CN211742818U - Amorphous distribution transformer - Google Patents

Abstract

The utility model relates to an amorphous distribution transformer, including coil and iron core, the coil includes low voltage coil and high voltage coil, and the iron core is amorphous iron core, and low voltage coil is around in the leg outside unshakable in one's determination, and the high voltage coil is around in the outside of low voltage coil, and the coil centre gripping is in the middle of the folder, and is fixed as an organic whole with the folder, hangs unshakable in one's determination on the coil, low voltage coil and high voltage coil wind to opposite, high voltage coil wind to for the right side, its end is close to the main air way side, and the top is located its last circle and draws forth, is equipped with fretwork nylon cushion between coil and the folder, is equipped with the. The utility model discloses can effectively reduce the breadth that the coil bore to electrodynamic force and axial electrodynamic force, reduce coil copper product consumption, reduce the copper consumption, reduce the transformer temperature rise, the energy saving, the baffle can improve the coil rigidity, avoids warping, adopts fretwork nylon cushion, can effectively guarantee transformer oil's mobility, improves the radiating effect of coil, improves the ability that the transformer bore the short circuit.

Description

Amorphous distribution transformer

Technical Field

The utility model relates to an amorphous distribution transformer belongs to the transformer field.

Background

Along with the development of the society, the requirements on the power supply quality and the reliability of a power distribution network are higher and higher, the performance of a distribution transformer is improved, the power supply reliability can be effectively improved, and the safety of power supply equipment is guaranteed. Conventional distribution transformer technology has tended to be stable, but still suffers from the following drawbacks: 1. the high-voltage coil and the low-voltage coil are wound by adopting copper wires, the copper consumption is high, the material consumption is high, the axial force borne by the coils is large, the temperature of the coils is increased, and a large allowance is required to be reserved during design; 2. the coil is insulated by adopting a paint dipping process, and the used paint dipping is a two-component paint with a volatile diluent, is harmful to human bodies and pollutes the environment; 3. the coil adopts the paint dipping process to reduce the radial force of the high-voltage coil, and the effect is not obvious; 4. an epoxy cylinder is arranged between the low-voltage coil and the core column of the iron core, the voltage-sharing effect is not obvious, and the low-voltage coil is easy to collapse inwards due to radial electrodynamic force; 5. cushion blocks between the coil and the clamping piece and the high-voltage lead wire clamp and the low-voltage lead wire clamp are made of high-density laminated wood materials, so that the usage amount of wood is large, and social environment is influenced; 6. the assembly of the clamping pieces is complicated, and the production efficiency is influenced; 7. the weight of the coil is carried on the core, causing core stress and deformation, affecting electromagnetic performance and core life.

SUMMERY OF THE UTILITY MODEL

For overcoming the above defect of prior art, the utility model provides an amorphous distribution transformer can effectively reduce the copper product consumption, improves the coil heat-sinking capability, reduces coil radial force, saves timber, improves the ability that the transformer bore the short circuit.

The utility model discloses realize above-mentioned purpose's technical scheme is: amorphous distribution transformer, including coil and iron core, the coil includes low voltage coil and high voltage coil, the iron core is amorphous iron core, low voltage coil surround in the core leg outside unshakable in one's determination, high voltage coil surround in the outside of low voltage coil, the coil is located in the middle of the folder, with the folder is fixed as an organic whole, the iron core hangs on the coil, can adopt the folder to live with the coil centre gripping usually, can set up and realize this kind of centre gripping and fixed with auxiliary members such as the supporting cushion of folder, the structure unshakable in one's determination reaches the structure of coil can be according to prior art, is the rectangle iron core and overlaps the rectangle coil on the core leg unshakable in one's determination usually for the rectangle iron. In the case of three-phase alternating current, a respective coil of each phase and a respective core structure can be provided, the high-voltage coil of each phase surrounding the outer side of the low-voltage coil of the respective phase.

