KR101090142B1 - Spacer of transformer, and buffer structure using thereof - Google Patents

Abstract

The present invention is to connect the upper and lower horizontal planes and each horizontal plane to provide a spacer for a mold transformer and a buffer structure using the same to improve the dielectric strength by increasing the specific surface area and to improve the buffering, sound absorption and vibration damping performance. A spacer for a mold transformer having a wall, comprising: a first planar portion (11) and a second planar portion (12) provided in contact with the coil assembly (3) on one horizontal surface; At least one protrusion (17) projecting outwardly from a horizontal plane between the first plane portion (11) and the second plane portion (12); A first inclined surface 13 formed on one side of a wall surface connecting the upper and lower horizontal surfaces; Disclosed is a spacer for a mold transformer including a plurality of grooves 14 recessed inwardly horizontally on the wall and a buffer structure using the same.

Description

Spacer for mold transformer and buffer structure using same {SPACER OF TRANSFORMER, AND BUFFER STRUCTURE USING THEREOF}

The present invention relates to a spacer for a mold transformer and a buffer structure using the same, which can improve the dielectric strength by increasing the specific surface area and at the same time improve the buffering, sound absorption and vibration damping performance.

In general, a transformer is a device that changes the value of alternating voltage or current by using electromagnetic induction. Also called a transformer, it is usually used to convert a voltage to a required value.

The basic structure is divided into primary and secondary windings by winding coils on both sides of the iron core, and the iron core is used as a passage for magnetic flux. When AC power is connected to the primary winding, current flows and alternating magnetic flux is applied to the iron core.磁 束) occurs, and this magnetic flux is connected to the secondary winding and alternately changes according to the frequency of the alternating current, so that voltage is generated in the secondary winding, and the primary and secondary winding coils The voltage can be adjusted accordingly.

Here, a transformer insulated by molding the windings of the coil wound around the core with epoxy resin is called a dry transformer. Dry transformer is a flame-retardant epoxy instead of insulating oil. Because it is simple and lightweight, it is installed in various fields such as buildings, apartments, subways, ships, etc. And because it is coated with epoxy resin, it can be installed in water treatment facilities to prevent corrosion from moisture and dust. .

1 shows a schematic structure of such a mold transformer. Referring to FIG. 1, a coil winding 3 in which a coil is wound, a base 1 and a frame 2, and an iron core connected therebetween. It is formed in the periphery, and the inside of the coil assembly 3 is molded with an epoxy resin in a coil wound state.

In this case, a spacer 10 is installed between the base 1 and the coil assembly 3 and between the frame 2 and the coil assembly 3, and the spacer 10 is formed between a high voltage winding and a low pressure winding. Distance, that is, the insulation distance between the coil assembly 3 and the frame 3 is maintained, and the function of attenuating or blocking the noise or vibration generated from the coil assembly 3 may be caused by electrical or mechanical shock. In this respect, the spacer must have sufficient electrical insulation strength since it serves to prevent the coil from coming off.

However, conventional spacers use a hexahedral spacer having a flat surface for ease of manufacturing in consideration of forming a rubber material such as silicon, and since the slit type spacer does not have a large specific surface area, When a certain voltage is applied to the spacer, a large current flows easily, resulting in a breakdown of the insulation strength, such as breakdown of the insulation.

In addition, the hexahedral spacer has a problem that the durability of the transformer structure is lowered due to a structural disadvantage that can not sufficiently absorb or block electrical, mechanical shock or vibration.

As described above, the conventional spacers have a problem such as shortening the inspection and replacement cycles and thus excessive maintenance costs due to insufficient durability of the transformer structure and insufficient insulation strength.

Accordingly, an object of the present invention devised to solve the above problems is to increase the specific surface area to improve the dielectric strength, and at the same time improve the buffer, sound absorption and vibration damping performance of the mold transformer spacer and the buffer using the same To provide a structure.

The mold transformer spacer of the present invention for achieving the above object is a mold transformer spacer having a wall surface connecting the upper and lower horizontal surfaces and each horizontal surface, the first flat portion provided to contact the coil assembly 3 on one horizontal surface (11) and the second planar portion 12; At least one protrusion (17) projecting outwardly from a horizontal plane between the first plane portion (11) and the second plane portion (12); A first inclined surface 13 formed on one side of a wall surface connecting the upper and lower horizontal surfaces; It characterized in that it comprises a plurality of grooves (14) which are dug inwardly horizontally on the wall surface.

In a preferred embodiment, the second inclined surface 15 may be further formed on the wall surface of the first inclined surface 13.

