KR101064905B1 - Manufacturing method of amorphous transformer - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an amorphous transformer, and in particular, a cross-sectional structure of at least one of a leg and a yoke of an amorphous core close to a circle, and a low pressure winding wound around the leg of the amorphous core and The high-voltage winding is also wound in a circular shape to improve the short-circuit mechanical force that the transformer can withstand during external short-circuit, and to manufacture the amorphous transformer compactly, and to use the circular amorphous iron core to increase the size of the capacity when manufacturing the amorphous transformer. The present invention relates to a method of manufacturing an amorphous transformer that enables the manufacture of a large capacity transformer of several MVA or more without being limited.

In the configuration of the present invention, at least a plurality of cores are laminated to form a completed core, and at least a plurality of the completed cores are arranged in combination, and then the low pressure and high pressure windings are coupled to the legs and yokes of the arrayed cores. A method of manufacturing an amorphous transformer, the method comprising the steps of: fabricating circular cores having different widths and sizes; Molding each of the cores formed into a circle; Magnetization and heat treatment of the molded core; A first molding step of the core subjected to the magnetization and heat treatment; Inspecting the molded core; Stacking each core having a different width and size through the inspection step; A second molding step of molding a corner portion of the completed core through the lamination step; Arraying a plurality of the completed cores; And completing a transformer by coupling a low voltage winding and a high voltage winding to the arrayed cores, and at least one of legs and yokes of the cores which are formed to be in contact with each other between the completed cores in the array coupling step. Is characterized in that the width and size of the contact surface becomes smaller.

 Amorphous Transformer, Wirewound, Legs, Yoke, Amorphous

Description

MANUFACTURING METHOD OF AMORPHOUS TRANSFORMER

The present invention relates to a method for manufacturing an amorphous transformer, and more particularly, in order to implement a circular cross-section of at least one of the legs and the yoke of the core and the width of the core that is laminated in the inner direction to the outside when the core is laminated A method of manufacturing an amorphous transformer in which at least one of legs and yokes of a core formed in a fold is formed in a circular shape by forming a single finished core by stacking and fabricating a different size and arranging the finished cores to be in contact with each other. It is about.

Amorphous metal is an amorphous magnetic material made by melting, rapid cooling, etc. using a mixture of iron (Fe), boron (B), and silicon (Si), and is 0.025㎜ that is solidified and irregularly arranged before atoms are regularly arranged. Is an alloy lamination.

The amorphous transformer using the amorphous magnetic material is an energy-saving transformer that can increase the efficiency and significantly reduce the power cost than using the conventional silicon steel sheet transformer with no load loss reduction of more than 75%.

That is, the characteristic of the amorphous transformer,

No-load loss by amorphous structure and ultra-thin iron core material can be reduced by more than 75%, unnecessary energy loss and electricity cost can be reduced, and the operation cost and life span of transformer can be reduced by reducing the loss. It can achieve high efficiency and compactness due to its excellent magnetic characteristics in the harmonic band, and reduce heat dissipation due to power consumption, thereby improving the environment such as preventing global warming and preserving environment by reducing power plant construction and reducing emissions of harmful gases. It has an effect.

The core of the amorphous transformer as described above is generally manufactured as shown in FIG. 1 or 2, and as shown in FIG. 3, the cross-sectional shape of the iron core (core) leg is adopted by adopting a rectangular quadrangular structure. In addition, a transformer was manufactured by combining the low pressure winding and the high pressure winding.

In addition, in the manufacturing method of the iron core can be produced in the winding core in the case of a small capacity of three phase 500kVA or less, but in the above capacity it is common to manufacture in the form of red iron core.

In addition, although the reference capacity is not determined, the transformer used for a large capacity and a large current of several MVA or more was generally manufactured in the form of hematite core by implementing a circular cross section in consideration of mechanical strength and work characteristics.

In the past work, it was extremely rare to implement a circular cross section in the form of a coil core. In particular, in the case of the core of an amorphous transformer, no attempt was made to implement a circular cross section due to manufacturing characteristics.

