KR100805921B1 - Frame strucuture for transformer - Google Patents

Abstract

According to the present invention, by using an equal core in a transformer, the coil is firmly supported without stressing the core, thereby supporting vertical and horizontal directions of the inner, outer, and central portions of the coil corresponding to the long side of the core, which was impossible in the prior art. This ensures the safety of power facilitators by enduring electromechanical forces generated during load side abnormalities (electrical accidents) during transformer operation, eliminating varnish impregnation that reduces environmental pollution and insulation strength, and stresses the core during assembly. The present invention relates to a coil support frame structure for a transformer that can significantly reduce no-load loss and load loss by not applying it.

Description

Coil Support Frame Structure for Transformers {FRAME STRUCUTURE FOR TRANSFORMER}

1 is a perspective view of a state in which a coil support frame for a conventional transformer is applied;

Figure 2 is a perspective view showing a coil support frame for a conventional transformer,

3 is a perspective view showing a core coil assembled state of a conventional transformer;

4 is a perspective view showing a core coil assembly state of the coil support frame structure for a transformer according to the present invention;

5 is an exploded perspective view showing a coil support frame structure for a transformer according to the present invention;

6 is an assembled perspective view showing a coil support frame structure for a single phase transformer according to the present invention;

7 is an assembled perspective view showing a coil support frame structure for a three-phase transformer according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: transformer equal core 20: transformer coil

30: transformer 40: upper frame

50: lower frame 60: both sides frame

70 coil internal support 80 coil axial direction support

The present invention relates to a coil support frame structure for a transformer, and more particularly, to firmly support a core structure of a core equal transformer and an important part of a coil. The support core, the upper and lower sides, and the both sides of the frame are divided into equally divided cores that are appropriately divided accordingly, and the equal cores and frames that can directly support the coil without pressing the core are manufactured. The coil support frame structure for transformer that can suppress the increase as much as possible, omit varnish impregnation in the coil, and withstand the electromechanical force in the event of a power failure to prevent power loss by maintaining the winding state of the transformer coil as well as safe power reception. It is about.

In general, a variety of transformers are provided, such as power transformers connected to transmission and distribution lines and coupling transformers used in electronic circuits.

Among these transformers, the power transformer is a transformer that can change any voltage applied to the AC circuit to a higher or lower voltage, and the power does not change. There is a coil-type transformer in which two coils are wound.

In the transformer as described above, the core and the coil were fixed to the frame in order to prevent deformation of the core and the coil and to withstand mechanical strength in the event of a short circuit.

This conventional typical coil support frame structure for a transformer is shown in FIGS.

1 to 3, the member number 1 indicates a coil, 2 indicates a core, 3 indicates an upper frame, 4 indicates a lower frame, and 5 indicates an upper and lower fastening bolt.

As shown therein, the primary and secondary coils 1 were wrapped in the core 2 and fixed with upper and lower fastening bolts 5 while covering the upper and lower frames 3 and 4 on the transformer core 2.

However, the frame structure as described above is a transformer that supports the coil with upper and lower fastening bolts by pressing the outside of the long side of the transformer core. The iron loss increases due to stress caused by the pressure of the core. The cross-sectional area of the core included is additionally required, which increases the weight of the core and the coil as the average length of the coil increases, which increases the requirements of the raw materials in manufacturing transformers with the same efficiency characteristics. In addition, it was vulnerable to the horizontal and vertical forces of the electromechanical force in the event of short circuit, and to compensate for this, the coil was impregnated with varnish to improve the durability of the coil. The cause of the rise was also a factor in lowering the dielectric strength of the insulator.

In addition, there was a problem that the environmental pollution (possible to generate PCBs) and workability due to the toxicity of the varnish is reduced.

In order to solve the above problems, a coil supporting frame structure for various transformers without varnish impregnation is provided.

Among the coil support frame structures for transformers, the transformer coil frame of Patent Registration No. 381900 forms a bent portion that is bent to the inner surface on both sides so that the field core can be seated, and has fixing parts formed with bolt holes on both sides of the bent portion. The upper and lower frames, which are coupled to both ends of the bent portion of the upper and lower frames, are continuously connected to both sides of the upper and lower frames so as to support the side of the field core and support the end plate, and bend rigidity. The side frame is formed of a "b" type angle and has a support bar having a bolt hole in the upper and lower ends, and provided between the outer surface of the transcoil and the inner surface of the field coil core, which is provided inside the side frame and fitted into the field iron core. It includes an end plate interposed to support the deformation of the winding state by the pressing force of the frame is prevented It is a configuration.

However, the frame structure as described above is fixed to both sides of the upper frame, lower frame and the side frame with the bolt and the end plate is fixed to both sides of the transcoil, vulnerable to the horizontal force in the front and rear, and also weak in the vertical direction There was a problem.

