KR102044514B1 - Transformer making method and height maintaining apparatus - Google Patents

Abstract

The present invention relates to a transformer manufacturing method and a height maintaining device used therein. The height maintaining device 30 of the present invention is provided with a first expansion bar 34 and a second expansion bar 37 at both ends of the rotation control mechanism 31, respectively by the rotation of the rotation control mechanism 31 The distance between the first hanger piece 35 and the second hanger piece 38 at the tip of is farther and closer. The first hook piece 35 is in close contact with one end surface of the winding 50 constituting the transformer body, and the second hook piece 38 is in close contact with the other end surface of the winding 50. The height of the winding 50 is kept constant by the height maintaining device 30 as described above. When the winding 50 is installed on the leg 43 of the iron core 40, the yoke coupling portion 45 of the end of the leg 43 constituting the iron core 40 by the function of the height retaining device 30 is In the process of forming the upper yoke 41 in a position extending from the end of the winding 50, the occurrence of air gap is minimized.

Description

Transformer manufacturing method and height maintaining apparatus used therein {Transformer making method and height maintaining apparatus}

The present invention relates to a transformer, and more particularly, to a method of installing a winding in the iron core constituting the transformer and a height maintaining device for maintaining the height of the winding in this process.

Transformer is to change the voltage and current of alternating current by using electromagnetic induction phenomenon. The transformer is widely used from small electronic devices to large substations or power transmission facilities.

A schematic configuration of such a transformer is shown in FIG. 1. As shown in the figure, the enclosure 3 constitutes the external appearance of the transformer 1. An iron core 5 is supported on the frames 7, 7 ′ inside the enclosure 3, and a winding 9 is provided on the iron core 5. The winding 9 is wound in a cylindrical shape.

The configuration of the iron core 5 is shown well in FIG. 2, which has an upper yoke 10 crossing the upper side and a lower yoke 10 ′ crossing the lower side in parallel with the upper yoke 10. There are legs 13 connecting the yoke 10 and the lower yoke 10 '. The upper yoke 10 and the lower yoke 10 ′ have a leg coupling portion 11 for connection with the legs 13, and the ends of the legs 13 are positioned at the leg coupling portion 11. There is a yoke coupling portion 15. The upper yoke 10, the lower yoke 10 ′ and the legs 13 constituting the iron core 5 are all made by stacking electrical steel sheets.

In order to install the windings 9 on the legs 13 of the iron core 5, the lower yoke 10 ′ except for the upper yoke 10 and the legs 13 are stacked, and the lower yoke made by stacking 10 ') and the legs 13 are erected and the windings 9 wound beforehand into the legs 13 are inserted. After the cylindrical winding 9 is inserted into the leg 13 and installed, the upper yoke 10 is formed by stacking steel sheets to be connected to the leg 13.

However, the process of making the upper yoke 10 by laminating electrical steel takes a lot of time, and in this process, the height of the winding 9 is increased by the springback phenomenon, so that the upper yoke 10 has the legs ( 13) Air gap occurs because it is not combined correctly. That is, the leg coupling portion 11 of the upper yoke 10 and the yoke coupling portion 15 of the leg 13 is not accurately coupled, there is a problem that a lot of noise is generated by the air gap.

That is, as shown in FIG. 3A, when the winding 9 is first inserted into the leg 13, the winding 9 is positioned at a position lower than the yoke coupling portion 15 of the upper end of the leg 13. Although there is an upper end, as time passes, the winding 9 becomes higher due to springback, which is higher than a part of the yoke coupling part 15 as shown in FIG. In this case, it is difficult to accurately install the upper yoke 10 on the yoke coupling part 15, so that an air gap occurs between the upper yoke 10 and the legs 13.

Japanese Patent No. 3145907 Japanese Patent No. 5230342

An object of the present invention is to solve the conventional problems as described above, to prevent the occurrence of air gap in the iron core in the manufacture of a transformer.

Another object of the present invention is to be able to regulate the height of the winding installed in the iron core of the transformer in a simple configuration.

According to a feature of the present invention for achieving the above object, the present invention in the height holding device for maintaining the height of the winding by pressing the upper and lower edges of the edge of the winding, there is a right screw end A first elastic bar having a rotation control tool having a left thread end at the other end, a first hook piece entering and exiting from the right thread end of the rotation control device, and a first hook piece hanging at the edge of the upper surface of the winding at the tip, and at the left thread end of the rotation control device. And a second elastic bar having a second hook piece at the front end and hooked to an edge of the bottom surface of the winding, wherein the first elastic bar and the second elastic bar enter and exit from the rotation control device according to the rotation of the rotation control device. As the distance between the first hook piece and the second hook piece becomes farther and closer.