On the other hand, as the large-capacity and large current of the amorphous transformer, the core leg needs to be implemented in a circular shape in terms of short-circuit mechanical force and working method.

The transformer basically has to withstand a certain amount of mechanical force that can occur in a short circuit accident, and the short circuit mechanical force generated in the winding of the transformer in the short circuit acts in the opposite direction to the inner and outer windings.

That is, the winding close to the transformer core is in the direction of the center of the transformer core leg, and the winding located on the opposite side of the core is generated in the opposite direction of the iron core leg, that is, the force that expands outward is changed into a circular model. Force is generated.

When the iron core and the winding cross section are circular, the force generated in the coil of the winding maintains the circular model so that the repulsive force is evenly distributed, and since the shape is not changed, the horizontal short mechanical force is much superior to the conventional winding.

In addition, there is no artificial bending of the conductor during circular winding work, and no winding stacking swelling occurs.

Conventional winding has an artificial winding of the winding conductor at the four corners as the iron core is made in a rectangular shape during the winding operation, as shown in Figure 3, depending on the transformer capacity, winding swelling of about 3% to 50% occurs In order to eliminate this problem, a sizing process was required in the winding operation. When excessive sizing was performed, a problem of weakening of the dielectric strength occurred due to the pressing phenomenon of the conductor or conductor insulation in the protruding part or the bending part.

On the other hand, the hematite core transformer slits one sheet (sheet) of silicon steel sheet fabric in various necessary widths, and the cross section of the iron core leg of the transformer can be manufactured to be close to a circle.

However, the amorphous core has a hardness of about 10 times stronger than that of a general silicon steel sheet, which is very disadvantageous in terms of cost and technology for slitting and cutting.

In addition, since the sheet of amorphous core is about 1/10 of the thickness of the existing silicon steel sheet core, lamination was difficult, and even when the lamination was possible, loss was increased when external stress was applied, and thus original characteristics could not be maintained.

Therefore, the amorphous core had a technical weakness in the application of a large-capacity transformer in the form of a coil core.

The present invention has been made to solve the problems of the prior art, the main object of the present invention is to provide a method for manufacturing an amorphous transformer with improved short-circuit mechanical force by making at least one of the legs and yoke of the core in a circular shape have.

Another object of the present invention was to apply only the layer winding method of the rectangular winding and the fan cable winding method as the form of the core core up to now, but the large-capacity transformer which has been increased from the current as the core of the circular leg and the circular yoke of the amorphous core becomes possible It is an object of the present invention to provide a method for manufacturing an amorphous transformer that enables the production of a special winding transformer for high current.

A final object of the present invention is to provide a method of manufacturing an amorphous transformer with less stacking swelling and equally distributed voltage stress during winding.

In order to achieve the above object, in the method of manufacturing an amorphous transformer of the present invention, by stacking at least a plurality of cores to form a completed core, and at least a plurality of the plurality of completed cores arranged in combination, the arrayed core Claims [1] A method of manufacturing an amorphous transformer for manufacturing a low voltage winding and a high pressure winding by coupling a leg and a yoke of the method, the method comprising: manufacturing circular cores having different widths and sizes; Molding each of the cores formed into a circle; Magnetization and heat treatment of the molded core; A first molding step of the core subjected to the magnetization and heat treatment; Inspecting the molded core; Stacking each core having a different width and size through the inspection step; A second molding step of molding a corner portion of the completed core through the lamination step; Arraying a plurality of the completed cores; And coupling a low pressure winding and a high pressure winding to the arrayed cores to complete a transformer. Among the legs and the yokes of the cores formed by contacting each other between the completed cores in the arrangement coupling step. At least one is characterized in that the width and size is reduced based on the contact surface.

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At this time, the step of stacking the step of placing the first core on the assembly means; Coupling a second core to circumscribe the first core; Coupling a third core to circumscribe the second core; And combining the fourth core to circumscribe the third core, wherein the core located inside is smaller in width and size than the core located outside.

