloy dry-type transformer includes a clip, an iron core 1 and a coil, and the coil consists 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 clip includes an upper clip 4 , a lower clip 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 polygonal shape; The horizontal frame side 82 of single frame 8 is iron yoke, and the mullion side of adjacent two single frames 8 forms iron core column after splicing, and the section of iron core column is approximately Circular, and can also be a regular polygon;

As shown in Figure 2, the lower pressing plate 62 is fixedly connected with the base 63 fixed on the lower clamping member 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 a part supporting the lower block 10; 41 is a part for pressing the upper block.

The iron yoke at the upper end of the iron core 1 is arranged between the outer side of the upper pressing plate 61 and the inner side 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 pressing plate 62 and the lower clamp 5 63; a shock absorbing device is provided 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 iron core column;

Also includes an upper pad 9 and a lower pad 10;

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 Figure 5, the low-voltage coil 3 is a foil-wound or wire-wound cylindrical structure, and NOMEX paper is used for interlayer insulation and end insulation;

As shown in FIG. 6 , the high-voltage coil 2 has a cake structure, and gaskets or comb-shaped stays are used as support for the cake, or the high-voltage coil has a layer structure, and NOMEX paper is used for interlayer insulation.

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. the

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. A non-encapsulated three-dimensional winding iron core amorphous alloy dry-type transformer, comprising a clamp, an iron core and a coil, the coil is made of a three-phase coil wound on the iron core column of the iron core, and each phase coil is composed of Composed of high-voltage coils and low-voltage coils; the clamp includes an upper clamp, a lower clamp, an upper pressing plate, a lower pressing plate and a pressing screw; it is characterized in that: the iron core includes two non- The cross-sections of the vertical and horizontal frame sides of the single frame are approximately semicircular or semi-regular polygonal; the horizontal frame side of the single frame is an iron yoke, and the vertical frames of two adjacent single frames The iron core column is formed after the frame edges are combined, 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 set between the outer side of the upper pressing plate and the inner side of the upper clamp, and the lower iron yoke of the iron core is set on the base between the lower pressing plate and the lower clamp; the high voltage coil and The low-voltage coil is set on the iron core column; 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. 2. The non-encapsulated three-dimensional wound core amorphous alloy dry-type transformer according to claim 1, characterized in that: the low-voltage coil is a foil-wound or wire-wound cylindrical structure, and both the interlayer insulation and the end insulation are made of NOMEX paper; The high-voltage coil has a cake structure, and gaskets or comb-shaped stays are used as support for the cake, or the high-voltage coil has a layer structure, and NOMEX paper is used for interlayer insulation. 3. The non-encapsulated three-dimensional wound iron core amorphous alloy dry-type transformer according to claim 1 or 2, characterized in that: the three terminals of the high-voltage coil and the four terminals of the low-voltage coil are respectively arranged in the Mount the bracket on the upper clamp piece on the opposite side of the transformer. 4. The non-encapsulated three-dimensional wound core amorphous alloy dry-type transformer according to claim 1 or 2, characterized in that: an elastic insulating pad is arranged between the iron yoke and the base.

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