Preferably, the clamping piece comprises an upper clamping piece and a lower clamping piece, the main body part of the upper clamping piece is in a horizontal plate shape, the lower clamping piece is a U-shaped clamping piece and comprises a horizontal bottom plate and a left side plate and a right side plate which respectively extend upwards from the left side and the right side of the bottom plate, a cushion block is arranged between the upper clamping piece and the coil and supports a space for accommodating the upper end of the iron core, a cushion block is arranged between the bottom plate of the lower clamping piece and the coil and supports a space for accommodating the lower end of the iron core, the bottom plates of the upper clamping piece and the lower clamping piece are fastened together through a plurality of pull rods on the front side and the rear side, the upper clamping piece compresses the top end (at least part of the end surface) of the iron core through the corresponding cushion block, the bottom plate of the lower clamping piece compresses the bottom end (at least part of the end surface), and steel plates are arranged on the inner sides of the left side plate and the right side plate.

Preferably, a partition board is arranged in the middle of the iron core and divides the iron core into a front iron core part and a rear iron core part, the partition plate is provided with a hollow space for allowing the coil to pass through and clamping the coil, and supports and fixes the middle portion of the coil, and the partition plate and the clamping member are fixed together, for example, the top of the partition board and the upper clamping piece can be fastened together in a bolt connection mode, the bottom of the partition board and the bottom plate of the lower clamping piece can be fastened together, or the partition board is clamped by the bottom plates of the upper clamping piece and the lower clamping piece, the bottom plates of the upper clamping piece and the lower clamping piece are respectively provided with a slot for inserting (or embedding) the top and the bottom of the partition board, the slots may be directly formed on the bottom plates of the upper and lower clips, or may be individually formed with a channel member screwed to the bottom plates of the upper and lower clips.

Preferably, the partition plate is formed by butting two comb plates, the butting sides of the two comb plates are provided with comb teeth in corresponding positions, and after the two comb plates are butted, the space between the adjacent comb teeth forms a hollow space for allowing the coil to pass through and clamping the coil.

Preferably, the block body of the cushion block is of a hollow structure penetrating through the cushion block from top to bottom, a positioning column protruding vertically is arranged on the upper surface or the lower surface of the cushion block, and a positioning hole suitable for the positioning column to be inserted and fixed is formed in the clamping piece.

Preferably, the winding direction of the low-voltage coil is opposite to that of the high-voltage coil, the winding direction of the high-voltage coil is the right winding direction, the tail end of the high-voltage coil is close to the main air channel side, and the starting end of the high-voltage coil is located at the last turn of the high-voltage coil and led out.

Preferably, the low-voltage coil and the high-voltage coil are both rectangular coils, the length ratio of the long axis of the rectangular coil to the short axis of the rectangular coil is 1.2:1-1.8:1, the low-voltage coil is formed by winding copper foils, the width of the copper foils is larger than the reactance height of the high-voltage coil, all the layers of the low-voltage coil are separated by diamond-lattice glue-dispensing paper, and all the layers of the high-voltage coil are separated by the diamond-lattice glue-dispensing paper.

Preferably, the low-voltage coil and the core post of the iron core are separated by an insulating paper board, a first FR-4 epoxy board is arranged between the long coil axis of the low-voltage coil and the core post of the iron core, and a stainless steel plate is arranged on the inner side of the short coil axis of the penultimate turn of the low-voltage coil.

Preferably, a second FR-4 epoxy board is arranged between the long edges of each layer of the high-voltage coil.

Preferably, A, B phase coils are tightly bound, B, C phase coils are tightly bound, the phases of the coils are supported and supported by epoxy resin plates, and a third FR-4 epoxy plate is arranged between the outer side of the A, C phase coils and the iron core.

The utility model has the advantages that:

1. the utility model discloses an unshakable in one's determination hangs on the coil, and unshakable in one's determination does not receive other external forces except self gravity, makes unshakable in one's determination not produce stress and deformation, can not influence its electromagnetic property and life because of stress and deformation.

2. The utility model discloses a high-voltage coil adopts the right side to wind to and the coil is beginning, terminal position setting, has changed traditional coil coiling mode and has reduced high-voltage coil's the mode of radial force through means such as dip coating, through the structure itself of adjustment high-voltage coil, changes its radial force distribution to effectively reduced the radial force that high-voltage coil bore.

