CN211907193U - Low-voltage lead structure and transformer thereof - Google Patents

Abstract

The application discloses a low-voltage lead structure and a transformer thereof, which are applied to a three-dimensional wound core transformer and comprise a first coil, a second coil and a third coil, and further comprise a first conductive bar, a second conductive bar and a third conductive bar, wherein the first conductive bar and the third conductive bar are arranged on the outer side of the three-dimensional wound core, the second conductive bar is arranged on the inner side of the three-dimensional wound core, the first conductive bar, the second conductive bar and the third conductive bar are connected with the low-voltage lead of the corresponding coil, one end for being connected with external equipment is arranged on the upper side of a core frame between the first coil and the third coil, the first conductive bar and the third conductive bar are arranged on the outer side, the second conductive bar is arranged on the inner side, the distance between the first conductive bar and the core frame is greatly shortened, and the connection with each coil can be completed only by using the conductive bar with small specification under the condition that the length of the low-voltage lead of each coil is the same, the method is favorable for realizing the balance of three-phase resistors and reduces the manufacturing cost.

Description

Low-voltage lead structure and transformer thereof

Technical Field

The application relates to the technical field of power equipment, in particular to a low-voltage lead structure and a transformer thereof.

Background

The three-dimensional wound core transformer has the advantages of balanced three-phase magnetic circuit, low loss, low noise, strong short-circuit resistance and the like, and is favored by more and more users. The common three-dimensional wound core is a triangular three-dimensional wound core, namely, the three-dimensional wound core is formed by splicing 3 same core frames pairwise, and is in an equilateral triangle from a top view. The three-dimensional wound core transformer is mainly connected with the outside through low-voltage leads arranged on a three-phase coil, the traditional low-voltage leads are led out from the outer side of the transformer body, but the low-voltage leads must be led out to one of iron core frames due to the fact that external wiring is convenient, and the three-dimensional wound core is of a triangular structure, so that the lengths of the low-voltage leads are different, and further three-phase resistance imbalance is caused. In order to solve the problem, the existing scheme usually adopts a large-specification conductive bar to be connected with the low-voltage lead of each coil, so that the requirement of resistance balance is met, but the large-specification conductive bar is difficult to manufacture, the production efficiency is influenced, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The application aims to solve at least one of technical problems in the prior art, and provides a low-voltage lead structure and a transformer thereof, which can realize three-phase resistance balance and reduce cost.

The utility model provides a first aspect provides a low pressure lead structure for three-dimensional wound core transformer, three-dimensional wound core transformer is including three-dimensional wound core, be provided with first coil, second coil and third coil, its characterized in that between the iron core frame of three-dimensional wound core: the three-dimensional wound core comprises a first coil, a second coil, a third coil and a third coil, and further comprises a first conductive bar connected with a low-voltage lead of the first coil, a second conductive bar connected with a low-voltage lead of the second coil and a third conductive bar connected with a low-voltage lead of the third coil, wherein the first conductive bar and the third conductive bar are arranged on the outer side of the three-dimensional wound core, the second conductive bar is arranged on the inner side of the three-dimensional wound core, and one ends of the first conductive bar, the second conductive bar and the third conductive bar, which are used for being connected with external equipment, are arranged on the upper side of a core frame between the first coil and the third coil.

One or more technical schemes provided in the embodiment of the application have at least the following beneficial effects: the application adopts a low-voltage lead structure for a three-dimensional wound core transformer, the three-dimensional wound core transformer comprises a three-dimensional wound core, a first coil, a second coil and a third coil are arranged between core frames of the three-dimensional wound core, the three-dimensional wound core transformer further comprises a first conductive bar, a second conductive bar and a third conductive bar, the first conductive bar and the third conductive bar are arranged at the outer side of the three-dimensional wound core, the second conductive bar is arranged at the inner side of the three-dimensional wound core, one end of the first conductive bar, one end of the second conductive bar and one end of the third conductive bar are connected with a low-voltage lead of a corresponding coil, one end for being connected with the outside are arranged at the upper side of the core frame between the first coil and the third coil, the first conductive bar and the third conductive bar are arranged at the outer side, the second conductive bar is arranged at the inner side, and the distance between the second conductive bar and the core frame can be greatly shortened, the first wire row and the third wire row are positioned on two sides of the iron core frame, and under the condition that the lengths of the low-voltage leads of the coils are the same, the connection with the coils can be completed only by using the small-specification conducting bar, so that the three-phase resistance balance is favorably realized, the small-specification conducting bar is simple to manufacture, and the manufacturing cost is also reduced.

