CN111834098A - Low-voltage y-connection lead structure of triangular three-dimensional dry-type transformer - Google Patents

Low-voltage y-connection lead structure of triangular three-dimensional dry-type transformer Download PDF

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Publication number
CN111834098A
CN111834098A CN202010874992.6A CN202010874992A CN111834098A CN 111834098 A CN111834098 A CN 111834098A CN 202010874992 A CN202010874992 A CN 202010874992A CN 111834098 A CN111834098 A CN 111834098A
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China
Prior art keywords
low
voltage coil
lead
voltage
lead wire
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CN202010874992.6A
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Chinese (zh)
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吴泉
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Jiangxi Yingchuang Electric Co ltd
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Jiangxi Yingchuang Electric Co ltd
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Priority to CN202010874992.6A priority Critical patent/CN111834098A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

The invention discloses a low-voltage y-connection lead structure of a triangular three-dimensional dry-type transformer, wherein a0 wiring terminal is formed at the upper end of a head end lead a of a three-phase low-voltage coil of the transformer, L-a, L-b, L-c, L-a low-voltage coil, a c0 wiring terminal is formed at the upper end of a head end lead c of the L-c low-voltage coil, and a head end lead b of the L-b low-voltage coil is connected to a b0 wiring terminal through a lead; and a tail end lead wire x of the L-a low-voltage coil, a tail end lead wire Y of the L-b low-voltage coil and a tail end lead wire z of the L-c low-voltage coil are respectively connected into a Y through lead wires, the node is a neutral point n, and the neutral point n is connected with an O wiring terminal through an output lead wire. The invention has simple structure, and because the head end and the tail end of the L-b low-voltage coil are positioned in the middle of the iron core, the length of a lead wire which is led to the front side of the transformer by the b-phase low-voltage coil is reduced, the cost of a copper bar is saved, and the invention is suitable for a triangular three-dimensional transformer, in particular to a low-voltage lead structure of a triangular three-dimensional dry-type transformer.