The inner surface of the right threaded end is formed with a right threaded portion, and the outer surface of the first elastic bar is formed with a screw portion coupled to the right-handed threaded portion, the inner surface of the left-handed end is formed with a left threaded portion and the outer surface of the second elastic bar The threaded portion is coupled to the left screw portion is formed.

A first hook piece protrudes from the tip of the first elastic bar at right angles to the first elastic bar, and a second hook piece protrudes from the tip of the second elastic bar at right angles to the second elastic bar.

According to another feature of the invention, the present invention is a method of manufacturing a transformer in which a winding is installed to surround the leg of the iron core provided with a leg between the upper yoke and the lower yoke, a plurality of electrical A lamination process for laminating and forming a steel sheet, and a winding manufacturing method for manufacturing a winding installed on the leg to maintain the distance between the upper and lower surfaces of the winding using the height keeping device according to any one of claims 1 to 3. And a drying step of removing moisture from the windings with the height retaining device mounted thereon; a winding installation step of installing the windings passed through the drying step on the legs; The upper yoke lamination process of laminating and forming electrical steel sheets is included.

After performing the upper yoke lamination process, the upper part of the iron core is fixed to the upper frame, and the fixing step of fixing the lower part of the iron core to the lower frame is further performed.

When the winding is installed in the leg, the height of the winding is such that the upper end surface of the winding is positioned at a position lower than the yoke coupling portion of the leg.

A plurality of the height maintaining device is installed in the winding at a predetermined interval.

In the transformer manufacturing method according to the present invention and the height maintaining device used therein, the following effects can be obtained.

In the present invention, since the height of the winding is precisely regulated so as not to interfere with the coupling between the legs and the upper yoke constituting the core in the process of manufacturing the transformer, the air gap does not occur between the legs and the upper yoke of the core is in use There is an effect that can minimize the occurrence of noise.

In the present invention, the height holding device is used to maintain the height of the winding, the height holding device is rotated by rotating the rotation control in the state in which the first hook piece and the second hook piece is located at the top and bottom of the winding By adjusting the length, the height of the winding can be regulated by simple operation.

1 is a schematic view showing the configuration of a typical transformer.
Figure 2 is a partial cross-sectional perspective view showing the configuration of a general iron core.
3 is an explanatory diagram illustrating a change in the height of a winding in a conventional transformer.
Figure 4 is a perspective view showing a preferred embodiment of the height maintaining device for manufacturing a transformer according to the present invention.
5 is a perspective view showing an iron core without a winding and an upper yoke whose height is maintained by the height maintaining apparatus shown in FIG. 4;
Figure 6 is a perspective view showing a state in which the winding is installed on the legs of the iron core.
Figure 7 is a perspective view showing a state made by stacking the upper yoke.
Figure 8 is a perspective view showing a state where the iron core and the winding is installed between the upper frame and the lower frame.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing an embodiment of the present invention, if it is determined that the detailed description of the related known configuration or function is to interfere with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in explaining the component of the Example of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

As shown in the drawings, the height maintaining device 30 for manufacturing a transformer according to the present invention has a rotation control mechanism (31). The rotation control mechanism 31 is a cylindrical rod, one end has a right screw end 32 is formed with a right screw on the inner surface, and the other end has a left screw end 33 is formed with a left screw on the inner surface.

There is a first elastic bar 34 to enter and exit the right threaded end 32. Some outer surface of the first elastic bar 34 has a thread portion coupled with the right hand thread of the right hand threaded end 32. At the tip of the first elastic bar 34 is a first hook piece 35. The first hook piece 35 is provided to be orthogonal to one end of the first elastic bar 34 and is hooked to the edge of the upper end of the winding 50 to be described below. A material having a large frictional resistance may be installed on a surface of the first hook piece 35 that is seated on the top surface of the winding 50. For example, a surface layer made of rubber is formed to have a predetermined thickness. This is to allow the first hook piece 35 mounted on the upper end of the winding 50 to be accurately installed without slipping in the winding 50 and to function properly.

There is a second elastic bar (37) to enter and exit the left end of the screw thread 33 of the rotation control (31). Some outer surfaces of the second elastic bar 37 has a screw portion coupled to the left screw of the left screw end 33. A second hook piece 38 is provided at the tip of the second elastic bar 37. The second hook piece 38 is provided to be orthogonal to one end of the second elastic bar 37 and is hooked to the lower edge of the winding 50. In the second hook piece 38, a rubber layer may be provided on a surface seated on the bottom surface of the winding 50 with a material having a large frictional resistance, for example, rubber. This is for the same reason as in the first hook piece 35 above.