In addition, a smooth seating groove 16 may be further formed in a plane facing the base 1 or the frame 2, wherein the first and second planar portions 11 and 12 of the spacer 10 may be formed. The sum of the areas and the areas of the seating grooves 16 are the same.

The first side surface of the buffer structure using the spacer of the present invention for achieving the above object, the first and second buffer member 21 of the hexahedron to the first and second flat portion 11, 12 of the spacer, respectively The first and second buffer members 21 and 22 are disposed in contact with the coil assembly 3 by interposing) 22.

In addition, when the seating grooves 16 are formed in the spacer, the second side faces the third buffer member 30 of the hexahedron to support the base 1 or the frame 2. It is characterized by.

At this time, each of the buffer member is preferably a material that is softer than the spacer.

According to the present invention, since the outer surface of the spacer forms an inclined surface and at the same time a plurality of grooves are formed in a concave-convex shape, the specific surface area is wider than that of the non-magnetic spacer, so that the dielectric strength and impact damping performance are improved. There is this.

In addition, the spacer formed with a plurality of grooves is easy to install because it can be miniaturized due to the reduced volume while improving the dielectric strength, and also when the silicon buffer member of the type that is softer than the hardness of the spacer is installed at the top and bottom of the spacer, respectively. However, there is an advantage of innovatively reducing vibration and noise.

As a result, the inspection and replacement intervals of the spacers are extended, thereby reducing the maintenance and maintenance costs.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail, the exemplary structure of the accompanying drawings is only the most preferred form of the present invention, it is not intended to limit the present invention.

2 is a perspective view showing the structure of the spacer portion of the mold transformer according to the present invention, Figure 3 is a perspective view of a spacer for a mold transformer according to the present invention.

Prior to the description, the terms 'horizontal plane' and 'wall' are used to help the understanding of the present invention. The 'horizontal plane' refers to the top or bottom surface of the spacer 10 as a surface contacting the base 1 or the frame 2, as shown in FIG. 1, and the 'wall surface' refers to the top and bottom of the spacer 10. It refers to the approximately vertical plane connecting.

2 and 3, the spacer 10 for the mold transformer of the present invention is interposed between the upper portion of the coil assembly 3 and the upper frame 1 connected to the iron core of the coil, the spacer 10 The structure has a first plane portion 11 and a second plane portion 12 which are provided to be in contact with the coil assembly 3 on one side of the horizontal plane, that is, the bottom of the drawing.

In addition, a protrusion 17 protruding downward is formed between the first flat portion 11 and the second flat portion 12, and the protrusion 17 is inserted downward from an upper portion of the coil assembly 3. It has a function to prevent the phenomenon that the spacer 10 is pushed to the side. The protrusion 17 may have one or two as shown in the figure according to the upper concave-convex shape of the coil assembly 3, it is also possible to install more than three if the concave-convex.

In addition, the horizontal plane (top surface in FIG. 3) facing each of the plane portions 11 and 12 is a plane facing the base 1 or the frame 2. That is, when the spacer 10 is installed above the coil assembly 3, the horizontal plane becomes a surface facing the frame 2, and when the spacer 10 is installed below the coil assembly 3, the horizontal plane faces the base 1. Becomes

Meanwhile, a first inclined surface 13 is formed at one side of the wall surface connecting the upper and lower horizontal surfaces, and a groove 14 formed in the horizontal direction is formed on the wall surface, and the groove 14 is inward of the spacer 10. It is a hollow form. In order to increase the specific surface area of the spacer 10 to increase the dielectric strength, it is preferable that the grooves 14 be two or more in parallel and a plurality of the grooves be arranged in parallel.

It is also possible to further form a second inclined surface 15 on the wall surface of the first inclined surface 13, while the horizontal surface facing the base 1 or the frame 2 in a state of being parallel to the horizontal plane A seating groove 16 may be further formed, and this part is used for the purpose of seating the third shock absorbing member 30 to be described later, and the operation thereof will be described in detail later. By forming the first inclined surface 13 and the second inclined surface 15, the vibration and noise generated in the coil assembly 3 are further attenuated, and the structure of the transformer is simple and light.

The spacer 10 formed as described above may have a specific surface area that is increased compared to a spacer of a hexahedral form to improve insulation strength. However, the spacer 10 may be used only as it is. It can be used in parallel with the silicone material.

