A low-voltage angle-connected outgoing line structure of transformer and transformer

Abstract

The utility model discloses a low-voltage angle-connected outlet structure of a transformer and a transformer, and relates to the technical field of low-voltage angle connection of transformers. The wiring method of the low-voltage coil of the low-voltage angle-connected outlet structure is angle connection, and the low-voltage coil is anti-parallel in the same phase, and the two bridge arm ends of the same phase of each branch of the two parallel branches with opposite currents in each phase are respectively arranged at the lead-out ends of different phases; each connection end of each phase of the low-voltage coil is connected to a vertical row; the other end of the vertical row is connected to the upper end of the wiring piece; the lower end of the wiring piece is connected to the upper end of the outlet copper bar; the outlet copper bars are connected by low-voltage leads to form an angle connection. The angle connection structure of the utility model reduces the selection specifications of the vertical row by half, and reduces the eddy current loss at the end of the transformer. At the same time, because the angle connection is on the outlet copper bar, the distance between the vertical row and the low-voltage coil can be more compact, which can reduce the length of the low-voltage coil outlet and reduce the coil resistance loss.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage angle connection of transformers, and particularly relates to a low-voltage angle connection outlet structure of a transformer and a transformer. Background Art

[0002] At present, with the rapid development of my country's electrochemical industry, rectifier transformers have also been widely used and developed rapidly. Various new technologies and new structures continue to emerge, which continuously improves the reliability and energy-saving effect of rectifier transformers. At the same time, the structure of the transformer is becoming simpler.

[0003] At present, the low-voltage coil of the transformer is a rectifier transformer with a delta connection and an arm current output, and the low-voltage delta connection output structure adopts Figure 2 This wiring structure is to connect the low-voltage lead wire at an angle to the lower (upper) part of the vertical row, and to connect the low-voltage lead wire at an angle by clamping the two vertical rows. Since the angle connection is made at the upper (lower) part of the vertical row, the leakage magnetic field generated by the angle-connected copper bar and the end leakage magnetic field will be superimposed, which will increase the eddy current loss of the clamps and other metal parts in the transformer. Utility Model Content

[0004] The purpose of the utility model is to provide a low-voltage corner-connected outgoing line structure of a transformer and a transformer, so as to overcome the defect that the leakage magnetic field generated by the corner-connected copper bar of the existing corner-connected structure and the end leakage magnetic field will be superimposed and increase the eddy current loss of the clamps and other metal parts in the transformer. The specific technical scheme is as follows:

[0005] A low-voltage angle-connected outgoing line structure of a transformer, wherein the wiring mode of the low-voltage coil is angle connection, the low-voltage coil is anti-parallel in the same phase, and the two bridge arm ends of the same phase of each branch of two parallel branches with opposite currents in each phase are respectively arranged at the lead-out ends of different phases; each wiring end of each phase of the low-voltage coil is connected to a vertical row; the other end of the vertical row is connected to the upper end of a wiring piece; the lower end of the wiring piece is connected to the upper end of an outgoing copper bar; the outgoing copper bars are connected by low-voltage leads to form an angle connection.

[0006] Preferably, the outlet copper bars are connected by low-voltage leads to form a corner connection, which includes:

[0007] The outgoing copper bar connected to the A-phase lead-out terminal and the outgoing copper bar connected to the B-phase lead-out terminal are connected through the low-voltage lead to form a corner connection;

[0008] The outgoing copper bar connected to the B-phase lead-out terminal and the outgoing copper bar connected to the C-phase lead-out terminal are connected via the low-voltage lead to form a corner connection;

[0009] The outgoing copper busbar connected to the C-phase lead-out terminal and the outgoing copper busbar connected to the A-phase lead-out terminal are connected through the low-voltage lead to form a corner connection.

[0010] Preferably, the vertical row has wires coming out from the middle, and the connection terminal of the low-voltage coil is connected to the middle wire outlet at the top of the vertical row.

[0011] Preferably, the wiring piece is of a forked design; the unforked end of the wiring piece is connected to the lower end of the vertical row; the forked end of the wiring piece is connected to the upper end of the outgoing copper bus, and the outgoing copper bus is connected to the forked opening of the wiring piece.

[0012] Preferably, it also includes an outgoing line fixing piece; the outgoing line fixing piece is connected to the transformer body; the outgoing line fixing piece is provided with a fixing frame adapted to each of the outgoing line copper bars, and each of the outgoing line copper bars passes through the fixing frame.

[0013] A transformer comprises the low-voltage angle-connected outgoing line structure of the above-mentioned transformer.