In addition, the lamination step may include placing the first core on the assembly means; Coupling a second core to inscribe the first core; Coupling a third core to inscribe the second core; And coupling a fourth core to be inscribed in the third core, wherein the core located outside is smaller in width and size than the core located inside.

According to the present invention described above, by using an amorphous core in the form of a core core while the cross-section structure of the iron core is close to the circular, it is possible to reduce the joining point, the loss can be reduced compared to the red core type having a large number of joining points , A combination of different amorphous widths with at least one of a near-legged leg and yoke and a cylindrical high-pressure and low-pressure winding in the leg, where applied to the inlet type, when applied to an inlet type, a large short circuit without varnish impregnation of the winding It can withstand mechanical forces, and in the case of dry or mold type transformers, it is possible to manufacture large-capacity amorphous transformers regardless of the capacity (kVA) of the transformer, and in particular, various winding methods can be applied for winding coils on core cores. In the winding work, stacking is less swelling and voltage stress is equally distributed. There is.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing the configuration of a conventional amorphous core, FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1, FIG. 3 is a schematic cross-sectional view of a leg of a conventional amorphous transformer, and FIG. FIG. 5 is a perspective view schematically illustrating a structure of an amorphous core of an amorphous transformer according to an embodiment of the present disclosure, FIG. 5 is a cross-sectional view taken along line BB ′ of FIG. 4, and FIG. 6 is a block diagram illustrating a method of manufacturing an amorphous transformer according to the present invention. 7 is a view schematically showing the coupling step of the amorphous transformer manufacturing method according to the present invention by one embodiment, Figure 8 is a leg of the arrangement by the coupling of the completed core of the amorphous transformer according to the present invention Figure 9 is a schematic cross-sectional view, Figure 9 is a schematic diagram showing the entire process until the low-voltage and high-voltage winding coupling operation of the amorphous transformer manufacturing method according to the present invention, Figure 10 A schematic cross-sectional view of the leg portion of the amorphous transformer according to the invention, Figure 11 is a diagram produced by Evans Type by the amorphous core of the amorphous transformer according to the invention to one embodiment.

First, as shown in FIGS. 4 to 11, the core 100 is formed by stacking at least a plurality of cores of different widths and sizes to reduce no-load loss and increase energy efficiency. An amorphous core fabricated by arranging a plurality of the completed cores 100 in an array; A low pressure winding coupled to the amorphous core; And a high pressure winding coupled to the low pressure winding.

That is, as shown in FIG. 7 or FIG. 11, the completed core 100 includes a first core 101; A second core (102) coupled to the first core (101) and formed to have a predetermined wider width and size than the first core (101); A third core 103 coupled to the second core 102 and formed to have a predetermined wider width and size than the second core 102; And a fourth core 104 coupled to the third core 103 and formed to have a predetermined wider width and size than the third core 103.

In FIG. 7, a plan view of each of the cores 101, 102, 103, and 104 and a cross-sectional view of a portion C-C 'of the plan view is illustrated. , 104) is shown schematically only, not exactly the cross-sectional shape in order to show a state that the lamination is combined.

On the other hand, the core shown in Figure 4 or 5, but the thickness is shown uniformly, as shown in Figure 8 or 10, it is preferable to produce a different thickness.

That is, it is preferable to make the thickness of the core located on the outside thicker than the thickness of the core located on the inside. (One completed core 100 formed on the outside of the Evans Type amorphous transformer is manufactured in reverse)

In addition, at the time of arranging the completed cores, at least one of the cross sections of the legs 200 and the yokes 210 which are in contact with each other of the completed cores 100 may be formed in a circular shape as shown in FIG. 8 or 11. 8 or 11 illustrate cross-sectional views of the leg 200 and the yoke 210.

Accordingly, as shown in FIG. 10, the low pressure coil (low pressure winding) and the high pressure coil (high pressure winding) are wound in a circular shape on the leg 200, so that a cross section of the entire leg forms a circular shape.