3. The utility model discloses a length ratio setting of rectangular coil and coil major axis and coil minor axis can effectively reduce the amplitude force that coil major axis part bore.

4. The utility model discloses a low pressure coil adopts the width of copper foil coiling and copper foil to be greater than high-pressure coil's reactance height, both can reduce the copper product consumption, reduce the copper consumption, reduce the transformer temperature rise, and energy saving can also reduce the axial electrodynamic force that the coil received, change the atress distribution of the holistic axial electrodynamic force of coil, make low pressure coil's axial electrodynamic force outwards stretch, high-pressure coil's axial electrodynamic force is inside to be compressed, thereby improve the axial electrodynamic force bearing capacity of coil, improve the wholeness ability of coil.

5. The utility model discloses a coil need not carry out dip coating insulation treatment, does not use and has volatility and to the harmful chemical lacquer of human body and environment, can effectively guarantee staff's safety and environmental protection.

6. The utility model discloses a setting of first FR-4 epoxy board, corrosion resistant plate and second FR-4 epoxy board can effectively play the effect of voltage-sharing, improves the ability that the transformer bore the short circuit.

7. The utility model discloses a setting of baffle unshakable in one's determination can press from both sides tightly and tie up the coil, makes the coil form a rigid whole, avoids the coil to warp.

8. The utility model discloses a fill up dress hollow out construction's nylon cushion between coil and folder compares in traditional adoption laminated wood and does the cushion, can effectively guarantee transformer oil's mobility, improves the radiating effect of coil, improves the transformer and bears the ability of short circuit, still can save timber.

9. The utility model discloses an go up folder and folder down constitute coil and unshakable in one's determination rigid frame jointly, have good structural strength, assembly between the two is simple convenient, can effectively improve production efficiency, and the structural strength of folder can further be promoted in the setting of the inboard steel sheet of curb plate of folder down, the utility model discloses an improve the bulk strength and the performance of transformer, improved its ability of bearing the short circuit greatly.

Drawings

Fig. 1 is a schematic perspective view of the coil and the front or rear core according to the present invention;

fig. 2 is a schematic top view assembly of the coil and front or rear core of the present invention;

fig. 3 is a schematic perspective view of the comb plate of the present invention;

FIG. 4 is a schematic perspective view of one embodiment of a spacer of the present invention;

FIG. 5 is a schematic perspective view of another embodiment of a spacer of the present invention;

fig. 6 is a schematic perspective view of the lower clip of the present invention;

fig. 7 is a perspective view of the present invention;

fig. 8 is a perspective view of the wire clamping block of the present invention;

fig. 9 is a front view assembly view of the coil and core of the present invention;

fig. 10 is a schematic top view of the coil and core assembly of the present invention.

Detailed Description

The utility model discloses an amorphous distribution transformer, which comprises a coil and an iron core, wherein the coil comprises a low-voltage coil and a high-voltage coil, the iron core is an amorphous iron core and is made of amorphous alloy sheets, the low-voltage coil surrounds the outer side of the core column of the iron core, the high-voltage coil is wound on the outer side of the low-voltage coil, the winding size deviation of the coil is +/-1 mm, the winding direction of the low-voltage coil is opposite to that of the high-voltage coil, the winding direction of the low-voltage coil is a left winding direction, the winding direction of the high-voltage coil is the right winding direction, the tail end of the high-voltage coil is close to the main air channel side, the starting end of the high-voltage coil is positioned at the last turn of the high-voltage coil and led out, by adjusting the structure (winding direction and the position arrangement of the start end and the tail end) of the high-voltage coil, the radial stress distribution of the high-voltage coil is changed, so that the radial force borne by the high-voltage coil is effectively reduced. The iron core is suspended on the coil, and is free from other external forces except the self gravity, so that the iron core does not generate stress and deformation, and the electromagnetic performance and the service life of the iron core are not influenced by the stress and the deformation.

