CN218241555U - Three-phase five-column double-reverse star type axial double-split rectifier transformer body insulation structure - Google Patents
Three-phase five-column double-reverse star type axial double-split rectifier transformer body insulation structure Download PDFInfo
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- CN218241555U CN218241555U CN202221985858.4U CN202221985858U CN218241555U CN 218241555 U CN218241555 U CN 218241555U CN 202221985858 U CN202221985858 U CN 202221985858U CN 218241555 U CN218241555 U CN 218241555U
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Abstract
The utility model discloses a three-phase five-column double-reverse-star type axial double-split rectifier transformer body insulation structure, which comprises a three-phase five-column iron core, wherein an upper clamp assembly is arranged at an upper iron yoke, a lower clamp assembly is arranged at a lower iron yoke, three iron core columns are all sleeved with a coil, the coil comprises a primary coil arranged at the outer layer and a secondary coil arranged at the inner layer, a shielding cylinder is arranged between the primary coil and the secondary coil and comprises an upper copper foil and a lower copper foil which are formed by coiling the upper copper coil and the lower copper coil, and each copper foil is welded with a grounding sheet; and side column clapboards are arranged on one sides of the two side columns facing the coil. The shielding cylinder with the upper grounding sheet and the lower grounding sheet can realize the insulation shielding of the primary coil and the secondary coil, further reduce the leakage inductance and the electromagnetic interference of the transformer and improve the consistency of the transformer; meanwhile, the air guide plate has the function of guiding ventilation, and the heat dissipation of the product is further improved.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to two anti-star type axial double split rectifier transformer ware body insulation system of three-phase five-column.
Background
In order to limit the short-circuit current and save the capital investment, the three-phase split transformer has been widely used in the power system, and then applied in the large-capacity multiphase multi-pulse rectifier system. Several branches of the split winding can be operated individually or simultaneously. The several branches of the split winding are not electrically but magnetically connected. In the prior art, the insulation of the split winding is difficult to simultaneously shield and meet the requirements of electric and magnetic interference.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects of the prior art, providing a three-phase five-column double-reverse-star axial double-split rectifier transformer body insulation structure, which comprises a three-phase five-column iron core, wherein the upper phase five-column iron core is arranged on a frame, the three-phase five-column iron core comprises an upper iron yoke, a lower iron yoke, three iron core columns and two side columns, the upper iron yoke is provided with an upper clamping piece combination, the lower iron yoke is provided with a lower clamping piece combination, the three iron core columns are all sleeved with a coil, the coil comprises a primary coil arranged at the outer side and a secondary coil arranged at the inner side, a shielding cylinder is arranged between the primary coil and the secondary coil, the shielding cylinder comprises a copper foil formed by upper section and lower section of copper foil in a winding manner, each section of copper foil is welded with a grounding piece, the grounding piece comprises an upper grounding piece and a lower grounding piece, the upper end of the shielding cylinder is connected with the upper clamping piece combination through the upper piece, and the lower end of the shielding cylinder is connected with the lower clamping piece combination through the lower grounding piece; and side column clapboards are arranged on one sides of the two side columns facing the coil.
Further, the heights of the primary coil, the secondary coil and the shielding cylinder are the same.
Furthermore, the upper ends of the primary coil, the secondary coil and the shielding cylinder are fixed relative to the upper clamping piece through an upper cushion block and a pressing nail in a combined mode.
Furthermore, the lower ends of the primary coil, the secondary coil and the shielding cylinder are fixed relative to the lower clamping piece through a lower cushion block and a pressing nail in a combined mode.
Further, the primary coil is provided with an upper winding group and a lower winding group which are symmetrical up and down.
Furthermore, the primary coil is of an integrated pouring structure.
Furthermore, the secondary coil is a split secondary coil with an upper coil and a lower coil, and the upper coil and the lower coil are axially stacked through an inter-segment insulating cushion block.
Furthermore, the secondary coil and the pulling plate of the iron core column are fixed through a round silica gel stay and an insulating supporting plate.
Has the advantages that: the utility model has the advantages of that:
(1) The shielding cylinder with the upper grounding sheet and the lower grounding sheet can realize the insulation shielding of the primary coil and the secondary coil, further reduce the leakage inductance and the electromagnetic interference of the transformer and improve the consistency of the transformer; meanwhile, the air guide plate has the function of guiding ventilation, and the heat dissipation of the product is further improved.
(2) The arrangement of the inter-segment insulating blocks can not only enable the secondary coil to realize the axial stacking of the upper coil and the lower coil, but also ensure the coaxiality of the shielding cylinder.
(3) The upper winding and the lower winding which are symmetrical up and down during the winding of the primary coil are cast into a whole finally, and the traditional structure that the upper winding and the lower winding are separated and independent is changed. On one hand, the overall mechanical strength of the coil is improved, and on the other hand, the heat dissipation of the product is improved.
(4) The side column partition plate arranged on the side column enhances the electrical strength from the outermost side of the primary coil to the side column.
Drawings
FIG. 1 is a front view of an insulation structure of a body of a three-phase five-column double-reverse star-shaped axial double-split rectifier transformer;
FIG. 2 is a top view of FIG. 1
FIG. 3 is a schematic view showing the installation state of the silica gel stay and the insulating support plate;
FIG. 4 is a schematic view of the structure of an inter-segment insulating block;
in the figure: 1. the device comprises a frame, 2, an upper clamp assembly, 3, a lower clamp assembly, 4, a coil, 5, a primary coil, 6, a secondary coil, 7, a shielding cylinder, 8, a core column, 9, a side column, 10, a side column partition board, 11, an upper cushion block, 12, a lower cushion block, 13, an intersegment insulating block, 14, a silica gel stay, 15 and an insulating supporting plate.