Description

Low-voltage y-connection lead structure of triangular three-dimensional dry-type transformer
Technical Field
The invention relates to a power transformer, in particular to a low-voltage y-connection lead structure of a triangular three-dimensional dry-type transformer.
Background
Because the triangular three-dimensional dry-type transformer adopts a special structure in a shape like the Chinese character 'pin', the three-phase low-voltage coil cannot be led out on the same side, the lead layout is different from that of the traditional transformer, namely, the b-phase low-voltage terminal and the a-phase and c-phase low-voltage terminals are not on the same side of the transformer, and the transformer low-voltage terminal and the low-voltage switch cabinet generally require the transformer low-voltage terminal to be on the same side, so that the traditional low-voltage y-connection lead structure is not suitable for the triangular three-dimensional transformer, in particular to. The invention patent 'a three-dimensional roll iron core transformer low-voltage lead structure (application number: 201310453867.8)' disclosed at present has long lead distance of a b-phase low-voltage coil, the head end and the tail end of the b-phase low-voltage coil need to be staggered, and the lead connecting structure is complex, so that the appearance of a product is not attractive, the processing difficulty of the lead is large, and the assembly is complex; the low-voltage side of the transformer is generally processed by copper bars, and the length of a lead wire leading from a b-phase low-voltage coil of the triangular three-dimensional dry-type transformer to a low-voltage wiring end of the transformer also relates to the overall cost of the transformer.
Disclosure of Invention
The invention aims to provide a low-voltage y-connection lead structure of a triangular three-dimensional dry-type transformer, which has the advantages of completely separated high-voltage and low-voltage side wiring areas, three-phase low-voltage coils which are led out from the same side, convenience in wiring for users, safety, practicability, simple structure, balanced three-phase direct-current resistance and reduced cost.
The purpose of the invention is realized as follows:
a low-voltage y-connection lead structure of a triangular three-dimensional dry-type transformer is characterized in that three-phase low-voltage coils of the transformer are respectively L-a, L-b and L-c:
the head end lead wire b and the tail end lead wire y of the L-b low-voltage coil are arranged in a central triangular area formed by three iron yokes on the triangular three-dimensional iron core; a head end lead wire a and a tail end lead wire x of the L-a low-voltage coil, and a head end lead wire c and a tail end lead wire z of the L-c low-voltage coil are arranged on the front side of the transformer;
the method specifically comprises the following steps: the upper end of the head end lead wire a of the L-a low-voltage coil forms an a0 wiring terminal, the upper end of the head end lead wire c of the L-c low-voltage coil forms a c0 wiring terminal, and the head end lead wire b of the L-b low-voltage coil is connected to a b0 wiring terminal through a lead wire; the tail end lead wire x of the L-a low-voltage coil, the tail end lead wire Y of the L-b low-voltage coil and the tail end lead wire z of the L-c low-voltage coil are respectively connected to the common connecting row through lead wires to form a Y shape, the node is a neutral point n, and the neutral point n is connected with the O wiring terminal through an output lead wire.
The common connecting row is positioned at the upper part of the iron yoke, the lead length of the wiring terminals from the head end lead b to the b0 of the L-b low-voltage coil is more than twice longer than the lead length of the wiring terminals from the head end lead a to the a0 of the L-a low-voltage coil and the lead length of the wiring terminals from the head end lead c to the c0 of the L-c low-voltage coil, and the total length of the leads of the L-a, the L-b and the L-c low-voltage coils is basically equal by increasing the distance from the tail end of the L-a low-voltage coil and the tail end of the L-c low-voltage coil to a neutral point n, so that the three.
And the winding direction of the L-b low-voltage coil is opposite to that of the L-a low-voltage coil and that of the L-c phase low-voltage coil.
The y output lead of the tail end lead y of the L-b low-voltage coil is parallel to the iron yoke on the front side, extends upwards to the upper part of the iron yoke and is bent by 90 degrees towards the front side to be vertical to the iron yoke; connecting the output lead with the common connecting row at the intersection of the common connecting row; and after the y output lead is continuously extended to the same vertical position of the tail end lead x and the tail end lead z, the y output lead is bent downwards by 90 degrees and is connected to the O connecting terminal through the y output lead.
A head end lead wire b of the L-b low-voltage coil is parallel to the iron yoke on the front side, and an output lead wire b of the head end lead wire b of the L-b low-voltage coil is connected with the head end lead wire b, extends to the upper part of the iron yoke and is bent towards the front side direction by 90 degrees to be vertical to the iron yoke; bent 90 deg. to the low voltage terminal b0 at the same level as the a0 terminal.
And an x output lead of a tail end lead x of the L-a low-voltage coil extends to the upper part of the iron yoke and is bent by 90 degrees to be connected with the shared connecting row.
And a z output lead of a tail end lead z of the L-c low-voltage coil extends to the upper part of the iron yoke and is bent by 90 degrees to be connected with the shared connecting row.
The invention is suitable for the open type triangular three-dimensional iron core, and after the low-voltage coil is sleeved, the low-voltage coil can be randomly changed in position on the corresponding iron core column; the closed triangular three-dimensional iron core cannot realize the functions.
The main innovation of the invention is that:
(1) an open type triangular three-dimensional iron core is adopted, a leading wire b at the head end and a leading wire y at the tail end of an L-b low-voltage coil are arranged in a central triangular area formed by three iron yokes at the upper part of the triangular three-dimensional iron core, the distance from the leading wire b to a wiring terminal at the front side of the transformer is the nearest, and a large number of copper bars can be saved;
(2) the common connecting row is positioned on the upper part of the iron yoke, the lead length of the wiring terminals from the head end lead b to the b0 of the L-b low-voltage coil is more than twice longer than the lead length of the wiring terminals from the head end lead a to the a0 of the L-a low-voltage coil and the head end lead c to the c0 of the L-c low-voltage coil, and the total length of the leads of the L-a, the L-b and the L-c three-phase coils is basically equal by increasing the distance from the tail ends of the L-a low-voltage coil and the L-c low-voltage coil to a neutral point n, so that the three-phase direct current resistance.
The connection among the copper bars comprises various welding, standard part connection and riveting.
The invention has simple structure, and because the head end and the tail end of the L-b low-voltage coil are positioned in the middle of the iron core, the length of a lead wire which is led to the front side of the transformer by the b-phase low-voltage coil is reduced, the cost of a copper bar is saved, and the invention is suitable for a triangular three-dimensional transformer, in particular to a low-voltage lead structure of a triangular three-dimensional dry-type transformer.
Drawings
Fig. 1 is a front view of a low voltage terminal of the present invention;
FIG. 2 is a top exploded view of the present invention (showing a top view of the low voltage coil head end connection);
FIG. 3 is a top view of the low pressure head end, tail end home position of the present invention;
FIG. 4 is a top exploded view of the present invention (showing a top view of the low voltage coil end connection);
FIG. 5 is a front view of the low voltage neutral of the present invention;
number table in the figure: the circuit comprises a 1-z output lead, a 2-y output lead, a 3-x output lead, a 4-shared connecting bar, a 5-c0 wiring terminal, a 6-b0 wiring terminal, a 7-a0 wiring terminal, an 8-b output lead, a 9-O output lead and a 10-O wiring terminal.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings.
A low-voltage y-connection lead structure of a triangular three-dimensional dry-type transformer is characterized in that the three-phase low-voltage coils of the transformer are respectively L-a, L-b, L-c, and the head-end leads of the L-a low-voltage coils are respectively a head-end lead a, a head-end lead b of an L-b voltage coil and a head-end lead c of an L-c low-voltage coil; the tail end lead of the L-a low-voltage coil is a tail end lead x, the tail end lead of the L-b low-voltage coil is a tail end lead y, and the tail end lead of the L-c low-voltage coil is a tail end lead z. See FIG. 1
The upper end part of the head end lead wire a forms a0 wiring terminal 7; a c0 wiring terminal 5 is formed at the upper end of the head end lead wire c; the head end lead b extends to the front through the b output lead 8 and then bends downward by 90 degrees, so that the horizontal direction and the vertical direction of the b output lead 8 are at the same positions as the a0 wiring terminal 7 and the c0 wiring terminal 5, and the end positions form an output b0 wiring terminal 6, which is shown in fig. 2-3.
The end lead x is connected to the common coupling bank 4 through the x output lead 3, and the end lead z is connected to the common coupling bank 4 through the z output lead 1; the end lead y is connected to the common connection bank 4 through the y output lead 2, the y output lead 2 continues to extend forward and then bends downward by 90 ° so that the horizontal and vertical directions of the y output lead 2 are at the same level as the end lead x and the end lead z, and then leads to the O terminal 10 through the O output lead 9, see fig. 3 to 5.