Further, the first conductive bar comprises a first head end conductive bar and a first tail end conductive bar which are respectively connected with the low-voltage head end and the low-voltage tail end of the first coil; the second conductive bar comprises a second head end conductive bar and a second tail end conductive bar which are respectively connected with the low-voltage head end and the low-voltage tail end of the second coil; the third conductive bar comprises a third head end conductive bar and a third tail end conductive bar which are respectively connected with the low-voltage head end and the low-voltage tail end of the third coil.

Further, the first head end conductive bar, the second head end conductive bar and the third head end conductive bar are respectively connected with a flexible connection.

Further, the first tail conductive bar, the second tail conductive bar and the third tail conductive bar are connected to a fourth conductive bar.

The three-dimensional wound core is characterized by further comprising a first clamping piece, wherein the first clamping piece is arranged on the upper side of the core frame of the three-dimensional wound core, and the first clamping pieces in the two adjacent core frames are fixedly connected.

Furthermore, a plurality of fixing portions and extending portions are arranged in the first clamping piece, the first conductive bar and the third conductive bar are fixedly connected to the fixing portions, and the second conductive bar and the extending portions are fixedly connected to the inner side of the core frame.

The first conductive bar and the third conductive bar are fixedly connected to the fixing portion through the connecting pieces, and the second conductive bar is fixedly connected to the inner side of the core frame through the connecting pieces and the extending portion.

The second clamping piece is arranged on the lower side of the core column of the three-dimensional wound core, and the second clamping pieces in the two adjacent core frames are fixedly connected.

And furthermore, the first clamping piece and the second clamping piece which are arranged on the same iron core frame are fixedly connected through a connecting rod.

In a second aspect, the present application also provides a transformer comprising a low voltage lead structure as described above.

One or more technical schemes provided in the embodiment of the application have at least the following beneficial effects: the transformer comprises a three-dimensional wound core, a first coil, a second coil and a third coil, and further comprises a first conductive bar, a second conductive bar and a third conductive bar, wherein the first conductive bar and the third conductive bar are arranged on the outer side of the three-dimensional wound core, the second conductive bar is arranged on the inner side of the three-dimensional wound core, the first conductive bar, the second conductive bar and the third conductive bar are connected with low-voltage leads of corresponding coils, one end for being connected with external equipment is arranged on the upper side of the core frame between the first coil and the third coil, the first conductive bar and the third conductive bar are arranged on the outer side, the second conductive bar is arranged on the inner side, the distance between the second conductive bar and the core frame can be greatly shortened by arranging the second conductive bar on the inner side, and the first conductive bar and the third conductive bar are arranged on two sides of the core frame, under the condition that the lengths of the low-voltage leads of the coils are the same, the connection with the coils can be completed only by using the small-specification conducting bar, the three-phase resistance balance is favorably realized, the small-specification conducting bar is simple to manufacture, and the manufacturing cost is also reduced.

Drawings

The present application is further described with reference to the following figures and examples;

FIG. 1 is a perspective view of one embodiment of the present application;

FIG. 2 is a top view of another embodiment of the present application;

FIG. 3 is a schematic view of the structure taken along the direction A in FIG. 1;

FIG. 4 is a schematic view of the structure taken along the direction B in FIG. 1;

FIG. 5 is a schematic top view of a three-phase coil according to another embodiment of the present application;

fig. 6 is a perspective view of a three-dimensional wound core according to another embodiment of the present application.