On the other hand, as shown in Figure 6 to 9, in order to reduce the no-load loss and increase the energy efficiency, at least a plurality of cores are laminated to form a completed core, and at least a plurality of the cores are arranged in combination, In the manufacturing method of the amorphous transformer to combine the low-voltage winding and the high-voltage winding to the legs and yoke of the arrayed core, step of producing a circular core of different widths and sizes (S100); Molding each of the cores produced in the circle (S200); Magnetization and heat treatment of the molded core (S300); A first molding step (S400) of the core subjected to the magnetization and heat treatment; Inspection step (S500) of the molded core; Stacking each core having a different width and size through the inspection step (S600); A second molding step (S700) of molding a corner portion of the completed core 100 through the lamination step; Arraying a plurality of the completed cores (100) (S800); And combining the low pressure winding and the high pressure winding with the array coupled core to complete a transformer (S900). The array coupling step (S800) is formed to be in contact with each other between the completed cores (100). At least one of the legs 200 and the yoke 210 of the core are combined to have a smaller width and size based on a contact surface.

At this time, the stacking step (S600), as shown in Figure 6, the step of placing the first core 101 on the assembly means 300; Coupling the second core (102) to circumscribe the first core (101); Coupling the third core (103) to circumscribe the second core (102); And coupling the fourth core 104 to be circumscribed to the third core 103, wherein the core located inside is made smaller in width and size than the core located outside.

On the other hand, Figure 11 shows the amorphous core of the Evans Type amorphous transformer, in the case of the Evans Type leg 200 and the yoke 210 are all formed in a circular shape.

As shown in FIG. 11, the Evans Type amorphous transformer has two completed cores 100 formed therein, which are manufactured as described above, and which are formed outside of the two completed cores 100. One completed core 100 is combined to produce a smaller size of the core that is folded to the outside.

That is, at the time of manufacturing one completed core 100 formed on the outside in the lamination step, placing the first core on the assembly means; Coupling a second core to inscribe the first core; Coupling a third core to inscribe the second core; And combining the fourth core to be inscribed with the third core.

By manufacturing the core formed on the outside through the above steps, the core located on the outside is formed so that the width and size is smaller than the core located on the inside, in the case of Evans Type, both the legs and the cross section of the yoke You can make it closer.

In addition, the amorphous transformer of the present invention is mainly used in the production of dry, mold and inflow.

An amorphous transformer and a method of manufacturing the same according to the present invention described above will be described in detail according to the manufacturing process. (See FIGS. 4 to 10.)

1) A winding step of fixing the amorphous ribbon so that it can be easily released, and winding the plurality of ribbons having a predetermined width at a time in which the fixed amorphous ribbon (S1 of FIG. 8)

2) a cutting step (S2 of FIG. 8) and a laminating step of cutting the ribbon wound to a predetermined width through the winding step.

3) step of producing a circular core by overlapping the cutting and laminating steps and overlapping the ends of the stacked amorphous ribbons according to the number of groups (S100, S3 of FIG. 8)

4) molding step of forming the circular core formed in a predetermined shape (S200, S4 of Fig. 8)

5) Magnetizing the cores formed in a predetermined form through the forming step (S200) while supplying a predetermined current while heat-treating the cores to a suitable temperature to generate a sufficient magnetic field, and cooling the magnetized cores. Heat treatment step (S300, S5 of FIG. 8)

6) a first molding step (S400, S6 of Fig. 8) to apply a coating solution to each of the cores subjected to the magnetization and heat treatment step and then coated and then hardened in a dryer.

7) an inspection step of removing a molding member from each of the cores that have passed through the first molding step (S400), and checking whether the core from which the molding member has been removed has a loss, an excitation current, and a dimension corresponding to a prescribed value (S500, S7 of FIG. 8

8) placing the first core 101 having the smallest width and size on the assembling means (S600, S8 of FIG. 8).

9) after opening the overlap of the second core 102 is combined with the first core 101 and fixed to the assembly means (S600, S9 of FIG. 8)

10) after the overlap of the third core 103 is coupled to the second core 102 (S600, S10 of FIG. 8)

11) after the overlap of the fourth core 104 is coupled with the third core 103 (S600, S11 of FIG. 8)

12) the second molding step (S700, S12 of Fig. 8) for molding the corner portion of the completed core 100 produced by the steps 8) to 11) with epoxy.

