TWI260653B - Method for connecting low-voltage side inside large current transformer - Google Patents

Abstract

The present invention relates to a method for connecting low-voltage side inside large current transformer, which includes the following steps of: (A) providing an enclosure and low-voltage winding sets, in which the enclosure at least has three sets of low-voltage copper sleeves, and the low-voltage winding set contains three respective windings, each low-voltage winding set having a right lead-out section and a left lead-out section; (B) connecting with the right lead-out section of the low-voltage winding set and the left lead-out section of its corresponding low-voltage winding set to form three joints; and (C) connecting three joints with three corresponding copper sleeves. Accordingly, the present invention can simplify a successive structure to attain reduced materials, shorter assembly hours, less damage generated by high current, so as to thereby enhance assembly efficiency.

Description

1260653 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a transformer connection method, and more particularly to an internal low-voltage side connection method suitable for a high-current transformer. 5 [Prior Art] In the conventional three-phase circuit, it can be divided into a Δ connection method and a γ connection method. Please refer to Figure 1, Figure 1 is the conventional low-voltage side connection method / diagram of three-phase high-current transformer! Luzhong, the transformer 9 group is equipped with three low-voltage windings 70, 80, 90, each winding respectively includes 10 xiao two lead-out terminals 7G2, 7G4, 继, 纲, 9g2, 9g4, each lead terminal is extracted by △ connection method Connected to three external splice plates 72, 82, 92. The phase voltage of the above-mentioned Δ connection method is equal to the line voltage, but its line current is /3 times its phase current. In general, most furnace transformers consume large currents. Therefore, most of the wirings used for furnaces are connected by △ to increase the output current of 15 values. When the low-voltage side of the conventional furnace transformer is connected to the steel-making furnace, in order to reduce the drifting loss of the _ Converse, the high-connected copper plate is often interleaved into the △ connection method outside the transformer, and the high-connected copper plate is more complicated and externally connected. Due to poor heat dissipation, it is necessary to consume more copper material, and it is also required to occupy more than 20 air spaces, so that the weight is increased. Because of this, in the spirit of active invention, the internal low-dust of a large current transformer that can solve the above problems has been studied and completed to complete the method of the present invention. 5 1260653 [Invention The invention relates to a method for connecting an internal low-voltage side of a high-current transformer, which comprises the following steps:

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(A) providing an outer casing and a low-voltage winding group, wherein the low-voltage winding group is disposed inside the outer casing, wherein the outer casing is provided with a first copper sleeve, a second copper sleeve, and a first a three-copper plate sleeve, the low-voltage winding group includes a first low-voltage winding and a second low-voltage winding, and a third low-voltage winding, the two ends of the first low-voltage winding respectively form a first left lead portion and a first right lead portion, The two ends of the second low voltage winding respectively form a second left lead portion and a second right lead out #, and the two ends of the third low voltage winding respectively form a third left lead portion and a third right lead portion. (B) connecting the first left lead portion of the low voltage winding and the second right lead portion of the second low voltage winding to form a first joint portion; a second left lead portion connecting the second low voltage winding, and a third low pressure portion And a third right lead portion of the winding to form a second joint portion; a third left lead portion of the third low voltage winding and a first right lead portion of the first low voltage winding to form a third joint portion. (C) connecting the first joint portion and the first copper plate sleeve; connecting the second joint portion and the second copper plate sleeve; connecting the third joint portion, and the third copper sleeve 20 to the tube 0, whereby the present invention can provide The internal low-voltage side connection method of the transformer can simplify the external connection structure of the transformer, so as to save materials, shorten assembly man-hours, reduce losses caused by high current, and thereby improve transformer assembly efficiency. 6 ΐ 2δ 〇 653 Further, the above step (A) further provides a plurality of terminals, and each of the low voltage windings is respectively provided with at least two terminals. The step (A) further includes a step (A1). · connecting the two ends of the at least two terminals to one end of the first low five-voltage winding and the first right lead-out portion; connecting the two ends of the at least two terminals to the first The other end of a low voltage winding and a first left lead. Wherein, the step (A) further comprises a step (A2), wherein the two ends of the at least two terminals are connected to one end of the first low voltage winding and the second right lead portion; the connection is at least ~^ and the sub-ends respectively The other end of the second low voltage winding and the second left lead 1 are extracted. The step (A) further includes a step (Α3): connecting the two ends of the at least two terminals to one end of the third low voltage winding and the third right lead portion respectively; connecting the two ends of the at least two terminals to the third low voltage winding respectively The other is the third and the left left lead. Thereby, the current of the lead portion can be dispersed to avoid an excessive current, which causes an increase in eddy current loss, resulting in unnecessary power consumption. Further, the above-mentioned (Al), (A2), (A3), (b), and the fixing methods in the steps of 15 and (C) include bolting and welding. In addition, the low-voltage copper plate casing side of the outer casing is a non-magnetic steel outer casing or other non-magnetic material outer casing. Thereby, a large current is prevented from flowing through the splicing copper plate, and the magnetic flux is cut to the outer casing to cause an increase in eddy current loss and a high temperature of the outer casing. [Embodiment] The present invention relates to a method for connecting an internal low-voltage side of a transformer. First, referring to FIG. 2, a schematic diagram of a system according to a preferred embodiment of the present invention, and 7 1260653 - FIG. 3 is a preferred embodiment of the present invention. Flow chart. The present invention includes the following steps: First, an outer casing 1 and a low voltage winding group 4 are provided (step SA), wherein the low voltage winding group 4 is assembled inside the outer casing 1, wherein the outer casing 15 is provided with a a first copper plate sleeve 11, a second copper plate sleeve 21, and a third copper plate sleeve 31. The low voltage winding group 4 includes a first low voltage winding 1A, a second low voltage winding 20, and a third low voltage winding. 3〇, the two ends of the first low-voltage winding 10 respectively form a first right lead-out portion 13 and a first left lead-out portion 15, and the two ends of the second low-voltage winding group 2〇 respectively form a second right lead-out portion 10 23 And a second left lead portion 25, the two ends of the third low voltage winding group 3 are respectively formed with a second right lead portion 33 and a third left lead portion 35. In the present embodiment, the lead-out side of the low-voltage copper plate sleeve of the outer casing 1 is a non-magnetic steel outer casing. Thereby, it is possible to avoid an increase in eddy current loss and a high temperature of the outer casing due to a large current flowing through the continuous copper plate, causing the magnetic flux to cut the outer casing. 15 Next, please refer to FIG. 4, which is a top view of the first low voltage winding of the preferred embodiment of the present invention. Among them, the terminals 1〇1-108, 201_208, 3〇1_3〇8, and the lead-out portions 13, 15, 23, 25, 33, 35 of each of the low-voltage windings 10, 20, 30 are connected. The first low voltage winding 1〇 includes eight terminals 1〇1〇8. The four terminals 101-104 are connected to the first right lead-out portion 13; the four terminals 1〇5_1〇8 20 are connected to the first left lead-out portion 15 (step SA1). 5 is a top view of the system architecture of the second low voltage winding in accordance with a preferred embodiment of the present invention. The second low voltage winding 20 includes eight terminals 201-208. The four terminals 201-204 are connected to the second right lead portion 23; the four terminals 205-208 are connected to the second left lead portion 25 (step S A2). Please refer to FIG. 6 again showing a third low voltage winding 1260653 according to a preferred embodiment of the present invention.

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Top 20 system architecture views. The third low voltage winding 3A includes eight terminals 301-308. The four terminals 301_3〇4 to the third right lead portion 33 are connected; the four terminals 3 05-3 08 to the third left lead portion 35 are connected (step SA3). The above connection methods include bolting and welding. In the present embodiment, the first number of the component symbols is representative of the low voltage winding, and 2 of the second right lead portion 23 represents the second low voltage winding 20, and 3 of the third joint portion 37 represents the third low voltage winding 30. This distinguishes the low voltage windings from confusion. Next, the first right lead portion 13 of the first low voltage winding 10 and the second left lead portion 25 of the second low voltage winding 20 are connected to form a first joint portion 17; and the second low voltage winding 2 is connected to the second The right lead portion and the third left lead portion 35 of the third low voltage winding 30 are formed to form a second joint portion w; and the third right lead portion 33 of the third low voltage winding 3G and the third low voltage winding 1〇 are connected. The first left lead portion 15 is formed to form a third joint portion 37. The connection method described above includes bolting and welding. (Step sb) ... Further, the first joint portion 17 and the -th copper plate sleeve 11 are connected; the joint portion, the joint portion 27, and the second copper plate sleeve 21; the i-th joint portion" and the third copper plate sleeve are connected The tube 31. The above connection method includes screw inspection and welding. (Step SC) Finally, the first copper plate sleeve 11 is connected to the first external copper plate 19, and the second copper plate sleeve 21 is connected to the second outer portion. The copper plate 29 is connected to the third copper plate sleeve to the third external copper plate 39 (step SD). In the present invention, the external copper plates 19, 29, 39 are the input ends of the general steelmaking furnace. The invention can provide a method for connecting the internal low-voltage side of the transformer, which can simplify the external connection structure of the transformer, so as to save material, 9 1260653, It to increase the pressure change crying