Referring to fig. 1, 2, 3, 9 and 10, the low voltage coil 1 and the high voltage coil 2 are preferably rectangular coils, the length ratio of the long axis of the rectangular coil to the short axis of the rectangular coil is 1.2:1-1.8:1, such as 1.2:1, 1.5:1 or 1.8:1, preferably 1.5:1, and the ratio of the long axis of the rectangular coil to the short axis of the rectangular coil can effectively reduce the radial force borne by the long axis part of the rectangular coil.

The low-voltage coil is preferably formed by winding copper foil, so that the copper consumption can be reduced, the copper consumption is reduced, the temperature rise of the transformer is reduced, and the energy is saved.

The width of the copper foil is preferably larger than the reactance height of the high-voltage coil, and the axial electrodynamic force borne by the coil can be obviously reduced by combining a high-voltage coil and low-voltage coil reverse winding mode, so that the stress distribution of the axial electrodynamic force of the whole coil is changed, the axial electrodynamic force of the low-voltage coil is outwards stretched, and the axial electrodynamic force of the high-voltage coil is inwards compressed, so that the axial electrodynamic force bearing capacity of the coil is improved, and the whole performance of the coil is improved.

Can adopt diamond check point to glue paper between each layer of low voltage coil and separate to realize bonding and insulating, can adopt diamond check point to glue paper between each layer of high voltage coil and separate, in order to play insulating effect, compare in traditional adoption dip coating and carry out insulation processing's mode, do not use and have volatility and to the chemical lacquer harmful to human body and environment, can effectively guarantee staff's safety and environmental protection, because the copper foil laminates with diamond check point well to glue paper, even and not leave the space, can form very high wholeness and insulating properties after the solidification bonds, and can obviously reduce vibration and noise.

The low-voltage coil and the core pillar of the iron core 3 are preferably separated by an insulating paper board (or electrical insulating paper board), the structural shape of the insulating paper board may be the same as that of the inner side surface of the low-voltage coil, the thickness of the insulating paper board is preferably 2mm, a first FR-4 epoxy board 4 is preferably arranged between the coil long axis of the low-voltage coil and the core pillar of the iron core, the structural shape of the first FR-4 epoxy board may be the same as that of the inner side surface of the coil long axis of the low-voltage coil, the thickness of the first FR-4 epoxy board is preferably 3mm, a stainless steel plate is preferably arranged inside the coil short axis of the penultimate turn of the low-voltage coil, and the structural shape of the stainless steel plate may be the same as that of the inner side surface of the coil short axis of the penultimate turn of the low-voltage, the thickness of the stainless steel plate is preferably 1 mm. The second FR-4 epoxy board is preferably arranged between the long sides of each layer of the high-voltage coil, the structural shape of the second FR-4 epoxy board arranged between the long sides of each layer of the high-voltage coil is preferably the same as that of the long-side contact surface of the adjacent layer of the high-voltage coil, and the thickness of the second FR-4 epoxy board is preferably 1 mm. The arrangement of the first FR-4 epoxy plate, the stainless steel plate and the second FR-4 epoxy plate can effectively play a role in voltage sharing, prevent the coil from deforming and improve the short circuit bearing capacity of the transformer.

Generally, A, B phase coils of the amorphous distribution transformer are tightly bound, B, C phase coils of the amorphous distribution transformer are tightly bound, the phases of the coils are supported and supported by epoxy resin plates, so that structural stability is improved, a third FR-4 epoxy plate 5 is preferably arranged between the outer side of a coil long shaft of the A, C phase coil and the iron core, the structural shape of the third FR-4 epoxy plate can be the same as that of the outer side face of the coil long shaft of the A, C phase coil, and the thickness of the third FR-4 epoxy plate is preferably 3 mm.

The partition plate 6 is preferably arranged in the middle of the iron core, divides the iron core into a front iron core 31 and a rear iron core 32, is provided with a hollow hole for allowing the coil to penetrate through and clamping the coil, supports and fixes the middle part of the coil, is fixed with the clamping piece, and can be fixed with the clamping piece through bolt connection with the clamping piece and/or clamping by a limiting structure (for example, a slot suitable for inserting and fixing the edge of the partition plate) on the clamping piece.