Detailed Description
In order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.
As shown in fig. 1-4, a three-phase five-limb double-reverse-star axial double-split rectifier transformer body insulation structure comprises a three-phase five-limb iron core, wherein the upper phase five-limb iron core is mounted on a frame 1, the three-phase five-limb iron core comprises an upper iron yoke, a lower iron yoke, three iron core limbs 8 and two side limbs 9, an upper clamp assembly 2 is mounted at the upper iron yoke, a lower clamp assembly 3 is mounted at the lower iron yoke, coils 4 are sleeved on the three iron core limbs, each coil 4 comprises a primary coil 5 arranged on the outer side and a secondary coil 6 arranged on the inner side, a shielding cylinder 7 is arranged between the primary coil 5 and the secondary coil 6, each shielding cylinder 7 comprises a copper foil formed by upper and lower sections of joint winding, each section of copper foil is welded with a grounding piece, each grounding piece comprises an upper grounding piece and a lower grounding piece, the upper end of each shielding cylinder 7 is connected with the upper clamp assembly through the upper grounding piece, and the lower end of each shielding cylinder 7 is connected with the lower clamp assembly 3 through the lower grounding piece; and side column clapboards 10 are arranged on one sides of the two side columns 9 facing the coil.
In this embodiment, the heights of the primary coil 5, the secondary coil 6 and the shielding cylinder 7 are the same.
The upper ends of the primary coil 5, the secondary coil 6 and the shielding cylinder 7 are fixed relative to the upper clamp assembly 2 through an upper cushion block 11 and a pressing nail.
In this embodiment, the lower ends of the primary coil 5, the secondary coil 6 and the shielding cylinder 7 are fixed relative to the lower clip assembly 3 through the lower cushion block 12 and the press pin.
In the present embodiment, the primary coil 5 has an upper winding group and a lower winding group which are symmetrical up and down. The primary coil is of an integrated pouring structure.
In this embodiment, the secondary coil 6 is a split secondary coil having an upper coil and a lower coil, and the upper coil and the lower coil are axially stacked by an inter-segment insulating pad 13.
In the present embodiment, the secondary coil and the pulling plate of the core barrel 8 are fixed by the silicone rubber stay 14 and the insulating supporting plate 15.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A three-phase five-column double-reverse-star type axial double-split rectifier transformer body insulation structure is characterized by comprising a three-phase five-column iron core, wherein the three-phase five-column iron core is arranged on a frame and comprises an upper iron yoke, a lower iron yoke, three iron core columns and two side columns, an upper clamp assembly is arranged at the upper iron yoke, a lower clamp assembly is arranged at the lower iron yoke, coils are sleeved on the three iron core columns and comprise a primary coil arranged on the outer side and a secondary coil arranged on the inner side, a shielding cylinder is arranged between the primary coil and the secondary coil and comprises an upper copper foil and a lower copper foil which are wound in a winding mode, a grounding piece is welded on each section of copper foil and comprises an upper grounding piece and a lower grounding piece, the upper end of the shielding cylinder is connected with the upper clamp assembly through the upper grounding piece, and the lower end of the shielding cylinder is connected with the lower clamp assembly through the lower grounding piece; and side column clapboards are arranged on one sides of the two side columns towards the coil.
2. The insulation structure of the body of a three-phase five-limb double-inverted star-shaped axial double-split rectifier transformer according to claim 1, wherein the heights of the primary coil, the secondary coil and the shielding cylinder are the same.
3. The insulation structure of the body of a three-phase five-limb double-anti-star axial double-split rectifier transformer according to claim 2, wherein the upper ends of the primary coil, the secondary coil and the shielding cylinder are fixed by an upper cushion block and a pressing pin in combination relative to an upper clamping piece.
4. The insulation structure of the body of a three-phase five-column double-anti-star axial double-split rectifier transformer according to claim 1, wherein the lower ends of the primary coil, the secondary coil and the shielding cylinder are fixed to the lower clamping piece through a lower cushion block and a pressing pin.
5. The insulation structure of a body of a three-phase five-limb double-anti-star axial double-split rectifier transformer as claimed in claim 1, wherein said primary winding is provided with upper and lower winding groups which are symmetrical.
6. The insulation structure of the body of a three-phase five-limb double-inverted star-shaped axial double-split rectifier transformer according to claim 5, wherein the primary coil is of an integrally cast structure.
7. The insulation structure of a body of a three-phase five-limb double-inverted star-shaped axial double-split rectifier transformer according to claim 1, wherein the secondary coil is a split secondary coil having an upper coil and a lower coil, and the upper coil and the lower coil are axially stacked by an inter-segment insulation pad.
8. The insulation structure of a three-phase five-column double anti-star axial double split rectifier transformer body according to claim 7, wherein the secondary coil is fixed to the pull plate of the core limb by a circular silica gel stay and an insulation support plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221985858.4U CN218241555U (en) | 2022-07-29 | 2022-07-29 | Three-phase five-column double-reverse star type axial double-split rectifier transformer body insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221985858.4U CN218241555U (en) | 2022-07-29 | 2022-07-29 | Three-phase five-column double-reverse star type axial double-split rectifier transformer body insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218241555U true CN218241555U (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221985858.4U Active CN218241555U (en) | 2022-07-29 | 2022-07-29 | Three-phase five-column double-reverse star type axial double-split rectifier transformer body insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218241555U (en) |
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2022
- 2022-07-29 CN CN202221985858.4U patent/CN218241555U/en active Active
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