JP2023008491A - Transformer and v-connection multistage transformer - Google Patents

Abstract

To improve content fixation strength of a wound core type transformer.SOLUTION: A transformer comprises a coil, a wound core, fastening metal fittings, and a spacer. These components of the transformer are described herein. The wound core is a component inserted in the coil. The fastening metal fittings are components having a concave shape and disposed on an upper surface side and a lower surface side of the wound core. The fastening metal fittings cover and fix the upper surface side and the lower surface side of the wound core. The spacer is a component disposed between the wound core and the fastening metal fittings. The spacer is inserted between the coil and the wound core and on a winding surface side of the wound core.SELECTED DRAWING: Figure 1

Description

The present invention relates to the fixing of the core structure in a wound core type transformer.

The configuration of a single-phase transformer is mainly composed of an iron core and coils, and bands and fasteners that secure the iron core and coils. Since the load corresponding to the mass is applied to the iron core, the performance of the iron core may be deteriorated. Therefore, a coil support is used to receive the load of the coil. In addition, since it is difficult to manufacture the iron core and the coil in accordance with the required dimensions, a dimensional margin is provided so that they do not interfere with each other when the iron core and the coil are combined. Therefore, when the iron core and the coil are combined, a space of about several millimeters is provided, and a spacer is inserted to fill the space so as not to move due to transportation or electromagnetic mechanical force. An example of a single-phase transformer using such a wound core is described in Patent Document 1.

That is, in Patent Document 1, after inserting the iron core 1 into the coil 2 , a lower clamp 5 supporting the iron core 1 and an upper clamp 4 provided on the upper part of the iron core 1 are arranged, and then the iron band 6 is attached to the iron core 1 and the coil 2 . Transformer contents support device configured by inserting between and through band insertion holes (17a, 17b, 18a, 18b) provided in upper clamp 4 and lower clamp 5, and then tightening iron band 6 , a support plate 7 whose length dimension is substantially the same as the core height of the core 1 or longer than the core height is inserted into the side surface of the core 1 between the core 1 and the coil 2 inserted in the coil 2, and when tightening the iron band A transformer core support structure is disclosed in which the upper clamp 4 and lower clamp 5 and the support plate 7 form a box shape.

JP 2006-294673 A

In the transformer core support structure of Patent Document 1, the support plate is arranged side by side with the duct and the steel band on the side surface of the wound core in the lamination direction, so the width of the support plate is limited. Therefore, it may not be possible to ensure sufficient strength. For example, in a single-phase transformer, the upper clamp may tilt due to the shape of the iron core and coil. In particular, when installing the upper transformer in a V-connection transformer, the upper transformer will be placed on top of the lower transformer, so depending on the dimensional variation of the lower transformer part (core and coil) The angle of the top bracket of the lower tier may not be parallel to the ground. Therefore, when installing the transformer on the upper stage, the upper transformer will tilt, and work for position adjustment will be required. In addition, as the fastener tilts, the positions of the case and the transformer fixing portion are displaced, and the upper transformer portion approaches the inner surface of the case, which may make it difficult to secure an appropriate insulation distance.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the fixing strength of a wound core type transformer.

According to the present invention, the following transformers are provided. The transformer includes a coil, a wound core, fasteners, and spacers. A wound core is inserted into the coil. The fastener has a concave shape, is arranged on the upper surface side and the lower surface side of the wound core, and covers and fixes the upper surface side and the lower surface side of the wound core. The spacer is arranged between the wound core and the fastener and inserted between the coil and the wound core. Also, the spacer is inserted on the winding surface side of the wound core.

Further, according to the present invention, there is provided a V-connected multistage transformer in which the transformer is arranged in the lower stage.

Advantageous Effects of Invention According to the present invention, it is possible to improve the content fixing strength of a wound core type transformer.

The figure which shows an example of the structure inside the V-connection multistage transformer which inserted the spacer and coil support. The figure which shows an example of the structure of a spacer and a coil support. The figure which shows the insertion of the spacer in a single-phase transformer. The figure which shows an example of the structure of a spacer and a coil support. The figure which shows an example of the structure of a spacer and a coil support. The figure which shows an example of the structure of a spacer and a coil support. The figure which shows an example of the structure of a spacer and a coil support.

Each embodiment will be described in detail below using a transformer as an example of a stationary device of the present invention.

First, a first embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a diagram showing an example of the internal structure of a V-connected multistage transformer in which a pacer/coil support is inserted. FIG. 2 is a diagram showing an example of a spacer-cum-coil support structure in a single-phase transformer and a V-connection multistage transformer.

A V-connected multistage transformer includes a plurality of transformers. As shown in FIG. 1, in this embodiment, the V-connection multi-stage transformer includes upper and lower two-stage transformers, and the size of the upper-stage transformer is smaller than that of the lower-stage transformer. Each stage transformer includes a coil 101 and a wound core 102 , and the wound core 102 is inserted into the coil 101 . The wound core 102 is fixed by an upper fastener 103 and a lower fastener 104 .