The partition plate is preferably formed by butting two comb plates 61 and 62, the butting sides of the two comb plates are respectively provided with comb teeth 7 corresponding to the positions, after the two comb plates are butted, the space between the adjacent comb teeth forms a hollow space for allowing the coil to pass through and clamping the coil, and the space between the adjacent comb teeth at different positions is different, so that the partition plate is suitable for the long axis of the coil of one coil or the two long axes of the two adjacent coils which are attached to each other to pass through and clamp. During assembly, after the front iron core is assembled on the coil, the two comb-shaped plates are respectively connected along the upper surface of the front iron core from the front side and the rear side of the coil to form the partition plate, comb teeth of the comb-shaped plates are correspondingly inserted in the outer side and the winding hole of the coil, and the coil and FR-4 epoxy plates on the inner side and the outer side of the coil are fixedly clamped in the vacant positions among the comb teeth. The coil can be clamped and bound by the partition plate, so that the coil forms a rigid whole, and the coil is prevented from deforming.

Referring to fig. 4, 5, 6 and 7, the clip preferably includes an upper clip 12 and a lower clip 13, a main portion of the upper clip is in a horizontal plate shape, the lower clip is a U-shaped clip and includes a bottom plate 14 and left and right side plates 16 extending upward from the left and right sides of the bottom plate, the upper clip is parallel to the bottom plate of the lower clip, front and rear sides of the upper clip and front and rear sides of the bottom plate of the lower clip are respectively fastened (e.g., bolted) by a plurality of vertical tie bars 15, front and rear sides of the upper clip and front and rear sides of the lower clip are respectively provided with horizontally extending ear plates for connection of the tie bars, a spacer 8 is provided between the upper clip and the coil to support a space for accommodating an upper end of the core, and a spacer is provided between the lower clip and the coil to support a space for accommodating a lower end of the core, the upper clamping piece compresses the top end of the iron core, the bottom plate of the lower clamping piece compresses the bottom end of the iron core, damping rubber pads are arranged between the iron core and the bottom plates of the upper clamping piece and the lower clamping piece respectively, vertical plates 17 which extend to the space between the left side plate and the right side plate and are perpendicular to the side plates are arranged on the front side and the rear side of the left side plate and the rear side of the right side plate of the lower clamping piece respectively, the left side plate, the right side plate and the vertical plates of the lower clamping piece clamp tightly clamp the left side and the right side of the iron core, steel plates 18 are arranged on the inner sides of the left side plate and the right side plate of the lower clamping piece, the thickness of the. Go up the folder with the folder constitutes jointly down the coil with unshakable in one's determination's rigid frame has good structural strength, and the assembly between the two is simple convenient, can effectively improve production efficiency, the utility model discloses an improve the bulk strength and the performance of transformer, improved its ability of bearing the short circuit greatly.

The block body of the cushion block is preferably of a hollow structure penetrating through the cushion block from top to bottom, the cushion block comprises a plurality of parallel cushion block ribbons 9, the length of the plurality of cushion block ribbons is the same, the distance between any two adjacent cushion block ribbons is the same, any two adjacent cushion block ribbons are connected through a group of connecting plates, each group of connecting plates comprises a plurality of parallel connecting plates 10 vertical to the cushion block ribbons, the distance between any two adjacent connecting plates in each group of connecting plates is the same, a plurality of hollow through holes which are regularly distributed and penetrate through the block body from top to bottom are formed on the cushion block through the connecting structures of the plurality of cushion block ribbons and the plurality of groups of connecting plates, the upper surface or the lower surface of the cushion block is provided with vertically convex positioning columns 11, the positioning columns are preferably arranged on the cushion block ribbons positioned in the middle part, and the number of the, the cushion block can adopt different lengths according to different cushion positions, the clamping piece is provided with a positioning hole suitable for the positioning column to be inserted and fixed, and the cushion block is cushioned between the clamping piece and the coil by inserting the positioning column into the matched positioning hole in the clamping piece.