In order to maintain the height of the winding 50, the height maintaining device 30 of the present invention is mounted on the upper and lower edges of the winding 50 to be pressed to press the upper and lower ends of the winding 50. The height maintaining device 30 of the present invention is installed around the edge of the winding 50 a plurality of predetermined intervals.

Look at the configuration of the iron core 40 constituting the transformer. The iron core 40 is formed by stacking a plurality of electrical steel plates, and the upper yoke 41 crossing the upper portion of the iron core 40 and the lower yoke 41 'parallel to and intersecting the upper yoke 41. There are a plurality of legs 43 between the (). The upper yoke 41 and the lower yoke 41 'have a leg coupling portion 42 in many places. At the ends of the upper yoke 41 and the lower yoke 41 ′, the leg coupling portion 42 has an inclination of 45 degrees so as to be in engagement with the end of the leg 43. At about the middle of the upper yoke 41 and the lower yoke 41 ', the leg coupling portion 42 is formed in the shape of a' V 'shaped groove. At both ends of the leg 43, there are yoke coupling portions 45, respectively. The yoke coupling portion 45 has a shape corresponding to the coupling with the leg coupling portion 42.

The winding 50 surrounding the leg 43 is installed. Since the detailed configuration of the winding 50 is not the gist of the present invention, description thereof is omitted. The winding 50 is made cylindrical. The winding 50 is made into a cylindrical shape by winding the coil in a predetermined shape.

The coil constituting the winding 50 may be larger in size or height than immediately after being wound by a springback phenomenon in a wound state. In the present invention, the height maintaining device 30 is provided in preparation for the size increase in the height direction.

After winding the coil constituting the winding 50 to have a cylindrical shape, the height holding device 30 is installed around a plurality of edges to prevent springback from occurring in the height direction of the winding 50.

The first hook piece 35 of the height retaining device 30 is seated at the edge of the top surface of the winding 50, and the second hook piece 37 is seated at the edge of the bottom surface of the winding 50. In this state, when the rotation control mechanism 31 is rotated while the first elastic bar 34 and the second elastic bar 37 do not rotate, the first elastic bar 34 and the second elastic bar ( 37 is moved into and out of the rotation control device (31). To prevent the first elastic bar 34 and the second elastic bar 37 from rotating may use a groove structure in the winding 50 itself or use a separate clip.

Then, the configuration of the transformer body installed in the enclosure of the transformer will be described with reference to FIG. Windings 50 are respectively installed on the legs 43 connecting the upper yoke 41 and the lower yoke 41 ′ of the iron core 40, and the iron core 40 is connected to the upper frame 60 and the lower frame 60. Position it between ') and fix it. A plurality of push blocks 62 are installed between the upper frame 60 and the upper surface of the winding 50 to press the upper surface of the winding 50. A plurality of push blocks 62 are installed between the lower frame 60 'and the lower surface of the winding to press the lower surface of the winding 50.

It will be described below to manufacture the transformer body by installing the winding on the leg of the iron core using the height holding device of the present invention as described above.

Assembling the iron core 40 and the winding 50 and the upper and lower frames 60, 60 'constituting the transformer body, and manufacturing these parts will be described. First, electrical steel sheets constituting the remaining portion except the upper yoke 41 in the iron core 40 is laminated. That is, the lower yoke 41 'and the legs 43 are made by stacking electrical steel sheets. When the lower yoke 41 'and the leg 43 are made as shown in FIG. 5, the winding 50 is installed on each leg with the leg 43 upright. That is, the leg 43 passes through the center of the winding 50 having a cylindrical shape.

At this time, the height maintaining device 30 of the present invention surrounding the edge of the winding 50 is used. That is, the first hook piece 35 of the first elastic bar 34 is seated on the edge of the top surface of the winding 50, and the second hook piece 38 of the second elastic bar 37 is the winding ( 50) is seated on the edge of the bottom surface. In this state, when the first expansion bar 34 and the second expansion bar 37 are not rotated and the rotation control knob 31 is rotated, the first expansion bar 34 and the second expansion bar 37 are rotated. Is entered into and out of the rotation control mechanism (31). Accordingly, when the rotation control mechanism 31 is rotated in a specific direction, the first hook piece 35 and the second hook piece 38 simultaneously move in a direction closer to each other or simultaneously in a direction away from each other.

The first hook piece 35 is in close contact with the upper surface of the winding 50 by using the above operation, and the second hook piece 38 is in close contact with the lower surface of the winding 50. 50) can be prevented from stretching by the springback action in the height direction.