The top fastener 103 has a concave shape covering the upper surface side of the wound core 102, and the upper part of the wound core 102 is fitted into the recess. The lower fastener 104 has a concave shape covering the lower surface side of the wound core 102, and the lower part of the wound core 102 is fitted in the recess.

In addition, a space S into which a later-described spacer-cum-coil support 301 is inserted between the wound core 102 and the upper clamp fitting 103 with the wound core 102 fitted in the recess of the upper clamp fitting 103 of the lower transformer. formed. Similarly, a space S into which a spacer/coil support 301, which will be described later, is inserted between the wound core 102 and the lower clamping member 104 in a state where the wound core 102 is fitted in the recess of the lower clamping member 104 of the lower transformer. is formed.

In this embodiment, the size of the bottom clamps 104 of the upper transformer is smaller than the size of the bottom clamps 104 of the lower transformer. The top fasteners 103 of the lower transformer, the bottom fasteners 104 of the lower transformer, and the top fasteners 103 of the upper transformer have the same size. And these (upper fasteners 103 of the lower transformer, lower fasteners 104 of the lower transformer, and upper fasteners 103 of the upper transformer) are connected by connecting fittings 105 provided on the end side, respectively. It is connected.

In the lower transformer, a spacer/coil support 301 is inserted between the side surface of the wound core 102 in the direction of the winding axis (the side on which the winding is visible and is sometimes called the winding surface side) and the coil 101. It is Specifically, as shown in the AA cross-sectional view of FIG. 1, a spacer/coil support 301 is inserted at each position on the winding surface side of the wound core 102 .

As shown in FIG. 2, the spacer/coil support 301 includes a vertical plate 301a and a horizontal plate 301b. The horizontal plate 301b is fixed to the vertical plate 301a so as to be orthogonal to the vertical plate 301a while being in contact with and intersecting with the vertical plate 301a.

One end of the vertical plate 301 a of the spacer/coil support 301 is in contact with the upper fastener 103 . Also, the other tip is in contact with the lower metal fitting 104 . Thus, the vertical plate 301a of the spacer/coil support 301 has a length such that both ends thereof contact the upper fastener 103 and the lower fastener 104. As shown in FIG.

In the present embodiment, the vertical plate 301a of the spacer/coil support 301 inserted between the wound core 102 and the coil 101 is not fixed to the upper fastener 103 and the lower fastener 104, but is inserted into contact with the wound core. The movement of 102 can be restrained softly.

In this embodiment, the vertical plates 301 a of the spacer/coil support 301 are arranged on both sides of the wound surface of the wound core 102 . That is, since a plurality of spacers/coil supports 301 are arranged near the core leg 102a, a good structure for supporting the upper fastener 103 is formed by the spacers/coil supports 301 on both sides of the winding surface.

In addition, in this embodiment, the vertical plate 301a of the spacer-cum-coil support 301 of the lower transformer is arranged directly below (immediately below) the lower fastener 104 of the upper transformer, so that the structure is even stronger. It's becoming

The horizontal plate 301b of the spacer/coil support 301 is provided so as to straddle the coil 101 and along the coil 101 with the vertical plate 301a inserted. The horizontal plates 301b are arranged to sandwich the coil 101 from above and below, thereby supporting the coil 101 in the vertical direction. As described above, the spacer/coil support 301 of the present embodiment supports the wound core 102 and the coil 101 with a high-strength grid structure at a position near the core leg 102a. tilt can be suppressed. In particular, since each plate is a single plate, it is possible to absorb the movement of each wound core 102 as a whole.

In this embodiment, a structure using a plurality of spacers/coil supports 301 in which one horizontal plate is fixed to one vertical plate shown in FIG. 2 is realized. , can be appropriately changed as described later.

Next, a second embodiment will be described with reference to FIG. Contents similar to those already explained may be omitted. FIG. 3 is a diagram showing spacer insertion in a single-phase transformer. The difference from the first embodiment is that there is no transformer on the upper side and that the spacer/coil support 301 is a spacer 201 without a horizontal plate.

If the mass of the coil 101 is light and no coil support is required, the cross plates may be omitted. Even if the horizontal plate is omitted, the tip of the spacer 201 has a length that contacts the top fastener 103 and the bottom fastener 104, and the strength is improved, so the tilt of the top fastener 103 is suppressed. It is possible to

Next, a third embodiment will be described with reference to FIGS. 4 to 7. FIG. Contents similar to those already explained may be omitted. 4 to 7 show structural examples of spacers and coil supports in single-phase transformers and V-connected multistage transformers. In the third embodiment, a plurality of structural examples of spacers and coil supports will be described.

A spacer/coil support 401 shown in FIG. 4 has a structure in which a plurality of (two in this example) horizontal plates 401b are fixed to one vertical plate 401a. One horizontal plate 401b is positioned between the upper fastener 103 and the coil 101 and is fixed to the vertical plate 401a along the coil 101. The other horizontal plate 401b is positioned between the lower fastener 104 and the coil 101. It is positioned and fixed to the vertical plate 401 a along the coil 101 . By using the spacer/coil support 401 to which the plurality of horizontal plates 401b that support the coil 101 in the vertical direction are fixed, a high-strength parallel cross structure can be realized.