Detailed Description

Reference will now be made in detail to the present embodiments of the present application, preferred embodiments of which are illustrated in the accompanying drawings, which are for the purpose of visually supplementing the description with figures and detailed description, so as to enable a person skilled in the art to visually and visually understand each and every feature and technical solution of the present application, but not to limit the scope of the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present number, and larger, smaller, inner, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

Referring to fig. 1-4, 6, one embodiment of the present application provides a low voltage lead configuration, the stereoscopic wound core transformer comprises a stereoscopic wound core 400, wherein a first coil 110, a second coil 210 and a third coil 310 are arranged between core frames of the stereoscopic wound core 400, the stereoscopic wound core further comprises a first conductive bar 120 connected to a low-voltage lead of the first coil 110, a second conductive bar 220 connected to a low-voltage lead of the second coil 210, and a third conductive bar 320 connected to a low-voltage lead of the third coil 310, the first conductive bar 120 and the third conductive bar 320 are arranged at the outer side of the stereoscopic wound core 400, the second conductive bar 220 is arranged at the inner side of the stereoscopic wound core 400, and one ends of the first conductive bar 120, the second conductive bar 220 and the third conductive bar 320, which are used for being connected with external equipment, are arranged at the upper side of the core frame between the first coil 110 and the third coil 310.

In an embodiment, the first coil 110, the second coil 210, and the third coil 310 may be any coil commonly known in the art, and the present application does not relate to improvement of the coils, and it is sufficient to ensure that the three coils are the same, and the description is omitted here.

In an embodiment, it is preferable that the output ends of the first, second, and third conductive bars 120, 220, and 320 are disposed on the upper side of the core frame between the first coil 110 and the third coil 310 in this embodiment, because the three-dimensional wound core 400 includes 3 identical core frames, a person skilled in the art can select any one of the core frames as the location of the output end according to actual needs, and the conductive bar of the coil opposite to the core frame is disposed on the inner side of the three-dimensional wound core 400, for example, the core frame between the first coil 110 and the second coil 120 is selected as the location of the output end, and then the third conductive bar 320 in this embodiment is disposed on the inner side of the three-dimensional wound core 400, and the first conductive bar 120 and the second conductive bar 220 are disposed on the outer side of the three-dimensional wound core, which is not described herein again.

In an embodiment, since the second conducting bar 220 is disposed on the inner side of the three-dimensional wound core 400 in this embodiment, the shape of the second conducting bar 220 may be different from the shape of the first conducting bar 120 and the shape of the third conducting bar 320, which can avoid contacting the core frame, thereby avoiding the core frame from being touched by mistake and affecting the function of the transformer, and the specific shapes of the three conducting bars are adjusted according to the actual shape of the three-dimensional wound core 400, which is not described herein again.

In an embodiment, the three-dimensional wound core may have any shape, for example, as shown in fig. 6, the core frame of the three-dimensional wound core 400 may be formed by winding an electrical steel strip or an amorphous strip, to obtain three rectangular core frames with approximately semicircular core-post cross-sections and identical geometric dimensions, and the specific shape of the core frame may be adjusted according to actual requirements, so as to satisfy the requirement of being composed of 3 identical core frames, which is not described herein again.

Referring to fig. 1, 4 and 5, in another embodiment of the present application, the first conductive bar 120 includes a first head end conductive bar 121 and a first tail end conductive bar 122 connected to a low voltage head end and a low voltage tail end of the first coil 110, respectively; the second conductive bar 220 includes a second head end conductive bar 221 and a second tail end conductive bar 222 connected to the low voltage head end and the low voltage tail end of the second coil 210, respectively; the third conductive bar 320 includes a third head end conductive bar 321 and a third tail end conductive bar 322 connected to the low voltage head end and the low voltage tail end of the third coil 310, respectively.

In an embodiment, since the low-voltage lead is divided into a low-voltage head end and a low-voltage tail end, in order to avoid short circuit of the line, it is preferable that each end of the embodiment is connected with one conductive bar, and the arrangement manner of the specific conductive bar is adjusted according to actual requirements.

In one embodiment, as shown in fig. 5, since each conductive bar is connected to the upper side of the core frame between the first coil 110 and the third coil 310, the second leading conductive bar 221 and the second trailing conductive bar 222 can be disposed at a side of the second coil 220 close to the core frame, so as to reduce the distance from the core frame.

Referring to fig. 1 and 3, in another embodiment of the present application, the first, second and third head end conductive rows 121, 221 and 321 are respectively connected with a flexible connection 520.