In addition, the transformer structure of the column transformer is a frame structure that is applied to the internal steel transformer, even if it is applied to an external steel transformer, due to the frame structure fixing only both sides, it is also applied to the front and rear There is a problem in that the structure is complicated and vulnerable to heat by using a plurality of support members as well as being vulnerable to the horizontal force.

On the other hand, Utility Model Registration No. 371249 Transformer coil frame is a frame structure for fixing by inserting a support on the inner surface of the upper and lower frames, fixing only the outside of the magnetic field core to vary the load applied in each direction when the current is short-circuited. There was a problem that can not be distributed.

Therefore, the frame structures as described above only correspond to the vertical mechanical force and the horizontal mechanical force applied to both sides, and did not correspond to various mechanical forces.

Accordingly, the present invention is to provide a transformer core and a transformer that are sufficiently resistant to short-circuit mechanical force during power failure by suppressing increase in iron loss caused by a frame when assembling a transformer body, omitting varnish impregnation, and the like. After appropriately dividing the core of the transformer composed of coils in the width direction, insert the coil inner support and the coil inner central support to cope with the internal condensing force.The coil upper and lower support blocks, upper and lower frames, and both frames are located outside the coil. Its purpose is to provide a coil supporting frame structure for transformers that is compact and does not impregnate varnish impregnation, while minimizing increase in iron loss caused by work stress. .

In order to achieve the above object, the present invention provides a core equivalent transformer structure consisting of an upper frame, a lower frame, and a side frame to fix a transformer coil in which transformer coils are wound on a transformer equal core, In order to cope with the electromechanical force of the coil, an equal core having a structure capable of accommodating the axial direction of the coil and the frame on both sides is provided. The core is divided into any number in the width direction according to the electromechanical force generated in the coil. .

Inner side of the transformer coil of the transformer device includes a coil internal support and a coil inner support at the center of the transformer coil, and the axial front, rear, and axial direction of the transformer coil supported by the coil internal support. Coupling axial support portion formed by the upper and lower coil support blocks inserted into the center to support the coil, and the coupling piece in the upper and lower sides front and rear to be fixed to both sides of the transformer device fixed by the coil axial direction support portion and the coil inner support portion And a pair of both side frames formed with coupling holes on both sides of the upper and lower sides, and protruding inwardly the support pieces in contact with the front, rear, and center of the transformer equilateral core, and the upper and lower parts of the transformer in which both frames are fixed. Upper and lower accommodating parts are formed inward to be fixed by incorporating the Provides a coil support frame structure for a transformer, characterized in that the upper and lower fixing pieces are formed in a position corresponding to the plywood and the upper and lower sides are composed of upper and lower frames having upper and lower fixing holes.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above in detail as follows.

4 is an exploded perspective view showing a core coil of a transformer core support frame structure according to the present invention, FIG. 5 is an exploded perspective view showing a core support frame structure for a transformer according to the present invention, and FIG. FIG. 7 is an assembled perspective view illustrating a coil support frame structure for a single phase transformer, and FIG. 7 is an assembled perspective view illustrating a coil support frame structure for a three phase transformer according to the present invention.

As shown therein, the core support frame structure for the transformer of the present invention has an upper frame 40 and a lower frame 50 to fix the transformer 30 in which the transformer coil 20 is wound on the transformer equable core 10. ) And both side frames 60.

The core support frame structure for the transformer configured as described above divides the transformer equal-core core 10 on which the transformer coil 20 is wound in the transformer 30 into a pair of equal-core cores, that is, four cores at the rear. .

The coil inner side support part 70 is formed in the transformer coil 20 wound around the divided transformer equal core 10 so as to correspond to the internal condensing force of the transformer coil 20.

The coil inner support part 70 as described above has a coil inner support 71 having a “c” shape on both sides of the transformer coil 20, and a coil inner central support 72 at the center of the transformer coil 20. Built.

In order to axially support the transformer coil 20 supported by the coil inner support part 70, a coil axial support part 80 is formed, but before, after, and axially up and down the transformer coil 20. The upper and lower coil support blocks 81 and 82 of the flat plate are inserted to support the vertical surface of the coil.

In addition, both side frames 60 are formed to be fixed to both sides of the transformer 30 which is fixed by the coil axial support 80 and the coil inner support 70.

The two side frames 60 as described above form a coupling piece 61 in the upper and lower sides, and the coupling hole 62 on both upper and lower sides, and inward, rear and center of the transformer equalizing core 10. The support piece 63 which contacts surface is protruded inwardly.

The upper frame 40 and the lower frame 50 are formed such that the both side frames 60 are fixed by embedding the upper and lower portions of the transformer 30 in which the two side frames 60 are fixed.