[0014] Compared with the existing technology, the utility model has the following beneficial effects:

[0015] 1. A low-voltage corner-connected outgoing line structure of a transformer in the utility model is achieved by connecting a vertical row to each terminal of each phase of the low-voltage coil; the other end of the vertical row is connected to the upper end of the wiring piece; the lower end of the wiring piece is connected to the upper end of the outgoing copper bar; the outgoing copper bars are connected by low-voltage leads to form a corner connection. The corner connection structure of the utility model reduces the selection specifications of the vertical row by half, reducing the eddy current loss at the end of the transformer. At the same time, because the corner connection is on the outgoing copper bar, the distance between the vertical row and the low-voltage coil can be more compact (no need to consider the corner-connected copper bar), which can reduce the length of the low-voltage coil outlet and reduce the coil resistance loss.

[0016] 2. A transformer low-voltage angle-connected outgoing wire structure in the utility model is designed with a forked-type connecting piece; the unforked end of the connecting piece is connected to the lower end of the vertical row; the forked end of the connecting piece is connected to the upper end of the outgoing copper bar, and the outgoing copper bar is connected to the forked opening of the connecting piece. Compared with the existing angle-connected structure, this connecting piece structure requires two connecting pieces for each connection, reduces the selection specifications of the connecting pieces, reduces the eddy current loss at the end of the transformer, and reduces the space of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0018] Figure 1 The utility model is a structural schematic diagram of a low-voltage angle-connected outgoing line structure of a transformer.

[0019] Figure 2 The invention is a structural schematic diagram of a low-voltage angle-connected outgoing line structure of a transformer in the prior art.

[0020] Figure 3 It is an enlarged schematic diagram of the structure of part D of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the angle-connected outlet copper busbar under the K viewing angle of the utility model.

[0022] Figure 5 The utility model is a structural schematic diagram of a low-voltage angle-connected outgoing line structure of a transformer.

[0023] Description of main reference numerals:

[0024] 1- low-voltage coil, 2- vertical row, 3- wiring lug, 4- outgoing copper bus, 5- outgoing wire fixing piece, 6- low-voltage lead, 100- corner connection position of corner copper bus; 20- vertical row in the prior art, 30- wiring lug in the prior art, 40- outgoing copper bus in the prior art, 200- corner connection position of corner copper bus in the prior art. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0029] See the following examples Figures 1 to 5 .

[0030] like Figure 2 The existing low-voltage angle-connected outlet structure requires the low-voltage lead to be angle-connected at the lower (upper) part of the vertical row, and the low-voltage lead is clamped by two vertical rows for angle connection. The position of the angle connection is on the vertical row, and the current of the terminal piece is selected according to the I-arm current, and it is necessary to consider whether the distance between the vertical row and the coil meets the angle connection distance. In this way, the leakage magnetic field generated by the angle-connected copper busbar of the angle-connected structure and the end leakage magnetic field will be superimposed, which will increase the eddy current loss of the clamps and other metal parts in the transformer. The low-voltage angle-connected outlet structure adopted in this application has the low-voltage lead connected to an angle on the outlet copper busbar. The specifications of the angle-connected copper busbar are selected according to the phase current, and the selected specifications of the vertical row are reduced by half, which reduces the eddy current loss at the end of the transformer and reduces the space of the transformer. The specifications of the vertical row only need to meet 0.5 times the I-phase current.

[0031] The embodiment of the present application provides a low-voltage angle-connected output line structure of a transformer, wherein the wiring method of the low-voltage coil is angle connection, the low-voltage coil is inversely parallel in the same phase, and the two bridge arm ends of the same phase of each branch of the two parallel branches with opposite currents in each phase are respectively arranged at the lead-out ends of different phases; each wiring terminal of each phase of the low-voltage coil 1 is connected to a vertical row 2; the other end of the vertical row 2 is connected to the upper end of the wiring piece 3; the lower end of the wiring piece 3 is connected to the upper end of the output copper bus 4; the output copper buses 4 are connected by low-voltage leads 6 to form an angle connection.

[0032] In this embodiment, please refer to FIG. 5 for a delta connection principle diagram, which shows that the two bridge arm ends of the same phase of each branch of two parallel branches with opposite currents in each phase are respectively arranged at the lead-out ends of different phases, and the specific wiring is as follows:

[0033] The bridge arm end a21 of the parallel branch x2 and the bridge arm end a11 of the parallel branch a1 are arranged at the A-phase lead-out terminal of the transformer, and the bridge arm end a22 in phase with the bridge arm end a21 of the parallel branch x2 and the bridge arm end a12 in phase with the bridge arm end a11 of the parallel branch a1 are arranged at the B-phase lead-out terminal of the transformer;