13) step of arranging the completed core (100) (S800)

14) The low pressure winding and the high pressure winding are combined with a core (amorphous core) manufactured through the steps 1) to 13) to complete a transformer.

▶ In the above description of the amorphous transformer and the method of manufacturing the present invention, after combining at least a plurality of the manufacturing process of the completed core 100 and the completed core 100, the legs of the arrayed core Since the winding of the low pressure winding (low pressure coil) and the high pressure winding (high pressure coil) in a circular shape is the core of the present invention, the description has been mainly focused on this part, and the manufacturing process of other amorphous transformers is a known fact. Is omitted.

While the present invention has been illustrated and described with respect to preferred embodiments, the invention is not limited to the above-described embodiments, and is commonly used in the field of the invention without departing from the spirit of the invention as claimed in the claims. Anyone with a variety of variations will be possible.

1 is a view showing a brief configuration of a conventional amorphous core,

2 is a cross-sectional view taken along line AA ′ of FIG. 1;

3 is a schematic cross-sectional view of a leg of a conventional amorphous transformer,

4 is a perspective view schematically showing a configuration according to an embodiment of an amorphous core of an amorphous transformer according to the present invention;

5 is a cross-sectional view taken along line BB ′ of FIG. 4;

6 is a block diagram showing a method of manufacturing an amorphous transformer according to the present invention;

7 is a view schematically showing, by one embodiment, the coupling step of the amorphous transformer manufacturing method according to the present invention;

8 is a schematic cross-sectional view of a leg by arrangement coupling of a completed core of an amorphous transformer according to the present invention;

9 is a view schematically showing the entire process until the low-voltage and high-voltage winding coupling operation of the amorphous transformer manufacturing method according to the present invention,

10 is a schematic cross-sectional view of a leg portion of an amorphous transformer according to the present invention;

FIG. 11 is a view illustrating an amorphous core of an amorphous transformer according to the present invention manufactured by Evans Type according to one embodiment; FIG.

<Description of the symbols for the main parts of the drawings>

100: completed core 101: first core

102: second core 103: third core

104: fourth core 200: leg

210: yoke 300: assembly means

S100: round core manufacturing step S200: forming step

S300: magnetization and heat treatment step S400: first molding step

S500: Inspection step S600: Lamination bonding step

S700: second molding step S800: array coupling step

S900: step to complete the transformer by combining low and high voltage windings

Claims (6)

delete delete delete At least a plurality of cores are laminated to form a completed core, and at least a plurality of the cores are arranged in combination, and then the low-voltage and high-voltage windings are fabricated by combining the low-voltage winding and the high-pressure winding to the legs and yoke of the arrayed core In the manufacturing method, Fabricating circular cores having different widths and sizes, respectively; Molding each of the cores formed into a circle; Magnetization and heat treatment of the molded core; A first molding step of the core subjected to the magnetization and heat treatment; Inspecting the molded core; Stacking each core having a different width and size through the inspection step; A second molding step of molding a corner portion of the completed core through the lamination step; Arraying a plurality of the completed cores; And Coupling a low pressure winding and a high pressure winding to the arrayed cores to complete a transformer; And, At least one of the legs and the yoke of the core formed to be in contact with each other between the completed core in the arrangement coupling step, the width and size of the amorphous transformer, characterized in that the manufacturing method. The method of claim 4, wherein the stacking step, Placing the first core on the assembly means; Coupling a second core to circumscribe the first core; Coupling a third core to circumscribe the second core; And Coupling a fourth core to circumscribe the third core; And, A method of manufacturing an amorphous transformer, wherein the core located inside is formed to have a smaller width and size than the core located outside. The method of claim 4, wherein the stacking step, Placing the first core on the assembly means; Coupling a second core to inscribe the first core; Coupling a third core to inscribe the second core; And Coupling a fourth core to inscribe the third core; And, A method of manufacturing an amorphous transformer, wherein the core located outside is formed to have a smaller width and size than the core located inside.

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