The cushion is preferably a nylon cushion, and the hollow-out structure and the material of the cushion are selected, so that compared with the traditional cushion made of laminated wood, the fluidity of transformer oil can be effectively guaranteed, the heat dissipation effect of a coil is improved, the short circuit bearing capacity of a transformer is improved, and wood can be saved.

The height (the ascending size in vertical direction) of connecting plate is less than the height of cushion slat, its vertical central height preferred with the cushion slat is at vertical central height the same under the support of cushion slat, the top and the below of connecting plate all have the clearance that allows the medium to flow, combine the cushion slat with the mesh structure that the connecting plate formed can obviously improve transformer oil circulation effect, improves the heat-sinking capability, improves the radiating effect, compares with current wooden cushion, has obviously reduced because of setting up the influence of cushion to corresponding regional radiating effect.

Referring to fig. 7 and 8, the low voltage side of the upper clamping piece may be provided with a low voltage lead wire clamp for fixing a low voltage lead wire, the low voltage lead wire clamp preferably includes two wire clamping blocks 19 and a wire clamping plate 20, the wire clamping blocks are step-shaped, the length of a first step 21 of each wire clamping block is greater than that of a second step 22 of each wire clamping block, the first step is provided with a first through hole 23 which penetrates through the block and is long, the second step is provided with a second through hole 24 which penetrates through the block and is circular, the wire clamping blocks are hollowed out except for the first through hole and the second through hole, the two wire clamping blocks are attached to each other in a front-back manner, the first step and the second step of one wire clamping block are respectively attached to the second step and the first step of the other wire clamping block, and a vertical gap is formed between the first step and the second step of the two wire clamping blocks, the wire clamp plate is clamped in the gap, a first through hole and a second through hole in one wire clamp block are communicated with a second through hole and a first through hole in the other wire clamp block respectively to form two wire clamp mounting holes, the low-voltage side of the upper clamp is provided with two clamp mounting holes matched with the wire clamp mounting holes, the low-voltage lead wire clamp can be connected with the low-voltage side of the upper clamp through bolts, the wire clamp mounting holes and the clamp mounting holes serve as connecting holes for bolt connection, the wire clamp plate is provided with a low-voltage lead wire hole 25 penetrating through the plate surface for a low-voltage lead wire to pass through, the part of the wire clamp plate above the wire clamp block can be bent outwards, and the low-voltage lead wire clamp is preferably made of nylon. The unique structural design and the material of the low-voltage lead wire clamp are convenient for self installation and fixation of the low-voltage lead wire, and can save wood (compared with the prior art that laminated wood is used as the material).

The utility model discloses mainly can be used to oil-immersed transformer, its assembly method is: adopt the copper foil coiling low-voltage coil, low-voltage coil adopts left side to wind, adopts diamond lattice point to glue paper between each layer of low-voltage coil and separates, and the length ratio of the coil major axis of low-voltage coil and coil minor axis is 1.5:1, insulating paper board is placed to low-voltage coil's inboard, first FR-4 epoxy board is placed to low-voltage coil's major axis inboard, stainless steel plate is placed to low-voltage coil's the coil minor axis inboard of the second last circle, low-voltage coil coiling is accomplished back at its outside coiling high-voltage coil, high-voltage coil adopts right side winding direction, the end is close to main air way side, the top is located its last circle and draws forth, adopt diamond lattice point to glue paper between each layer of high-voltage coil and separate, high-voltage coil's the length ratio of coil major axis and coil minor axis is 1.5:1, placing a second FR-4 epoxy plate between long edges of each layer of a high-voltage coil, pressing, drying and curing the whole coil, placing an epoxy resin plate for insulation support before each phase of the coil, placing a third FR-4 epoxy plate outside an A, C-phase coil, binding a A, B-phase coil, binding a B, C-phase coil, placing BMB composite insulation point gummed paper on the side of the coil iron, assembling a lower-layer iron core (the direction in installation and assembly, which is one of a front iron core and a rear iron core) on the coil, wrapping the BMB composite insulation point gummed paper, placing an iron core clapboard, assembling an upper-layer iron core (the direction in installation and assembly, which is the other of the front iron core and the rear iron core) on the coil, and finally fixing the coil and the iron core through an upper clamping piece and a lower clamping piece.