Figure 4 is an exploded perspective view of the spacer and the buffer member for a mold transformer according to another embodiment of the present invention, Figure 5 is an assembled perspective view of the spacer and buffer member for a mold transformer according to another embodiment of the present invention, Figure 6 As a side view showing the spacer structure of the mold transformer in another embodiment of the invention, the present invention will be further embodied through the following description.

4 to 6, the first and second flat parts 11 and 12 of the spacer 10 may be interposed with the first and second buffer members 21 and 22 of the hexahedron, respectively. The first and second buffer members 21 and 22 are in contact with the upper portion of the coil assembly 3.

In addition, when the seating groove 16 is formed on one side of the horizontal surface of the spacer 10 as described above, the seating groove 16 may be interposed with the third buffer member 30 of the hexahedron, the third buffer member ( 30 is supported in contact with the support bolt (2b) fastened to the base (1) or frame (2).

In this case, the sum of the areas of the first and second buffer members 21 and 22 in contact with the first and second planar portions 11 and 12 of the spacer 10 and the contacting groove 16, respectively. When the three buffer members 30 have the same area, the pressures acting on the upper and lower portions of the spacer 10 are the same, so that stress to any part of the spacer is not concentrated, thereby improving durability.

In addition, the first inclined surface 13 and the second inclined surface of the spacer so that the sum of the areas of the first and second planar portions 11 and 12 of the spacer 10 and the sum of the areas of the seating grooves 16 are the same. An inclined surface 15 is formed, and each of the inclined surfaces is gradually narrowed in the direction in which the seating groove 16 is formed.

On the other hand, each of the buffer members 21, 22, 30 is preferably a hardness of the material than the spacer 10, which is the spacer 10 is a relatively high hardness material of the coil assembly (3) ), While supporting the upper and upper part, and improving the dielectric strength, and the cushioning member of the relatively soft material has the function to attenuate shock, vibration or noise through its elasticity. To share the role.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art may make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. It is to be understood that the scope of protection of the present invention is therefore to cover all claims within the scope of the claims and equivalents thereof.

1 is a schematic view showing a typical mold transformer structure.

Figure 2 is a perspective view showing the structure of the spacer portion of the mold transformer according to the present invention.

3 is a perspective view of a spacer for a mold transformer according to the present invention.

Figure 4 is an exploded perspective view of the spacer and the buffer member for a mold transformer according to another embodiment of the present invention.

5 is an assembled perspective view of a spacer and a buffer member for a mold transformer according to another embodiment of the present invention.

Figure 6 is a side view showing the structure of the spacer portion of the mold transformer in another embodiment of the present invention.

Description of the Related Art

1 ... Bass

2 ... frame

3. Coil Assembly

10 ... spacer

11 ... First Plane

12 ... 2nd plane

13 ... First Slope

14 ... Groove

15. Second slope

16. Seating groove

17 ... turning

21. First buffer member

22. Second buffer member

30. Third buffer member

Claims (7)

In a spacer for a mold transformer having an upper and lower horizontal plane and a wall connecting each horizontal plane, A first flat part 11 and a second flat part 12 provided to be in contact with the coil assembly 3 on one horizontal surface; At least one protrusion (17) projecting outwardly from a horizontal plane between the first plane portion (11) and the second plane portion (12); A first inclined surface 13 formed on one side of a wall surface connecting the upper and lower horizontal surfaces; And a plurality of grooves (14) recessed inwardly horizontally on the wall surface. The method of claim 1, The spacer for the mold transformer, characterized in that the second inclined surface 15 is further formed on the wall surface of the first inclined surface (13). The method of claim 1, A spacer for a mold transformer, characterized in that a smooth seating groove (16) is further formed on the upper and lower horizontal surfaces facing the base (1) or the frame (2). The method of claim 3, The spacer of the mold transformer, characterized in that the sum of the areas of the first and second planar portions (11, 12) of the spacer (10) and the seating groove (16) is the same. In the buffer structure using the mold transformer spacer of claim 1, The first and second flat members 11 and 12 are interposed between the first and second buffer members 21 and 22 of the hexahedron, respectively, so that the first and second buffer members 21 and 22 may be coil assemblies ( 3) a buffer structure using a spacer for a mold transformer, characterized in that the contact with. In the buffer structure using a spacer for a mold transformer of claim 3, A buffer using a spacer for a mold transformer, characterized in that the third buffer member 30 of the hexahedron is interposed in the seating groove 16 to support the base 1 or the frame 2. rescue. The method according to claim 5 or 6, Each buffer member is a buffer structure using a spacer for a mold transformer, characterized in that the material is harder than the spacer.

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