[0034] The bridge arm end b21 of the parallel branch y2 and the bridge arm end b11 of the parallel branch b1 are arranged at the B-phase lead-out terminal of the transformer, and the bridge arm end b22 in phase with the bridge arm end b21 of the parallel branch y2 and the bridge arm end b12 in phase with the bridge arm end b11 of the parallel branch b1 are arranged at the C-phase lead-out terminal of the transformer;

[0035] The bridge arm end c22 of the parallel branch z2 and the bridge arm end c12 of the parallel branch c1 are arranged at the C phase lead-out terminal of the transformer, and the bridge arm end c12 in phase with the bridge arm end c22 of the parallel branch z2 and the bridge arm end c11 in phase with the bridge arm end c12 of the parallel branch C1 are arranged at the A phase lead-out terminal of the transformer.

[0036] In this embodiment, the connection piece 3 is led out from the middle of the low-voltage coil 1 through a vertical row 2. The low-voltage coil 1 is divided into upper and lower parallel connections, and the specifications of the vertical row 2 only need to meet 0.5 times the I-phase current; the specifications of the connection piece 3 are selected according to the I-phase current; the low-voltage lead 6 is connected to the outlet copper bar 4 in an angle connection. In bridge rectification, the relationship between the conversion formulas of various AC currents and DC currents is as follows:

[0037] I phase current = Idn*0.471; I line current = Idn*0.816; I arm current = Idn*0.577; Idn is the DC current.

[0038] The utility model discloses a low-voltage corner-connected outgoing line structure of a transformer, in which a vertical row 2 is connected to each terminal of each phase of the low-voltage coil 1; the other end of the vertical row 2 is connected to the upper end of the connection piece; the lower end of the connection piece 3 is connected to the upper end of the outgoing copper bar 4; the outgoing copper bars 4 are connected by low-voltage leads 6 to form a corner connection. The corner connection structure of the utility model reduces the selection specifications of the vertical row 2 by half, reducing the eddy current loss at the end of the transformer. At the same time, since the corner connection is on the outgoing copper bar 4, the distance between the vertical row 2 and the low-voltage coil 1 can be more compact (no need to consider the corner-connected copper bar), which can reduce the length of the low-voltage coil 1 and reduce the coil resistance loss.

[0039] Specifically, in one embodiment of the present application, the outlet copper bars 4 are connected by low-voltage leads 6 to form a corner connection, which includes:

[0040] The outgoing copper bar connected to the A-phase lead-out terminal and the outgoing copper bar connected to the B-phase lead-out terminal are connected through the low-voltage lead to form a corner connection, specifically:

[0041] The outgoing copper bar 4 connected to the bridge arm end a21 of the A phase lead-out terminal and the outgoing copper bar 4 connected to the bridge arm end a22 of the B phase lead-out terminal are connected through the low-voltage lead 6 to form a corner connection;

[0042] The outgoing copper busbar 4 connected to the bridge arm end a11 of the A-phase lead-out terminal and the outgoing copper busbar 4 connected to the bridge arm end a12 of the B-phase lead-out terminal are connected via the low-voltage lead wire 6 to form a corner connection.

[0043] The outgoing copper bar connected to the B-phase lead-out terminal and the outgoing copper bar connected to the C-phase lead-out terminal are connected through the low-voltage lead to form a corner connection, specifically:

[0044] The outgoing copper bar 4 connected to the bridge arm end b11 of the B phase lead-out terminal and the outgoing copper bar 4 connected to the bridge arm end b12 of the C phase lead-out terminal are connected through the low-voltage lead 6 to form a corner connection;

[0045] The outgoing copper busbar 4 connected to the bridge arm end b21 of the B-phase lead-out terminal and the outgoing copper busbar 4 connected to the bridge arm end b22 of the C-phase lead-out terminal are connected through the low-voltage lead wire 6 to form a corner connection.

[0046] The outgoing copper bar connected to the C phase lead-out terminal and the outgoing copper bar connected to the A phase lead-out terminal are connected through the low-voltage lead to form a corner connection, specifically:

[0047] The outgoing copper bar 4 connected to the bridge arm end c22 of the C phase lead-out terminal and the outgoing copper bar 4 connected to the bridge arm end c21 of the A phase lead-out terminal are connected through the low-voltage lead 6 to form a corner connection;

[0048] The outgoing copper busbar 4 connected to the bridge arm end c12 of the C-phase lead-out terminal and the outgoing copper busbar 4 connected to the bridge arm end c11 of the A-phase lead-out terminal are connected through the low-voltage lead wire 6 to form a corner connection.

[0049] Specifically, in one embodiment of the present application, the vertical row 2 has wires coming out from the middle, and the connection terminal of the low-voltage coil 1 is connected to the middle wire outlet at the top of the vertical row 2 .