Claims (7)

1. A low-voltage y-connection lead structure of a triangular three-dimensional dry-type transformer is characterized in that three-phase low-voltage coils of the transformer are respectively L-a, L-b and L-c:
the head end lead wire b and the tail end lead wire y of the L-b low-voltage coil are arranged in a central triangular area formed by three iron yokes on the triangular three-dimensional iron core; a head end lead wire a and a tail end lead wire x of the L-a low-voltage coil, and a head end lead wire c and a tail end lead wire z of the L-c low-voltage coil are arranged on the front side of the transformer;
the method specifically comprises the following steps: the upper end of the head end lead wire a of the L-a low-voltage coil forms an a0 wiring terminal, the upper end of the head end lead wire c of the L-c low-voltage coil forms a c0 wiring terminal, and the head end lead wire b of the L-b low-voltage coil is connected to a b0 wiring terminal through a lead wire; the tail end lead wire x of the L-a low-voltage coil, the tail end lead wire Y of the L-b low-voltage coil and the tail end lead wire z of the L-c low-voltage coil are respectively connected to the common connecting row through lead wires to form a Y shape, the node is a neutral point n, and the neutral point n is connected with the O wiring terminal through an output lead wire.
2. The low-voltage y-connection lead structure of the triangular solid dry-type transformer according to claim 1, wherein: the common connecting row is positioned at the upper part of the iron yoke, the lead length of the wiring terminals from the head end lead b to the b0 of the L-b low-voltage coil is more than twice longer than the lead length of the wiring terminals from the head end lead a to the a0 of the L-a low-voltage coil and the lead length of the wiring terminals from the head end lead c to the c0 of the L-c low-voltage coil, and the total length of the leads of the L-a, the L-b and the L-c low-voltage coils is basically equal by increasing the distance from the tail end of the L-a low-voltage coil and the tail end of the L-c low-voltage coil to a neutral point n, so that the three.
3. The low-voltage y-connection lead structure of the triangular solid dry-type transformer according to claim 1, wherein: and the winding direction of the L-b low-voltage coil is opposite to that of the L-a low-voltage coil and that of the L-c phase low-voltage coil.
4. The low-voltage y-connection lead structure of the triangular solid dry-type transformer according to claim 1, wherein: the y output lead of the tail end lead y of the L-b low-voltage coil is parallel to the iron yoke on the front side, extends upwards to the upper part of the iron yoke and is bent by 90 degrees towards the front side to be vertical to the iron yoke; connecting the output lead with the common connecting row at the intersection of the common connecting row; and after the y output lead is continuously extended to the same vertical position of the tail end lead x and the tail end lead z, the y output lead is bent downwards by 90 degrees and is connected to the O connecting terminal through the y output lead.
5. The low-voltage y-connection lead structure of the triangular solid dry-type transformer according to claim 1, wherein: a head end lead wire b of the L-b low-voltage coil is parallel to the iron yoke on the front side, and an output lead wire b of the head end lead wire b of the L-b low-voltage coil is connected with the head end lead wire b, extends to the upper part of the iron yoke and is bent towards the front side direction by 90 degrees to be vertical to the iron yoke; bent 90 deg. to the low voltage terminal b0 at the same level as the a0 terminal.
6. The low-voltage y-connection lead structure of the triangular solid dry-type transformer according to claim 1, wherein: and an x output lead of a tail end lead x of the L-a low-voltage coil extends to the upper part of the iron yoke and is bent by 90 degrees to be connected with the shared connecting row.
7. The low-voltage y-connection lead structure of the triangular solid dry-type transformer according to claim 1, wherein: and a z output lead of a tail end lead z of the L-c low-voltage coil extends to the upper part of the iron yoke and is bent by 90 degrees to be connected with the shared connecting row.
CN202010874992.6A 2020-08-27 2020-08-27 Low-voltage y-connection lead structure of triangular three-dimensional dry-type transformer Pending CN111834098A (en)

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Application Number Priority Date Filing Date Title
CN202010874992.6A CN111834098A (en) 2020-08-27 2020-08-27 Low-voltage y-connection lead structure of triangular three-dimensional dry-type transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010874992.6A CN111834098A (en) 2020-08-27 2020-08-27 Low-voltage y-connection lead structure of triangular three-dimensional dry-type transformer

Publications (1)

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CN111834098A true CN111834098A (en) 2020-10-27

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