Upper and lower receiving parts 41 and 51 are formed inside the upper frame 40 and the lower frame 50 as described above, and are positioned at positions corresponding to the engaging pieces 61 of both side frames 60 in the front and rear sides. A pair of upper and lower fixing pieces 42 and 52 are formed, and upper and lower fixing holes 44 and 54 are formed as upper and lower side surfaces 43 and 53.

Referring to the operation and effects of the present invention configured as described above are as follows.

First, the transformer coil 20 is wound around a pair of transformer equalizing cores 10 equally divided into front and rear to form a transformer 30, and the varnish impregnation process performed to cope with electromechanical force is omitted. The frame structure of the core equalization transformer corresponds to the internal and external condensing force by the lower frames 40 and 50, the two side frames 60, the coil inner support part 70, and the coil axial support part 80. It is assembled to correspond to mechanical force.

Inside the transformer coil 20 of the transformer coil 20 as described above, a pair of coil inner support 71 is built in the inner side and a coil inner central support 72 is built in the center to condense the inner and outer condensing force of the transformer coil. To respond.

In this state, the upper coil support block 81 and the lower coil support block 82 of the coil axial support part 80 are moved forward and rear of the upper and lower parts of the transformer equivalent core 10. By inserting and fixing the upper, lower front, rear, and the center, it can cope with the vertical mechanical force generated in the coil.

In this state of assembly, the three support pieces 63 formed on the inner side of the two side frames 60 on the side of the transformer 30 are inserted in the center of both sides of the transformer equalizing core 10 and surround the front and rear rooms. To form.

The upper and lower parts of the transformer 30 assembled as described above are assembled to be accommodated in the accommodation parts 41 and 51 of the upper and lower frames 40 and 50.

The transformer unit assembled as described above corresponds to the upper and lower fixing pieces 42 and 52 formed on the upper and lower frames 40 and 50 of the coupling pieces 61 formed on both side frames 60 and the coupling holes 62. ) Is fixed to the upper and lower fixing holes 44 and 54 formed on both upper and lower side surfaces 43 and 53 by means of bolts B, and built into an enclosure filled with cooling oil as in the prior art. Produces a transformer, and the core equivalent three-phase transformer has the same structure.

The transformer assembled as described above may correspond to the internal condensation force and may correspond to the vertical and horizontal mechanical forces without varnish impregnation.

As described above, the present invention forms an equal core by dividing the core in the width direction according to the strength of the electromechanical force generated in the event of a short circuit accident. The transformer coil has mechanical strength that does not deviate when it is short-circuited, and even if the transformer core (single-phase, three-phase) is large, the core is divided into equal parts and the weight and size are reduced, so the assembly is excellent and productivity can be improved. By dividing the long side of the transformer core of the technology into a space to support the center of the inside and the outside of the winding, the frame is directly supported by the coil so that the core is not stressed and the increase in iron loss due to the work occurring during assembly of the transformer body is minimized. Increase the efficiency of transformer, frame and core structure and nose Of possible to prevent excessive temperature rise, on an enlarged scale, a cooling passage, and there is an effect such as not to increase the dielectric strength of the coil working environment improved and the prevention of environmental pollution of the varnish impregnated work process.

The present invention has been shown and described with reference to certain preferred embodiments, but the present invention is not limited to the above-described embodiments and has ordinary skill in the art to which the present invention pertains without departing from the spirit of the present invention. Various changes and modifications may be made by the user.

Claims (1)

Coil supporting frame for transformer consisting of upper frame 40, lower frame 50, and both side frames 60 to fix transformer 30 in which transformer coil 20 is wound on transformer equal core 10 To A transformer 30 for dividing the transformer equalizing core 10 obtained by dividing the conventional transformer core 2 wound in the width direction into a pair of front and rear cores; Inner side of the transformer coil 20 of the transformer coil 20 has a coil inner support (71) and a coil inner support portion (70) having a coil inner central support (72) in the center of the transformer coil (20); , Coil axial support part formed of upper and lower coil support blocks 81 and 82 inserted into the front, rear and center to support the transformer coil 20 supported by the coil inner support part 70 in the axial direction. 80), Coupling pieces 61 are formed on the upper and lower sides of the upper and lower sides so that the transformer 30 fixed by the coil axial support part 80 and the coil inner support part 70 can be fixed to both sides. And a pair of both side frames 60 which protrude inwardly the support piece 63 in contact with the front, rear, and center of the transformer equalizing core 10 inwardly; The upper and lower accommodating parts 41 and 51 are formed inwardly to fix the upper and lower parts of the transformer 30 in which the both side frames 60 are fixed, and the coupling pieces of both side frames 60 in the front and rear sides ( 61, a pair of upper and lower fixing pieces 42 and 52 formed at positions corresponding to the upper and lower sides, and upper and lower fixing holes 44 and 54 as upper and lower side surfaces 43 and 53. Coil support frame structure for a transformer, characterized in that consisting of frames (40, 50).

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