In an embodiment, since the low-voltage lead of the three-dimensional wound core needs to be connected to an external transformer, and the flexible connection and the transformer bushing are commonly used means, the flexible connection 520 may be connected to the first head-end conductive bar 121, the second head-end conductive bar 221, and the third head-end conductive bar 321, and the type of the flexible connection 520 may be selected according to actual requirements, and is not described herein again. It is understood that 3 flexible connectors 520 may be arranged side by side in the same direction, as shown in fig. 3, to facilitate connection to the outside.

In another embodiment of the present application, the first tail conductive row 122, the second tail conductive row 222, and the third tail conductive row 322 are connected to the fourth conductive row 510.

In an embodiment, as those skilled in the art can understand, the low-voltage tail ends of the coils need to be connected to each other, and therefore, the fourth conductive bar 510 may be connected to the first tail end conductive bar 122, the second tail end conductive bar 222, and the third tail end conductive bar 322, and the fourth conductive bar 510 may be disposed at any position, for example, the lower side of each head end conductive bar in this embodiment, so that the wiring concentration can be implemented, and the subsequent maintenance is facilitated.

Referring to fig. 1 to 4, in another embodiment of the present application, a first clip 410 is further included, the first clip 410 is disposed on an upper side of a core frame of a three-dimensional wound core 400, and the first clips 410 of two adjacent core frames are fixedly connected.

In an embodiment, the first clip 410 is arranged to fix and support the three-dimensional wound core and the coil, and a specific type of the clip is selected according to actual requirements, which is not limited in the embodiment of the present application.

In an embodiment, the first clamping pieces 410 in two adjacent core frames may be fixedly connected by bolts or the like, and a specific connecting piece is selected according to actual requirements, which is not described herein again.

In another embodiment of the present application, the first clip 410 is provided with a plurality of fixing portions 411 and extension portions 413, the first conductive bar 120 and the third conductive bar 320 are fixedly connected to the fixing portions 411, and the second conductive bar 220 and the extension portions 413 are fixedly connected to the inner side of the core frame.

Referring to fig. 1 and 2, in an embodiment, the number and the pitch of the fixing portions 411 may be adjusted according to the shape of the first conductive bar 120 and the third conductive bar 320, and the fixing connection may be implemented by bolts or the like, which is not described herein again.

In an embodiment, since the second conductive bar 220 is disposed on the inner side of the core frame, in order to fix the second conductive bar 220, the extension portion 413 integrally formed on the first clip 410 may be wound around the upper side to the inner side of the core frame, or fixed in other manners, which will not be described herein again.

In another embodiment of the present application, the connector 412 is further included, the first conductive bar 120 and the third conductive bar 320 are fixedly connected to the fixing portion 411 through the connector 412, and the second conductive bar 220 is fixedly connected to the inner side of the core frame through the connector 412 and the extension portion 413.

In an embodiment, the first conductive bar 120 and the third conductive bar 320 can be fixedly connected to the fixing portion 411 through the connecting member 412, so that the stability of the first conductive bar 120 and the third conductive bar 320 can be enhanced, and the deviation during the use process can be avoided.

Referring to fig. 1 and 4, in another embodiment of the present application, the first clip member 410 is further provided with an extension portion 413, and the second conductive bar 220 is fixedly connected to the inner side of the core frame by a connection member 412 and the extension portion 413.

Referring to fig. 1 to 4, in another embodiment of the present application, a second clip 420 is further included, the second clip 420 is disposed at a lower side of a core leg of the stereoscopic wound core 400, and the second clips 420 of two adjacent core frames are fixedly connected.

Based on above-mentioned embodiment, the upside of core frame has realized fixedly through first folder 410, in order to fix the downside of core frame, can adopt second folder 420 fixed connection's mode, avoids not hard up of core frame in the use or the transportation, improves the stability of product, specific second folder 420 type according to actual demand select can, no longer describe here.

In another embodiment of the present application, the first clamping member 410 and the second clamping member 420 disposed on the same core frame are fixedly connected by a connecting rod 430.

Based on the above embodiment, the connecting rod 430 is fixedly connected between the first clip member 410 and the second clip member 420, so that the firmness of the core frame can be further enhanced.