A spacer/coil support 501 shown in FIG. 5 has a structure in which one horizontal plate 501b is fixed to one vertical plate 501a, as in the case of the first embodiment. This spacer/coil support 501 differs from the first embodiment in that the dimension of the horizontal plate 501b is changed. In other words, the horizontal plate serving as the spacer and coil support may appropriately support the coil 101, and its length, width and thickness may be changed as appropriate. The length of the horizontal plate 501 b may be set, for example, along at least a portion of the coil 101 or across at least a portion of the coil 101 . Also, the length of the horizontal plate 501b may be set so as to extend along the entire coil 101 or straddle the entire coil 101, for example.

A spacer/coil support 601 shown in FIG. 6 is composed of a single vertical plate 601a with the horizontal plate omitted. Both end sides of the spacer/coil support 601 are thicker than the thickness therebetween. Specifically, the spacer/coil support 601 has a length such that both end sides are located outside the coil 101 when inserted into the coil 101 . In this spacer/coil support 601, the thickness of the portion positioned outside the coil 101 is increased, and the thickness of this portion (thick portion 601b) is set so as to follow at least a portion of the coil 101. It is In this way, by increasing the plate thickness of the vertical plate 601 a instead of the horizontal plate, the coil 101 may be supported by forming a portion that spans the coil 101 .

A spacer/coil support 701 shown in FIG. 7 is composed of a single vertical plate 701a and has a structure in which only one end is thickened (that is, a thick portion 701b is formed only on one end). In this manner, the spacer/coil support 701 having a structure in which only one side of the vertical plate 701a is thickened may be appropriately provided in consideration of, for example, the load and dimensions of the coil 101, the installation state, and the like.

In this embodiment, various structural examples of the spacer/coil support have been described, but the structure of the spacer/coil support may be changed as appropriate, and may be a different structure.

Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, it is possible to add, delete, or replace some of the configurations of the embodiments with other configurations.

The fasteners (upper fastener 103 and lower fastener 104) need only form a space S between the wound core 102 and the wound core 102 into which spacers or spacers/coil supports are inserted, and then fix the wound core 102. can be used as a fixing bracket. The fastener can be, for example, a suitable clamp capable of clamping and securing the wound core 102 .

The connecting fitting 105 is sandwiched between the top fastening fitting 103 and the bottom fastening fitting 104 by moving the top fastening fitting 103 and pressing it against the wound core 102 and moving the bottom fastening fitting 104 to press contact with the wound core 102 . A configuration including a tightening mechanism for fixing the iron core 102 may be employed.

101 Coil 102 Wound core 103 Top fastener 104 Bottom fastener 105 Connection metal fitting 201 Spacer 301 Spacer/coil support 401 Spacer/coil support 501 Spacer/coil support 601 Spacer/coil support 701 Spacer/coil support

Claims (12)

a coil;
a wound core inserted into the coil;
a fastener that has a concave shape, is arranged on the upper surface side and the lower surface side of the wound core, and covers and fixes the upper surface side and the lower surface side of the wound core;
a spacer disposed between the wound core and the fastener and inserted between the coil and the wound core;
with
The spacer is
inserted into the winding surface side of the wound core,
A transformer characterized by: A transformer according to claim 1, wherein
The spacer is
having a length such that the tip contacts the fastener,
A transformer characterized by: A transformer according to claim 1, wherein
The spacer is
comprising a vertical plate and a horizontal plate,
The vertical plate is
inserted between the coil and the wound core,
The horizontal plate is
arranged along the coil,
A transformer characterized by: A transformer according to claim 1, wherein
one or both ends of the spacer,
positioned outside the coil and having a thickness along at least a portion of the coil;
A transformer characterized by: A V-connection multistage transformer in which the transformer according to claim 1 is arranged in the lower stage. A V-connection multistage transformer in which the transformer according to claim 2 is arranged in the lower stage. A V-connection multistage transformer in which the transformer according to claim 3 is arranged in the lower stage. A V-connected multistage transformer in which the transformer according to claim 4 is arranged in the lower stage. The V-connected multistage transformer according to claim 5,
The upper transformer has upper and lower clamps,
The spacer is
Arranged directly below the lower fastener,
A V-connection multistage transformer characterized by: The V-connected multistage transformer according to claim 6,
The upper transformer has upper and lower clamps,
The spacer is
Arranged directly below the lower fastener,
A V-connection multistage transformer characterized by: The V-connected multistage transformer according to claim 7,
The upper transformer has upper and lower clamps,
The vertical plate of the spacer is
Arranged directly below the lower fastener,
A V-connection multistage transformer characterized by: The V-connected multistage transformer according to claim 8,
The upper transformer has upper and lower clamps,
The spacer is
Arranged directly below the lower fastener,
A V-connection multistage transformer characterized by:

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