On the other hand, in the production of the winding 50, an insulating resin is used to prevent breakdown between the coils. The coil is immersed or applied to the insulating resin. Before this process, the washing is carried out to remove the foreign matter, and the drying operation is performed. After impregnating the insulating resin, the drying process is performed. In the present invention, the drying process is performed while the height maintaining device 30 is installed in the cylindrical winding 50. By doing so, it is possible to more reliably prevent height dimensional defects that may occur during the drying process.

The windings 50 made in this way are installed in the legs 43 of the iron core 40, respectively, as shown in FIG. As shown in FIG. 6, the upper surface of the winding 50 is located at a lower position than the yoke coupling portion 45 of the leg 43. This is because the height retaining device 30 of the present invention continuously regulates the dimension in the height direction of the winding 50.

In this state, the upper yoke 41 is made by stacking a plurality of electrical steel sheets. That is, the stacking process is performed such that the upper yoke 41 is coupled to the legs 43. 7 illustrates a state in which the upper yoke 41 is completed. At this time, since the height of the winding 50 is lower than the yoke coupling portion 45 of the upper end of the leg 43, the upper yoke 41 and the leg 43 during the lamination process of the upper yoke 41; There is no air gap between them.

As shown in FIG. 7, the assembly in which the winding 50 is installed on the iron core 40 is installed between the upper frame 60 and the lower frame 60 ′ as shown in FIG. 8. At this time, the pressing block 62 is installed between the upper frame 60 and the upper surface of the winding 50 to continuously press the upper surface of the winding 50. A pressing block 62 is also installed between the lower frame 60 ′ and the lower surface of the winding 50 to continuously press the lower surface of the winding 50.

In the above description, it is described that all the components constituting the embodiments of the present invention are combined or operated in one, but the present invention is not necessarily limited to these embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be inherent unless specifically stated otherwise, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1: transformer 3: enclosure
5: iron core 7: upper frame
7 ': lower frame 9: winding
10: upper yoke 11: leg coupling portion
13: Leg 15: York joint
30: height retaining device 31: rotation control
32: right-handed division 33: left-handed division
34: 1st extension bar 35: 1st hanger
37: 2nd Construction Bar 38: 2nd Hook
40: iron core 41: upper yoke
41 ': lower yoke 42: leg coupling
43: leg 45: yoke joint
50: winding 60: upper frame
60 ': Lower frame 62: Upper push block
62 ': Lower push block

Claims (7)

In the height holding device to maintain the height of the winding by pressing the upper edge and the lower edge of the winding,
A rotary knob with a right-hand end at one end and a left-hand end at the other end,
A first elastic bar having a first hook piece, which is entered from the right end of the rotation control port and hangs on the edge of the upper surface of the winding at the front end;
And a second elastic bar having a second hook piece that enters and exits from the left-hand end of the rotation control port and is hooked to an edge of the bottom surface of the winding at the front end thereof.
The first and second elastic bar and the second elastic bar in accordance with the rotation of the rotation control mechanism as the distance between the first hook piece and the second hook piece is moved in and out of the rotation control device to maintain the height.
According to claim 1, wherein the right side screw thread is formed on the inner surface of the right threaded end, the outer portion of the first elastic bar is formed with a screw portion is coupled to the right hand threaded portion, the left side threaded portion is formed on the inner surface of the left threaded end 2 is a height retaining device is formed on a portion of the outer surface of the elastic bar, the screw portion is coupled to the left screw portion.
3. The height of claim 2, wherein the first hook piece protrudes from the tip of the first elastic bar at right angles to the first elastic bar, and the second hook piece protrudes from the tip of the second elastic bar at right angles to the second elastic bar. Retaining device.
In the manufacturing method of the transformer provided with a winding so as to surround the leg of the iron core is provided with a leg between the upper yoke and the lower yoke,
A lamination process of forming a lower yoke and a leg by laminating a plurality of electrical steel sheets;
Winding manufacturing process for manufacturing a winding that is installed on the leg to maintain the distance between the upper surface and the lower surface of the winding by using the height maintaining device of any one of claims 1 to 3,
A drying process of removing moisture from the windings while the height maintaining device is mounted;
A winding installation step of installing the windings passed through the drying process on the legs;
The manufacturing method of a transformer comprising an upper yoke lamination step of forming a plurality of electrical steel by stacking the upper yoke on the upper end of the leg.
The method of claim 4, wherein after performing the upper yoke lamination process, the upper part of the iron core is fixed to the upper frame and the lower part of the iron core is fixed to the lower frame.
The method of manufacturing a transformer according to claim 5, wherein the upper end of the winding is positioned at a position lower than the yoke coupling portion of the leg when the winding is installed on the leg.
7. The method of claim 6, wherein the plurality of height maintaining devices are installed in the windings at predetermined intervals.

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