KR20120029575A - Transformer with a unit core - Google Patents

Abstract

PURPOSE: A transformer in which a unit core of a rectangular shape is combined is provided to reduce whole volume of the transformer by winding low and high-tension coils on the arms of the unit core. CONSTITUTION: A unit core(100) of rectangular shape is formed by cutting thin plates(B, C) as a set value. A core body is formed by maintaining the unit core with unit cores which are contiguous as a triangle shape. Low and high-tension coils(300) are wound on a core arm part of the unit core of the core body. A magnetic circuit of a core yoke part of the unit cores is formed in the core arm part. The width length and the height length of the core body are same.

Description

Transformer with combined rectangular unit cores {Transformer with a unit core}

According to the present invention, in a transformer in which low and high pressure coils are wound around a core unit to which a rectangular unit core is coupled, more specifically, a thin plate is cut into 3 or 4 equal parts and simultaneously cut into a set dimension to form a rectangular unit core. In addition, the rectangular unit core is maintained in a triangle with neighboring unit cores, and then the low pressure coil and the high pressure coil are wound around the arms of the rectangular unit core with the same dimensions as the entire horizontal length and the vertical length. The present invention relates to a transformer in which a rectangular unit core is combined to minimize the floor space of the transformer and to narrow the installation space by allowing the enclosure of the transformer to be manufactured in a hexagonal or circular shape.

In general, a transformer is a device for converting a voltage by winding a copper wire around an iron core, and converts a voltage by winding coils (primary and secondary windings) that are copper wires in a core. It is a device using the electromagnetic induction action to induce a current in the secondary winding by the increase / decrease of the magnetic force line according to the change. In addition, a transformer is a device that receives AC power from one or more circuits, and modulates voltage and current by electromagnetic induction to supply AC power of the same frequency to one or more circuits.

These transformers are used for various purposes, for example, to reduce the normal power to a voltage suitable for a low voltage device or to increase the output voltage of a generator in a power system transmitting power over a long distance. There are also various types of instrument transformers, dry transformers, neon transformers, single winding transformers and column transformers.

Conventional power transformers have a transformer core, which is usually formed of silicon iron and formed into a thin plate, as will be described later.

As shown in Figs. 1 to 4, a coil-type power transformer is shown. This is a three-phase transformer, but three-phase core arms (1, 2, 3) composed of a thin plate of silicon iron are provided. Yoke cores 4 and 5 are provided on the upper and lower portions of the arms 1, 2 and 3 to form magnetic circuits.

In addition, around the core arms 1, 2, 3, a low pressure coil 6 of the primary coil and a cylinder 8 around the low pressure coil 6, and also the cylinder 8 The high pressure coil 7 of the secondary coil is wound around the outer circumference of the coil.

Further, the low pressure coil 6 and the high pressure coil 7 are arranged concentrically.

In addition, to dissipate heat generated by losses in the core arms 1, 2, 3 and coils 6, 7, and also to prevent contact between the high voltage part and the outside, and also to reduce external magnetic fields. For this purpose, the insulating spacers 10 are mounted on each other and the outer circumference of the low pressure coil 6, the cylinder 8, and the high pressure coil 7. A ground wire, not shown, is provided.

It is also important to establish such an environment that does not alter or reduce the insulating properties to predetermine the dielectric stresses dimensioned to minimize the risk of breakdown.

Thus, the individual coils in the transformer must be mechanically dimensioned to withstand any stress arising as a result of the current generated during the short circuit process and the resulting current forces. In general, the coils are designed such that the forces that are generated are absorbed in each individual coil.

In addition, the coil has a large volume predominantly subject to the high field strengths occurring in and around the transformer.

The core arms 1, 2, 3 constituting the conventional transformer and the core arms 1, 2, 3 in the formation of the yoke arms 4, 5 are arranged side by side and the core arms 1, 2, 3 Yoke cores (4, 5,) are coupled to the upper and lower sides corresponding to), and the coils are wound around the core arms (1, 2, 3), so that they are extended in the longitudinal direction of the left and right sides of the transformer and eventually Increasing the area results in an increase in the transportation cost due to an increase in the volume area of the transport, and also has a problem that the installation area becomes large.

The present invention is to solve the above problems, and the core of the unit core after being formed into a rectangular unit core, the rectangular unit core is composed of a triangular core body with the neighboring core, and then the arms of the unit core It is intended to reduce the overall volume of the transformer by winding the low and high pressure coils.

In addition, the present invention is intended to be able to minimize the installation space of the transformer by making the horizontal and vertical length of the core body is the same as the outer box of the hexagonal or circular transformer.

 In addition, an object of the present invention is to cut the thin plate of the rectangular unit cores into 3 to 4 equal parts and at the same time cut into a set dimension to form a rectangular unit core, while the cross section of the rectangular unit core is laminated in a substantially rhombic shape. .

In addition, the present invention is intended to be made even smaller than the conventional transformer because the core of the transformer is formed without heat cutting, heat treatment after the molding, the noise is low, the no-load current is minimized, and the no-load loss is lowered by more than 20%. .

The present invention relates to a transformer in which a rectangular unit core in which a coil is wound concentrically on a core arm portion in which a magnetic circuit of a core yoke portion is formed, is cut into thin plates to form a rectangular unit core. After constructing a core body such that the rectangular unit core is held in a triangle with neighboring unit cores, the low pressure coil and the high pressure coil are wound around the core arm portions of the rectangular unit core of the core body so that the overall length and length The basic feature is that the length is configured with the same dimensions.