[0050] In this embodiment, the middle outlet of the vertical row 2 is equivalent to the upper and lower parts being connected in parallel and led out from the middle, and the outlet copper bus 4 only needs to be selected according to half of the current, and the specifications of the vertical row only need to meet 0.5 times the I-phase current.

[0051] Specifically, in one embodiment of the present application, the terminal piece 3 is of a forked design; the unforked end of the terminal piece 3 is connected to the lower end of the vertical row 2; the forked end of the terminal piece 3 is connected to the upper end of the outgoing copper bus 4, and the outgoing copper bus 4 is connected to the forked opening of the terminal piece 3.

[0052] Compared with the existing corner connection structure, this type of connection piece 3 structure requires two connection pieces 3 for each connection, and the selection specifications of the connection pieces 3 are reduced, thereby reducing the eddy current loss at the end of the transformer and reducing the space of the transformer.

[0053] Specifically, in one embodiment of the present application, a transformer low-voltage corner-connected outgoing wire structure further includes an outgoing wire fixture 5; the outgoing wire fixture 5 is connected to the transformer body; the outgoing wire fixture 5 is provided with a fixing frame adapted to each of the outgoing wire copper bars 4, and each of the outgoing wire copper bars 4 passes through the fixing frame. The fixing frame of the outgoing wire fixture 5 can stabilize the outgoing wire copper bars 4 to ensure the stability of the corner-connected structure.

[0054] In this embodiment, the outgoing wire fixing member 5 is made of low magnetic material, such as low magnetic steel, which is a kind of steel that is not induced by ferromagnetism. Low magnetic steel usually refers to steel with austenite structure and magnetic permeability lower than 1.5. It has the characteristics of stable structure, excellent mechanical properties, low magnetic permeability and high resistivity. The eddy current loss in the magnetic field is very small, so the use of low magnetic material to make the outgoing wire fixing member 5 can reduce the eddy current loss.

[0055] An embodiment of the present application also provides a transformer, comprising the aforementioned low-voltage angle-connected wire structure of a transformer.

[0056] The beneficial effects of the transformer in this embodiment are the same as those in an embodiment of a low-voltage angle-connected outlet structure of a transformer, and will not be repeated here.

[0057] In summary, the foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various choices and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A low-voltage angle-connected outgoing line structure of a transformer, wherein the connection mode of the low-voltage coil is angle connection, the low-voltage coil is connected in anti-parallel in the same phase, and the two bridge arm ends of the same phase of each branch of two parallel branches with opposite currents in each phase are respectively arranged at the lead-out ends of different phases; characterized in that: Each terminal of each phase of the low-voltage coil is connected to a vertical row; the other end of the vertical row is connected to the upper end of the wiring piece; the lower end of the wiring piece is connected to the upper end of the outgoing copper bar; the outgoing copper bars are connected by low-voltage leads to form a corner connection.

2. The low-voltage angle lead-out structure of a transformer according to claim 1, characterized in that: The outlet copper bars are connected by low-voltage leads to form a corner connection, which includes: The outgoing copper bar connected to the A-phase lead-out terminal and the outgoing copper bar connected to the B-phase lead-out terminal are connected through the low-voltage lead to form a corner connection; The outgoing copper bar connected to the B-phase lead-out terminal and the outgoing copper bar connected to the C-phase lead-out terminal are connected via the low-voltage lead to form a corner connection; The outgoing copper busbar connected to the C-phase lead-out terminal and the outgoing copper busbar connected to the A-phase lead-out terminal are connected through the low-voltage lead to form a corner connection.

3. The low-voltage angle outlet structure of a transformer according to claim 1, characterized in that: The vertical row has wires coming out from the middle, and the connection terminal of the low-voltage coil is connected to the middle wire outlet at the top of the vertical row.

4. The low-voltage angle lead-out structure of a transformer according to claim 1, characterized in that: The wiring piece is of a forked design; the unforked end of the wiring piece is connected to the lower end of the vertical row; the forked end of the wiring piece is connected to the upper end of the outgoing copper bus, and the outgoing copper bus is connected to the forked opening of the wiring piece.

5. The low-voltage angle outlet structure of a transformer according to claim 1, characterized in that: It also includes an outgoing line fixing piece; the outgoing line fixing piece is connected to the transformer body; the outgoing line fixing piece is provided with a fixing frame adapted to each of the outgoing line copper bars, and each of the outgoing line copper bars passes through the fixing frame.

6. A transformer, characterized in that: A low-voltage angle lead-out structure for a transformer comprising the structure described in any one of claims 1 to 5.

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