The scope of the claims is subject to the scope of the patent application, and is not limited to the above embodiments. Short assembly time, reduce losses caused by high current, and assembly efficiency. [Simple description of the diagram] Figure Η is a conventional method for connecting the external low-voltage side of a three-phase transformer. 2 is a schematic diagram of a system in accordance with a preferred embodiment of the present invention. 10 is a flow chart of a preferred embodiment of the present invention. 4 is a top view of the system architecture of a first low voltage winding in accordance with a preferred embodiment of the present invention. Figure 5 is a top view of the system architecture of a second low voltage winding in accordance with a preferred embodiment of the present invention. Figure 6 is a top view of the system architecture of a third low voltage winding in accordance with a preferred embodiment of the present invention. [Main component symbol description] Outer casing 1 Transformer 9 First copper plate bushing ii First left lead portion 15 First external splice steel plate 19 Low voltage winding group 4 First low voltage winding 10 First right lead portion 13 First joint portion 17 The second low voltage winding 20 10 the second right lead portion 23 the second joint portion 27 the third low voltage winding 30 the third right lead portion 33 the third joint portion 37 the external joint copper plate 7 2 , the external copper plate 92

1260653 Brother one copper plate sleeve 2i Second left bow output portion 25 First external connection copper plate 29 Third copper plate sleeve 3 1 Third left lead portion 35 Third external connection copper plate 39 External connection copper plate 82 Terminals 101, 102, 103 , 104, 105, 106, 107, 108 Terminals 201, 202, 203, 204, 205, 206, 207, 208 Terminals 301, 302, 303, 304, 305, 306, 307, 3 08 Terminals 702, 704, 802, 804, 902, 904

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Claims (1)

1260653 X. Patent Application Range································································· Inside the outer casing, the outer casing is provided with at least one second copper bushing r, at least one second copper bushing, and at least one third copper bushing, the low voltage winding group includes a _first-low voltage winding, a second low voltage group, a =2, and a second low voltage winding, wherein the first and second low voltage windings respectively form a first right lead portion, and _. 1 and a left left lead portion, and the two ends of the second low voltage winding Forming a second right lead-out portion, and a second left lead-out portion 2, respectively, forming a third right lead-out portion and a third left lead portion at both ends of the third low-voltage winding; 15 20 (B) connecting the first The first right lead portion of a low voltage winding and the second left lead portion of the first low voltage winding to form a first joint portion; the connection 3 Haidi's pressure 纟 Qin 日 夕 士 哲 哲 哲And 5 haidi two right lead, and the third low voltage winding, the third left lead胄' to form a second joint; connecting the third low [and A second right lead, and the first left lead of the first low voltage winding to form a third joint; and (C Connecting the first joint portion and the first copper plate sleeve; connecting the first joint portion and the second copper plate sleeve; and connecting the third joint portion and the third copper plate sleeve. 2. For example, in the high-current transformer described in the first paragraph of the patent scope (four) pressure side connection method, wherein the step (A) further provides a plurality of terminals, and each of the low-voltage winding ends are respectively set at least Two terminals. 12 1260653 π low ^ side = the inner connection method of the high current transformer described in the second aspect of the patent scope, wherein the step (A) further comprises a step (Μ): f two terminals of the two terminals respectively to the first - the end of the low voltage winding, the outlet - 'connects the two ends of the at least two terminals to the lower (four) and the other end, and the first left extension. $ ^ Patent No. 2, the high-voltage transformer unit low-voltage side connection side, and the method of joining, wherein the step (A) further comprises a step (A2): connecting the at least two ends of the morning and the evening - the knives are not to one end of the second low voltage winding, 10 15 20 "different-right extracting portion; connecting the at least two terminals of the low pressure around the turtle Xi Xi brother w knives 扪 Wangbian Ang, the other end, and The second left lead portion. 5· * The high current transformer-low-voltage side connection method described in claim 2, wherein the connecting at least -..., () further comprises a step (A3) eve - 鳊子二The ends are respectively connected to the third low and the third right lead Qiu. $ ^ leads 4, connects the other end of the two or three low voltage windings of the at least two terminals, and the third left lead portion. Haidi claims the patent scope 2 The method of claim 2, wherein the at least two terminals comprise four terminals. The portion is low (four) two: the method includes: the screw is tight, and the welding is performed. 4 is connected to the method 8 The electric power _ 傲@ σσ part of the low-voltage side connection method described in item 4, 苴 by # , In the case of large-scale, the pressure is included in the bolting and welding. 4 connection method 13 1260653 The low-voltage side connection method according to item 5 of the patent application scope, wherein the flow transformer includes a bolt tightness, And the welding method. The connection method part of the 乂^ includes the screw inspection tightness = (8) The connection method in the step of the package U· The towel, the high current variable pressure crying meat part low pressure described in the first item of the patent range逯 逯 逯 4 朴 朴 4 4 4 4 i i 右 右 右 右 右 右 右 右 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该The method for connecting the inner low pressure side of the high current transformer according to the item 1, wherein the low pressure copper sleeve side of the outer casing is a non-magnetic steel outer casing.