Another embodiment of the present application also provides a transformer including the low voltage lead structure as above.

In one embodiment, the transformer using the low voltage lead structure comprises a first coil, a second coil and a third coil arranged between core frames of a three-dimensional wound core, and further comprises a first conductive bar, a second conductive bar and a third conductive bar, the first conductive bar and the third conductive bar are arranged at the outer side of the three-dimensional wound core, the second conductive bar is arranged at the inner side of the three-dimensional wound core, the first conductive bar, the second conductive bar and the third conductive bar are connected with low voltage leads of corresponding coils, one end for connecting with external equipment is arranged at the upper side of the core frame between the first coil and the third coil, the first conductive bar and the third conductive bar are arranged at the outer side, the second conductive bar is arranged at the inner side, the distance between the second conductive bar and the core frame can be greatly shortened by arranging the second conductive bar at the inner side, the first conductive bar and the third conductive bar are arranged at two sides of the core frame, and under the condition that the lengths of the low voltage leads of the coils are the same, the connection with each coil can be completed only by using the conductive bar with small specification, which is beneficial to realizing the balance of three-phase resistance, and the conductive bar with small specification is simple to manufacture, and the manufacturing cost is also reduced.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application.

Claims (10)

1. The utility model provides a low pressure pin configuration for three-dimensional wound core transformer, three-dimensional wound core transformer is including three-dimensional wound core, be provided with first coil, second coil and third coil between the iron core frame of three-dimensional wound core, its characterized in that: the three-dimensional wound core comprises a first coil, a second coil, a third coil and a third coil, and further comprises a first conductive bar connected with a low-voltage lead of the first coil, a second conductive bar connected with a low-voltage lead of the second coil and a third conductive bar connected with a low-voltage lead of the third coil, wherein the first conductive bar and the third conductive bar are arranged on the outer side of the three-dimensional wound core, the second conductive bar is arranged on the inner side of the three-dimensional wound core, and one ends of the first conductive bar, the second conductive bar and the third conductive bar, which are used for being connected with external equipment, are arranged on the upper side of a core frame between the first coil and the third coil.

2. A low voltage lead configuration according to claim 1, wherein: the first conductive bar comprises a first head end conductive bar and a first tail end conductive bar which are respectively connected with the low-voltage head end and the low-voltage tail end of the first coil; the second conductive bar comprises a second head end conductive bar and a second tail end conductive bar which are respectively connected with the low-voltage head end and the low-voltage tail end of the second coil; the third conductive bar comprises a third head end conductive bar and a third tail end conductive bar which are respectively connected with the low-voltage head end and the low-voltage tail end of the third coil.

3. A low voltage lead configuration according to claim 2, wherein: the first head end conductive bar, the second head end conductive bar and the third head end conductive bar are respectively connected with a flexible connection.

4. A low voltage lead configuration according to claim 2, wherein: the first, second and third tail conductive bars are connected to a fourth conductive bar.

5. A low voltage lead configuration according to claim 1, wherein: the three-dimensional wound core is characterized by further comprising first clamping pieces, the first clamping pieces are arranged on the upper side of the core frame of the three-dimensional wound core, and the first clamping pieces in the two adjacent core frames are fixedly connected.

6. A low voltage lead configuration according to claim 5, wherein: the first clamping piece is internally provided with a plurality of fixing parts and extending parts, the first conductive bar and the third conductive bar are fixedly connected to the fixing parts, and the second conductive bar and the extending parts are fixedly connected to the inner side of the core frame.

7. A low voltage lead configuration according to claim 6, wherein: the first conductive bar and the third conductive bar are fixedly connected to the fixing portion through the connecting piece, and the second conductive bar is fixedly connected to the inner side of the core frame through the connecting piece and the extending portion.

8. A low voltage lead configuration according to claim 5, wherein: the second clamping piece is arranged on the lower side of the core column of the three-dimensional wound core, and the second clamping pieces in the two adjacent core frames are fixedly connected.

9. A low voltage lead configuration according to claim 8, wherein: and the first clamping piece and the second clamping piece which are arranged on the same iron core frame are fixedly connected through a connecting rod.

10. A transformer, characterized by: comprising a low voltage lead structure according to any of claims 1-9.

Images