In addition, the present invention is to cut the thin plate of the rectangular unit core into 3 to 4 equal parts and at the same time cut into a set dimension to form a core body consisting of three triangular unit cores made of a triangular, to cover the transformer The enclosure can be made hexagonal or circular.

Moreover, the cross section of the rectangular unit core which cut | disconnected the said thin plate of the present invention with the set dimension of 3-4 quarters is laminated-molded in rhombus shape.

As described above, according to the present invention, the thin plate is cut into 3 to 4 equal parts and cut into a set dimension to form a rectangular unit core, and the rectangular unit core is maintained in a triangle with neighboring unit cores. The low pressure coil and the high pressure coil are wound around the arms of the rectangular unit core, and the horizontal and vertical lengths thereof are the same, so that the enclosure of the transformer can be manufactured in a hexagonal or circular shape. It can minimize the installation space.

1 is a front view of a coil-type power transformer,
2 is a side view of a coil-type power transformer;
3 is a longitudinal sectional view of a coil-type power transformer;
4 is a plan view of a coil-type power transformer,
5 is an exemplary cutaway view of a thin plate of a rectangular unit core of the present invention;
6 is a front view of a rectangular unit core of the present invention;
7 is an enlarged sectional view taken along line AA of FIG. 6 of the present invention;
8 is a plan view of the core body of the present invention;
9 is a front view as seen from FIG. 8B of the present invention;
10 is a front view as seen from FIG. 8C of the present invention;
11 and 12 are plan views of the core body of the present invention with an enclosure;

Detailed examples of the present invention will be described below with reference to the accompanying drawings.

The unit core 100 of the present invention is manufactured in a rectangular shape as shown in FIG. In addition, as described below, the rectangular unit core 100 constitutes a core body 200 coupled to neighboring unit cores 100 in a triangular shape as illustrated in FIG. 8. In addition, the coils 300 are wound around the rectangular unit core 100 of the core body 200. In addition, as shown in FIGS. 11 and 12, the transformer 400 is covered with the core body 200 on which the coil 300 is wound.

As shown in FIG. 5, the rectangular unit core 100 cuts and joins the cores of the thin plates A, B, and C into 3 to 4 equal parts. As for the shape of the whole, the length l shown in the design value of each core is cut | disconnected like the cutting line a as shown in the figure.

In addition, the cut cores of the thin plates A, B, and C are sequentially wound in a winding machine. Thereby, the rectangular unit core 100 as shown in FIG. 6 can be manufactured.

In addition, in FIG. 6, the cross section of the rectangular unit core 100 maintains a substantially rhombic shape as shown in FIG. 7.

The unit core 100 has a rectangular shape up and down the core yoke portion 110, and both sides of the unit core 100 constitute the core arm portion 120.

In addition, as shown in FIGS. 8, 9, and 10, the core unit 200 is configured such that the rectangular unit core 100 is maintained in a triangle with neighboring unit cores 100, and then the core body 200 is formed. The low and high pressure coils 300 are wound concentrically on the core arm portions 120 in which the magnetic circuits of the core yoke portions 110 of the rectangular unit cores 100 are formed.

As shown in FIG. 8, the core body 200 wound around the low and high pressure coil 300 of the present invention is configured to have the same dimensions as the entire horizontal length and the vertical length.

That is, in the present invention, the thin plate of the rectangular unit core 100 is cut into 3 to 4 equal parts and simultaneously cut into a set dimension to form a core body 200 having three triangular unit cores 100 formed of a triangular shape. 11 and 12, it is possible to manufacture the enclosure of the transformer to be covered on the core body 200 in a hexagonal or circular shape.

Therefore, the present invention can minimize the installation space of the transformer by making the horizontal and vertical length of the core body 200 is the same as the outer box 400 of the hexagonal or circular transformer.

That is, the present invention can minimize the floor area of the transformer to narrow the installation space.

100: rectangular unit core 110: core yoke portion
120: core arm portion 200: core body
300: low pressure coil 400: enclosure
A, B, C: Sheet a: Cutting Line
l: length

Claims (3)

In a transformer in which a rectangular unit core in which a coil is wound concentrically is wound in a core arm portion in which a magnetic circuit of a core yoke portion is formed,
The thin plates A, B, and C are cut to set dimensions to form a rectangular unit core 100, and the rectangular unit core 100 is maintained in a triangle with neighboring unit cores 100. After the core body 200 is formed, the low and high pressure coils 300 are wound around the core arm portions 120 of the rectangular unit core 100 of the core body 200 so that the entire horizontal length and the vertical length are reduced. A transformer in which a rectangular unit core is combined, characterized by being configured with the same dimensions. 3. The core of claim 1, wherein the thin plates A, B, and C of the rectangular unit core 100 are cut into 3 to 4 portions and simultaneously cut into a set dimension so that three of the rectangular unit cores 100 are triangular. Forming a sieve (200), the transformer of the rectangular unit core is combined, characterized in that the enclosure of the transformer to be covered on the core body 200 can be manufactured in a hexagonal or circular. The rectangular cross-section of the rectangular unit core 100 obtained by cutting the thin plates A, B, and C with a set dimension of 3 to 4 is laminated in a rhombus shape. Transformer with unit core.

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