Claims (10)

1. The amorphous distribution transformer comprises a coil and an iron core, wherein the coil comprises a low-voltage coil and a high-voltage coil, the iron core is an amorphous iron core, the low-voltage coil surrounds the outer side of a core column of the iron core, and the high-voltage coil surrounds the outer side of the low-voltage coil.

2. An amorphous distribution transformer as defined in claim 1, wherein said clamp member comprises an upper clamp member and a lower clamp member, said upper clamp member having a substantially horizontal plate shape, said lower clamp member having a U-shaped clamp member including a horizontal bottom plate and left and right side plates extending upward from left and right sides of said bottom plate, respectively, said upper clamp member and said coil being provided with spacers therebetween for supporting a space for accommodating an upper end of said core, said lower clamp member having a spacer between a bottom plate thereof and said coil for supporting a space for accommodating a lower end of said core, said upper clamp member and said bottom plate of said lower clamp member being fastened together by a plurality of tie rods at front and rear sides thereof, said upper clamp member pressing a top end of said core by means of said spacers, said bottom plate of said lower clamp member pressing a bottom end of said core by means of said spacers, said left and right side plates pressing left and right sides of said core, respectively, and steel plates are arranged on the inner sides of the left side plate and the right side plate.

3. An amorphous distribution transformer as claimed in claim 2, wherein said core is provided with a partition in the middle thereof, said partition dividing said core into two parts, a front core and a rear core, said partition being provided with a hollow for allowing said coil to pass therethrough and clamping said coil, for supporting and holding a middle portion of said coil, said partition being fixed to said clamp.

4. An amorphous distribution transformer as claimed in claim 3, characterized in that said partition is formed by two comb plates abutting each other, and the abutting sides of said two comb plates are provided with comb teeth at corresponding positions, and after said two comb plates are abutted, the space between adjacent comb teeth forms a hollow space for allowing said coil to pass through and clamping said coil.

5. The amorphous distribution transformer of claim 4, wherein the block of the pad is a hollow structure penetrating from top to bottom, the upper surface or the lower surface of the pad is provided with a vertically protruding positioning column, and the clamping member is provided with a positioning hole for inserting and fixing the positioning column.

6. An amorphous distribution transformer as claimed in claim 1, 2, 3, 4 or 5, characterized in that said low voltage coil has a winding direction opposite to that of said high voltage coil, said high voltage coil has a winding direction of right, said high voltage coil has a terminal end near the main air channel side, and said high voltage coil has a starting end at its last turn and leading out.

7. An amorphous distribution transformer as claimed in claim 6, wherein said low voltage coil and said high voltage coil are both rectangular coils, the ratio of the length of the long axis of the rectangular coil to the short axis of the rectangular coil is 1.2:1-1.8:1, said low voltage coil is wound with copper foil, the width of said copper foil is greater than the reactance height of said high voltage coil, each layer of said low voltage coil is separated by diamond-point glue paper, each layer of said high voltage coil is separated by diamond-point glue paper.

8. The amorphous distribution transformer of claim 7 wherein said low voltage coil is separated from said leg of said core by an insulating paper sheet, a first FR-4 epoxy sheet is disposed between said long axis of said low voltage coil and said leg of said core, and a stainless steel sheet is disposed inside said short axis of said penultimate turn of said low voltage coil.

9. An amorphous distribution transformer as claimed in claim 8, characterised in that a second FR-4 epoxy board is provided between the long sides of the layers of said high voltage coil.

10. An amorphous distribution transformer as claimed in claim 9, characterized in that A, B phase coils are fastened, B, C phase coils are fastened, the phases of said coils are supported and tightened by epoxy resin plates, and a third FR-4 epoxy plate is provided between the outside of A, C phase coil and said core.

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